Refrigeration equipment

Abstract

The refrigeration equipment comprises a plurality of fresh-keeping chambers and a fresh-keeping module, the fresh-keeping module comprises a gas outlet for outputting fresh-keeping gas, one fresh-keeping chamber is communicated with the gas outlet, and one fresh-keeping chamber is communicated with the other fresh-keeping chamber in a gas flow series connection mode. And the concentration of the fresh-keeping gas in the other fresh-keeping chamber is changed along with the change of the concentration of the fresh-keeping gas in one fresh-keeping chamber. According to the equipment, the gas concentration of each fresh-keeping chamber can be adjusted with very low pipeline layout difficulty, a stable gas gradient can be formed among the fresh-keeping chambers, the requirements of different food materials on different fresh-keeping environments in the same equipment are met, the fresh-keeping performance of the equipment is improved, the production and control cost is reduced, and the product quality is improved. And meanwhile, more flexible use experience is provided for the user.

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] In existing refrigeration equipment technology, especially in refrigeration equipment used for food preservation, only temperature can usually be adjusted. However, different gas concentrations have a direct and significant impact on the preservation effect of certain foods (such as fresh vegetables, fruits, and fresh meat). For example, different concentrations of oxygen, carbon dioxide, and water vapor are suitable for different foods. Fresh vegetables and fruits have different rates of respiration and oxidation in high-oxygen or low-oxygen environments. Adjusting the oxygen concentration can significantly reduce their spoilage and oxidation rate. Similarly, for meat, oxygen concentration not only affects its color but also inhibits the growth and reproduction of anaerobic bacteria.

[0003] While some refrigeration equipment has attempted to incorporate gas regulation technology, it often only allows for gas concentration adjustment within a single compartment. On one hand, adjusting the concentration in multiple compartments significantly increases the complexity of piping layout. In existing refrigerators, adding a separate piping system and control mechanism for each compartment greatly increases both volume and cost. On the other hand, it's difficult to provide suitable gas concentration ranges for different foods. Therefore, current technology has significant limitations in multi-compartment gas concentration regulation and cannot meet the need for simultaneous gas concentration adjustment in multiple compartments. Summary of the Invention

[0004] To address the problem of how to regulate gas concentration in multiple compartments in existing technologies, the present invention aims to provide a refrigeration device that can simultaneously regulate gas in multiple compartments with lower cost and smaller space requirements.

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

[0006] Multiple fresh food storage compartments;

[0007] A preservation module includes an outlet for outputting preservation gas, a preservation chamber connected to the outlet, and the airflow of the one preservation chamber and another preservation chamber are connected in series. The concentration of the preservation gas in the other preservation chamber varies with the concentration of the preservation gas in the first preservation chamber.

[0008] As a further improvement of the present invention, one of the preservation compartments is connected to the other preservation compartment in series for airflow communication, and the airflow output from the preservation module passes through the first preservation compartment and reaches the other preservation compartment.

[0009] As a further improvement of the present invention, the gas concentration of the preservation gas output by the preservation module for adjustment includes oxygen concentration, or carbon dioxide concentration, or water vapor concentration, or nitrogen concentration, or oxygen concentration and water vapor concentration, or carbon dioxide concentration and water vapor concentration.

[0010] As a further improvement of the present invention, the preservation module adjusts the gas concentration in one of the preservation chambers to be lower than the concentration of the corresponding component in the outside.

[0011] As a further improvement of the present invention, one of the preservation chambers includes a first air inlet, a first return air inlet and a first air outlet, the preservation module includes a return air inlet, the other preservation chamber includes a second air inlet, the air outlet is connected to the first air inlet, the first return air inlet is connected to the return air inlet, and the first air outlet is connected to the second air inlet.

[0012] As a further improvement of the present invention, the other preservation compartment also includes a second return air vent, which is connected to the return air vent.

[0013] As a further improvement of the present invention, the refrigeration device further includes a fluid drive component that drives the airflow in one of the preservation chambers to blow towards the other preservation chamber.

[0014] As a further improvement of the present invention, the fluid drive component controls the airflow rate so that the gas concentration in the other preservation chamber is lower than the concentration of the corresponding component in the outside environment but higher than the concentration of the corresponding component in the first preservation chamber.

[0015] As a further improvement of the present invention, the fluid drive component is configured as a fan or an air pump.

[0016] As a further improvement of the present invention, one of the preservation chambers further includes a third air inlet, and the other preservation chamber further includes a second air outlet, the second air outlet being connected to the third air inlet.

[0017] As a further improvement of the present invention, one of the preservation chambers includes a first air inlet and a first air outlet, the preservation module includes a return air outlet, the other preservation chamber includes a second air inlet and a second return air outlet, the air outlet is connected to the first air inlet, the first air outlet is connected to the second air inlet, and the second return air outlet is connected to the return air outlet.

[0018] As a further improvement of the present invention, the concentration of the gas adjusted by the preservation gas is the oxygen concentration;

[0019] The other fresh-keeping compartment is provided with a first drawer, the opening of the first drawer facing upwards. The other fresh-keeping compartment is located below the first fresh-keeping compartment. The opening of the first air outlet faces downwards, and the opening of the second air inlet faces upwards. The gas flowing into the second air inlet enters the opening downwards.

[0020] As a further improvement of the present invention, the preservation module adjusts the gas concentration in one of the preservation chambers to be higher than the concentration of the corresponding component in the outside.

[0021] As a further improvement of the present invention, one of the preservation chambers includes a first air inlet and a first air outlet, the other preservation chamber includes a second air inlet, the air outlet is connected to the first air inlet, and the first air outlet is connected to the second air inlet.

[0022] As a further improvement of the present invention, the preservation module is housed in one of the preservation chambers, the preservation module further includes an air inlet and an air outlet, the first preservation chamber includes a first air outlet, the other preservation chamber includes a second air inlet, the air outlet discharges preservation gas in the first preservation chamber, the air inlet and the air outlet are connected to the outside gas, and the first air outlet is connected to the second air inlet.

[0023] As a further improvement of the present invention, one of the plurality of preservation compartments is connected to the air outlet.

[0024] or,

[0025] One of the multiple preservation compartments is connected in series with one of the preservation compartments or the other preservation compartment via airflow.

[0026] Compared with the prior art, the present invention has the following beneficial effects: By improving the structure and gas path design of the refrigeration equipment, multiple preservation compartments are connected in series. The gas concentration changes with the change of one preservation compartment, affecting the gas concentration of other preservation compartments, thus achieving dynamic and flexible adjustment. It eliminates the need for the preservation module to regulate each preservation compartment with independent pipelines and control structures, thereby adjusting the gas concentration of each preservation compartment with very low pipeline layout difficulty. In addition, a stable gas gradient can be formed between each preservation compartment, meeting the requirements of different foods for different preservation environments in the same equipment, improving the preservation performance of the equipment, reducing production and control costs, and providing users with a more flexible user experience. Attached Figure Description

[0027] Figure 1 This is a structural block diagram of multiple preservation compartments and preservation modules in Embodiment 1 of the present invention;

[0028] Figure 2This is a schematic diagram of the structure of multiple preservation compartments and preservation modules in Embodiment 1 of the present invention;

[0029] Figure 3 This is an exploded view of another preservation compartment and preservation module of Embodiment 1 of the present invention;

[0030] Figure 4 This is a top view of another preservation chamber and preservation module in Embodiment 1 of the present invention;

[0031] Figure 5 This is a cross-sectional view of another preservation compartment and preservation module in Embodiment 1 of the present invention;

[0032] Figure 6 yes Figure 5 A magnified view of a section at point A in the middle;

[0033] Figure 7 This is a schematic diagram of the structure of one of the preservation compartments in Embodiment 1 of the present invention;

[0034] Figure 8 This is a structural block diagram of multiple preservation compartments and preservation modules in Embodiment 2 of the present invention;

[0035] Figure 9 This is a structural block diagram of the multiple preservation compartments and preservation modules in Embodiment 3 of the present invention;

[0036] Figure 10 This is a structural block diagram of the multiple preservation compartments and preservation modules in Embodiment 4 of the present invention;

[0037] Figure 11 This is an exploded view of multiple preservation compartments and preservation modules in Embodiment 4 of the present invention;

[0038] Figure 12 This is a cross-sectional view of multiple preservation compartments and preservation modules in Embodiment 4 of the present invention;

[0039] Figure 13 This is a structural block diagram of the multiple preservation compartments and preservation modules in Embodiment 5 of the present invention;

[0040] Figure 14 This is a structural block diagram of the multiple preservation compartments and preservation modules of Embodiment 6 of the present invention;

[0041] Figure 15 This is a structural block diagram of the multiple preservation compartments and preservation modules in Embodiment 7 of the present invention;

[0042] Figure 16 This is a structural block diagram of the multiple preservation compartments and preservation modules of Embodiment 8 of the present invention;

[0043] Among them, 10, a first fresh-keeping compartment; 11, a first air inlet; 12, a first return air inlet; 13, a first air outlet; 14, a third air inlet; 15, a second drawer; 20, another fresh-keeping compartment; 21, a second air inlet; 22, a second return air inlet; 23, a second air outlet; 24, a first drawer; 30, a fresh-keeping module; 31, an air outlet; 32, a return air inlet; 33, an air inlet; 34, an exhaust outlet; 40, a fluid drive component; 41, a windward end face; 42, an air outlet end; 50, a sealing component; 60, another fresh-keeping compartment. Detailed Implementation

[0044] 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.

[0045] 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.

[0046] One embodiment of the present invention provides a refrigeration device that allows for convenient adjustment of the concentration of preservative gases in multiple preservation compartments, with a convenient adjustment process. It achieves airflow guidance from one preservation compartment 10 to another preservation compartment 20, facilitating the formation of various oxygen concentration gradients within the multiple compartments. This not only meets the different preservation needs of various foods but also improves the preservation effect and the energy efficiency of the device.

[0047] The refrigeration equipment in this embodiment can be a refrigerator, freezer, wine cabinet, or refrigerated cabinet, etc. The following description uses a refrigerator as an example.

[0048] A refrigerator includes a refrigeration system, an inner liner, refrigeration compartments, multiple fresh-keeping compartments, cooling components, and a fresh-keeping module 30. The refrigeration system includes a compressor, condenser, capillary tube, evaporator, and refrigeration piping. The refrigeration compartments can be refrigerator compartments, freezer compartments, variable-temperature compartments, etc. The following description of the refrigeration compartments will use the refrigerator compartment as an example.

[0049] The preservation module 30 includes an outlet 31 for outputting preservation gas. The concentration of the preservation gas output by the preservation module 30 can be adjusted to include oxygen concentration, carbon dioxide concentration, water vapor concentration, nitrogen concentration, or both oxygen and water vapor concentration, or both carbon dioxide and water vapor concentration. Different preservation gases can meet the preservation needs of different types of food. For example, adjusting the oxygen concentration helps prolong the freshness of meat, while adjusting the carbon dioxide concentration can inhibit the respiration of fruits and vegetables, thereby extending their shelf life. Controlling the water vapor concentration can maintain the humidity in the preservation room and prevent food from drying out due to water loss. In other words, the preservation module 30 provides a variety of preservation modes for its corresponding preservation gases, satisfying the need for fine adjustment of different gas components on the one hand, and the structure is highly versatile and can be applied to different structures on the other. Adjusting the nitrogen concentration also corresponds to changes in oxygen content; for example, the higher the nitrogen concentration, the lower the corresponding oxygen content. The purpose of adjusting the nitrogen concentration is the same as that of adjusting the oxygen concentration.

[0050] The inner liner encloses a refrigeration compartment with an opening. Multiple fresh-keeping compartments can be located within the refrigeration compartment, and drawers can be accommodated within the fresh-keeping compartment. The drawers can be pulled out or moved into the fresh-keeping compartment. The environment of the fresh-keeping module 30 is relatively isolated from the refrigeration compartment. In other words, without considering absolute airtightness, the space inside each fresh-keeping compartment is relatively isolated from the space inside the refrigeration compartment. In addition, since absolute airtightness is not required, the internal air pressure will not increase drastically after gas is introduced into the fresh-keeping compartment.

[0051] One of the multiple preservation compartments, preservation compartment 10, is connected to air outlet 31. Preservation compartment 10 is connected in series with another preservation compartment 20. The concentration of preservation gas in the other preservation compartment 20 changes with the concentration of preservation gas in the first preservation compartment 10.

[0052] The airflow between multiple preservation compartments is connected in series, ensuring that the preservation gas output from the preservation module 30 flows sequentially through each compartment. This achieves dynamic and coordinated adjustment of gas concentrations in different preservation compartments. The series structure simplifies the overall gas path layout, reduces the number of independent gas paths within the equipment, and lowers system complexity and manufacturing costs. This series design ensures that each preservation compartment automatically adjusts according to changes in the gas concentration of the preceding compartment, ensuring the equipment can flexibly adapt to the preservation needs of different foods. It achieves excellent preservation results, especially in scenarios requiring precise control of oxygen or carbon dioxide concentrations.

[0053] The preservation module 30 can adjust the gas concentration within one of its preservation chambers 10 to be lower or higher than the concentration of the corresponding components in the outside environment. For example, if the preservation gas primarily regulates oxygen concentration, the preservation module 30 can adjust the oxygen concentration within its preservation chamber 10 to be lower or higher than the oxygen concentration in the outside environment; if the preservation gas primarily regulates carbon dioxide concentration, the preservation module 30 can adjust the carbon dioxide concentration within its preservation chamber 10 to be lower or higher than the carbon dioxide concentration in the outside environment; if the preservation gas primarily regulates water vapor concentration, the preservation module 30 can adjust the humidity within its preservation chamber 10 to be lower or higher than the humidity in the outside environment.

[0054] The following explanation uses oxygen concentration adjustment as an example; the preservation module 30 is the oxygen-regulating module used to adjust oxygen concentration. Taking the preservation module 30's use in regulating a low-oxygen environment as an example, precise oxygen concentration control can provide a stable low-oxygen environment for stored food, inhibiting respiration and extending shelf life. The benefits of a low-oxygen environment include significantly reducing the oxidation rate of food and decreasing microbial growth, especially for perishable fruits and vegetables, where the preservation effect is particularly significant. Because this solution can precisely control oxygen concentration, it avoids the problem of unstable food quality caused by excessive oxygen concentration fluctuations in traditional equipment, thus ensuring long-term preservation.

[0055] Taking the preservation module 30 for regulating a high-oxygen environment as an example, some foods, such as fresh pork, beef, and lamb, have better storage effects in environments with higher oxygen concentrations. The higher oxygen concentration in the high-oxygen packaging inhibits the growth and reproduction of anaerobic bacteria. Furthermore, the higher oxygen concentration can combine with deoxymyoglobin on the muscle surface to form a thicker layer of oxymyoglobin, maintaining the bright red color of the meat and improving its color stability. Simultaneously, the higher oxygen concentration protects the meat's color because lower oxygen concentrations induce deoxymyoglobin to oxidize into methemoglobin. Under higher oxygen concentrations, the meat surface is primarily composed of oxymyoglobin, which does not directly oxidize into methemoglobin. The preservation module 30 can also be used to regulate the oxygen concentration between one preservation compartment 10 and another preservation compartment 20, ensuring that their oxygen concentrations are higher than the external oxygen concentration.

[0056] In addition, the preservation module 30 includes at least one anode and at least one cathode, with the anode being controllably connected to the positive terminal of the power supply and the cathode being controllably connected to the negative terminal of the power supply.

[0057] Thus, when the controller controls the preservation module 30 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 preservation module 30; and when the controller controls the preservation module 30 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 preservation module 30.

[0058] The preservation module 30 also includes an inner cavity that can at least contain electrolyte, with a first side of the cathode exposed in the inner cavity and a second side exposed to the outside air of the preservation module 30.

[0059] When the preservation module 30 is running, i.e., when it is energized, the cathode is used to consume oxygen in the external 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 30.

[0060] 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.

[0061] This allows you to adjust the oxygen concentration as needed and choose a suitable oxygen-deficient or oxygen-enriched preservation atmosphere.

[0062] The following describes several embodiments. Embodiments 1-4 mainly describe the adjustment of two fresh-keeping compartments in a low-oxygen environment, Embodiments 5-6 mainly describe the adjustment of two fresh-keeping compartments in a high-oxygen environment, and Embodiments 7-8 mainly describe more connection methods for three fresh-keeping compartments.

[0063] Example 1

[0064] like Figures 1-7 As shown, one of the fresh-keeping compartments 10 includes a first air inlet 11, a first return air inlet 12 and a first air outlet 13, the fresh-keeping module 30 includes a return air inlet 32, and the other fresh-keeping compartment 20 includes a second air inlet 21. The air outlet 31 is connected to the first air inlet 11, the first return air inlet 12 is connected to the return air inlet 32, and the first air outlet 13 is connected to the second air inlet 21.

[0065] One of the preservation compartments 10 is connected to the preservation module 30 and another preservation compartment 20 via a first air inlet 11, a first return air inlet 12, and a first air outlet 13, forming a complete gas circulation system. This ensures effective gas flow between the preservation module 30, the first preservation compartment, and the second preservation compartment, guaranteeing controllable changes in gas concentration within the two compartments. After entering the first preservation compartment 10, a portion of the gas returns to the preservation module 30 via the first return air inlet 12, forming a closed loop, while the remaining gas reaches the other preservation compartment 20 via the first air outlet 13, thus achieving stable control of the gas composition. Under this structure, the oxygen concentration in the other preservation compartment 20 will be higher than that in the first preservation compartment 10, but lower than the external oxygen concentration.

[0066] like Figures 3-6 As shown, the refrigeration equipment also includes a fluid drive 40, which drives the airflow in one of its preservation compartments 10 to blow towards another preservation compartment 20.

[0067] 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 drawer is pushed and pulled in the front-back direction.

[0068] The fluid drive 40 controls the airflow rate so that the gas concentration in the other preservation chamber 20 is lower than the concentration of the corresponding component in the outside environment, but higher than the concentration of the corresponding component in the first preservation chamber 10.

[0069] The fluid drive unit 40 drives the airflow in one of the preservation compartments 10 to blow it into another preservation compartment 20. In the specific oxygen concentration adjustment process, the oxygen concentration in the first preservation compartment 10 can be adjusted to a lower concentration first. Then, under the action of the fluid drive unit 40, the air with a lower oxygen concentration is blown into the other preservation compartment 20. On the one hand, the oxygen concentration in the other preservation compartment 20 will not be lower than that in the first compartment. On the other hand, by controlling the rotation speed and operating time of the fluid drive unit 40, the other preservation compartment 20 can be adjusted to any value within the range between the atmospheric oxygen concentration and the oxygen concentration in the first preservation compartment 10. This precise adjustment creates different oxygen concentration ranges in the first and second preservation compartments 20, achieving flexible adjustment of different oxygen concentration environments within the same refrigeration equipment at low cost.

[0070] In this configuration, one preservation compartment 10 has the lowest oxygen concentration, suitable for storing oxygen-sensitive ingredients such as fresh-cut fruits and tender leafy vegetables; while the other preservation compartment 20 has a slightly higher oxygen concentration, but still lower than the ambient temperature, suitable for storing general fruits, vegetables, or meats. This gradient oxygen concentration distribution effectively inhibits the oxidation rate and respiration of different types of ingredients, while avoiding cross-contamination caused by uneven oxygen concentration. Furthermore, by adjusting the operating state of the fluid drive component 40 and the output parameters of the oxygen regulation module, the oxygen concentration can be flexibly adjusted to meet diverse needs in different scenarios, significantly improving the preservation effect of food.

[0071] Another fresh-keeping compartment 20 is provided with a first drawer 24, the opening of the first drawer 24 facing upwards. The other fresh-keeping compartment 20 is located below the first fresh-keeping compartment 10. The opening of the first air outlet 13 faces downwards, and the opening of the second air inlet 21 faces upwards. The gas flowing into the second air inlet 21 enters the opening downwards.

[0072] Vertical airflow is achieved by connecting the first air outlet 13 of one preservation compartment 10 with the second air inlet 21 of the other preservation compartment 20. The vertical layout saves horizontal space, effectively utilizes the longer internal structure of the refrigeration equipment, improves the efficiency of internal space utilization, simplifies the design of airflow channels, and facilitates later maintenance and management.

[0073] Furthermore, the fluid drive component 40 is configured as a fan or air pump. Taking a centrifugal fan as an example, the windward end 41 of the centrifugal fan faces the first air outlet 13, and the air outlet 42 on the side of the centrifugal fan faces the second air inlet 21. Utilizing the characteristic of the centrifugal fan to provide strong centrifugal force, the centrifugal fan can provide higher static pressure when rotating at high speed, making the airflow within the channel smoother. It can generate a stable and strong airflow in a small space, allowing the preservation gas to be quickly and evenly distributed in one preservation compartment 10 and the other preservation compartment 20, ensuring that the oxygen concentration in the other preservation compartment 20 is quickly adjusted to the appropriate level. In addition, the centrifugal fan can flexibly change the airflow velocity and flow rate by adjusting its rotation speed, thereby more precisely controlling the flow state of the gas between the two preservation compartments. Figure 5 As shown, the air-facing end 41 of the centrifugal fan faces the air outlet, and the air outlet end 42 on the side of the centrifugal fan faces the air inlet. Figure 3As shown, the centrifugal fan is located in the central area of ​​the upper wall, allowing the airflow to diffuse evenly in all directions. This avoids the problem of oxygen concentration being too high or too low in certain areas due to fan misalignment. Furthermore, when this airflow is blown into the other preservation compartment 20, it forms a stable circulation structure within the other preservation compartment 20, spiraling towards the entire first drawer 24. This improves the uniformity of oxygen in the other preservation compartment 20, ensuring that the gas in every corner of the first drawer 24 can be fully exchanged, thereby improving the overall uniformity and efficiency of oxygen regulation.

[0074] In addition, such as Figure 2 As shown, a second drawer 15 can be installed in one of the fresh-keeping compartments 10, such as... Figure 7 As shown, the first air inlet 11, the first return air inlet 12, and the first air outlet 13 are all located at the bottom of one of the preservation compartments 10. In this way, the preservation gas is blown downward into the other preservation compartment 20 after fully filling the space in one of the preservation compartments 10. The arrangement of the first air inlet 11, the first return air inlet 12, and the first air outlet 13 does not affect the pushing and pulling of the second drawer 15.

[0075] A sealing element 50 can be installed at the connection between one fresh-keeping compartment 10 and another fresh-keeping compartment 20 to ensure a seal, thereby isolating the fresh-keeping gas from the refrigerator compartment, preventing irregular airflow, and avoiding gas leakage.

[0076] In this embodiment, only the preservative gas is blown from one preservation compartment 10 to the other preservation compartment 20. There are no other air vents in the other preservation compartment 20. Gas with a lower oxygen concentration is blown in, forcing the gas with a higher oxygen content inside through gaps into the refrigeration compartment, preventing excessive pressure increase within the other preservation compartment 20. The fluid drive component 40 ensures a more powerful influx of preservative gas into the other preservation compartment 20.

[0077] Example 2

[0078] Example 2 Figure 8 As shown, based on Embodiment 1, it also includes: another fresh-keeping compartment 20 further includes a second return air vent 22, which is connected to the return air vent 32.

[0079] Example 2 adds a return air vent to another preservation compartment 20, enabling the preservation gas to form a similar circulation loop within the other preservation compartment 20 as in the first preservation compartment 10. This dual-loop design further improves the efficiency of gas concentration regulation, ensuring that the gas concentration in both preservation compartments can be precisely controlled. It is particularly suitable for foods requiring long-term preservation, as it can maintain the stability of gas concentration through return air circulation.

[0080] Example 3

[0081] Example 3 Figure 9As shown, based on Embodiment 1, it further includes: one of the preservation chambers 10 includes a third air inlet 14, and the other preservation chamber 20 includes a second air outlet 23, which is connected to the third air inlet 14.

[0082] Example 3 incorporates multiple air inlets and outlets between the two preservation chambers to ensure sufficient circulation and flow of the preservation gas. This design is particularly suitable for preservation applications requiring continuous gas exchange, such as for foods that need rapid temperature or humidity reduction. Low-oxygen gas blown from one preservation chamber 10 into the other can return to the first chamber 10, facilitating gas flow. Through multiple gas channels, the device can more effectively regulate the gas concentration and temperature within the chambers, further enhancing the preservation effect.

[0083] Example 4

[0084] Example 4 Figures 10-12 As shown, one of the fresh-keeping compartments 10 includes a first air inlet 11 and a first air outlet 13, the fresh-keeping module 30 includes a return air outlet 32, and the other fresh-keeping compartment 20 includes a second air inlet 21 and a second return air outlet 22. The air outlet 31 is connected to the first air inlet 11, the first air outlet 13 is connected to the second air inlet 21, and the second return air outlet 22 is connected to the return air outlet 32. Figure 12 In the middle, on the right side of another fresh-keeping compartment 20, that is, on the side close to the fresh-keeping module 30, a second return air vent 22 is provided, and the fresh-keeping module 30 is provided with a return air vent 32 facing the other fresh-keeping compartment 20.

[0085] The difference between Example 4 and Example 1 is that one of the preservation chambers 10 does not simultaneously perform the functions of air intake and air return. Instead, the function of air return is performed by another preservation chamber 20. Preservation gas is blown from the preservation module 30 into one of the preservation chambers 10, then into the other preservation chamber 20, and then back to the preservation module 30 to complete the cycle. This ensures that the gas concentration in each chamber is almost the same, which can avoid the problem of uneven gas concentration, especially in scenarios where the same oxygen concentration is required in multiple chambers.

[0086] Example 5

[0087] Example 5 Figure 13 As shown, the preservation module 30 adjusts the gas concentration in one of its preservation chambers 10 to be higher than the concentration of the corresponding components in the outside environment. Specifically, the oxygen concentration can be higher than the oxygen concentration in the outside environment. Oxygen can inhibit the growth of anaerobic bacteria, thereby extending the preservation time of meat.

[0088] One of the fresh-keeping compartments 10 includes a first air inlet 11 and a first air outlet 13, and the other fresh-keeping compartment 20 includes a second air inlet 21. The air outlet 31 is connected to the first air inlet 11, and the first air outlet 13 is connected to the second air inlet 21.

[0089] The difference between Example 5 and Examples 1-4 is that, in a high-oxygen environment, the preservation gas output by the preservation module 30 can be pure oxygen. Once oxygen is introduced into the preservation chamber, regardless of the amount, it can rapidly increase the oxygen concentration in the chamber, thus eliminating the need for a return air design. Figure 13 In this process, gas only needs to flow from the preservation module 30 into one preservation chamber 10 and another preservation chamber 20 in sequence.

[0090] In addition, since the oxygen purity entering another fresh-keeping compartment 20 is lower than that entering its first fresh-keeping compartment 10, the oxygen concentration in the first fresh-keeping compartment 10 is naturally higher than that in the other fresh-keeping compartment 20. This creates a stable oxygen gradient between the fresh-keeping compartments. Then, each compartment is filled with food with its most suitable oxygen concentration. Through a simple pipeline design, the storage environment requirements of different foods are met, satisfying the preservation needs of meat and other foods that require a high-oxygen environment.

[0091] Example 6

[0092] Example 6 Figure 14 As shown, the preservation module 30 is housed in one of its preservation chambers 10. The preservation module 30 also includes an air inlet 33 and an exhaust outlet 34. One of its preservation chambers 10 includes a first air outlet 13, and the other preservation chamber 20 includes a second air inlet 21. The exhaust outlet 31 discharges preservation gas into one of its preservation chambers 10. The air inlet 33 and the exhaust outlet 34 are connected to the outside gas. The first air outlet 13 is connected to the second air inlet 21.

[0093] By directly housing the preservation module 30 within its preservation chamber 10, the efficiency of gas concentration regulation is further improved, and potential gas loss during flow is reduced, ensuring that the preservation gas can act on the food quickly and efficiently. Simultaneously, the air inlet 33 and exhaust outlet 34 of the preservation module 30 are connected to the outside environment, ensuring a continuous supply of fresh air during operation and maintaining the stability of the gas composition.

[0094] Example 7

[0095] Example 7 Figure 15 As shown, one of the multiple fresh-keeping compartments, the fresh-keeping compartment 60, is connected in series with one of the fresh-keeping compartments 10 or another fresh-keeping compartment 20.

[0096] The additional preservation compartment 60 can be a third, fourth, or even Nth preservation compartment, expanding the gas regulation capabilities of the equipment. This additional preservation compartment 60 is connected to another preservation compartment 20. On one hand, this allows the equipment to create different gas concentration distributions in multiple preservation compartments. Taking low-oxygen gas as an example, the oxygen concentration is in the order of preservation compartment 10 < another preservation compartment 20 < additional preservation compartment 60 < outside air, further enhancing the equipment's preservation capabilities and meeting more diverse food needs. On the other hand, by further promoting this series-connected gas regulation structure, multi-stage series connection can be achieved, adjusting the gas concentration in each preservation compartment with very low piping layout complexity. This design ensures that the equipment can still provide simple and precise multi-stage gas control even in multi-compartment configurations.

[0097] Example 8

[0098] Example 8 Figure 16 As shown, one of the multiple fresh-keeping compartments, the second fresh-keeping compartment 60, is connected to the air outlet 31. That is to say, in more embodiments, some of the multiple fresh-keeping compartments of the refrigeration equipment can be connected in series and some in parallel. For example, there are multiple fresh-keeping compartments directly connected to the fresh-keeping module 30. Taking low-oxygen gas as an example, the oxygen concentration is in the order of first fresh-keeping compartment 10 = second fresh-keeping compartment 60 < another fresh-keeping compartment 20 < outside, which meets the needs of more diverse food ingredients.

[0099] Compared with commonly used technologies, this embodiment has the following advantages:

[0100] By improving the structure and gas path design of the refrigeration equipment, multiple preservation compartments are connected in series. The gas concentration changes with the change of one preservation compartment 10, affecting the gas concentration of other preservation compartments. This achieves dynamic and flexible adjustment, eliminating the need for each preservation module 30 to regulate each preservation compartment with independent piping and control structures. As a result, the gas concentration of each preservation compartment can be adjusted with very low piping layout difficulty. In addition, a stable gas gradient can be formed between each preservation compartment, meeting the different preservation environment requirements of different foods in the same equipment. This improves the preservation performance of the equipment, reduces production and control costs, and provides users with a more flexible user experience.

[0101] 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.

[0102] 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: Multiple fresh food storage compartments; The preservation module (30) includes an outlet (31) for outputting preservation gas, a preservation chamber (10) connected to the outlet (31), the preservation chamber (10) being in airflow communication with another preservation chamber (20), and the concentration of preservation gas in the other preservation chamber (20) changing with the concentration of preservation gas in the first preservation chamber (10).

2. The refrigeration equipment according to claim 1, characterized in that, One of the preservation chambers (10) is connected in series with the other preservation chamber (20) for airflow communication. The airflow output from the preservation module (30) passes through the one preservation chamber (10) and then reaches the other preservation chamber (20).

3. The refrigeration equipment according to claim 2, characterized in that, The preservation gas output by the preservation module (30) is used to adjust the gas concentration, including oxygen concentration, carbon dioxide concentration, water vapor concentration, nitrogen concentration, oxygen concentration and water vapor concentration, or carbon dioxide concentration and water vapor concentration.

4. The refrigeration equipment according to claim 3, characterized in that, The preservation module (30) adjusts the gas concentration in one of the preservation chambers (10) to be lower than the concentration of the corresponding component in the outside.

5. The refrigeration equipment according to claim 4, characterized in that, One of the preservation chambers (10) includes a first air inlet (11), a first return air inlet (12) and a first air outlet (13). The preservation module (30) includes a return air inlet (32). The other preservation chamber (20) includes a second air inlet (21). The air outlet (31) is connected to the first air inlet (11). The first return air inlet (12) is connected to the return air inlet (32). The first air outlet (13) is connected to the second air inlet (21).

6. The refrigeration equipment according to claim 5, characterized in that, The other preservation room (20) also includes a second return air vent (22), which is connected to the return air vent (32).

7. The refrigeration equipment according to claim 5 or 6, characterized in that, The refrigeration equipment further includes a fluid drive (40) that drives the airflow in one of the preservation compartments (10) to blow towards the other preservation compartment (20).

8. The refrigeration equipment according to claim 7, characterized in that, The fluid drive (40) controls the airflow rate so that the gas concentration in the other preservation chamber (20) is lower than the concentration of the corresponding component in the outside and higher than the concentration of the corresponding component in the first preservation chamber (10); The fluid drive component (40) is configured as a fan or air pump.

9. The refrigeration equipment according to claim 5, characterized in that, One of the preservation chambers (10) further includes a third air inlet (14), and the other preservation chamber (20) further includes a second air outlet (23), which is connected to the third air inlet (14).

10. The refrigeration equipment according to claim 4, characterized in that, One of the preservation chambers (10) includes a first air inlet (11) and a first air outlet (13), the preservation module (30) includes a return air outlet (32), the other preservation chamber (20) includes a second air inlet (21) and a second return air outlet (22), the air outlet (31) is connected to the first air inlet (11), the first air outlet (13) is connected to the second air inlet (21), and the second return air outlet (22) is connected to the return air outlet (32).

11. The refrigeration equipment according to claim 5 or 10, characterized in that, The concentration of the gas adjusted by the preservation gas is the oxygen concentration; The other fresh-keeping compartment (20) is provided with a first drawer (24) with the opening facing upward. The other fresh-keeping compartment (20) is located below the first fresh-keeping compartment (10). The opening of the first air outlet (13) is downward, and the opening of the second air inlet (21) is upward. The gas flowing into the second air inlet (21) enters the opening downward.

12. The refrigeration equipment according to claim 3, characterized in that, The preservation module (30) adjusts the gas concentration in one of its preservation chambers (10) to be higher than the concentration of the corresponding component in the outside.

13. The refrigeration equipment according to claim 12, characterized in that, One of the preservation chambers (10) includes a first air inlet (11) and a first air outlet (13), and the other preservation chamber (20) includes a second air inlet (21). The air outlet (31) is connected to the first air inlet (11), and the first air outlet (13) is connected to the second air inlet (21).

14. The refrigeration equipment according to claim 12, characterized in that, The preservation module (30) is housed in one of the preservation chambers (10). The preservation module (30) also includes an air inlet (33) and an exhaust outlet (34). The one preservation chamber (10) includes a first air outlet (13). The other preservation chamber (20) includes a second air inlet (21). The exhaust outlet (31) discharges preservation gas into the one of the preservation chambers (10). The air inlet (33) and the exhaust outlet (34) are connected to the outside gas. The first air outlet (13) is connected to the second air inlet (21).

15. The refrigeration equipment according to claim 2, characterized in that, Another of the multiple fresh-keeping compartments (60) is connected to the air outlet (31); or, The further preservation compartment (60) of the plurality of preservation compartments is connected in series with the airflow of the other preservation compartment (10) or the other preservation compartment (20).

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