Refrigeration equipment

Abstract

The refrigeration equipment comprises a fresh-keeping chamber, a cold air supply path, a drawer and a cover plate, an interlayer air path is formed between a door plate and a front cover of the drawer, a cold air cavity is formed between the cover plate and the upper wall of the fresh-keeping chamber, the cover plate comprises a moisture permeable module, and cold air blown out of an air outlet forwards blows through the cold air cavity and then downwards blows into the interlayer air path. According to the refrigeration equipment, through the combined design of the moisture-permeable module and the air path, when cold air blows through the cover plate and refrigerates the drawer, excessive moisture in the drawer passes through the moisture-permeable module and is taken away by airflow, so that the humidity in the drawer is effectively reduced, and the cold air blows forwards from the rear of the cavity and blows downwards from the interlayer air path in the front, so that the moisture in the drawer is effectively reduced. The upper surface of the whole cover plate can become a surface through which cold air blows, so that it is possible that the moisture permeable module is arranged on the upper surface of the cover plate as much as possible, the cold air blown out of the cold air supply path is ingeniously utilized to refrigerate and take away moisture at the same time, and the fresh-keeping effect of food materials is improved through large-area refrigeration and humidity adjustment.

Description

Technical Field

[0001] This invention relates to the field of cold storage and preservation technology, and more particularly to a refrigeration device. Background Technology

[0002] On the one hand, as modern families increasingly demand higher standards for food preservation, users are placing greater emphasis on the preservation environment of household refrigerators for fresh vegetables, meat, and other fresh ingredients. On the other hand, existing refrigeration equipment typically uses direct cooling or simple airflow to preserve food. However, because food itself releases moisture during storage, this moisture easily forms frost or condensation on the refrigerator's walls at low temperatures, leading to a decreased user experience. Both of these issues require solutions through humidity control.

[0003] However, how to control the humidity regulation effect of refrigeration equipment, and how to balance the relationship between refrigeration and humidity regulation, as well as between humidity regulation and equipment cost, are all urgent problems to be solved in cold storage and preservation. For example, if the refrigeration effect is not guaranteed while regulating humidity, or if it takes a long time to adjust the humidity to reach a suitable value, or if it requires high costs, the problem of humidity regulation cannot be solved well. Summary of the Invention

[0004] To address the problem of humidity control in existing technologies, the present invention aims to provide a refrigeration device that effectively regulates humidity and provides good cooling performance.

[0005] To achieve the above-mentioned objective, one embodiment of the present invention provides a refrigeration device, comprising:

[0006] A fresh food storage room includes a cavity, the front end of which has an opening, and an air outlet is provided at the rear of the cavity;

[0007] A cooling air supply path, wherein the cooling air supply path is connected to the air outlet;

[0008] A drawer, which is received in the cavity through the opening, the drawer including a door panel, a front cover and an upward opening, and an air passage is formed between the door panel and the front cover;

[0009] A cover plate is disposed in the cavity, the cover plate closes the opening located below it, a cold air cavity is formed between the cover plate and the upper wall of the preservation chamber, the cover plate includes a moisture permeable module, the humidity difference between the internal cavity of the opening and the cold air cavity is adjusted by the moisture permeable module, and the cold air blown out of the air outlet blows forward through the cold air cavity and then blows downward into the interlayer air passage.

[0010] As a further improvement of the present invention, the cover plate also includes a cover body, on which a groove is provided, and the moisture-permeable module is accommodated in the groove.

[0011] As a further improvement of the present invention, a plurality of air guide plates are provided on the cover body, and the plurality of air guide plates guide the cold air to cover the moisture-permeable module in multiple directions.

[0012] As a further improvement of the present invention, the plurality of air guide plates respectively form a left air path, a right air path and a middle air path, the air volume of the left air path and the right air path are basically the same, and the air volume of the left air path and the right air path are both greater than the air volume of the middle air path.

[0013] As a further improvement of the present invention, the plurality of air guide plates include a left air guide plate, a right air guide plate and a plurality of middle air guide plates, and the cold air cavity is enclosed between the left air guide plate, the right air guide plate, the cover plate and the upper wall;

[0014] The left air path is formed between the left air guide plate and one of the middle air guide plates, and the right air path is formed between the right air guide plate and one of the middle air guide plates. The middle air guide plate extends in the front-back direction. The distance between the left air guide plate and the middle air guide plate gradually increases along the airflow direction, and the distance between the right air guide plate and the middle air guide plate gradually increases along the airflow direction.

[0015] As a further improvement of the present invention, the refrigeration device further includes a temperature sensor, which is disposed on the side of the cover plate facing the upper wall and on the outside of the cold air cavity.

[0016] As a further improvement of the present invention, the cooling air supply path includes an air outlet for discharging air from the cooling air chamber, and the temperature sensor is disposed on the side of the cover plate near the air outlet.

[0017] As a further improvement of the present invention, the rear end of the moisture-permeable module is close to the air guide plate, and the distance between the front end of the moisture-permeable module and the front edge of the cover plate, the distance between the left end and the left edge of the cover plate, and the distance between the right end and the right edge of the cover plate are all minimum distances that meet the structural strength requirements.

[0018] As a further improvement of the present invention, a return air vent is provided at the rear of the cavity, and a return air cavity is formed between the first bottom plate of the drawer and the second bottom plate of the fresh-keeping compartment. The return air vent faces the return air cavity, and the airflow blown out of the air outlet passes sequentially through the cold air cavity, the interlayer air passage and the return air cavity and blows towards the return air vent.

[0019] As a further improvement of the present invention, the refrigeration equipment further includes a cold storage compartment, wherein the airflow in the cold storage compartment is blown toward the return air inlet via the interlayer air passage and the return air cavity;

[0020] The refrigerated compartment is located above the fresh-keeping compartment, and the air outlet is located above the return air outlet.

[0021] As a further improvement of the present invention, the moisture-permeable module is configured as a salt solution, a solid adsorbent, a washing gel, or an electrolytic dehumidification module.

[0022] As a further improvement of the present invention, the refrigeration device further includes a humidity sensor, which is disposed on the side of the cover plate facing the drawer;

[0023] The wind speed inside the cooling cavity is adjusted according to the humidity detected by the humidity sensor, and the change in humidity value is positively correlated with the change in wind speed value.

[0024] As a further improvement of the present invention, the drawer is supplied with a controlled oxygen flow, which makes the oxygen concentration inside the drawer different from the oxygen concentration outside.

[0025] As a further improvement of the present invention, the refrigeration device further includes a first sealing ring and a second sealing ring, the first sealing ring being circumferentially around the opening and abutting between the fresh-keeping compartment and the drawer; the drawer includes an upper abutting edge circumferentially around the opening, and the second sealing ring being circumferentially around the opening and abutting between the cover plate and the upper abutting edge.

[0026] As a further improvement of the present invention, the fresh-keeping compartment includes a plurality of hooks, and the cover plate includes hook bodies corresponding to the hooks. The hook bodies are hung on the hooks to fix the cover plate relative to the fresh-keeping compartment.

[0027] Compared with the prior art, the present invention has the following beneficial effects: The refrigeration equipment, through the combined design of the moisture-permeable module and the air duct, allows the cold air to pass over the cover plate and cool the drawer while excess moisture inside the drawer is carried away by the airflow through the moisture-permeable module, thereby effectively reducing the humidity inside the drawer and preventing condensation and frost. On the other hand, the cold air blows from the back of the cavity to the front and blows downward from the front interlayer air duct. In other words, the entire upper surface of the cover plate can be covered by the cold air. This layout makes it possible to place the moisture-permeable module on the upper surface of the cover plate as large as possible, thereby forming a larger area of ​​moisture permeation and cooling. In this way, by cleverly utilizing the cold air blown out by the cold air duct to remove moisture while cooling, the large-area cooling and humidity regulation improves the preservation effect of food and ensures the long-term preservation of food in the drawer under low temperature and high humidity conditions. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the structure of a refrigeration device according to an embodiment of the present invention;

[0029] Figure 2This is a partial structural schematic diagram of a refrigeration device according to an embodiment of the present invention;

[0030] Figure 3 yes Figure 2 Exploded view of the middle structure;

[0031] Figure 4 This is a cross-sectional view of the drawer portion according to an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of the drawer and cover plate according to an embodiment of the present invention;

[0033] Figure 6 This is a top view of a cover plate according to an embodiment of the present invention;

[0034] Figure 7 This is a cross-sectional view of a cover plate according to an embodiment of the present invention;

[0035] Figure 8 This is a structural schematic diagram of the preservation room from the rear view according to an embodiment of the present invention;

[0036] Figure 9 This is a structural schematic diagram of the preservation room from the front view according to an embodiment of the present invention;

[0037] Figure 10 This is a schematic diagram of the structure of an embodiment of the present invention;

[0038] Among them, 100, refrigeration equipment; 10, fresh-keeping compartment; 101, cold air cavity; 102, double-layer air duct; 103, return air cavity; 110, opening; 111, cavity; 11, air outlet; 12, return air outlet; 13, upper wall; 14, second bottom plate; 15, hook; 20, drawer; 210, open opening; 21, door panel; 22, front cover; 23, first bottom plate; 24, upper supporting edge; 30, cover plate; 31, moisture-permeable module; 32, cover body; 321, groove; 33, left air guide plate; 34, middle air guide plate; 35, right air guide plate; 36, left air duct; 37, middle air duct; 38, right air duct; 39, hook body; 40, cold storage compartment; 50, air duct cover plate; 51, air outlet; 60, first sealing ring; 70, second sealing ring; 80, temperature sensor. Detailed Implementation

[0039] The present invention will now be described in detail with reference to the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional modifications made by those skilled in the art based on these embodiments are included within the scope of protection of the present invention.

[0040] It should be understood that terms such as “above,” “over,” “below,” and “under” used herein to indicate spatial relative position are for illustrative purposes to describe the relationship of one unit or feature relative to another unit or feature as shown in the accompanying drawings. The terms “spatial relative position” may be intended to include different orientations of the equipment in use or operation other than those shown in the figures.

[0041] One embodiment of the present invention provides a refrigeration device 100 that effectively regulates humidity and has a good cooling effect.

[0042] The refrigeration device 100 in this embodiment can be a refrigerator, freezer, wine cabinet, or refrigerated display case. The following description uses a refrigerator as an example. The overall structure of the refrigerator is as follows: Figure 1 As shown.

[0043] The refrigerator includes a refrigeration system, a fresh-keeping compartment 10, a cooling air supply circuit, drawers 20, and a cover 30. The refrigeration system includes a compressor, condenser, capillary tube, evaporator, fan, and refrigeration piping. The evaporator can be located in an evaporator chamber, and there can be one or more evaporators. For example, in a refrigerator with separate refrigeration compartments 40 and 40 (freezing compartment), separate evaporators are provided for the refrigerator and freezer compartments. The cooling air supply circuit connects the fresh-keeping compartment 10 and the refrigeration system, and can blow the cold air from the evaporator in the evaporator chamber into the refrigeration compartment.

[0044] like Figure 2 As shown, the fresh food storage compartment 10 is a compartment specifically designed for the preservation of fresh ingredients. The humidity and / or oxygen concentration in the fresh food storage compartment 10 are adjustable. The fresh food storage compartment 10 includes a cavity 111 with an opening 110. An air outlet 11 is provided at the rear of the cavity 111. A drawer 20 is housed in the cavity 111 through the opening 110. The drawer 20 includes an opening 210. Users can pull out the drawer 20 through the opening 110 and take ingredients out of the drawer 20 by opening it.

[0045] To clearly express the positions and directions described in this embodiment, in this embodiment, the direction of gravity is defined as up and down, that is, the direction of gravity is down and the opposite direction is up. When the user operates the items inside the refrigerator, the user stands in front of the refrigerator, and the opposite direction is behind. The two sides of the plane containing the front, back, up, and down are the left and right sides, respectively. Correspondingly, the opening 110 is located in front of the fresh food compartment 10, and the opening 210 is located above the drawer 20. The drawer 20 is pushed and pulled in the front-back direction.

[0046] like Figure 3 and 4As shown, the cover plate 30 is disposed in the cavity 111. When the drawer 20 is located in the cavity 111, the cover plate 30 closes the opening 210. A cold air cavity 101 is formed between the cover plate 30 and the upper wall 13 of the preservation compartment 10. The cover plate 30 includes a moisture permeable module 31. The lower part of the moisture permeable module 31 faces the opening 210, and the upper part of the moisture permeable module 31 faces the cold air cavity 101. The cold air path supplies cold air to the cold air cavity 101 through the air outlet 11.

[0047] The moisture-permeable module 31 utilizes the humidity difference between the inside and outside of drawer 20 to absorb and permeate moisture. Moisture exchange occurs between the inside and outside of drawer 20 through the moisture-permeable module 31. When the humidity inside drawer 20 is significantly higher than the humidity outside, the passive moisture-permeable capacity of the module 31 carries water vapor from inside drawer 20 to the outside. This passive dehumidification capability is stronger, especially when the airflow speed outside drawer 20 is faster and the external air pressure is lower. Conversely, if the airflow speed outside drawer 20 is slower, the moisture-permeable capacity of the module 31 is weaker, allowing for a higher humidity level inside drawer 20. In other words, the higher the airflow speed outside drawer 20, the lower the humidity inside drawer 20, and vice versa.

[0048] By setting up a moisture-permeable module 31 and a cover 30, the upper opening 210 of the drawer 20 is closed when it is inside the fresh food compartment 10, and a cold air cavity 101 is formed between the cover 30 and the upper wall 13 of the fresh food compartment 10. On the one hand, the moisture-permeable module 31 can effectively regulate the humidity inside the drawer 20, so that the moisture released by the food during the storage process can be discharged in time, avoiding the formation of condensation or frost. On the other hand, the sealing effect of the cover 30 ensures that a relatively sealed environment is formed inside the drawer 20, and the humidity is not easily lost, thereby ensuring a relatively high humidity inside the drawer 20 and improving the preservation effect inside the fresh food compartment 10.

[0049] The cold air blown from the cooling air supply path blows towards the cold air chamber 101, which is located above the drawer 20. The cold air is indirectly transferred to the drawer 20 through the cover plate 30. At the same time, the cold air blows over the surface of the moisture permeability module 31, which can carry away the moisture in the moisture permeability module 31 and improve the moisture permeability of the moisture permeability module 31. This structural design utilizes the existing cooling and air blowing environment of the air-cooled refrigerator to achieve better moisture permeability. In other words, through the cooperation of the cooling air supply path and the refrigeration system, the cold air can not only complete the cooling task, but also improve the moisture regulation effect, avoiding dependence on independent air ducts or fans, simplifying the system structure, and reducing energy consumption and costs.

[0050] like Figure 3 and 10As shown, drawer 20 includes a door panel 21 and a front cover 22. A sandwiched air passage 102 is formed between the door panel 21 and the front cover 22. The airflow from the air outlet 11 passes sequentially through the cold air cavity 101, the sandwiched air passage 102, and the return air cavity 103 before being blown towards the return air outlet 12. Through the sandwiched air passage 102 between the door panel 21 and the front cover 22, cold air can pass through the sandwiched air passage 102 in front of the drawer 20 and then flow into the return air cavity 103 below, ensuring that the cold air can more fully indirectly contact multiple areas above, in front of, and below the drawer 20, further improving the temperature uniformity and humidity control effect.

[0051] The cold air blown out of the air outlet 11 blows forward through the cold air cavity 101 and then downwards into the interlayer air passage 102. In other words, the cold air blows from the rear end of the cover plate 30 all the way to the front end. If the baffle guiding the airflow is positioned as close to the edge as possible, the cold air blown out of the air outlet 11 can cover the entire upper surface of the cover plate 30. Therefore, the moisture-permeable module 31 can also be made as large as possible, extending from the rear end to the front end of the cover plate 30. This allows the entire upper surface of the cover plate 30 to be covered by the cold air. This layout makes it possible to place the moisture-permeable module 31 on the upper surface of the cover plate 30 as large as possible, making the entire upper surface of the cover plate 30 a humidity-regulating surface, thus creating a larger area for moisture permeation and cooling. Considering scenarios with some borders, the moisture-permeable module 31 can cover more than 80% of the upper surface of the cover plate 30; if the border is small enough, it can even reach more than 90%.

[0052] like Figures 5-7 As shown, the cover plate 30 also includes a cover body 32, on which a groove 321 is provided, and the moisture-permeable module 31 is housed within the groove 321. This allows for smoother airflow across the upper surface of the moisture-permeable module 31 when cold air blows across the surface of the cover plate 30, compared to the moisture-permeable module 31 being completely fixed to the upper surface of the cover body 32. Ideally, the upper surface of the cover body 32 and the upper surface of the moisture-permeable module 31 can be almost flush, or the upper surface of the moisture-permeable module 31 can be slightly protruding from the upper surface of the cover body 32. Furthermore, the moisture-permeable module 31 embedded in the groove 321 makes the installation more stable and reliable. The moisture-permeable module 31 housed in the groove 321 can be more tightly integrated with the cover plate 30, preventing displacement or loosening of the module and the cover plate 30, and preventing shaking or detachment from the cover body 32 during use, thus improving the durability and stability of the entire system.

[0053] Multiple air guides are installed on the lid body 32, directing cold air in multiple directions to cover the moisture-permeable module 31. These multiple guides ensure more even distribution of cold air across the module, guaranteeing uniformity and efficiency in the moisture permeation process. This prevents localized concentration of cold air, which could lead to poor moisture permeation in certain areas, and maintains consistent humidity and pressure differences across the module, thus improving overall efficiency. Furthermore, the multiple directions of cold air coverage also result in more uniform airflow within the drawer 20, further enhancing temperature uniformity and providing better preservation for food.

[0054] Furthermore, such as Figure 5 As shown, multiple air guide plates include a left air guide plate 33, a right air guide plate 35, and multiple intermediate air guide plates 34. The left air guide plate 33, the right air guide plate 35, the cover plate 30, and the upper wall 13 enclose a cold air cavity 101. A left air passage 36 is formed between the left air guide plate 33 and one of the intermediate air guide plates 34, and a right air passage 38 is formed between the right air guide plate 35 and one of the intermediate air guide plates 34. The intermediate air guide plates 34 extend in the front-back direction. The air volume of the left air passage 36 and the right air passage 38 is basically the same. The air volume of the left air passage 36 and the right air passage 38 is greater than the air volume of the intermediate air passage 37.

[0055] The left and right air ducts 38 have a larger air volume, allowing the cold air to quickly cover the left and right sides of the entire drawer 20, while the central air duct 37 has a smaller air volume, preventing excessive airflow in the central area from causing localized overcooling or overly rapid humidity adjustments. This optimized airflow design ensures more even and stable temperature and humidity throughout the drawer 20, further enhancing the preservation of food, making it particularly suitable for fresh meats that require precise temperature and humidity control.

[0056] like Figure 5 and 6 As shown, the distance between the left guide plate 33 and the middle guide plate 34 gradually increases along the airflow direction, and the distance between the right guide plate 35 and the middle guide plate 34 gradually increases along the airflow direction.

[0057] The gradual increase in distance can be achieved using a straight-line tilt or an arc-shaped structure, so that the left air guide plate 33 and the right air guide plate 35 form an angle with the front-back direction. This angle can range from 30° to 60°. Furthermore, according to the location of the temperature sensor 80 described below, the left air guide plate 33 and the right air guide plate 35 can be positioned to accommodate it.

[0058] This gradually widening design effectively optimizes the airflow path, avoiding localized airflow obstruction or turbulence, and improving the smoothness of airflow throughout the entire airflow path. This not only helps improve the cooling effect but also prevents energy loss of the cold air in the airflow path, thus improving overall energy efficiency. Furthermore, the gradually widening design allows the cold air to be more evenly distributed into the moisture-permeable module 31 and drawer 20 as it passes through the air guide plate, further enhancing the preservation effect.

[0059] like Figures 5-7 As shown, in this embodiment, the rear end of the moisture-permeable module 31 is adjacent to the air guide plate. The distances between the front end of the moisture-permeable module 31 and the front edge of the cover plate 30, the distance between the left end and the left edge of the cover plate 30, and the distance between the right end and the right edge of the cover plate 30 are all minimum distances that meet the structural strength requirements. Because the groove 321 must have a certain edge width to ensure structural strength, within the allowable range of structural strength, the moisture-permeable module 31 can be made as large as possible by making the front edge, left edge, and right edge of the groove 321 of the cover plate 30 as narrow as possible. In addition, the moisture-permeable module 31 can be made as large as possible because of the air path arrangement, which allows it to be large within the condition that the frame width is sufficient. If the air outlet is not at the very end, if the air outlet cannot extend all the way to the front end, and the air path cannot cover the entire length of the cover plate 30 from front to back, then the front-to-back length of the moisture-permeable module 31 cannot be made longer.

[0060] In addition, the moisture-permeable module 31 is positioned relatively far back. Specifically, in the front-to-back direction, the moisture-permeable module 31 can be installed 0-3 cm forward of the contact point between the rear wall of the drawer 20 and the cover 30. Since the temperature at the air outlet 11 is relatively lower, the area below the cover 30 near the air outlet 11 is more prone to condensation or frost. Therefore, placing the moisture-permeable module 31 closer to the air outlet 11 is more conducive to timely exhaust of moisture and its removal by airflow to avoid condensation or frost. Thus, the further back the moisture-permeable module 31 is, the better. Here, the position of the moisture-permeable module 31 can be determined by considering the relationship between the air outlet 11 and the air vent 51, the contact point between the rear wall of the drawer 20 and the cover 30, and the length of the middle air guide plate 34.

[0061] like Figure 3 and 5As shown, the refrigeration device 100 also includes a temperature sensor 80, which is located on the side of the cover 30 facing the upper wall 13 and on the outside of the cold air cavity 101. The temperature sensor 80 can detect the temperature inside the drawer 20 in real time, thereby effectively controlling the temperature of the cold air inside the cold air cavity 101 to ensure that the cold air is always within the optimal preservation temperature range. In addition, if the temperature sensor 80 is in the cold air, it will directly detect the temperature of the cold air and cannot accurately reflect the temperature inside the drawer 20, which is not conducive to temperature control of the drawer 20. Therefore, the location of the temperature sensor 80 avoids its direct exposure to the cold air flow, reduces temperature detection errors, and can further accurately control the temperature to improve the preservation quality of food.

[0062] Furthermore, the cooling air supply path includes an air outlet 51 for discharging air into the cooling air chamber 101, and a temperature sensor 80 is disposed on the side of the cover plate 30 near the air outlet 51. By monitoring the temperature of the air outlet 11 in real time, the temperature sensor 80 can adjust the supply of cooling air in a timely manner, thus enabling real-time detection of the air outlet temperature and ensuring that the cooling air output by the cooling air supply path is always kept within the required temperature range.

[0063] like Figure 3 , 8 As shown in Figure 9, the fresh-keeping compartment 10 of this embodiment includes an air outlet 11 that directs airflow toward the cavity 111. The refrigeration system includes an evaporator, and the cooling air supply path includes an air duct that blows cold air from the evaporator toward the air outlet 11. The air outlet 11 directs airflow toward the cold air cavity 101. In this way, the refrigeration system and the cooling air supply path are closely integrated, so that the cold air, after flowing through the evaporator, can be blown into the fresh-keeping compartment 10 more evenly and efficiently.

[0064] In addition, such as Figure 4 , 8 As shown in Figure 9, the fresh-keeping compartment 10 includes a return air inlet 12 facing the cavity 111 for air return. A return air cavity 103 is formed between the first bottom plate 23 of the drawer 20 and the second bottom plate 14 of the fresh-keeping compartment 10, with the return air inlet 12 facing the return air cavity 103. A cold air return circulation can be formed between the air outlet 11 and the return air inlet 12. The cold air can not only evenly cover the inside of the drawer 20, but also achieve efficient circulation of cold air through the design of the return air cavity 103.

[0065] This embodiment uses indirect cooling to cool drawer 20, preventing cold air from blowing directly onto the food inside and avoiding the loss of internal moisture by airflow. This prevents the humidity inside drawer 20 from becoming too low, resulting in better preservation. A damper can be installed at the air outlet 11. The opening and closing of the damper and the speed of the fan can be controlled according to the required humidity and temperature inside drawer 20. This allows the flow of cold air on the surface of cover 30 to improve the moisture permeability of the moisture permeation module 31, achieving simultaneous cooling and dehumidification.

[0066] Furthermore, such as Figure 1 As shown, the refrigeration equipment 100 also includes a cold storage compartment 40. Airflow within the cold storage compartment 40 is directed towards the return air vent 12 via a double-layered air duct 102 and a return air chamber 103. The cold storage compartment 40 is located above the fresh-keeping compartment 10, and the air outlet 11 is located above the return air vent 12. In other words, the cold storage compartment 40 and the fresh-keeping compartment 10 each have their own air outlet ducts, but share the same return air duct, forming two sets of air outlets and one set of return air, thus simplifying the airflow path. Furthermore, when the temperature in the fresh-keeping compartment 10 meets the requirements, the damper at the air outlet 11 of the fresh-keeping compartment 10 can be closed, while the return air from the cold storage compartment 40 simultaneously maintains the lower temperature of the fresh-keeping compartment 10, thereby improving the overall refrigeration efficiency.

[0067] In addition, the refrigeration device 100 also includes a humidity sensor, which is located on the side of the cover 30 facing the drawer 20; the air speed in the cold air cavity 101 is adjusted according to the humidity detected by the humidity sensor, and the change in humidity value is positively correlated with the change in air speed value.

[0068] A humidity sensor monitors the humidity inside drawer 20 in real time and adjusts the fan speed accordingly. This means the fan speed is adjusted based on actual humidity requirements to keep the humidity inside drawer 20 within the optimal range. When the humidity is high and needs to be reduced, the fan speed is increased; conversely, when the humidity is relatively low, the fan speed is decreased to slow down the evaporation of moisture from the moisture-permeable module 31. The fan speed can be adjusted by controlling different duty cycles of the fan, for example, within the range of 30% to 70%, matching different humidity levels with different duty cycles. This design effectively prevents excessively low humidity from causing a dry environment or excessively high humidity from causing a problem, thereby improving the overall preservation effect.

[0069] The drawer 20 is supplied with an oxygen-controlled flow, ensuring that the oxygen concentration inside the drawer 20 differs from the external oxygen concentration. This difference in oxygen concentration achieves better preservation. For example, depending on the characteristics of different foods—some requiring relatively low oxygen, others relatively high oxygen—the oxygen concentration can be adjusted accordingly. This effectively slows down the oxidation and spoilage process of food, especially for oxygen-sensitive foods such as fresh meat and fruit, further extending their shelf life and quality.

[0070] The oxygen flow is supplied by an oxygen regulation module, which includes at least one anode and at least one cathode. The anode is controllably connected to the positive terminal of the power supply, and the cathode is controllably connected to the negative terminal of the power supply.

[0071] Thus, when the controller controls the oxygen regulating module to run, under the control of the controller, the positive terminal of the power supply is connected to the anode and the negative terminal of the power supply is connected to the cathode, that is, the power supply supplies power to the oxygen regulating module; and when the controller controls the oxygen regulating module to stop, under the control of the controller, the positive terminal of the power supply is connected to the anode and the negative terminal of the power supply is connected to the cathode, that is, the power supply stops supplying power to the oxygen regulating module.

[0072] The oxygen control module also includes an inner cavity that can at least contain the electrolyte, with a first side of the cathode exposed in the inner cavity and a second side exposed to the external air of the oxygen control module.

[0073] When the oxygen regulating module is running, i.e., when it is energized, the cathode is used to consume oxygen from the outside air through an electrochemical reaction. Specifically, oxygen undergoes a reduction reaction at the cathode, with the reaction formula being O2 + 2H2O + 4e-. - →4OH - In this way, an oxygen-deficient preservation atmosphere can be formed outside the oxygen-regulating module.

[0074] One or both sides of the anode are exposed in the inner cavity. The anode is used to generate oxygen in the inner cavity through an electrochemical reaction to create an oxygen-rich preservation atmosphere. Specifically, OH- in the electrolyte... - An oxidation reaction can occur at the anode to produce oxygen, with the reaction formula being 4OH⁻. - →O2 + 2H2O + 4e - The generated oxygen is collected to create an oxygen-rich preservation atmosphere.

[0075] This allows you to adjust the oxygen concentration as needed and choose a suitable oxygen-deficient or oxygen-enriched preservation atmosphere.

[0076] like Figure 3 As shown, the refrigeration device 100 also includes a first sealing ring 60 and a second sealing ring 70. The first sealing ring 60 surrounds the opening 110 and abuts against the space between the fresh-keeping compartment 10 and the drawer 20. The drawer 20 includes an upper abutting edge 24 surrounding the opening 210, and the second sealing ring 70 surrounds the opening 210 and abuts against the space between the cover plate 30 and the upper abutting edge 24. The design of the first sealing ring 60 and the second sealing ring 70 ensures the airtightness between the drawer 20 and the fresh-keeping compartment 10 and the cover plate 30. The first sealing ring 60 and the second sealing ring 70 effectively prevent outside air from entering the drawer 20, maintaining a stable gas and humidity environment inside the drawer 20, and further improving the fresh-keeping effect inside the drawer 20.

[0077] like Figure 6 and 9As shown, the fresh-keeping compartment 10 includes multiple hooks 15, and the cover plate 30 includes hook bodies 39 corresponding to the hooks 15. The hook bodies 39 are hung on the hooks 15 to fix the cover plate 30 relative to the fresh-keeping compartment 10. By setting hooks 15 and corresponding hook bodies 39 on the fresh-keeping compartment 10 to fix the cover plate 30 relative to the fresh-keeping compartment 10, on the one hand, the cover plate 30 is more stable during installation and disassembly, preventing it from shifting or loosening due to external forces, thus further improving the stability and service life of the entire equipment. On the other hand, it also facilitates cleaning and maintenance operations for users during use, improving the ease of use of the equipment.

[0078] The moisture-permeable module 31 can be configured as a salt solution, a solid adsorbent, a washing gel, or an electrolytic dehumidification module. The salt solution can be a solution such as lithium bromide, lithium chloride, or calcium chloride. The pressure difference between the partial pressure of water vapor in the treated air and the vapor pressure at the surface of the hygroscopic solution serves as the driving force for moisture transfer. The humidity of the air is controlled by the hygroscopic and dehumidifying properties of the solution. The electrolytic dehumidification module can apply direct current to the electrodes and use an electrolyte membrane to remove moisture from the container. The moisture is electrolytically decomposed into hydrogen ions and oxygen. The hydrogen ions migrate through the electrolyte membrane to the cathode side, combine with oxygen in the air to form water molecules, and are discharged outside the container.

[0079] Compared with commonly used technologies, this embodiment has the following advantages:

[0080] The refrigeration equipment 100, through the combined design of the moisture-permeable module 31 and the air duct, allows cold air to pass over the cover plate 30 and cool the drawer 20. At the same time, excess moisture in the drawer 20 passes through the moisture-permeable module 31 and is carried away by the airflow, thereby effectively reducing the humidity in the drawer 20 and preventing condensation and frost. By cleverly utilizing the cold air blown out by the cooling air duct to cool while removing moisture, the preservation effect of food is improved, ensuring the long-term freshness of food in the drawer 20 under low temperature and high humidity conditions.

[0081] 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.

[0082] The detailed descriptions listed above are merely specific descriptions of feasible embodiments of the present invention, and are not intended to limit the scope of protection of the present invention. All equivalent embodiments 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 device, characterized in that, include: A fresh food storage compartment (10) includes a cavity (111) with an opening (110) at the front end of the cavity (111) and an air outlet (11) at the rear of the cavity (111). A cooling air supply path, wherein the cooling air supply path is connected to the air outlet (11); A drawer (20) is housed in the cavity (111) through the opening (110). The drawer (20) includes a door panel (21), a front cover (22), and an upward opening (210). An interlayer air passage (102) is formed between the door panel (21) and the front cover (22). A cover plate (30) is disposed inside the cavity (111). The cover plate (30) closes the opening (210) located below it. A cold air cavity (101) is formed between the cover plate (30) and the upper wall (13) of the preservation chamber (10). The cover plate (30) includes a moisture-permeable module (31). The humidity difference between the internal cavity of the opening (210) and the cold air cavity (101) is adjusted by the moisture-permeable module (31). The cold air blown out by the air outlet (11) blows forward through the cold air cavity (101) and then blows downward into the interlayer air passage (102).

2. The refrigeration equipment according to claim 1, characterized in that, The cover plate (30) also includes a cover body (32), on which a groove (321) is provided, and the moisture-permeable module (31) is housed in the groove (321).

3. The refrigeration equipment according to claim 2, characterized in that, Multiple air guide plates are provided on the cover body (32), which guide the cold air to cover the moisture-permeable module (31) in multiple directions.

4. The refrigeration equipment according to claim 3, characterized in that, The multiple air guide plates respectively enclose a left air path (36), a right air path (38) and a middle air path (37). The air volume of the left air path (36) and the right air path (38) is basically the same, and both are greater than the air volume of the middle air path (37).

5. The refrigeration equipment according to claim 4, characterized in that, The plurality of air guides include a left air guide (33), a right air guide (35), and a plurality of intermediate air guides (34) that enclose the left air path (36), the right air path (38), and the middle air path (37). The distance between the left air guide (33) and the intermediate air guide (34), and the distance between the right air guide (35) and the intermediate air guide (34) gradually increase along the airflow direction.

6. The refrigeration equipment according to claim 5, characterized in that, The refrigeration equipment also includes a temperature sensor (80), which is located on the outside of the cold air cavity (101).

7. The refrigeration equipment according to claim 6, characterized in that, The cooling air supply path includes an air outlet (51) for discharging air from the cooling air chamber (101), and the temperature sensor (80) is disposed on the side of the cover plate (30) near the air outlet (51).

8. The refrigeration equipment according to claim 3, characterized in that, The rear end of the moisture-permeable module (31) is close to the air guide plate. The distance between the front end of the moisture-permeable module (31) and the front edge of the cover plate (30), the distance between the left end and the left edge of the cover plate (30), and the distance between the right end and the right edge of the cover plate (30) are all the minimum distances that meet the structural strength requirements.

9. The refrigeration equipment according to claim 1, characterized in that, A return air vent (12) is provided at the rear of the cavity (111). A return air cavity (103) is formed between the first bottom plate (23) of the drawer (20) and the second bottom plate (14) of the fresh food compartment (10). The return air vent (12) faces the return air cavity (103). The airflow blown out by the air outlet (11) passes through the cold air cavity (101), the interlayer air passage (102) and the return air cavity (103) in sequence and blows towards the return air vent (12).

10. The refrigeration equipment according to claim 9, characterized in that, The refrigeration equipment also includes a cold storage compartment (40), and the airflow in the cold storage compartment (40) is blown to the return air inlet (12) through the interlayer air passage (102) and the return air cavity (103); The refrigerated compartment (40) is located above the fresh-keeping compartment (10), and the air outlet (11) is located above the return air outlet (12).

11. The refrigeration equipment according to claim 1, characterized in that, The moisture-permeable module (31) is configured as a salt solution, a solid adsorbent, a washing gel, or an electrolytic dehumidification module.

12. The refrigeration equipment according to claim 1, characterized in that, The refrigeration device also includes a humidity sensor, which is disposed on the side of the cover (30) facing the drawer (20); The wind speed in the cooling air cavity (101) is adjusted according to the humidity detected by the humidity sensor, and the change in humidity value is positively correlated with the change in wind speed value.

13. The refrigeration equipment according to claim 1, characterized in that, The drawer (20) is supplied with a controlled oxygen flow, which makes the oxygen concentration inside the drawer (20) different from the oxygen concentration outside.

14. The refrigeration equipment according to claim 1, characterized in that, The refrigeration equipment also includes a first sealing ring (60) and a second sealing ring (70). The fresh food compartment (10) and the drawer (20) are sealed by the first sealing ring (60), and the drawer (20) and the cover plate (30) are sealed by the second sealing ring (70).

15. The refrigeration equipment according to claim 1, characterized in that, The fresh-keeping compartment (10) includes a plurality of hooks (15), and the cover plate (30) includes hooks (39) corresponding to the hooks (15). The hooks (39) are hung on the hooks (15) to fix the cover plate (30) relative to the fresh-keeping compartment (10).

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