Vacuum fresh-keeping device, control method, refrigerator, and computer-readable storage medium

Abstract

The application discloses a vacuum fresh-keeping device, a control method, a refrigerator and a computer readable storage medium. The vacuum fresh-keeping device comprises: a vacuum fresh-keeping chamber for placing food materials and being connected with a refrigeration circulating air duct and a fresh-keeping circulating air duct; a vacuum pump arranged on the fresh-keeping circulating air duct and used for pumping out air or driving air circulation between the fresh-keeping circulating air duct and the vacuum fresh-keeping chamber; and a first control valve arranged at an outlet end of the fresh-keeping circulating air duct and used for opening and closing the fresh-keeping circulating air duct, and an interface for connecting the outside world is further arranged. The vacuum fresh-keeping device is of a continuous air pumping type, the whole system can continuously operate without interruption, that is, air is continuously pumped out and air is continuously input in equal amounts, the pressure is kept constant, and the food materials can be kept in a constant low pressure and humid fresh gas at all times.

Description

Technical Field

[0001] This invention relates to the field of vacuum preservation technology for refrigerators, and in particular to a vacuum preservation device, control method, refrigerator, and computer-readable storage medium. Background Technology

[0002] As people's living standards improve, their demands for the freshness of food are also increasing. Refrigerators are the most commonly used household appliances for food storage, and there are many technologies to meet the needs of food freshness storage, among which vacuum preservation technology is one.

[0003] The principle of vacuum preservation in refrigerators is to use a miniature vacuum pump to remove some of the gas from the sealed food storage space (drawer / box), creating a partial vacuum inside the storage space. This reduces the internal gas partial pressure, lowers the oxygen concentration, and thus creates a low-oxygen environment, extending the storage period of food. Existing refrigerators with vacuum preservation functions control the vacuum level using a periodic (static) extraction method. A pressure value is preset, and extraction stops once the required vacuum level is reached in the decompression chamber. Summary of the Invention

[0004] In order to solve the technical problem in the prior art that the refrigerator's crisper compartment cannot be circulated after being vacuumed, the present invention proposes a vacuum crisper device, a control method, a refrigerator, and a computer-readable storage medium.

[0005] The technical solution adopted in this invention is:

[0006] This invention proposes a vacuum preservation device, comprising:

[0007] The vacuum preservation chamber is used to place food and is connected to the refrigeration circulation duct and the preservation circulation duct.

[0008] A vacuum pump is installed on the fresh-keeping circulation duct to create a vacuum and exhaust air to the outside, or to drive the fresh-keeping circulation duct to circulate air with the vacuum fresh-keeping chamber.

[0009] The first control valve is located at the outlet end of the fresh-keeping circulating air duct and has an interface for connecting to the outside world. It can open and close the fresh-keeping circulating air duct and the interface for connecting to the outside world.

[0010] The control system controls the operating status of the refrigeration system corresponding to the cold circulation duct, the operating status of the vacuum pump assembly, and controls the opening and closing of the first control valve of the preservation circulation duct or the opening and closing of the interface connecting to the outside world, based on the type of food information.

[0011] The fresh-keeping circulating air duct is equipped with an atomizing humidifier and an air purifier controlled by the control system.

[0012] The vacuum preservation device also includes: a pressure sensor for detecting the pressure of the vacuum preservation chamber, a temperature sensor for detecting the temperature of the vacuum preservation chamber, a humidity sensor for detecting humidity, and an infrared thermometer for detecting the internal temperature of the food.

[0013] The present invention also proposes a refrigerator, including the above-mentioned vacuum preservation device.

[0014] Furthermore, the vacuum preservation device is installed in the compartment of the refrigerator, and the refrigeration circulation duct is the refrigeration circulation duct of the refrigerator.

[0015] This invention also proposes a vacuum preservation control method, using the aforementioned vacuum preservation device, comprising the following steps:

[0016] Select to enable the vacuum preservation function;

[0017] Obtain the information on the type of food selected by the user, and determine the set temperature Tm, the first vacuum degree Pm1, and the maintenance vacuum degree Pm2 of the vacuum preservation chamber based on the information on the type of food.

[0018] The internal temperature Ts of the food, the temperature T of the vacuum preservation chamber, and the vacuum degree P of the vacuum preservation chamber were measured.

[0019] The operating status of the refrigeration system corresponding to the refrigeration circulation duct is controlled according to the detected temperature, and the operating status of the vacuum pump and the opening and closing status of the first control valve are controlled according to the detected temperature and the detected vacuum degree.

[0020] Furthermore, the step of controlling the operating state of the vacuum pump and the opening / closing state of the first control valve based on the detected temperature and detected vacuum level specifically includes the following steps:

[0021] The vacuum pump operates at its rated speed to draw a vacuum and expel air.

[0022] Determine whether the following conditions hold true: P≤Pm1, T≤Tm, and Ts=T;

[0023] If so, control the vacuum pump to stop running, open the interface of the first control valve to connect to the outside until the vacuum degree of the vacuum preservation chamber P = Pm2, close the interface of the first control valve to connect to the outside, and control the vacuum pump to run at a preset low speed to drive the air circulation of the preservation circulation duct and the vacuum preservation chamber.

[0024] If not, return to the step of determining whether P≤Pm1, T≤Tm, and Ts=T are true.

[0025] Furthermore, after controlling the vacuum pump to operate at a preset low speed, the process also includes the following steps:

[0026] The humidity S of the vacuum preservation chamber is detected;

[0027] Determine if the humidity S in the vacuum preservation chamber is less than the preset humidity Sm corresponding to the type of food selected by the user. If yes, turn off the atomizing humidifier; otherwise, turn on the atomizing humidifier.

[0028] Furthermore, the step of controlling the operating status of the refrigeration system corresponding to the refrigeration circulation duct based on the detected temperature specifically includes the following steps:

[0029] Turn on the vacuum preservation function, the refrigeration system will start, and open the air damper;

[0030] Detect the temperature T of the vacuum preservation chamber and the internal temperature Ts of the food;

[0031] Determine whether T≤Tm and Ts=T are true; if yes, close the damper; if no, return to the steps of detecting the temperature T of the vacuum preservation chamber and the internal temperature Ts of the food.

[0032] When the vacuum preservation function is selected to be deactivated, the vacuum pump is stopped, the interface connecting the first control valve to the outside is opened, until the vacuum degree P of the vacuum preservation chamber is equal to atmospheric pressure.

[0033] The present invention also proposes a computer-readable storage medium for storing a computer program, which executes the above-described vacuum preservation control method when running.

[0034] Compared with existing technologies, the vacuum preservation device proposed in this invention adopts a continuous air extraction type, and the entire system operates continuously without interruption. That is, it continuously extracts and inputs air in equal amounts to maintain constant pressure, which can ensure that the food is always in a constant low-pressure and humid fresh gas environment.

[0035] The refrigeration system independently controls the temperature of the vacuum chamber, ensuring that the vacuum chamber maintains the required storage temperature for the product and can also meet the vacuum storage requirements of different products. Attached Figure Description

[0036] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0037] Figure 1 This is a schematic diagram of the structure in an embodiment of the present invention;

[0038] Figure 2 This is a flowchart illustrating the vacuum preservation process in an embodiment of the present invention;

[0039] Figure 3 This is a flowchart illustrating the process of exiting vacuum preservation in an embodiment of the present invention;

[0040] 1. Control system; 11. Pressure sensor; 12. Temperature sensor; 13. Humidity sensor; 14. Infrared thermometer;

[0041] 2. Vacuum preservation compartment;

[0042] 3. Vacuum purification system;

[0043] 31. Vacuum pump; 32. Second control valve; 33. Air purifier; 34. Third control valve; 35. Atomizing humidifier; 37. First control valve; 36. Fourth control valve;

[0044] 4. Refrigeration system;

[0045] 41. Compressor; 42. Condenser; 43. Dryer filter; 44. Capillary tube; 45. Evaporator; 46. Refrigeration circulation duct; 47. Damper. Detailed Implementation

[0046] To make the technical problems to be solved, the technical solutions, and the beneficial effects of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention.

[0047] The principles and structure of the present invention will be described in detail below with reference to the accompanying drawings and embodiments.

[0048] The principle of vacuum preservation in refrigerators is to use a miniature vacuum pump to remove a portion of the gas from the sealed food storage space (drawer / box), creating a partial vacuum inside the storage space. This reduces the internal gas partial pressure, lowers the oxygen concentration, and thus creates a low-oxygen environment, extending the storage period of food. Existing refrigerators with vacuum preservation functions control the vacuum level through periodic evacuation (static). A pressure value is preset, and evacuation stops once the required vacuum level is reached in the decompression chamber. While this method promotes the diffusion of volatile components from the food, it cannot continuously expel these substances to the decompression chamber, failing to guarantee the freshness of the air inside the vacuum preservation chamber. To address this, this invention proposes a vacuum preservation device with multiple vacuuming modes and a continuous evacuation system. The entire system operates continuously, maintaining a constant pressure.

[0049] like Figure 1 As shown, the present invention proposes a vacuum preservation device, specifically comprising:

[0050] The refrigerator comprises a vacuum preservation chamber 2, a vacuum pump 31, a first control valve 37, and a control system. The vacuum preservation chamber is used to place food to be preserved. Its back side is connected to a refrigeration circulation duct, and its left or right side is connected to a preservation circulation duct (which can be a sealed pipe to ensure airtightness). The refrigeration circulation duct is connected to the evaporator 45 in the refrigerator's refrigeration system 4. A damper 47 is located on the refrigeration circulation duct 46 near the vacuum preservation chamber. Opening the damper 47 allows the refrigeration circulation duct to supply cooling to the vacuum preservation chamber. The vacuum pump 31 is installed on the preservation circulation duct to evacuate the vacuum preservation chamber and remove air. The exhaust port of the vacuum pump 31 is closed and it operates at a low speed. The system promotes air circulation between the fresh-keeping circulating air duct and the vacuum fresh-keeping chamber 2, continuously vacuuming the air to purify it. The first control valve 37 is located near the outlet end of the fresh-keeping circulating air duct (both the inlet and outlet ends are connected to the fresh-keeping circulating air duct for air circulation). It is used to open and close the fresh-keeping circulating air duct and also has an interface connecting to the outside. When the system is reversed, the interface connecting to the outside is open, and fresh air from the outside enters the fresh-keeping circulating air duct through this interface and then enters the vacuum fresh-keeping chamber 2. The control system 1 connects to various sensors, the first control valve 37, and the vacuum pump 31. It can control the operating status of the refrigeration system corresponding to the cold circulation air duct, the operating status of the vacuum pump, and the opening and closing status of the first control valve according to the type of food.

[0051] In a specific embodiment, the vacuum preservation device further includes a humidifier 35 and an air purifier 33. The preservation circulation duct is sequentially equipped with a vacuum pump 31, an air purifier 33, and a humidifier 35 from the inlet to the outlet. When the vacuum pump 31 drives the air circulation duct and the vacuum preservation chamber 2, the air is purified by the air purifier 33 and then humidified by the humidifier 35, thereby improving the preservation effect of the vacuum preservation chamber.

[0052] The fresh-keeping circulating air duct is also connected to a pipe in parallel with the atomizing humidifier 35. A fourth control valve 36 is installed on the pipe. When the atomizing humidifier 35 is not needed, the atomizing humidifier 35 is turned off, and the fourth control valve 36 is opened so that the air in the fresh-keeping circulating air duct bypasses the atomizing humidifier and passes directly through the pipe.

[0053] The vacuum pump 31 has two exhaust ports (one for circulation and one for vacuuming) that connect to the outside world. A second control valve 32 is provided on the exhaust port (one for circulation and one for vacuuming). The second control valve 32 is used to open and close the interface between the vacuum pump and the outside world. When the second control valve 32 is open, the vacuum pump is in the vacuuming state. When the second control valve 32 is closed, the vacuum pump 31 is in the state of pushing the air circulation duct.

[0054] By setting the humidifier to 35°C, the cooling speed of the food can be accelerated, allowing it to cool down quickly. An air purifier purifies the circulating air, improving the air quality in the vacuum preservation chamber. The air purifier also has an exhaust duct with a third control valve to expel polluted gases.

[0055] Specifically, the vacuum preservation chamber 2 also includes: a pressure sensor 11 for detecting the pressure of the vacuum preservation chamber, a temperature sensor 12 for detecting the temperature T of the vacuum preservation chamber, a humidity sensor 13 for detecting the humidity S, and an infrared thermometer 14 for detecting the internal temperature Ts of the food. Each sensor is directly connected to the control system, transmitting the detected signals to the control system. The control system stores the vacuum level, temperature, and humidity requirements for vacuum preservation of commonly used food items such as leafy vegetables, root vegetables, fruits and vegetables, grains, fresh produce, and cooked food.

[0056] In a specific embodiment, the vacuum pump is a brushless DC vacuum pump, and the speed can be changed according to the vacuum requirement. The entire system operates continuously without interruption, that is, the same amount of air is continuously pumped out and input, maintaining a constant pressure.

[0057] The present invention also proposes a refrigerator, including the above-mentioned vacuum preservation device.

[0058] In a specific embodiment, the vacuum preservation compartment 2 is a five-sided sealed container with an opening at the front for storing and retrieving food. A door or a front-mounted drawer can be installed at the front opening to seal it. This vacuum preservation compartment is installed in one of the refrigerator's compartments, which can be the refrigerator compartment or the ice-temperature compartment. The sealed container of the vacuum preservation compartment has an inner shell and an outer shell, with an air duct between them. The air duct has an inlet and an outlet. After the inner shell, outer shell, and air duct are assembled, they are foamed into a single unit. The refrigeration circulation duct is the refrigerator's refrigeration circulation duct, connected to the inlet and outlet of the air duct of the vacuum preservation compartment, and can be a refrigeration circulation system specifically designed for the vacuum preservation device in the refrigerator.

[0059] The control system can be the refrigerator's control system or a control system specifically for vacuum preservation devices.

[0060] Vacuum preservation devices can be specifically divided into vacuum purification systems, which include: vacuum pumps, air purifiers, and atomizing humidifiers, i.e., components installed on the vacuum preservation air ducts.

[0061] The vacuum purification system of the vacuum preservation device has three working modes:

[0062] Vacuum purification system working mode M1 (vacuum degree decrease stage): The vacuum pump draws out the gas in the vacuum preservation chamber and discharges it. The air purifier and atomizing humidifier do not work. The second control valve opens and the first control valve closes to disconnect the preservation circulation air duct.

[0063] Vacuum purification system operating mode M2 ​​(vacuum maintenance stage): The vacuum pump draws gas from the vacuum preservation chamber, purifies it through the air purifier, and humidifies it through the atomizing humidifier before returning it to the vacuum preservation chamber. During the vacuum maintenance stage, the vacuum purification system is a closed loop system; the second control valve is closed, and the first control valve is open. The third control valve is connected to the air purifier, allowing the discharge of polluted gas. After maintaining operating mode M2 ​​for a period of time, the third control valve is opened for a short period to increase the vacuum level until operating mode M1 is entered. The fourth control valve is connected in parallel with the atomizing humidifier. When the atomizing humidifier is working, the fourth control valve is closed; when the atomizing humidifier is not working, the fourth control valve is open.

[0064] Vacuum purification system working mode M3 (vacuum degree rising stage): When the temperature and vacuum degree of the vacuum preservation chamber and the internal temperature of the food to be preserved all reach the set parameters, the vacuum pump, air purifier and atomizing humidifier do not work, the first control valve opens in reverse, and fresh air enters the vacuum preservation chamber.

[0065] When vacuum preservation is not required, all control valves are closed, and the vacuum purification system stops working. The temperature of the vacuum preservation chamber is adjusted according to the needs of food preservation, serving as a refrigerator, freezer, or ice-temperature chamber.

[0066] The refrigeration system of a refrigerator specifically includes: a compressor 41, a condenser 42, a dryer filter 43, a capillary tube 44, and an evaporator 45 that are connected in a circulating manner. This refrigeration system is a common component of a refrigerator and will not be described in detail.

[0067] This invention also proposes a vacuum preservation control method, using the aforementioned vacuum preservation device or the aforementioned refrigerator, specifically including the following steps:

[0068] The user selects to activate the vacuum preservation function on the refrigerator;

[0069] Obtain the information on the type of food selected by the user, and determine the set temperature Tm, the first vacuum degree Pm1, and the maintenance vacuum degree Pm2 of the vacuum preservation chamber based on the information on the type of food.

[0070] Each sensor detects the internal temperature Ts of the food, the temperature T of the vacuum preservation chamber, and the vacuum degree P (pressure) of the vacuum preservation chamber;

[0071] The operating status of the refrigeration system corresponding to the refrigeration circulation duct is controlled according to the detected temperature, and the operating status of the vacuum pump and the opening and closing status of the first control valve are controlled according to the detected temperature and the detected vacuum degree.

[0072] Specifically, controlling the operation of the vacuum pump and the opening / closing state of the first control valve based on the detected temperature and vacuum level includes the following steps:

[0073] When operating in mode M1, the vacuum pump operates at its rated speed to draw a vacuum and expel air.

[0074] Determine whether the following conditions hold true: P≤Pm1, T≤Tm, and Ts=T;

[0075] If so, run working mode M3, which controls the vacuum pump to stop running and opens the interface of the first control valve to connect to the outside; until the vacuum degree of the vacuum preservation chamber P = Pm2, run working mode M2, close the interface of the first control valve to connect to the outside, and control the vacuum pump to run at a preset low speed to drive the air circulation of the preservation circulation duct and the air circulation of the vacuum preservation chamber.

[0076] If not, return to the step of determining whether P≤Pm1, T≤Tm, and Ts=T are true.

[0077] Furthermore, after controlling the vacuum pump to operate at a preset low speed, the following steps are also included:

[0078] The humidity S of the vacuum preservation chamber is detected;

[0079] Determine if the humidity S in the vacuum preservation chamber is less than the preset humidity Sm. If yes, turn off the atomizing humidifier; otherwise, turn on the atomizing humidifier.

[0080] The specific steps for controlling the operation of the refrigeration system corresponding to the refrigeration circulation duct based on the detected temperature include:

[0081] Turn on the vacuum preservation function, the refrigeration system will start, and open the damper on the refrigeration circulation duct.

[0082] Detect the temperature T of the vacuum preservation chamber and the internal temperature Ts of the food;

[0083] Determine whether T≤Tm and Ts=T are true; if yes, close the damper; if no, return to the steps of detecting the temperature T of the vacuum preservation chamber and the internal temperature Ts of the food.

[0084] Specifically, when the user selects to exit the vacuum preservation function, the operating mode M3 is activated, which controls the vacuum pump to stop working, opens the first control valve to open the interface connecting to the outside world in the reverse direction, until the vacuum degree P of the vacuum preservation chamber is equal to atmospheric pressure, and stops the control of the vacuum preservation system, that is, shuts down the vacuum preservation system.

[0085] like Figure 2 As shown, the specific control method for selecting the vacuum preservation function is as follows:

[0086] Select the vacuum preservation function, select the type of food to be preserved, and determine the required temperature Tm, humidity Sm, first vacuum degree Pm1 (at 600Pa), and maintain vacuum degree Pm2 for the vacuum preservation chamber.

[0087] The vacuum purification system operates in the working mode M1, the vacuum pump works at the rated rotation speed, and the vacuum degree P in the vacuum fresh-keeping chamber decreases rapidly; the air door of the refrigeration system is opened, and the temperature T of the vacuum fresh-keeping chamber decreases; the infrared thermometer detects the internal temperature Ts of the food material;

[0088] When the temperature T of the vacuum fresh-keeping chamber is ≤ Tm and the internal temperature Ts of the food material is equal to T, the air door is closed;

[0089] When the vacuum degree P of the vacuum fresh-keeping chamber is ≤ Pm1, the temperature T is ≤ Tm, and the internal temperature Ts of the food material is equal to T, the vacuum purification system operates in the working mode M3, the vacuum pump stops working, the first control valve opens in the reverse direction, and fresh air enters the vacuum fresh-keeping chamber until the vacuum degree P of the vacuum fresh-keeping chamber reaches Pm2;

[0090] When the vacuum degree P of the vacuum fresh-keeping chamber reaches Pm2, the vacuum purification system operates in the working mode M2. The vacuum purification system is a closed loop system, the vacuum pump operates at a low rotation speed to maintain the vacuum degree of the vacuum fresh-keeping chamber, and the extracted air is purified by the air purifier and then returns to the vacuum fresh-keeping chamber;

[0091] When the vacuum purification system operates in the working mode M2, the humidity S of the vacuum fresh-keeping chamber is detected. When S < Sm, the atomizing humidifier is turned on, the purified air is humidified and then returns to the vacuum fresh-keeping chamber, and when S reaches Sm, the atomizing humidifier stops;

[0092] As Figure 3 shown, the specific control method for exiting the vacuum fresh-keeping function is specifically as follows:

[0093] Select to exit the vacuum fresh-keeping function;

[0094] The vacuum purification system operates in the working mode M3, the first control valve opens in the reverse direction, and fresh air enters the vacuum fresh-keeping chamber until the vacuum degree P of the vacuum fresh-keeping chamber reaches atmospheric pressure;

[0095] Shut down the vacuum fresh-keeping system.

[0096] In a specific embodiment, the parameters required for vacuum fresh-keeping of common food materials are:

[0097]

[0098]

[0099] The present invention also provides a computer-readable storage medium for storing a computer program, and the computer program executes the above vacuum fresh-keeping control method when running.

[0100] In one or more exemplary embodiments, the described functionality may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software as a computer program product, the functionality may be stored or transmitted as one or more instructions or code on or through a computer-readable medium. A computer-readable medium includes both computer storage media and communication media, encompassing any medium that facilitates the transfer of a computer program from one location to another. A storage medium may be any available medium accessible to a computer. By way of example and not limitation, such a computer-readable medium may include RAM, ROM, EEPROM, CD-ROM or other optical disc storage, disk storage or other magnetic storage devices, or any other medium that can be used to carry or store desired program code in the form of instructions or data structures and is accessible to a computer. Any connection is also legitimately referred to as a computer-readable medium. For example, if the software is transmitted from a website, server, or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio, and microwave, then the coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio, and microwave are included in the definition of a medium. As used in this article, disk and disc include compact discs (CDs), laser discs, optical discs, digital multi-purpose discs (DVDs), floppy disks, and Blu-ray discs. Disks typically reproduce data magnetically, while discs reproduce data optically using lasers. Combinations of these should also be included within the scope of computer-readable media.

[0101] It should be noted that the terminology used above is for describing particular embodiments only and is not intended to limit the exemplary embodiments of the present invention. As used herein, unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0102] Unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the invention. It should also be understood that, for ease of description, the dimensions of the various parts shown in the drawings are not drawn to actual scale. Techniques, methods, and devices known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and devices should be considered part of the specification. In all examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numerals and letters in the following figures denote similar items; therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0103] In the description of this invention, it should be understood that the orientation or positional relationship indicated by directional terms such as "front, back, up, down, left, right", "horizontal, vertical, horizontal" and "top, bottom" is generally based on the orientation or positional relationship shown in the accompanying drawings, and is only for the convenience of describing this invention and simplifying the description. Unless otherwise stated, these directional terms do not indicate or imply that the device or element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation on the scope of protection of this invention; the directional terms "inner" and "outer" refer to the inner and outer contours relative to the outline of each component itself.

[0104] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0105] Furthermore, it should be noted that the use of terms such as "first" and "second" to define components is merely for the purpose of distinguishing the corresponding components. Unless otherwise stated, the above terms have no special meaning and therefore should not be construed as limiting the scope of protection of this invention.

[0106] The above description is merely a preferred embodiment of the present invention and is not intended to limit the invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A vacuum preservation control method, using a vacuum preservation device, the vacuum preservation device comprising: The vacuum preservation chamber is used to place food and is connected to the refrigeration circulation duct and the preservation circulation duct. A vacuum pump is installed on the fresh-keeping circulation duct to create a vacuum and exhaust air to the outside, or to drive the fresh-keeping circulation duct to circulate air with the vacuum fresh-keeping chamber. The first control valve is located at the outlet end of the fresh-keeping circulating air duct and has an interface for connecting to the outside world. It can open and close the fresh-keeping circulating air duct and the interface for connecting to the outside world. The control system controls the operating status of the refrigeration system corresponding to the cold circulation duct, the operating status of the vacuum pump, and controls the opening and closing of the first control valve of the preservation circulation duct or the opening and closing of the interface connecting to the outside world, based on the type of food information. The vacuum preservation control method includes the following steps: Select to enable the vacuum preservation function; Obtain the information on the type of food selected by the user, and determine the set temperature Tm, the first vacuum degree Pm1, and the maintenance vacuum degree Pm2 of the vacuum preservation chamber based on the information on the type of food. The internal temperature Ts of the food, the temperature T of the vacuum preservation chamber, and the vacuum degree P of the vacuum preservation chamber were measured. The operating status of the refrigeration system corresponding to the refrigeration circulation duct is controlled according to the detected temperature, and the vacuum pump operates at the rated speed to draw a vacuum and discharge air. Determine whether the following conditions hold true: P≤Pm1, T≤Tm, and Ts=T. If so, control the vacuum pump to stop running, open the interface of the first control valve to connect to the outside until the vacuum degree of the vacuum preservation chamber is P=Pm2, close the interface of the first control valve to connect to the outside, and control the vacuum pump to run at a preset low speed to drive the air circulation of the preservation circulation duct and the vacuum preservation chamber. If not, return to the step of determining whether P≤Pm1, T≤Tm, and Ts=T are true.

2. The vacuum preservation control method as described in claim 1, characterized in that, The fresh-keeping circulating air duct is equipped with an atomizing humidifier and an air purifier controlled by the control system.

3. The vacuum preservation control method as described in claim 1, characterized in that, The vacuum preservation device also includes: a pressure sensor for detecting the pressure of the vacuum preservation chamber, a temperature sensor for detecting the temperature of the vacuum preservation chamber, a humidity sensor for detecting humidity, and an infrared thermometer for detecting the internal temperature of the food.

4. The vacuum preservation control method as described in claim 2, characterized in that, After controlling the vacuum pump to operate at a preset low speed, the method further includes the following steps: The humidity S of the vacuum preservation chamber is detected; Determine if the humidity S in the vacuum preservation chamber is less than the preset humidity Sm corresponding to the type of food selected by the user. If yes, turn off the atomizing humidifier; otherwise, turn on the atomizing humidifier.

5. The vacuum preservation control method as described in claim 1, characterized in that, The refrigeration circulation duct is equipped with a damper. Opening the damper can connect the refrigeration circulation duct to supply cooling to the vacuum preservation chamber. The specific steps for controlling the operating status of the refrigeration system corresponding to the refrigeration circulation duct based on the detected temperature include: Turn on the vacuum preservation function, the refrigeration system will start, and open the air damper; Detect the temperature T of the vacuum preservation chamber and the internal temperature Ts of the food; Determine whether T≤Tm and Ts=T are true; if yes, close the damper; if no, return to the steps of detecting the temperature T of the vacuum preservation chamber and the internal temperature Ts of the food.

6. The vacuum preservation control method as described in claim 1, characterized in that, When the vacuum preservation function is selected to be deactivated, the vacuum pump is stopped, the interface connecting the first control valve to the outside is opened, until the vacuum degree P of the vacuum preservation chamber is equal to atmospheric pressure.

7. A refrigerator, characterized in that, This includes the vacuum preservation control method described in any one of claims 1 to 6.

8. The refrigerator as described in claim 7, characterized in that, The vacuum preservation device is installed in the compartment of the refrigerator, and the refrigeration circulation duct is the refrigeration circulation duct of the refrigerator.

9. A computer-readable storage medium for storing a computer program, characterized in that, When the computer program is executed, it performs the vacuum preservation control method according to any one of claims 1 to 6.

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