Refrigeration appliance

Abstract

The utility model provides a refrigeration appliance. The refrigeration appliance comprises a box body provided with a chamber and a refrigeration cabin, and a refrigerator is installed in the refrigeration cabin; the fresh-keeping container is arranged in the compartment; the flow guide air duct is arranged on the outer side of the fresh-keeping container; the cold supply channel is communicated with the refrigeration cabin and the compartment and is provided with an air inlet, and cold air of the refrigeration cabin flows into the compartment through the air inlet and flows along the flow guide air duct outside the fresh-keeping container; and the temperature sensor is arranged on the outer side of the fresh-keeping container and used for sensing the internal temperature of the fresh-keeping container, and the temperature sensor is located outside the flow guide air duct. Therefore, the temperature detection deviation, such as low detection result, of the temperature sensor caused by direct blowing of cold air can be greatly reduced, the accuracy of the temperature monitoring result is further improved, and the refrigeration effect at each position in the fresh-keeping container is ensured.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, specifically to a refrigeration appliance. Background Technology

[0002] Currently, with the widespread application of frost-free refrigerators, they are increasingly favored by consumers. The cooling principle of a frost-free refrigerator is to utilize circulating air for cooling. When the warmer air flows through the built-in cooler, heat exchange occurs directly between the two, lowering the air temperature. The cooled air is then blown into the refrigerator, thus reducing its temperature. However, improving the cooling efficiency of frost-free refrigerators has become a key focus of their research and development.

[0003] In order to control the cooling effect, refrigerators need to be equipped with temperature sensors to monitor the temperature of the target storage space. The setting of the temperature sensor directly affects the control result of the cooling effect, and thus affects the storage effect. Utility Model Content

[0004] In view of the above-mentioned technical problems, the purpose of this utility model is to provide a refrigeration appliance.

[0005] To achieve the above objectives, one embodiment provides a refrigeration appliance. The refrigeration appliance includes:

[0006] The enclosure is provided with a compartment and a refrigeration chamber, and the refrigeration chamber is equipped with a refrigeration unit;

[0007] A food preservation container, which is disposed in the compartment;

[0008] An air duct is provided on the outside of the preservation container;

[0009] The cooling channel connecting the refrigeration chamber and the compartment has an air inlet. The cold air from the refrigeration chamber flows into the compartment through the air inlet and flows along the air guide duct outside the preservation container.

[0010] A temperature sensor is disposed on the outside of the preservation container and is used to sense the internal temperature of the preservation container. The temperature sensor is located outside the air duct.

[0011] Preferably, the outer wall of the preservation container is provided with a mounting groove, and the mounting groove has a detection port that communicates with the interior of the preservation container;

[0012] The temperature sensor is fixedly installed in the mounting slot, and its detection end is located at the detection port.

[0013] Preferably, the preservation container has a gas inlet and a gas outlet, and the preservation container can introduce preservation gas into the container through the gas inlet and discharge preservation gas out through the gas outlet;

[0014] The line distance between the mounting groove and the gas inlet is smaller than the line distance between the mounting groove and the gas outlet.

[0015] Preferably, the preservation container has a gas inlet, through which preservation gas can be introduced into the preservation container;

[0016] The mounting slot and the gas inlet are arranged side by side adjacent to each other.

[0017] Preferably, the outer surface of the preservation container is provided with a plurality of guide ribs;

[0018] At least a portion of the airflow duct is formed between the plurality of airflow guide ribs.

[0019] Preferably, the preservation container also has a surrounding panel that surrounds the gas inlet and the temperature sensor and protrudes from the outer surface of the preservation container relative to the flow guide ribs.

[0020] Preferably, the refrigeration appliance further includes a modified atmosphere unit disposed outside the preservation container, the modified atmosphere unit being used to generate the preservation gas and supply the preservation gas to the interior of the preservation container via the gas inlet.

[0021] Preferably, the refrigeration appliance further includes a controlled atmosphere channel, which connects the controlled atmosphere unit and the interior of the preservation container to allow preservation gas to enter the interior of the preservation container.

[0022] Preferably, the controlled atmosphere unit includes an anode, a cathode, and an inner cavity capable of containing at least an electrolyte;

[0023] 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.

[0024] 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.

[0025] 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;

[0026] The preservation container includes a drawer movably housed within the preservation tube. The drawer includes a box body with a retrieval opening and a cover plate for opening and closing the retrieval opening. The box body and the door plate are fixedly connected.

[0027] The several guide ribs are disposed on the outer surface of the drawer.

[0028] Preferably, a second airflow duct is formed between the drawer and the door panel, and the cold air flows into the second airflow duct after passing through the plurality of airflow guides.

[0029] Preferably, one of the cover plate and the box body is provided with protruding posts on the left and right sides, and the other is provided with a limit hook;

[0030] The protruding post is inserted into the limiting hook to restrict the cover plate from moving back and forth with the box body. When the box body is pulled forward from the preservation tube, the cover plate is suspended inside the preservation tube with the cooperation of the protruding post and the limiting hook.

[0031] The gas inlet is located on the cover plate, and the modified atmosphere channel includes a pipe connector fixedly installed on the preservation cylinder. One end of the pipe connector is exposed on the outside of the preservation cylinder, and the other end is inserted into the gas inlet vertically.

[0032] Preferably, the enclosure includes an inner liner that surrounds the compartment;

[0033] The preservation container includes a preservation cylinder assembled in the inner liner and a door panel that seals and closes the preservation cylinder, and a plurality of guide ribs are disposed on the outer surface of the preservation cylinder.

[0034] Preferably, the preservation container is further provided with a transparent window, the transparent window connecting the interior of the preservation container and the compartment, and the transparent window is exposed in the air guide duct;

[0035] 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.

[0036] Preferably, the refrigeration appliance also includes an oxygen concentration sensor;

[0037] The oxygen concentration sensor is installed inside the preservation container to detect the oxygen concentration inside the preservation container.

[0038] Preferably, the refrigeration appliance further includes a controller;

[0039] The controller is used to control the operation of the controlled atmosphere unit according to the oxygen concentration or the internal temperature, and to control the operation of the refrigerator according to the internal temperature.

[0040] Compared with the prior art, the beneficial effects of one embodiment of this utility model are as follows: by setting a guide air duct outside the food preservation container, cold air can flow along the outer surface of the food preservation container, thereby achieving rapid cooling of the food preservation container. It can also ensure uniform cooling and avoid local high temperatures inside the food preservation container. On this basis, a temperature sensor is set outside the food preservation container to detect the internal temperature of the food preservation container. The temperature sensor is located outside the guide air duct, so on the one hand, the cold air will not directly contact the temperature sensor, and on the other hand, the temperature sensor is not within the area of ​​the food preservation container through which the cold air flows. This can greatly reduce the temperature detection deviation (e.g., underestimation) caused by the direct blowing of cold air, thereby improving the accuracy of temperature monitoring results and ensuring the cooling effect at all locations inside the food preservation container. Attached Figure Description

[0041] Figure 1 This is a schematic diagram of the structure of a refrigeration appliance according to an embodiment of the present invention;

[0042] Figure 2 This is a schematic diagram of a partial structure of a refrigeration appliance according to an embodiment of the present invention;

[0043] Figure 3 yes Figure 2 A partial sectional view of the EE section line;

[0044] Figure 4 This is a schematic diagram of a partial structure of a refrigeration appliance according to an embodiment of the present invention, which is different from... Figure 2 At least the shielding panel was omitted;

[0045] Figure 5 This is an exploded view of a portion of the structure of a refrigeration appliance according to an embodiment of the present invention;

[0046] Figure 6 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.

[0047] Figure 7 yes Figure 2 A partial cross-sectional view of section line AA in the middle;

[0048] Figure 8 yes Figure 2 A partial sectional view of the BB section line;

[0049] Figure 9 yes Figure 2 A partial cross-sectional view of the CC section line;

[0050] Figure 10 This is a schematic diagram of the drawer structure according to an embodiment of the present invention;

[0051] Figure 11 is a schematic structural view of an air-conditioning unit according to an embodiment of the present utility model;

[0052] Figure 12 is along Figure 11 the sectional view of the D-D section line in

[0053] Figure 13 is a schematic block diagram of the fluid connection of the air-conditioning unit and two fresh-keeping containers of a refrigerating appliance according to an embodiment of the present utility model. Detailed implementation manners

[0054] The present application will be described in detail below in conjunction with the specific implementation manners shown in the drawings. However, these implementation manners do not limit the present application, and any structural, method, or functional transformation made by those of ordinary skill in the art according to these implementation manners is included within the protection scope of the present application.

[0055] In each of the drawings of the present application, for the convenience of illustration, the dimensions of some structures or parts 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.

[0056] Spatial relative position terms used herein, such as "above", "upper", "below", "lower", etc., are for the purpose of facilitating description of the relationship between one unit or feature and another unit or feature as shown in the 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 drawings. For example, if the device in the drawing is flipped, the unit described as being "below" or "beneath" other units or features will be located "above" other units or features. Therefore, the exemplary term "lower" 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.

[0057] Refer Figure 1 , an embodiment of the present utility model provides a refrigerating appliance 100.

[0058] In the illustration, the refrigerating appliance 100 can be specifically set as a refrigerator, which can be a household refrigerator or can be used as a commercial refrigerator.

[0059] First, the basic structure of the refrigerating appliance 100 of the present utility model will be introduced below. Specifically, the refrigerating appliance 100 includes a box body 10, a door body 20, and a refrigeration system.

[0060] The housing 10 includes a shell 11, an inner liner 12, and an insulation layer. The shell 11 forms part of the exterior of the refrigeration appliance 100. In the embodiment shown in the drawings, the shell 11 is generally a box-like structure with a back panel, top panel, bottom panel, left side panel, and right side panel. The inner liner 12 is fitted inside the shell 11 and spaced apart from the shell 11 to create a space between the shell 11 and the inner liner 12. The insulation layer fills this space; specifically, the insulation layer may include insulation board and foam material.

[0061] The inner liner 12 forms a compartment 101, which may be a storage temperature setting, specifically a freezer, a refrigerator, or a variable temperature compartment, preferably a refrigerator.

[0062] The number of doors 20 is set to one or more, each door 20 being movably connected to the front side of the enclosure 10 and used to open and close the compartment 101. For example, when the door 20 opens the compartment 101, the user can take or put items into the compartment 101; when the door 20 closes the compartment 101, the compartment 101 is essentially closed, the user cannot take or put items in, and even the low-temperature gas inside the compartment 101 cannot enter or exit the compartment 101 through the seam between the door 20 and the enclosure 10, thereby achieving low-temperature storage.

[0063] The refrigeration system includes a cooler for providing cooling capacity to the refrigerated appliance 100 in order to maintain a low-temperature storage environment in the compartment 101.

[0064] 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 room 101.

[0065] In this utility model, the housing 10 is also provided with a refrigeration chamber and a cold air duct.

[0066] 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.

[0067] In an alternative embodiment, the refrigeration chamber may be located in compartment 101 or in other locations besides compartment 101.

[0068] The cold air duct connects the refrigeration chamber and the compartment 101, thereby allowing cold air to circulate between the refrigeration chamber and the compartment 101, thus providing cold air to the compartment 101.

[0069] Specifically, for example, the cold air duct may include a supply air duct and a return air duct. The supply air duct connects the refrigeration chamber and the compartment 101, so that cold air flows from the refrigeration chamber to the compartment 101 along the supply air duct; the return air duct connects the refrigeration chamber and the compartment 101, so that cold air flows from the compartment 101 back to the refrigeration chamber along the return air duct.

[0070] Of course, with the goal of meeting the cooling needs of compartment 101, there are many feasible ways to connect the cold air duct, the cooling chamber, and compartment 101. These feasible ways have been disclosed in the art and will not be elaborated in this application.

[0071] Optionally, refer to Figures 2 to 6 The housing 10 includes an air duct cover 13, which is assembled to the rear wall of the inner liner 12. Part or all of the refrigeration chamber and / or the cold air duct is formed between the air duct cover 13 and the rear wall of the inner liner 12.

[0072] In this invention, the refrigeration appliance 100 includes a sealed food preservation container 500B, a cooling channel 130B, and a temperature sensor.

[0073] The preservation container 500B is installed in the compartment 101, and the outside of it is provided with a guide air duct 461B.

[0074] The cooling channel 130B forms part of the aforementioned cold air duct, specifically part of the air supply duct, and connects the refrigeration chamber and the compartment 101. The cooling channel 130B has an air inlet 131B, through which the cold air from the refrigeration chamber can flow into the compartment 101 and outside the preservation container 500B. The air inlet 131B corresponds to the guide air duct 461B, so that the cold air flowing out of the air inlet 131B can flow along the guide air duct 461B on the outer surface of the preservation container 500B, thereby cooling the preservation environment inside the preservation container 500B.

[0075] The temperature sensor is installed on the outside of the preservation container 500B and is located outside the air duct 461B. In other words, most or even all of the cold air on the outer surface of the preservation container 500B will not flow through the temperature sensor.

[0076] Thus, by setting a guide air duct 461B on the outside of the food preservation container 500B, cold air can flow along the outer surface of the food preservation container 500B, thereby achieving rapid cooling of the food preservation container 500B. It can also ensure uniform cooling and avoid local high temperatures inside the food preservation container 500B. On this basis, a temperature sensor is placed outside the food preservation container 500B to detect the internal temperature of the food preservation container 500B. The temperature sensor is located outside the guide air duct 461B, so on the one hand, the cold air will not directly contact the temperature sensor, and on the other hand, the temperature sensor is not within the area of ​​the food preservation container 500B through which the cold air flows. This can greatly reduce the temperature detection deviation (e.g., underestimation) caused by the direct blowing of cold air, thereby improving the accuracy of temperature monitoring results, ensuring the cooling effect at all locations inside the food preservation container 500B, and avoiding food preservation deterioration caused by local high temperatures.

[0077] 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 food 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 food preservation container, cold air can flow along the outer surface of the container, achieving rapid cooling of the container while maintaining a simple structure and convenient installation.

[0078] In one embodiment, the preservation container 500B includes a preservation cylinder 30B assembled in the inner liner 12 and a door panel 50B that seals and closes the preservation cylinder 30B. The plurality of guide ribs are disposed 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.

[0079] Specifically, the air inlet 131B is located on the air duct cover 13 and is higher than the top wall of the food storage container 30B.

[0080] 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.

[0081] 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.

[0082] 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.

[0083] 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.

[0084] 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.

[0085] Specifically, the first guide rib 4631B includes a first inclined section 4631Ba and a first straight section 4631Bb.

[0086] 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.

[0087] The second guide rib 4632B includes a second inclined section 4632Ba and a second straight section 4632Bb.

[0088] 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.

[0089] The equal-width segment is formed between the first straight segment 4631Bb and the second straight segment 4632Bb.

[0090] The expansion segment 461Ba is formed between the second inclined segment 4632Ba and the second inclined segment 4632Ba.

[0091] 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.

[0092] More preferably, the refrigeration appliance further includes a shielding plate 15, which covers the upper part of the preservation cylinder 30B, and the air inlet 131B is located below the shielding plate 15. In this way, on the one hand, the preservation cylinder 30B can be prevented from being exposed and affecting the appearance, and on the other hand, the key point is that the cold air flowing out of the air inlet 131B 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, and improving the refrigeration effect of the preservation container 500.

[0093] In one embodiment, as shown, an opening is formed in front of the air duct 461B, allowing cold air to flow forward from the gap between the preservation container 500B and the shielding plate 15.

[0094] 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.

[0095] 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 preservation container 500B through these notches, thereby further increasing the temperature uniformity within the preservation container 500B.

[0096] In addition, the plurality of guide ribs also include a plurality of third guide ribs 4633B disposed between the first guide rib 4631B and the second guide rib 4632B; these third guide ribs 4633B divide the expansion section 461Ba into at least two sub-ducts, the at least two sub-ducts being arranged side by side.

[0097] The refrigeration appliance 100 may also be equipped with a cooling fan, which may be installed in the refrigeration compartment and / or the cooling channel 130B. The cooling fan may be used to drive the cold air in the refrigeration compartment to flow along the cooling channel 130B to the compartment 101.

[0098] Preferably, the cooling fan can operate at different speeds to adjust the airflow of the cooling air.

[0099] Additionally, the refrigeration appliance 100 may also include a return cooling duct, which is at least partially located between the duct cover 13 and the rear wall of the inner liner 12, and connects the compartment 101 and the refrigeration chamber, so that cold air in the compartment 101 can return to the refrigeration chamber through the return cooling duct.

[0100] The recirculation channel forms part of the cold air duct mentioned above, specifically part of the return air duct.

[0101] More preferably, the reference Figure 4 The temperature sensor is specifically disposed on the outside of the food preservation container 30B; the outer wall of the food preservation container 30B is provided with a mounting groove 420B, which has a detection port communicating with the interior of the food preservation container 30B. The temperature sensor is fixedly installed in the mounting groove 420B, and its detection end is located at the detection port; thus, the temperature sensor can be installed on the outside of the food preservation container 30B and can detect the temperature inside the food preservation container 30B, with high sensitivity and avoiding damage to the temperature sensor caused by condensation.

[0102] Furthermore, the food preservation container 500B has a gas inlet 424B and a gas outlet 46B. The food preservation container 500B can introduce preservation gas into the interior through the gas inlet 424B and can discharge the preservation gas outward through the gas outlet 46B.

[0103] In a preferred embodiment, the line distance between the mounting groove 420B and the gas inlet 424B is smaller than the line distance between the mounting groove 420B and the gas outlet 46B. This line distance is also known as the straight-line distance. In other words, the mounting groove 420B is set closer to the gas inlet 424B. This makes the gas inlet 33B close to the temperature sensor, allowing the temperature sensor to detect temperature fluctuations caused by the preservative gas introduced by the gas inlet 33B in a timely manner. This information is then used by the controller of the refrigeration appliance to control the cold air, thereby improving the temperature stability within the preservation container 500B.

[0104] In the embodiment shown in the accompanying drawings, the temperature sensor is located at the rear left corner of the top wall of the preservation cylinder 30B, while the gas inlet 33B is located at the upper left corner of the rear wall of the preservation cylinder 30B, thereby making the temperature sensor close to the gas inlet 33B.

[0105] Furthermore, the preservation container 500B has a window 301B. Specifically, the window 301B is opened on the preservation tube 30B and connects the interior of the preservation container 500B with the air duct 461B.

[0106] 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.

[0107] 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 to this, and the window 301 can also be specifically opened in other positions of the preservation container 500B, such as the left or right wall of the preservation tube 30B.

[0108] Furthermore, as mentioned above, the gas-barrier and moisture-permeable membrane is configured to allow water vapor to pass through the interior of the preservation container 30B in one direction, so as to avoid excessive humidity inside the preservation container 30B, for example, the humidity inside the preservation container 30B does not exceed 85%; while in a modified embodiment, the gas-barrier and moisture-permeable membrane is configured to allow water vapor to enter the interior of the preservation container 30B in one direction, so that the humidity inside the preservation container 30B is maintained above a certain lower limit value, thus meeting the different usage requirements of different humidity inside the preservation container 30B.

[0109] 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.

[0110] The 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.

[0111] 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.

[0112] Furthermore, a humidity sensor can be installed inside the drawer 40 to sense the humidity value inside the drawer 40; the controller of the refrigeration appliance 100 controls the operation of the cooling fan according to the humidity value, including controlling the start, stop and speed of the cooling fan.

[0113] Next, in addition to the preservation container 500B described above, the refrigeration appliance 100 also has another preservation container that is different from the preservation container 500B. For easy distinction, the other preservation container will be referred to as the second preservation container below.

[0114] Specifically, the refrigeration appliance 100 shown in the figure also includes a preservation cylinder 30, a sealed second preservation container, a cooling channel 130, and a second temperature sensor.

[0115] The preservation container 30 encloses a compartment 103 with an open front, and the second preservation container is disposed in the compartment 103.

[0116] The cooling channel 130 is located on the outside of the second preservation container and forms part of the cold air duct mentioned above, specifically part of the air supply duct, which connects the refrigeration chamber and the compartment 103. The cooling channel 130 has an air inlet 131, through which the cold air from the refrigeration chamber can flow into the compartment 101 and outside the second preservation container. The air inlet 131 corresponds to the guide air duct 461, so that the cold air flowing out of the air inlet 131 can flow along the guide air duct 461 on the outer surface of the second preservation container, thereby cooling the preservation environment inside the drawer 40.

[0117] The second temperature sensor is installed on the outside of the second preservation container, specifically outside the air duct 461. In other words, most or even all of the cold air on the outer surface of the second preservation container will not flow through the second temperature sensor.

[0118] Thus, by setting a guide air duct 461 on the outside of the second preservation container, cold air can flow along the outer surface of the second preservation container, thereby achieving rapid cooling of the second preservation container. It can also ensure uniform cooling and avoid local high temperatures inside the second preservation container. On this basis, a second temperature sensor is set outside the second preservation container to detect the internal temperature of the second preservation container. The second temperature sensor is located outside the guide air duct 461, so on the one hand, the cold air will not directly contact the second temperature sensor, and on the other hand, the second temperature sensor is not within the area of ​​the second preservation container through which the cold air flows. This can greatly reduce the temperature detection deviation (e.g., lower than expected) caused by the direct blowing of cold air, thereby improving the accuracy of temperature monitoring results, ensuring the cooling effect at all locations inside the second preservation container, and avoiding preservation deterioration caused by local high temperatures.

[0119] The specific structure of the airflow guide duct 461 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 second preservation container is provided with several guide ribs, and the guide ribs form at least a portion of the airflow guide duct 461. In this way, by providing guide ribs on the outside of the second preservation container, cold air can flow along the outer surface of the second preservation container, which not only achieves rapid cooling of the second preservation container, but also has a simple structure and is easy to install.

[0120] In one embodiment, the second fresh-keeping container includes a drawer 40 movably received in the fresh-keeping cylinder 30.

[0121] The drawer 40 includes a box body 41 and a cover plate 42, wherein: the box body 41 has an access opening at the upper part, that is, the user can access the interior 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.

[0122] See Figures 7 to 10 , a plurality of flow guiding ribs are arranged on the outer surface of the drawer 40 such that the cold air flowing out of the air inlet 131 can flow along the flow guiding air duct 461 on the outer surface of the drawer 40.

[0123] The cold air supply channel 130 is at least partially located between the air duct cover plate 13 and the rear wall of the inner liner 12. Its air inlet 131 is opened on the fresh-keeping cylinder 30, specifically at the upper part of the rear wall of the fresh-keeping cylinder 30, and can be higher than the cover plate 42 of the drawer 40.

[0124] Thus, corresponding to the position of the air inlet 131, the cold air supply channel 130 further has an air inlet interface 132 opened on the air duct cover plate 13. The air inlet interface 132 is directly opposite and docked with the air inlet 131 front and back. Thus, the cold air in the cold air supply channel 130 flows between the air duct cover plate 13 and the rear wall of the inner liner 12, and then sequentially passes through the air inlet interface 132 and the air inlet 131, and flows forward into the compartment 103.

[0125] The refrigeration appliance 100 can also be provided with a second cold air supply fan. The second cold air supply fan can be arranged in the refrigeration chamber and / or the cold air supply channel 130. The second cold air supply fan can be used to drive the cold air in the refrigeration chamber to flow along the cold air supply channel 130 into the compartment 103.

[0126] Preferably, the cold air supply fan can operate at different speeds to adjust the air volume of the cold air.

[0127] In addition, the refrigeration appliance 100 can also include a second cold air return duct. The second cold air return duct is at least partially located between the air duct cover plate 13 and the rear wall of the inner liner 12. It communicates the compartment 103 and the refrigeration chamber to allow the cold air in the compartment 103 to return to the refrigeration chamber through the second cold air return duct.

[0128] The second cold air return duct forms a part of the cold air duct described above, specifically, it forms a part of the return air duct.

[0129] In one embodiment, the second cold air return duct includes an air return opening 133 opened on the fresh-keeping cylinder 30. The cold air in the fresh-keeping cylinder 30 enters the second cold air return duct through the air return opening 133 and finally returns to the refrigeration chamber.

[0130] The location of the return air vent 133 can be chosen in several ways. For example, the return air vent 133 can be located on the lower part of the rear wall of the food storage container 30, specifically below the bottom wall of the drawer 40's body 41; or, for another example, the return air vent 133 can be located in the middle of the bottom wall of the food storage container 30. However, the location of the return air vent 133 is not limited to these.

[0131] Furthermore, the box body 41 is accommodated in the food storage container 30 by pushing and pulling. For example, when the box body 41 located inside the food storage container 30 is pulled forward, the box body 41 moves forward through the opening and leaves the food storage container 30 for the user to take out and put in items; while when the box body 41 located outside the food storage container 30 is pushed backward, the box body 41 moves backward through the opening and enters the food storage container 30.

[0132] 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.

[0133] 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.

[0134] 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.

[0135] 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.

[0136] Furthermore, on each of the left and right sides of the container 41, two protruding posts 411 are arranged in a front-to-back pattern. On each of the left and right sides of the food storage container 30, two limiting hooks 32 are provided that are adapted to the two protruding posts 411. The limiting hook 32 that is in front is higher than the limiting hook 32 that is behind. In this way, when the container 41 is in the pulled-out state, each protruding post 411 is engaged in the corresponding limiting hook 32, and the cover plate 42 is suspended and supported on the food storage container 30 in an inclined state with the front end higher and the rear end lower. With this arrangement, when the container 41 is pushed into the food storage container 30, it can enter under the cover plate 42 more smoothly, avoiding interference and jamming.

[0137] 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.

[0138] 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.

[0139] 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.

[0140] In one embodiment, the refrigeration appliance 100 also includes a door panel 50.

[0141] The door panel 50 is fixedly connected to the box body 41. It can move synchronously with the box body 41 and can seal the opening of the food storage container 30. In other words, the food storage container 30 and the door panel 50 together enclose a roughly sealed compartment 103.

[0142] To improve the cooling effect in compartment 103, the refrigeration appliance 100 also includes an insulation component 31, which surrounds the outside of the food storage container 30. This reduces the heat exchange between the cold air inside the food storage container 30 and the external compartment 101 where the food storage container 30 is located, thereby maximizing the cooling efficiency and temperature stability inside the drawer 40.

[0143] 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.

[0144] The plurality of guide ribs corresponding to the position of the air inlet 131 include a first guide rib 4631 and a second guide rib 4632 disposed on the cover plate 42, the first guide rib 4631 and the second guide rib 4632 being disposed opposite each other on the left and right; the 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 forward.

[0145] The first guide rib 4631 and the second guide rib 4632 extend from the rear edge of the cover plate 42 to the front edge of the cover plate 42, thereby allowing cold air to flow from back to front, so as to flow through as much of the outside of the drawer 40 as possible, thereby improving the cooling effect inside the drawer 40.

[0146] The airflow duct 461 includes an expansion section 461a near the air inlet 131, which has a gradually increasing width from front to back; the airflow duct 461 also includes a second equal-width section relatively far from the air inlet 131, which has a relatively constant width from front to back.

[0147] That is, the expansion section 461a is arranged at the rear relative to the second equal-width section.

[0148] Specifically, the first guide rib 4631 includes a first inclined section 4631a and a first straight section 4631b.

[0149] The first straight segment 4631b is located near the left edge of the cover plate 42 and extends in the front-back direction; the first inclined segment 4631a extends in an inclined manner from back to front and from right to left, and in the figure, it is illustrated as a multi-segment structure with an inclination angle different from that in the front-back direction.

[0150] The second guide rib 4632 includes a second inclined section 4632a and a second straight section 4632b.

[0151] The second straight segment 4632b is located near the right edge of the preservation container 30 and extends in the front-back direction; the second inclined segment 4632a extends in an inclined shape 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.

[0152] The second equal-width segment is formed between the first straight segment 4631b and the second straight segment 4632b.

[0153] The expansion segment 461a is formed between the second inclined segment 4632a and the second inclined segment 4632a.

[0154] 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.

[0155] Furthermore, a second airflow duct 462 is provided between the drawer 40 and the door panel 50. In this way, the cold air entering the refrigerator 30 first flows forward under the guidance of the airflow duct 461, then flows downward in the second airflow duct 462, and finally flows backward through the bottom wall of the drawer 40 to reach the return air vent 133. This can increase the flow path of the cold air in the refrigerator 30, thereby providing as much cooling as possible to the inside of the drawer 40.

[0156] In the embodiment shown in the accompanying drawings, both the first guide rib 4631 and the second guide rib 4632 extend continuously. In a variation embodiment, the first guide rib 4631 and the second guide rib 4632 can also be configured to extend intermittently. For example, several notches are provided in the first straight section 4631b, making the first straight section 4631b extend discontinuously; several notches are provided in the second straight section 4632b, making the second straight section 4632b extend discontinuously. In this way, a portion of the cold air within the airflow duct 461 can be diverted to the left and right sides of the drawer 40 through these notches, thereby further increasing the temperature uniformity within the drawer 40.

[0157] Next, drawer 40 has a window that connects the interior of drawer 40 to the airflow duct 461. The window is sealed with a breathable membrane 43, which is configured to allow water vapor to escape unidirectionally from the interior of drawer 40. This allows water vapor inside drawer 40 to pass through the breathable membrane 43 into the airflow duct 461, preventing excessive humidity and condensation inside drawer 40. Simultaneously, the cool air in the airflow duct 461 accelerates the airflow on the surface of the breathable membrane 43, further promoting the escape of water vapor from drawer 40.

[0158] In one embodiment, the window is specifically opened on the cover plate 42, more specifically, located between the first straight section 4631b and the second straight section 4632b; of course, the present invention is not limited to this, and the window may also be specifically opened in other positions of the drawer 40, such as the front wall of the box body 41.

[0159] Furthermore, as mentioned above, the gas-barrier and moisture-permeable membrane 43 is configured to allow water vapor to pass through the interior of the drawer 40 in one direction, so as to avoid excessive humidity inside the drawer 40, for example, the humidity inside the drawer 40 does not exceed 85%; while in a modified embodiment, the gas-barrier and moisture-permeable membrane 43 is configured to allow water vapor to enter the interior of the drawer 40 in one direction, so that the humidity inside the drawer 40 is maintained above a certain lower limit value, thus meeting the different usage requirements of different humidity inside the drawer 40.

[0160] At the same time, the gas-barrier and moisture-permeable membrane 43 can block gas from passing through, for example, gas exchange between the inside and outside of the drawer 40 cannot be carried out through the gas-barrier and moisture-permeable membrane 43.

[0161] 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.

[0162] 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.

[0163] Furthermore, a humidity sensor can be installed inside the drawer 40 to sense the humidity value inside the drawer 40; the controller of the refrigeration appliance 100 controls the operation of the cooling fan according to the humidity value, including controlling the start, stop and speed of the cooling fan.

[0164] For example, when the humidity sensor detects that the humidity value reaches or exceeds the humidity threshold A1, the controller controls the cooling fan to start from the stopped state to supply cool air into the drawer 40, thereby using the cool air to accelerate the moisture permeability of the air-barrier and moisture-permeable membrane 43.

[0165] For example, when the humidity sensor detects that the humidity value is within a first humidity range A2~A3 (A2 ≥ A1), the controller controls the cooling fan to operate at a first speed. When the humidity sensor detects that the humidity value is within a second humidity range A4~A5 (A4 ≥ A3), the controller controls the cooling fan to operate at a second speed, which is greater than the first speed. That is, when the humidity value exceeds a humidity threshold, the higher the humidity value, the higher the speed of the cooling fan, thereby maintaining the stability of the humidity value.

[0166] In this application, the specific structure and material of the gas barrier and moisture-permeable membrane of the food preservation container 500B and the gas barrier and moisture-permeable membrane 43 of the drawer 40 may be the same or different, and will be implemented with the technology known in the art, without further details.

[0167] In one embodiment, the refrigeration appliance 100 also has a partition frame 14, which is fixedly assembled on the inner liner 12 to separate an installation cavity in the compartment 101 enclosed by the inner liner 12. The preservation cylinder 30, the heat preservation component 31, and the preservation cylinder 30B are all fixedly assembled in the installation cavity, specifically the preservation cylinder 30 and the preservation cylinder 30B are arranged side by side.

[0168] 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.

[0169] Next, the second temperature sensor is specifically installed on the drawer 40. For example, the second temperature sensor is located on the cover plate 42 and outside the airflow duct 461, that is, outside the plurality of airflow ribs.

[0170] Of course, the second temperature sensor is not limited to being located on the cover plate 42, but can also be moved to other locations outside the airflow duct 461.

[0171] More preferably, the outer wall of the drawer 40 is provided with a mounting groove 420, and the mounting groove 420 has a detection port 422 that communicates with the interior of the drawer 40. The second temperature sensor is fixedly installed in the mounting groove 420, and its detection end is located at the detection port 422; thus, the second temperature sensor can be installed on the outside of the drawer 40 and perform temperature detection on the inside of the drawer 40 with high sensitivity.

[0172] To further improve sensitivity and accuracy, a surrounding plate 423 is also provided on the outer wall of drawer 40. The surrounding plate 423 surrounds the mounting groove 420 and extends from the outer wall of drawer 40 to the inner wall of the food storage container 30. In this way, even if a small amount of cold air flows out from the air duct 46, for example, from the second air guide rib 4632 to the right towards the second temperature sensor, this portion of cold air will not come into excessive contact with the second temperature sensor due to the obstruction of the surrounding plate 423, thereby avoiding underestimation of the temperature due to direct cold air blowing.

[0173] The enclosure 423 protrudes beyond the outer surface of the second preservation container compared to the plurality of guide ribs. That is, the protrusion height of the enclosure 423 to the outer surface of the second preservation container is greater than the protrusion height of the plurality of guide ribs to the outer surface of the second preservation container.

[0174] The upper edge of the enclosure 423 is higher than the upper edge of the plurality of guide ribs, and it can almost contact the inner wall of the preservation cylinder 30, or have a slight gap with the inner wall of the preservation cylinder 30, so as to block the cold air from contacting the second temperature sensor as much as possible.

[0175] Furthermore, in one embodiment of this utility model, the reference... Figure 6 and Figure 9 The drawer 40 also has a gas inlet 424 connecting the interior and exterior of the drawer 40, through which preservative gas can be introduced into the drawer 40; a surrounding panel 423 also surrounds the gas inlet 424. Thus, the high-temperature preservative gas enters the interior of the drawer 40 at the gas inlet 424, making the area near the gas inlet 424 the hottest location inside the drawer 40. The second temperature sensor is positioned near the gas inlet 424, allowing for timely detection of the high temperature inside the drawer 40, facilitating temperature control in conjunction with the introduction of the preservative gas.

[0176] Preferably, the reference Figures 11 to 13 The refrigeration appliance 100 also includes a controlled atmosphere unit 60, a first controlled atmosphere channel 70, and a second controlled atmosphere channel 70B.

[0177] The modified atmosphere unit 60 is configured to generate a preservative gas, and its location is preferably outside the preservation cylinder 30 and outside the preservation container 500B. For example, the modified atmosphere unit 60 can be located inside the inner liner 12 (e.g., in the refrigerator compartment 101), or between the inner liner 12 and the outer shell 11, or on the outside of the outer shell 11, or in the mechanical chamber; of course, these variations in location are all feasible within the technical spirit of this invention.

[0178] The first modified atmosphere channel 70 connects the interior of the modified atmosphere unit 60 and the drawer 40, so that the preservative gas generated by the modified atmosphere unit 60 can enter the interior of the drawer 40.

[0179] As mentioned above, the second temperature sensor is located on the cover plate 42, and correspondingly, the gas inlet 424 is located on the cover plate 42. This facilitates the setting of the modified atmosphere channel 70. For example, if the gas inlet 424 is located on the box body 41, the connection between the 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 this utility model, the gas inlet 424 is located on the cover plate 42, which makes it very convenient to install and connect the modified atmosphere channel 70.

[0180] Specifically, the modified atmosphere channel 70 includes a pipe connector 33 fixedly installed on the preservation container 30, for example, it can be integrally installed with the preservation container 30. The first end of the pipe connector 33 is exposed on the outer wall of the preservation container 30, and the second end is inserted and matched with the gas inlet 424.

[0181] The 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.

[0182] The second modified atmosphere channel 70B connects the interior of the modified atmosphere unit 60 and the preservation cylinder 30B, so that the preservation gas generated by the modified atmosphere unit 60 can enter the interior of the preservation cylinder 30B.

[0183] Specifically, the modified atmosphere channel 70B is connected to the interior of the preservation container 30B via the gas inlet 424B. Thus, combined with the location of the temperature sensor, the higher-temperature preservation gas enters the interior of the preservation container 30B at the gas inlet 424B, making the area near the gas inlet 424B the hottest location inside the preservation container 30B. The temperature sensor is located near the gas inlet 424B, thereby detecting the high temperature inside the preservation container 30B in a timely manner, which is beneficial for controlling the temperature in conjunction with the entry of the preservation gas.

[0184] The fresh-keeping gases flowing in the first controlled atmosphere channel 70 and the second controlled atmosphere channel 70B can be set to be the same or different. For example, the controlled atmosphere unit 60 is used to consume oxygen in the air to form an oxygen-deficient fresh-keeping gas, and / or to generate oxygen to form an oxygen-rich fresh-keeping gas; the fresh-keeping gases flowing in the first controlled atmosphere channel 70 and the second controlled atmosphere channel 70B can both be oxygen-deficient fresh-keeping gases, or both be oxygen-rich fresh-keeping gases, or one is an oxygen-deficient fresh-keeping gas and the other is an oxygen-rich fresh-keeping gas.

[0185] 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.

[0186] The controlled atmosphere unit 60 can specifically form the fresh-keeping gas by means of air physical separation, photocatalyst, chemical reaction, electro-chemical 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 electro-chemical reaction.

[0187] See Figures 11 to 13 , 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.

[0188] In this way, when the controller controls the operation of the controlled atmosphere unit 60, under the control of the controller, the positive electrode of the power supply is connected to the anode 61, and the negative electrode of the power supply is connected to the cathode 62, that is, the power supply supplies power to the controlled atmosphere unit 60; when the controller controls the controlled atmosphere unit 60 to stop, under the control of the controller, the connection between the positive electrode of the power supply and the anode 61 is cut off, and the connection between the negative electrode 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.

[0189] Furthermore, the controlled atmosphere unit 60 further includes at least an inner cavity that can accommodate an electrolyte solution.

[0190] 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.

[0191] 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 electro-chemical reaction. Specifically, oxygen undergoes a reduction reaction at the cathode 62, and the reaction formula is O2 + 2H2O + 4e - →4OH - , thus, an oxygen-deficient fresh-keeping atmosphere can be formed outside the controlled atmosphere unit 60.

[0192] One or both sides of the anode 61 are exposed in the inner cavity. The anode 61 is used to generate oxygen in the inner cavity through an electrochemical reaction to create an oxygen-rich preservation atmosphere. Specifically, OH- in the electrolyte... - An oxidation reaction can occur at the anode 61, producing oxygen, with the reaction formula 4OH. - →O2 + 2H2O + 4e - The generated oxygen is collected to create an oxygen-rich preservation atmosphere.

[0193] Either or both of the first modified atmosphere channel 70 and the second modified atmosphere channel 70B can be directly or indirectly connected to the oxygen outlet 63 of the modified atmosphere unit 60 to supply an oxygen-rich preservation atmosphere to the corresponding second preservation container or preservation container 500B; or, either or both of the first modified atmosphere channel 70 and the second modified atmosphere channel 70B can supply an oxygen-deficient preservation atmosphere from outside the modified atmosphere unit 60 to the corresponding second preservation container or preservation container 500B.

[0194] In one embodiment, the first modified atmosphere channel 70 is connected to the oxygen outlet 63 of the modified atmosphere unit 60 and is used to receive the oxygen-enriched preservation atmosphere from the modified atmosphere unit 60 so as to realize the function of oxygen-enriched preservation through the drawer 40.

[0195] Meanwhile, one end of the second modified atmosphere channel 70B can be connected to the interior of the preservation cylinder 30B (for example, connected to the gas outlet 46B of the preservation cylinder 30B), and the other end can also be connected to the interior of the preservation cylinder 30B (for example, connected to the gas inlet 424B of the preservation cylinder 30B). The second side of the cathode 62 is exposed in the second modified atmosphere channel 70B. Thus, the gas in the preservation cylinder 30B first flows through a section of the second modified atmosphere channel 70B to the second side of the cathode 62. The oxygen in the gas is consumed by the electrochemical reaction that occurs in the cathode 62, forming an oxygen-deficient preservation atmosphere. The gas then returns to the interior of the preservation cylinder 30B through another section of the second modified atmosphere channel 70B. This cycle continues until the oxygen-deficient environment in the preservation cylinder 30B meets the target oxygen concentration.

[0196] 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.

[0197] In addition, the modified atmosphere unit 60 also includes an electrolysis box 600, which has at least one window.

[0198] 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.

[0199] 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.

[0200] Furthermore, the refrigeration appliance 100 also includes two oxygen concentration sensors, one of which is located inside the drawer 40 and the other is located inside the food storage container 30B, for detecting oxygen concentration and allowing the controller of the refrigeration appliance 100 to control the operation of the controlled atmosphere unit 60 based on the oxygen concentration.

[0201] Furthermore, the controller can also be configured to control the operation of the controlled atmosphere unit based on the internal temperature sensed by the temperature sensor or the second temperature sensor; and to control the operation of the refrigerator based on the internal temperature. Thus, on the one hand, controlling the operation of the refrigerator by the internal temperature, combined with the placement of the temperature sensor or the second temperature sensor outside the corresponding airflow path, ensures that the sensed temperature is not excessively low, thereby making the start-up and shutdown temperature points of the refrigerator more reasonable and effective, avoiding poor preservation caused by localized high temperatures; on the other hand, controlling the operation of the controlled atmosphere unit by the internal temperature, combined with the placement of the temperature sensor or the second temperature sensor, can more promptly prevent poor preservation caused by abnormally high temperatures in the preservative gas of the controlled atmosphere unit.

[0202] In summary, the beneficial effects of this embodiment of the present invention are as follows: by setting a guide air duct outside the food preservation container, cold air can flow along the outer surface of the food preservation container, thereby achieving rapid cooling of the food preservation container. Furthermore, it can ensure uniform cooling and prevent localized high temperatures inside the food preservation container. On this basis, a temperature sensor is placed outside the food preservation container to detect the internal temperature. Since the temperature sensor is located outside the guide air duct, the cold air will not directly contact the temperature sensor, and the temperature sensor is not within the area of ​​the food preservation container through which the cold air flows. This greatly reduces temperature detection deviations (e.g., underestimation) caused by direct cold air blowing, thereby improving the accuracy of temperature monitoring results and ensuring the cooling effect at all locations inside the food preservation container.

[0203] 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.

[0204] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this utility model and are not intended to limit the scope of protection of this utility model. All equivalent implementation methods or modifications made without departing from the spirit of this utility model should be included within the scope of protection of this utility model.

Claims

1. A refrigeration appliance, characterized in that, include: The enclosure is provided with a compartment and a refrigeration chamber, and the refrigeration chamber is equipped with a refrigeration unit; A food preservation container, which is disposed in the compartment; An air duct is provided on the outside of the preservation container; The cooling channel connecting the refrigeration chamber and the compartment has an air inlet. The cold air from the refrigeration chamber flows into the compartment through the air inlet and flows along the air guide duct outside the preservation container. A temperature sensor is disposed on the outside of the preservation container and is used to sense the internal temperature of the preservation container. The temperature sensor is located outside the air duct.

2. The refrigeration appliance according to claim 1, characterized in that, The outer wall of the preservation container is provided with an installation groove, and the installation groove has a detection port that communicates with the interior of the preservation container; The temperature sensor is fixedly installed in the mounting slot, and its detection end is located at the detection port.

3. The refrigeration appliance according to claim 2, characterized in that, The preservation container has a gas inlet and a gas outlet. The preservation container can introduce preservation gas into the container through the gas inlet and can discharge preservation gas out through the gas outlet. The line distance between the mounting groove and the gas inlet is smaller than the line distance between the mounting groove and the gas outlet.

4. The refrigeration appliance according to claim 2, characterized in that, The preservation container has a gas inlet, through which preservation gas can be introduced into the preservation container; The mounting slot and the gas inlet are arranged side by side adjacent to each other.

5. The refrigeration appliance according to claim 3 or 4, characterized in that, The outer surface of the preservation container is provided with several flow guide ribs; At least a portion of the airflow duct is formed between the plurality of airflow guide ribs.

6. The refrigeration appliance according to claim 5, characterized in that, The preservation container also has a surrounding panel that surrounds the gas inlet and the temperature sensor and protrudes from the outer surface of the preservation container relative to the flow guide ribs.

7. The refrigeration appliance according to claim 5, characterized in that, The refrigeration appliance also includes a modified atmosphere unit located outside the preservation container, the modified atmosphere unit being used to generate the preservation gas and supply the preservation gas to the interior of the preservation container via the gas inlet.

8. The refrigeration appliance according to claim 7, characterized in that, The refrigeration appliance also includes a controlled atmosphere channel, which connects the controlled atmosphere unit and the interior of the preservation container to allow preservation gas to enter the interior of the preservation container.

9. The refrigeration appliance according to claim 8, characterized in that, The controlled atmosphere unit 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.

10. The refrigeration appliance according to claim 8, 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 preservation container includes a drawer movably housed within the preservation tube. The drawer includes a box body with a retrieval opening and a cover plate for opening and closing the retrieval opening. The box body and the door plate are fixedly connected. The several guide ribs are disposed on the outer surface of the drawer.

11. The refrigeration appliance according to claim 10, characterized in that, A second airflow duct is provided between the drawer and the door panel, and the cold air flows into the second airflow duct after passing through the plurality of airflow guides.

12. The refrigeration appliance according to claim 10, characterized in that, One of the cover plate and the box body is provided with protruding posts on the left and right sides, and the other is provided with a limit hook; The protruding post is inserted into the limiting hook to restrict the cover plate from moving back and forth with the box body. When the box body is pulled forward from the preservation tube, the cover plate is suspended inside the preservation tube with the cooperation of the protruding post and the limiting hook. The gas inlet is located on the cover plate, and the modified atmosphere channel includes a pipe connector fixedly installed on the preservation cylinder. One end of the pipe connector is exposed on the outside of the preservation cylinder, and the other end is inserted into the gas inlet vertically.

13. The refrigeration appliance according to claim 8, characterized in that, The enclosure includes an inner liner that surrounds the compartment; The preservation container includes a preservation cylinder assembled in the inner liner and a door panel that seals and closes the preservation cylinder, and a plurality of guide ribs are disposed on the outer surface of the preservation cylinder.

14. The refrigeration appliance according to claim 7, characterized in that, The preservation container is also provided with a window, which connects the interior of the preservation container and the compartment, and the window is exposed in the air duct. The permeable window is covered with a gas-barrier and moisture-permeable membrane, which is configured to allow water vapor to enter or exit the interior of the preservation container in one direction.

15. The refrigeration appliance according to claim 14, characterized in that, The refrigeration appliance also has an oxygen concentration sensor; The oxygen concentration sensor is installed inside the preservation container to detect the oxygen concentration inside the preservation container.

16. The refrigeration appliance according to claim 15, characterized in that, The refrigeration appliance also has a controller; The controller is used to control the operation of the controlled atmosphere unit according to the oxygen concentration or the internal temperature, and to control the operation of the refrigerator according to the internal temperature.

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