Refrigeration device and control method therefor

Abstract

Disclosed in the present application are a refrigeration device and a control method therefor. The refrigeration device comprises a fresh-keeping compartment, a cooling air supply duct, an oxygen regulation module and a moisture-permeation module, wherein the cooling air supply duct is in communication with a refrigeration system and supplies cold air to the exterior of the fresh-keeping compartment; the oxygen regulation module is used for adjusting the oxygen concentration in the fresh-keeping compartment; and a humidity difference between the fresh-keeping compartment and the exterior thereof is regulated by means of the moisture-permeation module. The refrigeration device enables precise regulation of oxygen concentration, humidity and temperature. The oxygen regulation module of the refrigeration device ensures the maintenance of a low-oxygen or high-oxygen environment, and the moisture-permeation module regulates a humidity difference, which can not only maintain a relatively high humidity in the fresh-keeping compartment to maintain the moisture of food materials, but also prevent condensation or frost formation, such that the food materials can be stored in an environment with a suitable oxygen concentration, temperature and humidity, thus significantly improving the fresh-keeping effect.

Description

Refrigeration equipment and its control methods

[0001] This application is based on and claims priority to Chinese patent applications with application numbers 202411595483.4, 202422723060.8, 202411595496.1, 202411595948.6, 202411595509.5, and 202411595717.5, filed on November 8, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0002] This application relates to the field of cold storage and preservation technology, and in particular to a refrigeration device and a control method for the refrigeration device. Background Technology

[0003] On the one hand, as modern families increasingly demand food preservation, users are placing higher requirements 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 air blowing to preserve food, and such preservation methods may not necessarily be the most ideal way to keep food fresh for a long time.

[0004] For example, on the one hand, existing refrigeration equipment typically uses a single temperature control method, directly cooling the storage space through the refrigeration system to meet the preservation needs of food. However, because food itself releases moisture during storage, this moisture easily forms frost or condensation on various walls of the refrigerator in a low-temperature environment, leading to a deterioration in user experience. On the other hand, if the humidity and temperature controls in the crisper compartment are not properly coordinated, the internal temperature may become too high or too low when humidity is adjusted. This can range from affecting the preservation effect to causing food to freeze or spoil. Therefore, properly controlling the humidity in the crisper compartment and coordinating humidity and temperature controls will negatively impact the user experience if these issues are not properly addressed.

[0005] For example, when preserving certain ingredients, it's not enough to simply lower their temperature; the oxygen content of their environment can also be adjusted. Some fruits and vegetables maintain their freshness better in low-oxygen environments, as this effectively inhibits respiration and slows down decay, thus improving the preservation quality of fruits. Conversely, high-oxygen environments are beneficial for preserving the quality of meats.

[0006] However, there may be some issues between oxygen regulation and refrigeration in the refrigeration equipment. Since the oxygen regulation chamber needs to be relatively isolated from other environments within the refrigeration equipment to form a relatively sealed space, the temperature within this space is affected by both indirect refrigeration from the cold air outside the space and the temperature of the oxygen regulation gas itself. If these two cold sources are not properly coordinated, the internal temperature of the space may become too high or too low during use. Furthermore, the internal temperature cannot be independently and precisely controlled during oxygen regulation, or other areas within the refrigeration equipment may become too cold in order to refrigerate the oxygen regulation chamber. These situations can range from affecting the overall preservation effect to causing food to freeze or spoil, all of which will impact the user experience.

[0007] Any prior art mentioned in the specification does not imply confirmation or suggestion that such prior art constitutes part of the general common knowledge in any jurisdiction, or that it can be reasonably expected that such prior art will be understood, regarded as relevant and / or combined with other prior art by a person skilled in the art.

[0008] Application content

[0009] The purpose of this application is to provide a refrigeration device that effectively regulates humidity and has a good cooling effect.

[0010] To achieve the above-mentioned objectives, one embodiment of this application provides a refrigeration device, comprising:

[0011] The cylindrical body has an internal cavity with an opening at the front end and an air outlet at the rear.

[0012] A cooling air supply path, wherein the cooling air supply path is connected to the air outlet;

[0013] 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;

[0014] A cover plate is disposed in the cavity, and the cover plate closes the opening located below it to enclose the fresh-keeping compartment with the drawer. A cold air cavity is formed between the cover plate and the top wall of the cylinder. The cover plate includes a moisture-permeable module. The humidity difference between the fresh-keeping compartment and the cold air cavity is adjusted by the moisture-permeable module. 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.

[0015] As a further improvement of this application, the cover plate also includes a cover body, on which a groove is provided, and the moisture-permeable module is accommodated in the groove.

[0016] As a further improvement of this application, the cover body is provided with multiple air guide plates, which guide the cold air to cover the moisture-permeable module in multiple directions.

[0017] As a further improvement of this application, 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.

[0018] As a further improvement of this application, the plurality of air guide plates include a left air guide plate, a right air guide plate and a plurality of intermediate 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 top wall;

[0019] 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.

[0020] As a further improvement of this application, the refrigeration device further includes a temperature sensor, which is disposed on the side of the cover plate facing the top wall and outside the cold air cavity.

[0021] As a further improvement of this application, 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.

[0022] As a further improvement of this application, the rear end of the moisture-permeable module is adjacent 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.

[0023] As a further improvement of this application, 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 bottom wall of the cylinder. 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 before being blown toward the return air vent.

[0024] As a further improvement of this application, the refrigeration equipment further includes a cold storage compartment, wherein the airflow in the cold storage compartment is blown toward the return air outlet through the interlayer air passage and the return air cavity;

[0025] The refrigerated compartment is located above the fresh-keeping compartment, and the air outlet is located above the return air outlet.

[0026] As a further improvement to this application, the moisture-permeable module is configured as a salt solution, a solid adsorbent, a washing gel, or an electrolytic dehumidification module.

[0027] As a further improvement of this application, the refrigeration device further includes a humidity sensor, which is disposed on the side of the cover facing the drawer;

[0028] 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.

[0029] As a further improvement of this application, the drawer is supplied with oxygen-regulating gas, which makes the oxygen concentration inside the drawer different from the oxygen concentration outside.

[0030] As a further improvement of this application, the refrigeration device further includes a first sealing ring and a second sealing ring, the first sealing ring encircling the opening and abutting between the cylinder and the drawer; the drawer includes an upper abutting edge encircling the opening, and the second sealing ring encircling the opening and abutting between the cover plate and the upper abutting edge.

[0031] As a further improvement of this application, the cylinder includes a plurality of hooks, and the cover plate includes hooks corresponding to the hooks, the hooks being hung on the hooks to fix the cover plate relative to the cylinder.

[0032] Compared with the prior art, this application 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 passes through the moisture-permeable module and is carried away by the airflow, 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 the surface that the cold air blows over. 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 cool while carrying away moisture, 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.

[0033] The purpose of this application is to provide a refrigeration device that can accurately regulate the storage environment of food ingredients from multiple dimensions such as temperature, humidity, and oxygen content.

[0034] To achieve the above-mentioned objectives, one embodiment of this application provides a refrigeration device, comprising:

[0035] Fresh food storage room;

[0036] A cooling air supply path is provided, which is connected to the refrigeration system and supplies cold air to the outside of the fresh food compartment.

[0037] An oxygen control module is used to adjust the oxygen concentration inside the preservation room.

[0038] The moisture permeability module regulates the humidity difference between the fresh food compartment and the outside.

[0039] As a further improvement of this application, a groove is provided on the top wall of the preservation chamber, the moisture permeation module is housed in the groove, and the cold air from the cold air supply path blows across the upper surface of the moisture permeation module.

[0040] As a further improvement of this application, the cooling air supply path includes an air outlet, and a plurality of air guide plates are provided on the top wall. The plurality of air guide plates are arranged opposite to the air outlet, and the plurality of air guide plates guide the cooling air to cover multiple directions of the moisture permeable module.

[0041] As a further improvement of this application, the plurality of air guide plates include a left air guide plate, a right air guide plate and several intermediate air guide plates. A left air path is formed between the left air guide plate and one of the intermediate air guide plates, and a right air path is formed between the right air guide plate and one of the intermediate air guide plates. The air volume of the left air path and the right air path is basically the same.

[0042] As a further improvement of this application, the middle air guide plate extends in the front-to-back direction, the distance between the left air guide plate and the middle air guide plate gradually increases in the direction of airflow, and the distance between the right air guide plate and the middle air guide plate gradually increases in the direction of airflow.

[0043] As a further improvement of this application, the refrigeration equipment also includes a temperature sensor, which is disposed on the outer side of the top wall, and the left or right air guide plate separates the temperature sensor from the cold air in the cooling air supply path.

[0044] As a further improvement of this application, a side air outlet is provided at the end of the left air guide plate and / or the right air guide plate away from the air outlet, an air guide wall is provided on the side wall of the fresh-keeping compartment, a return air cavity is provided below the fresh-keeping compartment, and the cold air supply path includes a return air inlet. The cold air blown out from the side air outlet passes through the air guide wall and the return air cavity in sequence and is blown to the return air inlet.

[0045] As a further improvement of this application, the refrigeration device further includes a cylinder and a drawer disposed within the cylinder. The cylinder includes a forward opening, and the drawer has an upward opening. When the drawer is located within the cylinder, the drawer and the door frame of the cylinder are sealed and abutted by a first sealing ring.

[0046] As a further improvement of this application, the cylinder includes an air outlet and a first air return port, the drawer includes a second air inlet and a second air return port, the oxygen regulating module supplies air to the air outlet, and the air returns to the oxygen regulating module after passing through the second air inlet, the second air return port and the first air return port in sequence.

[0047] As a further improvement of this application, the oxygen regulation module includes an air outlet and a third air return port, both of which face the bottom wall of the cylinder.

[0048] The rear wall of the cylinder is provided with an oxygen regulating passage, which includes an air groove, a third sealing ring and a back plate disposed on the rear wall. The back plate abuts against the third sealing ring with the rear wall. One end of the air groove extends to the air outlet and the other end extends to the air outlet in the middle of the rear wall.

[0049] As a further improvement of this application, the first air return port is provided on the bottom wall of the cylinder, and multiple second air return ports are provided, respectively located on the side and bottom of the drawer.

[0050] As a further improvement of this application, the moisture-permeable module is disposed on the rear wall of the drawer.

[0051] As a further improvement of this application, the oxygen regulating module is used to increase the oxygen concentration inside the preservation room to a level higher than the oxygen concentration outside.

[0052] As a further improvement of this application, the oxygen adjustment module is used to lower the oxygen concentration inside the preservation room to a level lower than the outside oxygen concentration.

[0053] As a further improvement to this application, the moisture-permeable module is configured as a salt solution, a solid adsorbent, a washing gel, or an electrolytic dehumidification module.

[0054] Compared with commonly used technologies, this application has the following beneficial effects: The refrigeration equipment can achieve precise regulation of oxygen concentration, humidity and temperature. Its oxygen regulation module ensures the maintenance of low-oxygen or high-oxygen environments, such as using low oxygen to inhibit the respiration of food and extend the shelf life; the humidity permeation module regulates humidity differences, which can maintain a relatively high humidity in the fresh-keeping room to keep the food moist, and also avoid condensation or frost; the cold air supply circuit supplies cold air to the outside of the fresh-keeping room, which can ensure uniform distribution of cold air and maintain the relative sealing of the fresh-keeping room, preventing the cold air from affecting the oxygen content or humidity in the fresh-keeping room. At the same time, it takes into account the control of oxygen regulation, humidity and temperature, so that food can be stored in an environment with suitable oxygen concentration, suitable temperature and suitable humidity, maximizing its nutrition and freshness, greatly improving the preservation effect and significantly improving the user experience.

[0055] The purpose of this application is to provide a refrigeration device and its oxygen regulation method that can ensure the preservation of food in a suitable oxygen concentration and temperature environment.

[0056] To achieve the above-mentioned objectives, one embodiment of this application provides a refrigeration device.

[0057] A humidity sensor is used to continuously monitor the temperature of the fresh food compartment and the temperature of the refrigeration compartment during the operation of the oxygen regulation module. The oxygen regulation module is used to adjust the oxygen concentration in the fresh food compartment. The cooling assembly is used to supply the cooling capacity generated by the refrigeration system to the outside of the fresh food compartment and the refrigeration compartment. The cooling assembly cools the fresh food compartment in the first operating state.

[0058] The processing module is used to control the refrigeration system to shut down and switch the cooling component to the first operating state when the temperature of the refrigeration chamber is lower than the high temperature threshold for refrigeration and the temperature of the preservation chamber is higher than the oxygen regulation temperature threshold.

[0059] To achieve one of the above-mentioned objectives, one embodiment of this application provides an oxygen regulation method for a refrigeration device, comprising the following steps:

[0060] During the operation of the oxygen control module, the temperatures of the fresh food compartment and the refrigeration compartment are continuously monitored.

[0061] The oxygen regulating module is used to regulate the oxygen concentration in the fresh food storage room. The cooling air supply assembly is used to supply the cooling capacity generated by the refrigeration system to both the outside of the fresh food storage room and the refrigeration room. The cooling assembly cools the fresh food storage room in the first operating state. An openable and closable damper is provided between the fresh food storage room and the cooling air supply assembly. A fan is provided inside the cooling air supply assembly.

[0062] When the temperature of the refrigeration chamber is lower than the high-temperature threshold for refrigeration and the temperature of the preservation chamber is higher than the oxygen-regulating temperature threshold, the refrigeration system stops and the cooling component switches to the first operating state.

[0063] As a further improvement to this application, the following steps are also included:

[0064] When the downtime of the oxygen regulation module exceeds the downtime cycle time, the oxygen regulation module is switched to working state.

[0065] As a further improvement to this application, the method also includes the step of: when the downtime of the oxygen regulation module is greater than the downtime cycle time, checking whether the refrigeration system is in a downtime state.

[0066] If the refrigeration system is in a shutdown state, switch the oxygen regulation module to the working state;

[0067] If the refrigeration system is not in a shutdown state, the oxygen regulation module will be switched to the working state after the refrigeration system is shut down.

[0068] As a further improvement of this application, the oxygen regulation module is used to adjust the oxygen concentration in the preservation chamber so that the oxygen concentration in the preservation chamber is lower than the oxygen concentration in the outside.

[0069] As a further improvement to this application, the following steps are also included:

[0070] During the operation of the oxygen regulation module, if the working time of the oxygen regulation module is longer than the working cycle time, the oxygen regulation module will be switched to a shutdown state.

[0071] As a further improvement to this application, the following steps are also included:

[0072] When the temperature of the refrigeration chamber is higher than the high temperature threshold for refrigeration and the temperature of the preservation chamber is higher than the oxygen regulation temperature threshold, the refrigeration system is started and the cooling components are switched to the first operating state.

[0073] As a further improvement of this application, the cooling assembly includes a cooling air passage, a first fan and a first damper. In the first operating state, the first fan is running and the first damper is open, and the cooling air supplied by the cooling air passage to the fresh food compartment flows only outside the fresh food compartment.

[0074] The oxygen regulation method also includes the following steps:

[0075] When the temperature of the refrigeration chamber is lower than the high-temperature threshold for refrigeration and the temperature of the preservation chamber is lower than the oxygen-regulating temperature threshold, the refrigeration system shuts down, the first fan stops, and the first damper closes.

[0076] As a further improvement of this application, the refrigeration device includes a drawer, the fresh-keeping compartment is formed inside the drawer, and a moisture-permeable module is provided above the opening of the drawer to adjust the humidity difference between the fresh-keeping compartment and the refrigeration compartment.

[0077] To achieve one of the above-mentioned objectives, one embodiment of this application provides a refrigeration device, comprising:

[0078] The cooling component air circuit includes a cooling air circuit, a first fan and a first damper. When the cooling component is in the first operating state, it cools the fresh food compartment.

[0079] Fresh food storage room;

[0080] The refrigeration room and the preservation room are both connected to the cold air supply circuit for refrigeration.

[0081] An oxygen control module is used to adjust the oxygen concentration in the preservation compartment.

[0082] Storage module, used to store computer programs;

[0083] The processing module, when executing the computer program, can implement the steps in the oxygen regulation method of the refrigeration equipment described above.

[0084] To achieve one of the above-mentioned objectives, one embodiment of this application provides a readable storage medium storing a computer program that, when executed by a processing module, can implement the steps in the oxygen regulation method of the refrigeration equipment described above.

[0085] Compared with the prior art, this application has the following beneficial effects: The oxygen regulation method of the refrigeration equipment can achieve precise cooling of the fresh-keeping room by utilizing the existing cooling capacity without further cooling of the refrigeration room. This can avoid the risk of excessively low temperatures in the refrigeration room and the fresh-keeping room, while effectively reducing the temperature of the fresh-keeping room. This ensures that the food is kept fresh in a suitable low-oxygen and suitable-temperature environment, improves the refrigeration efficiency of the equipment, enhances the intelligence level of the refrigeration equipment, and ensures that the temperature is controlled within a suitable range while maintaining a suitable oxygen concentration.

[0086] The purpose of this application is to provide a refrigeration device and a method thereof that can effectively regulate humidity and avoid excessively low temperatures.

[0087] To achieve the above-mentioned objectives, one embodiment of this application provides a refrigeration device, comprising:

[0088] A humidity sensor is used to continuously monitor the humidity of the fresh food compartment. The humidity difference between the fresh food compartment and the refrigeration compartment is adjusted by a moisture permeation module. When the cooling component is in the first operating state, cold air from the refrigeration system is blown through the moisture permeation module.

[0089] The processing module is used to determine whether the temperature of the fresh-keeping room is lower than the fresh-keeping temperature threshold when the humidity of the fresh-keeping room is greater than the first humidity threshold; if the temperature of the fresh-keeping room is lower than the fresh-keeping temperature threshold, the cooling component switches to the first operating state after the refrigeration system is shut down and a preset time has elapsed.

[0090] To achieve one of the above-mentioned objectives, one embodiment of this application provides a humidity control method for a refrigeration device, comprising the following steps:

[0091] The humidity of the fresh food storage compartment is continuously monitored. The humidity difference between the fresh food storage compartment and the refrigeration compartment is adjusted by the moisture permeation module. When the cooling component is in the first operating state, the cold air from the refrigeration system is blown through the moisture permeation module.

[0092] When the humidity of the fresh food storage room is greater than the first humidity threshold, it is determined whether the temperature of the fresh food storage room is lower than the fresh food temperature threshold.

[0093] If the temperature of the preservation chamber is lower than the preservation temperature threshold, after the refrigeration system is shut down and a preset time has elapsed, the cooling component switches to the first operating state.

[0094] As a further improvement to this application, the following steps are also included:

[0095] If the temperature of the fresh-keeping compartment is not lower than the fresh-keeping temperature threshold, determine whether the temperature of the refrigeration compartment is higher than the refrigeration high-temperature threshold.

[0096] If the temperature of the cooling room is higher than the high temperature threshold for cooling, the refrigeration system will operate and the cooling component will switch to the first operating state.

[0097] If the temperature of the refrigeration chamber is not higher than the high temperature threshold for refrigeration, the refrigeration system maintains its current state, and the cooling component switches to the first operating state.

[0098] As a further improvement to this application, the cooling assembly includes a cooling air passage, a first fan, and a first damper;

[0099] In the first operating state, the first fan is running, the first damper is open, and the cold air supplied by the cooling air path blows through the moisture permeation module only flows outside the fresh food storage room.

[0100] As a further improvement to this application, the following steps are also included:

[0101] When the humidity in the preservation room is less than the second humidity threshold, the first damper is closed, wherein the second humidity threshold is less than the first humidity threshold.

[0102] As a further improvement to this application, the step of switching the cooling component to the first operating state after the refrigeration system has stopped and a preset time has elapsed includes:

[0103] If the refrigeration system is currently in operation, the first damper is closed. After the refrigeration system stops and a first preset time has elapsed, the first damper opens and the first fan starts running.

[0104] As a further improvement to this application, the step of switching the cooling component to the first operating state after the refrigeration system has stopped and a preset time has elapsed includes:

[0105] If the refrigeration system is currently in a shutdown state, the first damper is closed. After the refrigeration system has been shut down for a second preset time, the first damper is opened and the first fan starts running.

[0106] As a further improvement to this application, the second preset time is the difference between the downtime cycle time and the downtime.

[0107] As a further improvement of this application, the refrigeration device includes a drawer, and a moisture-permeable module is provided above the opening of the drawer. When the first damper is opened and the first fan is running, cold air blows across the surface of the moisture-permeable module.

[0108] As a further improvement of this application, the fresh-keeping room is supplied with oxygen-regulating gas, which makes the oxygen concentration inside the fresh-keeping room different from the oxygen concentration outside.

[0109] To achieve one of the above-mentioned objectives, one embodiment of this application provides a readable storage medium storing a computer program that, when executed by a processing module, can implement the steps in the humidity adjustment method of the refrigeration device described above.

[0110] Compared with the prior art, this application has the following beneficial effects: When the refrigeration equipment adjusts the humidity, if the temperature of the fresh food compartment is detected to be lower than the preset temperature threshold, the time for the fresh food compartment to start adjusting the humidity is delayed. After the refrigeration system stops and the preset time has elapsed, the fan is turned on to adjust the humidity. In this way, the temperature in the fresh food compartment will not drop excessively while the humidity is being adjusted, which can effectively avoid the food from freezing due to excessively low temperature, avoid the negative impact of excessively low temperature on the food, maintain a suitable humidity environment in the fresh food compartment, and improve the storage quality and freshness period of the food.

[0111] The purpose of this application is to provide a refrigeration equipment control method and a refrigeration equipment that selectively uses direct or indirect methods to cool the fresh food storage room based on the temperature rise of the fresh food storage room.

[0112] To achieve the above objectives, this application provides a control method for a refrigeration device, the refrigeration device including a refrigeration compartment and a preservation compartment located within the refrigeration compartment, the control method comprising the following steps:

[0113] Obtain the temperature rise rate inside the fresh food storage room;

[0114] Determine whether the heating rate has reached the heating threshold;

[0115] If so, then at least a cooling airflow should be supplied to the refrigeration room;

[0116] Otherwise, cool airflow is supplied to the periphery of the cold storage compartment;

[0117] When a cooling airflow is delivered into the preservation room, the air inside the preservation room can flow outward.

[0118] As a further improvement of this application, after determining that the heating rate has reached the heating threshold, it is then determined whether the cooling room is in a cooling state.

[0119] If so, then at least a cooling airflow will be supplied to the fresh food storage room until the temperature inside the fresh food storage room reaches the preset value;

[0120] If not, then determine whether the temperature of the cooling room has reached the cooling temperature;

[0121] If the cooling temperature is reached, the cooling chamber is cooled with the first cooling intensity, and cooling airflow is delivered to the fresh food storage chamber until the temperature in the fresh food storage chamber reaches the preset value.

[0122] If the cooling temperature is not reached, the cooling chamber is cooled with a second cooling intensity, and cooling airflow is delivered to the fresh food storage chamber until the temperature in the fresh food storage chamber reaches a preset value, wherein the second cooling intensity is lower than the first cooling intensity.

[0123] As a further improvement of this application, after determining that the heating rate has not reached the heating threshold, it is then determined whether the cooling room is in a cooling state.

[0124] If so, then cool airflow is supplied to the periphery of the fresh food storage room until the temperature inside the fresh food storage room reaches the preset value;

[0125] If not, then determine whether the temperature of the cooling room has reached the cooling temperature;

[0126] If the cooling temperature is reached, the cooling chamber is cooled with the third cooling intensity, and cooling airflow is delivered to the outside of the fresh food room until the temperature inside the fresh food room reaches the preset value.

[0127] If the cooling temperature is not reached, the cooling chamber is cooled with the fourth cooling intensity, and cooling airflow is delivered to the periphery of the fresh food storage room until the temperature inside the fresh food storage room reaches the preset value. The fourth cooling intensity is lower than the third cooling intensity.

[0128] As a further improvement to this application, the refrigeration equipment further includes an oxygen regulation module, and the control method further includes the following steps:

[0129] Once the temperature inside the preservation room reaches a preset value, the oxygen regulation module adjusts the oxygen concentration inside the preservation room.

[0130] As a further improvement of this application, if the heating rate reaches the heating threshold, while delivering cooling airflow into the fresh-keeping room, cooling airflow is also delivered to the periphery of the fresh-keeping room.

[0131] As a further improvement to this application, the above-mentioned "obtaining the heating rate inside the preservation room" includes the step of: after the preservation room is opened, determining whether the preservation room is closed;

[0132] If so, proceed to step "obtain the heating rate inside the preservation room".

[0133] This application also provides another method for controlling a refrigeration device, the refrigeration device including a refrigeration compartment and a preservation compartment located within the refrigeration compartment, the control method comprising the following steps:

[0134] Obtain the preservation temperature inside the preservation room;

[0135] Determine whether the preservation temperature has reached the temperature threshold;

[0136] If so, then at least a cooling airflow should be supplied to the refrigeration room;

[0137] Otherwise, cool airflow is supplied to the periphery of the cold storage compartment;

[0138] When a cooling airflow is delivered into the preservation room, the air inside the preservation room can flow outward.

[0139] This application also provides a refrigeration device, including:

[0140] Refrigeration room;

[0141] The fresh food storage room is located inside the refrigeration room, and an external air passage is formed around the fresh food storage room;

[0142] Refrigeration components;

[0143] A cooling air supply circuit is provided, the refrigeration component is located in the cooling air supply circuit, a third air damper that can be opened and closed is provided between the fresh-keeping compartment and the cooling air supply circuit, a first air damper that can be opened and closed is provided between the peripheral air circuit and the cooling air supply circuit, and the cooling air supply circuit is also connected to the refrigeration compartment.

[0144] Storage module, used to store computer programs;

[0145] The processing module executes the computer program to implement the steps in the refrigeration equipment control method.

[0146] As a further improvement of this application, the refrigeration equipment includes a cylinder, a box, and a door panel. The cylinder has a first opening that faces forward, and the box has an opening that faces upward. The box is located inside the cylinder, and the door panel is connected to the box and used to open and close the first opening. The fresh-keeping compartment is formed by the cylinder and the door panel.

[0147] As a further improvement of this application, the cooling air supply path includes an air outlet and a return air inlet that connect to the peripheral air path. Both the air outlet and the return air inlet are located on the rear side of the cylinder. The cylinder has guide plates formed on it to allow the cooling airflow from the air outlet to flow through different sides of the cylinder.

[0148] As a further improvement of this application, the refrigeration equipment includes a cylinder, a box, and a door panel. The cylinder has a first opening that faces forward, and the box has an opening that faces upward. The box is located inside the cylinder, and the door panel is connected to the box and used to open and close the first opening. The refrigeration chamber is formed by the cylinder and the door panel. The refrigeration equipment also includes a cover for closing the opening, and the preservation chamber is formed by the box and the cover.

[0149] Compared with the prior art, the beneficial effects of one embodiment of this application are as follows: the refrigeration equipment control method and refrigeration equipment provided by this application can select whether to directly deliver refrigeration airflow into the refrigeration room or deliver refrigeration airflow to the outside of the refrigeration room according to the temperature rise in the refrigeration room. In this way, the food in the refrigeration room can be prevented from freezing and the refrigeration effect of the refrigeration room can be guaranteed.

[0150] The purpose of this application is to provide a refrigeration device and a method for controlling the temperature of the refrigeration device's preservation atmosphere.

[0151] To achieve one of the aforementioned objectives, one embodiment of this application provides a refrigeration device, comprising:

[0152] Fresh food storage room;

[0153] The cooling system includes a refrigerator for cooling the fresh food compartment and an air duct connecting the fresh food compartment.

[0154] An oxygen regulation module is used to regulate the oxygen concentration in the fresh food storage compartment. The oxygen regulation module also includes an oxygen regulation path that connects to the fresh food storage compartment.

[0155] A controller, a method for controlling the temperature of a refrigeration device to achieve a preservation atmosphere, the method comprising the following steps:

[0156] During the operation of the oxygen control module, the temperature To of the oxygen-controlled gas in the oxygen control path and the temperature Tr of the preservation atmosphere in the preservation compartment are continuously monitored. When the difference between To or Tr and the initial temperature value at the start of the oxygen control module exceeds a preset threshold, and Tr≥Tr(min)+n℃ when the refrigerator does not cool the preservation compartment, the cold air prepared by the refrigerator is transported to the preservation compartment through the air path, and the cold air flows through the outer wall of the oxygen control path to exchange heat with the oxygen-controlled gas in the oxygen control path.

[0157] One embodiment of this application provides a method for controlling the temperature of the preservation atmosphere in a refrigeration device, comprising the following steps:

[0158] When the oxygen-regulating module is running to prepare oxygen-regulating gas, the temperature To of the oxygen-regulating gas in the gas path between the oxygen-regulating module and the fresh-keeping compartment, and the temperature Tr of the fresh-keeping atmosphere in the fresh-keeping compartment are monitored.

[0159] When the difference between To or Tr and the initial temperature value at the start of the oxygen control module exceeds the preset threshold Ty, it is determined whether the cooler is running.

[0160] If yes, then determine whether the refrigerator is cooling the fresh food compartment. If not, then compare Tr with the preset minimum temperature Tr(min) of the fresh food compartment. If Tr≥Tr(min)+n℃, then control the cold air prepared by the refrigerator to be transported to the fresh food compartment through the air duct, and the cold air flows through the outer wall of the oxygen regulating duct to exchange heat with the oxygen regulating gas in the oxygen regulating duct.

[0161] As a further improvement of one embodiment of this application, controlled oxygen gas is introduced into a drawer located inside the fresh food storage compartment, and controlled cold air is introduced into the fresh food storage compartment outside the drawer.

[0162] As a further improvement of one embodiment of this application, when the temperature To of the oxygen conditioning gas in the oxygen conditioning circuit is being monitored;

[0163] If the refrigerator is not cooling, check if Tr(min)≤Tr≤Tr(min)+n℃ is true. If so, control the fan to blow the residual cold from the refrigerator to the fresh food compartment at a preset duty cycle.

[0164] As a further improvement of one embodiment of this application, the preset duty cycle is 50-75%, and within the range of Tr(min) to Tr(min)+n℃, the higher Tr is, the higher the duty cycle is.

[0165] As a further improvement of one embodiment of this application, the cooler is a first evaporator;

[0166] If Tr > Tr(min) + n℃, then determine whether the compressor has started. If the compressor has not started, then immediately start the compressor to make the first evaporator cool to supply cooling for the fresh food compartment. If the compressor has started, then immediately control the first evaporator to cool to supply cooling for the fresh food compartment after the second evaporator, which is cooling for the freezer compartment, has finished cooling.

[0167] As a further improvement to one embodiment of this application, Ty ≥ 3°C.

[0168] As a further improvement to one embodiment of this application, when the temperature Tr of the preservation atmosphere is monitored;

[0169] If the refrigerator is not cooling, determine whether the temperature Tr of the refrigerated compartment with the fresh-keeping compartment meets the preset minimum temperature Tr(min)≤Tr<Tr<Preset minimum temperature Tr(min)+m℃ of the refrigerated compartment. If so, control the fan to blow the residual cold from the refrigerator to the fresh-keeping compartment with a preset duty cycle.

[0170] As a further improvement of one embodiment of this application, the cooler is a first evaporator;

[0171] If Tr≥Tr(min)+m℃, then determine whether the compressor has started. If the compressor has not started, then immediately start the compressor to make the first evaporator cool to supply cooling for the fresh food compartment. If the compressor has started, then immediately control the first evaporator to cool to supply cooling for the fresh food compartment after the second evaporator, which is cooling for the freezer compartment, has finished cooling.

[0172] As a further improvement to one embodiment of this application, Ty ≥ 1°C.

[0173] As a further improvement of one embodiment of this application, if the refrigerator reaches the maximum cooling time, Tr≥Tr(min)+1℃, then the fan is controlled to blow the residual coolness of the refrigerator to the fresh food compartment at a duty cycle of 50%.

[0174] Compared with the prior art, this application has the following beneficial effects: when the temperature rise caused by the oxygen-controlled gas is greater than or equal to the preset threshold, when the refrigerator does not cool the fresh food compartment, the refrigerator is controlled to cool the fresh food compartment when the temperature inside the fresh food compartment is n°C above the preset minimum temperature of the fresh food compartment, thereby reducing the temperature rise inside the fresh food compartment caused by the oxygen-controlled gas.

[0175] The term “comprise” as used herein, and variations thereof such as “comprises”, “comprised”, “comprising”, “including”, and “containing”, do not exclude other features, components, elements, or steps unless the context clearly requires otherwise. Attached Figure Description

[0176] Figure 1 is a schematic diagram of the structure of a refrigeration device according to an embodiment of this application;

[0177] Figure 2 is a partial structural schematic diagram of a refrigeration device according to an embodiment of this application;

[0178] Figure 3 is an exploded view of the structure in Figure 2;

[0179] Figure 4 is a cross-sectional view of the drawer portion according to an embodiment of this application;

[0180] Figure 5 is a structural schematic diagram of a drawer and cover plate according to an embodiment of this application;

[0181] Figure 6 is a top view of a cover plate according to an embodiment of this application;

[0182] Figure 7 is a cross-sectional view of a cover plate according to an embodiment of this application;

[0183] Figure 8 is a structural schematic diagram of the preservation compartment from the rear view of an embodiment of this application;

[0184] Figure 9 is a structural schematic diagram of the preservation room from the front view according to an embodiment of this application;

[0185] Figure 10 is a structural schematic diagram of an embodiment of this application;

[0186] Figure 11 is an exploded view of a portion of the structure of a refrigeration device according to an embodiment of this application;

[0187] Figure 12 is a cross-sectional view of a partial structure of a refrigeration device according to an embodiment of this application;

[0188] Figure 13 is a frontal view structural diagram of the preservation compartment according to an embodiment of this application;

[0189] Figure 14 is an exploded view of the rear view of the fresh food compartment according to an embodiment of this application;

[0190] Figure 15 is a top view of the preservation compartment according to an embodiment of this application;

[0191] Figure 16 is a bottom view of the preservation compartment according to an embodiment of this application;

[0192] Figure 17 is a schematic diagram of the structure of a drawer according to an embodiment of this application;

[0193] Figure 18 is a flowchart of a control method for oxygen regulation of a refrigeration device according to an embodiment of this application;

[0194] Figure 19 is another flowchart of a control method for oxygen regulation of a refrigeration device according to an embodiment of this application;

[0195] Figure 20 is a flowchart of a humidity control method for a refrigeration device according to an embodiment of this application;

[0196] Figure 21 is another flowchart of a humidity control method for a refrigeration device according to an embodiment of this application;

[0197] Figure 22 is a schematic diagram of the structure of the refrigeration equipment provided in the second embodiment of this application;

[0198] Figure 23 is an enlarged schematic diagram of the middle part of Figure 22;

[0199] Figure 24 is an exploded view of a portion of the structure of the refrigeration device provided in the second embodiment of this application;

[0200] Figure 25 is another exploded view of a portion of the structure of the refrigeration equipment provided in the embodiment shown in Figure 24;

[0201] Figure 26 is an exploded view of a portion of the structure of a refrigeration device provided in another embodiment of this application;

[0202] Figure 27 is a flowchart of a refrigeration equipment control method provided in an embodiment of this application;

[0203] Figure 28 is a more detailed flowchart of the refrigeration equipment control method provided in the embodiment shown in Figure 27;

[0204] Figure 29 is a flowchart of the temperature control method for the preservation atmosphere of the refrigeration equipment in the third embodiment of this application;

[0205] Figure 30 is a flowchart of the temperature control method for the preservation atmosphere of the refrigeration equipment in the third embodiment of this application;

[0206] Figure 31 is a top view of the oxygen regulation module of the refrigeration equipment of this application;

[0207] Figure 32 is a cross-sectional view along line AA in Figure 31;

[0208] Figure 33 is a schematic diagram showing the connection of the drawer assembly, oxygen conditioning module and oxygen conditioning circuit of the refrigeration equipment in the third embodiment of this application;

[0209] Figure 34 is a schematic diagram of the cooperation between the first drawer assembly and the second drawer assembly of the refrigeration device in the third embodiment of this application;

[0210] Figure 35 is the front view of the mating diagram in Figure 34;

[0211] Figure 36 is a cross-sectional view along line BB in Figure 35;

[0212] Figure 37 is a cross-sectional view along line DD in Figure 35. Detailed Implementation

[0213] The present application 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 application, 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 this application.

[0214] 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.

[0215] [First Embodiment]

[0216] One embodiment of this application provides a refrigeration device 100 that effectively regulates humidity and has a good cooling effect.

[0217] The refrigeration equipment 100 can be a refrigerator, freezer, wine cabinet, or refrigerated cabinet. The following description takes a refrigerator as an example. The overall structure of the refrigerator is shown in Figure 1.

[0218] The refrigerator includes a refrigeration system, a refrigeration compartment 40, a fresh-keeping compartment, a cooling air supply line, a drawer 20, and a cover 30.

[0219] The refrigeration compartment 40 may include a refrigerator compartment, a freezer compartment, a variable temperature compartment, etc. The following description of the refrigeration compartment 40 outside the fresh food compartment takes the refrigerator compartment as an example.

[0220] The refrigeration system includes a compressor, condenser, capillary tube, evaporator, fan, and refrigeration piping. The evaporator can be located in the evaporator chamber, and there can be one or more evaporators. For example, in a refrigerator with separate refrigeration and freezing compartments, separate evaporators are provided for the refrigerator and freezer compartments. The cooling air supply connects the fresh food compartment and the refrigeration system, and can blow the cold air from the evaporator in the evaporator chamber into the refrigeration compartment 40.

[0221] As shown in Figures 2 and 3, the fresh food storage room is a room specifically designed for the preservation of fresh ingredients. The humidity and / or oxygen concentration in the fresh food storage room are adjustable. The refrigeration equipment 100 includes a cylinder 10 and a cavity 111 formed in the cylinder 10 and having 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.

[0222] 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 cylinder 10, the opening 210 is located above the drawer 20, and the drawer 20 is pushed and pulled in the front-back direction.

[0223] As shown in Figures 3 and 4, the cover plate 30 is disposed inside the cavity 111. When the drawer 20 is located inside 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 top wall 13 of the cylinder 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.

[0224] In the structures shown in Figures 2 to 10, the interior of drawer 20 is constructed to form a preservation compartment.

[0225] 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.

[0226] By setting up a moisture-permeable module 31 and a cover plate 30, the upper opening 210 of the drawer 20 is closed when it is inside the cylinder 10, and a cold air chamber 101 is formed between the cover plate 30 and the top wall 13 of the cylinder 10. On the one hand, the moisture-permeable module 31 can effectively regulate the humidity inside the drawer 20, so that the moisture released from the food during storage can be discharged in time, avoiding the formation of condensation or frost. On the other hand, the sealing effect of the cover plate 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 storage room.

[0227] 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.

[0228] As shown in Figures 3 and 10, 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. This ensures 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.

[0229] 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%.

[0230] As shown in Figures 5-7, 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 design allows for smoother airflow across the upper surface of the moisture-permeable module 31, as the moisture-permeable module 31 is completely fixed to the upper surface of the cover body 32 when cold air blows across the cover plate 30. 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.

[0231] 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.

[0232] Further, as shown in Figure 5, 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 top wall 13 of the cylinder 10 enclose a cold air cavity 101. A left air passage 36 is formed between the left air guide plate 33 and one of its intermediate air guide plates 34, and a right air passage 38 is formed between the right air guide plate 35 and one of its 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.

[0233] 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 excessively rapid humidity adjustment. This optimized airflow design ensures more uniform and stable temperature and humidity throughout the entire drawer 20 (i.e., the freshness compartment), further enhancing the preservation of food, making it particularly suitable for fresh meats that require precise temperature and humidity control.

[0234] As shown in Figures 5 and 6, 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.

[0235] 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.

[0236] 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.

[0237] As shown in Figures 5-7, 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 while 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 airflow arrangement, which allows it to be large within the condition of sufficient frame width. If the air outlet is not at the very end, or if the air outlet cannot extend all the way to the front end, and the airflow 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.

[0238] 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.

[0239] As shown in Figures 3 and 5, the refrigeration device 100 also includes a temperature sensor 80. The temperature sensor 80 is located on the side of the cover plate 30 facing the top wall 13 and is positioned outside 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 placement 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.

[0240] 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.

[0241] As shown in Figures 3, 8, and 9, the cylinder 10 of this embodiment includes an air outlet 11 that directs air towards the cavity 111. The refrigeration system includes an evaporator, and the cooling air supply path includes an air duct that blows the cold air from the evaporator towards the air outlet 11. The air outlet 11 directs air towards 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 cavity 111 more evenly and efficiently.

[0242] Additionally, as shown in Figures 8 and 9, the cylindrical body 10 includes a return air inlet 12 facing the return air to the cavity 111. A return air cavity 103 is formed between the first bottom plate 23 of the drawer 20 and the bottom wall 14 of the cylindrical body 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 drawer 20, but also achieve efficient circulation of cold air through the design of the return air cavity 103.

[0243] 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.

[0244] Furthermore, as shown in Figure 1, the refrigeration equipment 100 also includes a cold storage compartment. Airflow within the cold storage compartment passes through the interlayer air duct 102 and the return air chamber 103, then flows towards the return air vent 12. The cold storage compartment is located above the fresh-keeping compartment, and the air outlet 11 is located above the return air vent 12. In other words, the cold storage compartment and the fresh-keeping compartment each have their own air outlet ducts, while sharing 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 meets the requirements, the damper at the air outlet 11 of the fresh-keeping compartment can be closed, while the return air from the cold storage compartment simultaneously maintains the lower temperature of the fresh-keeping compartment, thereby improving the overall refrigeration efficiency.

[0245] 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.

[0246] 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.

[0247] The drawer 20 is supplied with oxygen-controlled gas, which maintains a different oxygen concentration inside the drawer 20 (i.e., the freshness compartment) compared to the outside environment, thus achieving better preservation. For example, depending on the different characteristics of various ingredients—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 ingredients such as fresh meat and fruit, further extending their shelf life and quality.

[0248] The oxygen-controlled gas is supplied by an oxygen-controlled 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.

[0249] 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.

[0250] 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.

[0251] 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.

[0252] 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.

[0253] This allows you to adjust the oxygen concentration as needed and choose a suitable oxygen-deficient or oxygen-enriched preservation atmosphere.

[0254] As shown in Figure 3, 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 cylinder 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 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 cylinder 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 preservation effect inside the drawer 20.

[0255] As shown in Figures 6 and 9, the cylinder 10 includes multiple 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 to the cylinder 10. This ensures that 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, improving the ease of use of the equipment.

[0256] The moisture-permeable module 31 can be configured as a salt solution, a solid adsorbent, a washing gel, or an electrolytic dehumidification module. The diverse humidity control methods can be flexibly selected according to needs to meet the preservation requirements of different users for different ingredients.

[0257] The salt solution can be a lithium bromide, lithium chloride, or calcium chloride solution. It utilizes 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 as the driving force for moisture transfer. Air humidity is controlled by the hygroscopic and dehumidifying properties of the solution. The electrolytic dehumidification module applies direct current to the electrodes, using an electrolyte membrane to remove moisture from the container. 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 then discharged from the container.

[0258] Compared with commonly used technologies, an embodiment of this application has the following beneficial effects: Through the combined design of the moisture permeation module 31 and the air duct, while the cold air blows over the cover plate 30 to cool the drawer 20, the excess moisture in the drawer 20 (i.e., the freshness compartment) passes through the moisture permeation module 31 and is carried away by the airflow, thereby effectively reducing the humidity in the drawer 20 and preventing condensation and frost in the drawer 20. By cleverly utilizing the cold air blown out by the cold air duct to cool while also carrying away moisture, the preservation effect of the food is improved, ensuring the long-term freshness of the food in the drawer 20 under low temperature and high humidity conditions.

[0259] Food storage also requires more controllable storage conditions, such as temperature, humidity, and oxygen content.

[0260] Taking humidity control as an example, the humidity difference between the fresh food storage room and the outside can be adjusted by the moisture permeation module 31. The humidity that needs to be adjusted in the fresh food storage room can be set as needed. For example, dry food is suitable for lower humidity, while fresh vegetables and fruits are suitable for higher humidity.

[0261] The moisture-permeable module 31 has the following characteristics: when the humidity inside the fresh-keeping compartment is significantly higher than the humidity outside, its passive moisture-permeable capacity carries water vapor from inside the compartment to the outside. This is especially true when the airflow speed outside the compartment is faster and the external air pressure is lower, resulting in a stronger passive dehumidification capability of the module. Conversely, if the airflow speed outside the compartment is slow, the moisture-permeable module 31's permeability is weaker, allowing it to maintain a higher humidity level inside the compartment. In other words, the higher the wind speed outside the compartment, the lower the humidity inside; conversely, the lower the wind speed outside the compartment, the higher the humidity inside.

[0262] A humidity sensor can be installed inside the preservation compartment to monitor the humidity inside drawer 20 in real time. The fan speed can be adjusted based on the humidity readings to ensure the humidity inside drawer 20 remains within the optimal range. When humidity is high and needs to be reduced, the fan speed can be increased; conversely, when humidity is relatively low, the fan speed can be decreased to slow down the evaporation of moisture from the moisture permeation module 31. The fan speed can be adjusted by controlling different duty cycles, 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 condensation or frost, thereby improving the overall preservation effect.

[0263] The oxygen control module is used to adjust the oxygen concentration inside the fresh food storage room. The oxygen control module can lower the oxygen concentration inside the fresh food storage room to be lower than the outside oxygen concentration, or raise it to be higher than the outside oxygen concentration, in order to meet the needs of different ingredients.

[0264] Taking lower oxygen levels as an example, some fresh ingredients can have their respiration inhibited in a low-oxygen environment, significantly reducing the rate of oxidation, decreasing microbial growth, and extending shelf life. This is especially true for perishable fruits and vegetables, where the preservation effect is particularly significant. A low-oxygen environment greatly enhances the preservation capabilities of some ingredients, making them suitable for the storage needs of more high-end foods.

[0265] The oxygen concentration in the outside atmosphere is generally around 21%, while the oxygen concentration in the fresh food storage room can be reduced to the range of 17% to 20%.

[0266] Taking increased oxygen content as an example, some foods exhibit better storage performance in environments with higher oxygen concentrations, such as fresh pork, beef, and lamb. In high-oxygen packaging, the higher oxygen concentration inhibits the growth and reproduction of anaerobic bacteria. Furthermore, the higher oxygen concentration allows it to combine with deoxymyoglobin on the muscle surface to form a thicker layer of oxymyoglobin, maintaining the meat's bright red color and improving its color stability. Simultaneously, the higher oxygen concentration protects the meat's color because lower oxygen concentrations induce the oxidation of deoxymyoglobin to methemoglobin. Under higher oxygen conditions, the meat surface primarily consists of oxymyoglobin, which is not directly oxidized to methemoglobin.

[0267] By adjusting the oxygen concentration to a level higher than the external environment—for example, the oxygen concentration inside a fresh food storage room can be increased to the range of 22% to 25%—the oxygen regulation module can provide a more suitable storage environment for these ingredients, maximizing their shelf life and maintaining their optimal taste and nutritional components.

[0268] In this embodiment, the cooling air supply path supplies cold air to the outside of the fresh-keeping compartment. The environment inside the fresh-keeping compartment is only directly connected to the oxygen-regulating module, while being relatively isolated from the space outside the fresh-keeping compartment. The cooling capacity is indirectly transferred to the inside of the fresh-keeping compartment through the outer wall of the compartment. This prevents the cold air from blowing directly onto the food inside drawer 20 and also prevents internal moisture from being directly carried away by the airflow, thus preventing the humidity inside drawer 20 from becoming too low. At the same time, it also prevents the oxygen-regulated environment from coming into contact with the external atmospheric environment again, which could cause changes in oxygen content.

[0269] In this way, the fresh food storage compartment achieves dynamic adjustment of oxygen concentration through the oxygen regulation module, ensuring that the indoor oxygen concentration can be flexibly adjusted according to the needs of the stored food. The introduction of the humidity control module 31 provides humidity control function for the fresh food storage compartment, avoiding excessive dryness or dampness that could lead to food dehydration or spoilage. Thus, based on the characteristics of the food, appropriate humidity, temperature, and oxygen content can be selected, while also taking into account the environmental changes brought about by oxygen regulation and humidity control. After adjustment, it can operate stably in this state, providing a better storage environment for the food, maximizing the preservation of its nutrition and freshness, and greatly improving the preservation effect.

[0270] The refrigeration unit 100 shows two side-by-side preservation compartments and their related structures in Figure 1. Figures 2 to 10 mainly indicate and describe the left-hand compartment of the two preservation compartments in Figure 1, while Figures 11 to 17 mainly indicate and describe the right-hand compartment of the two preservation compartments in Figure 1. It is understood that the positions of the two preservation compartments can be interchanged. In some embodiments, only one preservation compartment on the left or one on the right may be provided.

[0271] Next, referring to Figures 11 to 17, a detailed description will be given of another preservation compartment and its related specific structure provided in one embodiment.

[0272] As shown in Figures 11-13, in one embodiment, the preservation chamber is defined by the cylinder 10, that is, the interior of the cylinder 10 forms a space for food preservation by means of temperature, humidity and concentration of oxygen-controlled gas, and this space constitutes the preservation chamber.

[0273] A groove 117 is provided on the top wall 911 of the cylinder 10, and the moisture-permeable module 31 is housed in the groove 117 so that cold air from the cooling air path can blow over the upper surface of the moisture-permeable module 31. In this way, compared to the moisture-permeable module 31 being directly fixed to the upper surface of the top wall 911, the moisture-permeable module 31 can minimize airflow obstruction on the windward side, allowing the airflow to blow over the upper surface of the moisture-permeable module 31 more smoothly. Ideally, the upper surface of the moisture-permeable module 31 can be almost flush with the upper surface of the top wall 911, or the upper surface of the moisture-permeable module 31 can be slightly protruding from the upper surface of the top wall 911. In addition, the moisture-permeable module 31 is embedded in the groove 117, which makes the installation more stable and reliable. The moisture-permeable module 31 housed in the groove 117 can be more tightly combined with the top wall 911, avoiding displacement or loosening of the moisture-permeable module 31 and the top wall 911, and preventing shaking or detachment from the top wall 911 during use, thereby improving the durability and stability of the entire system.

[0274] As shown in Figure 12-15, the cooling air supply path includes an air outlet 41, and multiple air guide plates are installed on the top wall 911. These air guide plates are positioned opposite the air outlet 41, directing the cooling air in multiple directions to cover the moisture-permeable module 31. Through the rational layout of the air guide plates, the cooling airflow is evenly guided to every corner of the moisture-permeable module 31. On the one hand, this avoids areas or dead zones where cooling air is concentrated, preventing condensation from accumulating in a particular area, thus enhancing the working efficiency of the moisture-permeable module 31 and ensuring consistent humidity control. On the other hand, the cooling air blows from multiple directions, resulting in smoother airflow and ensuring uniform temperature distribution throughout the preservation compartment, thus solving the problem of uneven cooling air distribution.

[0275] As shown in Figure 15, the multiple air guides include a left air guide 111, a right air guide 113, and several intermediate air guides 112. A left air path 114 is formed between the left air guide 111 and one of the intermediate air guides 112, and a right air path 115 is formed between the right air guide 113 and one of the intermediate air guides 112. The airflow volumes of the left and right air paths 114 and 115 are basically the same. This balances the airflow on both sides, allowing for a more even distribution of cool air and preventing one side from being too strong or too weak, thus ensuring that food can be stored under balanced temperature and humidity conditions.

[0276] In addition, the middle air guide plate 112 extends in the front-to-back direction, the distance between the left air guide plate 111 and the middle air guide plate 112 gradually increases along the airflow direction, and the distance between the right air guide plate 113 and the middle air guide plate 112 gradually increases along the airflow direction.

[0277] The gradual increase in distance can be achieved using a straight, inclined method or an arc-shaped structure, so that the left air guide plate 111 and the right air guide plate 113 form an angle with the front-back direction. This angle can range from 30° to 60°. In addition, according to the location of the temperature sensor 118 described below, the left air guide plate 111 and the right air guide plate 113 can make way for it.

[0278] 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.

[0279] As shown in Figure 15, the refrigeration equipment 100 also includes a temperature sensor 118. The temperature sensor 118 is located on the outer side of the top wall 911 of the cylinder 10, and the left air guide plate 111 or the right air guide plate 113 separates the temperature sensor 118 from the cold air supply. The temperature sensor 118 can detect the temperature inside the drawer 20 in real time, thereby effectively controlling the temperature of the cold air and ensuring that the cold air is always within the optimal preservation temperature range. In addition, if the temperature sensor 118 is in the cold air supply, 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 118 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.

[0280] Further, as shown in Figures 14 and 15, a side air outlet 116 is provided at the end of the left air guide plate 111 and / or the right air guide plate 113 away from the air outlet 41. An air guide wall is provided on the side wall 913 of the cylinder 10, and a return air cavity is provided at the bottom of the cylinder 10. The cooling air path includes a return air port. The cold air blown out from the side air outlet 116 passes through the air guide wall and the return air cavity in sequence and is blown towards the return air port. Preferably, a side air outlet 116 is provided at the end of the left air guide plate 111 and the right air guide plate 113 away from the air outlet 41, and the side air outlets 116 are symmetrically designed. By setting a side air outlet 116 at the end of the left air guide plate 111 and / or the right air guide plate 113 away from the air outlet 41, and setting an air guide wall on the side wall 913 of the cylinder 10, and setting a return air cavity below, a closed-loop circulation of cold air is realized. The cold air can effectively return on the outside of the cylinder 10, and the flow of cold air is more stable and effective, avoiding the stagnation of cold air in local areas or the formation of dead corners in excessive local positions that are not easy to be cooled.

[0281] As shown in Figure 11, the refrigeration device 100 includes a first sealing ring 60. When the drawer 20 is located inside the cylinder 10 (i.e., the fresh-keeping compartment), the drawer 20 and the door frame 1011 of the cylinder 10 are sealed and abutted by the first sealing ring 60. The first sealing ring 60 ensures that the drawer 20 can fit tightly against the cylinder 10 when closed, preventing outside air from entering the fresh-keeping compartment (i.e., inside the cylinder 10) and disrupting its low-oxygen environment.

[0282] Further, as shown in Figures 12, 14, and 17, the cylinder 10 includes an air outlet 11 and a first air return port, and the drawer 20 includes a second air inlet 921 and a second air return port 22. The oxygen regulating module supplies air to the air outlet 11, and the air returns to the oxygen regulating module after passing through the second air inlet 921, the second air return port 922, and the first air return port in sequence. By introducing airflow through the air outlet 11 and then circulating it through the second air inlet 921 and the air return port inside the drawer 20 in a closed loop, oxygen is ensured to be evenly distributed within the preservation room.

[0283] This multi-stage airflow circulation design avoids uneven oxygen concentration in local areas, especially when storing large or complex-shaped food items. It ensures a consistent oxygen concentration throughout the drawer, extending the shelf life of the food. The entire airflow circulation path design not only guarantees continuous oxygen regulation but also improves the energy efficiency of the equipment and reduces energy waste through a reasonable airflow layout.

[0284] As shown in Figure 14, the oxygen regulating module includes an air outlet 951 and a third air return port 952, both facing the bottom wall 914 of the cylinder 10. An oxygen regulating passage is provided on the rear wall 912 of the cylinder 10. This passage includes an air groove 121, a third sealing ring 124, and a back plate 123, all located on the rear wall 912. The back plate 123 abuts against the third sealing ring 124. One end of the air groove 121 extends to the air outlet 951, and the other end extends to the air outlet 11 in the middle of the rear wall 912. In this way, the oxygen regulating module can more accurately distribute gas with a specially formulated oxygen concentration into the preservation compartment, and the third sealing ring 124 ensures that the airflow will not leak from gaps, improving the airtightness of oxygen transmission to the preservation compartment.

[0285] As shown in Figure 16, the first air return port (located opposite to the third air return port 952) is located on the bottom wall 914 of the cylinder 10, and multiple second air return ports 922 are provided, respectively located on the side and bottom of the drawer 20. This arrangement allows for the regulation of oxygen from below, humidity from above, and temperature from outside the preservation compartment, creating a reasonable spatial layout.

[0286] In other embodiments, in addition to being located at the top, the moisture-permeable module 31 can also be located on the rear wall 912 of the cylinder 10. When the drawer 20 is pushed and pulled all the way back, it will fit against the rear wall 912 with the moisture-permeable module, and the humidity will be adjusted from the rear. The space in front of the drawer 20 is more likely to have more food, while the space in the back is more likely to have less food. In other words, the space in the back is relatively empty compared to the front of the drawer 20. Therefore, this design of the rear-mounted moisture-permeable module 31 can effectively prevent food from directly contacting the moisture-permeable module 31 and can also make effective use of space.

[0287] Compared with existing technologies, one embodiment has the following beneficial effects: it can achieve precise regulation of oxygen concentration, humidity and temperature; its oxygen regulation module ensures the maintenance of low-oxygen or high-oxygen environments, such as using low oxygen to inhibit the respiration of food and extend the shelf life; the moisture permeation module 31 regulates humidity differences, which can maintain a relatively high humidity in the fresh-keeping room to keep the food moist, and also avoid condensation or frost; the cold air supply path supplies cold air on the outside of the fresh-keeping room (i.e., outside the cylinder 10), which can ensure uniform distribution of cold air and maintain the relative sealing of the fresh-keeping room, preventing the cold air from affecting the oxygen content or humidity in the fresh-keeping room. At the same time, it takes into account the control of oxygen regulation, humidity and temperature, so that food can be stored in an environment with suitable oxygen concentration, suitable temperature and suitable humidity, maximizing its nutrition and freshness, greatly improving the preservation effect and significantly improving the user experience.

[0288] Next, in one embodiment, the refrigerator further includes a cooling assembly, which includes a cooling air path, a first fan, and a first damper. When the first fan is running, the first damper is opened, and the cooling air path supplies cooling capacity to the outside of the fresh food compartment in order to cool the fresh food environment of the fresh food compartment.

[0289] As mentioned earlier, a fresh food storage room is a compartment specifically designed for preserving fresh ingredients, and the oxygen concentration inside can be adjusted.

[0290] In this application, regarding the description of cold air / cooling energy being blown towards the outside of the fresh-keeping compartment, in the structures shown in Figures 2 to 10, the cold energy is blown towards the cold air chamber 101 and flows outside the drawer 20. The cold energy is indirectly transferred to the inside of the drawer 20 through the cover plate 30 and the drawer 20. In contrast, in the structures shown in Figures 11 to 17, the cold energy is blown towards the outside of the cylinder 10 through the air outlet 41 without entering the inside of the cylinder 10. Both methods can cool the storage space in the drawer 20 inside the fresh-keeping compartment.

[0291] In one embodiment of this application, the temperature, humidity, and oxygen concentration of the fresh-keeping compartment specifically refer to the temperature, humidity, and oxygen concentration of the space inside the fresh-keeping compartment used for storing items. For example, in the structures shown in Figures 2 to 10, the temperature, humidity, and oxygen concentration of the fresh-keeping compartment refer to the temperature, humidity, and oxygen concentration of the space enclosed by the drawer 20 and the cover 30; as another example, in the structures shown in Figures 11 to 17, the temperature, humidity, and oxygen concentration of the fresh-keeping compartment refer to the temperature, humidity, and oxygen concentration of the space enclosed by the cylinder 10 (including the top wall 911, bottom wall 914, two side walls 913, and rear wall 912) and the door panel of the drawer 20.

[0292] In addition, the cooling system may also include a second fan and a second damper, wherein the first fan corresponds to the fresh-keeping compartment, and the second fan corresponds to the refrigeration compartment 40. Alternatively, when the first damper and the second damper are open, the first fan can simultaneously supply cooling to both the outside of the fresh-keeping compartment and the refrigeration compartment 40. The following explanation uses the example of a single fan simultaneously supplying cold air to both the fresh-keeping compartment and the refrigeration compartment 40.

[0293] Furthermore, the first operating state of the cooling component, as distinguished below, cools the outside of the fresh-keeping compartment. For example, it is a state where the first fan is running, the first damper is open, and the cold air supplied to the fresh-keeping compartment by the cooling air supply path only flows outside the fresh-keeping compartment. At this time, the second damper can be closed.

[0294] The cooling unit can also have a second operating state, a third operating state, and a fourth operating state. In the second operating state, the first fan is running, the first damper is closed, and the second damper is open. In the third operating state, the first fan is running, the first damper is open, and the second damper is open. In the fourth operating state, the first fan is off, the first damper is closed, and the second damper is closed.

[0295] Cold air can be blown into the refrigeration compartment 40 and into the interior or exterior of the fresh food compartment.

[0296] The cooling air supply circuit connects the refrigeration chamber 40 and the refrigeration system. When the second damper is opened, the first fan and / or the second fan can blow the cooling capacity of the evaporator in the evaporator chamber into the refrigeration chamber 40. The cooling air supply circuit contains a portion of the refrigeration system, for example, the cooling air supply circuit includes air ducts and the evaporator chamber.

[0297] A first, closable damper is installed between the outside of the fresh-keeping compartment and the cooling air supply line. When the first damper is open and the first fan is running, it blows the cooling air from the cooling air supply line, especially the cooling air from the evaporator, to the outside of the fresh-keeping compartment. The first damper can be connected to a motor; the motor rotates the first damper to open and close it. When the first damper is open, the cooling air supply line is connected to the outside of the fresh-keeping compartment, allowing cold air to circulate around the fresh-keeping compartment and cool it down. When closed, it isolates the cooling air supply line from the fresh-keeping compartment. A second damper also uses the same structure as the first damper.

[0298] Referring to Figures 18 and 19, an embodiment also provides a control method for a refrigeration device 100, which can specifically be a control method for oxygen regulation. Although this application provides method operation steps as shown in the following embodiments or flowcharts, based on conventional or non-creative labor, the execution order of these steps in which there is no necessary causal relationship in logic is not limited to the execution order provided in the embodiments of this application.

[0299] Specifically, as shown in Figure 18, the oxygen regulation control method of the refrigeration equipment 100 includes the following steps:

[0300] Step S20: During the operation of the oxygen control module, continuously monitor the temperature Tt of the fresh food compartment and the temperature Tr of the refrigeration compartment 40.

[0301] The temperature Tt of the fresh food storage compartment can be monitored by temperature sensors 80 and 118; the refrigeration equipment 100 may also include other temperature sensors to detect the temperature Tr of the refrigeration compartment 40. Preferably, these temperature sensors are used to continuously monitor the temperature of the fresh food storage compartment and the temperature of the refrigeration compartment 40 during the operation of the oxygen control module.

[0302] Step S41: Determine whether the temperature Tr of the refrigeration chamber 40 is lower than the high temperature threshold Tr' of refrigeration, and whether the temperature Tt of the preservation chamber is higher than the oxygen regulation temperature threshold Tt'.

[0303] Step S51: If both are true, the refrigeration system stops and the cooling component switches to the first operating state.

[0304] If the effects of oxygen regulation and refrigeration are not considered as a whole, and the entire refrigeration chamber 40 and the fresh-keeping chamber are refrigerated only through the refrigeration system, when the temperature of the refrigeration chamber 40 is already lower than the set value, further refrigerating the refrigeration chamber 40 in order to refrigerate the fresh-keeping chamber will result in an excessively low storage environment temperature, affecting the preservation effect.

[0305] In this embodiment, the operation of the refrigeration system, the operation of the first fan, and the opening and closing of the first damper are coordinated to ensure that when the refrigeration compartment 40 does not need to be refrigerated, the fresh food compartment can use the existing cooling capacity of the evaporator for refrigeration, thus avoiding over-refrigeration of the refrigeration compartment 40.

[0306] Specifically, assuming the high-temperature threshold for refrigeration is 4℃ and the oxygen-regulating temperature threshold is 1℃, when the temperature of the refrigeration chamber 40 is lower than the high-temperature threshold for refrigeration, for example, when the temperature of the refrigeration chamber 40 is 3℃, the refrigeration system stops, and the temperature of the refrigeration evaporator may be -20℃ to -30℃. At this time, the temperature of the fresh food storage chamber is also 3℃. Through step S51, without running the refrigeration system, that is, when the compressor is not working, the existing cooling capacity of the evaporator is used to cool the fresh food storage chamber. This can prevent the temperature of the refrigeration chamber 40 from being too low, and also lower the temperature of the fresh food storage chamber to a suitable temperature. This avoids the decrease in the preservation effect caused by the excessively high temperature of the fresh food storage chamber, and avoids the food from freezing due to the excessively low temperature of the refrigeration chamber 40.

[0307] Furthermore, this method reduces the frequency of switching the refrigeration system on and off, improving the energy efficiency of the equipment. This solution enhances the intelligence level of the refrigeration equipment 100, ensuring that while maintaining a suitable oxygen concentration, the temperature is also controlled within a suitable range.

[0308] In addition, the refrigeration compartment 40 can be a refrigerator compartment, and the fresh-keeping compartment is formed inside the drawer 20 (as shown in Figures 2 to 10) or inside the cylinder 10 that houses the drawer 20 (as shown in Figures 11 to 17). That is to say, the volume of the refrigeration compartment 40 is much larger than the volume of the fresh-keeping compartment. Therefore, when the refrigeration system has been shut down, the existing cooling capacity of the evaporator can maintain a dynamic balance between the cooling of the refrigerator compartment and the natural heating of the refrigerator compartment itself for a certain period of time. When the refrigeration system is shut down, the temperature of the refrigeration compartment 40 will not drop too much, and the remaining cooling capacity of the refrigeration system is sufficient to lower the temperature of the fresh-keeping compartment.

[0309] Furthermore, as shown in Figure 19, the oxygen regulation control method also includes the following steps:

[0310] Step S10: When the downtime of the oxygen regulation module is greater than the downtime cycle time, switch the oxygen regulation module to the working state.

[0311] The oxygen adjustment module operates in a periodic manner, with a working cycle time t1 and a shutdown cycle time t2. That is to say, the oxygen adjustment module can be shut down after working for time t1, and then restarted after shutdown for time t2, and so on.

[0312] Step S10 is when the downtime exceeds t2, the system returns to the working state. That is, when the downtime of the oxygen adjustment module exceeds the set cycle time, the system will automatically switch the oxygen adjustment module to the working state, which can effectively avoid the situation where the oxygen concentration is out of control due to the oxygen adjustment module being shut down for too long.

[0313] Through proper time management and automatic control, this oxygen regulation module can maintain a continuous and stable oxygen concentration environment without manual intervention. For food items requiring long-term storage, it can maintain their freshness over a longer storage period, preventing spoilage due to changes in oxygen concentration. Furthermore, the automated adjustment not only improves system efficiency, as the oxygen regulation module only activates when necessary, avoiding unnecessary energy consumption.

[0314] In addition, the work cycle time t1 and the downtime cycle time t2 can be a guarantee period, meaning that the arrival of the downtime cycle time t2 does not mean that work will start immediately. For example, the following steps can be performed:

[0315] When the downtime of the oxygen control module is longer than the downtime cycle time, check whether the refrigeration system is in a shutdown state.

[0316] If the refrigeration system is in a shutdown state, switch the oxygen regulation module to the working state;

[0317] If the refrigeration system is not in a shutdown state, the oxygen regulation module will be switched to the working state after the refrigeration system is shut down.

[0318] If the refrigeration system is operating, the oxygen regulation module is not activated immediately. Instead, it is activated only after the refrigeration system has stopped. This avoids refrigeration conflicts that can occur when the oxygen regulation module is running simultaneously during the refrigeration process. For example, if the temperature of the oxygen-regulating gas is too low or too high, and its temperature differs from the external cooling capacity of the crisper drawer, the temperature inside drawer 20 may be difficult to control accurately, making it hard to judge. Therefore, the oxygen regulation module is switched to operating mode only after the refrigeration system has stopped. This phased and rationally arranged operating mode allows the system to effectively and accurately control the temperature, avoid excessive energy consumption, and improve energy efficiency.

[0319] Furthermore, the oxygen-regulating module and refrigeration system can operate at different times, ensuring that they do not interfere with each other and avoiding the superposition of noise from both types of equipment, thus reducing the maximum noise emitted by the refrigeration equipment. Each module also operates independently, avoiding resonance and improving the overall balance and stability of the system. Ultimately, this ensures that the operation of both the oxygen-regulating module and the refrigeration system can more accurately meet the preservation requirements.

[0320] The oxygen control module is used to adjust the oxygen concentration in the preservation compartment, making the oxygen concentration in the preservation compartment lower than the external oxygen concentration, or raising it to a level higher than the external oxygen concentration, to meet the needs of different foods. For example, in two preservation compartments, one can have an oxygen concentration lower than the external oxygen concentration, while the other can have an oxygen concentration higher than the external oxygen concentration.

[0321] By precisely controlling oxygen concentration, a stable low-oxygen environment can be provided for stored food, inhibiting respiration and extending shelf life. The benefits of a low-oxygen environment include a significant reduction in oxidation rates and microbial growth, particularly for perishable fruits and vegetables, where the preservation effect is especially pronounced. Because this solution precisely controls oxygen concentration, it avoids the instability in food quality caused by large fluctuations in oxygen concentration in traditional equipment, thus ensuring long-term preservation.

[0322] The oxygen concentration in the outside atmosphere is generally around 21%, while the oxygen concentration in the fresh food storage room can be reduced to the range of 17% to 20%.

[0323] In addition, if some ingredients require a high-oxygen environment, the oxygen regulation module can also be used to adjust the oxygen concentration in the preservation compartment so that the oxygen concentration in the preservation compartment is higher than the oxygen concentration in the outside, for example, to make the oxygen concentration in the preservation compartment reach the range of 22% to 25%.

[0324] Furthermore, as shown in Figure 19, the oxygen regulation method also includes the following steps:

[0325] Step S30: During the operation of the oxygen regulation module, when the working time of the oxygen regulation module is greater than the working cycle time, the oxygen regulation module is switched to the shutdown state.

[0326] By setting an upper limit for the working time of the oxygen regulating module, it can automatically shut down when the oxygen concentration reaches the expected target, avoiding abnormal oxygen concentration, effectively reducing energy waste, improving the energy efficiency of the equipment, and also reducing mechanical wear and extending its service life. Furthermore, the automatic shutdown function avoids the potential for system overheating or efficiency degradation that may result from prolonged continuous operation of the oxygen regulating module, thus enabling the system to maintain efficient and stable operation for an extended period.

[0327] Continuing as shown in Figure 19, the oxygen regulation control method also includes the following steps:

[0328] Step S42: Determine whether the temperature of the refrigeration chamber 40 is higher than the high temperature threshold Tr' and whether the temperature Tt of the preservation chamber is higher than the oxygen regulation temperature threshold Tt';

[0329] Step S52: If both are true, the refrigeration system is started, the first fan runs, and the first damper is opened.

[0330] When the temperature in both the cooling compartment (40) and the fresh food compartment is too high, the refrigerator's overall temperature becomes excessive. The system automatically activates cooling, simultaneously turning on the first fan and the first damper to allow cold air to enter the perimeter of the fresh food compartment, thereby lowering the temperature of both compartments. This system responds quickly and effectively to high temperatures, preventing a decline in food preservation due to excessive heat.

[0331] Continuing as shown in Figure 19, the oxygen regulation control method also includes the following steps:

[0332] Step S43: Determine whether the temperature Tr of the refrigeration chamber 40 is lower than the high temperature threshold Tr' and whether the temperature Tt of the preservation chamber is lower than the oxygen regulation temperature threshold Tt';

[0333] Step S53: If both are true, the refrigeration system stops, the first fan stops, and the first damper closes.

[0334] When the temperature in the refrigeration compartment 40 falls below the set value, and the temperature in the fresh-keeping compartment is also low, the system will shut down and close the first fan and the first damper, ceasing cooling of both the fresh-keeping and refrigeration compartments 40 to prevent further temperature drops. This reasonable shutdown mechanism prevents the refrigeration and fresh-keeping compartments from becoming too cold due to continuous cooling, thus avoiding damage to food caused by excessively low temperatures. Furthermore, it effectively reduces unnecessary system operation time, decreases energy consumption, and extends the equipment's lifespan.

[0335] Compared with the prior art, this embodiment has the following beneficial effects: The oxygen regulation control method can achieve precise cooling of the fresh food storage room by utilizing the existing cooling capacity without further cooling of the refrigeration chamber 40. This can avoid the risk of excessively low temperatures in both the refrigeration chamber 40 and the fresh food storage room, while effectively reducing the temperature of the fresh food storage room. This ensures that the food is kept fresh in a suitable low-oxygen and suitable-temperature environment, improves the refrigeration efficiency of the equipment, enhances the intelligence level of the refrigeration equipment, and ensures that the temperature is controlled within a suitable range while maintaining a suitable oxygen concentration.

[0336] Refrigeration equipment may also include, but is not limited to, a processing module, a storage module, and a computer program stored in the storage module and capable of running on the processing module, such as the various control methods and programs for refrigeration equipment described above and subsequently.

[0337] When the processing module executes the computer program, it implements the steps in the control method for oxygen regulation of the above-mentioned refrigeration devices, such as the steps shown in Figures 18 and 19.

[0338] Specifically, the processing module is at least used to control the refrigeration system to shut down and switch the cooling component to the first operating state when the temperature of the refrigeration chamber 40 is lower than the high temperature threshold for refrigeration and the temperature of the fresh-keeping chamber is higher than the oxygen-regulating temperature threshold.

[0339] Next, one embodiment of this application also provides another control method for the refrigeration device 100, a humidity regulation method that can effectively regulate humidity and avoid excessively low temperature.

[0340] As mentioned above, the moisture-permeable module 31 is used to regulate the humidity of the fresh-keeping compartment, especially the humidity inside the drawer 20. Specifically, for example, for the fresh-keeping compartments shown in Figures 2 to 10, the moisture-permeable module 31 is disposed on the cover 30 of the drawer 20, which can be used to regulate the humidity inside the drawer 20, so that the humidity inside and outside the drawer 20 is different, that is, to regulate the humidity of the fresh-keeping compartment; while for the fresh-keeping compartments shown in Figures 11 to 17, the moisture-permeable module 31 is disposed on the top wall 911 of the cylinder 10, which can be used to regulate the humidity inside the drawer 20, so that the humidity inside and outside the fresh-keeping compartment (that is, inside and outside the cylinder 10) is different.

[0341] Preferably, by setting the moisture permeability module 31, the humidity can be adjusted according to the characteristics of the stored food to keep it in the optimal storage condition. Furthermore, the humidity sensor can be used to continuously monitor the humidity of the fresh food storage compartment. In this application, the humidity of the fresh food storage compartment refers to the humidity of the effective storage area within the fresh food storage space 10, that is, the humidity inside the drawer 20. Whether it is the fresh food storage compartment shown in Figures 2 to 10, or the fresh food storage compartment shown in Figures 11 to 17, the humidity inside the drawer 20 constitutes the "humidity of the fresh food storage compartment".

[0342] Referring to Figures 20 and 21, an embodiment of a refrigeration device 100 provides a method for controlling humidity regulation. Although this application provides method operation steps as shown in the following embodiments or flowcharts, based on conventional or non-inventive effort, the execution order of steps in the method that do not logically have a necessary causal relationship is not limited to the execution order provided in the embodiments of this application.

[0343] Specifically, as shown in Figure 20, the humidity control method of the refrigeration equipment 100 includes the following steps:

[0344] Step S10: Continuously monitor the humidity of the preservation room.

[0345] Step S20: Determine whether the humidity of the preservation room is greater than the first humidity threshold.

[0346] Step S30: If yes, determine whether the temperature of the preservation room is lower than the preservation temperature threshold.

[0347] Step S40: If the temperature of the preservation room is lower than the preservation temperature threshold, after the refrigeration system is shut down and a preset time has elapsed, the cooling component switches to the first operating state.

[0348] Specifically, in the above method, the first humidity threshold can be a preset critical value, which is a relatively high humidity value. When the humidity in the fresh-keeping room is greater than the first humidity threshold, it means that the humidity is too high and dehumidification is required. The fresh-keeping temperature threshold is also a preset critical value, which is a relatively low temperature value. When the temperature in the fresh-keeping room is lower than the fresh-keeping temperature threshold, it means that the temperature is too low and it is not advisable to continue lowering the temperature.

[0349] Step S20 is used to determine whether dehumidification is needed, and step S30 is used to determine whether cooling can continue. According to the above description, when it is determined that dehumidification is needed based on step S20, the method is to increase the air speed so that more airflow blows over the surface of the moisture-permeable module 31. However, more airflow means that the temperature of the fresh food compartment will be further reduced. When the judgment results of steps S20 and S30 are both yes, a contradiction will occur. Therefore, when it is determined that the temperature cannot be further reduced based on step S30, step S40 is executed. When the temperature in the fresh food compartment is lower than the preset fresh food temperature threshold, the refrigeration system will stop running. After a preset time, the cooling component will switch to the first operating state to solve the problem of excessively low temperature during the humidity adjustment process of the fresh food compartment.

[0350] More specifically, in humidity control, without proper temperature monitoring, the temperature in the fresh food storage compartment may drop too quickly, causing food to freeze or overcool, thus affecting its freshness. By introducing a preservation temperature threshold, humidity control is delayed when the temperature is too low, ensuring that the temperature inside the fresh food storage compartment does not continue to drop during humidity adjustment. Only after a preset time has elapsed does the airflow from the first fan pass through the moisture permeation module 31, effectively reducing the humidity inside the fresh food storage compartment and preventing condensation caused by excessive humidity. This process ensures the effectiveness of humidity control while avoiding food damage due to excessively low temperatures, achieving dual control of humidity and temperature and effectively extending the food's shelf life.

[0351] Further, as shown in Figure 21, if step S30 determines no, that is, the temperature of the preservation chamber is not lower than the preservation temperature threshold, then the following steps are executed:

[0352] Step S50: Determine whether the temperature of the refrigeration chamber 40 is higher than the high temperature threshold for refrigeration;

[0353] Step S61: If the temperature of the refrigeration chamber 40 is higher than the high temperature threshold for refrigeration, the refrigeration system is started and the cooling component is switched to the first operating state;

[0354] Step S62: If the temperature of the refrigeration chamber 40 is not higher than the high temperature threshold for refrigeration, the refrigeration system maintains its current state, and the cooling component switches to the first operating state. The maintained current state means that if the current state is the operating state, the refrigeration system continues to operate; if the refrigeration system has been shut down, it continues to be shut down.

[0355] These steps further optimize and clarify the humidity and temperature regulation mechanism of the entire system. When the temperature of the fresh food storage room in step S30 is higher than the fresh food temperature threshold, that is, when the temperature is not too low, it can be directly dehumidified. During the direct dehumidification process, the fresh food storage room can be cooled down at the same time due to the flow of cold air.

[0356] Specifically, step S50 is used to determine the temperature of the refrigeration chamber 40. If the temperature of the refrigeration chamber 40 is higher than the high temperature threshold for refrigeration, it means that the temperature of the refrigeration chamber 40 is too high, and it also means that the temperature of the evaporator is too high. Therefore, the refrigeration chamber 40 needs to be refrigerated. At this time, step S61 is executed to start the refrigeration system, that is, to lower the temperature of the evaporator to ensure that the refrigeration chamber is maintained within a suitable temperature range. At the same time, the temperature of the evaporator begins to drop, and the refrigeration chamber 40 and the fresh food compartment are refrigerated simultaneously.

[0357] If the temperature of the refrigeration chamber 40 is not higher than the high-temperature threshold for refrigeration, it indicates that the temperature of the refrigeration chamber 40 is suitable, and the temperature of the evaporator is suitable and does not need to be lowered. Therefore, there is no need to refrigerate the refrigeration chamber 40. In this case, step S62 is executed, and only the fresh-keeping chamber is refrigerated, while the refrigeration chamber 40 is not refrigerated. The volume of the refrigeration chamber 40 is much larger than that of the fresh-keeping chamber. Therefore, when the refrigeration system is shut down, the existing cooling capacity of the evaporator for cooling the fresh-keeping chamber and the natural temperature rise of the fresh-keeping chamber itself can be in a state of dynamic equilibrium for a certain period of time. When the refrigeration system is shut down, the temperature of the refrigeration chamber 40 will not drop excessively, and the remaining cooling capacity of the refrigeration system is sufficient to lower the temperature of the fresh-keeping chamber. This design not only ensures the smooth operation of humidity regulation but also considers various situations, avoiding the problem of excessive or insufficient temperature reduction in some chambers, thus improving the efficiency of the entire refrigeration system.

[0358] Furthermore, the humidity control method for refrigeration equipment also includes the following steps:

[0359] When the humidity in the preservation room is less than the second humidity threshold, the first damper is closed to avoid excessive dehumidification, wherein the second humidity threshold is less than the first humidity threshold.

[0360] The second humidity threshold is lower than the first humidity threshold. This means that after the first damper opens and the first fan starts operating, the humidity in the preservation compartment is reduced to a sufficiently low value, and then the reduction stops. By setting the humidity threshold, the operation of the first fan can be flexibly controlled, thereby precisely regulating the humidity in the preservation compartment to ensure it remains within a suitable range, effectively preventing the problem of excessively low humidity leading to a dry environment. In this way, the system can flexibly control the opening and closing of the first fan and the first damper based on real-time humidity changes, ensuring that the humidity in the preservation compartment is always maintained at a suitable level. This dynamic humidity control method not only improves the preservation effect but also reduces unnecessary energy consumption and improves the overall efficiency of the system.

[0361] Step S40 further includes:

[0362] Step S41: If the refrigeration system is currently in operation, the first damper is closed. After the refrigeration system stops and a first preset time has elapsed, the first damper is opened and the first fan starts running.

[0363] Step S41 refines the temperature control logic during humidity adjustment. When the temperature is low and the refrigeration system is running, the first fan will only be activated after the refrigeration system has completely stopped and a certain time interval has elapsed. This ensures that the evaporator temperature will not drop too low during humidity adjustment, preventing further temperature drops within the preservation compartment due to airflow. This achieves precise humidity control at low temperatures, effectively avoiding the negative impact of over-cooling on food, better protecting food quality, and further enhancing the system's preservation performance.

[0364] Furthermore, step S40 also includes:

[0365] Step S42: If the refrigeration system is currently in a shutdown state, the first damper is closed. After the refrigeration system has stopped and a second preset time has elapsed, the first damper is opened and the first fan starts running.

[0366] Steps S41 and S42 describe two scenarios for subsequent judgment when the temperature in the preservation chamber is lower than the preservation temperature threshold, namely, how to proceed with subsequent steps when the refrigeration system is not stopped and when it has stopped. Since the refrigeration system has been stopped for a period of time in step S42, the temperature of the evaporator in step S42 is generally higher than the temperature of the evaporator in step S41. Therefore, the duration of the second preset time can be shorter than the duration of the first preset time.

[0367] Step S42 clarifies how to determine the start-up timing to precisely control humidity and temperature when the temperature in the fresh-keeping compartment is low and the refrigeration system is off, ensuring that airflow does not operate at excessively low temperatures. This solution effectively improves the accuracy of temperature control and further optimizes the humidity and temperature management of the fresh-keeping compartment.

[0368] Furthermore, the second preset time can be the difference between the shutdown cycle time and the shutdown time. The shutdown cycle time can be a preset duration, such as the first preset time. The shutdown time is the time from when the refrigeration system starts to shut down until the judgment is made that the temperature of the preservation room is lower than the preservation temperature threshold.

[0369] Furthermore, when the first fan in this embodiment is operating, the cold air supplied to the fresh-keeping compartment only flows outside the fresh-keeping compartment. The cold air is indirectly transferred to the fresh-keeping compartment through the outer wall of the drawer 20 and the cover plate 30 (e.g., the structure shown in Figures 2 to 10) or the outer wall of the cylinder 10 (e.g., the structure shown in Figures 11 to 17). This avoids the cold air from blowing directly onto the food inside the drawer 20 and also prevents the internal moisture from being directly carried away and lost by the airflow. This prevents the humidity inside the drawer 20 from becoming too low, resulting in a better preservation effect.

[0370] In one embodiment, during the operation of the oxygen regulation module, the temperature of the fresh food storage compartment and the temperature of the refrigeration compartment 40 can be continuously monitored. When the temperature of the refrigeration compartment 40 is lower than the high temperature threshold for refrigeration and the temperature of the fresh food storage compartment is higher than the oxygen regulation temperature threshold, the refrigeration system stops, the first fan runs, and the first damper opens.

[0371] When temperature, oxygen, and humidity are controlled simultaneously, the following steps can be performed:

[0372] Step S70: While monitoring whether the humidity in the fresh food storage room is greater than the first humidity threshold and during the operation of the oxygen control module, continuously monitor the temperature and humidity of the fresh food storage room and the temperature of the refrigeration room 40, and record the working time of the oxygen control module.

[0373] Step S80: Determine whether the temperature of the preservation room is lower than the preservation temperature threshold.

[0374] Step S81: If so, after the refrigeration system is shut down and a preset time has elapsed, the first damper opens and the first fan starts running.

[0375] Step S82: If not, determine whether the temperature of the refrigeration chamber 40 is lower than the high temperature threshold for refrigeration.

[0376] Step S821: If yes, the refrigeration system stops, the first fan runs, and the first damper opens.

[0377] Step S822: If not, the refrigeration system operates, the first fan operates, and the first damper opens.

[0378] Step S90: When the working time of the oxygen adjustment module is greater than the working cycle time, the oxygen adjustment module is switched to the shutdown state; when the humidity of the fresh food storage room (10) is less than the second humidity threshold, the first air damper is closed, wherein the second humidity threshold is less than the first humidity threshold.

[0379] Through the above steps, it is possible to achieve simultaneous operation of temperature regulation, oxygen regulation, and humidity regulation. This not only effectively utilizes the residual cooling of the evaporator when the refrigeration system is shut down, but also avoids the food from freezing due to excessively low temperatures caused by the residual cooling of the evaporator. It also avoids over-cooling of the refrigeration room 40 and other situations, and stops oxygen regulation or dehumidification at appropriate times, thus achieving better technical effects in regulating temperature, oxygen, and humidity.

[0380] Compared with the prior art, this embodiment has the following beneficial effects: When the humidity regulation control method of the refrigeration equipment 100 is performing humidity regulation, if the temperature of the fresh food compartment is detected to be lower than the preset temperature threshold, the time for starting humidity regulation in the fresh food compartment is delayed. After the refrigeration system stops and the preset time has elapsed, the fan is turned on to perform humidity regulation. In this way, the temperature in the fresh food compartment will not drop excessively while the humidity is being regulated, which can effectively avoid the food from freezing due to excessively low temperature, avoid the negative impact of excessively low temperature on the food, maintain a suitable humidity environment in the fresh food compartment, and improve the storage quality and preservation period of the food.

[0381] When the processing module executes the computer program, it implements the steps in the humidity regulation control method of the above-mentioned refrigeration devices, such as the steps shown in Figures 20 and 21.

[0382] The humidity sensor of the refrigeration equipment is used to continuously monitor the humidity of the fresh food compartment. The humidity difference between the fresh food compartment and the refrigeration compartment 40 is adjusted by the moisture permeation module 31. When the cooling component is in the first operating state, the cold air from the refrigeration system is blown through the moisture permeation module 31.

[0383] The processing module is used to determine whether the temperature of the fresh-keeping room is lower than the fresh-keeping temperature threshold when the humidity of the fresh-keeping room is greater than the first humidity threshold; if the temperature of the fresh-keeping room is lower than the fresh-keeping temperature threshold, the cooling component switches to the first operating state after the refrigeration system is shut down and a preset time has elapsed.

[0384] [Second Embodiment]

[0385] As shown in Figures 22 and 23, the refrigeration equipment 100 provided in this embodiment includes a refrigeration chamber 40, a fresh-keeping chamber 810 located in the refrigeration chamber 40, refrigeration components, and a cooling air supply line 840.

[0386] The refrigeration compartment 40 can be formed by the inner liner of the refrigeration equipment 100. Depending on the set temperature, it can be a refrigerator compartment, a freezer compartment, a variable temperature compartment, etc. In this embodiment, the refrigeration compartment 40 where the fresh food compartment 810 is located is preferably a refrigerator compartment.

[0387] When preserving food, not only can the temperature of the food be lowered, but the oxygen content in the environment surrounding the food can also be adjusted. The oxygen content in the fresh-keeping compartment 810 is adjustable, and users can place certain foods with preservation requirements, such as vegetables and fruits, specifically into the fresh-keeping compartment 810. The refrigeration equipment 100 includes an oxygen-regulating module connected to the fresh-keeping compartment 810 for controlling the oxygen content within the fresh-keeping compartment 810. The oxygen-regulating module can either lower or raise the oxygen content in the fresh-keeping compartment 810.

[0388] Specifically, the oxygen regulation module includes a cathode, an anode, and an electrolyte filling the space between the cathode and the anode. The oxygen regulation module comes into contact with air from the fresh-keeping compartment 810 through the cathode. Oxygen from the air in the fresh-keeping compartment 810 undergoes a reduction reaction at the cathode: O2 + 2H2O + 4e- - →4OH - Correspondingly, an oxidation reaction occurs at the anode, producing oxygen, i.e.: 4OH- - →O2 + 2H2O + 4e - The oxygen generated at the anode is released into the atmosphere. It can be seen that the oxygen regulation module can transfer the oxygen in the fresh food compartment 810 to the atmosphere, thereby reducing the oxygen concentration in the fresh food compartment 810.

[0389] As can be imagined, to increase the oxygen content in the fresh food compartment 810, the cathode can be exposed to air from the atmosphere. The oxygen in the air from the atmosphere will undergo a reduction reaction at the cathode: O2 + 2H2O + 4e - →4OH - Correspondingly, an oxidation reaction occurs at the anode, producing oxygen, i.e., 4OH⁻. -→O2 + 2H2O + 4e - The oxygen generated at the anode is discharged into the fresh food compartment 810 to increase the oxygen content in the fresh food compartment 810.

[0390] The refrigeration components are located in the cooling air supply line 840, and both are generally located at the rear of the refrigeration chamber 40. The refrigeration components include components such as evaporator 831 and fan 832. Evaporator 831 is used to absorb heat to generate cold air, while fan 832 is used to discharge the generated cold air from the cooling air supply line 840 to the required location.

[0391] The fresh-keeping compartment 810 is surrounded by an external air passage 821, and a cooling air passage 840 is used to supply cooling to the refrigeration compartment 40, the external air passage 821, and the fresh-keeping compartment 810. That is, the cooling air passage 840 connects the refrigeration compartment 40, the external air passage 821, and the fresh-keeping compartment 810. A third air door 841 that can be opened and closed is provided between the fresh-keeping compartment 810 and the cooling air passage 840, and a first air door 842 that can be opened and closed is provided between the external air passage 821 and the cooling air passage 840.

[0392] When the third damper 841 is open, the fresh-keeping compartment 810 is connected to the cooling air supply path 840, allowing the cooling airflow in the cooling air supply path 840 to enter the fresh-keeping compartment 810. When the third damper 841 is closed, the fresh-keeping compartment 810 and the cooling air supply path 840 are not connected. When the first damper 842 is open, the external air passage 821 is connected to the cooling air supply path 840, allowing the cooling airflow in the cooling air supply path 840 to enter the external air passage 821. When the first damper 842 is closed, the external air passage 821 and the cooling air supply path 840 are not connected. It is conceivable that the cooling airflow entering the external air passage 821 can only indirectly cool the fresh-keeping compartment 810, and its cooling effect is weaker than when the cooling airflow directly enters the fresh-keeping compartment 810.

[0393] To clearly express the position and direction described in this embodiment, in this embodiment, up and down are defined by the direction of gravity, that is, the direction of gravity is downward and the opposite direction is upward. When the user operates the items in the refrigeration equipment, the user stands in front of the refrigeration equipment, and the opposite direction is behind. The two sides of the plane containing front, back, up and down are the left and right sides, respectively.

[0394] As shown in Figures 24-25, in one embodiment of this application, the refrigeration device 100 includes a cylindrical body 822 and a drawer. The drawer includes a box body 823 and a door panel 824. The cylindrical body 822 has a first opening 221 that opens forward, and the box body 823 has an opening 231 that opens upward. The box body 823 is located inside the cylindrical body 822, and the door panel 824 is connected to the box body 823 and is used to open and close the first opening 221.

[0395] The user can push and pull the door panel 824 to move the box body 823, allowing it to enter and exit the cylinder 822 through the first opening 221. The box body 823 is used to store food. After the user pulls the door panel 824 outward, moving at least part of the box body 823 outside the cylinder 822, the food can be placed inside the box body 823. Then, the user pushes the door panel 824 to close the first opening 221, and the food is stored inside the cylinder 822. In this embodiment, the fresh-keeping compartment 810 is formed by the cylinder 822 and the door panel 824, and the fresh-keeping compartment 810 is located inside the refrigeration compartment 40 formed by the inner liner.

[0396] The refrigeration equipment 100 includes a plurality of cover plates disposed around the cylinder 822, and the peripheral air passage 821 is formed between the cover plates and the cylinder 822.

[0397] The cooling air supply path 840 includes an air outlet 43 connecting to the external air supply path 821 and a return air inlet 44. The cooling airflow within the cooling air supply path 840 flows into the external air supply path 821 through the air outlet 43 and then returns to the cooling air supply path 840 through the return air inlet 44. The return air inlet 44 can also be used for the return air of the entire cooling room 40.

[0398] The air outlet 43 and the return air inlet 44 are located on the rear side of the cylinder 822. The cylinder 822 has a guide plate 25 for the cooling airflow from the air outlet 43 to flow through different sides of the cylinder 822. Under the action of the guide plate 25, the cooling airflow is guided forward and flows through different sides of the cylinder 822. After that, the cooling airflow will flow backward into the return air inlet 44. In this way, the cooling airflow can be evenly flowed through all parts of the cylinder 822. When cooling the fresh food compartment 810, the temperature in all parts of the fresh food compartment 810 will remain uniform.

[0399] Specifically, the cylinder 822 includes a top wall 222, a left side wall 223, and a right side wall 224. The air guide plate 25 includes a first air guide plate 251 and a second air guide plate 252 located on the top wall 222. The first air guide plate 251 extends from back to front, from the air outlet 43 to the edge of the top wall 222 near the left side wall 223. The second air guide plate 252 extends from back to front, from the air outlet 43 to the edge of the top wall 222 near the right side wall 224. Thus, the cooling airflow from the air outlet 43 will first flow from back to front under the action of the first air guide plate 251 and the second air guide plate 252, then flow from the front end of the first air guide plate 251 to the left side wall 223 and from the front end of the second air guide plate 252 to the right side wall 224, and finally enter the return air outlet 44.

[0400] A moisture-permeable module 26 is provided on the cylinder 822 for the preservation chamber 810. The moisture-permeable module 26 is located on the top wall 222. The moisture in the preservation chamber 810 can be discharged to the outside through the moisture-permeable module 26.

[0401] As shown in Figure 26, in another embodiment of this application, the refrigeration device 100 includes a cylindrical body 822, a box body 823, and a door panel 824. The cylindrical body 822 has a first opening 221 that faces forward, and the box body 823 has an opening 231 that faces upward. The box body 823 is located inside the cylindrical body 822, and the door panel 824 is connected to the box body 823 and is used to open and close the first opening 221. The aforementioned refrigeration chamber 40 is formed by the cylindrical body 822 and the door panel 824.

[0402] The user can push and pull the door panel 824 to move the box body 823, allowing the box body 823 to enter and exit the interior of the cylinder 822 through the first opening 221. The aforementioned refrigeration compartment 40 is formed by the cylinder 822 and the door panel 824. The refrigeration equipment 100 also includes a cover plate 27 for closing the opening 231. The aforementioned preservation compartment 810 is formed by the box body 823 and the cover plate 27.

[0403] In this embodiment, the moisture permeable module 26 of the fresh food compartment 810 is provided on the cover plate 27, and the cover plate 27 is also provided with a structure similar to the air guide plate 25 described above.

[0404] An embodiment of this application also provides a control method for a refrigeration device. It should be noted that although this application provides method operation steps as shown in the following embodiments or flowcharts, the execution order of steps that do not have a necessary causal relationship in logic, based on conventional or non-creative labor, is not limited to the execution order provided in the embodiments of this application.

[0405] As shown in Figure 27, the control method for refrigeration equipment includes the following steps:

[0406] Obtain the temperature rise rate within the 810-degree preservation compartment;

[0407] Determine whether the heating rate has reached the heating threshold;

[0408] If the heating rate reaches the heating threshold, then a cooling airflow is supplied into the fresh food compartment 810.

[0409] If the heating rate does not reach the heating threshold, a cooling airflow is supplied to the periphery of the fresh food compartment 810.

[0410] If the heating rate exceeds the heating threshold, it indicates that the temperature inside the fresh food compartment 810 is rising too quickly. In this case, it is necessary to provide strong cooling to the fresh food compartment 810 by supplying cooling airflow into it. To supply cooling airflow into the fresh food compartment 810, the third damper 841 needs to be open. Thus, under the action of the fan 832, the cooling airflow in the cooling air supply path 840 can enter the fresh food compartment 810.

[0411] In addition, in this embodiment, the fresh-keeping compartment 810 is not completely sealed, and it has a moisture-permeable module 26, or, for example, in the structure shown in Figure 24, there is a gap between the door panel 824 and the cylinder 822. When a cooling airflow is supplied to the fresh-keeping compartment 810, the air inside the fresh-keeping compartment 810 can flow outward, thereby removing moisture from the fresh-keeping compartment 810 and preventing frost formation inside the fresh-keeping compartment 810.

[0412] In other embodiments, to allow air to flow out of the fresh-keeping compartment 810 when a cooling airflow is supplied to it, a ventilated door for opening and closing the fresh-keeping compartment 810 can be provided. When a cooling airflow is supplied to the fresh-keeping compartment 810, the ventilated door is open, the fresh-keeping compartment 810 is in a partially sealed state, and air can flow out of it; when it is not necessary to supply cooling airflow to the fresh-keeping compartment 810, the ventilated door is closed, making the fresh-keeping compartment 810 completely sealed.

[0413] To enhance the cooling effect of the fresh food compartment 810, if the heating rate exceeds the heating threshold, while supplying cooling air to the fresh food compartment 810, cooling air can also be supplied to the periphery of the fresh food compartment 810. In this way, the cooling air directly and indirectly cools the fresh food compartment 810, achieving a faster cooling effect.

[0414] If the heating rate does not exceed the heating threshold, it indicates that the temperature change inside the fresh-keeping compartment 810 is small. In this case, instead of strong cooling of the fresh-keeping compartment 810, cooling airflow is supplied to the periphery of the fresh-keeping compartment 810, i.e., the peripheral air passage 821, so that the cooling airflow indirectly and gently cools the fresh-keeping compartment 810. To supply cooling airflow to the periphery of the fresh-keeping compartment 810, the first damper 842 needs to be in the open state. In this way, under the action of the fan 832, the cooling airflow in the cooling air passage 840 can enter the peripheral air passage 821.

[0415] As can be imagined, in order to obtain the heating rate inside the fresh food compartment 810, the refrigeration equipment 100 also includes a temperature sensor, which may be located in a corner of the fresh food compartment 810.

[0416] In this embodiment, the temperature rise threshold ranges from 2 to 5°C / min, preferably 3°C / min.

[0417] The refrigeration equipment control method provided in this embodiment can select whether to directly supply refrigeration airflow into the refrigeration compartment 810 or supply refrigeration airflow to the outside of the refrigeration compartment 810 according to the temperature rise inside the refrigeration compartment 810. In this way, the food inside the refrigeration compartment 810 can be prevented from freezing and the refrigeration effect of the refrigeration compartment 810 can be guaranteed.

[0418] Further, as shown in Figure 28, in the control method, after determining that the heating rate has reached the heating threshold, it is then determined whether the cooling chamber 40 is in a cooling state. If the cooling chamber 40 is in a cooling state, the cooling components are working, and the cooling airflow in the cooling air supply path 840 is entering the cooling chamber 40 to cool it. If the cooling chamber 40 is in a non-cooling state, the cooling components are not working.

[0419] If the refrigeration chamber 40 is in a refrigeration state, a cooling airflow is supplied to the fresh food chamber 810 until the temperature in the fresh food chamber 810 reaches the predetermined value, after which the third air damper 841 is closed.

[0420] The fresh-keeping compartment 810 is located in the refrigeration compartment 40. When the refrigeration compartment 40 is in a refrigeration state, the temperature of the fresh-keeping compartment 810 will also decrease. Under these circumstances, supplying cooling airflow into the fresh-keeping compartment 810 can quickly reduce the temperature inside the fresh-keeping compartment 810. In addition, as mentioned above, both the cooling airflow entering the refrigeration compartment 40 and the cooling airflow entering the fresh-keeping compartment 810 flow out from the cooling air supply path 840. Only when the refrigeration compartment 40 is in a refrigeration state, that is, when the refrigeration components are working, can the temperature of the cooling airflow flowing out from the cooling air supply path 840 effectively reduce the temperature of the fresh-keeping compartment 810.

[0421] To enhance the cooling effect of the fresh food compartment 810, if the refrigeration compartment 40 is in a cooling state, while supplying cooling airflow to the fresh food compartment 810, it can also simultaneously supply cooling airflow to the periphery of the fresh food compartment 810.

[0422] If, after determining that the heating rate has reached the heating threshold, the cooling chamber 40 is not in a cooling state, it is necessary to further determine whether the temperature of the cooling chamber 40 has reached the cooling temperature. If the temperature of the cooling chamber 40 has reached the cooling temperature, it means that the temperature inside the cooling chamber 40 is currently high and cooling is required. If the temperature inside the cooling chamber 40 has not yet reached the cooling temperature, it means that the temperature inside the cooling chamber 40 is currently low and cooling is not currently required.

[0423] Specifically, when the temperature of the refrigeration chamber 40 reaches the refrigeration temperature, the refrigeration chamber 40 is refrigerated at the first refrigeration intensity, and a cooling airflow is supplied to the fresh-keeping chamber 810 until the temperature inside the fresh-keeping chamber 810 reaches the preset value. After that, the third air damper 841 closes. By adopting the above setting, on the one hand, the refrigeration chamber 40, where the fresh-keeping chamber 810 is located, is cooled down, and on the other hand, the interior of the fresh-keeping chamber 810 is directly cooled down, which can achieve a good cooling effect.

[0424] To enhance the cooling effect of the fresh food compartment 810, when the temperature of the cooling compartment 40 reaches the cooling temperature, while supplying cooling airflow to the fresh food compartment 810, cooling airflow can also be supplied to the periphery of the fresh food compartment 810 at the same time.

[0425] When the temperature of the refrigeration chamber 40 has not reached the refrigeration temperature, the refrigeration chamber 40 is refrigerated with the second refrigeration intensity, and refrigerated airflow is delivered into the fresh food compartment 810 until the temperature inside the fresh food compartment 810 reaches the preset value, and the second refrigeration intensity is less than the first refrigeration intensity.

[0426] As mentioned above, when the temperature of the cooling room 40 has not reached the cooling temperature, it means that the temperature inside the cooling room 40 is low. At this time, the cooling intensity of the cooling room 40 does not need to be too high. It is sufficient to cool the cooling room 40 with a second cooling intensity that is lower than the first cooling intensity.

[0427] To enhance the cooling effect of the fresh food compartment 810, when the temperature of the cooling compartment 40 has not reached the cooling temperature, while supplying cooling air to the fresh food compartment 810, cooling air can also be supplied to the periphery of the fresh food compartment 810 at the same time.

[0428] The cooling intensity of the cooling chamber 40 can be obtained by controlling the duty cycle of the fan 832. The larger the duty cycle of the fan 832, the more cooling airflow is delivered from the cooling air supply path 840 to the cooling chamber 40 per unit time, and the greater the cooling intensity of the cooling chamber 40. Conversely, the smaller the duty cycle of the fan 832, the smaller the cooling intensity of the cooling chamber 40.

[0429] For example, when cooling the cooling room 40 at the first cooling intensity, the duty cycle of the fan 832 is 100%, and when cooling the cooling room 40 at the second cooling intensity, the duty cycle of the fan 832 is 50% to 70%.

[0430] In this embodiment, under the action of the fan 832, the cooling airflow flows from the cooling air supply path 840 into the fresh food compartment 810. Therefore, the cooling intensity of the refrigeration equipment 100 on the cooling compartment 40 and the cooling intensity on the fresh food compartment 810 are related. If the cooling intensity on the cooling compartment 40 is small, the cooling intensity on the fresh food compartment 810 is also small, and if the cooling intensity on the cooling compartment 40 is large, the cooling intensity on the fresh food compartment 810 is also large.

[0431] Furthermore, in the control method, after determining that the heating rate has not reached the heating threshold, it is then determined whether the cooling chamber 40 is in a cooling state.

[0432] If the refrigeration chamber 40 is in a refrigeration state, then a cooling airflow is supplied to the periphery of the fresh food chamber 810, i.e., the peripheral air passage 821, until the temperature inside the fresh food chamber 810 reaches the preset value, and then the first air damper 842 is closed.

[0433] If it is determined that the heating rate has reached the heating threshold but the cooling room 40 is not in a cooling state, then it is necessary to determine whether the temperature of the cooling room 40 has reached the cooling temperature.

[0434] Specifically, when the temperature of the refrigeration chamber 40 reaches the refrigeration temperature, it indicates that the temperature inside the refrigeration chamber 40 is relatively high. At this point, the refrigeration chamber 40 is refrigerated at the third refrigeration intensity, and cooling airflow is supplied to the periphery of the fresh food compartment 810 until the temperature inside the fresh food compartment 810 reaches the preset value. After that, the first air damper 842 closes. By adopting the above settings, on the one hand, the refrigeration chamber 40, where the fresh food compartment 810 is located, is cooled down; on the other hand, cooling airflow is specifically supplied to the periphery of the fresh food compartment 810, thus effectively reducing the temperature inside the fresh food compartment 810.

[0435] If the temperature of the refrigeration chamber 40 has not reached the refrigeration temperature, the refrigeration chamber 40 can be refrigerated with the fourth refrigeration intensity, and the refrigeration airflow is delivered to the periphery of the fresh food chamber 810 until the temperature inside the fresh food chamber 810 reaches the preset value. The fourth refrigeration intensity is less than the third refrigeration intensity.

[0436] If the temperature inside the cooling room 40 has not reached the cooling temperature, it means that the temperature inside the cooling room 40 is not high. At this time, it is not advisable to cool excessively. It is sufficient to cool the cooling room 40 with a fourth cooling intensity that is lower than the third cooling intensity.

[0437] As mentioned above, the cooling intensity of the cooling room 40 can be obtained by controlling the duty cycle of the fan 832. The larger the duty cycle of the fan 832, the more cooling airflow is delivered from the cooling air supply path 840 to the cooling room 40 per unit time, and the greater the cooling intensity of the cooling room 40. Conversely, the smaller the duty cycle of the fan 832, the smaller the cooling intensity of the cooling room 40.

[0438] For example, when cooling room 40 is cooled at the third cooling intensity, the duty cycle of fan 832 is 100%, and when cooling room 40 is cooled at the fourth cooling intensity, the duty cycle of fan 832 is 50% to 70%.

[0439] As can be seen, in this embodiment, the first cooling intensity is equal to the third cooling intensity, and the second cooling intensity is equal to the third cooling intensity.

[0440] In this embodiment, under the action of the fan 832, the cooling airflow flows from the cooling air supply path 840 into the peripheral air path 821. Therefore, the cooling intensity of the refrigeration equipment 100 on the refrigeration chamber 40 and the cooling intensity on the periphery of the fresh-keeping chamber 810 are related. If the cooling intensity on the refrigeration chamber 40 is small, the cooling intensity on the periphery of the fresh-keeping chamber 810 is also small. If the cooling intensity on the refrigeration chamber 40 is large, the cooling intensity on the periphery of the fresh-keeping chamber 810 is also large.

[0441] The above describes how to achieve the preset temperature in the fresh food storage compartment 810. The control method for the refrigeration equipment 100 also includes the following steps:

[0442] Once the temperature inside the fresh food storage compartment 810 reaches the preset value, the oxygen adjustment module regulates the oxygen concentration inside the fresh food storage compartment 810.

[0443] Furthermore, after the temperature in the fresh-keeping compartment 810 reaches the preset value and the cooling of the refrigeration compartment 40 is completed, the oxygen adjustment module adjusts the oxygen concentration in the fresh-keeping compartment 810.

[0444] In this embodiment, the oxygen regulation module adjusts the oxygen concentration within the fresh-keeping compartment 810 to ensure that the oxygen concentration inside the compartment is lower than the atmospheric oxygen concentration, thus providing an oxygen-deficient environment. This oxygen-deficient environment inhibits the aerobic respiration of fruits and vegetables, reducing the consumption of sugars and other organic matter. It also minimizes anaerobic respiration, preventing the production of substances like alcohol that could negatively impact the quality of the fruits and vegetables.

[0445] In other embodiments, after adjusting the oxygen concentration in the fresh-keeping compartment 810, the oxygen-regulating module can also ensure that the oxygen concentration in the fresh-keeping compartment 810 is greater than the oxygen concentration in the atmosphere, that is, providing an oxygen-rich environment in the fresh-keeping compartment 810. This oxygen-rich environment can inhibit the growth and reproduction of anaerobic bacteria, and the higher oxygen concentration can combine with deoxymyoglobin on the surface of the muscle to form a thicker layer of oxymyoglobin, thereby maintaining the bright red color of the meat, improving the color stability of the meat, and thus enhancing the preservation effect of the meat.

[0446] The aforementioned "after the temperature inside the fresh-keeping compartment 810 reaches a preset value, the oxygen regulation module adjusts the oxygen concentration inside the fresh-keeping compartment 810" specifically refers to:

[0447] After the temperature in the fresh food storage compartment 810 reaches the preset value, if the downtime t of the oxygen regulation module reaches the preset downtime t1, or if the fresh food storage compartment 810 is opened and closed again, the oxygen regulation module adjusts the oxygen concentration in the fresh food storage compartment 810.

[0448] When the downtime t of the oxygen regulating module reaches the preset downtime, it means that the oxygen regulating module has not adjusted the oxygen concentration in the fresh food compartment 810 for a long time. At this time, the oxygen concentration in the fresh food compartment 810 is lower or higher than the limit value. Therefore, the oxygen regulating module needs to work to adjust the oxygen concentration in the fresh food compartment 810.

[0449] When the fresh food compartment 810 is opened, a large area of ​​the fresh food compartment 810 is exposed to the atmosphere. As a result, the oxygen concentration inside the fresh food compartment 810 will become similar to the concentration in the atmosphere. Therefore, after the fresh food compartment 810 is closed, the oxygen adjustment module needs to work to adjust the oxygen concentration inside the fresh food compartment 810.

[0450] Regarding the step of "obtaining the heating rate within the fresh food compartment 810; determining whether the heating rate has reached the heating threshold," it should be noted that if the heating rate within the fresh food compartment 810 reaches the heating threshold, it is generally because the user has opened the fresh food compartment 810 and placed or removed food. The longer the fresh food compartment 810 is open, and the higher the temperature of the food placed inside by the user, the easier it is for the heating rate within the fresh food compartment 810 to reach the heating threshold.

[0451] Since the temperature rise in the fresh food compartment 810 is generally caused by opening the fresh food compartment 810, the refrigeration equipment control method further includes the following step before the step "obtaining the temperature rise rate in the fresh food compartment 810": after the fresh food compartment 810 is opened, determine whether the fresh food compartment 810 is closed.

[0452] If so, proceed to step "obtain the heating rate within the fresh food compartment 810".

[0453] In the above embodiments, the need for cooling in the fresh-keeping compartment 810 is determined by detecting the rate of temperature rise. It is conceivable that the need for cooling in the fresh-keeping compartment 810 can also be determined by directly detecting its temperature. Therefore, another embodiment of this application provides a method for controlling a refrigeration device, which includes the following steps:

[0454] Obtain the preservation temperature inside the 810 preservation compartment;

[0455] Determine whether the preservation temperature has reached the temperature threshold;

[0456] If the preservation temperature reaches the temperature threshold, a cooling airflow is supplied into the preservation compartment 810.

[0457] If the preservation temperature does not reach the temperature threshold, a cooling airflow is supplied to the periphery of the preservation compartment 810.

[0458] As can be imagined, the "preservation temperature" in this embodiment can replace the "heating rate" in the above embodiment, and the "temperature threshold" in this embodiment can replace the "heating threshold" in the above embodiment.

[0459] The refrigeration equipment 100 also includes a storage module and a processing module. The storage module stores a computer program that can run on the processing module. When the processing module executes the program, it implements any one of the steps in the control method described above, that is, it implements any one of the steps in the control method of the refrigeration equipment described above.

[0460] [Third Embodiment]

[0461] Referring to Figures 29-37, the refrigeration equipment provided in this embodiment includes a fresh-keeping compartment, a cooling component, an oxygen regulation module 90, and a controller. The cooling component includes a refrigerator (e.g., an evaporator) for cooling the fresh-keeping compartment and an air duct connecting to the fresh-keeping compartment. The oxygen regulation module 90 is used to adjust the oxygen concentration in the fresh-keeping compartment, and the oxygen regulation module 90 also includes an oxygen regulation passage 930 connecting to the fresh-keeping compartment. The controller controls the refrigeration equipment to achieve a temperature control method for the fresh-keeping atmosphere, and the temperature control method for the fresh-keeping atmosphere includes the following steps:

[0462] During the operation of the oxygen regulation module 90, the temperature To of the oxygen regulation gas in the oxygen regulation path 930 and the temperature Tr of the preservation atmosphere in the preservation compartment are continuously monitored. When the difference between To or Tr and the initial temperature value at the start of the oxygen regulation module 90 exceeds a preset threshold, if Tr≥Tr(min)+n℃ and the refrigerator does not cool the preservation compartment, the cold air prepared by the refrigerator is transported to the preservation compartment through the air path, and the cold air flows through the outer wall of the oxygen regulation path 930 to exchange heat with the oxygen regulation gas in the oxygen regulation path 930.

[0463] In the refrigeration equipment provided in this application, when the temperature rise caused by the oxygen-controlled gas is detected to be greater than or equal to a preset threshold, the refrigerator is controlled to refrigerate the fresh food compartment when the temperature inside the fresh food compartment is n°C above the preset minimum temperature of the fresh food compartment, even if the refrigerator is not refrigerating the fresh food compartment, thereby reducing the temperature rise inside the fresh food compartment caused by the oxygen-controlled gas.

[0464] This application embodiment also provides a method for controlling the temperature of the preservation atmosphere in a refrigeration device, including the following steps:

[0465] When the oxygen conditioning module 90 is running to prepare oxygen conditioning gas, the temperature To of the oxygen conditioning gas in the gas path between the oxygen conditioning module 90 and the fresh food compartment, and the temperature Tr of the fresh food atmosphere in the fresh food compartment are monitored.

[0466] When the difference between To or Tr and the initial temperature value at the start of the oxygen control module 90 exceeds the preset threshold Ty, it is determined whether the cooler is running.

[0467] If yes, then determine whether the refrigerator is cooling the fresh food compartment. If not, then compare Tr with the preset minimum temperature Tr(min) of the fresh food compartment. If Tr≥Tr(min)+n℃, then control the cold air prepared by the refrigerator to be delivered to the fresh food compartment through the air duct, and the cold air flows through the outer wall of the air duct to exchange heat with the oxygen-conditioned gas in the air duct.

[0468] As shown in Figures 31 and 32, the oxygen regulation module 90 includes an outer shell 201 with a cavity 2011 and a housing 202 with an inner cavity 2021. The housing 202 is disposed in the cavity 2011. The oxygen regulation module 90 also includes an electrode 203, 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.

[0469] Thus, when the controller controls the oxygen regulating module 90 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 90; and when the controller controls the oxygen regulating module 90 to stop, under the control of the controller, the positive terminal of the power supply is disconnected from the anode and the negative terminal of the power supply is disconnected from the cathode, that is, the power supply stops supplying power to the oxygen regulating module 90.

[0470] The first side of the cathode is exposed in the inner cavity 2021, and the second side is exposed to the external air of the oxygen control module 90.

[0471] When the oxygen regulating module 90 is running, i.e., when it is energized, the cathode is used to consume oxygen from 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, oxygen-deficient oxygen-regulating gas can be formed outside the oxygen regulation module 90.

[0472] One or both sides of the anode are exposed in the inner cavity 2021. The anode is used to generate oxygen in the inner cavity 2021 through an electrochemical reaction to form an oxygen-enriched gas. 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 form oxygen-enriched gas.

[0473] In the refrigeration equipment, as shown in Figure 33, the oxygen-regulating module 90 and the fresh-keeping compartment are connected via an oxygen-regulating passage 930. The oxygen-regulating gas generated by the oxygen-regulating module 90 enters the fresh-keeping compartment through the oxygen-regulating passage 930. The oxygen-regulating module 90 generates heat during operation, which enters the fresh-keeping compartment along with the oxygen-regulating gas. Therefore, it is necessary to control the temperature in the fresh-keeping compartment. The temperature control method for the fresh-keeping atmosphere in the refrigeration equipment provided in this application targets the temperature control within the fresh-keeping compartment to control the impact of the heat carried by the oxygen-regulating gas on the temperature rise of the fresh-keeping compartment.

[0474] When the oxygen control module 90 starts working, it means that the oxygen control module 90 begins to generate heat, and the heat will enter the fresh-keeping compartment along with the oxygen control gas through the oxygen control passage 930. Temperature monitoring begins as soon as the oxygen control module 90 starts, and the monitoring location is either in the oxygen control passage 930 or inside the fresh-keeping compartment. When the monitoring location is in the oxygen control passage 930, the temperature To of the oxygen control gas in the oxygen control passage 930 is monitored, and the temperature sensor is usually set at the end of the oxygen control passage 930 closer to the fresh-keeping compartment. When the monitoring location is in the fresh-keeping compartment, the temperature Tr of the fresh-keeping atmosphere inside the fresh-keeping compartment is monitored.

[0475] If the temperature To of the oxygen-controlled gas in the oxygen-controlled gas path 930 or the temperature Tr of the preservation atmosphere in the preservation compartment rises by a value greater than or equal to the preset threshold Ty, it indicates that the heat carried by the oxygen-controlled gas is too high and exceeds the allowable range. This heat may cause a significant temperature rise in the preservation compartment. If the first evaporator is cooling but not the preservation compartment, and the temperature Tr of the preservation atmosphere in the preservation compartment is more than n°C higher than the preset minimum temperature of the preservation compartment, it indicates that the oxygen-controlled gas carries a lot of heat and needs to be cooled to prevent the preservation compartment from continuing to rise in temperature. Therefore, the cold air prepared by the refrigerator is controlled to be delivered to the preservation compartment for cooling. At the same time, the cold air is also allowed to flow through the outer wall of the oxygen-controlled gas path 930, and the cold air can exchange heat with the oxygen-controlled gas in the oxygen-controlled gas path 930, thereby cooling the oxygen-controlled gas during the process of delivering the cold air to the preservation compartment.

[0476] When the fresh food compartment receives enough cooling capacity to lower the temperature Tr of the fresh food atmosphere inside the fresh food compartment to the preset minimum temperature Tr(min) of the fresh food compartment, the first evaporator can be stopped from providing cooling capacity to the fresh food compartment to prevent the temperature of the fresh food compartment from dropping too much and falling below the preset value.

[0477] In one embodiment, controlled oxygen gas enters a drawer located inside the cylinder, and controlled cold air enters the cylinder outside the drawer. As shown in Figures 34-36, the specific structure of this preservation compartment can also be referred to Figures 2 to 10 of the first embodiment above.

[0478] Specifically, the refrigeration equipment includes a first cylindrical body 711 with its opening facing forward, a first drawer 720 disposed inside the first cylindrical body 711, and a cover 730 covering the top of the first drawer 720. The first drawer 720 includes a first door panel 724, which completely covers the front opening of the first cylindrical body 711. A preservation compartment 710 is formed between the first cylindrical body 711 and the first door panel 724.

[0479] A sealed space, the first drawer 720 and the lid 730, forms a fresh-keeping compartment 7101. Another sealed space, the first cylindrical body 711, the first drawer 720, and the lid 730, form a second fresh-keeping compartment 7102. In other words, the first drawer 720 and the lid 730 divide the fresh-keeping compartment 710 into two spaces: inside and outside the drawer. Oxygen-controlled gas enters the first drawer 720 (fresh-keeping compartment 7101), while cold air enters the outside of the first drawer 720 (fresh-keeping compartment 7102). The cold air is radiated into the drawer 720 through the first drawer 720 and the lid 730, cooling the air inside the drawer.

[0480] Specifically, an air outlet 11 is provided at the top of the rear side of the first cylinder 711, and a return air outlet 12 is provided at the bottom. The first door panel 724 is connected to the front end of the first drawer 720, as shown in Figure 36. A gap is formed between the first door panel 724 and the first drawer 720. Cold air enters the second zone 7102 of the preservation compartment from the air outlet 11, flows through the cover 730, and then flows from top to bottom of the first drawer 720 through the gap between the first drawer 720 and the first door panel 724, and then flows out from the return air outlet 12 to complete the circulation.

[0481] In one embodiment, the specific structure shown in Figures 34 and 37 is as follows, and the specific structure of the preservation compartment can also be referred to Figures 11 to 17 of the first embodiment above.

[0482] Specifically, the refrigeration equipment includes a receiving chamber enclosed by a cover plate and an air duct cover plate, a second cylindrical body 721 located within the receiving chamber with its opening facing forward, and a second drawer 722 disposed within the second cylindrical body 721. The second drawer 722 includes a second door panel 7221, which completely covers the front opening of the second cylindrical body 721. The front end of the second cylindrical body 721 is connected to the inner wall of the front end of the receiving chamber. The second cylindrical body 721 and the second door panel 7221 form a sealed space, which is the fresh-keeping compartment 7101; the portion of the receiving chamber outside the second cylindrical body 721 forms another sealed space, which is the second fresh-keeping compartment 7102. Oxygenated gas enters the fresh-keeping compartment 7101, and cold air enters the second fresh-keeping compartment 7102, radiating cold energy into the drawer through the second cylindrical body 721 to cool the air inside the drawer. This can also be considered as cold air being supplied to the outside of the fresh-keeping compartment.

[0483] In some embodiments, when the temperature To of the oxygen-conditioned gas in the gas path is monitored, if the refrigerator does not cool, it is determined whether Tr(min)≤Tr≤Tr(min)+n℃ is true. If so, the fan is controlled to blow the residual cold of the refrigerator to the preservation room with a preset duty cycle.

[0484] When the oxygen-controlled gas in the oxygen-controlled gas circuit 930 is used as the standard for judging the temperature rise, the temperature Tr of the preservation atmosphere in the preservation room is monitored to determine the effect of the heat carried by the oxygen-controlled gas on the temperature of the preservation atmosphere in the preservation room.

[0485] When the refrigeration unit is not cooling, and the temperature Tr of the preservation atmosphere in the preservation room satisfies Tr(min)≤Tr≤Tr(min)+n℃, the preservation room cannot directly obtain the cooling capacity prepared by the refrigeration unit because the refrigeration unit is not cooling. At this time, the oxygen-conditioned gas is continuously entering the preservation room, causing the temperature in the preservation room to rise. Therefore, the only way to maintain the temperature Tr of the preservation atmosphere in the preservation room is to use the fan to blow the residual cold generated by the refrigeration unit to the preservation room in order to prevent the temperature of the preservation atmosphere in the preservation room from being affected by the heat carried by the oxygen-conditioned gas and thus rising.

[0486] In some embodiments, when the oxygen-conditioned gas in the oxygen-conditioned gas path 930 is used as the standard for judging the temperature rise, the preset threshold Ty ≥ 3℃ is set.

[0487] In some embodiments, the preset duty cycle is 50-75%, and the temperature Tr of the preservation atmosphere in the preservation room is in the range of the preset minimum temperature Tr(min) of the preservation room to the preset minimum temperature Tr(min)+n℃. The higher Tr is, the higher the duty cycle is.

[0488] Within the range of the preset minimum temperature Tr(min) to the preset minimum temperature Tr(min)+n℃ in the fresh food storage room, the higher the temperature Tr of the fresh food storage atmosphere in the fresh food storage room, the more cooling capacity is required, and the larger the duty cycle, the higher the fan speed, which can bring more cooling capacity.

[0489] In some embodiments, the cooler is a first evaporator, that is, the refrigeration system in the refrigeration equipment is a common structure including a compressor, condenser, evaporator, etc. If the oxygen regulating gas in the oxygen regulating circuit 930 is used as the standard for judging the temperature rise, when the first evaporator is not cooling, the judgment condition is negative, that is, Tr > Tr(min) + n℃ (when Tr < Tr(min), the temperature is too low and no cooling is needed), then it is judged whether the compressor should be started. If the compressor is not started, the compressor is immediately started to make the first evaporator cool to supply cooling for the fresh food compartment; if the compressor is started, the first evaporator is immediately controlled to cool to supply cooling for the fresh food compartment after the second evaporator, which is cooling for the freezer compartment, finishes cooling.

[0490] In addition to the fresh-keeping compartment, the refrigeration equipment also includes conventional cold storage compartments and freezer compartments, and may also include a variable-temperature compartment. In addition to the first evaporator, it also includes a second evaporator for cooling the freezer compartment and / or the variable-temperature compartment. A solenoid valve is installed between the first evaporator and the second evaporator to switch the flow of refrigerant, or in other words, to switch the cooling of the first evaporator and the second evaporator.

[0491] If the temperature Tr of the preservation atmosphere inside the fresh food storage compartment is greater than the preset minimum temperature Tr(min) + n℃, it indicates that the temperature Tr of the preservation atmosphere inside the fresh food storage compartment is too high, requiring more cooling capacity. If the compressor is in a stopped state at this time, the compressor will be started immediately and will supply refrigerant to the first evaporator, causing the first evaporator to start cooling and providing cooling capacity to the fresh food storage compartment to lower the temperature.

[0492] If the compressor is working at this time, but the first evaporator is not cooling, that is, the compressor is supplying refrigerant to the second evaporator for cooling the freezer compartment and / or the variable temperature compartment, then it is necessary to wait for the freezer compartment and / or the variable temperature compartment to finish cooling before immediately switching the solenoid valve to make the first evaporator cool and provide cooling capacity to the fresh food compartment.

[0493] In some embodiments, when the temperature Tr of the preservation atmosphere is monitored, if the refrigerator does not cool, it is determined whether the temperature Tr of the refrigerator compartment with the preservation compartment meets the preset minimum temperature Tr(min) ≤ Tr < preset minimum temperature Tr(min) + m℃ of the refrigerator compartment. If so, the fan is controlled to blow the residual cold of the refrigerator to the preservation compartment with a certain duty cycle.

[0494] As mentioned above, the fresh-keeping compartment is located inside the refrigeration compartment. Therefore, the temperatures in the fresh-keeping and refrigeration compartments influence each other. When the first evaporator is not cooling, the temperatures in both the fresh-keeping and refrigeration compartments gradually rise. When the temperature of the oxygen-controlled gas entering the fresh-keeping compartment rises, it will transfer some heat to the refrigeration compartment outside the cylinder, causing the temperature in the refrigeration compartment to rise. When the temperature Tr in the refrigeration compartment is within m℃ above the preset minimum temperature of the refrigeration compartment, the temperature Tr of the fresh-keeping gas in the fresh-keeping compartment is higher, requiring cooling. However, the refrigeration unit is not cooling, and can only control the fan to operate at a preset duty cycle to blow the residual coolant from the refrigeration unit into the fresh-keeping compartment.

[0495] Where n > m, the fresh food storage room is located inside the cold storage room. The temperature Tr inside the cold storage room is affected by the temperature inside the fresh food storage room and rises. Therefore, the temperature of the fresh food storage room will be higher than that of the cold storage room. Thus, in terms of judgment conditions, the temperature of the cold storage room needs to be lower.

[0496] In some embodiments, the preset duty cycle is 50-75%, and the temperature Tr inside the refrigerator is in the range of the preset minimum temperature Tr(min) of the refrigerator to the preset minimum temperature Tr(min) + m℃. The higher Tr is, the higher the duty cycle is.

[0497] In some embodiments, when monitoring the temperature Tr of the preservation atmosphere, the preset threshold Ty is ≥ 1℃. After the oxygen-conditioned gas enters the preservation chamber, the heat carried by the oxygen-conditioned gas is dispersed in the preservation chamber, and has little impact on the temperature fluctuation of the preservation chamber. Therefore, the preset threshold Ty is smaller when monitoring the temperature To of the oxygen-conditioned gas in the gas path, while the preset threshold Ty is larger when monitoring the temperature Tr of the preservation atmosphere.

[0498] In some embodiments, if the temperature Tr of the preservation atmosphere is used as the standard for judging the temperature rise, when the first evaporator is not cooling, if the judgment condition is negative, i.e. Tr≥Tr(min)+m℃, then it is determined whether the compressor is started. If the compressor is not started, the compressor is started immediately to make the first evaporator cool to supply cooling for the preservation room; if the compressor is started, the first evaporator is immediately controlled to cool to supply cooling for the preservation room after the second evaporator, which is cooling for the freezer room, finishes cooling.

[0499] When the temperature Tr inside the refrigerator compartment is greater than or equal to the preset minimum temperature Tr(min) + m℃, it indicates that the first evaporator has been off cooling for a relatively long time. This means that the refrigerator and fresh-keeping compartments have not been cooling for an extended period, and their temperatures are gradually rising. Furthermore, due to the heat carried by the oxygen-controlled gas, the temperature in the fresh-keeping compartment will be higher, requiring more cooling capacity. If the compressor is off at this time, it should be immediately started to supply refrigerant to the first evaporator, allowing the first evaporator to begin cooling and providing cooling capacity to the fresh-keeping compartment to lower its temperature.

[0500] If the compressor is working at this time, but the first evaporator is not cooling, that is, the compressor is supplying refrigerant to the second evaporator for cooling the freezer compartment and / or the variable temperature compartment, then it is necessary to wait for the freezer compartment and / or the variable temperature compartment to finish cooling before immediately switching the solenoid valve to make the first evaporator cool and provide cooling capacity to the fresh food compartment.

[0501] In some embodiments, if the first evaporator reaches the maximum cooling time, Tr≥Tr(min)+1℃, the oxygen regulating damper is controlled to remain open and operate at a 50% duty cycle.

[0502] In addition to starting and stopping refrigeration based on the preset maximum and minimum temperatures in the refrigeration and / or preservation compartments, the first evaporator is also set with a maximum refrigeration time. If the first evaporator reaches its maximum refrigeration time, but the temperature Tr of the preservation atmosphere in the preservation compartment is still too high, exceeding the preset minimum temperature Tr(min) of the preservation compartment by 1°C, it indicates that the oxygen-controlled gas carries too much heat, causing the temperature in the preservation compartment to rise too much and not be fully reduced by the first evaporator. In this case, after the first evaporator stops refrigerating, the fan needs to continue working to blow the residual cold generated during the first evaporator's refrigeration into the preservation compartment for cooling.

[0503] Furthermore, in the various embodiments described above in this application, the processing module can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. The general-purpose processor can be a microprocessor or any conventional processor. The processing module is the control center of the refrigeration equipment, connecting various parts of the entire refrigeration equipment through various interfaces and lines.

[0504] The storage module can be used to store the computer programs and / or modules. The processing module implements various functions of the refrigeration equipment by running or executing the computer programs and / or modules stored in the storage module and by calling the data stored in the storage module. The storage module may mainly include a program storage area and a data storage area. The program storage area may store the operating system, at least one application program required for a function, etc. In addition, the storage module may include high-speed random access memory, and may also include non-volatile memory, such as hard disk, RAM, plug-in hard disk, smart media card (SMC), secure digital (SD) card, flash card, at least one disk storage device, flash memory device, or other volatile solid-state storage device.

[0505] For example, the computer program may be divided into one or more modules / units, which are stored in a storage module and executed by a processing module to complete this application. The one or more modules / units may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in a refrigeration device.

[0506] Furthermore, one embodiment of this application provides a readable storage medium storing a computer program that, when executed by a processing module, can implement the steps in the control method for the refrigeration equipment described above.

[0507] If the integrated module of the control method for the refrigeration equipment is implemented as a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the methods of the above embodiments can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by the processing module, it can implement the steps of the various method embodiments described above.

[0508] The computer program includes computer program code, which can be in the form of source code, object code, executable file, or some intermediate form. The computer-readable medium can include any entity or device capable of carrying the computer program code, recording media, U disks, portable hard drives, magnetic disks, optical disks, computer memory, read-only memory (ROM), random access memory (RAM), electrical carrier signals, telecommunication signals, and software distribution media, etc. It should be noted that the content included in the computer-readable medium can be appropriately added or removed according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electrical carrier signals and telecommunication signals.

[0509] 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.

[0510] The detailed descriptions listed above are merely specific descriptions of feasible implementation methods of this application and are not intended to limit the scope of protection of this application. All equivalent implementation methods or modifications made without departing from the spirit of the art of this application should be included within the scope of protection of this application.

Claims

1. A refrigeration device, characterized in that, include: Fresh food storage room; A cooling air supply path is provided, which is connected to the refrigeration system and supplies cold air to the outside of the fresh food compartment. An oxygen control module is used to adjust the oxygen concentration inside the preservation room. A moisture-permeable module is used to adjust the humidity difference between the preservation compartment and its outside.

2. The refrigeration equipment according to claim 1, characterized in that, A groove is provided on the top wall of the preservation chamber, and the moisture permeation module is housed in the groove. The cold air from the cold air supply path blows across the upper surface of the moisture permeation module.

3. The refrigeration equipment according to claim 2, characterized in that, The cooling air supply path includes an air outlet, and multiple air guide plates are provided on the top wall. The multiple air guide plates are arranged opposite to the air outlet, and the multiple air guide plates guide the cooling air to cover multiple directions of the moisture permeable module.

4. The refrigeration equipment according to claim 3, characterized in that, The plurality of air guide plates include a left air guide plate, a right air guide plate and several intermediate air guide plates. A left air path is formed between the left air guide plate and one of the intermediate air guide plates, and a right air path is formed between the right air guide plate and one of the intermediate air guide plates. The air volume of the left air path and the right air path is basically the same.

5. The refrigeration equipment according to claim 4, characterized in that, The middle air guide plate extends in the front-to-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.

6. The refrigeration equipment according to claim 4, characterized in that, The refrigeration equipment also includes a temperature sensor, which is located on the outside of the top wall. The left or right air guide plate separates the temperature sensor from the cold air in the cooling air supply path.

7. The refrigeration equipment according to claim 5, characterized in that, A side air outlet is provided at the end of the left air guide plate and / or the right air guide plate away from the air outlet. An air guide wall is provided on the side wall of the fresh food compartment. A return air cavity is provided below the fresh food compartment. The cold air supply path includes a return air inlet. Cold air blown out from the side air outlet passes through the air guide wall and the return air cavity in sequence and is blown to the return air inlet.

8. The refrigeration equipment according to claim 1, characterized in that, The refrigeration equipment also includes a cylinder and a drawer disposed within the cylinder. The fresh-keeping compartment includes a forward opening, and the drawer has an upward opening. When the drawer is located within the cylinder, the drawer and the door frame of the cylinder are sealed and abutted by a first sealing ring. The preservation chamber is defined by the cylinder, and the moisture-permeable module is disposed on the cylinder.

9. The refrigeration equipment according to claim 8, characterized in that, The fresh-keeping compartment includes an air outlet and a first air return port. The drawer includes a second air inlet and a second air return port. The oxygen control module supplies air to the air outlet, and the air passes through the second air inlet, the second air return port, and the first air return port in sequence before returning to the oxygen control module.

10. The refrigeration equipment according to claim 9, characterized in that, The oxygen regulation module includes an air outlet and a third air return port, both of which face the bottom wall of the preservation compartment. The rear wall of the preservation compartment is provided with an oxygen regulating passage. The oxygen regulating passage includes an air groove, a third sealing ring and a back plate disposed on the rear wall. The back plate abuts against the third sealing ring with the rear wall. One end of the air groove extends to the air outlet and the other end extends to the air outlet in the middle of the rear wall.

11. The refrigeration equipment according to claim 8, characterized in that, The moisture-permeable module is disposed on the top wall or rear wall of the cylinder.

12. The refrigeration equipment according to claim 1, characterized in that, The oxygen regulation module is used to increase the oxygen concentration inside the preservation room to a level higher than the outside oxygen concentration, or to decrease the oxygen concentration inside the preservation room to a level lower than the outside oxygen concentration.

13. The refrigeration equipment according to claim 1, characterized in that, The refrigeration equipment also includes a cylinder, a drawer disposed in the cylinder, and a cover plate. The fresh-keeping compartment includes a forward opening, the drawer includes a door panel and an upward opening, the cover plate closes the opening, and the door panel closes the opening when the drawer is located in the cylinder. The fresh-keeping compartment is defined by the drawer and the cover, and the moisture-permeable module is disposed on the cover.

14. The refrigeration equipment according to claim 13, characterized in that, An air outlet is provided at the rear of the cylinder; The cooling air supply path is connected to the air outlet; The drawer also includes a front cover, and an air duct is formed between the door panel and the front cover; A cold air cavity is formed between the cover plate and the top wall of the cylinder. The humidity difference between the preservation chamber and the cold air cavity is adjusted by the moisture permeation module. 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.

15. The refrigeration equipment according to claim 14, characterized in that, A return air vent is provided at the rear of the cylinder. A return air cavity is formed between the first bottom plate of the drawer and the bottom wall of the cylinder. The return air vent faces the return air cavity. The airflow blown out of the air outlet passes sequentially through the cold air cavity, the interlayer air passage and the return air cavity before being blown to the return air vent.

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

17. The refrigeration equipment according to claim 1, characterized in that, The refrigeration equipment includes: The inner liner has a refrigeration compartment formed therein, and the fresh-keeping compartment is located in the refrigeration compartment; A cooling unit is used to supply cold energy to the fresh-keeping compartment and the refrigeration compartment. The cooling unit refrigerates the fresh-keeping compartment in the first operating state. A humidity sensor is used to continuously monitor the temperature of the fresh food compartment and the temperature of the refrigeration compartment during the operation of the oxygen regulation module, wherein the oxygen regulation module is used to adjust the oxygen concentration in the fresh food compartment. The processing module is used to switch the cooling component to the first operating state when the temperature of the refrigeration chamber is lower than the high temperature threshold for refrigeration and the temperature of the fresh-keeping chamber is higher than the oxygen-regulating temperature threshold.

18. A control method for the refrigeration equipment according to claim 1, characterized in that, Includes the following steps: During the operation of the oxygen regulation module, the temperature of the fresh food compartment and the temperature of the refrigeration compartment are continuously monitored. The oxygen regulation module is used to adjust the oxygen concentration in the fresh food compartment, and the cooling component is used to supply the cooling capacity generated by the refrigeration system to the fresh food compartment and the refrigeration compartment. The cooling component cools the fresh food compartment in the first operating state. When the temperature of the refrigeration chamber is lower than the high-temperature threshold for refrigeration and the temperature of the preservation chamber is higher than the oxygen-regulating temperature threshold, the refrigeration system stops and the cooling component switches to the first operating state.

19. The control method for the refrigeration equipment according to claim 18, characterized in that, Includes the following steps: The humidity of the fresh food storage compartment is continuously monitored. The humidity difference between the fresh food storage compartment and the refrigeration compartment is adjusted by the moisture permeation module. When the cooling component is in the first operating state, the cold air from the refrigeration system is blown through the moisture permeation module. When the humidity of the fresh food storage room is greater than the first humidity threshold, it is determined whether the temperature of the fresh food storage room is lower than the fresh food temperature threshold. If the temperature of the preservation chamber is lower than the preservation temperature threshold, after the refrigeration system is shut down and a preset time has elapsed, the cooling component switches to the first operating state.

20. A control method for the refrigeration equipment according to claim 1, characterized in that, Includes the following steps: When the oxygen-regulating module is running to prepare oxygen-regulating gas, the temperature To of the oxygen-regulating gas in the oxygen-regulating circuit between the oxygen-regulating module and the fresh-keeping room, and the temperature Tr of the fresh-keeping atmosphere in the fresh-keeping room are monitored. When the difference between To or Tr and the initial temperature value at the start of the oxygen control module exceeds the preset threshold Ty, it is determined whether the cooler is running. If yes, then determine whether the refrigerator is cooling the fresh food compartment. If not, then compare Tr with the preset minimum temperature Tr(min) of the fresh food compartment. If Tr≥Tr(min)+n℃, then control the cold air prepared by the refrigerator to be transported to the fresh food compartment through the air duct, and the cold air flows through the outer wall of the oxygen regulating duct to exchange heat with the oxygen regulating gas in the oxygen regulating duct.

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