Refrigeration appliance and control method thereof

Abstract

The invention provides a refrigeration appliance. The refrigerating appliance comprises a box body, a refrigerating device and a control device, wherein the box body is provided with a chamber; the fresh-keeping container is arranged in the compartment, the fresh-keeping container comprises a main body and an adapting piece mounted on the main body, and the adapting piece is provided with a mounting groove and a gas inlet communicating the inside and the outside of the fresh-keeping container; the gas adjusting unit is arranged outside the fresh-keeping container and is used for forming fresh-keeping gas; the air-conditioning channel is communicated with the air-conditioning unit, one tail end of the air-conditioning channel is arranged at the air inlet so as to be communicated with the interior of the fresh-keeping container, and fresh-keeping air enters the interior of the fresh-keeping container through the air-conditioning channel; and the temperature sensor is fixedly mounted in the mounting groove and is used for sensing the internal temperature of the fresh-keeping container. Therefore, the problems of temperature sensing and fresh-keeping gas introduction can be solved, temperature control in the fresh-keeping container is facilitated, and the temperature stability is improved.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and more specifically to a refrigeration appliance and its control method. Background Technology

[0002] 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.

[0003] 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.

[0004] In the field of modified atmosphere storage, a preservative gas with low oxygen content, for example, containing less than 21% oxygen by volume, can be introduced into a closed space; or a preservative gas with high oxygen content, for example, containing more than 21% oxygen by volume, can be introduced into a closed space.

[0005] Meanwhile, in refrigeration appliances, in addition to regulating the gas atmosphere, temperature control is also necessary. Therefore, in refrigeration appliances with modified atmosphere storage technology, it is difficult to simultaneously address the issues of temperature sensor placement and the introduction of preservative gases, as the introduction of preservative gases can cause temperature fluctuations. Thus, how to ensure the introduction of preservative gases while effectively controlling temperature and improving temperature control performance is a significant technical challenge. Summary of the Invention

[0006] In view of the above-mentioned technical problems, the purpose of this invention is to provide a refrigeration appliance and its control method.

[0007] To achieve the above objectives, one embodiment provides a refrigeration appliance. The refrigeration appliance includes:

[0008] The container is equipped with compartments;

[0009] A preservation container is disposed in the 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 gas inlet communicating with the inside and outside of the preservation container.

[0010] A modified atmosphere unit is located outside the preservation container and is used to generate a preservative gas;

[0011] A modified atmosphere channel connects to the modified atmosphere unit, and one end is disposed at the gas inlet to connect to the interior of the preservation container. Preservation gas enters the interior of the preservation container through the modified atmosphere channel.

[0012] A temperature sensor is fixedly installed in the mounting slot and is used to sense the internal temperature of the preservation container.

[0013] Preferably, the mounting groove 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.

[0014] Preferably, the fitting includes a surrounding plate that surrounds the gas inlet and the mounting groove and protrudes from the outer surface of the body.

[0015] Preferably, the enclosure surrounds an opening that exposes the mounting groove and the gas inlet;

[0016] The temperature sensor is installed from the outside of the preservation container into the mounting slot via the opening;

[0017] The refrigeration appliance also has a seal that closes the opening.

[0018] Preferably, the end of the controlled atmosphere channel is configured as a pipe connector, which is plugged into the gas interface.

[0019] Preferably, the housing is further provided with a refrigeration compartment, and a refrigeration unit is installed inside the refrigeration compartment;

[0020] The refrigeration appliance includes a cooling channel that connects the refrigeration chamber and the compartment, allowing cold air from the refrigeration chamber to flow into the compartment and outside the preservation container.

[0021] Preferably, the cooling aisle has an air inlet exposed in the compartment, through which cold air from the cooling aisle enters the compartment;

[0022] 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.

[0023] Preferably, the connector is disposed outside the airflow duct.

[0024] 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.

[0025] Preferably, the main body is further provided with a window, the window connecting the interior of the preservation container and the compartment, and the window is exposed in the air duct.

[0026] 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.

[0027] Preferably, the refrigeration appliance further includes a damper and a fan disposed between the refrigeration chamber and the air inlet; the refrigeration appliance includes:

[0028] A humidity sensor is installed inside the food preservation container to sense the humidity value inside the food preservation container;

[0029] A controller, connected to the humidity sensor and the temperature sensor, is used to control the start and stop of the cooler, the opening and closing of the damper, and the start and stop of the fan based on the humidity value and / or the internal temperature.

[0030] Preferably, the controller is configured to, when the humidity value is greater than a 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 has stopped operating for a preset time, until the humidity value drops to a 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.

[0031] Preferably, the refrigeration appliance further includes a damper and a fan disposed between the refrigeration chamber and the air inlet; the refrigeration appliance further includes:

[0032] A gas concentration sensor is disposed inside the preservation container to detect the concentration of a target gas inside the preservation container;

[0033] A controller, connected to the gas concentration sensor and the temperature sensor, 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 damper and the start and stop of the fan according to the target gas concentration and / or the internal temperature.

[0034] 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 / 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 a 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 a 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.

[0035] Wherein, 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.

[0036] 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 the compartment with an open front, and the door panel is movably disposed at the open front and used to open and close the compartment;

[0037] The main body is configured as a drawer movably housed within the food storage container. The drawer includes a box body with an upper opening for retrieving items and a cover plate for opening and closing the opening for retrieving items. The box body and the door plate are fixedly connected.

[0038] Preferably, the connector is fixedly installed on the cover plate, and the end of the modified atmosphere channel is fixedly disposed on the preservation cylinder and inserted into the gas inlet from the top and bottom.

[0039] Preferably, the box body 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 piece is fixedly installed on the preservation cylinder.

[0040] Preferably, the modified atmosphere unit is configured as an electrolytic modified atmosphere unit that forms a preservative gas through an electrochemical reaction, comprising an anode, a cathode, and an inner cavity capable of containing at least 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 formed preservation gas in an oxygen-deficient state.

[0042] 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 formed preservation gas oxygen-rich.

[0043] To achieve the above objectives, one embodiment provides a control method for the aforementioned refrigeration appliance. The control method includes:

[0044] S101, determine whether the humidity value inside the preservation container is greater than the first humidity threshold. If yes, execute S102; otherwise, repeat S101.

[0045] 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.

[0046] 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;

[0047] 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.

[0048] To achieve the above objectives, one embodiment provides a control method for the aforementioned refrigeration appliance. The control method includes:

[0049] 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.

[0050] 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.

[0051] S203, control the refrigerator to turn on so that the cold air from the refrigerator is blown into the compartment and outside the preservation container until the internal temperature drops to the shutdown temperature threshold, and return to S201;

[0052] 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.

[0053] S205, control the refrigerator to turn on so as to blow the cold air from the refrigerator 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.

[0054] Wherein, 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.

[0055] Compared with the prior art, the beneficial effects of one embodiment of the present invention 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 gas inlet for connecting a controlled 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 gas 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 controlled atmosphere function; in addition, this can use only a single temperature sensor, which can, to a certain extent, coordinate the monitoring of the temperature inside a preservation container and the temperature of the preservation gas, thus saving costs. Attached Figure Description

[0056] Figure 1 This is a schematic diagram of the structure of a refrigeration appliance according to an embodiment of the present invention;

[0057] Figure 2 This is a schematic block diagram showing the fluid connection between the controlled atmosphere unit and two preservation containers of a refrigeration appliance according to an embodiment of the present invention.

[0058] Figure 3 This is an exploded view of a portion of the structure of a refrigeration appliance according to an embodiment of the present invention;

[0059] Figure 4 This is a schematic diagram of the structure of a connector according to an embodiment of the present invention;

[0060] Figure 5 This is a schematic diagram of the structure of a controlled atmosphere unit according to an embodiment of the present invention;

[0061] Figure 6 It is along Figure 5 A cross-sectional view of the DD section line;

[0062] Figure 7 This is an exploded view of a portion of the structure of a refrigeration appliance according to an embodiment of the present invention;

[0063] Figure 8 This is a schematic diagram of a partial structure of a refrigeration appliance according to an embodiment of the present invention;

[0064] Figure 9 yes Figure 8 A partial sectional view of the EE section line;

[0065] Figure 10 This is a schematic diagram of the food storage container and other components according to an embodiment of the present invention from the rear view.

[0066] Figure 11 yes Figure 8 A partial cross-sectional view of section line AA in the middle;

[0067] Figure 12 is Figure 8 a partial sectional view taken along the cutting plane line B-B in

[0068] Figure 13 is Figure 8 a partial sectional view taken along the cutting plane line C-C in

[0069] Figure 14 a schematic structural view of a second fresh-keeping container according to an embodiment of the present invention;

[0070] Figure 15 a control logic flow chart of temperature and humidity by a controller according to an embodiment of the present invention;

[0071] Figure 16 a control logic flow chart of temperature and oxygen concentration by a controller according to an embodiment of the present invention. Detailed Embodiments

[0072] The present application will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present application, and any structural, method, or functional transformation made by those of ordinary skill in the art based on these embodiments is included within the scope of protection of the present application.

[0073] In each of the diagrams of the present application, for the convenience of illustration, certain dimensions of the structure or part are exaggerated relative to other structures or parts. Therefore, it is only used to illustrate the basic structure of the subject matter of the present application.

[0074] Spatial relative position terms used herein, such as "upper", "above", "lower", "below", etc., are for the purpose of facilitating description of the relationship of one unit or feature to another unit or feature as shown in the accompanying drawings. The spatial relative position terms are intended to include different orientations of the device in use or operation other than the orientation shown in the figures. For example, if the device in the figures is flipped, the unit described as being "below" or "beneath" another unit or feature will be located "above" the other unit or feature. Therefore, the exemplary term "below" can encompass both the upper and lower orientations. The device can be oriented in other ways (rotated 90 degrees or other orientations), and the spatially related descriptive terms used herein can be interpreted accordingly.

[0075] Referring Figures 1 to 3 to

[0076] in the illustration, the refrigeration appliance 100 is specifically configured as a refrigerator, which can be a household refrigerator or can be used as a commercial refrigerator.

[0077] The basic structure of the refrigeration appliance 100 of the present invention will be described below. Specifically, the refrigeration appliance 100 includes a cabinet 10, a door 20, a refrigeration system, a controlled atmosphere unit 60, a first preservation container 500B, a first controlled atmosphere channel 70B, a first temperature sensor, a second preservation container 500, a second controlled atmosphere channel 70, and a second temperature sensor.

[0078] 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; the inner liner 12 is fitted inside the shell 11 and spaced apart from the shell 11 to form a space between the shell 11 and the inner liner 12; the insulation layer fills the space, and specifically, the insulation layer may include insulation board and foam material.

[0079] The cabinet 10 has multiple compartments, such as a first compartment 101 and a second compartment 103. The first compartment 101 can be configured as a refrigerator compartment or a freezer compartment, and the second compartment 103 can be a fresh-keeping compartment that is separate from the first compartment 101.

[0080] The number of doors 20 is set to one or more. The doors 20 are movably connected to the front side of the housing 10 and are used to open and close the first compartment 101.

[0081] The refrigeration system includes a cooler for providing cooling capacity to the refrigeration appliance 100 in order to maintain a low-temperature storage environment in the first compartment 101 and the second compartment 103.

[0082] The specific structure of the refrigeration system can be implemented in various ways in the art. 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 absorbs and releases heat 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.

[0083] The first preservation container 500B is disposed in the first compartment 101, which is generally sealed.

[0084] The second preservation container 500 is located in the second compartment 103, which is also generally sealed.

[0085] The modified atmosphere unit 60 is configured to generate a preservative gas, and its location is preferably outside the first preservation container 500B and the second preservation container 500. For example, the modified atmosphere unit 60 may be located inside the inner liner 12 (e.g., in the first 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 spirit of the invention.

[0086] The first modified atmosphere channel 70B connects the interior of the modified atmosphere unit 60 and the interior of the first preservation container 500B, so that the preservation gas generated by the modified atmosphere unit 60 enters the interior of the first preservation container 500B through the first modified atmosphere channel 70B, thereby forming a modified atmosphere preservation environment inside the first preservation container 500B.

[0087] Similarly, the second modified atmosphere channel 70 connects the interior of the modified atmosphere unit 60 and the second preservation container 500, so that the preservation gas generated by the modified atmosphere unit 60 can enter the interior of the second preservation container 500 through the second modified atmosphere channel 70, thereby forming a modified atmosphere preservation environment inside the second preservation container 500.

[0088] In this application, the first preservation container 500B includes a first body and a first fitting 51B installed on the first body.

[0089] Similarly, the second preservation container 500 includes a second body and a second fitting 51 mounted on the second body.

[0090] The first mating member 51B and the second mating member 51 have the same or similar structures, such as... Figure 4 As shown, both are equipped with an installation slot 420 and a gas inlet 424.

[0091] The first fitting 51B has the first temperature sensor fixedly installed in its mounting groove 420. The first temperature sensor can be used to sense the internal temperature T1 of the first preservation container 500B. Its gas inlet 424 connects the inside and outside of the first preservation container 500B so that the first modified atmosphere channel 70B can send the preservation gas into the first preservation container 500B.

[0092] Specifically, the first modified atmosphere channel 70B is connected to the modified atmosphere unit 60, and its first end is disposed at the gas inlet 424 of the first connector 51B to connect to the interior of the first preservation container 500B. The preservation gas enters the interior of the first preservation container 500B through the first modified atmosphere channel 70B at the gas inlet 424 of the first connector 51B.

[0093] The second fitting 51 has a second temperature sensor fixedly installed in its mounting groove 420. The second temperature sensor can be used to sense the internal temperature T2 of the second preservation container 500. Its gas inlet 424 connects the inside and outside of the second preservation container 500 so that the second modified atmosphere channel 70 can send preservation gas into the second preservation container 500.

[0094] Specifically, the second modified atmosphere channel 70 is connected to the modified atmosphere unit 60, and its first end is disposed at the gas inlet 424 of the second connector 51 to connect to the interior of the second preservation container 500. The preservation gas enters the interior of the second preservation container 500 through the second modified atmosphere channel 70 at the gas inlet 424 of the second connector 51.

[0095] Thus, the refrigeration appliance of the present invention, by providing a connecting member on the main body of the preservation container (e.g., the first preservation container 500B or the second preservation container 500), and the connecting member integrating a mounting groove 420 for fixing a temperature sensor (e.g., the first temperature sensor or the second temperature sensor) and a gas inlet 424 for connecting a controlled atmosphere channel (e.g., the first controlled atmosphere channel 70B or the second controlled 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 gas inlet 424. 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., the first preservation container 500B or the second preservation container 500), improving temperature stability while ensuring the stability of the controlled 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, thus saving costs.

[0096] Furthermore, continue to participate Figures 2 to 4 The mounting slot 420 has a detection port 422, which can be used to configure the detection end of the temperature sensor.

[0097] For example, for the first fitting 51B, the mounting groove 420 is connected to the inside of the first preservation container 500B through the detection port 422. The detection end of the first temperature sensor is located at the detection port 422. Thus, the first temperature sensor can be installed on the outside of the first preservation container 500B and can detect the temperature inside the first preservation container 500B with high sensitivity.

[0098] For the second fitting 51, the mounting groove 420 is connected to the inside of the second preservation container 500 through the detection port 422. The detection end of the second temperature sensor is located at the detection port 422. Thus, the second temperature sensor can be installed on the outside of the second preservation container 500 and perform temperature detection on the inside of the second preservation container 500 with high sensitivity.

[0099] To further improve sensitivity and accuracy, the fitting includes a surround plate 423 surrounding the gas inlet 424 and the mounting groove 420.

[0100] For the first mating part 51B, its enclosure 423 protrudes from the outer surface of the first main body. This allows the cold air in the first compartment 101 where the first preservation container 500B is located (especially the cold air around the first preservation container 500B) to excessively contact the first temperature sensor, resulting in a lower temperature detection. This improves the accuracy of the temperature monitoring results, ensures the cooling effect at various locations inside the first preservation container 500B, and avoids preservation deterioration caused by inaccurate detection results.

[0101] For the second fitting 51, its enclosure 423 protrudes from the outer surface of the second main body. This allows the cold air in the second compartment 103 where the second preservation container 500 is located (especially the cold air around the second preservation container 500) to excessively contact the second temperature sensor, causing the temperature detection to be too low. This improves the accuracy of the temperature monitoring results, ensures the cooling effect at various locations inside the second preservation container 500, and avoids preservation deterioration caused by inaccurate detection results.

[0102] Additionally, on the connector, the enclosure 423 surrounds the open opening of the exposed mounting groove 420 and the gas inlet 424. Thus, the first temperature sensor can be installed from the outside of the first preservation container 500B through the open opening into the mounting groove 420 of the first connector 51B, specifically through a snap-fit ​​installation; similarly, the second temperature sensor can be installed from the outside of the second preservation container 500 through the open opening into the mounting groove 420 of the second connector 51, specifically through a snap-fit ​​installation.

[0103] The refrigeration appliance 100 also includes seals for closing the openings, for example, including 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 the seals, both the first and second 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.

[0104] Further, the fresh-keeping gases introduced into the first fresh-keeping container 500B and the second fresh-keeping container 500 can be set to be the same or different.

[0105] In one embodiment, the controlled atmosphere unit 60 is used to consume oxygen in the air to form an oxygen-deficient fresh-keeping gas, and / or is used to generate oxygen to form an oxygen-rich fresh-keeping gas.

[0106] The fresh-keeping gas flowing in the first controlled atmosphere channel 70B can be an oxygen-deficient fresh-keeping gas, so that the fresh-keeping gas supplied to the first fresh-keeping container 500B is an oxygen-deficient fresh-keeping gas; or, the fresh-keeping gas flowing in the first controlled atmosphere channel 70B can be an oxygen-rich fresh-keeping gas, so that the fresh-keeping gas supplied to the first fresh-keeping container 500B is an oxygen-rich fresh-keeping gas.

[0107] Similarly, the fresh-keeping gas flowing in the second controlled atmosphere channel 70 can be an oxygen-deficient fresh-keeping gas, so that the fresh-keeping gas supplied to the second fresh-keeping container 500 is an oxygen-deficient fresh-keeping gas; or, the fresh-keeping gas flowing in the second controlled atmosphere channel 70 can be an oxygen-rich fresh-keeping gas, so that the fresh-keeping gas supplied to the second fresh-keeping container 500 is an oxygen-rich fresh-keeping gas.

[0108] See Figure 3 , in a preferred embodiment, the fresh-keeping gas flowing in one of the first controlled atmosphere channel 70B and the second controlled atmosphere channel 70 is an oxygen-rich fresh-keeping gas, and the fresh-keeping gas flowing in the other is an oxygen-deficient fresh-keeping gas. Thus, the fresh-keeping gas supplied to one of the first fresh-keeping container 500B and the second fresh-keeping container 500 is an oxygen-rich fresh-keeping gas, and the fresh-keeping gas supplied to the other is an oxygen-deficient fresh-keeping gas.

[0109] It can be understood that the oxygen-deficient fresh-keeping gas refers to a fresh-keeping gas in which the volume percentage of oxygen contained is less than the volume percentage of oxygen in the air; the oxygen-rich fresh-keeping gas refers to a fresh-keeping gas in which the volume percentage of oxygen contained is higher than the volume percentage of oxygen in the air.

[0110] The controlled atmosphere unit 60 can specifically form the fresh-keeping gas by means of air physical separation, photocatalyst, chemical reaction, electrochemical reaction, etc. For example, the controlled atmosphere unit 60 can be set as an electrolytic controlled atmosphere unit that forms a fresh-keeping atmosphere through an electrochemical reaction.

[0111] See Figures 5 to 6 , 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 electrode of the power supply, and the cathode 62 is controllably connected to the negative electrode of the power supply.

[0112] In this way, under the control of the controller of the refrigeration appliance 100, the positive pole of the power supply is connected to the anode 61, and the negative pole of the power supply is connected to the cathode 62. That is, the power supply supplies power to the controlled atmosphere unit 60 to enable the controller to control the operation of the controlled atmosphere unit 60. Under the control of the controller, the connection between the positive pole of the power supply and the anode 61 is cut off, and the connection between the negative pole of the power supply and the cathode 62 is cut off. That is, the power supply stops supplying power to the controlled atmosphere unit 60 to enable the controller to control the controlled atmosphere unit 60 to stop operating. [[ID=…]]

[0113] Further, the controlled atmosphere unit 60 further includes an inner cavity that can at least hold electrolyte. [[ID=…]]

[0114] The first side of the cathode 62 is exposed to the inner cavity, and the second side is exposed to the external air of the controlled atmosphere unit 60. [[ID=…]]

[0115] When the controlled atmosphere unit 60 is operating, that is, when it is powered on, the cathode 62 is used to consume oxygen in the external air of the controlled atmosphere unit 60 through an electrochemical reaction. Specifically, oxygen undergoes a reduction reaction at the cathode 62, and the reaction formula is O2 + 2H2O + 4e - → 4OH - , so that the oxygen-deficient fresh-keeping gas can be formed outside the controlled atmosphere unit 60. [[ID=…]]

[0116] One or both sides of the anode 61 are exposed to the inner cavity. The anode 61 is used to generate oxygen in the inner cavity through an electrochemical reaction to form an oxygen-rich fresh-keeping gas. Specifically, OH - in the electrolyte can undergo an oxidation reaction at the anode 61 and generate oxygen. The reaction formula is 4OH - → O2 + 2H2O + 4e - , and the generated oxygen is collected to form the oxygen-rich fresh-keeping gas. [[ID=…]]

[0117] Refer Figure 3 , any one (or both) of the second controlled atmosphere channel 70 and the first controlled atmosphere channel 70B can be directly or indirectly connected to the oxygen outlet 63 of the controlled atmosphere unit 60 to supply the oxygen-rich fresh-keeping gas to any one (or both) of the corresponding second fresh-keeping container 500 and the first fresh-keeping container 500B; or, any one (or both) of the second controlled atmosphere channel 70 and the first controlled atmosphere channel 70B can supply the oxygen-deficient fresh-keeping gas outside the controlled atmosphere unit 60 to any one (or both) of the corresponding second fresh-keeping container 500 and the first fresh-keeping container 500B. [[ID=…]]

[0118] In one embodiment, the first end of the first modified atmosphere channel 70B is connected to the interior of the first preservation container 500B (e.g., connected to the gas inlet 424B of the second preservation container 500), and the second end is also connected to the interior of the first preservation container 500B (e.g., connected to the gas outlet 46B of the first preservation container 500B). The second side of the cathode 62 is exposed in the first modified atmosphere channel 70B. Thus, the gas in the first preservation container 500B first flows from the gas outlet 46B through a section of the first 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 flows through another section of the first modified atmosphere channel 70B back to the interior of the second preservation container 500 from the gas inlet 424B. This cycle continues until the second preservation container 500 achieves an oxygen-deficient environment that meets the target oxygen concentration.

[0119] The composition of the electrolyte used in the modified atmosphere unit 60, and the specific structure / material of the cathode 62 and anode 61 are common knowledge in the field of electrolysis technology and will not be elaborated further.

[0120] In addition, the modified atmosphere unit 60 also includes an electrolysis box 600, which has at least one window.

[0121] The cathode 62 is sealed and covered by the opening and is fixedly connected to the electrolytic box 600. The first side of the cathode 62 faces the inside of the electrolytic box 600 so as to contact the electrolyte inside the electrolytic box 600. The second side of the cathode 62 is exposed outside the modified atmosphere unit 60 from the opening so as to contact the gas outside the modified atmosphere unit 60.

[0122] 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.

[0123] Furthermore, in the refrigeration appliance of the present invention, the first compartment 101 and the second compartment 103 are cooled by air cooling. Currently, in other variations, direct cooling may also be used.

[0124] Specifically, the enclosure 10 is also equipped with a refrigeration chamber and a cold air duct.

[0125] The refrigeration chamber is equipped with the refrigeration unit. As mentioned above, when the refrigeration system is started, the refrigeration unit can exchange heat with the air in the refrigeration chamber, so that the air in the refrigeration chamber becomes cold air.

[0126] In one embodiment, the refrigeration compartment may be located behind the first compartment 101, but is not limited thereto. For example, if the first compartment 101 is a refrigerator compartment, the refrigeration compartment may also be located behind the freezer compartment.

[0127] The cold air duct connects the refrigeration chamber and the first compartment 101, allowing cold air from the refrigeration chamber to enter the first compartment 101, thereby cooling the first compartment 101. Furthermore, for the sealed first preservation container 500B in the first compartment 101, the cold air in the first compartment 101 flows to the outside of the first preservation container 500B and exchanges heat with the first body of the first preservation container 500B, thereby cooling the first preservation container 500B.

[0128] 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 in 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 of the second preservation container 500, thereby cooling the second preservation container 500.

[0129] Specifically, 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.

[0130] Next, see Figures 7 to 9 The specific structure and related matching structures of the first preservation container 500B are described in detail below.

[0131] The first compartment 101 is enclosed by the inner liner 12. The first main body of the first preservation container 500B includes a preservation tube 30B assembled in the inner liner 12 and a door panel 50B that seals and closes the preservation tube 30B. The first connecting piece 51B is fixedly installed on the preservation tube 30B.

[0132] The food storage container 30B is equipped with a drawer 41B that is always open, and the door panel 50B and the drawer 41B are fixedly installed.

[0133] The cooling air duct includes a first cooling channel 130B, which connects the refrigeration chamber and the first compartment 101. The first cooling channel 130B has an air inlet 131B exposed in the first compartment 101. The cold air from the refrigeration chamber can flow through the air inlet 131B into the first compartment 101 and outside the first preservation container 500B, specifically outside the preservation cylinder 30B.

[0134] Preferably, a guide air duct 461B is provided on the outside of the first preservation container 500B, which can be located on the outside of the preservation cylinder 30B; and the guide air duct 461B corresponds to the air inlet 131B 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 first preservation container 500B, thereby cooling the preservation environment inside the first preservation container 500B.

[0135] In one embodiment, the first connector 51B is disposed outside the air duct 461B. That is, the first temperature sensor is installed on the outside of the first preservation container 500B and is located outside the air duct 461B. In this way, most or even all of the cold air on the outer surface of the first preservation container 500B will not flow through the first temperature sensor.

[0136] Thus, by setting a guide air duct 461B outside the first preservation container 500B, cold air can flow along the outer surface of the first preservation container 500B, thereby achieving rapid cooling of the first preservation container 500B. This also ensures uniform cooling and avoids localized high temperatures inside the first preservation container 500B. Furthermore, a first temperature sensor is placed outside the first preservation container 500B to detect the internal temperature. The first temperature sensor is located outside the guide air duct 461B, ensuring that the cold air does not directly contact the first temperature sensor. Additionally, the first temperature sensor is not located inside the surface area of ​​the first preservation container 500B through which the cold air flows. This significantly reduces temperature detection deviations (e.g., underestimation) caused by direct cold air blowing, thereby improving the accuracy of temperature monitoring results, ensuring the cooling effect at all locations inside the first preservation container 500B, and preventing preservation degradation caused by localized high temperatures.

[0137] The specific structure of the airflow guide duct 461B can be implemented in various ways, such as a traditional cylindrical airflow duct structure. Preferably, as shown in the figure, the outer surface of the first preservation container 500B is provided with several guide ribs, which together form at least a portion of the airflow guide duct 461B. Thus, by providing guide ribs on the outside of the preservation container, cold air can flow along the outer surface of the preservation container, achieving rapid cooling of the preservation container while maintaining a simple structure and convenient installation.

[0138] In one embodiment, the plurality of guide ribs are disposed on the outer surface of the first main body, specifically 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.

[0139] In the attached diagram, the air inlet 131B is located on the air duct cover 13 and is preferably higher than the top wall of the food preservation container 30B.

[0140] 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; a 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.

[0141] 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.

[0142] 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.

[0143] The airflow duct 461B includes an expansion section 461Ba near the air inlet 131B and a section of equal width that is relatively far from the air inlet 131B, that is, the expansion section 461Ba is arranged at the rear relative to the equal width section.

[0144] 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.

[0145] Specifically, the first guide rib 4631B includes a first inclined section 4631Ba and a first straight section 4631Bb.

[0146] The first straight segment 4631Bb is located near the left edge of the food storage container 30B and extends in the front-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-back direction.

[0147] The second guide rib 4632B includes a second inclined section 4632Ba and a second straight section 4632Bb.

[0148] The second straight segment 4632Bb is located near the right edge of the food storage container 30B and extends in the front-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 illustrated as a multi-segment structure with an inclination angle different from that in the front-back direction.

[0149] The equal-width segment is formed between the first straight segment 4631Bb and the second straight segment 4632Bb.

[0150] The expansion segment 461Ba is formed between the second inclined segment 4632Ba and the second inclined segment 4632Ba.

[0151] 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.

[0152] More preferably, the refrigeration appliance further includes a shielding plate 15, which covers the first preservation container 500B, and the air inlet 131B is located below the shielding plate 15. In this way, on the one hand, the first preservation container 500B can be prevented from being exposed and affecting the appearance. On the other hand, and more importantly, the cold air flowing out of the air inlet 131B can be restricted to below the shielding plate 15, thereby further ensuring that the cold air can stay near the preservation cylinder 30B without excessive dissipation, thus improving the refrigeration effect of the first preservation container 500.

[0153] 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 or to the left and right sides from the gap between the first preservation container 500B and the shielding plate 15.

[0154] 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.

[0155] 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; 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 in the airflow duct 461B can be diverted to the left and right sides of the first preservation container 500B through these notches, thereby further increasing the temperature uniformity within the first preservation container 500B.

[0156] The refrigeration appliance 100 may also be equipped with a first damper and a first fan, which may be located in the first cooling channel 130B between the refrigeration chamber and the air inlet.

[0157] The first damper can open and close the first cooling channel 130B, and the first fan can be used to drive the cold air in the refrigeration chamber to flow along the first cooling channel 130B to the first compartment 101.

[0158] Preferably, the first fan can operate at different speeds to adjust the airflow of the cold air.

[0159] Additionally, the refrigeration appliance 100 may also include a first return 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 first compartment 101 and the refrigeration chamber, so that the cold air in the first compartment 101 can return to the refrigeration chamber through the first return air duct.

[0160] In a preferred embodiment, the enclosure 423 of the first connector 51B protrudes beyond the outer surface of the first main body of the first preservation container 500B relative to the plurality of air guide ribs. That is, the protrusion height of the enclosure 423 to the outer surface of the preservation cylinder 30B is greater than the protrusion height of the plurality of air guide ribs to the outer surface of the preservation cylinder 30B.

[0161] As shown in the figure, when the plurality of air guide ribs and the first connecting piece 51B are located on the top wall of the food preservation cylinder 30B, the upper edge of the enclosure 423 is higher than the upper edge of the plurality of air guide ribs, and the enclosure 423 can almost contact the shielding plate 15, thereby blocking the cold air from contacting the first temperature sensor as much as possible.

[0162] Furthermore, the first main body of the first preservation container 500B is provided with a window 301B. Specifically, the window 301B is provided on the preservation cylinder 30B and connects the interior of the first preservation container 500B with the air duct 461B.

[0163] The window 301B is sealed and covered with an air-barrier and moisture-permeable membrane, which is configured to allow water vapor to pass through unidirectionally into the interior of the preservation container 30B. This allows water vapor inside the preservation container 30B to pass through the air-barrier and moisture-permeable membrane into the air duct 461B, thereby preventing excessive humidity and condensation inside the preservation container 30B. Simultaneously, the cool air in the air duct 461B can accelerate the airflow over the surface of the air-barrier and moisture-permeable membrane, further promoting the escape of water vapor from the preservation container 30B.

[0164] In one embodiment, the window 301B is more specifically located between the first straight section 4631Bb and the second straight section 4632Bb; of course, the present invention is not limited thereto, and the window 301 can also be specifically opened in other positions of the first preservation container 500B, such as the left or right wall of the preservation tube 30B.

[0165] 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 shall 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.

[0166] 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 occur through the gas-barrier and moisture-permeable membrane.

[0167] The first preservation container 500B is also provided with a grid plate; the air-barrier and moisture-permeable membrane is clamped and fixed by the grid plate and the preservation cylinder 30B.

[0168] 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.

[0169] Furthermore, the first preservation container 500B may be equipped with a first humidity sensor and / or a first gas concentration sensor.

[0170] The first humidity sensor is used to sense the humidity value S1 inside the first preservation container 500B.

[0171] The first gas concentration sensor is used to sense the target gas concentration P1, such as oxygen concentration, inside the first preservation container 500B.

[0172] The controller of the refrigeration appliance 100 is connected to the first gas concentration sensor, the first 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.

[0173] Next, see Figure 8 as well as Figures 10 to 14 The specific structure of the second preservation container 500 and its related components are described in detail below.

[0174] The refrigeration appliance 100 also has a food storage container 30 and a door panel 50.

[0175] The food preservation container 30 is assembled in the inner liner 12, which encloses a second compartment 103 with an open front, and the second food preservation container 500 is disposed in the second compartment 103.

[0176] The second main body of the second preservation container 500 is configured as a drawer 40 movably housed within the preservation tube 30. The drawer 40 includes a box body 41 and a cover plate 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 plate 42 is movably fitted at the access opening and is used to open and close the access opening.

[0177] The door panel 50 is movably disposed at the opening, is fixedly connected to the box body 41, and is used to open and close the second chamber 103.

[0178] Furthermore, the box 41 is pushed and pulled back and forth to be housed inside the food storage container 30.

[0179] 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.

[0180] 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.

[0181] When the box body 41 is housed inside the food storage container 30, the door panel 50 closes the opening of the food storage container 30, and the box body 41 is in the housed state. The four edges of the cover plate 42 are sealed and fitted to the upper edge of the box body 41. When the box body 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 box body 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.

[0182] When the box body 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 plate 42 from moving forward or backward with the box body 41.

[0183] 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.

[0184] When the box body 41 is in the receiving state, the roller is embedded in the groove 421; when the box body 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 body 41 and the cover plate 42.

[0185] 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.

[0186] The second mating part 51 is fixedly installed on the drawer 40, specifically on the cover plate 42. This facilitates the mating of the end of the second modified atmosphere channel 70. For example, if the gas inlet 424 is located on the box body 41, the connection between the second modified atmosphere channel 70 and the gas inlet 424 will be difficult due to the back-and-forth movement of the box body 41. However, in one embodiment of the present invention, the gas inlet 424 is located on the cover plate 42, which makes it very convenient to install and connect the second modified atmosphere channel 70.

[0187] For example, the second modified atmosphere channel 70 includes a pipe connector 33 fixedly installed on the preservation container 30. The pipe connector 33 may 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 gas inlet 424.

[0188] The second 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.

[0189] The cooling air duct also includes a second cooling channel 130, which connects the refrigeration chamber and the second compartment 103. The second cooling channel 130 has an air inlet 131 exposed in the second compartment 103. The cold air from the refrigeration chamber can flow through the air inlet 131 into the second compartment 103 and outside the second preservation container 500, specifically outside the drawer 40.

[0190] In the attached diagram, the second cooling channel 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 preservation cylinder 30, specifically located on the upper part of the rear wall of the preservation cylinder 30, which may be higher than the cover 42 of the drawer 40.

[0191] Corresponding to the position of the air inlet 131, the second cooling channel 130 also has an air inlet 132 opened on the air duct cover 13. The air inlet 132 is directly opposite and connected to the air inlet 131. In this way, the cold air in the second 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 and the air inlet 131 in sequence, and flows forward into the second compartment 103.

[0192] 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.

[0193] Preferably, a guide air duct 461 is provided on the outside of the second preservation container 500, which can be located on the outside of the drawer 40; and the guide air duct 461 corresponds to the air inlet 131 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, thereby cooling the preservation environment inside the second preservation container 500.

[0194] In one embodiment, the second connector 51 is disposed outside the air duct 461. That is, the second temperature sensor is installed on the outside of the second preservation container 500 and located outside the air duct 461. In this way, most or even all of the cold air on the outer surface of the second preservation container 500 will not flow through the second temperature sensor.

[0195] This allows cold air to flow along the outer surface of the second preservation container 500, thereby achieving rapid cooling of the second preservation container 500. It also ensures uniform cooling and avoids localized high temperatures inside the second preservation container 500. On this basis, a second temperature sensor is placed outside the second preservation container 500 to detect the internal temperature. The second temperature sensor is located outside the airflow duct 461, which prevents the cold air from directly contacting the second temperature sensor. Furthermore, the second temperature sensor is not located inside the surface area of ​​the second preservation container 500 through which the cold air flows. This greatly reduces the temperature detection deviation (e.g., underestimation) caused by direct cold air blowing, thereby improving the accuracy of temperature monitoring results, ensuring the cooling effect at all locations inside the second preservation container 500, and avoiding preservation degradation caused by localized high temperatures.

[0196] 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 preservation container, cold air can flow along its outer surface, achieving rapid cooling of the container while maintaining a simple structure and easy installation.

[0197] In one embodiment, the plurality of guide ribs are disposed on the outer surface of the second body, specifically on the outer surface of the drawer 40, 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 drawer 40.

[0198] The plurality of guide ribs include a first guide rib 4631 and a second guide rib 4632 disposed on the cover plate 42, the first guide rib 4631 and the second guide rib 4632 being disposed opposite each other on the left and right; a guide air duct 461 is formed between the first guide rib 4631 and the second guide rib 4632, the guide air duct 461 being 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 flowing forward.

[0199] 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, respectively, so that the cold air can flow from back to front, so as to flow through as much of the outer side of the cover plate 42 as possible, thereby improving the cooling effect inside the drawer 40.

[0200] 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.

[0201] The airflow duct 461 includes an expansion section 461a near the air inlet 131 and a section of equal width that is relatively far from the air inlet 131, that is, the expansion section 461a is arranged at the rear relative to the equal width section.

[0202] The width of this expansion segment 461a gradually increases from front to back, while the width of the equal-width segment remains constant from front to back.

[0203] Specifically, the first guide rib 4631 includes a second inclined section 4631a and a second straight section 4631b.

[0204] The second straight segment 4631b is located near the left edge of the cover plate 42 and extends in the front-back direction; the second 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.

[0205] The second guide rib 4632 includes a second inclined section 4632a and a second straight section 4632b.

[0206] The second straight segment 4632b is located near the right edge of the cover plate 42 and extends in the front-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 illustrated as a multi-segment structure with an inclination angle different from that in the front-back direction.

[0207] The equal-width segment is formed between the second straight segment 4631b and the second straight segment 4632b.

[0208] The expansion segment 461a is formed between the second inclined segment 4632a and the second inclined segment 4632a.

[0209] 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.

[0210] 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.

[0211] In a variation embodiment, at the equal-width section of the airflow duct 461, the first guide rib 4631 and the second guide rib 4632 can also be configured to extend intermittently. For example, several notches can be provided in the second straight section 4631b, making the second straight section 4631b extend discontinuously; several notches can be provided in the second straight section 4632b, making the second straight section 4632b extend discontinuously. In this way, a portion of the cold air in the airflow duct 461 can be diverted to the left and right sides of the second preservation container 500 from these notches, thereby further increasing the temperature uniformity within the second preservation container 500.

[0212] 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 drawer 40 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.

[0213] The refrigeration appliance 100 may also be equipped with a second damper and a second fan, which may be installed in the second cooling channel 130 between the refrigeration chamber and the air inlet.

[0214] The second damper can open and close the second cooling channel 130, and the second fan can be used to drive the cold air in the refrigeration chamber to flow along the second cooling channel 130 to the second compartment 103.

[0215] Preferably, the second fan can operate at different speeds to adjust the airflow of the cold air.

[0216] Additionally, the refrigeration appliance 100 may also include a second return 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 second compartment 103 and the refrigeration chamber, so that the cold air in the second compartment 103 can return to the refrigeration chamber through the second return air duct.

[0217] In a preferred embodiment, the enclosure 423 of the second fitting 51 protrudes from the outer surface of the second body of the second preservation container 500 relative to the plurality of air guide ribs; that is, the protrusion height of the enclosure 423 to the outer surface of the drawer 40 is greater than the protrusion height of the plurality of air guide ribs to the outer surface of the drawer 40.

[0218] As shown in the figure, when the plurality of air guide ribs and the second connecting piece 51 are located on the top wall of the drawer 40, the upper edge of the enclosure 423 is higher than the upper edge of the plurality of air guide ribs, and the enclosure 423 can almost contact the food storage container 30, thereby blocking the cold air from contacting the second temperature sensor as much as possible.

[0219] Furthermore, the second body of the second preservation container 500 is provided with a window, specifically the window is provided on the cover plate 42, and the window connects the interior of the second preservation container 500 and the air duct 461.

[0220] The permeable window is sealed with an air-barrier and moisture-permeable membrane, which is configured to allow water vapor to pass through the interior of the drawer 40 in one direction. This allows water vapor inside the drawer 40 to pass through the air-barrier and moisture-permeable membrane into the airflow duct 461, thus preventing excessive humidity and condensation inside the drawer 40. Simultaneously, the cool air in the airflow duct 461 accelerates the airflow on the surface of the air-barrier and moisture-permeable membrane, further promoting the escape of water vapor from the drawer 40.

[0221] In one embodiment, the window is more specifically located between the second straight section 4631b and the second straight section 4632b; of course, the present invention is not limited thereto, and the window may also be specifically opened in other locations of the second food preservation container 500, such as the left or right wall of the drawer 40.

[0222] Furthermore, as mentioned above, the gas-barrier and moisture-permeable membrane 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 variant embodiment, the gas-barrier and moisture-permeable membrane 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.

[0223] 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 drawer 40 cannot occur through the gas-barrier and moisture-permeable membrane.

[0224] In this application, the specific structure and material of the gas barrier and moisture-permeable membrane of the first preservation container 500B and the gas barrier and moisture-permeable membrane 43 of the drawer 40 may be the same or different, and will be implemented with the technology known in the art, which will not be described in detail.

[0225] 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.

[0226] Hooks are provided around the perimeter of 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.

[0227] To improve the cooling effect in the second compartment 103 and avoid the exchange of cold energy between the second compartment 103 and the first compartment 101, the refrigeration appliance 100 also includes an insulation element 31, which surrounds the outside of the preservation cylinder 30. This reduces the heat exchange between the cold air inside the preservation cylinder 30 and the external first compartment 101 where the preservation cylinder 30 is located, thereby maximizing the cooling efficiency and temperature stability inside the drawer 40.

[0228] 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.

[0229] 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 first 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.

[0230] 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.

[0231] Further, a second humidity sensor and / or a second gas concentration sensor may be provided inside the second fresh-keeping container 500.

[0232] Among them, the second humidity sensor is used to sense the humidity value S2 inside the second fresh-keeping container 500.

[0233] The second gas concentration sensor is used to sense the target gas concentration P2 inside the second fresh-keeping container 500, such as the oxygen concentration.

[0234] The controller of the refrigeration appliance 100 is connected to the second gas concentration sensor, the second temperature sensor, and the second humidity sensor, and is used to control the start and stop of the gas conditioning unit 60, the start and stop of the refrigerator, the opening and closing of the second air 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.

[0235] See Figure 15 , in an embodiment, the controller is configured to: control the start and stop of the refrigerator, the opening and closing of the first air damper, and the start and stop of the first fan according to the humidity value S1 and / or the internal temperature T1; and control the start and stop of the refrigerator, the opening and closing of the second air damper, and the start and stop of the second fan according to the humidity value S2 and / or the internal temperature T2.

[0236] Specifically, for the temperature and humidity of the first fresh-keeping container 500B, the controller is configured to:

[0237] When the humidity value S1 is greater than the first humidity threshold S11 and the internal temperature T1 is lower than the fresh-keeping temperature threshold T10, after the refrigerator stops running for a preset time, control the first air damper to open and the first fan to run 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 fresh-keeping temperature threshold T10, control the refrigerator to run, the first air damper to open, and the first fan to run until the humidity value S1 drops to the second humidity threshold S12.

[0238] That is, the controller can be used to implement the temperature and humidity control method of the first fresh-keeping container 500B of the refrigeration appliance 100, including:

[0239] S101, judge whether the humidity value S1 in the first fresh-keeping container 500B is greater than the first humidity threshold S11. If so, execute S102; if not, repeat S101;

[0240] S102, judge whether the internal temperature T1 of the first fresh-keeping container 500B is lower than the fresh-keeping temperature threshold T10. If so, execute S103; if not, execute S104;

[0241] S103, after the refrigerator stops running for a preset time, the residual cold of the refrigerator is blown into the first chamber 101 and outside the first preservation container 500B. Specifically, this can be achieved by controlling the first damper to open and the first fan to run, until the humidity value S1 drops to the second humidity threshold S12, and then returns to S101; wherein, the second humidity threshold S12 is lower than the first humidity threshold S11.

[0242] S104, control the operation of the refrigeration unit to blow the cold air from the refrigeration unit into the first chamber 101 and outside the first 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 return to S101.

[0243] In steps S103 and S104, "the first air door opens and the first fan runs" can enable cold air to flow out of the air inlet 131B to the outside of the first preservation container 500B. However, at this time, it is not agreed whether other air inlets of the first compartment 101 located above the shielding plate 15 will flow out cold air. That is, at this time, other air inlets of the first compartment 101 located above the shielding plate 15 may or may not flow out cold air. In other words, in steps S103 and S104, it is possible to control that only cold air enters the first compartment 101 through the air inlet 131B while other air inlets (especially other air inlets located above the shielding plate 15) do not enter cold air.

[0244] Specifically, for example, regarding the temperature and humidity of the second preservation container 500, the controller is configured as follows:

[0245] 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 refrigerator stops operating for a preset time, the second damper is controlled to open and the second fan is operated 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 refrigerator is controlled to operate, the second damper is opened and the second fan is operated until the humidity value S2 decreases to the second humidity threshold S22.

[0246] 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:

[0247] 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.

[0248] 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.

[0249] S103, after the refrigerator stops running for a preset time, the residual cold of 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, until the humidity value S2 drops to the second humidity threshold S22, and then returns to S101; wherein, the second humidity threshold S22 is lower than the first humidity threshold S21.

[0250] 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 damper to open and the second fan to run, until the humidity value S2 decreases to the second humidity threshold S22, and then return to S101.

[0251] Thus, the controller described in this invention controls the internal temperature and humidity of each preservation container, or rather, based on... Figure 15 The control method shown accelerates the airflow outside the food storage container by supplying cold air to the compartment where the container is located when the humidity is too high. This causes the water vapor inside the container to pass through the air-barrier and moisture-permeable membrane more quickly, thereby regulating the humidity. While accelerating the airflow, the internal temperature of the food storage container is monitored to introduce cold air at different temperatures (e.g., the residual cooling from the refrigerator or newly prepared cold air), thereby saving energy and avoiding drastic temperature fluctuations that are too low or too high.

[0252] Preferably, for the first preservation container 500B, the preservation temperature threshold T10 is between the start-up temperature threshold T1on and the shutdown temperature threshold T1off of the first 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 first preservation container 500B is performing normal low-temperature storage, respectively.

[0253] 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.

[0254] Parameter Figure 16 , in one embodiment, the controller is further configured to: control the start and stop of the controlled atmosphere unit 60, the start and stop of the cooler, the opening and closing of the first air damper, and the start and stop of the first blower according to the target gas concentration P1 and / or the internal temperature T1; and, control the start and stop of the controlled atmosphere unit 60, the start and stop of the cooler, the opening and closing of the second air damper, and the start and stop of the second blower according to the target gas concentration P2 and / or the internal temperature T2.

[0255] Specifically, for example, for the temperature and humidity of the first fresh-keeping container 500B, the controller is configured to:

[0256] When the target gas concentration P1 meets the concentration threshold range (for example, the oxygen concentration is lower than a certain value, which is less than the volume percentage of oxygen in the air, 21%), control the controlled atmosphere unit 60 to stop operating and control the start and stop of the cooler, the opening and closing of the first air damper, and the start and stop of the first blower according to the internal temperature T1; when the target gas concentration P1 does not meet the concentration threshold range, control the controlled atmosphere unit 60 to operate, and during the operation of the controlled atmosphere unit 60, when the internal temperature T1 exceeds the first temperature threshold T11, control the cooler to operate, the first air damper to open, and the first blower to operate, and during the operation of the controlled atmosphere unit 60, when the internal temperature T1 exceeds the second temperature threshold T12, control the cooler to operate, the first air damper to open, and the first blower to operate and control the controlled atmosphere unit 60 to stop operating.

[0257] Wherein, the second temperature threshold T12 is greater than the first temperature threshold T11.

[0258] That is, the controller can be used to implement the combined control method of the temperature and fresh-keeping gas of the first fresh-keeping container 500B of the refrigeration appliance 100, including:

[0259] S201, judge whether the target gas concentration P1 meets the concentration threshold range, if so, execute S202, if not, execute S204;

[0260] S202, judge whether the internal temperature T1 reaches the start-up temperature threshold T1on, if so, execute S203, if not, return to S201;

[0261] S203, control the cooler to start to blow the cold air at the cooler to the outside of the first fresh-keeping container 500B in the first compartment 101, which can be specifically achieved by controlling the first air damper to open and the first blower to operate 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;

[0262] 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.

[0263] S205, control the refrigerator to turn on so that the cold air from the refrigerator is blown into the first compartment 101 and outside the first preservation container 500B. Specifically, this can be achieved by controlling the first 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.

[0264] Where T12 > T11, and T12 > T1on > T11.

[0265] For example, regarding the temperature and humidity of the second preservation container 500, the controller is configured as follows:

[0266] 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 percentage in the air), the controlled atmosphere unit 60 stops operating and controls the start / stop of the refrigerator, the opening / 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 is operated, and during the operation of the controlled atmosphere unit 60, when the internal temperature T2 exceeds the first temperature threshold T21, the refrigerator is operated, the second damper is opened, and the second fan is operated, and during the operation of the controlled atmosphere unit 60, when the internal temperature T2 exceeds the second temperature threshold T22, the refrigerator is operated, the second damper is opened, and the second fan is operated, and the controlled atmosphere unit 60 stops operating.

[0267] 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:

[0268] S201, determine whether the target gas concentration P2 meets the concentration threshold range. If yes, execute S202; otherwise, execute S204.

[0269] S202, determine whether the internal temperature T2 has reached the power-on temperature threshold T2on. If yes, execute S203; otherwise, return to S201.

[0270] S203, 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 until the internal temperature T2 drops to the shutdown temperature threshold T2off, and then return to S201.

[0271] 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.

[0272] 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 air 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.

[0273] Where T22 > T21, and T22 > T2on > T21.

[0274] Thus, the controller described in this invention provides joint control of the temperature and preservative gas of each preservation container, or rather, based on... Figure 16 The control method shown, during the operation of the controlled atmosphere unit 60 to supply preservative gas into the preservation container, continuously monitors the internal temperature of the preservation container. 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 drastic temperature increases caused by blindly controlling controlled atmosphere preservation, which could degrade the storage environment. Furthermore, this invention integrates a temperature sensor mounting slot and a preservative gas inlet 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 drastic temperature increases and improving the preservation effect.

[0275] 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.

[0276] The detailed descriptions listed above are merely specific descriptions of feasible implementations of the present invention and are not intended to limit the scope of protection of the present invention. All equivalent implementations or modifications made without departing from the spirit of the present invention should be included within the scope of protection of the present invention.

Claims

1. A refrigeration appliance, characterized in that, include: The container is equipped with compartments; A preservation container is disposed in the 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 gas inlet communicating with the inside and outside of the preservation container. A modified atmosphere unit is located outside the preservation container and is used to generate a preservative gas; A modified atmosphere channel connects to the modified atmosphere unit, and one end is disposed at the gas inlet to connect to the interior of the preservation container. Preservation gas enters the interior of the preservation container through the modified atmosphere channel. A temperature sensor is fixedly installed in the mounting slot and is used to sense the internal temperature of the preservation container.

2. The refrigeration appliance according to claim 1, characterized in that, 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.

3. The refrigeration appliance according to claim 2, characterized in that, The fitting includes a surrounding plate that surrounds the gas inlet and the mounting groove and protrudes from the outer surface of the body.

4. The refrigeration appliance according to claim 3, characterized in that, The enclosure surrounds an opening that exposes the mounting groove and the gas inlet; The temperature sensor is installed from the outside of the preservation container into the mounting slot via the opening; The refrigeration appliance also has a seal that closes the opening.

5. The refrigeration appliance according to claim 1, characterized in that, The end of the controlled atmosphere channel is configured as a pipe connector, which is plugged into the gas interface.

6. The refrigeration appliance according to claim 1, characterized in that, The enclosure is also equipped with a refrigeration compartment, and a refrigeration unit is installed inside the refrigeration compartment; The refrigeration appliance includes a cooling channel that connects the refrigeration chamber and the compartment, allowing cold air from the refrigeration chamber to flow into the compartment and outside the preservation container.

7. The refrigeration appliance according to claim 6, characterized in that, The cooling aisle has an air inlet exposed in the compartment, through which cold air from the cooling aisle enters the compartment; 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.

8. The refrigeration appliance according to claim 7, characterized in that, The connecting component is located outside the airflow duct.

9. The refrigeration appliance according to claim 7, characterized in that, 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.

10. The refrigeration appliance according to claim 7, characterized in that, The main body 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 further includes a damper and a fan disposed between the refrigeration chamber and the air inlet; the refrigeration appliance includes: A humidity sensor is installed inside the food preservation container to sense the humidity value inside the food preservation container; A controller, connected to the humidity sensor and the temperature sensor, is used to control the start and stop of the cooler, the opening and closing of the damper, and the start and stop of the fan based on the humidity value and / or the internal temperature.

12. The refrigeration appliance according to claim 11, characterized in that, The controller is configured to, when the humidity value is greater than a 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 operating for a preset time, until the humidity value drops to a 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.

13. The refrigeration appliance according to claim 6, characterized in that, The refrigeration appliance further includes a damper and a fan disposed between the refrigeration chamber and the air inlet; the refrigeration appliance further includes: A gas concentration sensor is disposed inside the preservation container to detect the concentration of a target gas inside the preservation container; A controller, connected to the gas concentration sensor and the temperature sensor, 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 damper and the start and stop of the fan according to the target gas concentration and / or the internal temperature.

14. The refrigeration appliance according to claim 13, characterized in that, 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 / 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 a 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 a 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. Wherein, 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.

15. The refrigeration appliance according to claim 1, characterized in that, 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 the compartment with an open front, and the door panel is movably disposed at the open front and used to open and close the compartment; The main body is configured as a drawer movably housed within the food storage container. The drawer includes a box body with an upper opening for retrieving items and a cover plate for opening and closing the opening for retrieving items. The box body and the door plate are fixedly connected.

16. The refrigeration appliance according to claim 15, characterized in that, The connector is fixedly installed on the cover plate, and the end of the modified atmosphere channel is fixedly set on the preservation cylinder and inserted into the gas inlet from the top and bottom.

17. The refrigeration appliance according to claim 1, characterized in that, The enclosure includes an inner liner that surrounds the compartment; The main body includes a preservation cylinder and a door panel for sealing and closing the preservation cylinder, and the connecting piece is fixedly installed on the preservation cylinder.

18. The refrigeration appliance according to claim 1, 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 formed preservation gas oxygen-rich.

19. A control method for a refrigeration appliance according to any one of claims 1 to 18, 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.

20. A control method for a refrigeration appliance according to any one of claims 1 to 18, characterized in that, include: 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. 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. S203, control the refrigerator to turn on so that the cold air from the refrigerator is blown into the compartment and outside the preservation container until the internal temperature drops to the shutdown temperature threshold, and return to S201; 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. S205, control the refrigerator to turn on so as to blow the cold air from the refrigerator 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. Wherein, 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.

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