Refrigeration appliance and control method therefor

Abstract

Provided in the present application are a refrigeration appliance and a control method therefor. The refrigeration appliance comprises: a cabinet, which is provided with a compartment and a refrigeration chamber, wherein a refrigeration device is mounted in the refrigeration chamber; a freshness-keeping container, which is arranged inside the compartment, wherein a flow guide air duct is provided on the outer surface of the freshness-keeping container; and a cold supply channel, which brings the refrigeration chamber into communication with the compartment and has an air inlet corresponding to the flow guide air duct, wherein cold air from the refrigeration chamber flows into the compartment and out of the freshness-keeping container through the air inlet, and flows on the outer surface of the freshness-keeping container along the flow guide air duct. In this way, the rapid cooling of the freshness-keeping container can be realized, and the cooling uniformity can also be ensured, thereby preventing the occurrence of local high temperatures in the freshness-keeping container; moreover, the environment in the freshness-keeping container is not affected, thereby preventing violent fluctuations in the freshness-keeping environment.

Description

Refrigeration appliances and their control methods

[0001] This application is based on and claims priority to Chinese patent applications with application numbers 202411596266.7, 202422732138.2, 202422732169.8, 202411596226.2, 202422731590.7, 202411595559.3, 202411589886.8 and 202411595547.0, filed on November 8, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of household appliance technology, and more specifically to a refrigeration appliance and its control method. Background Technology

[0003] Modified atmosphere storage technology generally refers to the technology of extending the shelf life of food by adjusting the gas atmosphere (e.g., the proportion of gas components) of the enclosed space where the stored food is located. Its basic principle is to obtain a gas atmosphere with a different composition than air in a certain enclosed space through various adjustment methods, so as to inhibit the physiological and biochemical processes and microbial activities that cause the stored food (usually food ingredients) to spoil.

[0004] Those skilled in the art will know that air composition by volume percentage includes approximately 78% nitrogen, approximately 21% oxygen, approximately 0.939% rare gases, 0.031% carbon dioxide, and 0.03% other gases and impurities, such as ozone, nitric oxide, nitrogen dioxide, water vapor, etc.

[0005] In the field of modified atmosphere storage, a preservative atmosphere gas with low oxygen content can be introduced into a closed space, for example, the oxygen content is less than 21% by volume; or an oxygen-rich preservative atmosphere gas can be introduced into a closed space, for example, the oxygen content is greater than 21% by volume.

[0006] In addition to regulating the gas atmosphere, temperature control is also required in refrigeration appliances.

[0007] Currently, with the widespread application of frost-free refrigerators, they are increasingly favored by consumers. The cooling principle of a frost-free refrigerator is to utilize circulating air for cooling. When the warmer air flows through the built-in evaporator, heat exchange occurs directly between the two, lowering the air temperature. The cooled air is then blown into the refrigerator, thus reducing its temperature. However, improving the cooling efficiency of frost-free refrigerators has become a key focus of their research and development.

[0008] However, existing refrigeration appliances with modified atmosphere technology cannot balance temperature control and modified atmosphere preservation, and often cause drastic fluctuations in the gas atmosphere for modified atmosphere preservation due to temperature control issues.

[0009] Any prior art mentioned in the specification does not imply confirmation or suggestion that such prior art constitutes part of the general common knowledge in any jurisdiction, or that it can be reasonably expected that such prior art will be understood, regarded as relevant and / or combined with other prior art by a person skilled in the art. Summary of the Invention

[0010] In view of the above-mentioned technical problems, the purpose of this application is to provide a refrigeration appliance.

[0011] To achieve the above objectives, one embodiment provides a refrigeration appliance. The refrigeration appliance includes:

[0012] The enclosure is equipped with compartments and a refrigeration chamber, with a refrigeration unit installed inside the refrigeration chamber;

[0013] The food preservation container is placed in the compartment, and an air duct is formed outside the food preservation container;

[0014] The cooling channel connecting the refrigeration chamber and the compartment has an air inlet; the cold air from the refrigeration chamber flows through the air inlet into the compartment and outside the preservation container, and flows along the guide air duct on the outer surface of the preservation container.

[0015] Preferably, the outer surface of the preservation container is provided with a number of guide ribs, and the guide ribs form a guide air channel, with the position of the air inlet corresponding to the guide air channel.

[0016] Preferably, the box includes an inner liner;

[0017] The refrigeration appliance includes a door panel and a preservation cylinder assembled in the inner liner. The preservation cylinder encloses a compartment with an open front. The door panel is movably installed at the open front and is used to open and close the compartment.

[0018] The food preservation container includes a drawer that is movably housed inside the food preservation tube. The drawer includes a box body with an opening for retrieving items and a cover that opens and closes the opening for retrieving items. The box body and the door panel are fixedly connected.

[0019] Several guide ribs are provided on the outer surface of the drawer.

[0020] Preferably, the air inlet is located on the upper part of the rear wall of the food storage container and is higher than the cover plate;

[0021] The plurality of guide ribs include a first guide rib and a second guide rib disposed on the cover plate, the first guide rib and the second guide rib being disposed opposite each other on the left and right;

[0022] The airflow duct is formed between the first and second airflow ribs, and is directly opposite the air inlet to guide the cold air to flow forward along the cover plate.

[0023] Preferably, one of the cover plate and the box body is provided with protruding posts on the left and right sides, and the other is provided with a limit hook;

[0024] The protruding post is inserted into the limiting hook to restrict the lid from moving back and forth with the box. When the box is pulled forward from the preservation tube, the lid is suspended inside the preservation tube by the cooperation of the protruding post and the limiting hook.

[0025] Preferably, the refrigeration appliance further includes a controlled atmosphere unit and a controlled atmosphere channel, the controlled atmosphere channel being used to deliver preservative gases from the controlled atmosphere unit to the interior of the drawer;

[0026] The cover is equipped with a controlled atmosphere inlet, and the controlled atmosphere channel connects to the inside of the drawer through the controlled atmosphere inlet.

[0027] Preferably, the enclosure includes an inner liner that surrounds the compartment;

[0028] The food preservation container includes a food preservation cylinder assembled in an inner liner and a door panel for sealing and closing the food preservation cylinder, with several guide ribs disposed on the outer surface of the food preservation cylinder.

[0029] Preferably, the refrigeration appliance also has an air duct cover and a shielding plate, the air duct cover being assembled on the rear wall of the inner liner, and the shielding plate being located above the preservation cylinder;

[0030] The air inlet is located on the duct cover, higher than the top wall of the refrigerator and lower than the shielding plate;

[0031] The plurality of guide ribs include a first guide rib and a second guide rib disposed on the top wall of the preservation container, the first guide rib and the second guide rib being disposed opposite each other on the left and right;

[0032] The airflow duct is formed between the first and second airflow ribs, and is directly opposite the air inlet to guide the cold air to flow forward along the preservation cylinder.

[0033] Preferably, the rear ends of the first guide rib and the second guide rib are located on the outer side of the air inlet in the left-right direction;

[0034] The airflow duct includes a rearward expansion section and a frontward equal-width section. The width of the expansion section gradually increases from front to back, while the width of the equal-width section remains constant from front to back.

[0035] Preferably, the preservation container is also provided with a window that connects the interior of the preservation container and the compartment, and the window is exposed to the air duct.

[0036] The window is sealed with a gas-barrier and moisture-permeable membrane, which is configured to allow water vapor to enter or exit the interior of the drawer in one direction.

[0037] Preferably, the refrigeration appliance further includes:

[0038] A modified atmosphere unit, located outside the preservation container, is used to generate a preservative gas;

[0039] The modified atmosphere channel connects the modified atmosphere unit and the interior of the preservation container, allowing preservation gases to enter the interior of the preservation container.

[0040] Preferably, the modified atmosphere unit is configured as an electrolytic modified atmosphere unit that forms a preservative gas through an electrochemical reaction, which includes an anode, a cathode, and an inner cavity that can at least contain an electrolyte.

[0041] One side of the cathode is exposed in the inner cavity and the other side is exposed in the modified atmosphere channel. The cathode is used to consume the oxygen in the modified atmosphere channel through an electrochemical reaction to make the resulting preservation gas in an oxygen-deficient state.

[0042] Alternatively, one or both sides of the anode are exposed in the inner cavity, and the modified atmosphere channel connects to the inner cavity. The anode is used to generate oxygen in the inner cavity through an electrochemical reaction to make the resulting preservation gas oxygen-rich.

[0043] Preferably, the plurality of guide ribs further includes a plurality of third guide ribs disposed between the first guide rib and the second guide rib;

[0044] The third guide rib divides the expansion section into at least two sub-air ducts, which are arranged side by side.

[0045] Preferably, at the expansion section of the airflow duct, at least a portion of the first guide rib and / or the second guide rib is arranged to extend at an angle of 30° to 60° with respect to the front-back direction.

[0046] Preferably, the first guide rib and / or the second guide rib are configured to extend continuously from the rear end to the front end; or,

[0047] At the equal-width section of the air duct, the first guide rib and / or the second guide rib are provided with several notches that extend intermittently. The notches allow cold air to be diverted to the left and / or right side of the preservation container.

[0048] Preferably, the refrigeration appliance includes a temperature sensor, with the first temperature sensor mounted on the preservation container and located outside the air duct.

[0049] Preferably, the preservation container has a modified atmosphere inlet, and the modified atmosphere channel is connected to the interior of the preservation container through the modified atmosphere inlet;

[0050] The controlled atmosphere inlet and the first temperature sensor are arranged adjacent to each other.

[0051] The food preservation container also has a surrounding panel that surrounds the modified atmosphere inlet and the first temperature sensor and protrudes from the outer surface of the food preservation container relative to the flow guide ribs.

[0052] Compared with the prior art, the beneficial effects of one embodiment of this application are as follows: by setting guide ribs on the outside of the preservation container, cold air can flow along the outer surface of the preservation container, which can not only achieve rapid cooling of the preservation container, but also ensure uniform cooling and avoid local high temperature inside the preservation container, while not affecting the environment inside the preservation container and avoiding drastic fluctuations in the preservation environment.

[0053] The purpose of this application is to provide a refrigeration appliance.

[0054] To achieve the above objectives, one embodiment provides a refrigeration appliance. The refrigeration appliance includes:

[0055] The container is equipped with an open food storage container and a refrigeration compartment with a refrigeration unit.

[0056] A drawer that is movably housed inside a food storage container, comprising a box body with an opening for retrieving items and a cover for opening and closing the opening for retrieving items;

[0057] The door panel connected to the container moves synchronously with the container and closes the opening of the food storage container;

[0058] The cooling aisle connects the refrigeration compartment and the preservation container, allowing the cold air from the refrigeration compartment to flow into the preservation container and out of the drawer;

[0059] A modified atmosphere unit is located outside the food storage container and generates a preservative gas.

[0060] The modified atmosphere channel connects the modified atmosphere unit to the inside of the drawer, allowing preservative gases to enter the drawer.

[0061] Preferably, the modified atmosphere unit is used to consume oxygen in the air to form an oxygen-deficient preservative gas, and / or to generate oxygen to form an oxygen-rich preservative gas.

[0062] The modified atmosphere channel connects the modified atmosphere unit and the inside of the drawer to allow either oxygen-deficient or oxygen-enriched preservative gases to enter the drawer.

[0063] Preferably, the modified atmosphere unit is configured as an electrolytic modified atmosphere unit that forms a preservative gas through an electrochemical reaction, which includes an anode, a cathode, and an inner cavity that can at least contain an electrolyte.

[0064] One side of the cathode is exposed in the inner cavity and the other side is exposed in the modified atmosphere channel. The cathode is used to consume the oxygen in the modified atmosphere channel through an electrochemical reaction to form an oxygen-deficient preservation gas.

[0065] Alternatively, one or both sides of the anode are exposed in the inner cavity. The anode is used to generate oxygen in the inner cavity through an electrochemical reaction to form an oxygen-enriched preservative gas, and the modified atmosphere channel supplies the oxygen-enriched preservative gas to the inside of the drawer.

[0066] Preferably, the food preservation container is configured with a cylindrical structure;

[0067] The cooling aisle has an air inlet located on the food storage container;

[0068] The refrigeration appliance also includes air ducts corresponding to the air inlet for the flow of cold air, the air ducts being formed between the drawer and the crisper and / or between the drawer and the door panel.

[0069] Preferably, the refrigeration appliance includes a temperature sensor mounted on the drawer and located outside the airflow duct.

[0070] Preferably, the outer wall of the drawer is provided with a mounting groove and a surrounding panel around the mounting groove;

[0071] The mounting slot has a detection port that communicates with the interior of the drawer;

[0072] The temperature sensor is fixedly installed in the mounting slot, with its detection end located at the detection port;

[0073] The side panel extends from the outer wall of the drawer to the inner wall of the food storage container.

[0074] Preferably, the drawer also has a controlled atmosphere inlet connecting the interior and exterior of the drawer, and a surrounding panel surrounds the controlled atmosphere inlet.

[0075] The controlled atmosphere channel connects to the inside of the drawer via the controlled atmosphere inlet.

[0076] Preferably, the controlled atmosphere inlet is located on the cover plate;

[0077] The modified atmosphere channel includes a pipe connector that is fixedly installed on the food storage container. One end of the pipe connector is exposed on the outer wall of the food storage container, and the other end is inserted and fitted into the modified atmosphere inlet.

[0078] Preferably, the cover is movably installed on the food storage container;

[0079] When the container is pulled forward from inside the food storage container, the lid hangs inside the container.

[0080] Preferably, the outer wall of the drawer is provided with a number of guide ribs, which define at least a portion of the airflow duct.

[0081] Preferably, the cover plate has a ventilation window that connects the inside of the drawer to the air duct.

[0082] The ventilation window is sealed with a breathable membrane that allows water vapor to enter or exit the drawer in one direction.

[0083] Preferably, the cooling aisle has an air inlet located on the refrigerator container, on the upper part of the rear wall of the refrigerator container opposite to the opening;

[0084] The plurality of guide ribs include a first guide rib and a second guide rib disposed on the cover plate, the first guide rib and the second guide rib being disposed opposite each other on the left and right;

[0085] The airflow guide duct includes a first airflow guide duct formed between the first airflow guide rib and the second airflow guide rib. The first airflow guide duct faces the air inlet to guide the cold air to flow forward along the cover plate.

[0086] Preferably, the first guide rib and the second guide rib extend from the rear edge of the cover plate to the front edge of the cover plate, respectively;

[0087] The airflow duct includes a rearward expansion section and a frontward equal-width section. The width of the expansion section gradually increases from front to back, while the width of the equal-width section remains constant from front to back.

[0088] Preferably, the airflow duct further includes a second airflow duct formed between the drawer and the door panel.

[0089] Preferably, the refrigeration appliance includes an oxygen concentration sensor;

[0090] An oxygen concentration sensor is installed inside the drawer to detect the oxygen concentration inside the drawer.

[0091] Preferably, the box body includes an inner liner that encloses a compartment, and the food preservation container is installed inside the compartment;

[0092] The refrigeration appliance includes insulation components and air duct cover plates. The insulation components surround the outside of the refrigeration cylinder, and the air duct cover plates are assembled to the rear wall of the inner liner.

[0093] The cooling aisle is located at least partially between the duct cover and the rear wall of the inner liner, and includes an air inlet on the refrigerator, through which cold air enters the refrigerator.

[0094] Compared with the prior art, the beneficial effects of one embodiment of this application are as follows: by combining the configuration of the controlled atmosphere channel, the cooling channel, the preservation container, and the drawer, this application supplies preservation gas to the inside of the drawer to achieve controlled atmosphere preservation of the storage environment inside the drawer. On the other hand, it supplies cold air to the outside of the drawer and the inside of the preservation container to achieve cold air cooling in the small space outside the drawer. While efficiently maintaining the low temperature environment inside the drawer, it avoids the large amount of cold air entering the drawer and causing the atmosphere inside the drawer to fluctuate drastically with the cooling demand. In this way, both the temperature inside the drawer and the preservation gas are taken into account, thereby achieving excellent food storage and preservation effect.

[0095] In view of the above-mentioned technical problems, the purpose of this application is to provide a refrigeration appliance.

[0096] To achieve the above objectives, one embodiment provides a refrigeration appliance. The refrigeration appliance includes:

[0097] The enclosure is equipped with compartments and a refrigeration chamber, with a refrigeration unit installed inside the refrigeration chamber;

[0098] Food preservation containers, which are placed in compartments;

[0099] Airflow ducts are installed on the outside of the food storage container;

[0100] The cooling channel connecting the refrigeration chamber and the compartment has an air inlet. The cold air from the refrigeration chamber flows into the compartment through the air inlet and flows along the guide air duct outside the preservation container.

[0101] The second temperature sensor is located on the outside of the preservation container and is used to sense the internal temperature of the preservation container. The second temperature sensor is located outside the air duct.

[0102] Preferably, the outer wall of the preservation container is provided with an installation groove, and the installation groove has a detection port that communicates with the interior of the preservation container;

[0103] The second temperature sensor is fixedly installed in the mounting slot, with its detection end located at the detection port.

[0104] Preferably, the preservation container has a modified atmosphere inlet and a modified atmosphere outlet. The preservation container can introduce preservation gas into the container through the modified atmosphere inlet and discharge preservation gas out through the modified atmosphere outlet.

[0105] The line spacing between the mounting slot and the controlled atmosphere inlet is smaller than the line spacing between the mounting slot and the controlled atmosphere outlet.

[0106] Preferably, the preservation container has a modified atmosphere inlet, through which preservation gas can be introduced into the preservation container;

[0107] The mounting slot and the controlled atmosphere inlet are arranged side by side, adjacent to each other.

[0108] Preferably, the outer surface of the food preservation container is provided with several guide ribs;

[0109] At least a portion of the airflow duct is formed between several guide ribs.

[0110] Preferably, the preservation container also has a surrounding panel that surrounds the modified atmosphere inlet and the second temperature sensor and protrudes from the outer surface of the preservation container relative to the flow guide ribs.

[0111] Preferably, the refrigeration appliance further includes a modified atmosphere unit located outside the preservation container, the modified atmosphere unit being used to generate a preservation gas and supply the preservation gas to the interior of the preservation container via a modified atmosphere inlet.

[0112] Preferably, the refrigeration appliance also includes a controlled atmosphere channel, which connects the controlled atmosphere unit and the interior of the preservation container to allow preservation gas to enter the interior of the preservation container.

[0113] Preferably, the controlled atmosphere unit includes an anode, a cathode, and an inner cavity capable of containing at least an electrolyte;

[0114] One side of the cathode is exposed in the inner cavity and the other side is exposed in the modified atmosphere channel. The cathode is used to consume the oxygen in the modified atmosphere channel through an electrochemical reaction to make the resulting preservation gas in an oxygen-deficient state.

[0115] Alternatively, one or both sides of the anode are exposed in the inner cavity, and the modified atmosphere channel connects to the inner cavity. The anode is used to generate oxygen in the inner cavity through an electrochemical reaction to make the resulting preservation gas oxygen-rich.

[0116] Preferably, the cabinet includes an inner liner; the refrigeration appliance includes a door panel and a preservation cylinder assembled in the inner liner, the preservation cylinder enclosing a compartment with an open front, and the door panel is movably disposed at the open front and used to open and close the compartment;

[0117] The food preservation container includes a drawer that is movably housed inside the food preservation tube. The drawer includes a box body with an opening for retrieving items and a cover that opens and closes the opening for retrieving items. The box body and the door panel are fixedly connected.

[0118] Several guide ribs are provided on the outer surface of the drawer.

[0119] Preferably, a second airflow duct is formed between the drawer and the door panel, and the cold air enters the second airflow duct after passing through several guide ribs.

[0120] Preferably, one of the cover plate and the box body is provided with protruding posts on the left and right sides, and the other is provided with a limit hook;

[0121] The protruding post is inserted into the limiting hook to restrict the lid from moving back and forth with the box body. When the box body is pulled forward from the food storage container, the lid is suspended inside the food storage container with the cooperation of the protruding post and the limiting hook.

[0122] The modified atmosphere inlet is located on the cover plate, and the modified atmosphere channel includes a pipe connector fixedly installed on the preservation container. One end of the pipe connector is exposed on the outside of the preservation container, and the other end is inserted into the modified atmosphere inlet.

[0123] Preferably, the enclosure includes an inner liner that surrounds the compartment;

[0124] The food preservation container includes a food preservation cylinder assembled in an inner liner and a door panel for sealing and closing the food preservation cylinder, with several guide ribs disposed on the outer surface of the food preservation cylinder.

[0125] Preferably, the preservation container is also provided with a window that connects the interior of the preservation container and the compartment, and the window is exposed to the air duct.

[0126] The window is sealed with a gas-barrier and moisture-permeable membrane, which is configured to allow water vapor to enter or exit the interior of the preservation container in one direction.

[0127] Preferably, the refrigeration appliance also includes an oxygen concentration sensor;

[0128] An oxygen concentration sensor is placed inside the food storage container to detect the oxygen concentration inside the container.

[0129] Preferably, the refrigeration appliance also has a controller;

[0130] The controller is used to control the operation of the controlled atmosphere unit based on oxygen concentration or internal temperature, and to control the operation of the refrigerator based on internal temperature.

[0131] Compared with the prior art, the beneficial effects of one embodiment of this application are as follows: by setting a guide air duct outside the food preservation container, cold air can flow along the outer surface of the food preservation container, thereby achieving rapid cooling of the food preservation container. It can also ensure uniform cooling and avoid local high temperatures inside the food preservation container. On this basis, a second temperature sensor is set outside the food preservation container to detect the internal temperature of the food preservation container. The second temperature sensor is located outside the guide air duct, so on the one hand, the cold air will not directly contact the second temperature sensor, and on the other hand, the second temperature sensor is not within the area of ​​the food preservation container through which the cold air flows. This can greatly reduce the temperature detection deviation (e.g., lower than expected) caused by the direct blowing of cold air, thereby improving the accuracy of temperature monitoring results and ensuring the cooling effect at all locations inside the food preservation container.

[0132] The purpose of this application is to provide a refrigeration appliance and its control method.

[0133] To achieve the above objectives, one embodiment provides a refrigeration appliance. The refrigeration appliance includes:

[0134] The container is equipped with compartments;

[0135] A preservation container set in a compartment, the preservation container includes a main body and a fitting mounted on the main body, the fitting is provided with a mounting groove and a modified atmosphere inlet connecting the inside and outside of the preservation container;

[0136] A modified atmosphere unit, located outside the preservation container, is used to generate a preservative gas;

[0137] A modified atmosphere channel connects to the modified atmosphere unit, and one end is located at the modified atmosphere inlet to connect to the interior of the preservation container. Preservative gas enters the interior of the preservation container through the modified atmosphere channel.

[0138] A temperature sensor, which is fixedly installed in a mounting slot, is used to sense the internal temperature of the food preservation container.

[0139] Preferably, the mounting slot has a detection port that communicates with the interior of the preservation container, and the detection end of the temperature sensor is located at the detection port.

[0140] Preferably, the fitting includes a surround plate that surrounds the controlled atmosphere inlet and the mounting slot and protrudes from the outer surface of the main body.

[0141] Preferably, the enclosure surrounds the open opening of the exposed mounting slot and the controlled atmosphere inlet;

[0142] The temperature sensor is installed from the outside of the food storage container through an open opening into the mounting slot;

[0143] Refrigeration appliances also have seals that close the openings.

[0144] Preferably, the end of the controlled atmosphere channel is provided as a pipe connector, which is plugged into the gas interface.

[0145] Preferably, the enclosure is further provided with a refrigeration compartment, and a refrigeration unit is installed inside the refrigeration compartment;

[0146] The refrigeration equipment includes a cooling aisle, which connects the refrigeration chamber and the compartment, so that the cold air from the refrigeration chamber can flow into the compartment and outside the preservation container.

[0147] Preferably, the cooling aisle has an air inlet exposed in the compartment, through which cold air from the cooling aisle enters the compartment;

[0148] The refrigeration appliance also includes a guide air duct, which is located on the outside of the preservation container and guides the cold air flowing out of the air inlet.

[0149] Preferably, the connector is located outside the airflow duct.

[0150] Preferably, the outer surface of the main body is provided with a plurality of guide ribs, and at least a portion of the guide air duct is formed between the plurality of guide ribs.

[0151] Preferably, the main body is also provided with a window that connects the interior of the preservation container and the compartment, and the window is exposed to the air duct.

[0152] The window is sealed with a gas-barrier and moisture-permeable membrane, which is configured to allow water vapor to enter or exit the interior of the preservation container in one direction.

[0153] Preferably, the refrigeration appliance further includes a damper and a fan disposed between the refrigeration chamber and the air inlet; the refrigeration appliance includes:

[0154] A humidity sensor is installed inside the food storage container to sense the humidity level inside the container.

[0155] The controller is connected to a humidity sensor and a temperature sensor, and is used to control the start and stop of the cooler, the opening and closing of the dampers, and the start and stop of the fan based on the humidity value and / or the internal temperature.

[0156] Preferably, the controller is configured to, when the humidity value is greater than the first humidity threshold and the internal temperature is lower than the preservation temperature threshold, control the damper to open and the fan to run after the refrigerator stops running for a preset time, until the humidity value drops to the second humidity threshold; when the humidity value is greater than the first humidity threshold and the internal temperature is not lower than the preservation temperature threshold, control the refrigerator to run, the damper to open and the fan to run, until the humidity value drops to the second humidity threshold.

[0157] Preferably, the refrigeration appliance further includes a damper and a fan disposed between the refrigeration chamber and the air inlet; the refrigeration appliance also includes:

[0158] A gas concentration sensor is installed inside the food preservation container to detect the concentration of a target gas inside the container.

[0159] The controller is connected to a gas concentration sensor and a temperature sensor, and is used to control the start and stop of the controlled atmosphere unit, the start and stop of the cooler, the opening and closing of the dampers and the start and stop of the fan according to the target gas concentration and / or the internal temperature.

[0160] Preferably, the controller is configured to: when the target gas concentration meets the concentration threshold range, control the controlled atmosphere unit to stop operating and control the start / stop of the cooler, the opening and closing of the damper, and the start / stop of the fan according to the internal temperature; when the target gas concentration does not meet the concentration threshold range, control the controlled atmosphere unit to operate, and during the operation of the controlled atmosphere unit, when the internal temperature exceeds the first temperature threshold, control the cooler to operate, the damper to open, and the fan to operate; and during the operation of the controlled atmosphere unit, when the internal temperature exceeds the second temperature threshold, control the cooler to operate, the damper to open, and the fan to operate, and control the controlled atmosphere unit to stop operating.

[0161] The first temperature threshold is less than the second temperature threshold, and the start-up temperature threshold of the preservation container is between the first temperature threshold and the second temperature threshold.

[0162] Preferably, the cabinet includes an inner liner; the refrigeration appliance includes a door panel and a preservation cylinder assembled in the inner liner, the preservation cylinder enclosing a compartment with an open front, and the door panel is movably disposed at the open front and used to open and close the compartment;

[0163] The main body is a drawer that can be movably housed inside a food storage container. The drawer includes a box body with an upper access opening and a cover that opens and closes the access opening. The box body and the door panel are fixedly connected.

[0164] Preferably, the connector is fixedly installed on the cover plate, and the end of the modified atmosphere channel is fixedly set on the preservation container and inserted into the modified atmosphere inlet from the top and bottom.

[0165] Preferably, the container includes an inner liner that surrounds the compartment; the main body includes a preservation cylinder and a door panel that seals and closes the preservation cylinder, and the connecting parts are fixedly installed on the preservation cylinder.

[0166] Preferably, the modified atmosphere unit is configured as an electrolytic modified atmosphere unit that forms a preservative gas through an electrochemical reaction, which includes an anode, a cathode, and an inner cavity that can at least contain an electrolyte.

[0167] One side of the cathode is exposed in the inner cavity and the other side is exposed in the modified atmosphere channel. The cathode is used to consume the oxygen in the modified atmosphere channel through an electrochemical reaction to make the resulting preservation gas in an oxygen-deficient state.

[0168] Alternatively, one or both sides of the anode are exposed in the inner cavity, and the modified atmosphere channel connects to the inner cavity. The anode is used to generate oxygen in the inner cavity through an electrochemical reaction to make the resulting preservation gas oxygen-rich.

[0169] To achieve the above objectives, one embodiment provides a control method for a refrigeration appliance. The control method includes:

[0170] S101, determine whether the humidity value inside the preservation container is greater than the first humidity threshold. If yes, execute S102; otherwise, repeat S101.

[0171] S102, determine whether the internal temperature of the preservation container is lower than the preservation temperature threshold. If yes, proceed to S103; otherwise, proceed to S104.

[0172] S103: After the refrigeration unit stops operating for a preset time, the residual cold air from the refrigeration unit is blown into the compartment and outside the preservation container until the humidity value drops to the second humidity threshold, and then returns to S101.

[0173] S104, control the operation of the refrigeration unit to blow the cold air from the refrigeration unit into the compartment and outside the preservation container until the humidity value drops to the second humidity threshold, and return to S101.

[0174] To achieve the above objectives, one embodiment provides a control method for a refrigeration appliance. The control method includes:

[0175] S201, determine whether the concentration of the target gas in the preservation container meets the concentration threshold range. If yes, execute S202; otherwise, execute S204.

[0176] S202, determine whether the internal temperature of the preservation container has reached the start-up temperature threshold. If yes, execute S203; otherwise, return to S201.

[0177] S203, control the refrigeration unit to turn on so that the cold air from the refrigeration unit can be blown into the compartment and outside the preservation container until the internal temperature drops to the shutdown temperature threshold, and return to S201.

[0178] S204, control the operation of the controlled atmosphere unit and monitor whether the internal temperature exceeds the first temperature threshold. If it does, execute S205; otherwise, execute S201.

[0179] S205, control the refrigerator to turn on so that the cold air from the refrigerator can be blown into the compartment and outside the preservation container, and monitor whether the internal temperature exceeds the second temperature threshold. If so, control the controlled atmosphere unit to stop operating; otherwise, return to S201.

[0180] The first temperature threshold is less than the second temperature threshold, and the start-up temperature threshold of the preservation container is between the first temperature threshold and the second temperature threshold.

[0181] Compared with the prior art, the beneficial effects of one embodiment of this application are as follows: by setting a connecting part on the main body of the preservation container, and the connecting part integrating a mounting groove for fixing a temperature sensor and a modified atmosphere inlet for connecting a modified atmosphere channel, not only can the problems of temperature sensing and the introduction of preservation gas be solved, but the temperature sensor can also detect the temperature fluctuations caused by the preservation gas introduced by the modified atmosphere inlet in a timely manner, and then provide the controller of the refrigeration appliance with timely control of the supply of cold air and the entry of preservation gas, thereby facilitating the temperature control inside the preservation container, so as to improve the temperature stability while ensuring the stability of the modified atmosphere function; in addition, this can use only a single temperature sensor, which can monitor the temperature inside the preservation container and the temperature of the preservation gas in a coordinated manner to a certain extent, thus saving costs.

[0182] The purpose of this application is to provide a refrigeration appliance.

[0183] To achieve one of the above-mentioned objectives, one embodiment of this application provides a refrigeration appliance, comprising:

[0184] Room;

[0185] Refrigeration system;

[0186] Food preservation containers, housed in a compartment and equipped with cold air ducts;

[0187] The cooling aisle connects the refrigeration system and the compartments and supplies cold air to the outside of the preservation container. The cooling aisle can also connect to the inside of the preservation container through the cold air duct.

[0188] Controlled atmosphere unit;

[0189] The modified atmosphere channel connects the modified atmosphere unit and the interior of the preservation container, and supplies preservation gas to the interior of the preservation container.

[0190] As a further improvement of one embodiment of this application, the oxygen concentration inside the preservation container is greater than the oxygen concentration in the air, and the oxygen concentration in the preservation gas supplied to the inside of the preservation container by the modified atmosphere channel is greater than the oxygen concentration in the air.

[0191] As a further improvement of one embodiment of this application, the oxygen concentration inside the preservation container is lower than the oxygen concentration in the air, and the oxygen concentration in the preservation gas supplied to the inside of the preservation container by the modified atmosphere channel is lower than the oxygen concentration in the air.

[0192] As a further improvement of one embodiment of this application, the food preservation container includes a drawer, a cover, and a door. The drawer has a first opening, the cover is used to close the first opening, and the door is connected to the drawer. The refrigeration appliance includes a food preservation cylinder, which surrounds a compartment. The food preservation cylinder has a second opening, and the door is used to open or close the second opening. The opening directions of the first opening and the second opening are different.

[0193] As a further improvement of one embodiment of this application, the preservation container is provided with an air inlet, which connects to the refrigeration system and the compartment, and a cold air channel is provided on the cover plate, which connects the internal and external spaces of the preservation container.

[0194] As a further improvement of one embodiment of this application, the air inlet is located on the side of the cover plate away from the drawer.

[0195] As a further improvement of one embodiment of this application, the food storage container includes a first wall disposed opposite to the door panel, and an air inlet is disposed on the first wall.

[0196] As a further improvement of one embodiment of this application, the cold air channel is located near the air inlet of the preservation container.

[0197] As a further improvement of one embodiment of this application, the cold air channel is located at one end of the cover plate near the first wall.

[0198] As a further improvement of one embodiment of this application, the cold air channel is located on the first wall near the air inlet.

[0199] As a further improvement of one embodiment of this application, multiple cold air channels are provided.

[0200] As a further improvement of one embodiment of this application, multiple cold air channels are arranged at intervals along a first direction, which is the direction from the first wall toward the door panel.

[0201] As a further improvement of one embodiment of this application, the cold air duct includes at least one of a slot, a hole, and a groove.

[0202] As a further improvement of one embodiment of this application, the cover plate is fixedly connected to the food storage container.

[0203] As a further improvement of one embodiment of this application, the cold air channel is a square groove or an arc-shaped groove.

[0204] As a further improvement of one embodiment of this application, the food preservation container also includes a connecting part that connects the drawer and the door panel, and the connecting part is provided with multiple ventilation openings.

[0205] Compared with existing technologies, the refrigeration appliance of this application supplies preservative gas to the inside of the preservation container through a controlled atmosphere channel, which can regulate the oxygen concentration inside the preservation container. The water vapor carried by the preservative gas can increase the humidity inside the preservation container, thereby delaying the drying of the food stored in the preservation container and improving its preservation effect. Cold air is supplied to the outside of the preservation container through a cooling channel. This cold air circulates on the outside of the preservation container, thereby removing some of the heat inside the preservation container and cooling it down. This prevents a large amount of cold air from being sent into the preservation container and interfering with the preservative gas, thus avoiding large fluctuations in the oxygen concentration and preventing the food from drying out, thereby avoiding affecting the preservation effect. A portion of the cold air can be sent into the preservation container through the cold air channel, thereby preventing excessive water vapor carried by the preservative gas from causing condensation and frost inside the preservation container.

[0206] The purpose of this application is to provide a refrigeration appliance to solve the problem of poor preservation effect of existing refrigeration appliances.

[0207] To achieve one of the above-mentioned objectives, one embodiment of this application provides a refrigeration appliance, comprising:

[0208] Room;

[0209] The food preservation container is housed in a compartment and is equipped with a selectively breathable and moisture-permeable membrane to allow oxygen and moisture to pass through. The food preservation container is also equipped with an air inlet.

[0210] An air guide plate is installed inside the preservation container. The air guide plate is located at the air inlet and can rotate relative to the selectively breathable and moisture-permeable membrane.

[0211] Refrigeration system;

[0212] The cooling aisle connects the refrigeration system and the air inlet to supply cold air to the preservation containers;

[0213] A humidity sensor is used to detect the humidity inside a food storage container;

[0214] The control system, connected to the humidity sensor and air guide plate, is used for:

[0215] The angle of the air guide plate relative to the selectively breathable and moisture-permeable membrane is controlled based on the humidity (RH) detected by the humidity sensor.

[0216] As a further improvement of one embodiment of this application, the refrigeration appliance includes a preservation cylinder that surrounds a compartment, the preservation cylinder having a first opening;

[0217] The fresh-keeping container includes a first plate and a cover plate that are perpendicular to each other. The first plate is disposed opposite to the first opening. The air inlet and the selectively breathable and moisture-permeable membrane are both disposed on the cover plate. The air guiding plate is rotatably connected to the first plate. When the plane where the air guiding plate is located passes through the selectively breathable and moisture-permeable membrane, the air inlet faces the air guiding plate.

[0218] As a further improvement of an embodiment of the present application, the control system is further configured to:

[0219] When RH > the first preset humidity RH1, control the air guiding plate to rotate to a plane where the air guiding plate is located passes through the selectively breathable and moisture-permeable membrane.

[0220] As a further improvement of an embodiment of the present application, the control system is further configured to:

[0221] When RH ≤ the first preset humidity RH1, control the air guiding plate to rotate to a plane where the air guiding plate is located does not pass through the selectively breathable and moisture-permeable membrane.

[0222] As a further improvement of an embodiment of the present application, the refrigeration appliance further includes a controlled atmosphere unit and a controlled atmosphere channel. The controlled atmosphere channel connects the controlled atmosphere unit and the compartment and supplies fresh-keeping gas into the compartment.

[0223] As a further improvement of an embodiment of the present application, the control system is further configured to:

[0224] When RH ≤ the first preset humidity RH1, control the air supply amount of the oxygen generation module to the compartment to be Vq1, and control the air guiding plate to rotate to be parallel to the selectively breathable and moisture-permeable membrane.

[0225] As a further improvement of an embodiment of the present application, the control system is further configured to:

[0226] When RH ≤ the first preset humidity RH1, control the air supply amount of the oxygen generation module to the compartment to be Vq2, and control the air guiding plate to rotate to a plane where the intersection line of the air guiding plate and the cover plate is located on a side of the selectively breathable and moisture-permeable membrane away from the first wall;

[0227] Wherein, Vq2 > Vq1.

[0228] As a further improvement of an embodiment of the present application, the control system is further configured to:

[0229] When RH > the first preset humidity RH1, control the air supply amount of the refrigeration system to the inside of the fresh-keeping container to be Vf1, and control the air supply amount of the oxygen generation module to the compartment to be Vq3;

[0230] When the second preset humidity RH2 < RH ≤ RH1, control the air supply amount of the refrigeration system to the inside of the fresh-keeping container to be Vf2, and control the air supply amount of the oxygen generation module to the compartment to be Vq4;

[0231] When RH≤RH2, the air supply volume of the refrigeration system to the inside of the preservation container is controlled to be Vf3, and the air supply volume of the oxygen generation module to the compartment is controlled to be Vq4.

[0232] Among them, Vf1>Vf2>Vf3, Vq3>Vq4.

[0233] As a further improvement of one embodiment of this application, the target oxygen concentration inside the preservation container is greater than the oxygen concentration in the air, and the oxygen concentration in the preservation gas is greater than the oxygen concentration in the air; the selectively breathable and moisture-permeable membrane is configured to allow oxygen from the outside of the preservation container to enter the preservation container.

[0234] As a further improvement of one embodiment of this application, the target oxygen concentration inside the preservation container is lower than the oxygen concentration in the air, and the oxygen concentration in the preservation gas is lower than the oxygen concentration in the air; the selectively breathable and moisture-permeable membrane is configured to allow oxygen to escape from the preservation container.

[0235] Compared with the prior art, the refrigeration appliance of this application can not only cool the inside of the preservation container, but also regulate the oxygen concentration inside. Moreover, it can control the angle of the air guide plate relative to the selectively permeable membrane according to the humidity (RH) inside the preservation container, so as to control whether the cold air supplied from the air inlet to the preservation container blows directly onto the selectively permeable membrane, thereby achieving the regulation of the humidity inside the preservation container and keeping the humidity inside the preservation container within a preset range.

[0236] The purpose of this application is to provide a refrigeration device to solve the problem of poor preservation effect of existing refrigeration devices.

[0237] To achieve one of the above-mentioned objectives, one embodiment of this application provides a refrigeration device, comprising:

[0238] Room;

[0239] Controlled atmosphere unit;

[0240] Controlled atmosphere passageway, connecting the controlled atmosphere unit and the compartment;

[0241] The modified atmosphere container is housed within a compartment. The modified atmosphere channel allows the preservative gas from the modified atmosphere unit to flow into the compartment and outside the modified atmosphere container. The modified atmosphere container is equipped with a selectively permeable membrane to allow oxygen to pass through.

[0242] As a further improvement of one embodiment of this application, the target oxygen concentration inside the modified atmosphere container is greater than the oxygen concentration in the air, and the oxygen concentration in the preservative gas is greater than the oxygen concentration in the air; the selectively permeable membrane is configured to allow oxygen located outside the modified atmosphere container in the compartment to enter the modified atmosphere container.

[0243] As a further improvement of one embodiment of this application, the target oxygen concentration in the modified atmosphere container is less than the oxygen concentration in the air, and the oxygen concentration in the preservative gas is less than the oxygen concentration in the air; the selectively permeable membrane is configured to allow oxygen to escape from the modified atmosphere container.

[0244] As a further improvement of one embodiment of this application, the modified atmosphere container is also provided with a moisture-permeable membrane to allow moisture in the modified atmosphere container to drain out.

[0245] As a further improvement of one embodiment of this application, the refrigeration equipment includes a preservation cylinder, the preservation cylinder surrounds a compartment, the preservation cylinder is provided with a modified atmosphere inlet, and the modified atmosphere channel is connected to the modified atmosphere inlet.

[0246] The modified atmosphere container includes a drawer and a lid, with a selectively breathable membrane disposed on the lid and a modified atmosphere inlet located on the side of the lid away from the drawer.

[0247] As a further improvement of one embodiment of this application, the food storage container has a first opening, the drawer has a second opening, the cover plate closes the second opening, the second opening has a different opening direction from the first opening, the food storage container includes a first wall disposed opposite to the first opening, and a modified atmosphere inlet is disposed on the first wall.

[0248] As a further improvement of one embodiment of this application, a guide rib is provided on the side of the cover away from the drawer, and the guide rib is provided corresponding to the modified atmosphere inlet to guide the preservation gas to the selectively breathable membrane.

[0249] As a further improvement of one embodiment of this application, the food storage container has a first opening, and the drawer has a door panel for opening or closing the first opening.

[0250] As a further improvement of one embodiment of this application, the refrigeration equipment includes a preservation cylinder, which surrounds a compartment. An airflow channel is provided in the preservation cylinder, and an air outlet is provided on the inner wall of the preservation cylinder. The air outlet is provided with a selectively permeable membrane, and the modified atmosphere channel connects the modified atmosphere unit and the compartment through the airflow channel and the air outlet.

[0251] As a further improvement of one embodiment of this application, the refrigeration equipment also includes a refrigeration system and a cooling supply channel, the cooling supply channel connecting the refrigeration system and the controlled atmosphere container and supplying cold air to the interior of the controlled atmosphere container.

[0252] As a further improvement of one embodiment of this application, the refrigeration equipment includes a preservation cylinder, which surrounds a compartment. The modified atmosphere container includes a drawer and a cover. The cover is provided with an air inlet. The preservation cylinder is provided with a pipe connector and an air outlet. The drawer is provided with a return air outlet. One end of the pipe connector is inserted into the air inlet, and the other end extends out of the preservation cylinder and is connected to the cooling channel. The return air outlet and the air outlet are connected.

[0253] Compared with the prior art, the refrigeration equipment of this application supplies preservation gas to the interior of the compartment through a controlled atmosphere channel. Through a selectively permeable membrane, oxygen in the preservation gas supplied to the interior of the compartment can enter the interior of the controlled atmosphere container, so that the oxygen concentration inside the controlled atmosphere container is greater than the oxygen concentration in the air, creating an oxygen-rich environment, or the oxygen inside the controlled atmosphere container can be discharged through the selectively permeable membrane, thereby making the oxygen concentration inside the controlled atmosphere container less than the oxygen concentration in the air, creating an oxygen-deficient environment. Both oxygen-rich and oxygen-deficient environments can improve the preservation effect on food.

[0254] The purpose of this application is to provide a refrigeration appliance and its control method to solve the problem of how to improve the preservation effect of existing refrigeration appliances.

[0255] To achieve one of the above-mentioned objectives, one embodiment of this application provides a control method for a refrigeration appliance, comprising:

[0256] Control the refrigeration system to start and supply air to the room;

[0257] The controlled atmosphere unit is activated to deliver preservative gas into the compartment;

[0258] The air supply of the controlled atmosphere unit and the air volume of the refrigeration system are gradually reduced in a stepwise manner.

[0259] As a further improvement to one embodiment of this application, the control method for a refrigeration appliance includes:

[0260] Based on the operating time, the air supply of the controlled atmosphere unit and the air volume of the refrigeration system are gradually reduced in a stepwise manner.

[0261] Compared with the prior art, the refrigeration appliance and its control method of this application can regulate the oxygen concentration inside the compartment by controlling the supply of preservative gas to the compartment through the controlled atmosphere unit, thereby improving the preservation effect inside the compartment. Furthermore, by controlling the gas supply of the controlled atmosphere unit and the air volume of the refrigeration system to gradually decrease in a stepwise manner, the influence of the air volume of the refrigeration system on the preservative gas delivered by the controlled atmosphere unit can be reduced, thereby preventing the oxygen concentration in the compartment from deviating from its preset oxygen-rich environment or its preset oxygen-deficient environment, and further improving the preservation effect of the compartment.

[0262] The term “comprise” as used herein, and variations thereof such as “comprises”, “comprised”, “comprising”, “including”, and “containing”, do not exclude other features, components, elements, or steps unless the context clearly requires otherwise. Attached Figure Description

[0263] Figure 1 is a structural schematic diagram of a refrigeration appliance according to an embodiment of this application;

[0264] Figure 2 is a schematic diagram of a partial structure of a refrigeration appliance according to an embodiment of this application;

[0265] Figure 3 is a partial cross-sectional view of the EE section line in Figure 2;

[0266] Figure 4 is a schematic diagram of a partial structure of a refrigeration appliance according to an embodiment of this application, which omits at least the shielding plate compared to Figure 2;

[0267] Figure 5 is an exploded view of a partial structure of a refrigeration appliance according to an embodiment of this application;

[0268] Figure 6 is a schematic diagram of the rear view of a food storage container and other components according to an embodiment of this application;

[0269] Figure 7 is a partial cross-sectional view of section line AA in Figure 2;

[0270] Figure 8 is a partial cross-sectional view of section line BB in Figure 2;

[0271] Figure 9 is a partial cross-sectional view of the CC section line in Figure 2;

[0272] Figure 10 is a schematic diagram of the structure of the fresh-keeping compartment, fresh-keeping cylinder, heat-insulating component, etc. of a refrigeration appliance according to an embodiment of this application;

[0273] Figure 11 is an exploded view from the rear side of the structure of the refrigeration appliance including the fresh-keeping compartment, the insulated component, and the drawer according to an embodiment of this application.

[0274] Figure 12 is an exploded view from the front side of the structure of the refrigeration appliance including the fresh-keeping compartment, the insulated component, and the drawer according to an embodiment of this application.

[0275] Figure 13 is a schematic diagram of the structure of a drawer according to an embodiment of this application;

[0276] Figure 14 is a schematic diagram of the structure of a controlled atmosphere unit according to an embodiment of this application;

[0277] Figure 15 is a cross-sectional view along the DD section line in Figure 14;

[0278] Figure 16 is a schematic block diagram of the fluid communication between the controlled atmosphere unit and two preservation containers of a refrigeration appliance according to an embodiment of this application.

[0279] Figure 17 is a structural schematic diagram of a connector according to an embodiment of this application;

[0280] Figure 18 is an exploded view of a partial structure of a refrigeration appliance according to an embodiment of this application;

[0281] Figure 19 is a flowchart of the control logic of the controller for temperature and humidity according to an embodiment of this application;

[0282] Figure 20 is a flowchart of the control logic of the controller for temperature and oxygen concentration according to an embodiment of this application;

[0283] Figure 21 is a three-dimensional structural diagram of a refrigeration appliance according to the second embodiment of this application;

[0284] Figure 22 is a three-dimensional structural diagram of the air duct cover and the food storage container according to the second embodiment of this application;

[0285] Figure 23 is a schematic diagram of the explosion in Figure 22;

[0286] Figure 24 is a rear view of Figure 22;

[0287] Figure 25 is a three-dimensional structural diagram of the food storage container from another angle according to the second embodiment of this application;

[0288] Figure 26 is a structural schematic diagram of the food storage container and modified atmosphere unit of the second embodiment of this application from another angle;

[0289] Figure 27 is a cross-sectional view along line AA in Figure 26;

[0290] Figure 28 is an enlarged schematic diagram of part B in Figure 27;

[0291] Figure 29 is an enlarged schematic diagram of part C in Figure 27;

[0292] Figure 30 is a cross-sectional view along line DD in Figure 26;

[0293] Figure 31 is a three-dimensional structural diagram of the food preservation container according to the second embodiment of this application;

[0294] Figure 32 is a schematic diagram of the structure of the food preservation container according to the second embodiment of this application, wherein the arrows indicate the flow direction of the refrigeration airflow;

[0295] Figure 33 is a schematic diagram of the structure of a food preservation container according to a variation of this application, wherein the arrows indicate the flow direction of the refrigeration airflow;

[0296] Figure 34 is a schematic diagram of the structure of a food preservation container according to a variation of this application, wherein the arrows indicate the flow direction of the refrigeration airflow;

[0297] Figure 35 is an exploded schematic diagram of the air duct cover and the food storage container according to the third embodiment of this application;

[0298] Figure 36 is a structural schematic diagram of the food storage container and modified atmosphere unit of the third embodiment of this application from another angle;

[0299] Figure 37 is a cross-sectional view along line AA in Figure 36;

[0300] Figure 38 is a cross-sectional schematic diagram of a modified embodiment of the food preservation container of this application;

[0301] Figure 39 is a cross-sectional view along line BB in Figure 36;

[0302] Figure 40 is an exploded view of a portion of the structure of a refrigeration appliance according to the fourth embodiment of this application;

[0303] Figure 41 is a schematic diagram of the structure of the food preservation container and the modified atmosphere unit according to the fourth embodiment of this application;

[0304] Figure 42 is a cross-sectional view along line AA in Figure 44;

[0305] Figure 43 is an enlarged schematic diagram of part B in Figure 45;

[0306] Figure 44 is an enlarged schematic diagram of part C in Figure 45;

[0307] Figure 45 is a structural schematic diagram of the food preservation container according to the fourth embodiment of this application;

[0308] Figure 46 is a schematic diagram of the structure of a food preservation container according to a variation of this application;

[0309] Figure 47 is a schematic diagram of the structure of a food preservation container according to a variation of this application. Detailed Implementation

[0310] The present application will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present application, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of this application.

[0311] In the various figures of this application, for ease of illustration, certain dimensions of structures or parts may be exaggerated relative to other structures or parts; therefore, they are only used to illustrate the basic structure of the subject matter of this application.

[0312] The terms used herein, such as “above,” “over,” “below,” and “under,” indicating spatial relative position, are for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. These terms may be intended to include different orientations of the device in use or operation other than those shown in the figures. For example, if the device in the figures is flipped, a unit described as being “below” or “under” another unit or feature would be “above” that unit or feature. Therefore, the exemplary term “below” can encompass both above and below orientations. The device may be oriented in other ways (rotated 90 degrees or otherwise) and the spatially related descriptive terms used herein will be interpreted accordingly.

[0313] Referring to Figure 1, the first embodiment of this application provides a refrigeration appliance 100.

[0314] In the illustration, the refrigeration appliance 100 can be specifically defined as a refrigerator, which can be a household refrigerator or a commercial refrigerator.

[0315] The basic structure of the refrigeration appliance 100 of this application will be described below. Specifically, the refrigeration appliance 100 includes a housing 10, a door 20, and a refrigeration system.

[0316] The housing 10 includes a shell 11, an inner liner 12, and an insulation layer. The shell 11 forms part of the exterior of the refrigeration appliance 100. In the embodiment shown in the drawings, the shell 11 is generally a box-like structure with a back panel, a top panel, a bottom panel, a left side panel, and a right side panel. The inner liner 12 is fitted inside the shell 11 and spaced apart from the shell 11 to create a space between the shell 11 and the inner liner 12. The insulation layer fills the space; specifically, the insulation layer may include insulation board and foam material.

[0317] The inner liner 12 forms a compartment 101, which may be a storage temperature setting, specifically a freezer, a refrigerator, or a variable temperature compartment, preferably a refrigerator.

[0318] The container 10 may also have a second compartment 103, which may be, for example, a fresh-keeping compartment that is separate from the compartment 101.

[0319] The number of doors 20 is set to one or more, each door 20 being movably connected to the front side of the enclosure 10 and used to open and close the compartment 101. For example, when the door 20 opens the compartment 101, the user can take or put items into the compartment 101; when the door 20 closes the compartment 101, the compartment 101 is essentially closed, the user cannot take or put items in, and even the low-temperature gas inside the compartment 101 cannot enter or exit the compartment 101 through the seam between the door 20 and the enclosure 10, thereby achieving low-temperature storage.

[0320] The refrigeration system includes a refrigerator for providing cooling capacity to the refrigerated appliance 100 in order to maintain a low-temperature storage environment in compartment 101 and the second compartment 103.

[0321] The specific structure of the refrigeration system can be implemented in various ways in this field. For example, in one embodiment, the refrigeration system can be configured as a thermoelectric refrigeration system, and its cooler can be configured as a semiconductor refrigeration chip; in another embodiment, the refrigeration system can be configured as a vapor compression refrigeration system, and its cooler can be configured as an evaporator. In addition, it also includes a compressor, a condenser, a throttling element, etc. The compressor, condenser, throttling element and evaporator are connected in series to form a circulation pipeline. Under the action of the compressor, the refrigerant flows in the circulation pipeline and realizes heat absorption and heat release based on phase change, and then exchanges heat with the air at the evaporator to produce the cold air required by the first chamber 101 and the second chamber 103.

[0322] In this application, the cooling method of compartment 101 and the second compartment 103 is air cooling mode. Currently, in other variations, direct cooling mode can also be used.

[0323] The enclosure 10 is also equipped with a refrigeration chamber and a cold air duct.

[0324] The refrigerated compartment is equipped with a refrigerator. As mentioned earlier, when the refrigeration system is started, the refrigerator can exchange heat with the air inside the refrigerated compartment, so that the air inside the refrigerated compartment becomes cold air.

[0325] In an alternative embodiment, the refrigeration compartment may be located in compartment 101 or in a location other than compartment 101.

[0326] The cold air duct connects the refrigeration chamber and the compartment 101, thereby allowing cold air to circulate between the refrigeration chamber and the compartment 101, thus providing cold air to the compartment 101.

[0327] Specifically, for example, the cold air duct may include a supply air duct and a return air duct. The supply air duct connects the refrigeration chamber and the compartment 101, so that cold air can flow from the refrigeration chamber to the compartment 101 along the supply air duct; the return air duct connects the refrigeration chamber and the compartment 101, so that cold air can flow from the compartment 101 back to the refrigeration chamber along the return air duct.

[0328] Of course, with the goal of meeting the cooling needs of compartment 101, there are many feasible ways to connect the cold air duct, the cooling chamber, and compartment 101. These feasible ways have been disclosed in the field and will not be elaborated in this application.

[0329] Furthermore, for the sealed preservation container 500B in the compartment 101, the cold air in the compartment 101 is outside the preservation container 500B and exchanges heat with the first body of the preservation container 500B (e.g., the preservation tube 30B), thereby cooling the preservation container 500B.

[0330] Furthermore, the cold air duct connects the refrigeration chamber and the second compartment 103, allowing cold air from the refrigeration chamber to enter the second compartment 103, thereby cooling the second compartment 103. Additionally, for the sealed second preservation container 500 within the second compartment 103, the cold air in the second compartment 103 is outside the second preservation container 500 and exchanges heat with the second main body (e.g., drawer 40) of the second preservation container 500, thereby cooling the second preservation container 500. Optionally, referring to Figures 2 to 6, the housing 10 includes an air duct cover 13, which is assembled to the rear wall of the inner liner 12. Part or all of the refrigeration chamber and / or the cold air duct is formed between the air duct cover 13 and the rear wall of the inner liner 12.

[0331] In this application, the refrigeration appliance 100 includes a food preservation container 500B and a cooling aisle 130B.

[0332] The preservation container 500B is placed in the compartment 101. It has a first main body that is generally sealed. Several guide ribs are provided on its outer surface, and the guide ribs form a guide air duct 461B.

[0333] The cooling channel 130B forms part of the aforementioned cold air duct, specifically part of the air supply duct, and connects the refrigeration chamber and the compartment 101. The cooling channel 130B has an air inlet 131B, through which the cold air from the refrigeration chamber can flow into the compartment 101 and outside the preservation container 500B. The air inlet 131B corresponds to the guide air duct 461B, so that the cold air flowing out of the air inlet 131B can flow along the guide air duct 461B on the outer surface of the preservation container 500B, thereby cooling the preservation environment inside the preservation container 500B.

[0334] Thus, the structure of this application, by setting guide ribs on the outside of the preservation container, allows cold air to flow along the outer surface of the preservation container, which not only achieves rapid cooling of the preservation container, but also ensures uniform cooling and avoids local high temperatures inside the preservation container, while not affecting the environment inside the preservation container and avoiding drastic fluctuations in the preservation environment.

[0335] In one embodiment, the first main body of the food preservation container 500B includes a food preservation tube 30B assembled in the inner liner 12 and a door panel 50B for sealing and closing the food preservation tube 30B. A drawer 41B that is always open is provided inside the food preservation tube 30B, and the door panel 50B and the drawer 41B are fixedly installed.

[0336] Several guide ribs are provided on the outer surface of the preservation cylinder 30B, so that the cold air flowing out of the air inlet 131B can flow along the guide air duct 461B on the outer surface of the preservation cylinder 30B.

[0337] Specifically, the air inlet 131B is located on the air duct cover 13 and is higher than the top wall of the food storage container 30B.

[0338] The plurality of guide ribs include a first guide rib 4631B and a second guide rib 4632B disposed on the top wall of the preservation cylinder 30B, the first guide rib 4631B and the second guide rib 4632B being disposed opposite each other on the left and right; the guide air duct 461B is formed between the first guide rib 4631B and the second guide rib 4632B, the guide air duct 461B being directly opposite the air inlet 131B to guide the cold air to flow along the top wall of the preservation cylinder 30B in a direction away from the air inlet 131B, specifically forward.

[0339] The first guide rib 4631B and the second guide rib 4632B extend from the rear edge of the top wall of the refrigerator 30B to the front edge of the top wall of the refrigerator 30B, respectively. This allows the cold air to flow from back to front, so as to flow through as much of the outer side of the top wall of the refrigerator 30B as possible, thereby improving the cooling effect inside the refrigerator 30B.

[0340] The rear ends of the first guide rib 4631B and the second guide rib 4632B are respectively located on the outer side of the air inlet 131B in the left-right direction. That is, the rear end of the first guide rib 4631B is located on the left side of the air inlet 131B in the left-right direction, and the rear end of the second guide rib 4632B is located on the right side of the air inlet 131B in the left-right direction, thereby ensuring that the rear ends of the first guide rib 4631B and the second guide rib 4632B are not directly in front of the air inlet 131B.

[0341] The air duct 461B includes an expansion section 461Ba that is close to the air inlet 131B and a section of equal width that is relatively far away from the air inlet 131B. That is, the expansion section 461Ba is arranged at the rear relative to the section of equal width.

[0342] The width of this expansion segment 461Ba gradually increases from front to back, while the width of the equal-width segment remains constant from front to back.

[0343] Specifically, the first guide rib 4631B includes a first inclined section 4631Ba and a first straight section 4631Bb.

[0344] The first straight segment 4631Bb is located near the left edge of the food storage container 30B and extends in the front-to-back direction; the first inclined segment 4631Ba extends in an inclined manner from back to front and from right to left, and in the figure, it is illustrated as a multi-segment structure with an inclination angle different from that in the front-to-back direction.

[0345] The second guide rib 4632B includes a second inclined section 4632Ba and a second straight section 4632Bb.

[0346] The second straight segment 4632Bb is located near the right edge of the food storage container 30B and extends in the front-to-back direction; the second inclined segment 4632Ba extends in an inclined manner from back to front and from left to right, and in the figure, it is shown as a multi-segment structure with an inclination angle different from that in the front-to-back direction.

[0347] The equal-width segment is formed between the first straight segment 4631Bb and the second straight segment 4632Bb.

[0348] The expansion segment 461Ba is formed between the second inclined segment 4632Ba and the second inclined segment 4632Ba.

[0349] Preferably, at least a portion of the first inclined segment 4631Ba is configured to have an inclination angle with the front-back direction in the range of 30° to 60°.

[0350] Similarly, at least a portion of the second inclined segment 4632Ba is configured to have an inclination angle with the front-to-back direction in the range of 30° to 60°.

[0351] Of course, the specific structure of the first guide rib 4631B, the second guide rib 4632B, and the guide duct 461B is not limited to the optimal implementation described above.

[0352] More preferably, the refrigeration appliance also includes a shielding plate 15, which covers the top of the preservation cylinder 30B, and the air inlet 131B is located below the shielding plate 15. In this way, on the one hand, the preservation cylinder 30B is prevented from being exposed and affecting the appearance, and on the other hand, the key point is that the cold air flowing out of the air inlet 131B is also restricted to the area below the shielding plate 15, thereby further ensuring that the cold air can stay near the preservation cylinder 30B without excessive dissipation, and improving the refrigeration effect of the preservation container 500.

[0353] In one embodiment, as shown in the figure, an opening is formed in front of the air duct 461B, so that cold air flows forward from the gap between the preservation container 500B and the shielding plate 15, or flows to the left and right sides.

[0354] In the embodiment shown in the accompanying drawings, both the first guide rib 4631B and the second guide rib 4632B extend continuously from the rear end to the front end.

[0355] In a variation embodiment, at the equal-width section of the airflow duct 461B, the first guide rib 4631B and the second guide rib 4632B can also be configured to extend intermittently. For example, several notches can be provided in the first straight section 4631Bb, making the first straight section 4631Bb extend discontinuously; similarly, several notches can be provided in the second straight section 4632Bb, making the second straight section 4632Bb extend discontinuously. In this way, a portion of the cold air within the airflow duct 461B can be diverted to the left and right sides of the preservation container 500B through these notches, thereby further increasing the temperature uniformity within the preservation container 500B.

[0356] In addition, the guide ribs also include a number of third guide ribs 4633B disposed between the first guide rib 4631B and the second guide rib 4632B; these third guide ribs 4633B divide the expansion section 461Ba into at least two sub-ducts, and the at least two sub-ducts are arranged side by side.

[0357] The refrigeration appliance 100 may also be equipped with a first fan, which may be installed in the refrigeration compartment and / or the cooling channel 130B. The first fan may be used to drive the cold air in the refrigeration compartment to flow along the cooling channel 130B to the compartment 101.

[0358] Preferably, the first fan can operate at different speeds to adjust the airflow of the cold air.

[0359] The refrigeration appliance 100 may also be equipped with a first damper, which may be located in the cooling channel 130B between the refrigeration chamber and the air inlet 131B.

[0360] The first damper can open and close the cooling channel 130B.

[0361] Additionally, the refrigeration appliance 100 may also include a return cooling duct, which is at least partially located between the duct cover 13 and the rear wall of the inner liner 12, connecting the compartment 101 and the refrigeration chamber, so that the cold air in the compartment 101 can return to the refrigeration chamber through the return cooling duct.

[0362] The return air duct forms part of the cold air duct mentioned earlier, specifically part of the return air duct.

[0363] Furthermore, the refrigeration appliance 100 includes a second temperature sensor, which is installed on the outside of the preservation container 500B, specifically on the outside of the preservation cylinder 30B and outside the air duct 461B.

[0364] In other words, most or even all of the cold air on the outer surface of the food preservation container 500B will not flow through the second temperature sensor. Thus, based on the temperature sensing results at this location, the accuracy of temperature control inside the food preservation container 500B can be greatly improved, avoiding food preservation degradation caused by local high temperatures.

[0365] Thus, by setting a guide air duct 461B on the outside of the food preservation container 500B, cold air can flow along the outer surface of the food preservation container 500B, thereby achieving rapid cooling of the food preservation container 500B. It can also ensure uniform cooling and avoid local high temperatures inside the food preservation container 500B. On this basis, a temperature sensor is placed outside the food preservation container 500B to detect the internal temperature of the food preservation container 500B. The temperature sensor is located outside the guide air duct 461B, so on the one hand, the cold air will not directly contact the temperature sensor, and on the other hand, the temperature sensor is not within the area of ​​the food preservation container 500B through which the cold air flows. This can greatly reduce the temperature detection deviation (e.g., underestimation) caused by the direct blowing of cold air, thereby improving the accuracy of temperature monitoring results, ensuring the cooling effect at all locations inside the food preservation container 500B, and avoiding food preservation deterioration caused by local high temperatures.

[0366] The airflow duct 461B can be implemented in various ways, such as a traditional cylindrical duct structure. Preferably, as shown in the figure, the outer surface of the preservation container 500B is provided with several guide ribs, which together form at least a portion of the airflow duct 461B. Thus, by providing guide ribs on the outside of the preservation container, cold air can flow along the outer surface of the container, achieving rapid cooling of the container while maintaining a simple structure and easy installation.

[0367] In a preferred embodiment, the second temperature sensor is located at the rear left corner of the top wall of the preservation container 30B. This, combined with the proximity of the controlled atmosphere inlet 424B to the second temperature sensor, allows the sensor to promptly detect temperature fluctuations caused by the preservative gas introduced through the controlled atmosphere inlet 424B. This information is then promptly relayed to the controller of the refrigeration appliance to adjust the cooling airflow, thereby improving the temperature stability within the preservation container 500B. Of course, the location of the second temperature sensor is not limited to this.

[0368] More preferably, referring to Figure 4, the second temperature sensor is specifically disposed on the outside of the food preservation container 30B; the outer wall of the food preservation container 30B is provided with a mounting groove 420B, which has a detection port communicating with the interior of the food preservation container 30B. The second temperature sensor is fixedly installed in the mounting groove 420B, with its detection end located at the detection port; thus, the second temperature sensor can be installed on the outside of the food preservation container 30B and can detect the temperature inside the food preservation container 30B, with high sensitivity and avoiding damage to the second temperature sensor caused by condensation.

[0369] Furthermore, the preservation container 500B has a window 301B. Specifically, the window 301B is opened on the preservation tube 30B and connects the interior of the preservation container 500B with the air duct 461B.

[0370] The window 301B is sealed with a breathable membrane that prevents water vapor from passing through it unidirectionally into the interior of the food storage container 30B. This allows water vapor inside the food storage container 30B to pass through the breathable membrane into the air duct 461B, preventing excessive humidity and condensation inside the container. Simultaneously, the cool air in the air duct 461B accelerates the airflow across the surface of the breathable membrane, further promoting the escape of water vapor from the food storage container 30B.

[0371] In one embodiment, the window 301B is more specifically located between the first straight section 4631Bb and the second straight section 4632Bb; of course, this application is not limited to this, and the window 301 can also be specifically opened in other positions of the preservation container 500B, such as the left or right wall of the preservation tube 30B.

[0372] Furthermore, as mentioned above, the gas-barrier and moisture-permeable membrane is configured to allow water vapor to pass through the interior of the preservation container 30B in one direction, so as to avoid excessive humidity inside the preservation container 30B, for example, the humidity inside the preservation container 30B does not exceed 85%; while in a modified embodiment, the gas-barrier and moisture-permeable membrane is configured to allow water vapor to enter the interior of the preservation container 30B in one direction, so that the humidity inside the preservation container 30B is maintained above a certain lower limit value, thus meeting the different usage requirements of different humidity inside the preservation container 30B.

[0373] At the same time, the gas barrier and moisture-permeable membrane can block gas from passing through. For example, gas exchange between the inside and outside of the food storage container 30B cannot be achieved through the gas barrier and moisture-permeable membrane.

[0374] The food preservation container 500B is also equipped with a grid plate; the air-barrier and moisture-permeable membrane is clamped and fixed by the grid plate and the food preservation cylinder 30B.

[0375] The grating plate has hooks around its perimeter, which can be snapped into the slots around the window 301B of the food storage container 30B to securely install the grating plate and the food storage container 30B. Of course, the installation method of the grating plate is not limited to the snap-fit ​​method.

[0376] Furthermore, the food preservation container 500B may be equipped with a first humidity sensor and / or a first gas concentration sensor.

[0377] The first humidity sensor is used to sense the humidity value S1 inside the food preservation container 500B.

[0378] The first gas concentration sensor is used to sense the target gas concentration P1, such as oxygen concentration, inside the food preservation container 500B.

[0379] The controller of the refrigeration appliance 100 is connected to the first gas concentration sensor, the second temperature sensor, and the first humidity sensor, and is used to control the start and stop of the atmosphere control unit 60, the start and stop of the refrigeration unit, the opening and closing of the first damper, and the start and stop of the first fan according to the target gas concentration P1, the internal temperature T1, and the humidity value S1.

[0380] For example, when the first humidity sensor detects that the humidity value S1 reaches or exceeds the humidity threshold A10, the controller controls the first fan to start from the stopped state to supply cold air to the outside of the preservation container 500B, thereby using the cold air to accelerate the moisture permeability of the air-barrier and moisture-permeable membrane of the preservation container 500B.

[0381] For example, when the first humidity sensor detects that the humidity value S1 is within the first humidity range A20 to A30 (A20 ≥ A10), the controller controls the first fan to operate at a first speed. When the first humidity sensor detects that the humidity value S1 is within the second humidity range A40 to A50 (A40 ≥ A30), the controller controls the first fan to operate at a second speed, which is greater than the first speed. That is, when the humidity value S2 exceeds the humidity threshold, the larger the humidity value S2, the higher the speed of the first fan, thereby maintaining the stability of the humidity value S2.

[0382] Next, in addition to the preservation container 500B described above, the refrigeration appliance 100 also has another preservation container that is different from the preservation container 500B. For easy distinction, the other preservation container will be referred to as the second preservation container 500 below.

[0383] Specifically, the refrigeration appliance 100 shown in the figure also includes a preservation cylinder 30, a sealed second preservation container 500, and a cooling channel 130.

[0384] The preservation container 30 is assembled in the inner liner 12, which encloses a compartment 103 with an open front, and the second preservation container 500 is disposed in the compartment 103.

[0385] The second food storage container 500 has a second main body, which is configured as a drawer 40 movably housed within the food storage tube 30. The drawer 40 includes a box body 41 and a cover 42, wherein: the box body 41 has an upper access opening, that is, the user can access the contents of the box body 41 through the access opening; the cover 42 is movably fitted at the access opening and is used to open and close the access opening.

[0386] The refrigeration appliance 100 also has a door panel 50, which is movably disposed at the opening, is fixedly connected to the box body 41, and is used to open and close the compartment 103.

[0387] Referring to Figures 7 to 13, the outer surface of drawer 40 is provided with several guide ribs, which form a guide air channel 461. In other words, the outer side of the second preservation container 500 is provided with a guide air channel 461.

[0388] The cooling channel 130 is located on the outside of the second preservation container 500 and forms part of the cold air duct mentioned above. Specifically, it forms part of the air supply duct and connects the refrigeration chamber and the compartment 103. The cooling channel 130 has an air inlet 131 exposed in the compartment 103. The cold air from the refrigeration chamber can flow through the air inlet 131 into the compartment 103 and outside the second preservation container 500 (i.e., outside the drawer 40). The air inlet 131 corresponds to the guide air duct 461 so that the cold air flowing out of the air inlet 131 can flow along the guide air duct 461 on the outer surface of the second preservation container 500 (i.e., the outer surface of the drawer 40), thereby cooling the preservation environment inside the drawer 40.

[0389] Thus, the structure of this application, by setting guide ribs on the outside of the second preservation container 500, allows cold air to flow along the outer surface of the second preservation container 500. This not only enables rapid cooling of the second preservation container 500, but also ensures uniform cooling and avoids local high temperatures inside the second preservation container 500. At the same time, it does not affect the environment inside the second preservation container 500 and avoids drastic fluctuations in the preservation environment.

[0390] Furthermore, by setting up a compartment 103 in the preservation cylinder 30 and placing the second preservation container 500 inside the preservation cylinder 30, the flow range of cold air can be further restricted, thereby improving the refrigeration efficiency inside the second preservation container 500.

[0391] The cooling aisle 130 is at least partially located between the air duct cover 13 and the rear wall of the inner liner 12, and its air inlet 131 is opened on the food storage container 30, specifically located on the upper part of the rear wall of the food storage container 30, which may be higher than the cover 42 of the drawer 40.

[0392] In a preferred embodiment, the air inlet 131 is located on the upper part of the rear wall 30c of the food storage container 30, specifically higher than the cover 42 of the drawer 40. It can be understood that the rear wall 30c is a container wall opposite to the opening of the food storage container 30.

[0393] Thus, corresponding to the position of the air inlet 131, the cooling channel 130 also has an air inlet interface 132 opened on the air duct cover 13. The air inlet interface 132 is directly opposite and connected to the air inlet 131. In this way, the cold air in the cooling channel 130 flows between the air duct cover 13 and the rear wall of the inner liner 12, and then passes through the air inlet interface 132 and the air inlet 131 in sequence, and flows forward into the compartment 103.

[0394] Of course, in alternative embodiments, the air inlet 131 may also be located in the middle of the top wall of the food storage container 30 or in other locations.

[0395] For example, in a variation embodiment, the air inlet 131 may also be located on the top wall 30a of the preservation cylinder 30, specifically in the middle of the top wall 30a; correspondingly, the cooling channel 130 has an air inlet 132 opened on the air duct cover 13 and a channel section located between the upper side of the preservation cylinder 30 and the upper insulation plate 31a. The air inlet 132 and the rear end of the channel section are directly opposite and connected, and the front end of the channel section is directly opposite and connected to the air inlet 131. In this way, the cold air in the cooling channel 130 flows between the air duct cover 13 and the rear wall of the inner liner 12, and then passes through the air inlet 132, the channel section and the air inlet 131 in sequence, and flows downward into the preservation cylinder 30.

[0396] Of course, the location of the air inlet 131 and the other cooling channels 130 that are adapted to it can be implemented in other ways, not limited to the two situations mentioned above.

[0397] The refrigeration appliance 100 may also be equipped with a second fan, which may be installed in the refrigeration compartment and / or the cooling channel 130. The second fan may be used to drive the cold air in the refrigeration compartment to flow into the compartment 103 along the cooling channel 130.

[0398] Preferably, the second fan can operate at different speeds to adjust the airflow of the cold air.

[0399] The refrigeration appliance 100 may also be equipped with a second damper, which may be located in the cooling channel 130 between the refrigeration chamber and the air inlet 131.

[0400] The second damper can open and close the cooling channel by 130.

[0401] In addition, the refrigeration appliance 100 may also include a second return cold air duct, which is at least partially located between the duct cover 13 and the rear wall of the inner liner 12, and connects the compartment 103 and the refrigeration chamber, so that the cold air in the compartment 103 can return to the refrigeration chamber through the second return cold air duct.

[0402] The second cold aisle forms part of the cold air duct mentioned earlier, specifically part of the return air duct.

[0403] In one embodiment, the second cold air duct includes a return air inlet 133 on the preservation cylinder 30. The cold air in the preservation cylinder 30 enters the second cold air duct through the return air inlet 133 and eventually returns to the refrigeration chamber.

[0404] The location of the return air vent 133 can be chosen in several ways. For example, the return air vent 133 can be located on the lower part of the rear wall of the food storage container 30, specifically below the bottom wall of the drawer 40's body 41; or, for another example, the return air vent 133 can be located in the middle of the bottom wall of the food storage container 30. However, the location of the return air vent 133 is not limited to these.

[0405] Furthermore, the box 41 is accommodated in the food storage container 30 by pushing and pulling back and forth. For example, when the box 41 located inside the food storage container 30 is pulled forward, the box 41 moves forward through the opening and leaves the food storage container 30, allowing the user to take out or put in items; while when the box 41 located outside the food storage container 30 is pushed backward, the box 41 moves backward through the opening and enters the food storage container 30.

[0406] The cover plate 42 is movably connected to the food storage container 30, and: when the container body 41 is pulled out of the food storage container 30, the cover plate 42 is suspended and supported on the food storage container 30; when the container body 41 is pushed into the food storage container 30, the cover plate 42 is sealed and fastened at the opening of the container body 41.

[0407] For example, the left and right sides of the cover plate 42 are provided with outwardly extending protrusions 411, and the left wall 30b and right wall 30d of the preservation cylinder 30 are provided with limit hooks 32, and the protrusions 411 are inserted into the limit hooks 32.

[0408] When the container 41 is housed inside the food storage container 30, the door panel 50 closes the opening of the food storage container 30, and the container 41 is in the housed state. The four edges of the cover plate 42 are sealed and fitted to the upper edge of the container 41. When the container 41 is completely removed from the food storage container 30, the door panel 50 opens the opening of the food storage container 30, and the container 41 is in the withdrawn state. The protrusion 411 engages with the limiting hook 32, so that the cover plate 42 is suspended and supported on the food storage container 30 through the engagement of the protrusion 411 and the limiting hook 32.

[0409] When the box 41 changes from the receiving state to the withdrawing state, or vice versa, the protrusion 411 remains within the limiting hook 32 to restrict the cover 42 from moving forward or backward with the box 41.

[0410] Furthermore, on each of the left and right sides of the container 41, two protruding posts 411 are arranged in a front-to-back pattern. On each of the left and right sides of the food storage container 30, two limiting hooks 32 are provided that are adapted to the two protruding posts 411. The limiting hook 32 that is in front is higher than the limiting hook 32 that is behind. In this way, when the container 41 is in the pulled-out state, each protruding post 411 is engaged in the corresponding limiting hook 32, and the cover plate 42 is suspended and supported on the food storage container 30 in an inclined state with the front end higher and the rear end lower. With this arrangement, when the container 41 is pushed into the food storage container 30, it can enter under the cover plate 42 more smoothly, avoiding interference and jamming.

[0411] Furthermore, the upper edge of the box body 41 is provided with rollers, and the cover plate 42 is provided with an upward groove 421.

[0412] When the box 41 is in the receiving state, the roller is embedded in the groove 421; when the box 41 changes from the receiving state to the withdrawn state, or vice versa, the roller is outside the groove 421 and rolls along the cover plate 42. This facilitates the relative movement between the box 41 and the cover plate 42.

[0413] Here, it is understood that the positions of the roller and the matching groove 421 can be interchanged, that is, the groove 421 can be provided on the upper edge of the box body 41 and the roller can be provided on the cover plate 42; similarly, the positions of the protrusion 411 and the limiting hook 32 can be interchanged, that is, the limiting hook 32 can be provided on the left and right sides of the cover plate 42 and the protrusion 411 can be provided on the preservation tube 30.

[0414] In one embodiment, the refrigeration appliance 100 also includes a door panel 50.

[0415] The door panel 50 is fixedly connected to the box body 41. It can move synchronously with the box body 41 and can seal the opening of the food storage container 30. In other words, the food storage container 30 and the door panel 50 together enclose a roughly sealed compartment 103.

[0416] To improve the cooling effect in compartment 103, the refrigeration appliance 100 also includes an insulation component 31, which surrounds the outside of the food storage container 30. This reduces the heat exchange between the cold air inside the food storage container 30 and the external compartment 101 where the food storage container 30 is located, thereby maximizing the cooling efficiency and temperature stability inside the drawer 40.

[0417] The insulation component 31 includes an upper insulation plate 31a, a left insulation plate 31b, a right insulation plate 31d, a rear insulation plate 31c, and a rear insulation plate 31e, located on the upper, left, right, rear, and lower sides of the food storage container 30, respectively. Preferably, the insulation component 31 can be integrally formed, or it can be separately formed and assembled together as shown in the figure.

[0418] Optionally, the chemical composition of the insulation component 31 can be polyurethane board, polystyrene foam board (EPS), extruded polystyrene foam (XPS), etc. Of course, it is not limited to these, and any insulation material known in the art can be used.

[0419] The guide ribs corresponding to the position of the air inlet 131 include a first guide rib 4631 and a second guide rib 4632 disposed on the cover plate 42, with the first guide rib 4631 and the second guide rib 4632 disposed opposite to each other; the guide air duct 461 is formed between the first guide rib 4631 and the second guide rib 4632, and the guide air duct 461 is directly opposite the air inlet 131 to guide the cold air to flow along the cover plate 42 in a direction away from the air inlet 131, specifically forward.

[0420] The first guide rib 4631 and the second guide rib 4632 extend from the rear edge of the cover plate 42 to the front edge of the cover plate 42, thereby allowing cold air to flow from back to front, so as to flow through as much of the outside of the drawer 40 as possible, thereby improving the cooling effect inside the drawer 40.

[0421] The rear ends of the first guide rib 4631 and the second guide rib 4632 are respectively located on the outer side of the air inlet 131 in the left and right directions.

[0422] The airflow duct 461 includes an expansion section 461a near the air inlet 131, which gradually increases in width from front to back; the airflow duct 461 also includes a second equal-width section relatively far from the air inlet 131, which has a relatively constant width from front to back.

[0423] That is, the expansion section 461a is arranged at the rear relative to the second equal-width section.

[0424] Specifically, the first guide rib 4631 includes a first inclined section 4631a and a first straight section 4631b.

[0425] The first straight segment 4631b is located near the left edge of the cover plate 42 and extends in the front-back direction; the first inclined segment 4631a extends in an inclined manner from back to front and from right to left, and in the figure, it is illustrated as a multi-segment structure with an inclination angle different from that in the front-back direction.

[0426] The second guide rib 4632 includes a second inclined section 4632a and a second straight section 4632b.

[0427] The second straight segment 4632b is located near the right edge of the preservation container 30 and extends in the front-to-back direction; the second inclined segment 4632a extends in an inclined manner from back to front and from left to right, and in the figure, it is shown as a multi-segment structure with an inclination angle different from that in the front-to-back direction.

[0428] The second equal-width segment is formed between the first straight segment 4631b and the second straight segment 4632b.

[0429] The expansion segment 461a is formed between the second inclined segment 4632a and the second inclined segment 4632a.

[0430] Preferably, at least a portion of the first inclined segment 4631a is configured to have an inclination angle with the front-back direction in the range of 30° to 60°.

[0431] Similarly, at least a portion of the second inclined segment 4632a is configured to have an inclination angle with the front-rear direction in the range of 30° to 60°.

[0432] Of course, the specific structure of the first guide rib 4631, the second guide rib 4632, and the guide duct 461 is not limited to the optimal implementation described above.

[0433] Furthermore, a second airflow duct 462 is provided between the drawer 40 and the door panel 50. In this way, the cold air entering the refrigerator 30 first flows forward under the guidance of the airflow duct 461, then flows downward in the second airflow duct 462, and finally flows backward through the bottom wall of the drawer 40 to reach the return air vent 133. This can increase the flow path of the cold air in the refrigerator 30, thereby providing as much cooling as possible to the inside of the drawer 40.

[0434] In the embodiment shown in the accompanying drawings, both the first guide rib 4631 and the second guide rib 4632 extend continuously from the rear end to the front end. In a variant embodiment, the first guide rib 4631 and the second guide rib 4632 can also be configured to extend intermittently. For example, several notches are provided in the first straight section 4631b, making the first straight section 4631b extend discontinuously; several notches are provided in the second straight section 4632b, making the second straight section 4632b extend discontinuously. In this way, a portion of the cold air within the airflow duct 461 can be diverted to the left and right sides of the drawer 40 through these notches, thereby further increasing the temperature uniformity within the drawer 40.

[0435] Next, the refrigeration appliance 100 includes a first temperature sensor, which is installed on the drawer 40 and located outside the airflow duct 46. In other words, most or even all of the cold air in the refrigerator 30 will not flow through the first temperature sensor. Thus, based on the temperature sensing results at this location, the accuracy of temperature control inside the drawer 40 can be greatly improved, avoiding food spoilage caused by localized high temperatures.

[0436] In a preferred embodiment, the first temperature sensor is located on the cover plate 42 and outside the airflow duct 461, that is, outside the several airflow guide ribs. In other words, most or even all of the cold air on the outer surface of the second preservation container 500 will not flow past the first temperature sensor.

[0437] Thus, by setting a guide air duct 461 outside the second preservation container 500, cold air can flow along the outer surface of the second preservation container 500, thereby achieving rapid cooling of the second preservation container 500. It can also ensure uniform cooling and avoid local high temperatures inside the second preservation container 500. On this basis, a first temperature sensor is set outside the second preservation container 500 to detect the internal temperature of the second preservation container 500. The first temperature sensor is located outside the guide air duct 461, so on the one hand, the cold air will not directly contact the first temperature sensor, and on the other hand, the first temperature sensor is not within the area of ​​the second preservation container 500 through which the cold air flows. This can greatly reduce the temperature detection deviation (e.g., lower than expected) caused by the direct blowing of cold air, thereby improving the accuracy of temperature monitoring results, ensuring the cooling effect at all locations inside the second preservation container 500, and avoiding preservation deterioration caused by local high temperatures.

[0438] The airflow duct 461 can be implemented in various ways, such as a traditional cylindrical structure. Preferably, as shown in the figure, the outer surface of the second preservation container 500 is provided with several guide ribs, which together form at least a portion of the airflow duct 461. Thus, by providing guide ribs on the outside of the second preservation container 500, cold air can flow along its outer surface, achieving rapid cooling of the second preservation container 500 while maintaining a simple structure and easy installation.

[0439] Of course, the setting of the first temperature sensor is not limited to the cover plate 42, but can also be changed to other locations outside the air duct 461.

[0440] More preferably, the outer wall of the drawer 40 is provided with a mounting groove 420, and the mounting groove 420 has a detection port 422 that communicates with the interior of the drawer 40. The first temperature sensor is fixedly installed in the mounting groove 420, and its detection end is located at the detection port 422; thus, the first temperature sensor can be installed on the outside of the drawer 40 and perform temperature detection on the inside of the drawer 40 with high sensitivity.

[0441] To further improve sensitivity and accuracy, a surrounding plate 423 is also provided on the outer wall of drawer 40. The surrounding plate 423 surrounds the mounting groove 420 and extends from the outer wall of drawer 40 to the inner wall of the food storage container 30. In this way, even if a small amount of cold air flows out from the air duct 46, for example, from the second air guide rib 4632 to the right towards the first temperature sensor, this portion of cold air will not come into excessive contact with the first temperature sensor due to the obstruction of the surrounding plate 423, thereby avoiding underestimation of the temperature due to direct cold air blowing.

[0442] The enclosure 423 protrudes from the outer surface of the second preservation container 500 compared to the several guide ribs. That is, the protrusion height of the enclosure 423 to the outer surface of the second preservation container 500 is greater than the protrusion height of the several guide ribs to the outer surface of the second preservation container 500.

[0443] Specifically, the upper edge of the enclosure 423 is higher than the upper edge of several guide ribs, and it can almost contact the inner wall of the preservation cylinder 30, or have a slight gap with the inner wall of the preservation cylinder 30, so as to block the cold air from contacting the first temperature sensor as much as possible.

[0444] Next, drawer 40 has a window that connects the interior of drawer 40 to the air duct 461. The window is sealed with a breathable membrane 43, which is configured to allow water vapor to escape unidirectionally from the interior of drawer 40. This allows water vapor inside drawer 40 to pass through the breathable membrane 43 into the air duct 461, preventing excessive humidity and condensation inside drawer 40. Simultaneously, the cool air in the air duct 461 accelerates the airflow on the surface of the breathable membrane 43, further promoting the escape of water vapor from drawer 40.

[0445] In one embodiment, the window is specifically opened on the cover plate 42, more specifically, located between the first straight section 4631b and the second straight section 4632b; of course, this application is not limited to this, and the window may also be specifically opened in other positions of the drawer 40, such as the front wall of the box body 41.

[0446] Furthermore, as mentioned above, the gas-barrier and moisture-permeable membrane 43 is configured to allow water vapor to pass through the interior of the drawer 40 in one direction, so as to avoid excessive humidity inside the drawer 40, for example, the humidity inside the drawer 40 does not exceed 85%; while in a modified embodiment, the gas-barrier and moisture-permeable membrane 43 is configured to allow water vapor to enter the interior of the drawer 40 in one direction, so that the humidity inside the drawer 40 is maintained above a certain lower limit value, thus meeting the different usage requirements of different humidity inside the drawer 40.

[0447] At the same time, the gas-barrier and moisture-permeable membrane 43 can block gas from passing through, for example, gas exchange between the inside and outside of the drawer 40 cannot be carried out through the gas-barrier and moisture-permeable membrane 43.

[0448] The drawer 40 is also equipped with a grid plate 44; the air-barrier and moisture-permeable membrane 43 is clamped and fixed by the grid plate 44 and the cover plate 42.

[0449] Hooks are provided around the grating plate 44, which can be snapped into the slots around the window of the cover plate 42 to achieve fixed installation of the grating plate 44 and the cover plate 42.

[0450] Furthermore, a second humidity sensor can be installed inside the drawer 40 to sense the humidity value S2 inside the second preservation container 500 (drawer 40); the controller of the refrigeration appliance 100 controls the operation of the second fan according to the humidity value, including controlling the start, stop and speed of the second fan.

[0451] For example, when the second humidity sensor detects that the humidity value S2 reaches or exceeds the humidity threshold A1, the controller controls the second fan to start from the stopped state to supply cold air to the outside of the drawer 40, thereby using the cold air to accelerate the moisture permeability of the air-barrier and moisture-permeable membrane 43.

[0452] For example, when the second humidity sensor detects that the humidity value S2 is within the first humidity range A2 to A3 (A2 ≥ A1), the controller controls the second fan to operate at the first speed. When the second humidity sensor detects that the humidity value is within the second humidity range A4 to A5 (A4 ≥ A3), the controller controls the second fan to operate at a second speed, which is greater than the first speed. That is, when the humidity value S2 exceeds the humidity threshold, the larger the humidity value S2, the higher the speed of the second fan, thereby maintaining the stability of the humidity value S2.

[0453] In this application, the specific structure and material of the gas barrier and moisture-permeable membrane of the food preservation container 500B and the gas barrier and moisture-permeable membrane 43 of the drawer 40 may be the same or different, and may be implemented using techniques known in the art.

[0454] For example, the following provides a specific structure of a gas-barrier and moisture-permeable membrane that can be used as either or both of the gas-barrier and moisture-permeable membranes 43 of the preservation container 500B and the drawer 40.

[0455] A gas-barrier and moisture-permeable membrane consists of a support layer and an additional layer that are bonded together.

[0456] The support layer is a porous film, and its material is at least one of polyethylene, polypropylene, polystyrene, polyethylene terephthalate, and polycaprolactam, preferably polyethylene and / or polypropylene.

[0457] The pore size of the porous film is preferably 0.02 to 10 micrometers, more preferably 0.05 to 5 micrometers, and even more preferably 0.1 to 2 micrometers; the porosity is 30% to 80%, preferably 40% to 70%; and pores with a pore size within one order of magnitude of the average pore size account for more than 50% of all pores, preferably more than 80% of all pores.

[0458] The additional layer is a dense film, specifically a polyamide layer, the surface of which is chelated with phytic acid.

[0459] The polyamide layer is obtained by interfacial polymerization of polyamines and polyacryl chlorides, and there are no particular restrictions on the types of polyamines and polyacryl chlorides.

[0460] The surface of the polyamide layer is obtained by contacting the surface of the polyamide layer with a phytic acid solution to chelate the phytic acid.

[0461] The thickness of the support layer and the polyamide additional layer is not particularly limited and can be chosen according to conventional methods in the art. For example, the thickness of the support layer is 5 to 1000 micrometers, preferably 10 to 100 micrometers; the thickness of the additional layer is 0.05 to 1 micrometer, preferably 0.1 to 0.5 micrometers.

[0462] As can be seen from the above, the difference between the fresh-keeping container 500B and the second fresh-keeping container 500 is that the fresh-keeping container 500B is roughly formed by the fresh-keeping cylinder 30B and the door panel 50B, and its outer wall is provided with a guide air duct 461B to guide the cold air in the compartment 101; while the second fresh-keeping container 500 is roughly defined by the drawer 40, and its outer wall is provided with a guide air duct 461 to guide the cold air in the compartment 103 formed by the fresh-keeping cylinder 30. However, regardless of the structure, both are sealed fresh-keeping containers with guide air ducts on their outer walls to improve the cooling effect.

[0463] In one embodiment, the refrigeration appliance 100 also has a partition frame 14, which is fixedly assembled on the inner liner 12 to separate an installation cavity in the compartment 101 enclosed by the inner liner 12. The preservation cylinder 30, the heat preservation component 31, and the preservation cylinder 30B are all fixedly assembled in the installation cavity, specifically, the preservation cylinder 30 and the preservation cylinder 30B are arranged side by side.

[0464] More specifically, the food preservation container 30 and the insulation component 31 can be fixedly installed on the divider frame 14 by means of fastening such as clips, threads, or riveting. In this way, based on the setting of the divider frame 14, on the one hand, it is convenient to fix the food preservation container 30 and / or the insulation component 31, and on the other hand, it can make the internal layout of the refrigeration appliance 100 more tidy.

[0465] In addition, to improve aesthetics, the cover plate 15 also covers the insulation component 31 and the food storage container 30 and is fixedly assembled with the divider 14, thereby increasing the aesthetics. The cover plate 15 can also be used to place items to form a shelf.

[0466] Furthermore, referring to Figures 14 to 16, the refrigeration appliance 100 has a modified atmosphere preservation function, that is, it can preserve food with a preservation gas whose gas composition or gas volume percentage is different from that of air.

[0467] Specifically, the refrigeration appliance 100 also includes a controlled atmosphere unit 60 and a first controlled atmosphere channel 70.

[0468] The modified atmosphere unit 60 is configured to generate a preservative gas, and its location is preferably outside the preservation cylinder 30 and outside the preservation container 500B.

[0469] Optionally, in one embodiment, the controlled atmosphere unit 60 may be disposed inside the inner liner 12 (e.g., in the refrigerator compartment 101), or between the inner liner 12 and the outer shell 11, or on the outside of the outer shell 11, or in the machine room; of course, these variations in location are all feasible within the technical spirit of this application.

[0470] The first modified atmosphere channel 70 connects the interior of the modified atmosphere unit 60 and the second preservation container 500 (i.e., drawer 40) so that the preservation gas generated by the modified atmosphere unit 60 can enter the interior of the drawer 40.

[0471] In one embodiment of this application, referring to Figures 6 and 9, the drawer 40 further has a modified atmosphere inlet 424 connecting the interior and exterior of the drawer 40. The first modified atmosphere channel 70 is connected to the interior of the drawer 40 via the modified atmosphere inlet 424; a surrounding panel 423 also surrounds the modified atmosphere inlet 424. Thus, the high-temperature preservative gas enters the interior of the drawer 40 at the modified atmosphere inlet 424, making the area near the modified atmosphere inlet 424 the hottest location inside the drawer 40. The first temperature sensor is positioned near the modified atmosphere inlet 424, thereby promptly detecting the high temperature inside the drawer 40, which facilitates temperature control in conjunction with the entry of the preservative gas.

[0472] As mentioned above, the first temperature sensor is located on the cover plate 42, and correspondingly, the modified atmosphere inlet 424 is located on the cover plate 42. This facilitates the setting of the first modified atmosphere channel 70. For example, if the modified atmosphere inlet 424 is located on the box body 41, the connection between the first modified atmosphere channel 70 and the modified atmosphere inlet 424 will be difficult due to the back-and-forth movement of the box body 41. However, in one embodiment of this application, the modified atmosphere inlet 424 is located on the cover plate 42, which makes it very convenient to install and connect the first modified atmosphere channel 70.

[0473] Specifically, the first modified atmosphere channel 70 includes a pipe connector 33 fixedly installed on the preservation container 30, for example, it can be integrally installed with the preservation container 30. The first end of the pipe connector 33 is exposed on the outer wall of the preservation container 30, and the second end is inserted and matched with the modified atmosphere inlet 424.

[0474] The first modified atmosphere channel 70 may also include an air tube, one end of which is connected to the modified atmosphere unit 60, and the other end is connected to the first end of the pipe connector 33.

[0475] Furthermore, corresponding to the preservation container 500B, the refrigeration appliance 100 also has a second modified atmosphere channel 70B, which connects the modified atmosphere unit 60 and the interior of the first preservation container 500B (i.e., the preservation cylinder 30B) so that the preservation gas formed by the modified atmosphere unit 60 can enter the interior of the preservation cylinder 30B.

[0476] Referring to Figure 6, the food preservation container 500B further includes a modified atmosphere inlet 424B, through which preservative gas can be introduced into the food preservation container 500B.

[0477] Specifically, the food storage container 30B has a modified atmosphere inlet 424B, and a second modified atmosphere channel 70B is connected to the interior of the food storage container 30B via the modified atmosphere inlet 424B.

[0478] The modified atmosphere inlet 424B is located at the upper left corner of the rear wall of the preservation container 30B, and the second temperature sensor is located at the rear left corner of the top wall of the preservation container 30B. The modified atmosphere inlet 424B is close to the second temperature sensor. In this way, the high-temperature preservation gas enters the interior of the preservation container 30B through the modified atmosphere inlet 424B, making the area near the modified atmosphere inlet 424B the highest temperature position inside the preservation container 30B. The placement of the second temperature sensor near the modified atmosphere inlet 424B allows for timely detection of the high temperature inside the preservation container 30B, which is beneficial for temperature control in conjunction with the entry of the preservation gas.

[0479] Furthermore, the food preservation container 500B also includes a modified atmosphere outlet 46B, through which the food preservation container 500B can discharge preservative gas.

[0480] In a preferred embodiment, the line distance between the mounting groove 420B and the modified atmosphere inlet 424B is smaller than the line distance between the mounting groove 420B and the modified atmosphere outlet 46B. This line distance, or straight-line distance, means that the mounting groove 420B is positioned closer to the modified atmosphere inlet 424B. This proximity of the modified atmosphere inlet 424B to the second temperature sensor allows the sensor to promptly detect temperature fluctuations caused by the preservative gas introduced through the modified atmosphere inlet 424B. This information is then promptly relayed to the controller of the refrigeration appliance to control the cooling air, thereby improving the temperature stability within the preservation container 500B. The preservative gases flowing in the first modified atmosphere channel 70 and the second modified atmosphere channel 70B can be the same or different.

[0481] For example, the modified atmosphere unit 60 is used to consume oxygen in the air to form an oxygen-deficient preservation gas, and / or to generate oxygen to form an oxygen-enriched preservation gas; the preservation gases flowing in the first modified atmosphere channel 70 and the second modified atmosphere channel 70B can both be oxygen-deficient preservation gases, or both be oxygen-enriched preservation gases, or one of them can be an oxygen-deficient preservation gas and the other can be an oxygen-enriched preservation gas.

[0482] Understandably, oxygen-deficient preservative gases refer to preservative gases whose volume percentage of oxygen is less than that of oxygen in the air; oxygen-rich preservative gases refer to preservative gases whose volume percentage of oxygen is higher than that of oxygen in the air.

[0483] The modified atmosphere unit 60 can specifically generate a preservative gas through methods such as physical air separation, photocatalysis, chemical reaction, and electrochemical reaction. For example, the modified atmosphere unit 60 can be configured as an electrolytic modified atmosphere unit that generates a preservative gas through an electrochemical reaction.

[0484] Referring to Figures 14 to 16, the controlled atmosphere unit 60 includes at least one anode 61 and at least one cathode 62. The anode 61 is controllably connected to the positive terminal of the power supply, and the cathode 62 is controllably connected to the negative terminal of the power supply.

[0485] Thus, when the controller controls the operation of the modified atmosphere unit 60, under the control of the controller, the positive terminal of the power supply is connected to the anode 61 and the negative terminal of the power supply is connected to the cathode 62, that is, the power supply supplies power to the modified atmosphere unit 60; and when the controller controls the modified atmosphere unit 60 to stop, under the control of the controller, the positive terminal of the power supply is connected to the anode 61 and the negative terminal of the power supply is connected to the cathode 62, that is, the power supply stops supplying power to the modified atmosphere unit 60.

[0486] Furthermore, the modified atmosphere unit 60 also includes an inner cavity that can at least contain the electrolyte.

[0487] The first side of the cathode 62 is exposed in the inner cavity, and the second side is exposed to the external air of the controlled atmosphere unit 60.

[0488] When the controlled atmosphere unit 60 is in operation, i.e., when it is energized, the cathode 62 is used to consume oxygen in the outside air of the controlled atmosphere unit 60 through an electrochemical reaction. Specifically, oxygen undergoes a reduction reaction at the cathode 62, with the reaction formula being O2 + 2H2O + 4e. - →4OH - In this way, an oxygen-deficient preservative gas can be formed outside the controlled atmosphere unit 60.

[0489] One or both sides of the anode 61 are exposed in the inner cavity. The anode 61 is used to generate oxygen in the inner cavity through an electrochemical reaction to form an oxygen-rich preservative gas. Specifically, OH- in the electrolyte... - An oxidation reaction can occur at the anode 61, producing oxygen, with the reaction formula 4OH. - →O2 + 2H2O + 4e - The generated oxygen is collected to form an oxygen-rich preservative gas.

[0490] Either or both of the first modified atmosphere channel 70 and the second modified atmosphere channel 70B can be directly or indirectly connected to the oxygen outlet 63 of the modified atmosphere unit 60 to supply oxygen-enriched preservation gas to the corresponding second preservation container 500 or preservation container 500B; or, either or both of the first modified atmosphere channel 70 and the second modified atmosphere channel 70B can supply oxygen-deficient preservation gas from outside the modified atmosphere unit 60 to the corresponding second preservation container 500 or preservation container 500B.

[0491] In one embodiment, the first modified atmosphere channel 70 is connected to the oxygen outlet 63 of the modified atmosphere unit 60 and is used to receive oxygen-enriched preservation gas from the modified atmosphere unit 60 so as to achieve the function of oxygen-enriched preservation through the drawer 40.

[0492] Meanwhile, one end of the second modified atmosphere channel 70B can be connected to the interior of the preservation cylinder 30B (for example, connected to the modified atmosphere outlet 46B of the preservation cylinder 30B), and the other end can also be connected to the interior of the preservation cylinder 30B (for example, connected to the modified atmosphere inlet 424B of the preservation cylinder 30B). The second side of the cathode 62 is exposed in the second modified atmosphere channel 70B. Thus, the gas in the preservation cylinder 30B first flows through a section of the second modified atmosphere channel 70B to the second side of the cathode 62. The oxygen in the gas is consumed by the electrochemical reaction that occurs in the cathode 62, forming an oxygen-deficient preservation gas. This gas then returns to the interior of the preservation cylinder 30B through another section of the second modified atmosphere channel 70B. This cycle continues until the preservation cylinder 30B achieves an oxygen-deficient environment that meets the target oxygen concentration.

[0493] Regarding the composition of the electrolyte used in the modified atmosphere unit 60, and the specific structure / material of the cathode 62 and anode 61, these are common knowledge in the field of electrolysis technology. For example, the electrolyte can be water electrolyzed with low concentrations of sodium hydroxide or potassium hydroxide, or it can be other alkaline, acidic, or neutral solutions. The cathode 62 can be a composite structure formed by combining a conductive layer, a catalytic layer, a waterproof and breathable layer, or other functional layers through external pressure, heat processing, or other methods. The anode 61 can also be a conductive layer or an inert electrode. Of course, this is not a limitation; any combination of electrolyte, anode 61, and cathode 62 that can achieve an electrochemical reaction to prepare a preservative gas can be used in the construction of the modified atmosphere unit 60 of this application.

[0494] In addition, the modified atmosphere unit 60 also includes an electrolysis box 600, which has at least one window.

[0495] The cathode 62 is sealed and covered at the opening and is fixedly connected to the electrolysis box 600. The first side of the cathode 62 faces the inside of the electrolysis box 600 so as to come into contact with the electrolyte inside the electrolysis box 600. The second side of the cathode 62 is exposed outside the modified atmosphere unit 60 from the opening so as to come into contact with the gas outside the modified atmosphere unit 60.

[0496] In the figure, the electrolytic cell 600 includes two windows arranged opposite each other, and two cathodes 62 are provided, with one cathode 62 located at each window; correspondingly, the anode 61 is located inside the electrolytic cell 600 and between the two cathodes 62, with the anode 61 parallel to the two cathodes 62, so that the two cathodes 62 share the same anode 61. This can improve the electrochemical reaction efficiency of the controlled atmosphere unit 60.

[0497] Furthermore, the refrigeration appliance 100 also includes two oxygen concentration sensors, one of which is located inside the drawer 40 and the other is located inside the food storage container 30B, for detecting oxygen concentration and allowing the controller of the refrigeration appliance 100 to control the operation of the controlled atmosphere unit 60 based on the oxygen concentration.

[0498] For example, in one embodiment, for an application scenario where the modified atmosphere unit 60 supplies oxygen-deficient preservation gas to the interior of the second preservation container 500 (i.e., inside the drawer 40), when the oxygen concentration detected by the oxygen concentration sensor (e.g., the second gas concentration sensor) is higher than the upper limit threshold P1, the controller controls the operation of the modified atmosphere unit 60 until the oxygen concentration drops to the lower limit threshold P2, where P2 < P1, and the controller controls the modified atmosphere unit 60 to stop.

[0499] For example, in another embodiment, for the application scenario where the modified atmosphere unit 60 supplies oxygen-enriched preservation gas to the inside of the preservation container 500B, when the oxygen concentration detected by the oxygen concentration sensor (e.g., the first gas concentration sensor) is lower than the lower concentration threshold P3, the controller controls the operation of the modified atmosphere unit 60 until the oxygen concentration increases to the upper concentration threshold P4, where P3 < P4, and the controller controls the modified atmosphere unit 60 to stop.

[0500] Furthermore, the controller can also be configured to control the operation of the controlled atmosphere unit based on the internal temperature sensed by the second or first temperature sensor; and to control the operation of the refrigerator based on the internal temperature. In this way, on the one hand, controlling the refrigerator's operation by the internal temperature, combined with the placement of the second or first temperature sensor outside the corresponding airflow path, ensures that the sensed temperature is not excessively low, thus making the refrigerator's start-up and shutdown temperatures more reasonable and effective, avoiding poor preservation caused by localized high temperatures; on the other hand, controlling the controlled atmosphere unit's operation by the internal temperature, combined with the placement of the second or first temperature sensor, can more promptly prevent poor preservation caused by abnormally high temperatures in the controlled atmosphere unit's preservative gas.

[0501] In this application, referring to Figures 17 and 18, in order to facilitate the installation of the first temperature sensor and the second temperature sensor, the refrigeration appliance 100 also provides a connector. When the connector is installed on the first body of the preservation container 500B, it constitutes the first connector 51B. When the connector is installed on the second body of the second preservation container 500, it constitutes the second connector 51.

[0502] The first mating component 51B integrates a mounting groove 420B, a detection port 422B, a surrounding plate 423B, and a controlled atmosphere inlet 424B. That is, the mounting groove 420B, detection port 422B, surrounding plate 423B, and controlled atmosphere inlet 424B are all formed on this first mating component 51B and can be simultaneously installed onto the food storage container 30B. A second temperature sensor is fixedly installed within the mounting groove 420B.

[0503] As the second mating component 51, it integrates a mounting groove 420, a detection port 422, a surrounding plate 423, and a controlled atmosphere inlet 424. That is, the mounting groove 420, the detection port 422, the surrounding plate 423, and the controlled atmosphere inlet 424 are all formed on the first mating component 51B and can be simultaneously installed onto the cover plate 42. A first temperature sensor is fixedly installed in the mounting groove 420.

[0504] Thus, the refrigeration appliance of this application, by providing a connecting component on the main body of the preservation container (e.g., preservation container 500B or second preservation container 500), and the connecting component integrating mounting slots 420, 420B for fixing temperature sensors (e.g., second temperature sensor or first temperature sensor) and modified atmosphere inlets 424, 424B for connecting modified atmosphere channels (e.g., second modified atmosphere channel 70B or first modified atmosphere channel 70), not only solves the problems of temperature sensing and the introduction of preservation gas, but also allows the temperature sensor to promptly sense temperature fluctuations caused by the preservation gas introduced by the modified atmosphere inlets 424, 424B. This allows the controller of the refrigeration appliance to promptly control the supply of cold air and the entry of preservation gas, thereby facilitating the internal temperature control of the preservation container (e.g., preservation container 500B or second preservation container 500), improving temperature stability while ensuring the stability of the modified atmosphere function. In addition, this allows for the coordinated monitoring of the temperature inside a preservation container and the temperature of the preservation gas to a certain extent using only one temperature sensor, saving costs.

[0505] Additionally, on the connectors, the enclosures 423 and 423B surround the openings of the exposed mounting slots 420 and 420B and the controlled atmosphere inlets 424 and 424B. Thus, the second temperature sensor can be installed from the outside of the preservation container 500B through the openings into the mounting slot 420B of the first connector 51B, specifically through a snap-fit ​​installation; similarly, the first temperature sensor can be installed from the outside of the second preservation container 500 through the openings into the mounting slot 420 of the second connector 51, specifically through a snap-fit ​​installation.

[0506] The refrigeration appliance 100 also includes seals for closing openings, such as a first seal for closing the opening of the first mating member 51B, and / or a second seal for closing the opening of the second mating member 51. In this way, by providing seals, both the second and first temperature sensors can be sealed off, thereby further preventing the two temperature sensors from directly contacting the cold air and causing the detected temperature to be too low.

[0507] Furthermore, a second gas concentration sensor may be installed inside the second preservation container 500.

[0508] The second gas concentration sensor is used to sense the target gas concentration P2, such as oxygen concentration, inside the second preservation container 500.

[0509] The controller of the refrigeration appliance 100 is connected to the second gas concentration sensor, the first temperature sensor, and the second humidity sensor, and is used to control the start and stop of the atmosphere control unit 60, the start and stop of the refrigeration unit, the opening and closing of the second damper, and the start and stop of the second fan according to the target gas concentration P2, the internal temperature T2, and the humidity value S2.

[0510] Referring to Figure 16, in one embodiment, the controller is configured to: control the start-up and shutdown of the cooler, the opening and closing of the first damper and the start-up and shutdown of the first fan according to the humidity value S1 and / or the internal temperature T1; and to control the start-up and shutdown of the cooler, the opening and closing of the second damper and the start-up and shutdown of the second fan according to the humidity value S2 and / or the internal temperature T2.

[0511] For example, regarding the temperature and humidity of the 500B food storage container, the controller is configured as follows:

[0512] When the humidity value S1 is greater than the first humidity threshold S11 and the internal temperature T1 is lower than the preservation temperature threshold T10, after the refrigeration unit stops operating for a preset time, the first damper is opened and the first fan is started until the humidity value S1 drops to the second humidity threshold S12; when the humidity value S1 is greater than the first humidity threshold S11 and the internal temperature T1 is not lower than the preservation temperature threshold T10, the refrigeration unit is started, the first damper is opened and the first fan is started until the humidity value S1 drops to the second humidity threshold S12.

[0513] That is, the controller can be used to implement a method for controlling the temperature and humidity of the food storage container 500B of the refrigeration appliance 100, including:

[0514] S101, determine whether the humidity value S1 inside the preservation container 500B is greater than the first humidity threshold S11. If yes, execute S102; otherwise, repeat S101.

[0515] S102, determine whether the internal temperature T1 of the preservation container 500B is lower than the preservation temperature threshold T10. If yes, execute S103; otherwise, execute S104.

[0516] S103, after the refrigerator stops running for a preset time, the residual cold of the refrigerator is blown into the compartment 101 and outside the preservation container 500B. Specifically, this can be achieved by controlling the opening of the first damper and the operation of the first fan until the humidity value S1 drops to the second humidity threshold S12 and returns to S101; wherein, the second humidity threshold S12 is lower than the first humidity threshold S11.

[0517] S104, control the operation of the refrigeration unit to blow the cold air from the refrigeration unit into the compartment 101 and outside the preservation container 500B. Specifically, this can be achieved by controlling the opening of the first air damper and the operation of the first fan, until the humidity value S1 decreases to the second humidity threshold S12, and then returns to S101.

[0518] In steps S103 and S104, "opening the first air door and running the first fan" can enable cold air to flow out of the air inlet 131B to the outside of the preservation container 500B. However, it is not agreed whether other air inlets in the chamber 101 located above the shielding plate 15 will flow out cold air at this time. That is, other air inlets in the chamber 101 located above the shielding plate 15 at this time may or may not flow out cold air. In other words, steps S103 and S104 can control the chamber 101 to only allow cold air to enter through the air inlet 131B while other air inlets (especially other air inlets located above the shielding plate 15) do not allow cold air to enter.

[0519] For example, regarding the temperature and humidity of the second preservation container 500, the controller is configured as follows:

[0520] When the humidity value S2 is greater than the first humidity threshold S21 and the internal temperature T2 is lower than the preservation temperature threshold T20, after the refrigeration unit stops operating for a preset time, the second damper is controlled to open and the second fan is started until the humidity value S2 decreases to the second humidity threshold S22; when the humidity value S2 is greater than the first humidity threshold S21 and the internal temperature T2 is not lower than the preservation temperature threshold T20, the refrigeration unit is controlled to operate, the second damper is opened and the second fan is started until the humidity value S2 decreases to the second humidity threshold S22.

[0521] That is, the controller can be used to implement a method for controlling the temperature and humidity of the second preservation container 500 of the refrigeration appliance 100, including:

[0522] S101, determine whether the humidity value S2 in the second preservation container 500 is greater than the first humidity threshold S21. If yes, execute S102; otherwise, repeat S101.

[0523] S102, determine whether the internal temperature T2 of the second preservation container 500 is lower than the preservation temperature threshold T20. If yes, execute S103; otherwise, execute S104.

[0524] S103 After the refrigeration unit stops operating for a preset time, the residual cold air from the refrigeration unit is blown into the second compartment 103 and outside the second preservation container 500. Specifically, this can be achieved by controlling the second damper to open and the second fan to run until the humidity value S2 drops to the second humidity threshold S22 and returns to S101. The second humidity threshold S22 is lower than the first humidity threshold S21.

[0525] S104, control the operation of the refrigeration unit to blow the cold air from the refrigeration unit into the second compartment 103 and outside the second preservation container 500. Specifically, this can be achieved by controlling the second air damper to open and the second fan to run, until the humidity value S2 drops to the second humidity threshold S22, and then return to S101.

[0526] Thus, the controller in this application controls the internal temperature and humidity of each preservation container, or, based on the control method shown in Figure 19, when the humidity is too high, it sends cold air into the compartment where the preservation container is located, accelerating the gas flow outside the preservation container, thereby causing the water vapor inside the preservation container to pass through the air-barrier and moisture-permeable membrane more quickly, thereby achieving humidity regulation; while accelerating the gas flow, it also monitors the internal temperature of the preservation container to introduce cold air at different temperatures (e.g., introducing residual cold air from the refrigerator or newly prepared cold air), thereby saving energy and avoiding drastic temperature fluctuations that are too low or too high.

[0527] Preferably, for the preservation container 500B, its preservation temperature threshold T10 is between the start-up temperature threshold T1on and the shutdown temperature threshold T1off of the preservation container 500B, that is, T1off < T10 < T1on; here, the start-up temperature threshold T1on and the shutdown temperature threshold T1off refer to the temperatures at which the refrigeration system needs to be turned on to supply cold air and the temperatures at which the running refrigeration system needs to be turned off to stop supplying cold air when the preservation container 500B is performing normal low-temperature storage, respectively.

[0528] Similarly, for the second preservation container 500, its preservation temperature threshold T20 is between the start-up temperature threshold T2on and the shutdown temperature threshold T2off of the second preservation container 500, that is, T29 < T20 < T2on; here, the start-up temperature threshold T2on and the shutdown temperature threshold T2off refer to the temperatures at which the refrigeration system needs to be turned on to supply cold air and the temperatures at which the running refrigeration system needs to be turned off to stop supplying cold air when the second preservation container 500 is performing normal low-temperature storage, respectively.

[0529] Referring to Figure 18, in one embodiment, the controller is further configured to: control the start and stop of the atmosphere control unit 60, the start and stop of the cooler, the opening and closing of the first damper and the start and stop of the first fan according to the target gas concentration P1 and / or the internal temperature T1; and to control the start and stop of the atmosphere control unit 60, the start and stop of the cooler, the opening and closing of the second damper and the start and stop of the second fan according to the target gas concentration P2 and / or the internal temperature T2.

[0530] For example, regarding the temperature and humidity of the 500B food storage container, the controller is configured as follows:

[0531] When the target gas concentration P1 meets the concentration threshold range (e.g., the oxygen concentration is below a certain value, which is less than 21% of the oxygen volume in the air), the controlled atmosphere unit 60 stops operating and controls the start / stop of the refrigerator, the opening / closing of the first damper, and the start / stop of the first fan according to the internal temperature T1; when the target gas concentration P1 does not meet the concentration threshold range, the controlled atmosphere unit 60 operates, and during the operation of the controlled atmosphere unit 60, when the internal temperature T1 exceeds the first temperature threshold T11, the refrigerator operates, the first damper opens, and the first fan operates, and during the operation of the controlled atmosphere unit 60, when the internal temperature T1 exceeds the second temperature threshold T12, the refrigerator operates, the first damper opens, and the first fan operates, and the controlled atmosphere unit 60 stops operating.

[0532] Among them, the second temperature threshold T12 is greater than the first temperature threshold T11.

[0533] That is, the controller can be used to implement a method for jointly controlling the temperature and preservative gas of the preservation container 500B of the refrigeration appliance 100, including:

[0534] S201, determine whether the target gas concentration P1 meets the concentration threshold range. If yes, execute S202; otherwise, execute S204.

[0535] S202, determine whether the internal temperature T1 has reached the power-on temperature threshold T1on. If yes, execute S203; otherwise, return to S201.

[0536] S203, control the refrigerator to turn on so that the cold air from the refrigerator can be blown into the compartment 101 and outside the preservation container 500B. Specifically, this can be achieved by controlling the first air door to open and the first fan to run so that the cold air flows out from the air inlet 131B until the internal temperature T1 drops to the shutdown temperature threshold T1off, and then return to S201.

[0537] S204, control the operation of the controlled atmosphere unit 60 and monitor whether the internal temperature T1 exceeds the first temperature threshold T11. If it does, execute S205; otherwise, execute S201.

[0538] S205, control the refrigerator to turn on so that the cold air from the refrigerator is blown into the compartment 101 and outside the preservation container 500B. Specifically, this can be achieved by controlling the first air damper to open and the first fan to run so that the cold air flows out from the air inlet 131B. Monitor whether the internal temperature T1 exceeds the second temperature threshold T12. If so, control the controlled atmosphere unit 60 to stop running. Otherwise, return to S201.

[0539] Where T12 > T11, and T12 > T1on > T11.

[0540] For example, regarding the temperature and humidity of the second preservation container 500, the controller is configured as follows:

[0541] When the target gas concentration P2 meets the concentration threshold range (e.g., the oxygen concentration is higher than a certain value, which is greater than 21% of the oxygen volume in the air), the controlled atmosphere unit 60 stops operating and controls the start / stop of the refrigerator, the opening and closing of the second damper, and the start / stop of the second fan according to the internal temperature T2; when the target gas concentration P2 does not meet the concentration threshold range, the controlled atmosphere unit 60 operates, and during the operation of the controlled atmosphere unit 60, when the internal temperature T2 exceeds the first temperature threshold T21, the controlled refrigerator operates, the second damper opens, and the second fan operates, and during the operation of the controlled atmosphere unit 60, when the internal temperature T2 exceeds the second temperature threshold T22, the controlled refrigerator operates, the second damper opens, the second fan operates, and the controlled atmosphere unit 60 stops operating.

[0542] That is, the controller can be used to implement a method for jointly controlling the temperature and preservative gas of the second preservation container 500 of the refrigeration appliance 100, including:

[0543] S201, determine whether the target gas concentration P2 meets the concentration threshold range. If yes, execute S202; otherwise, execute S204.

[0544] S202, determine whether the internal temperature T2 has reached the power-on temperature threshold T2on. If yes, execute S203; otherwise, return to S201.

[0545] S203, control the refrigerator to turn on so that the cold air from the refrigerator can be blown into the second compartment 103 and outside the second preservation container 500. Specifically, this can be achieved by controlling the second damper to open and the second fan to run so that the cold air flows out from the air inlet 131 until the internal temperature T2 drops to the shutdown temperature threshold T2off, and then return to S201.

[0546] S204, control the operation of the controlled atmosphere unit 60 and monitor whether the internal temperature T2 exceeds the first temperature threshold T21. If it does, execute S205; otherwise, execute S201.

[0547] S205, control the refrigerator to turn on so that the cold air from the refrigerator is blown into the second compartment 103 and outside the second preservation container 500. Specifically, this can be achieved by controlling the second damper to open and the second fan to run so that the cold air flows out from the air inlet 131. Monitor whether the internal temperature T2 exceeds the second temperature threshold T22. If so, control the controlled atmosphere unit 60 to stop running. Otherwise, return to S201.

[0548] Where T22 > T21, and T22 > T2on > T21.

[0549] Thus, the controller in this application, through its combined control of the temperature and preservative gas of each preservation container, or based on the control method shown in Figure 20, continuously monitors the internal temperature of the preservation container during the operation of the controlled atmosphere unit 60 to supply preservative gas. If the internal temperature exceeds a first temperature threshold, cooling is activated while preservative gas continues to enter. However, if the internal temperature T2 further exceeds a higher second temperature threshold, preservative gas entry is stopped while cooling is activated. This balances controlled atmosphere preservation and temperature control, avoiding a sharp temperature increase due to blind control of controlled atmosphere preservation, which could degrade the storage environment. Furthermore, this application integrates a temperature sensor mounting slot and a controlled atmosphere inlet for preservative gas into the connector, enabling more timely monitoring and prediction of temperature fluctuation risks caused by the entry of preservative gas, further avoiding the potential risk of a sharp temperature increase and improving the preservation effect. In summary, the beneficial effects of an embodiment of this application are as follows: by setting guide ribs on the outside of the preservation container, cold air can flow along the outer surface of the preservation container, which can not only achieve rapid cooling of the preservation container, but also ensure uniform cooling and avoid local high temperature inside the preservation container, while not affecting the environment inside the preservation container and avoiding drastic fluctuations in the preservation environment.

[0550] The beneficial effects of one embodiment of this application are as follows: by setting a guide air duct outside the food preservation container, cold air can flow along the outer surface of the food preservation container, thereby achieving rapid cooling of the food preservation container. It can also ensure uniform cooling and avoid local high temperatures inside the food preservation container. On this basis, a second temperature sensor is set outside the food preservation container to detect the internal temperature of the food preservation container. The second temperature sensor is located outside the guide air duct, so on the one hand, the cold air will not directly contact the second temperature sensor, and on the other hand, the second temperature sensor is not within the area of ​​the food preservation container through which the cold air flows. This can greatly reduce the temperature detection deviation (e.g., too low) caused by the direct blowing of cold air, thereby improving the accuracy of temperature monitoring results and ensuring the cooling effect at all locations inside the food preservation container.

[0551] Next, referring to Figures 21 to 34, a refrigeration appliance is provided in the second embodiment of this application.

[0552] Referring to Figure 21, one embodiment of this application provides a refrigeration appliance 7100, which includes a housing 71, an inner liner 711, and a casing 712 disposed outside the inner liner 711. A compartment 72 is defined within the inner liner 711.

[0553] Referring to Figures 22 to 27, the refrigeration appliance 7100 also includes a preservation container 73, which is housed within a compartment 72. The preservation container 73 has storage space. The term "preservation container" refers to a container whose gas concentration can be adjusted according to needs. In this embodiment, the gas refers to oxygen. In other embodiments, the gas can be set to other types of gas as needed.

[0554] The refrigeration appliance 7100 also includes a refrigeration system and a cooling aisle. The cooling aisle connects the refrigeration system and the compartment 72 and supplies cooling airflow, i.e., cold air, to the outside of the preservation container 73.

[0555] The food preservation container 73 has a cold air channel, and the cold air channel can also be connected to the interior of the food preservation container 73.

[0556] Referring to Figures 24 to 26, the refrigeration appliance 7100 also includes a modified atmosphere unit 74 and a modified atmosphere channel. The modified atmosphere unit 74 is used to prepare a preservative gas, and the modified atmosphere channel connects the modified atmosphere unit 74 to the interior of the preservation container 73 and supplies the preservative gas to the interior of the preservation container 73. The term "preservative gas" refers to a gas that can be used to regulate the oxygen concentration. Specifically, if the oxygen concentration in the preservative gas is greater than the oxygen concentration in the air (i.e., an oxygen-rich flow), or if the oxygen concentration in the preservative gas is less than the oxygen concentration in the air (i.e., an oxygen-deficient flow), the oxygen concentration can be regulated.

[0557] By supplying preservative gas into the preservation container 73 through the controlled atmosphere channel, the oxygen concentration inside the container 73 can be regulated. The moisture carried by the preservative gas can increase the humidity inside the container 73, thus delaying the drying of the food stored inside and improving its preservation effect. By supplying cold air to the outside of the preservation container 73 through the cooling channel, this portion of cold air circulates on the outside of the container 73, thereby removing some of the heat from the container 73 and cooling it down. This prevents a large amount of cold air from entering the container 73 and interfering with the preservative gas, thus avoiding large fluctuations in the oxygen concentration and preventing the food from drying out, thereby avoiding affecting the preservation effect. A portion of the cold air can be sent into the preservation container 73 through the cold air channel, thereby preventing excessive moisture carried by the preservative gas from causing condensation or frost inside the container 73.

[0558] The refrigeration appliance 7100 also includes a power supply and a controller, which is connected to the controlled atmosphere unit 74.

[0559] The specific structure and working principle of the modified atmosphere unit 74 can be found in the first embodiment described above.

[0560] The refrigeration system includes a compressor, condenser, throttling device, and evaporator connected in sequence.

[0561] In one embodiment, the oxygen concentration inside the preservation container 73 is greater than the oxygen concentration in the air, and the oxygen concentration in the preservation gas supplied to the preservation container 73 by the modified atmosphere channel is also greater than the oxygen concentration in the air. In other words, the preservation container 73 provides an oxygen-rich environment with a high oxygen concentration. This oxygen-rich environment inhibits the growth and reproduction of anaerobic bacteria, and the higher oxygen concentration allows it to combine with deoxymyoglobin on the surface of the meat to form a thicker layer of oxymyoglobin, thereby maintaining the bright red color of the meat, improving its color stability, and thus enhancing its preservation effect.

[0562] In another embodiment, the oxygen concentration inside the preservation container 73 is lower than the oxygen concentration in the air, and the oxygen concentration in the preservation gas supplied to the preservation container 73 by the modified atmosphere channel is also lower than the oxygen concentration in the air. In other words, the preservation container 73 provides an oxygen-deficient environment with a low oxygen concentration. This oxygen-deficient environment can inhibit the aerobic respiration of fruits and vegetables, reducing the consumption of organic matter such as sugars, and can also minimize their anaerobic respiration, preventing the production of substances such as alcohol that could affect the quality of the fruits and vegetables.

[0563] Referring to Figure 23, the food preservation container 73 includes a drawer 732, a cover 733, and a door 734. The drawer 732 has a first opening 7321, the cover 733 is used to close the first opening 7321, and the door 734 is connected to the drawer 732.

[0564] Referring to Figures 22 to 27, the refrigeration appliance 7100 includes a preservation cylinder 75, which encloses a compartment 72. A preservation container 73 is located inside the preservation cylinder 75. The preservation cylinder 75 has a second opening 751. A door panel 734 is used to open or close the second opening 751. The opening directions of the first opening 7321 and the second opening 751 are different.

[0565] In this way, there is a space between the preservation container 73 and the preservation cylinder 75, which forms a circulation path for cold air. This facilitates heat exchange with the air inside the preservation container 73, thereby reducing the temperature inside the preservation container 73. It also prevents a large amount of cold air from entering the preservation container 73 and affecting the oxygen concentration inside, thus avoiding large fluctuations in the oxygen concentration inside the preservation container 73. Furthermore, it prevents the food from drying out, thereby avoiding any impact on the preservation effect.

[0566] Since the door panel 734 is connected to the drawer 732, the drawer 732 can move relative to the food storage container 75 in the direction of the opening of the second opening 751 and in the opposite direction. When the drawer 732 moves to the point where it is at least partially outside the food storage container 75, it is convenient to store and retrieve items from the drawer 732.

[0567] The cover plate 733 is fixedly connected to the food storage container 75. When the drawer 732 moves relative to the food storage container 75, the drawer 732 moves relative to the cover plate 733 at the same time. So when the drawer 732 moves to a position where at least part of it is outside the food storage container 75, at least part of the first opening 7321 is exposed to the external environment, which makes it convenient to access items from the drawer 732.

[0568] Drawer 732 has a first position located inside the preservation container 75 and a second position located outside the preservation container 75. When drawer 732 is in the first position, cover 733 closes drawer 732 to control the oxygen concentration inside preservation container 73. When drawer 732 is in the second position, cover 733 is offset from drawer 732. Of course, the inside of preservation container 73 is not a completely sealed space; a cooling channel is provided in cover 733 or drawer 732 and allows cold air to pass through.

[0569] In one specific embodiment, the opening directions of the first opening 7321 and the second opening 751 are perpendicular to each other. This facilitates the processing of the food preservation cylinder 75 and the food preservation container 73, improves feasibility, and also makes it easier for the door panel 734 to drive the drawer 732 to move relative to the food preservation cylinder 75 so as to store and retrieve items.

[0570] Referring to Figures 25 to 27, the preservation container 75 is provided with an air inlet 752, which connects the refrigeration system and the compartment 72. A cold air channel is provided on the cover plate 733, which connects the internal and external spaces of the preservation container 73. This facilitates the connection of the cooling channel to the inside of the preservation container 73 through the cold air channel, so as to prevent excessive moisture in the preservation gas from causing condensation and frost inside the preservation container 73.

[0571] Preferably, the air inlet 752 is located on the side of the cover 733 away from the drawer 732. In this way, the cold air entering the compartment 72 from the air inlet 752 can be blown at least most of the way to the side of the cover 733 away from the drawer 732, flowing between the refrigerator 75 and the drawer 732, thereby exchanging heat with the drawer 732 and lowering the temperature inside the drawer 732.

[0572] The food storage container 75 includes a first wall 753 disposed opposite to the door panel 734, and an air inlet 752 disposed on the first wall 753 to facilitate the arrangement of the cooling channel and shorten the path of the cooling channel.

[0573] In one embodiment, the cold air channel is located in the preservation container 73 near the air inlet 752. This ensures that after the cold air enters the compartment 72 from the air inlet 752, that is, after entering a large space from a small air vent, there is enough power to allow some of the cold air to enter the preservation container 73 through the cold air channel.

[0574] In one specific embodiment, the cold air channel is located at one end of the cover plate 733 near the first wall 753. In this way, the cold air channel is located on the flow path of the cold air, thereby ensuring that after the cold air enters the compartment 72 from the air inlet 752, a portion of the cold air can enter the preservation container 73 through the cold air channel.

[0575] In another specific embodiment, the cold air channel is located on the first wall 753 near the air inlet 752. In this way, after the cold air enters the compartment 72, due to its sinking, some of the cold air can enter the preservation container 73 through the cold air channel.

[0576] Preferably, multiple cold air channels are provided to increase the amount of cold air entering the preservation container 73 to a certain extent, so as to achieve the effect of preventing condensation and frost formation.

[0577] Multiple cold air channels are arranged at intervals along a first direction, which is the direction from the first wall 753 toward the door panel 734. In this way, after the cold air enters the compartment 72, when it flows around the outer periphery of the preservation container 73 and passes the cover 733, it can enter the preservation container 73 through multiple cold air channels, so as to ensure the amount of cold air entering the preservation container 73 and achieve the effect of preventing condensation and frost.

[0578] The cold air passage includes at least one of the following: a slit, a hole 7311, and a groove 7312. This prevents excessive cold air from entering the preservation container 73, which could cause large fluctuations in the oxygen concentration within the container.

[0579] In one embodiment, the cold air passage is a slit. Specifically, the cold air passage is a narrow slit between the cover 733 and the drawer 732, through which cold air can be controlled to enter the preservation container 73 in a small amount.

[0580] The seam can be located at one end of the cover plate 733 near the first wall 753, or at one end of the first wall 753 near the cover plate 733.

[0581] Referring to Figures 30 to 32, in another embodiment, the cold air channel is at least one of hole 7311 and groove 7312 to limit the amount of cold air entering the preservation container 73, so as to avoid excessive cold air entering the preservation container 73 and causing large fluctuations in the oxygen concentration in the preservation container 73.

[0582] In one specific embodiment, the cold air channel is a hole 7311, which is disposed on the cover plate 733. The cold air channel may include a plurality of holes 7311 arranged at intervals. The plurality of holes 7311 are located at one end of the cover plate 733 near the first wall 753, so that the temperature of the cold air entering the preservation container 73 is low; or, a portion of the plurality of holes 7311 are located at one end of the cover plate 733 near the first wall 753, and another portion is located at one end of the cover plate 733 away from the first wall 753.

[0583] In another specific embodiment, the cold air channel is a groove 7312, which is a square groove 7312 or an arc-shaped groove 7312. The groove 7312 is located at one end of the cover plate 733 near the first wall 753, so that the cold air enters the preservation container 73 at a lower temperature.

[0584] Preferably, multiple slots 7312 are provided, and the multiple slots 7312 are arranged at intervals.

[0585] Referring to Figure 30, at least one of the plurality of grooves 7312 is located at the end of the cover plate 733 near the first wall 753, and the remaining grooves 7312 are located at the end of the cover plate 733 away from the first wall 753.

[0586] In another specific embodiment, the cold air channel includes holes 7311 and grooves 7312, which are spaced apart. Referring to Figure 31, preferably, multiple holes 7311 are provided. The holes 7311 are located at the end of the cover plate 733 near the first wall 753, and the grooves 7312 are located at the end of the cover plate 733 away from the first wall 753. Of course, the positions of the holes 7311 and the grooves 7312 can also be interchanged.

[0587] The inner liner 711 is provided with an air duct cover 7111, which is positioned opposite to the door panel 734. The air duct cover 7111 defines a cold air duct 71111, which is equipped with a fan. The cooling channel passes through the cold air duct 71111, thereby sending the cooling capacity generated by the refrigeration system into the compartment 72.

[0588] Referring to Figures 22 to 27, the air duct cover 7111 is provided with an air inlet 7112, and the air inlet 752 is located at the corresponding air inlet 7112 of the preservation cylinder 75. The air inlet 752 is connected to and communicates with the air inlet 7112.

[0589] The modified atmosphere channel is located between the air duct cover 7111 and the food storage container 75.

[0590] Referring to Figures 22 to 27, the preservation container 75 is also provided with a return air vent 754, which is also located on the first wall 753, so that the cold air entering the compartment 72 from the air inlet 752 flows around the periphery of the preservation container 73 and is discharged from the compartment 72 through the return air vent 754.

[0591] The air inlet 752 is located on the side of the cover 733 away from the drawer 732. This allows the cold air entering the compartment 72 from the air inlet 752 to sink and exchange heat with the air in the preservation container 73, thereby improving the refrigeration efficiency.

[0592] In the opening direction of the first opening 7321, the return air vent 754 is located on the side of the cover plate 733 away from the air inlet 752. This facilitates the cold air entering the compartment 72 from the air inlet 752, circulating around the outer periphery of the preservation container 73, and then being discharged from the compartment 72 through the return air vent 754.

[0593] Referring to Figures 27 to 29, the food preservation container 73 also includes a connecting part 735, which connects the drawer 732 and the door panel 734.

[0594] The connecting part 735 is provided with multiple ventilation openings 7351. In this way, after the cold air enters the compartment 72 through the air inlet 752, it flows towards the door panel 734 through the space between the cover 733 and the food storage container 75. After flowing to the position near the door panel 734, it flows through the multiple ventilation openings 7351 into the space between the drawer 732 and the door panel 734, and then flows from the side of the drawer 732 away from the cover 733 to the return air vent 754. In this way, the cold air can circulate around the outer periphery of the food storage container 73 and then be discharged from the compartment 72 through the return air vent 754.

[0595] Referring to Figures 30 and 31, in one embodiment, the modified atmosphere channel includes a modified atmosphere inlet 7331 disposed on the cover plate 733. The modified atmosphere inlet 7331 connects the interior and exterior of the preservation container 73, and the modified atmosphere channel is connected to the interior of the preservation container 73 through the modified atmosphere inlet 7331.

[0596] The modified atmosphere channel also includes a pipe connector 755 fixedly installed on the preservation container 75. One end of the pipe connector 755 is inserted into the modified atmosphere inlet 7331, and the other end of the pipe connector 755 is exposed on the outer wall of the preservation container 75.

[0597] The modified atmosphere channel may also include an air tube, one end of which is connected to the modified atmosphere unit 74, and the other end is connected to a pipe connector 755. Specifically, the other end is connected to the end of the pipe connector 755 exposed on the outer wall of the food storage container 75.

[0598] In this way, the preservative gas prepared by the modified atmosphere unit 74 can be sequentially sent into the preservation container 73 through the gas pipe, pipe connector 755, and modified atmosphere inlet 7331, avoiding the situation where the preservative gas enters the compartment 72 but is located outside the preservation container 73, thus failing to preserve the food stored in the preservation container 73.

[0599] The outer wall of the preservation container 73 is also provided with a surrounding plate 736. The surrounding plate 736 surrounds the modified atmosphere inlet 7331 and extends from the outer wall of the cover plate 733 to the inner wall of the preservation cylinder 75. In this way, other components can be prevented from affecting the connection between the pipe connector 755 and the modified atmosphere inlet 7331.

[0600] In summary, the refrigeration appliance 7100 of this application supplies preservative gas to the interior of the preservation container 73 through a controlled atmosphere channel, which can regulate the oxygen concentration inside the preservation container 73. The water vapor carried in the preservative gas can increase the humidity inside the preservation container 73, thus delaying the drying of the food stored in the preservation container 73 and improving its preservation effect. Cold air is supplied to the outside of the preservation container 73 through a cooling channel. This cold air circulates on the outside of the preservation container 73, thereby carrying away some of the heat inside the preservation container 73 and cooling it down. This prevents a large amount of cold air from entering the preservation container 73 and interfering with the preservative gas, thus avoiding large fluctuations in the oxygen concentration and preventing the food from drying out, thereby avoiding affecting the preservation effect. A portion of the cold air can be sent into the preservation container 73 through the cold air channel, thereby preventing excessive water vapor carried in the preservative gas from causing condensation and frost inside the preservation container 73.

[0601] Next, referring to Figures 35 to 39, the refrigeration appliance provided in the third embodiment of this application includes a housing, a controlled atmosphere unit 84, a controlled atmosphere channel, a power supply, and a controller.

[0602] The inner liner of the box is limited to 82 compartments.

[0603] The modified atmosphere unit 84 is used to prepare a preservative gas. The modified atmosphere channel connects the modified atmosphere unit 84 and the chamber 82 and supplies the preservative gas, such as an oxygen-enriched flow or an oxygen-depleted flow, into the chamber 82. For the structure and principle of the modified atmosphere unit 84, please refer to the first and second embodiments above.

[0604] The power supply is connected to the electrodes of the modified atmosphere unit 84; the controller is connected to the modified atmosphere unit 84 to control the operation of the modified atmosphere unit 84.

[0605] Referring to Figure 35, the refrigeration appliance also includes a preservation container (i.e., the whole of drawer 832 and cover 833), which is housed in a compartment 82 and has storage space. The preservation container is provided with a selectively permeable membrane 831 to allow specific gases to pass through.

[0606] The gas concentration inside the preservation container can be adjusted as needed; in this embodiment, the gas refers to oxygen, but in other embodiments, the gas can be set to other types of gas as needed.

[0607] Preservative gas is supplied to the interior of compartment 82 and the exterior of the preservation container through the controlled atmosphere channel. The selectively permeable membrane 831 allows oxygen from the preservative gas supplied to the interior of compartment 82 to enter the interior of the preservation container, thereby creating an oxygen-rich environment where the oxygen concentration inside the preservation container is greater than that in the air. Alternatively, the oxygen inside the preservation container can be discharged through the selectively permeable membrane 831, thereby creating an oxygen-deficient environment where the oxygen concentration inside the preservation container is less than that in the air. Both oxygen-rich and oxygen-deficient environments can improve the preservation effect on food.

[0608] In one embodiment, the target oxygen concentration inside the preservation container is greater than the oxygen concentration in the air, and the oxygen concentration in the preservation gas supplied to the compartment 82 by the controlled atmosphere channel is also greater than the oxygen concentration in the air. In other words, the preservation container provides an oxygen-rich environment with a high oxygen concentration, which is suitable for storing meat products to improve their color stability and preservation effect.

[0609] Thus, the selectively breathable membrane 831 is configured to allow oxygen from the outside of the preservation container to enter the preservation container, thereby controlling the provision of an oxygen-rich environment inside the preservation container.

[0610] In another embodiment, the target oxygen concentration inside the preservation container is lower than the oxygen concentration in the air, and the oxygen concentration in the preservation gas supplied to the compartment 82 by the controlled atmosphere channel is also lower than the oxygen concentration in the air. In other words, the preservation container provides an oxygen-deficient environment with a low oxygen concentration. This is suitable for storing fruits and vegetables, inhibiting their aerobic respiration, reducing the consumption of organic matter such as sugars, and also reducing their anaerobic respiration to prevent the production of substances like alcohol, thereby improving the preservation effect of fruits and vegetables.

[0611] Thus, the selectively breathable membrane 831 is configured to allow oxygen to escape from the preservation container in order to control the provision of an oxygen-deficient environment inside the preservation container.

[0612] In one embodiment, the air supply of the controlled atmosphere unit 84 can be adjusted by controlling the operating power of the controlled atmosphere unit 84, and the air supply of the controlled atmosphere unit 84 is positively correlated with its operating power; in another embodiment, the air supply of the controlled atmosphere unit 84 can also be adjusted by controlling the operating current of the controlled atmosphere unit 84, and the air supply of the controlled atmosphere unit 84 is positively correlated with its operating current; in yet another embodiment, the air supply of the controlled atmosphere unit 84 can also be adjusted by controlling the opening angle of the air passage valve of the controlled atmosphere unit 84, and the air supply of the controlled atmosphere unit 84 is positively correlated with the opening angle of its air passage valve.

[0613] In one embodiment, the food preservation container is further provided with a moisture-permeable membrane to allow moisture to drain out of the container, thereby preventing condensation or frost from forming inside the container.

[0614] Referring to Figure 35, the refrigeration appliance includes a preservation cylinder 85, which encloses a compartment 82.

[0615] Referring to Figures 36 to 38, the food storage container 85 is provided with a modified atmosphere inlet 851, and the modified atmosphere channel is connected to the modified atmosphere inlet 851. That is, the modified atmosphere channel is connected to the compartment 82 through the modified atmosphere inlet 851.

[0616] Referring to Figure 35, the preservation container includes a drawer 832 and a cover 833. A selectively permeable membrane 831 is disposed on the cover 833, and a modified atmosphere inlet 851 is located on the side of the cover 833 opposite to the drawer 832. This allows the preservative gas entering the compartment 82 from the modified atmosphere inlet 851 to reach the selectively permeable membrane 831 as quickly as possible via a shorter path, thereby regulating the oxygen concentration inside the preservation container, improving oxygen regulation efficiency, and saving energy.

[0617] The food storage container 85 has a first opening 852, and the drawer 832 has a second opening 8321. A cover 833 is used to close the second opening 8321, and the opening direction of the second opening 8321 is different from that of the first opening 852. Through the cooperation of the cover 833 and the drawer 832, a relatively closed space can be formed inside the food storage container to prevent large fluctuations in the oxygen concentration inside.

[0618] Referring to Figure 36, the food storage container 85 includes a first wall 853 disposed opposite to the first opening 852, and a modified atmosphere inlet 851 disposed on the first wall 853. This facilitates the layout of the modified atmosphere channel and shortens the modified atmosphere channel.

[0619] Drawer 832 has a door panel 834 for opening or closing the first opening 852. Thus, when drawer 832 is inside the preservation container 85, the compartment 82 forms a relatively enclosed space, while a space exists between the preservation container and the preservation container 85. This space forms a channel for preservative gases, which helps improve the efficiency of oxygen passing through the selectively permeable membrane 831, thereby ensuring the oxygen concentration in the preservation container and preventing any impact on the preservation effect.

[0620] By moving the door panel 834 relative to the food storage container 85, the drawer 832 can move relative to the food storage container 85 in the opening direction of the first opening 852 or in the opposite direction. When the drawer 832 moves to the point where it is at least partially outside the food storage container 85, it is convenient to store and retrieve items from the drawer 832.

[0621] The cover plate 833 is fixedly or movably connected to the food storage container 85. When the drawer 832 moves relative to the food storage container 85, the drawer 832 moves relative to the cover plate 833 at the same time. So when the drawer 832 moves to a position where at least part of it is outside the food storage container 85, at least part of the second opening 8321 is exposed to the external environment, thereby facilitating the storage and retrieval of items from the drawer 832.

[0622] Drawer 832 has a first position located inside the food storage container 85 and a second position located outside the food storage container 85. When drawer 832 is in the first position, cover plate 833 closes drawer 832 to control the temperature and oxygen concentration inside the food storage container. When drawer 832 is in the second position, cover plate 833 is misaligned with drawer 832.

[0623] In one specific embodiment, the opening directions of the first opening 852 and the second opening 8321 are perpendicular to each other. This facilitates the processing of the food preservation cylinder 85 and the food preservation container, improves feasibility, and also makes it easier for the door panel 834 to drive the drawer 832 to move relative to the food preservation cylinder 85 so as to store and retrieve items.

[0624] The cover plate 833 is provided with vent holes 8331, and the selective vent membrane 831 is provided at the corresponding vent holes 8331 of the cover plate 833. That is, the vent holes 8331 are covered by the selective vent membrane 831 so that oxygen can enter or exit the preservation container through the selective vent membrane 831 and the vent holes 8331.

[0625] The moisture-permeable membrane can be installed on the cover plate 833 or the drawer 832.

[0626] Referring to Figures 35 to 38, in this embodiment, a moisture-permeable membrane is disposed on the cover plate 833, and the moisture-permeable membrane is a selectively breathable and moisture-permeable membrane, that is, the selectively breathable membrane 831 adopts a selectively breathable and moisture-permeable membrane that also has a moisture-permeable function. It can not only allow oxygen to pass through, but also allow water to pass through. In this way, the two functions of moisture permeability and selective air permeability can be combined into one, so as to reduce the processing difficulty of the preservation container and save costs.

[0627] Of course, in other embodiments, the moisture-permeable membrane may also be disposed on the cover plate 833 at a position different from that of the selectively breathable membrane 831. In this case, the cover plate 833 is also provided with a vent 8331 corresponding to the moisture-permeable membrane.

[0628] Referring to Figure 35, a guide rib 8332 is provided on the side of the cover plate 833 facing away from the drawer 832. The guide rib 8332 is provided corresponding to the modified atmosphere inlet 851 to guide the preservation gas to the selectively permeable membrane 831. In this way, the preservation gas entering the compartment 82 from the modified atmosphere inlet 851 can be guided to the selectively permeable membrane 831 as quickly as possible to improve the oxygen regulation efficiency.

[0629] The cover plate 833 is also provided with a second guide rib 8333. The second guide rib 8333 is located on the side of the cover plate 833 away from the drawer 832, that is, on the upper side. The second guide rib 8333 surrounds the selective breathable membrane 831 to gather the freshness-preserving gas at the selective breathable membrane 831.

[0630] Referring to Figure 38, in another embodiment, the preservation cylinder 85 is provided with an airflow channel 854, and the inner wall 857 of the preservation cylinder 85 is provided with an air inlet 855, which corresponds to the selectively permeable membrane 831. The modified atmosphere channel connects the modified atmosphere unit 84 and the compartment 82 through the airflow channel 854 and the air inlet 855. In this way, the preservation gas can be directly blown onto the selectively permeable membrane 831, thereby improving the oxygen regulation efficiency.

[0631] Specifically, the preservation container 85 includes an outer wall 856, an inner wall 857, and an insulation layer. The insulation layer is located between the inner wall 857 and the outer wall 856. An airflow channel 854 is located in the insulation layer. The airflow channel 854 is connected to the air outlet 855 provided on the inner wall 857 and is connected to the compartment 82 through the air outlet 855.

[0632] Refrigeration equipment also includes a refrigeration system and a cooling channel. The cooling channel connects the refrigeration system and the preservation container and supplies cooling airflow, i.e., cold air, into the preservation container. This can cool the inside of the preservation container to the preset temperature, and further improve the preservation effect of the food stored in it through low temperature.

[0633] The refrigeration system includes a compressor, condenser, throttling device, and evaporator connected in sequence.

[0634] The inner liner 811 is provided with an air duct cover 8111, which is positioned opposite to the door panel 834. The air duct cover 8111 defines a cold air duct, which is equipped with a fan. The cooling channel is integrated with or connected to the cold air duct, thereby sending the cooling capacity generated by the refrigeration system into the compartment 82 through the cooling channel.

[0635] The first wall 853 of the preservation container 85 is provided with a cold air inlet 8531, and the cold air duct is connected to the cold air inlet 8531, so that the cold air in the cold air duct enters the preservation container 85 through the cold air inlet 8531.

[0636] In one embodiment, the air volume of the cooling air supply system is adjusted by controlling the speed of the compressor, and the air volume of the cooling air supply system is positively correlated with the speed of the compressor; in another embodiment, the air volume of the cooling air supply system is adjusted by controlling the opening angle of the damper, and the air volume of the cooling air supply system is positively correlated with the opening angle of the damper.

[0637] Referring to Figures 36 and 39, the cover plate 833 is provided with an air inlet 8334, the preservation container 85 is provided with a pipe connector and an air outlet, and the drawer 832 is provided with a return air inlet. One end of the pipe connector is inserted into the air inlet 8334, and the other end extends out of the preservation container 85 to form a cold air inlet 8531, so as to connect with the cold air duct. The return air inlet and the air outlet are connected. In this way, the cooling channel is connected to the inside of the preservation container through the pipe connector, thereby forming a passage for cold air in the preservation container 85.

[0638] The air inlet 8334 and the selective breathable membrane 831 are spaced apart to avoid interference between the cold air and the preservation gas when they enter the preservation container.

[0639] The drawer 832 includes a first plate 8322 disposed facing and opposite to the first wall 853, and the first plate 8322 is also disposed opposite to the first opening 852.

[0640] When the opening directions of the first opening 852 and the second opening 8321 are perpendicular to each other, the first plate 8322 and the cover plate 833 are perpendicular to each other.

[0641] The controlled atmosphere channel is located between the air duct cover 8111 and the preservation cylinder 85, which makes use of the space in the inner liner 811 and avoids having a significant impact on the volume of the refrigeration appliance.

[0642] Referring to Figure 39, the refrigeration appliance also includes an air guide plate 86 located inside the preservation container (i.e., inside drawer 832). The air guide plate 86 is located at the air inlet 8334 and can rotate relative to the selectively permeable membrane 831. In this way, the path of the cold air after entering the preservation container can be adjusted by rotating the air guide plate 86, thereby controlling whether the cold air path and the preservation gas path interfere with each other as needed.

[0643] Refrigeration appliances also include humidity sensors, which are used to detect the humidity inside the food storage container.

[0644] Specifically, the humidity sensor can be placed inside the food storage container to improve the accuracy of its humidity measurement.

[0645] The refrigeration appliance also includes a control system, which is connected to the humidity sensor and the air guide plate 86, and is used for:

[0646] The angle of the air guide plate 86 relative to the selectively breathable and moisture-permeable membrane is controlled based on the humidity RH detected by the humidity sensor.

[0647] In this way, the angle of the air guide plate 86 relative to the selectively breathable and moisture-permeable membrane can be controlled according to the humidity RH inside the preservation container, so as to control whether the cold air supplied from the air inlet 8334 to the preservation container blows directly onto the selectively breathable and moisture-permeable membrane, thereby achieving the adjustment of the humidity inside the preservation container and controlling the humidity inside the preservation container within a preset range.

[0648] The air guide plate 86 is rotatably connected to the first plate 8322, that is, the air guide plate 86 is connected to the first plate 8322 and can rotate relative to the first plate 8322. Since the first plate 8322 is perpendicular to the cover plate 833, and the selectively breathable and moisture-permeable membrane is disposed on the cover plate 833, when the air guide plate 86 rotates relative to the first plate 8322, the air guide plate 86 also rotates relative to the selectively breathable and moisture-permeable membrane.

[0649] When the plane containing the air guide plate 86 passes the selectively breathable membrane 831, the air inlet 8334 faces the air guide plate 86. This facilitates the adjustment of the cold air path by the air guide plate 86, so that when the air guide plate 86 rotates relative to the first plate 8322, the cold air supplied into the preservation container from the air inlet 8334 can be blown toward the selectively breathable and moisture-permeable membrane.

[0650] The control system is also used to: when the humidity RH detected by the humidity sensor is greater than the first preset humidity RH1, control the air guide plate 86 to rotate so that the plane where the air guide plate 86 is located passes through the selectively breathable and moisture-permeable membrane. When the humidity RH detected by the humidity sensor exceeds the first preset humidity RH1, the humidity RH inside the food preservation container is too high, which will cause condensation or frost to form inside the food preservation container. At this time, by controlling the air guide plate 86 to rotate so that the plane where the air guide plate 86 is located passes through the selectively breathable and moisture-permeable membrane, the cold air supplied into the food preservation container from the air inlet 8334 can be directly blown onto the selectively breathable and moisture-permeable membrane, thereby removing the condensation and frost generated inside the food preservation container and reducing the humidity inside the food preservation container.

[0651] The control system is also used to: when the humidity RH detected by the humidity sensor is ≤ a first preset humidity RH1, control the air guide plate 86 to rotate so that the plane where the air guide plate 86 is located does not pass through the selectively breathable and moisture-permeable membrane. Thus, when the humidity RH detected by the humidity sensor does not exceed the first preset humidity RH1, the humidity RH inside the preservation container is within a suitable range. At this time, by controlling the air guide plate 86 to rotate so that the plane where the air guide plate 86 is located does not pass through the selectively breathable and moisture-permeable membrane, the cold air supplied into the preservation container from the air inlet 8334 can be prevented from blowing directly onto the selectively breathable and moisture-permeable membrane, thereby preventing the cold air from interfering with the oxygen passing through the selectively breathable and moisture-permeable membrane and thus affecting the oxygen concentration inside the preservation container.

[0652] The modified atmosphere channel connects the modified atmosphere unit 84 and the compartment 82, and supplies preservation gas to the compartment 82, thereby allowing oxygen to pass through the selectively permeable membrane and thus regulating the oxygen concentration inside the preservation container.

[0653] The control system is also used to: when the humidity RH detected by the humidity sensor ≤ the first preset humidity RH1, control the oxygen supply module to supply the air volume of Vq1 into the compartment 82, and control the air guide plate 86 to rotate to be parallel to the selectively breathable and moisture-permeable membrane. In this way, when the humidity RH in the fresh-keeping container is within a suitable range, by controlling the air guide plate 86 to rotate to be parallel to the selectively breathable and moisture-permeable membrane, it is possible to prevent the cold air supplied into the fresh-keeping container from the air inlet 8334 from blowing towards the selectively breathable and moisture-permeable membrane, thereby preventing the cold quantity from dissipating from the selectively breathable and moisture-permeable membrane, and also improving the uniformity of the distribution of cold air and oxygen in the fresh-keeping container.

[0654] The control system is also used to: when the humidity RH detected by the humidity sensor ≤ the first preset humidity RH1, control the oxygen supply module to supply the air volume of Vq2 into the compartment 82, and control the air guide plate 86 to rotate so that the intersection line of the plane where the air guide plate 86 is located and the cover plate is on the side of the selectively breathable and moisture-permeable membrane away from the first wall 853; where Vq2 > Vq1. In this way, it is possible to avoid excessive humidity while ensuring the oxygen concentration inside the fresh-keeping container.

[0655] The control system is also used to:

[0656] When RH > the first preset humidity RH1, control the air supply volume of the refrigeration system to supply air into the fresh-keeping container to be Vf1, and control the oxygen supply module to supply the air volume of Vq3 into the compartment 82;

[0657] When the second preset humidity RH2 < RH ≤ RH1, control the air supply volume of the refrigeration system to supply air into the fresh-keeping container to be Vf2, and control the oxygen supply module to supply the air volume of Vq4 into the compartment 82;

[0658] When RH ≤ RH2, control the air supply volume of the refrigeration system to supply air into the fresh-keeping container to be Vf3, and control the oxygen supply module to supply the air volume of Vq4 into the compartment 82;

[0659] Where, Vf1 > Vf2 > Vf3, Vq3 > Vq4.

[0660] In this way, it is possible to adjust the supply air volume of the fresh-keeping gas supplied into the compartment 82 and the cold air supply volume supplied into the fresh-keeping container according to the humidity in the fresh-keeping container, thereby realizing the adjustment of the humidity, temperature, and oxygen concentration in the fresh-keeping container to make them reach an ideal range, and also avoiding condensation or frosting in the fresh-keeping container.

[0661] In summary, the refrigeration appliance of this application supplies preservative gas to the interior of compartment 82 through a controlled atmosphere channel. The selectively permeable membrane 831 allows oxygen from the preservative gas supplied to compartment 82 to enter the interior of the preservation container, creating an oxygen-rich environment where the oxygen concentration inside the container is greater than that in the air, or allowing oxygen to escape through the selectively permeable membrane 831, creating an oxygen-deficient environment where the oxygen concentration inside the container is less than that in the air. Both oxygen-rich and oxygen-deficient environments improve the preservation effect on food. Furthermore, the angle of the air guide plate 86 relative to the selectively permeable membrane can be controlled according to the humidity (RH) inside the preservation container. This controls whether the cold air supplied from the air inlet 8334 directly blows onto the selectively permeable membrane, thereby regulating the humidity inside the preservation container and keeping it within a preset range.

[0662] Referring to Figures 40 to 50, the fourth embodiment of this application provides a refrigeration appliance 9100, which includes a housing 91, an inner liner 911, and a casing 912 disposed outside the inner liner 911. A compartment 9111 is defined within the inner liner 911.

[0663] The refrigeration appliance 9100 also includes a refrigeration system and a cold air duct, the cold air duct connecting the refrigeration system and the room 9111 and supplying cold air to the room 9111.

[0664] The refrigeration system includes a compressor, condenser, throttling device, and evaporator connected in sequence.

[0665] As shown in Figures 41 and 44, the refrigeration appliance 9100 also includes a controlled atmosphere unit 92, which is used to prepare a preservative gas and supply the preservative gas to the interior of the compartment 9111.

[0666] Thus, by supplying preservative gas, such as oxygen, to the interior of compartment 9111 through the controlled atmosphere unit 92, the oxygen concentration inside compartment 9111 can be regulated. Specifically, the oxygen concentration in compartment 9111 can be increased or decreased. This further improves the preservation effect of the refrigeration appliance 9100.

[0667] The refrigeration appliance 9100 also includes a controller, which is connected to the refrigeration system and the controlled atmosphere unit 92 respectively, and is used for:

[0668] Control the start of the refrigeration system to supply air into room 9111;

[0669] The controlled atmosphere unit 92 is activated to deliver preservative gas into compartment 9111;

[0670] The air supply of the control atmosphere unit 92 and the air volume of the refrigeration system are gradually reduced in a stepwise manner.

[0671] In this way, by controlling the gas supply of the controlled atmosphere unit 92 and the air supply of the refrigeration system to gradually decrease in a stepwise manner, the influence of the air supply of the refrigeration system on the preservation gas delivered by the controlled atmosphere unit 92 can be reduced, thereby preventing the oxygen concentration in the compartment 9111 from deviating from its preset oxygen-rich environment or its preset oxygen-deficient environment, and further improving the preservation effect of the compartment 9111.

[0672] This application also provides a control method for a refrigeration appliance 9100, which includes:

[0673] Control the start of the refrigeration system to supply air into room 9111;

[0674] The controlled atmosphere unit 92 is activated to deliver preservative gas into compartment 9111;

[0675] The air supply of the control atmosphere unit 92 and the air volume of the refrigeration system are gradually reduced in a stepwise manner.

[0676] This control method regulates the oxygen concentration inside the compartment 9111 by controlling the supply of preservative gas to the compartment 9111 through the controlled atmosphere unit 92, thereby improving the preservation effect inside the compartment 9111. Furthermore, by controlling the gas supply of the controlled atmosphere unit 92 and the air volume of the refrigeration system to gradually decrease in a stepwise manner, the influence of the air volume of the refrigeration system on the preservative gas delivered by the controlled atmosphere unit 92 can be reduced, thereby preventing the oxygen concentration in the compartment 9111 from deviating from its preset oxygen-rich environment or its preset oxygen-deficient environment, and further improving the preservation effect of the compartment 9111.

[0677] The refrigeration appliance 9100 also includes a controlled atmosphere channel that connects the controlled atmosphere unit 92 and the compartment 9111 and delivers preservative gas to the compartment 9111.

[0678] The refrigeration appliance 9100 also includes a power supply and a controller connected to the controlled atmosphere unit 92.

[0679] The principle and structure of the modified atmosphere unit 92 for preparing the preservative gas can be found in the first to third embodiments described above.

[0680] Furthermore, the controller is also used to control the air supply of the air conditioning unit 92 and the air volume of the refrigeration system to gradually decrease in a stepwise manner according to the running time.

[0681] The control method also includes: controlling the air supply of the air conditioning unit 92 and the air volume of the refrigeration system to gradually decrease in a stepwise manner according to the running time.

[0682] In this way, rapid cooling can be achieved in the initial stage through a large air volume, while a large air supply is used to provide a large amount of preservative gas to the compartment 9111 to maintain the oxygen concentration in the compartment 9111. This prevents the gas in the compartment 9111 from being carried out of the compartment 9111 by the cold air circulation return air, thus avoiding the oxygen concentration in the compartment 9111 from deviating from its preset oxygen-rich environment or its preset oxygen-deficient environment. As time goes on, the temperature in the compartment 9111 gradually decreases. By controlling the air volume of the refrigeration system to decrease in a stepwise manner, the temperature in the compartment 9111 can be gradually brought to the preset temperature, reducing energy consumption and saving costs. As time goes on, the oxygen concentration in the compartment 9111 gradually approaches its preset concentration. By controlling the air supply of the controlled atmosphere unit 92 to decrease in a stepwise manner, the oxygen concentration in the compartment 9111 can be gradually brought to the preset concentration, reducing energy consumption and saving costs.

[0683] In one embodiment, the controller is also configured to: control the controlled atmosphere unit 92 and the refrigeration system to start and run simultaneously.

[0684] The control method also includes: controlling the controlled atmosphere unit 92 and the refrigeration system to start and run simultaneously.

[0685] By controlling the simultaneous start-up and operation of the controlled atmosphere unit 92 and the refrigeration system, the temperature and oxygen concentration in the compartment 9111 can be synchronously regulated to reduce the impact of the air supply of the refrigeration system on the preservation gas delivered by the controlled atmosphere unit 92, thereby preventing the oxygen concentration in the compartment 9111 from deviating from its preset oxygen-rich environment or its preset oxygen-deficient environment.

[0686] Furthermore, the controller is also used for:

[0687] When the controlled atmosphere unit 92 and the refrigeration system start simultaneously, the timing begins, and the air supply of the controlled atmosphere unit 92 is controlled to Vq1, and the air supply of the refrigeration system is controlled to Vf1.

[0688] After time t1, the gas supply of the control atmosphere unit 92 is Vq2;

[0689] After time t2, the air supply volume of the refrigeration system is controlled to be Vf2;

[0690] After time t3, the air supply of the control atmosphere unit 92 is Vq3, and the air volume of the control refrigeration system is Vf3.

[0691] Among them, Vq1>Vq2>Vq3, Vf1>Vf2>Vf3.

[0692] In the initial stage, rapid cooling is achieved through a large air volume, while a large air supply is used to provide a large amount of preservative gas to compartment 9111. This not only achieves rapid cooling but also prevents oxygen in compartment 9111 from being carried out of the compartment, thus avoiding deviation of the oxygen concentration in compartment 9111 from its preset oxygen-rich environment or its preset oxygen-deficient environment, thereby rapidly inhibiting microbial growth. After the controlled atmosphere unit 92 operates at an air supply volume of Vq1 and the refrigeration system operates at an air supply volume of Vf1 for a time t1, the oxygen concentration in compartment 9111 has been adjusted to its preset oxygen-rich environment or its preset oxygen-deficient environment. At this point, controlling the air supply volume of the controlled atmosphere unit 92 to reduce to Vq2 can reduce the operating cost of the controlled atmosphere unit 92. Controlling the controlled atmosphere unit 92 to operate at an air supply volume of Vq2 for a time t... After step 2, the temperature in compartment 9111 drops to a certain level, at which point the growth of microorganisms is effectively controlled. At this point, the airflow of the refrigeration system is reduced to Vf2, which slows down the cooling rate in compartment 9111, preventing food from freezing and forming ice crystals, thus avoiding irreversible damage to the food's texture. This also reduces the operating cost of the refrigeration system. After the refrigeration system operates at an airflow of Vf2 for time t3, the temperature in compartment 9111 approaches the preset temperature, and the oxygen concentration approaches its preset concentration. At this point, the air supply of the controlled atmosphere unit 92 is reduced to Vq3, and the airflow of the refrigeration system is reduced to Vf3. This maintains the temperature and oxygen concentration in compartment 9111 at the preset temperature, further reducing operating costs and saving energy.

[0693] In another embodiment, the controller is also used to: control the refrigeration system to start and run after the controlled atmosphere unit 92 has started and run for a preset time.

[0694] The control method also includes: controlling the refrigeration system to start and run after the controlled atmosphere unit 92 has been started and running for a preset time.

[0695] By controlling the atmosphere control unit 92 to run for a preset time, the oxygen concentration in the chamber 9111 can be regulated first, and then the refrigeration system can be started and run. This avoids the air supply of the refrigeration system from having a significant impact on the oxygen concentration in the chamber 9111, and prevents the oxygen concentration in the chamber 9111 from deviating from its preset oxygen-rich environment or its preset oxygen-deficient environment.

[0696] Furthermore, the controller is also used for:

[0697] The control atmosphere unit 92 is started and operates with an air supply of Vq1;

[0698] After time t1, the refrigeration system is started and runs with an air supply volume of Vf1, and the air supply volume of the air conditioning unit 92 is controlled to be Vq2.

[0699] After time t2, the air supply volume of the refrigeration system is controlled to be Vf2;

[0700] After time t3, the air supply of the control atmosphere unit 92 is Vq3, and the air volume of the control refrigeration system is Vf3.

[0701] Among them, Vq1>Vq2>Vq3, Vf1>Vf2>Vf3.

[0702] In the initial stage, a large amount of preservative gas is supplied to compartment 9111 to rapidly bring the oxygen concentration in compartment 9111 close to the target concentration, thereby quickly inhibiting microbial growth. After the controlled atmosphere unit 92 operates at an air supply rate of Vq1 for a time t1, the oxygen concentration in compartment 9111 is adjusted to its preset oxygen-rich environment or its preset oxygen-deficient environment. At this time, the refrigeration system is started and operates at an air supply rate of Vf1, which not only rapidly cools the temperature but also prevents large fluctuations in the oxygen concentration in compartment 9111 from deviating from its preset oxygen-rich environment or its preset oxygen-deficient environment. At the same time, controlling the air supply rate of the controlled atmosphere unit 92 to reduce to Vq2 can reduce the operating cost of the controlled atmosphere unit 92. Controlling the air supply rate of the controlled atmosphere unit 92 to Vq2 and the air supply rate of Vq2 and the air supply rate of Vf1 can further reduce the operating cost of the controlled atmosphere unit 92. After the refrigeration system operates at an air supply volume of Vf1 for time t2, the temperature in compartment 9111 drops to a certain level. At this point, the growth of microorganisms is effectively controlled. Reducing the air supply volume of the refrigeration system to Vf2 at this time reduces the cooling rate in compartment 9111, preventing food from freezing and forming ice crystals, thus avoiding irreversible damage to the food's texture and reducing the operating cost of the refrigeration system. After the refrigeration system operates at an air supply volume of Vf2 for time t3, the temperature in compartment 9111 approaches the preset temperature, and the oxygen concentration approaches its preset concentration. At this time, reducing the air supply volume of the controlled atmosphere unit 92 to Vq3 and the air supply volume of the refrigeration system to Vf3 maintains the temperature and oxygen concentration in compartment 9111 at the preset temperature and concentration, further reducing operating costs and saving energy.

[0703] Specifically, Vf1 satisfies the following condition: the temperature inside compartment 9111 reaches the first preset temperature T1;

[0704] Vf2 satisfies the following condition: the temperature inside chamber 9111 reaches the second preset temperature T2;

[0705] Vf3 satisfies the condition that the temperature inside compartment 9111 is maintained at T2;

[0706] Where T1 > T2.

[0707] Before the temperature in the compartment 9111 drops to T1, microbial growth can be rapidly inhibited through rapid cooling; when the temperature in the compartment 9111 drops to T1, the growth of microorganisms has been effectively controlled. After dropping below T1, the cooling rate is reduced, and the temperature is slowly cooled to T2 to prevent the ingredients from freezing and generating ice crystals, so as to avoid irreversible effects on the texture of the ingredients.

[0708] In one embodiment, the preset concentration of oxygen in the compartment 9111 is greater than the oxygen concentration in the air, that is, the environment in the compartment 9111 is an oxygen-rich environment. Thus, Vq1 satisfies: making the oxygen concentration in the compartment 9111 reach c1; Vq2 satisfies: making the oxygen concentration in the compartment 9111 reach c2; Vq3 satisfies: making the oxygen concentration in the compartment 9111 reach c3; and c1>c2>c3. That is, by controlling the oxygen concentration in the compartment 9111 to gradually decrease over time according to c1, c2, c3, the air supply volume of the refrigeration system can be coordinated to prevent the oxygen concentration in the compartment 9111 from dropping below the preset concentration and becoming an oxygen-poor environment.

[0709] In another embodiment, the preset concentration of oxygen in the compartment 9111 is less than the oxygen concentration in the air, that is, the environment in the compartment 9111 is an oxygen-poor environment. Thus, Vq1 satisfies: making the oxygen concentration in the compartment 9111 reach c1; Vq2 satisfies: making the oxygen concentration in the compartment 9111 reach c2; Vq3 satisfies: making the oxygen concentration in the compartment 9111 reach c3; and c1<c2<c3. By controlling the oxygen concentration in the compartment 9111 to gradually increase over time according to c1, c2, c3, the air supply volume of the refrigeration system can be coordinated to prevent the oxygen concentration in the compartment 9111 from rising above the preset concentration and becoming an oxygen-rich environment.

[0710] Among them, a temperature sensor is provided in the compartment 9111 to detect the temperature in the compartment 9111 in real time.

[0711] The controller is connected to the temperature sensor and is used for: obtaining the temperature in the compartment 9111 detected by the temperature sensor.

[0712] An oxygen concentration sensor is provided in the compartment 9111 to detect the oxygen concentration in the compartment 9111 in real time.

[0713] The controller is connected to the oxygen concentration sensor and is used for: obtaining the oxygen concentration in the compartment 9111 detected by the oxygen concentration sensor.

[0714] In one embodiment, the air supply of the air conditioning unit 92 can be adjusted by controlling the operating power of the air conditioning unit 92, and the air supply of the air conditioning unit 92 is positively correlated with its operating power; in another embodiment, the air supply of the air conditioning unit 92 can also be adjusted by controlling the operating current of the air conditioning unit 92, and the air supply of the air conditioning unit 92 is positively correlated with its operating current; in yet another embodiment, the air supply of the air conditioning unit 92 can also be adjusted by controlling the opening angle of the air passage valve of the air conditioning unit 92, and the air supply of the air conditioning unit 92 is positively correlated with the opening angle of its air passage valve.

[0715] In one embodiment, the air volume of the refrigeration system is adjusted by controlling the speed of the compressor, and the air volume of the refrigeration system is positively correlated with the speed of the compressor; in another embodiment, the air volume of the refrigeration system is adjusted by controlling the opening angle of the damper, and the air volume of the refrigeration system is positively correlated with the opening angle of the damper.

[0716] Referring to Figures 41 to 44, in one embodiment, the refrigeration appliance 9100 includes a food storage container 93a and a drawer 94. The food storage container 93a has a first opening 931a, and the drawer 94 has a second opening 941. The drawer 94 is housed in the food storage container 93a. The first opening 931a faces the inner wall of the food storage container 93a. The drawer 94 has a first door panel 942 for opening or closing the first opening 931. By pulling out the first door panel 942, the drawer 94 can move relative to the food storage container 93. When the drawer 94 moves to the point where the second opening 941 is at least partially exposed to the external environment, it allows the user to store and retrieve food items from the drawer 94.

[0717] The first door panel 942 and the food storage container 93a together enclose the room 9111.

[0718] In this way, the temperature and oxygen concentration in compartment 9111 can be controlled simultaneously to give compartment 9111 a better preservation effect. Moreover, the structure of compartment 9111 is simple and easy to produce.

[0719] The opening directions of the first opening 931a and the second opening 941 are different. Preferably, the opening directions of the first opening 931a and the second opening 941 are perpendicular to each other. This facilitates the processing of the food storage container 93a and the drawer 94, improves feasibility, and also makes it easier for the first door panel 942 to drive the drawer 94 to move relative to the food storage container 93a, so as to store and retrieve items.

[0720] Referring to Figure 47, in another embodiment, the refrigeration appliance 9100 includes a preservation cylinder 93b and a preservation container 95, which is housed within the preservation cylinder 93b and encloses a compartment 9111. To distinguish it from the preceding compartment 9111, the compartment enclosed by the preservation container 95 can be referred to as the second compartment 9111.

[0721] The preservation container 95 has a cold air passage, and the refrigeration system supplies cold air to the outside of the preservation container 95. The cold air passage connects the inside and outside of the preservation container 95, so that the refrigeration system supplies cold air to the inside of the preservation container 95, that is, the second compartment 9111. The controlled atmosphere unit 92 delivers preservation gas to the inside of the preservation container 95, that is, the second compartment 9111.

[0722] Through this structural design, the controlled atmosphere unit 92 delivers preservative gas into the preservation container 95, thereby regulating the oxygen concentration inside the container. The moisture in the preservative gas increases the humidity within the container, delaying the drying of the food and improving its preservation effect. A refrigeration system supplies cold air to the outside of the container, which circulates outside, carrying away some of the heat and cooling the container. This prevents excessive cold air from entering the container and interfering with the preservative gas, thus avoiding undesirable fluctuations in oxygen concentration and preventing the food from drying out, thus maintaining the preservation effect. A portion of the cold air is also delivered into the container through a cold air channel, preventing excessive moisture in the preservative gas from causing condensation and frost inside the container.

[0723] Specifically, the food preservation container 93b has a first opening 931b, and the food preservation container 95 includes a box body 951 and a cover plate 952. The box body 951 has a third opening 9511, which faces the inner wall of the food preservation container 93b. The cover plate 952 covers the third opening 9511.

[0724] The opening directions of the first opening 931b and the third opening 9511 are different. Preferably, the opening directions of the first opening 931b and the third opening 9511 are perpendicular to each other. This facilitates the processing of the food preservation cylinder 93b and the food preservation container 95, improves feasibility, and also makes it easier for the second door panel 953 to drive the food preservation container 95 to move relative to the food preservation cylinder 93b, so as to store and retrieve items.

[0725] The food storage container 95 also includes a second door panel 953, which is connected to the container body 951b and is used to open or close the first opening 931b. By pulling the second door panel 953, the container body 951 can move relative to the food storage tube 93b. When the container body 951 moves to the point where the third opening 9511 is at least partially exposed to the external environment, the user can store and retrieve food into the container body 951.

[0726] The cover plate 952 is fixedly connected to the food storage container 93b. When the box body 951 moves relative to the food storage container 93b, the position of the cover plate 952 relative to the food storage container 93b remains unchanged. When the box body 951 moves to the point where the third opening 9511 is completely inside the food storage container 93b, the cover plate 952 closes the box body 951.

[0727] Referring to Figures 45 to 47, the food preservation container 95 also includes a connecting part 954, which connects the box body 951 and the second door panel 953.

[0728] The connecting part 954 is provided with multiple ventilation openings 9541. In this way, after the cold air enters the preservation container 93, most of it flows towards the second door panel 953 through the space between the cover plate 952 and the preservation container 93b. After flowing to the position near the second door panel 953, it flows through the multiple ventilation openings 9541 into the space between the box body 951 and the second door panel 953. Then it flows through the side of the box body 951 away from the cover plate 952, and then flows out of the second compartment 9111 from the side of the box body 951 away from the second door panel 953. In this way, most of the cold air can circulate around the outer periphery of the preservation container 95 before being discharged from the second compartment 9111.

[0729] The cold air passage includes at least one of a slit, a hole 961, and a groove 962.

[0730] In one embodiment, the cold air channel is a slit, specifically, the cold air channel is a narrow slit between the cover plate 952 and the box body 951, through which cold air can be controlled to enter the preservation container 95 in a small amount.

[0731] Referring to Figures 48 to 50, in another embodiment, the cold air channel is at least one of hole 961 and groove 962 to limit the amount of cold air entering the preservation container 95, so as to avoid excessive cold air entering the preservation container 95 and causing fluctuations in the oxygen concentration in the preservation container 95.

[0732] Preferably, multiple cold air channels are provided to increase the amount of cold air entering the preservation container 953 to a certain extent, so as to achieve the effect of preventing condensation and frost formation.

[0733] In summary, the refrigeration appliance 9100 and its control method of this application, by controlling the supply of preservative gas to the compartment 9111 through the controlled atmosphere unit 92, can regulate the oxygen concentration inside the compartment 9111 to improve the preservation effect. Furthermore, by controlling the gas supply of the controlled atmosphere unit 92 and the air supply of the refrigeration system to gradually decrease in a stepwise manner, the influence of the air supply of the refrigeration system on the preservative gas delivered by the controlled atmosphere unit 92 can be reduced, thereby preventing the oxygen concentration in the compartment 9111 from deviating from its preset oxygen-rich environment or its preset oxygen-deficient environment, further improving the preservation effect of the compartment 9111.

[0734] It should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This way of describing the specification is only for clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

[0735] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this application and are not intended to limit the scope of protection of this application. All equivalent implementation methods or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this application.

Claims

1. A refrigeration appliance, characterized in that, include: The enclosure is provided with a compartment and a refrigeration chamber, and the refrigeration chamber is equipped with a refrigeration unit; A preservation container is disposed in the compartment, and an air duct is formed outside the preservation container; The cooling channel connecting the refrigeration chamber and the compartment has an air inlet; the cold air from the refrigeration chamber flows through the air inlet into the compartment and outside the preservation container, and flows along the guide air duct on the outer surface of the preservation container.

2. The refrigeration appliance according to claim 1, characterized in that, The outer surface of the preservation container is provided with a plurality of guide ribs, and the plurality of guide ribs form the air duct. The position of the air inlet corresponds to the air duct.

3. The refrigeration appliance according to claim 2, characterized in that, The enclosure includes an inner liner; The refrigeration appliance includes a door panel and a preservation cylinder assembled in the inner liner. The preservation cylinder surrounds the compartment with an open front. The door panel is movably disposed at the open front and is used to open and close the compartment. The preservation container includes a drawer movably housed within the preservation tube. The drawer includes a box body with a retrieval opening and a cover for opening and closing the retrieval opening. The box body and the door panel are fixedly connected. The plurality of guide ribs are disposed on the outer surface of the drawer.

4. The refrigeration appliance according to claim 3, characterized in that, The air inlet is located on the upper part of the rear wall of the food preservation container and is higher than the cover plate; The plurality of guide ribs include a first guide rib and a second guide rib disposed on the cover plate, wherein the first guide rib and the second guide rib are disposed opposite each other on the left and right sides; The airflow duct is formed between the first airflow guide rib and the second airflow guide rib, and the airflow duct is directly opposite the air inlet to guide the cold air to flow forward along the cover plate.

5. The refrigeration appliance according to claim 3, characterized in that, One of the cover plate and the box body is provided with protruding posts on the left and right sides, and the other is provided with a limit hook; The protruding post is inserted into the limiting hook to restrict the cover plate from moving back and forth with the box body. When the box body is pulled forward from the preservation tube, the cover plate is suspended inside the preservation tube with the cooperation of the protruding post and the limiting hook.

6. The refrigeration appliance according to claim 5, characterized in that, The refrigeration appliance also includes a controlled atmosphere unit and a controlled atmosphere channel, wherein the controlled atmosphere channel is used to deliver preservative gas from the controlled atmosphere unit to the interior of the drawer; The cover plate is provided with a controlled atmosphere inlet, and the controlled atmosphere channel is connected to the interior of the drawer via the controlled atmosphere inlet.

7. The refrigeration appliance according to claim 2, characterized in that, The enclosure includes an inner liner that surrounds the compartment; The preservation container includes a preservation cylinder assembled in the inner liner and a door panel that seals and closes the preservation cylinder, and a plurality of guide ribs are disposed on the outer surface of the preservation cylinder.

8. The refrigeration appliance according to claim 7, characterized in that, The refrigeration appliance also has an air duct cover and a shielding plate, the air duct cover being assembled to the rear wall of the inner liner, and the shielding plate being located above the preservation cylinder; The air inlet is located on the air duct cover plate, and is higher than the top wall of the preservation cylinder and lower than the shielding plate; The plurality of guide ribs include a first guide rib and a second guide rib disposed on the top wall of the preservation cylinder, wherein the first guide rib and the second guide rib are disposed opposite each other on the left and right sides; The airflow duct is formed between the first airflow guide rib and the second airflow guide rib, and the airflow duct is directly opposite the air inlet to guide the cold air to flow forward along the preservation cylinder.

9. The refrigeration appliance according to claim 8, characterized in that, The rear ends of the first guide rib and the second guide rib are respectively located on the outer side of the air inlet in the left-right direction; The airflow duct includes a rearward expansion section and a frontward equal-width section. The width of the expansion section gradually increases from front to back, while the width of the equal-width section remains constant from front to back.

10. The refrigeration appliance according to claim 9, characterized in that, The preservation container is also provided with a window, which connects the interior of the preservation container and the compartment, and the window is exposed in the air duct. The permeable window is covered with a gas-barrier and moisture-permeable membrane, which is configured to allow water vapor to enter or exit the interior of the preservation container in one direction.

11. The refrigeration appliance according to claim 10, characterized in that, The refrigeration appliance also includes: A modified atmosphere unit is located outside the preservation container and is used to generate a preservative gas; A modified atmosphere channel connects the modified atmosphere unit and the interior of the preservation container to allow preservation gas to enter the interior of the preservation container.

12. The refrigeration appliance according to claim 11, characterized in that, The modified atmosphere unit is configured as an electrolytic modified atmosphere unit that forms a preservative gas through an electrochemical reaction, and includes an anode, a cathode, and an inner cavity that can at least contain an electrolyte. One side of the cathode is exposed in the inner cavity and the other side is exposed in the modified atmosphere channel. The cathode is used to consume the oxygen in the modified atmosphere channel through an electrochemical reaction to make the formed preservation gas in an oxygen-deficient state. Alternatively, one or both sides of the anode are exposed in the inner cavity, the modified atmosphere channel connects to the inner cavity, and the anode is used to generate oxygen in the inner cavity through an electrochemical reaction to make the resulting preservation gas oxygen-rich.

13. The refrigeration appliance according to claim 9, characterized in that, The plurality of guide ribs also include a plurality of third guide ribs disposed between the first guide rib and the second guide rib; The third guide rib divides the expansion section into at least two sub-air ducts, which are arranged side by side.

14. The refrigeration appliance according to claim 9, characterized in that, At the expansion section of the airflow duct, at least a portion of the first guide rib and / or the second guide rib is arranged to extend at an angle of 30° to 60° with respect to the front-back direction.

15. The refrigeration appliance according to claim 9, characterized in that, The first guide rib and / or the second guide rib are configured to extend continuously from the rear end to the front end; or, At the equal-width section of the airflow duct, the first guide rib and / or the second guide rib are provided with a plurality of notches and extend intermittently, the notches allowing cold air to be diverted to the left and / or right side of the preservation container.

16. The refrigeration appliance according to claim 1, characterized in that, The refrigeration appliance includes a temperature sensor, which is installed on the preservation container and located outside the air duct.

17. The refrigeration appliance according to claim 16, characterized in that, The preservation container has a modified atmosphere inlet, and the modified atmosphere channel is connected to the interior of the preservation container via the modified atmosphere inlet; The controlled atmosphere inlet and the temperature sensor are arranged adjacent to each other; The preservation container also has a surrounding panel that surrounds the modified atmosphere inlet and the temperature sensor and protrudes from the outer surface of the preservation container relative to the flow guide ribs.

18. The refrigeration appliance according to claim 1, characterized in that, The preservation container is also provided with a window, which connects the interior of the preservation container and the compartment, and the window is exposed in the air duct. The permeable window is covered with a gas-barrier and moisture-permeable membrane, which is configured to allow water vapor to enter or exit the interior of the preservation container in one direction.

19. The refrigeration appliance according to claim 1, characterized in that, The cooling aisle can also connect to the interior of the preservation container to supply cold air to the interior of the preservation container; the refrigeration appliance also includes: Controlled atmosphere unit; A modified atmosphere channel connects the modified atmosphere unit and the interior of the preservation container and supplies preservation gas to the interior of the preservation container.

20. A control method for a refrigeration appliance according to claim 1, characterized in that, include: S101, determine whether the humidity value inside the preservation container is greater than the first humidity threshold. If yes, execute S102; otherwise, repeat S101. S102, determine whether the internal temperature of the preservation container is lower than the preservation temperature threshold. If yes, proceed to S103; otherwise, proceed to S104. S103, after the refrigerator stops operating for a preset time, the residual cold of the refrigerator is blown into the compartment and outside the preservation container until the humidity value drops to the second humidity threshold, and then returns to S101; S104, control the operation of the refrigeration unit to blow the cold air from the refrigeration unit into the compartment and outside the preservation container until the humidity value drops to the second humidity threshold, and return to S101.

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