Refrigeration appliance

Abstract

The invention provides a refrigeration appliance. The refrigerating appliance comprises a box body, a refrigerating chamber and a refrigerating chamber, wherein the box body is provided with a fresh-keeping chamber with an opening and a refrigerating cabin provided with a refrigerator; the drawer is movably contained in the fresh-keeping chamber and comprises a box body with an object taking opening and a cover plate for opening and closing the object taking opening; the door plate is connected with the box body, synchronously moves along with the box body and seals the opening of the fresh-keeping chamber; the cold supply channel is communicated with the refrigeration cabin and the fresh-keeping chamber, so that cold air in the refrigeration cabin flows into the fresh-keeping chamber and out of the drawer; the air conditioning unit is arranged outside the fresh-keeping chamber and forms a fresh-keeping atmosphere; and the controlled atmosphere channel is communicated with the controlled atmosphere unit and the interior of the drawer, so that a fresh-keeping atmosphere enters the drawer. Thus, fresh-keeping atmosphere is supplied into the drawer, cold air is supplied to the outside of the drawer, the temperature in the drawer and the fresh-keeping atmosphere are both considered, and the excellent food storage and fresh-keeping effect is achieved.

Description

Technical Field

[0001] This invention relates to the field of household appliance technology, and more specifically to a refrigeration appliance. 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 atmosphere with low oxygen content can be introduced into a closed space, for example, the oxygen content by volume is less than 21%; or an oxygen-rich preservative atmosphere can be introduced into a closed space, for example, the oxygen content by volume is greater than 21%.

[0005] Meanwhile, in refrigeration appliances, in addition to regulating the gas atmosphere, temperature control is also required. However, existing refrigeration appliances with modified atmosphere technology struggle to balance temperature control and modified atmosphere for preservation, often resulting in drastic fluctuations in the gas atmosphere for preservation due to temperature control issues. Summary of the Invention

[0006] The purpose of this invention is to provide a refrigeration appliance that not only has modified atmosphere preservation technology, but also solves the problem of drastic fluctuations in the preservation gas atmosphere caused by temperature control.

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

[0008] The container is equipped with an open fresh-keeping compartment and a refrigeration compartment with a refrigeration unit installed.

[0009] A drawer movably housed within the preservation compartment includes a box body with an access opening and a cover for opening and closing the access opening;

[0010] The door panel connected to the box body moves synchronously with the box body and closes the opening of the preservation compartment;

[0011] A cooling aisle connects the refrigeration compartment and the fresh-keeping compartment, allowing cold air from the refrigeration compartment to flow into the fresh-keeping compartment and out of the drawer;

[0012] A modified atmosphere unit is located outside the fresh food storage room and creates a fresh food storage atmosphere;

[0013] A modified atmosphere channel connects the modified atmosphere unit and the interior of the drawer to allow a preservative atmosphere to enter the interior of the drawer.

[0014] Preferably, the modified atmosphere unit is used to consume oxygen in the air to create an oxygen-deficient preservation atmosphere, and / or to generate oxygen to create an oxygen-rich preservation atmosphere.

[0015] The modified atmosphere channel connects the modified atmosphere unit and the interior of the drawer to allow either an oxygen-deficient or oxygen-enriched preservation atmosphere to enter the interior of the drawer.

[0016] Preferably, the modified atmosphere unit is configured as an electrolytic modified atmosphere unit that forms a preservative atmosphere through an electrochemical reaction, comprising an anode, a cathode, and an inner cavity capable of containing at least an electrolyte.

[0017] One side of the cathode is exposed in the inner cavity and the other side is exposed in the controlled atmosphere channel. The cathode is used to consume the oxygen in the controlled atmosphere channel through an electrochemical reaction to create an oxygen-deficient preservation atmosphere.

[0018] Alternatively, one or both sides of the anode are exposed in the cavity, and the anode is used to generate oxygen in the cavity through an electrochemical reaction to form an oxygen-rich preservation atmosphere, and the modified atmosphere channel supplies the oxygen-rich preservation atmosphere to the interior of the drawer.

[0019] Preferably, the preservation chamber is configured as a cylindrical structure;

[0020] The cooling channel has an air inlet located on the fresh-keeping compartment;

[0021] The refrigeration appliance also includes a guide air duct corresponding to the air inlet for the flow of cold air, the guide air duct being formed between the drawer and the crisper compartment and / or between the drawer and the door panel.

[0022] Preferably, the refrigeration appliance includes a temperature sensor, which is mounted on the drawer and located outside the airflow duct.

[0023] Preferably, the outer wall of the drawer is provided with a mounting groove and a surrounding panel around the mounting groove;

[0024] The mounting slot has a detection port that communicates with the interior of the drawer;

[0025] The temperature sensor is fixedly installed in the mounting groove, and its detection end is located at the detection port;

[0026] The panel extends from the outer wall of the drawer to the inner wall of the crisper compartment.

[0027] Preferably, the drawer also has a controlled atmosphere inlet communicating between the interior and exterior of the drawer, and the panel surrounds the controlled atmosphere inlet.

[0028] The controlled atmosphere channel connects to the interior of the drawer via the controlled atmosphere inlet.

[0029] Preferably, the controlled atmosphere inlet is located on the cover plate;

[0030] The modified atmosphere channel includes a pipe connector fixedly installed on the fresh-keeping chamber, one end of which is exposed on the outer wall of the fresh-keeping chamber, and the other end is inserted into the modified atmosphere inlet.

[0031] Preferably, the cover is movably installed on the preservation chamber;

[0032] When the box is pulled forward from the preservation chamber, the cover is suspended inside the preservation chamber.

[0033] Preferably, the outer wall of the drawer is provided with a plurality of guide ribs, which define at least a portion of the airflow duct.

[0034] Preferably, the cover plate has a ventilation window, which connects the inside of the drawer and the air duct.

[0035] The ventilation window is sealed and covered with an air-barrier and moisture-permeable membrane, which is configured to allow water vapor to enter or exit the interior of the drawer in one direction only.

[0036] Preferably, the cooling channel has an air inlet located on the fresh-keeping compartment, and the air inlet is located on the upper part of the rear wall of the fresh-keeping compartment opposite to the opening;

[0037] The plurality of guide ribs include a first guide rib and a second guide rib disposed on the cover plate, wherein the first guide rib and the second guide rib are disposed opposite each other on the left and right sides;

[0038] The airflow duct includes a first airflow duct formed between the first airflow rib and the second airflow rib, the first airflow duct being directly opposite the air inlet to guide cold air to flow forward along the cover plate.

[0039] Preferably, the first guide rib and the second guide rib extend from the rear edge of the cover plate to the front edge of the cover plate, respectively;

[0040] The airflow duct includes a rearward expansion section and a frontward equal-width section. The width of the expansion section gradually increases from front to back, while the width of the equal-width section remains constant from front to back.

[0041] Preferably, the airflow duct further includes a second airflow duct formed between the drawer and the door panel.

[0042] Preferably, the refrigeration appliance includes an oxygen concentration sensor;

[0043] The oxygen concentration sensor is located inside the drawer to detect the oxygen concentration inside the drawer.

[0044] Preferably, the box body includes an inner liner that encloses a compartment, and the fresh-keeping compartment is installed inside the compartment;

[0045] The refrigeration appliance includes an insulation component and an air duct cover. The insulation component surrounds the outside of the fresh-keeping compartment, and the air duct cover is assembled to the rear wall of the inner liner.

[0046] The cooling channel is at least partially located between the air duct cover and the rear wall of the inner liner, and includes an air inlet formed on the fresh-keeping compartment, through which cold air enters the fresh-keeping compartment.

[0047] Compared with the prior art, the beneficial effects of one embodiment of the present invention are as follows: by combining the configuration of the controlled atmosphere channel, the cooling channel, the fresh-keeping compartment, and the drawer, the present invention, on the one hand, supplies a fresh-keeping atmosphere to the inside of the drawer to achieve controlled atmosphere preservation of the storage environment inside the drawer; on the other hand, it supplies cold air to the outside of the drawer and the inside of the fresh-keeping compartment to achieve cold air cooling in the small space outside the drawer. While efficiently maintaining the low temperature environment inside the drawer, it avoids the large amount of cold air entering the drawer and causing the atmosphere inside the drawer to fluctuate drastically with the cooling demand. In this way, both the temperature inside the drawer and the fresh-keeping atmosphere are taken into account, thereby achieving excellent food storage and preservation effects. Attached Figure Description

[0048] Figure 1 This is a schematic diagram of the structure of a refrigeration appliance according to an embodiment of the present invention;

[0049] Figure 2 This is a schematic diagram of a partial structure of a refrigeration appliance according to an embodiment of the present invention;

[0050] Figure 3 yes Figure 2 A partial cross-sectional view of section line AA in the middle;

[0051] Figure 4 yes Figure 2 A partial sectional view of the BB section line;

[0052] Figure 5 yes Figure 2 A partial cross-sectional view of the CC section line;

[0053] Figure 6 It is a schematic diagram of the structure of the fresh-keeping chamber, heat-insulating member, etc. of a refrigeration appliance according to an embodiment of the present invention;

[0054] Figure 7 It is an exploded schematic diagram of the structure of the fresh-keeping chamber, heat-insulating member, drawer, etc. of a refrigeration appliance according to an embodiment of the present invention from a rear-side perspective;

[0055] Figure 8 It is an exploded schematic diagram of the structure of the fresh-keeping chamber, heat-insulating member, drawer, etc. of a refrigeration appliance according to an embodiment of the present invention from a front-side perspective;

[0056] Figure 9 It is a schematic diagram of the structure of a drawer according to an embodiment of the present invention;

[0057] Figure 10 It is a schematic diagram of the structure of a gas conditioning unit according to an embodiment of the present invention;

[0058] Figure 11 It is along Figure 10 The sectional view along the D-D section line in;

[0059] Figure 12 It is a schematic block diagram of the fluid connection of the gas conditioning unit of a refrigeration appliance, the oxygen-poor drawer, and the oxygen-rich drawer according to an embodiment of the present invention. Detailed embodiments

[0060] The present application will be described in detail below in conjunction with the specific embodiments shown in the 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 protection scope of the present application.

[0061] In each illustration 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.

[0062] Spatial relative position terms used herein, such as "above", "upper", "below", "lower", etc., are for the purpose of facilitating description to describe the relationship of one unit or feature relative to another unit or feature as shown in the drawings. The spatial relative position terms may be 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 figure 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 may be oriented in other ways (rotated 90 degrees or other orientations), and the spatially related descriptive terms used herein will be interpreted accordingly.

[0063] Refer Figure 1One embodiment of the present invention provides a refrigeration appliance 100.

[0064] In the illustration, the refrigeration appliance 100 can be specifically defined as a refrigerator, which can be a household refrigerator or a commercial refrigerator.

[0065] The basic structure of the refrigeration appliance 100 of the present invention will be described below. Specifically, the refrigeration appliance 100 includes a housing 10, a door 20, and a refrigeration system.

[0066] The housing 10 includes a shell 11, one or more inner liners 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 one or more inner liners 12 are fitted inside the shell 11 and spaced apart from the shell 11 to create a space between the shell 11 and the one or more inner liners 12. The insulation layer fills the space; specifically, the insulation layer may include insulation board and foam material.

[0067] The one or more inner liner 12 enclose a number of compartments, which may include a freezer compartment 102, a refrigerator compartment 101, a variable temperature compartment, etc., depending on the storage temperature setting value in the compartment.

[0068] The number of doors 20 is set to one or more, each door 20 being movably connected to the front side of the housing 10 and used to open and close each of the compartments. For example, when a compartment is opened by a door 20, the user can put or take items into the compartment; when a compartment is closed by a door 20, the compartment is essentially sealed, the user cannot put or take items into the compartment, and even the low-temperature gas inside the compartment cannot enter or exit the compartment through the seam between the door 20 and the housing 10, thereby achieving low-temperature storage.

[0069] 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 each of the compartments.

[0070] 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 realizes heat absorption and heat release based on phase change, and then exchanges heat with the air at the evaporator to produce the cold air required by the room.

[0071] In this invention, the housing 10 is also provided with a refrigeration chamber and a cold air duct.

[0072] 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.

[0073] The cold air duct connects the refrigeration chamber and some or all of the compartments, thereby allowing cold air to circulate between the refrigeration chamber and the compartments, thus providing cold air to the compartments to maintain the low temperature environment of the compartments.

[0074] 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, allowing cold air to flow from the refrigeration chamber to the compartment along the supply air duct; the return air duct connects the refrigeration chamber and the compartment, allowing cold air to flow from the compartment back to the refrigeration chamber along the return air duct.

[0075] Of course, with the goal of meeting the cooling needs of each compartment, there are many feasible ways to connect the cold air duct, the cooling chamber, and each compartment. These feasible ways have been disclosed in the art and will not be elaborated in this application.

[0076] Optionally, refer to Figure 2 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.

[0077] In an optional embodiment, the refrigeration compartment may be located in the freezer compartment 102, that is, the refrigeration compartment may be constructed at the rear of the freezer compartment 102; or, the refrigeration compartment may be located in the refrigerator compartment 101, that is, the refrigeration compartment may be constructed at the rear of the refrigerator compartment 101; or, when there are multiple refrigerators, one refrigeration compartment may be constructed at the rear of both the freezer compartment 102 and the refrigerator compartment 101.

[0078] Similarly, the cold air duct can be located at the rear of the freezer compartment 102 or at the rear of the refrigerator compartment 101. Alternatively, the cold air duct can be installed at the rear of both the freezer compartment 102 and the refrigerator compartment 101.

[0079] As a variation of the implementation, the refrigeration chamber and the cold air duct can also be moved to other locations outside the room, such as outside the housing 10 or inside the machine room of the housing 10. These can all be implemented using methods known in the art.

[0080] In this invention, the refrigeration appliance 100 has a modified atmosphere preservation function.

[0081] Specifically, refer to Figures 2 to 8 The container 10 is also equipped with an open-top fresh-keeping compartment 30.

[0082] In one specific embodiment, the freshness compartment 30 may be located in a compartment enclosed by the inner liner 12, such as in the refrigerator compartment 101, but is not limited thereto.

[0083] Refrigeration appliance 100 also includes drawer 40, door panel 50, and controlled atmosphere unit 60 (refer to the reference number). Figures 10-12 ), cooling channel 130 and controlled atmosphere channel 70.

[0084] Drawer 40 is movably housed within the preservation compartment 30, and includes a box body 41 and a lid 42.

[0085] The box body 41 has a retrieval opening, which means that the user can store and retrieve items inside the box body 41 through the retrieval opening; the cover plate 42 is movably fitted at the retrieval opening and is used to open and close the retrieval opening.

[0086] In one embodiment, the box body 41 is configured with a five-sided structure having a bottom wall, a left side wall, a right side wall, a front side wall, and a rear side wall. The retrieval opening is specifically formed on the top of the box body 41, and correspondingly, the cover plate 42 is movably disposed on the top of the box body 41. However, it can be understood that the shape of the box body 41, the position of the retrieval opening, and the position of the cover plate 42 are not limited to this.

[0087] Additionally, the box 41 is accommodated within the fresh-keeping compartment 30 by sliding back and forth. For example, when the box 41 located within the fresh-keeping compartment 30 is pulled forward, the box 41 moves forward through the opening and leaves the fresh-keeping compartment 30, allowing the user to retrieve or place items; while when the box 41 located outside the fresh-keeping compartment 30 is pushed backward, the box 41 moves backward through the opening and enters the fresh-keeping compartment 30.

[0088] The door panel 50 is connected to the box body 41 and can move synchronously with the box body 41. It can also close the opening of the fresh food compartment 30. In other words, the fresh food compartment 30 and the door panel 50 together enclose a roughly sealed fresh food compartment, which constitutes one of the compartments mentioned above.

[0089] The cooling supply channel 130 forms part of the aforementioned cold air duct, specifically part of the air supply duct, and connects the refrigeration compartment and the fresh-keeping compartment 30 to allow cold air from the refrigeration compartment to flow into the fresh-keeping compartment 30. Specifically, in this invention, through the cooling supply channel 130, cold air from the refrigeration compartment flows into the fresh-keeping compartment 30 and out of the drawer 40.

[0090] The modified atmosphere unit 60 is configured to create a preservation atmosphere and is located outside the preservation chamber 30. Specifically, the modified atmosphere unit 60 can create the preservation gas through methods such as physical air separation, photocatalysis, chemical reaction, or electrochemical reaction. For example, the modified atmosphere unit 60 can be configured as an electrolytic modified atmosphere unit that creates the preservation atmosphere through an electrochemical reaction.

[0091] The preservation atmosphere in this application refers to an atmosphere in which the types of gases contained or the volume percentage of gases differ from air.

[0092] Optionally, in one embodiment, the controlled atmosphere unit 60 may be disposed inside the inner liner 12 (e.g., in the refrigerator compartment 101), or between the inner liner 12 and the outer shell 11, or on the outside of the outer shell 11, or in the machine room; of course, these variations in location are all feasible within the spirit of the invention.

[0093] Preferably, the modified atmosphere unit 60 is arranged inside the inner liner 12 and side by side on the left or right side of the fresh food compartment 30, which facilitates the overall layout of the modified atmosphere unit 60 and the fresh food compartment 30.

[0094] The modified atmosphere channel 70 connects the interior of the modified atmosphere unit 60 and the drawer 40, so that the preservation atmosphere created by the modified atmosphere unit 60 can enter the interior of the drawer 40.

[0095] By combining the modified atmosphere channel 70, the cooling channel 130, the freshness compartment 30, and the drawer 40, this invention supplies a freshness-preserving atmosphere to the inside of the drawer 40 to achieve modified atmosphere preservation of the storage environment inside the drawer 40. On the other hand, it supplies cold air to the outside of the drawer 40 and the inside of the freshness compartment 30 to achieve cold air cooling in the small space outside the drawer 40. While efficiently maintaining the low temperature environment inside the drawer 40, it avoids a large amount of cold air entering the drawer 40 and causing the atmosphere inside the drawer 40 to fluctuate drastically with the cooling demand. In this way, it takes into account both the temperature inside the drawer 40 and the freshness-preserving atmosphere, thereby achieving excellent food storage and preservation effects.

[0096] In one embodiment, the preservation chamber 30 is configured as a cylindrical structure.

[0097] To improve the cooling effect inside the fresh food compartment 30, the refrigeration appliance 100 also includes an insulation element 31, which surrounds the outside of the fresh food compartment 30. This reduces the heat exchange between the cold air inside the fresh food compartment 30 and the compartment where the fresh food compartment 30 is located (e.g., the refrigerator compartment 101), thereby maximizing the cooling efficiency and temperature stability inside the drawer 40.

[0098] The insulation component 31 includes an upper insulation plate 31a, a left insulation plate 31b, a right insulation plate 31d, a rear insulation plate 31c, and a rear insulation plate 31e, located on the upper, left, right, rear, and lower sides of the preservation chamber 30, respectively. Preferably, the insulation component 31 can be integrally formed, or it can be separately formed and assembled together as shown in the figure.

[0099] 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.

[0100] In one embodiment, the refrigeration appliance 100 further includes a partition frame 14, which is fixedly assembled on the inner liner 12 to separate an installation cavity in the compartment (e.g., the refrigerator compartment 101) enclosed by the inner liner 12, and the freshness compartment 30 and the heat preservation component 31 are fixedly assembled in the installation cavity.

[0101] More specifically, the fresh food compartment 30 and the insulation component 31 can be fixedly installed on the partition frame 14 by means of fastening such as clips, threads, or riveting. In this way, based on the setting of the partition frame 14, it is convenient to fix the fresh food compartment 30 and / or the insulation component 31, and on the other hand, it can make the internal layout of the refrigeration appliance 100 more tidy.

[0102] In addition, to improve aesthetics, the refrigeration appliance 100 also includes a shielding plate 15, which covers the insulation component 31 and the fresh food compartment 30 and is fixedly assembled with the divider 14, thereby preventing the insulation component 31 and the fresh food compartment 30 from being exposed to the user (for example, the fresh food compartment 30 and the insulation component 31 cannot be directly seen in the refrigerator compartment 101), and the shielding plate 15 can also be used to place items to form a shelf.

[0103] Next, the cooling channel 130 is located at least partially between the air duct cover 13 and the rear wall of the inner liner 12, and includes an air inlet 131 formed on the fresh-keeping compartment 30, through which cold air in the cooling channel 130 enters the fresh-keeping space in the fresh-keeping compartment 30.

[0104] There are several options for the specific location of the air inlet 131.

[0105] For example, in a preferred embodiment, the air inlet 131 is located on the upper part of the rear wall 30c of the fresh food compartment 30, specifically higher than the cover 42 of the drawer 40. It can be understood that the rear wall 30c is a cylindrical wall opposite to the opening of the fresh food compartment 30.

[0106] Thus, corresponding to the position of the air inlet 131, the cooling channel 130 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 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, flowing forward into the preservation chamber 30.

[0107] For example, in a variation embodiment, the air inlet 131 may also be located on the top wall 30a of the fresh-keeping chamber 30, specifically in the middle of the top wall 30a. Correspondingly, the cooling channel 130 has an air inlet 132 opened on the air duct cover 13 and a channel section located between the upper side of the fresh-keeping chamber 30 and the upper insulation plate 31a. The air inlet 132 is directly opposite and connected to the rear end of the channel section, and the front end of the channel section is directly opposite and connected to the air inlet 131. In this way, the cold air in the cooling channel 130 flows between the air duct cover 13 and the rear wall of the inner liner 12, and then passes through the air inlet 132, the channel section and the air inlet 131 in sequence, and flows downward into the fresh-keeping chamber 30.

[0108] Of course, the location of the air inlet 131 and the other cooling channels 130 adapted thereto can also be implemented in other ways, not limited to the two embodiments described above.

[0109] The refrigeration appliance 100 may also be equipped with a cooling fan, which may be installed in the refrigeration compartment and / or the cooling air duct. The cooling fan may be used to drive the cold air in the refrigeration compartment to flow along the cooling air duct into the interior of the preservation compartment 30.

[0110] Preferably, the cooling fan can operate at different speeds to adjust the airflow of the cooling air.

[0111] 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 fresh-keeping compartment 30 and the refrigeration chamber, so that the cold air in the fresh-keeping compartment can return to the refrigeration chamber through the return cooling duct.

[0112] The recirculation channel forms part of the cold air duct mentioned above, specifically, it forms part of the return air duct.

[0113] In one embodiment, the cold air return duct includes a return air inlet 133 opened on the fresh food compartment 30. The cold air in the fresh food compartment 30 enters the cold air return duct through the return air inlet 133 and finally returns to the refrigeration chamber.

[0114] The location of the return air vent 133 can be chosen in several ways. For example, the return air vent 133 can be located at the lower part of the rear wall 30c of the fresh food compartment 30, specifically below the bottom wall of the drawer 40's box 41; or, for another example, the return air vent 133 can be located in the middle of the bottom wall of the fresh food compartment 30. However, the location of the return air vent 133 is not limited to these.

[0115] Furthermore, the refrigeration appliance 100 also includes a guide air duct 46, which corresponds to the air inlet 131, so that the cold air flowing into the freshness compartment 30 from the air inlet 131 can flow in the guide air duct 46, thereby guiding the cold air in the freshness compartment 30.

[0116] Here, the airflow guide duct 46 corresponds to the air inlet 131, meaning that cold air from the air inlet 131 can flow into the airflow guide duct 46, and the flow direction of at least a portion of the cold air can be restricted by the airflow guide duct 46. It is understood that the airflow guide duct 46 is not required to be sealed to the air inlet 131, nor is it required to strictly prevent cold air from flowing out of the airflow guide duct 46.

[0117] The airflow duct 46 is formed between the drawer 40 and the crisper compartment 30 and / or between the drawer 40 and the door panel 50. In this way, by arranging the airflow duct 46 on the outside of the drawer 40, the flow of cold air can be guided, making it easier for the cold air to be distributed more evenly, thereby making the temperature inside the drawer 40 more uniform and avoiding local high temperature inside the drawer 40.

[0118] In one embodiment, a portion of the airflow duct 46 is defined by guide ribs. Specifically, the outer wall of the drawer 40 is provided with a plurality of guide ribs, which define a portion of the airflow duct 46. That is, the flow of cold air can be guided by the guide ribs and its direction can be at least partially defined.

[0119] For example, specific parameters Figure 4 and Figure 9 Corresponding to the position of the air inlet 131, 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; the guide air duct 46 includes a first guide air duct 461 formed between the first guide rib 4631 and the second guide rib 4632, the first 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.

[0120] 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.

[0121] The first airflow guiding duct 461 includes an expansion section 461a near the air inlet, which has a gradually increasing width from front to back; the first airflow guiding duct 461 also includes a relatively distant equal-width section, which has a relatively constant width from front to back.

[0122] Specifically, the first guide rib 4631 includes a first inclined section 4631a and a first straight section 4631b.

[0123] The first straight section 4631b is located near the left edge of the cover plate 42 and extends in the front-back direction; while the front part of the second guide rib 4632 is parallel to the first straight section 4631b and is opposite to it on the left and right, and the rear part is located near the right edge of the cover plate 42.

[0124] The equal-width section of the first guide duct 461 is formed between the first straight section 4631b and the front portion of the second guide rib 4632, which can be referred to as the second straight section.

[0125] In addition, the rear end of the first inclined section 4631a is close to the left edge of the air inlet 131, and the first inclined section 4631a extends in an inclined manner from back to front and from right to left until it connects with the rear end of the first straight section 4631b; the rear end of the second guide rib 4632 is close to the right edge of the air inlet 131.

[0126] Preferably, the first inclined segment 4631a is configured to have an inclination angle of 30° to 60° relative to the front-back direction.

[0127] The expansion section 461a of the first guide duct 461 is formed between the first inclined section 4631a and the rear section of the second guide rib 4632.

[0128] Furthermore, the airflow duct 46 also includes a second airflow duct 462 formed between the drawer 40 and the door panel 50. In this way, the cold air entering the freshness compartment 30 first flows forward under the guidance of the first airflow duct 461, then flows downward into 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 freshness compartment 30, thereby providing as much cooling as possible to the inside of the drawer 40.

[0129] The front wall of drawer 40 is provided with forward-extending connecting plates on the left and right sides respectively, and the front end of the connecting plates is fixedly connected to the door panel 50; the second air guide duct 462 is formed between the two connecting plates, and its left and right width is approximately the same as the left and right width of the box body 41 of drawer 40.

[0130] In the embodiment shown in the accompanying drawings, both the first guide rib 4631 and the second guide rib 4632 extend continuously. In a variant embodiment, the first guide rib 4631 and the second guide rib 4632 can also be configured to extend intermittently. For example, several notches can be provided in the first straight section, making the first straight section discontinuous; similarly, several notches can be provided in the second straight section, making the second straight section discontinuous. In this way, a portion of the cold air within the first 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.

[0131] Next, the refrigeration appliance 100 includes a temperature sensor, which is mounted on the drawer 40 and located outside the airflow duct 46. This means that most, or even all, of the cold air in the crisper compartment 30 will not flow through the temperature sensor. Therefore, based on the temperature sensing results at this location, the accuracy of temperature control inside the drawer 40 can be greatly improved, avoiding spoilage caused by localized high temperatures.

[0132] In a preferred embodiment, the temperature sensor is located on the cover plate 42 and outside the first airflow duct 461, that is, outside the plurality of airflow ribs.

[0133] Of course, the temperature sensor is not limited to being located on the cover plate 42, but can also be moved to other locations outside the first airflow duct 461.

[0134] 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 temperature sensor is fixedly installed in the mounting groove 420, and its detection end is located at the detection port 422; thus, the temperature sensor can be installed on the outside of the drawer 40 and can detect the temperature inside the drawer 40 with high sensitivity.

[0135] 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 preservation compartment 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 temperature sensor, this portion of cold air will not come into excessive contact with the temperature sensor due to the obstruction of the surrounding plate 423, thereby avoiding underestimation of the temperature due to direct cold air blowing.

[0136] 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 freshness compartment 30, or have a slight gap with the inner wall of the freshness compartment 30, so as to block the cold air from contacting the temperature sensor as much as possible.

[0137] In one embodiment of the present invention, drawer 40 further has a modified atmosphere inlet 424 connecting the interior and exterior of drawer 40, and modified atmosphere channel 70 connects to the interior of drawer 40 via modified atmosphere inlet 424; a surrounding panel 423 also surrounds the modified atmosphere inlet 424. Thus, a higher temperature preservative atmosphere enters the interior of drawer 40 at modified atmosphere inlet 424, making the area near modified atmosphere inlet 424 the hottest location inside drawer 40. The temperature sensor is positioned near modified atmosphere inlet 424, thereby promptly detecting the high temperature inside drawer 40, which facilitates temperature control in conjunction with the entry of the preservative atmosphere.

[0138] As mentioned above, the temperature sensor is located on the cover plate 42, and correspondingly, the modified atmosphere inlet 424 is located on the cover plate 42. This facilitates the setting of the modified atmosphere channel 70. For example, if the modified atmosphere inlet 424 is located on the box body 41, the connection between the modified atmosphere channel 70 and the modified atmosphere inlet 424 will be difficult due to the back-and-forth movement of the box body 41. However, in one embodiment of the present invention, the modified atmosphere inlet 424 is located on the cover plate 42, which makes it very convenient to install and connect the modified atmosphere channel 70.

[0139] Specifically, the modified atmosphere channel 70 includes a pipe connector 33 fixedly installed on the fresh food compartment 30, for example, it can be integrally installed with the fresh food compartment 30. The first end of the pipe connector 33 is exposed on the outer wall of the fresh food compartment 30, and the second end is inserted and matched with the modified atmosphere inlet 424.

[0140] 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.

[0141] Here, we will introduce the installation of cover plate 42.

[0142] Specifically, the cover plate 42 is movably connected to the fresh-keeping chamber 30, and: when the box body 41 is pulled out of the fresh-keeping chamber 30, the cover plate 42 is suspended and supported on the fresh-keeping chamber 30; when the box body 41 is pushed into the fresh-keeping chamber 30, the cover plate 42 is sealed and fastened at the opening of the box body 41.

[0143] For example, the cover plate 42 has outwardly extending protrusions 411 on the left and right sides, and the left wall 30b and right wall 30d of the preservation chamber 30 are provided with limit hooks 32, with the protrusions 411 inserted into the limit hooks 32.

[0144] When the box body 41 is housed inside the fresh-keeping compartment 30, the door panel 50 closes the opening of the fresh-keeping compartment 30, and the box body 41 is in the housed state at this time. 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 fresh-keeping compartment 30, the door panel 50 opens the opening of the fresh-keeping compartment 30, and the box body 41 is in the withdrawn state at this time. The protrusion 411 is engaged in the limiting hook 32, so that the cover plate 42 is suspended and supported on the fresh-keeping compartment 30 through the engagement of the protrusion 411 and the limiting hook 32.

[0145] 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.

[0146] Furthermore, on each of the left and right sides of the box body 41, two protruding posts 411 are arranged in a front-to-back pattern. On each of the left and right sides of the preservation chamber 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 box body 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 preservation chamber 30 in an inclined state with the front end higher and the rear end lower. With this arrangement, when the box body 41 is pushed into the preservation chamber 30, it can enter under the cover plate 42 more smoothly, avoiding interference and jamming.

[0147] 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.

[0148] 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.

[0149] 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 in the preservation chamber 30.

[0150] Next, drawer 40 is provided with a ventilation window, which connects the interior of drawer 40 to the airflow duct 46. The ventilation window is sealed with a moisture-permeable membrane 43, which is configured to allow water vapor to pass through the interior of drawer 40 in one direction. In this way, water vapor inside drawer 40 can enter the airflow duct 46 through the moisture-permeable membrane 43, thereby preventing excessive humidity inside drawer 40 from causing condensation. At the same time, the cool air in the airflow duct 46 can also accelerate the airflow on the surface of the moisture-permeable membrane 43, thereby promoting the expulsion of water vapor from drawer 40.

[0151] In one embodiment, the ventilation window is specifically located on the cover plate 42, more specifically, between the first straight section and the second straight section; of course, the present invention is not limited thereto, and the ventilation window may also be specifically located in other positions of the drawer 40, such as the front wall of the box body 41.

[0152] 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 variant 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.

[0153] 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.

[0154] The specific structure and material of the gas barrier and moisture permeable membrane 43 can be implemented using techniques known in the art. For example, the following provides a specific structure of the gas barrier and moisture permeable membrane 43.

[0155] The air-barrier and moisture-permeable membrane 43 includes a support layer and an additional layer that are bonded together.

[0156] The support layer is a porous film, and its material is at least one of polyethylene, polypropylene, polystyrene, polyethylene terephthalate, and polycaprolactam, preferably polyethylene and / or polypropylene.

[0157] The pore size of the porous film is preferably 0.02 to 10 micrometers, more preferably 0.05 to 5 micrometers, and even more preferably 0.1 to 2 micrometers; the porosity is 30% to 80%, preferably 40% to 70%; and pores with a pore size within one order of magnitude of the average pore size account for more than 50% of all pores, preferably more than 80% of all pores.

[0158] The additional layer is a dense film, specifically a polyamide layer, the surface of which is chelated with phytic acid.

[0159] The polyamide layer is obtained by interfacial polymerization of polyamine and polyacrylamide chloride, and there are no particular limitations on the types of polyamine and polyacrylamide chloride.

[0160] The surface of the polyamide layer is obtained by contacting the surface of the polyamide layer with a phytic acid solution to chelate the phytic acid.

[0161] The thickness of the support layer and the polyamide additional layer is not particularly limited and can be chosen according to conventional methods in the art. For example, the thickness of the support layer is 5 to 1000 micrometers, preferably 10 to 100 micrometers; the thickness of the additional layer is 0.05 to 1 micrometer, preferably 0.1 to 0.5 micrometers.

[0162] 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.

[0163] Hooks are provided around the grating plate 44, which can be snapped into the slots around the ventilation window of the cover plate 42 to achieve fixed installation of the grating plate 44 and the cover plate 42.

[0164] 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.

[0165] 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.

[0166] For example, when the humidity sensor detects that the humidity value is within a first humidity range A2 to 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 to 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.

[0167] Furthermore, the modified atmosphere unit 60 is used to consume oxygen in the air to create an oxygen-deficient preservation atmosphere, and / or to generate oxygen to create an oxygen-rich preservation atmosphere; the modified atmosphere channel 70 connects the modified atmosphere unit 60 and the interior of the drawer 40 to allow the oxygen-deficient or oxygen-rich preservation atmosphere to enter the interior of the drawer 40.

[0168] In other words, in one embodiment, the preservation environment inside the drawer 40 is configured such that the preservation atmosphere supplied by the modified atmosphere unit 60 is either an oxygen-deficient preservation atmosphere or an oxygen-enriched preservation atmosphere.

[0169] It is understood that the oxygen-deficient preservation atmosphere refers to a preservation atmosphere in which the volume percentage of oxygen is less than the volume percentage of oxygen in the air; the oxygen-rich preservation atmosphere refers to a preservation atmosphere in which the volume percentage of oxygen is higher than the volume percentage of oxygen in the air.

[0170] Correspondingly, the refrigeration appliance 100 also includes an oxygen concentration sensor, which is disposed inside the drawer 40 to detect the oxygen concentration inside the drawer 40.

[0171] The controller of the refrigeration appliance 100 can control the operation of the controlled atmosphere unit 60 based on the oxygen concentration detected by the oxygen concentration sensor.

[0172] For example, in one embodiment, for an application scenario where the modified atmosphere unit 60 supplies an oxygen-deficient preservation atmosphere to the inside of the drawer 40, when the oxygen concentration detected by the oxygen concentration sensor is higher than the upper concentration threshold P1, the controller controls the operation of the modified atmosphere unit 60 until the oxygen concentration drops to the lower concentration threshold P2, where P2 < P1, and the controller controls the modified atmosphere unit 60 to stop.

[0173] For example, in another embodiment, for the application scenario where the modified atmosphere unit 60 supplies an oxygen-rich preservation atmosphere to the inside of the drawer 40, when the oxygen concentration detected by the oxygen concentration sensor is lower than the lower concentration threshold P3, the controller controls the operation of the modified atmosphere unit 60 until the oxygen concentration is increased to the upper concentration threshold P4, where P3 < P4, and the controller controls the modified atmosphere unit 60 to stop.

[0174] Understandable, participants Figure 10 and Figure 11 The controlled atmosphere unit 60 includes at least one anode 61 and at least one cathode 62, wherein the anode 61 is controllably connected to the positive terminal of the power supply and the cathode 62 is controllably connected to the negative terminal of the power supply.

[0175] Thus, when the controller controls the operation of the atmosphere-controlled unit 60, under the control of the controller, the positive terminal of the power supply is connected to the anode 61 and the negative terminal of the power supply is connected to the cathode 62, that is, the power supply supplies power to the atmosphere-controlled unit 60; and when the controller controls the atmosphere-controlled unit 60 to stop, under the control of the controller, the positive terminal of the power supply is connected to the anode 61 and the negative terminal of the power supply is connected to the cathode 62, that is, the power supply stops supplying power to the atmosphere-controlled unit 60.

[0176] Among them, the power supply can be the power supply loaded in the refrigeration appliance 100, such as a battery pack, or it can also be an external power supply of the refrigeration appliance 100.

[0177] Furthermore, the controlled atmosphere unit 60 further includes an inner cavity that can at least accommodate an electrolyte.

[0178] 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.

[0179] When the controlled atmosphere unit 60 operates, 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 - , thus, an oxygen-deficient fresh-keeping atmosphere can be formed outside the controlled atmosphere unit 60.

[0180] Refer Figure 12 , and for the application scenario where the controlled atmosphere unit 60 supplies an oxygen-deficient fresh-keeping atmosphere to the inside of the drawer 40, the controlled atmosphere channel 70 communicates with the outside of the controlled atmosphere unit 60. Specifically, that is, the second side of the cathode 62 is exposed in the controlled atmosphere channel 70, so as to consume oxygen in the controlled atmosphere channel 70 to form an oxygen-deficient fresh-keeping atmosphere, and this oxygen-deficient fresh-keeping atmosphere is supplied to the inside of the drawer 40.

[0181] One side 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 atmosphere. 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 an oxygen-rich fresh-keeping atmosphere.

[0182] And for the application scenario where the controlled atmosphere unit 60 supplies an oxygen-rich fresh-keeping atmosphere to the inside of the drawer 40, the controlled atmosphere channel 70 is used to supply the oxygen-rich fresh-keeping atmosphere to the inside of the drawer 40.

[0183] Specifically, for example, the controlled atmosphere channel 70 can be directly or indirectly connected to the oxygen outlet 63 of the controlled atmosphere unit 60, so that after the generated oxygen is discharged to the outside of the controlled atmosphere unit 60 through the oxygen outlet 63, it can enter the drawer 40 through the controlled atmosphere channel 70.

[0184] It can be understood that in a preferred embodiment, the refrigeration appliance 100 can include at least two fresh-keeping chambers 30, as well as drawers 40, door panels 50, a cooling channel 130, and a controlled atmosphere channel 70 that are matched with each fresh-keeping chamber 30.

[0185] Thus, for one of the preservation compartments 30, its corresponding drawer 40 and modified atmosphere channel 70 are connected to the modified atmosphere unit 60 and used to receive the oxygen-enriched preservation atmosphere from the modified atmosphere unit 60, so as to achieve the function of oxygen-enriched preservation through the drawer 40. For ease of description, this preservation compartment 30, drawer 40 and modified atmosphere channel 70 can be referred to as oxygen-enriched preservation compartment 30, oxygen-enriched drawer 40a and oxygen-enriched modified atmosphere channel 70a, respectively.

[0186] For the other preservation compartment 30, its corresponding drawer 40 and modified atmosphere channel 70 are connected to the modified atmosphere unit 60 and are used to receive the oxygen-deficient preservation atmosphere from the modified atmosphere unit 60, so as to achieve the function of oxygen-deficient preservation through the drawer 40. For ease of description, this preservation compartment 30, drawer 40 and modified atmosphere channel 70 can be referred to as oxygen-deficient preservation compartment 30, oxygen-deficient drawer 40b and oxygen-deficient modified atmosphere channel 70b, respectively.

[0187] In this way, by simultaneously setting up oxygen-enriched drawer 40a and oxygen-deficient drawer 40b, the modified atmosphere preservation function during the refrigeration period can be more diversified, and the modified atmosphere preservation unit can be made more fully utilized.

[0188] Furthermore, one end of the oxygen-deficient controlled atmosphere channel 70b can be connected to the interior of the oxygen-deficient drawer 40b (e.g., connected to the controlled atmosphere outlet 46 of the oxygen-deficient drawer 40b), and the other end can also be connected to the interior of the oxygen-deficient drawer 40b (e.g., connected to the controlled atmosphere inlet 424 of the oxygen-deficient drawer 40b). The second side of the cathode 62 is exposed in the oxygen-deficient controlled atmosphere channel 70b. Thus, the gas in the oxygen-deficient drawer 40b first flows through a section of the oxygen-deficient controlled atmosphere channel 70b to the second side of the cathode 62, where the oxygen is consumed by the electrochemical reaction that occurs in the cathode 62, forming an oxygen-deficient preservation atmosphere. Then, it returns to the interior of the oxygen-deficient drawer 40b through another section of the oxygen-deficient controlled atmosphere channel 70b. This cycle continues until the oxygen-deficient drawer 40b achieves an oxygen-deficient environment that meets the target oxygen concentration.

[0189] Regarding the composition of the electrolyte used in the modified atmosphere unit 60, and the specific structure / material of the cathode 62 and anode 61, these are common knowledge in the field of electrolysis technology. For example, the electrolyte can be water electrolyzed with low concentrations of sodium hydroxide or potassium hydroxide, or it can be other alkaline, acidic, or neutral solutions. The cathode 62 can be a composite structure formed by combining a conductive layer, a catalytic layer, a waterproof and breathable layer, or other functional layers through external pressure, heat processing, or other methods. The anode 61 can also be a conductive layer or an inert electrode. Of course, this is not a limitation; any combination of electrolyte, anode 61, and cathode 62 that can achieve an electrochemical reaction to prepare a preservative atmosphere can be used in the construction of the modified atmosphere unit 60 of this invention.

[0190] In addition, the modified atmosphere unit 60 also includes an electrolysis box 600, which has at least one window.

[0191] 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.

[0192] 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.

[0193] In summary, the beneficial effects of one embodiment of the present invention are as follows: by combining the configuration of the controlled atmosphere channel 70, the cooling channel 130, the freshness compartment 30, and the drawer 40, the present invention, on the one hand, supplies a freshness-preserving atmosphere to the inside of the drawer 40 to achieve controlled atmosphere preservation of the storage environment inside the drawer 40; on the other hand, it supplies cold air to the outside of the drawer 40 and the inside of the freshness compartment 30 to achieve cold air cooling in the small space outside the drawer 40. While efficiently maintaining the low temperature environment inside the drawer 40, it avoids a large amount of cold air entering the drawer 40 and causing the atmosphere inside the drawer 40 to fluctuate drastically with the cooling demand. In this way, both the temperature inside the drawer 40 and the freshness-preserving atmosphere are taken into account, thereby achieving excellent food storage and preservation effects.

[0194] 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.

[0195] 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 an open fresh-keeping compartment and a refrigeration compartment with a refrigeration unit installed. A drawer movably housed within the preservation compartment includes a box body with an access opening and a cover for opening and closing the access opening; The door panel connected to the box body moves synchronously with the box body and closes the opening of the preservation compartment; A cooling aisle connects the refrigeration compartment and the fresh-keeping compartment, allowing cold air from the refrigeration compartment to flow into the fresh-keeping compartment and out of the drawer; A modified atmosphere unit, located outside the fresh food storage room, is used to create a fresh food storage atmosphere; A modified atmosphere channel connects the modified atmosphere unit and the interior of the drawer to allow a preservative atmosphere to enter the interior of the drawer.

2. The refrigeration appliance according to claim 1, characterized in that, The controlled atmosphere unit is used to consume oxygen in the air to create an oxygen-deficient preservation atmosphere, and / or to generate oxygen to create an oxygen-rich preservation atmosphere. The modified atmosphere channel connects the modified atmosphere unit and the interior of the drawer to allow either an oxygen-deficient or oxygen-enriched preservation atmosphere to enter the interior of the drawer.

3. The refrigeration appliance according to claim 2, characterized in that, The modified atmosphere unit is configured as an electrolytic modified atmosphere unit that forms a preservative atmosphere 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 controlled atmosphere channel. The cathode is used to consume the oxygen in the controlled atmosphere channel through an electrochemical reaction to create an oxygen-deficient preservation atmosphere. Alternatively, one or both sides of the anode are exposed in the cavity, and the anode is used to generate oxygen in the cavity through an electrochemical reaction to form an oxygen-rich preservation atmosphere, and the modified atmosphere channel supplies the oxygen-rich preservation atmosphere to the interior of the drawer.

4. The refrigeration appliance according to claim 1, characterized in that, The preservation chamber is configured with a cylindrical structure; The cooling channel has an air inlet located on the fresh-keeping compartment; The refrigeration appliance also includes a guide air duct corresponding to the air inlet for the flow of cold air, the guide air duct being formed between the drawer and the crisper compartment and / or between the drawer and the door panel.

5. The refrigeration appliance according to claim 4, characterized in that, The refrigeration appliance includes a temperature sensor, which is mounted on the drawer and located outside the airflow duct.

6. The refrigeration appliance according to claim 5, characterized in that, The drawer's outer wall is provided with a mounting groove and a surrounding panel around the mounting groove; The mounting slot has a detection port that communicates with the interior of the drawer; The temperature sensor is fixedly installed in the mounting groove, and its detection end is located at the detection port; The panel extends from the outer wall of the drawer to the inner wall of the crisper compartment.

7. The refrigeration appliance according to claim 6, characterized in that, The drawer also has a controlled atmosphere inlet connecting the interior and exterior of the drawer, and the panel surrounds the controlled atmosphere inlet. The controlled atmosphere channel connects to the interior of the drawer via the controlled atmosphere inlet.

8. The refrigeration appliance according to claim 7, characterized in that, The controlled atmosphere inlet is located on the cover plate; The modified atmosphere channel includes a pipe connector fixedly installed on the fresh-keeping chamber, one end of which is exposed on the outer wall of the fresh-keeping chamber, and the other end is inserted into the modified atmosphere inlet.

9. The refrigeration appliance according to claim 8, characterized in that, The cover plate is movably installed on the preservation chamber; When the box is pulled forward from the preservation chamber, the cover is suspended inside the preservation chamber.

10. The refrigeration appliance according to claim 4, characterized in that, The outer wall of the drawer is provided with a plurality of guide ribs, which define at least a portion of the airflow duct.

11. The refrigeration appliance according to claim 10, characterized in that, The cover plate has a ventilation window that connects the inside of the drawer to the air duct. The ventilation window is sealed and covered with an air-barrier and moisture-permeable membrane, which is configured to allow water vapor to enter or exit the interior of the drawer in one direction only.

12. The refrigeration appliance according to claim 10, characterized in that, The cooling channel has an air inlet located on the fresh-keeping compartment, and the air inlet is located on the upper part of the rear wall of the fresh-keeping compartment opposite to the opening. The plurality of guide ribs include a first guide rib and a second guide rib disposed on the cover plate, wherein the first guide rib and the second guide rib are disposed opposite each other on the left and right sides; The airflow duct includes a first airflow duct formed between the first airflow rib and the second airflow rib, the first airflow duct being directly opposite the air inlet to guide cold air to flow forward along the cover plate.

13. The refrigeration appliance according to claim 12, characterized in that, The first guide rib and the second guide rib extend from the rear edge of the cover plate to the front edge of the cover plate, respectively; The first airflow duct includes a rearward expansion section and a frontward equal-width section. The width of the expansion section gradually increases from front to back, while the width of the equal-width section remains constant from front to back.

14. The refrigeration appliance according to claim 12, characterized in that, The airflow duct also includes a second airflow duct formed between the drawer and the door panel.

15. The refrigeration appliance according to claim 1, characterized in that, The refrigeration device includes an oxygen concentration sensor; The oxygen concentration sensor is located inside the drawer to detect the oxygen concentration inside the drawer.

16. The refrigeration appliance according to claim 1, characterized in that, The box body includes an inner liner that encloses a compartment, and the fresh-keeping compartment is installed inside the compartment; The refrigeration appliance includes an insulation component and an air duct cover. The insulation component surrounds the outside of the fresh-keeping compartment, and the air duct cover is assembled to the rear wall of the inner liner. The cooling channel is at least partially located between the air duct cover and the rear wall of the inner liner, and includes an air inlet formed on the fresh-keeping compartment, through which cold air enters the fresh-keeping compartment.

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