Refrigerator and refrigeration drawer control method thereof

Abstract

The invention discloses a refrigerator and a refrigeration drawer control method thereof, which are characterized in that a photocatalytic circulation oxygen reduction module is additionally arranged on the basis of vacuumizing of a refrigeration drawer, and oxygen in the refrigeration drawer is converted into water through oxygen reduction reaction by the photocatalytic circulation oxygen reduction module; therefore, the oxygen content in the drawer is further reduced on the basis of not changing the existing vacuum structure, and the food fresh-keeping effect is improved. In addition, the humidity in the refrigeration drawer is controlled, moisture in an internal gas path is condensed and liquefied through the temperature difference between a heating wire and low-temperature reaction liquid in the photocatalytic circulation oxygen reduction module, and then effective drying of the refrigeration drawer is achieved. In addition, on the aspect of the oxygen reduction function, the photocatalytic circulation oxygen reduction module can achieve different degrees of oxygen concentration regulation and control effects through different control logics, and therefore different use requirements of users are met.

Description

Technical Field

[0001] The invention relates to the field of refrigerators, and in particular to a refrigerator and a control method for a refrigeration drawer thereof. Background Art

[0002] As the living standards of residents improve, people's daily eating patterns are becoming more and more diverse. A refrigerator is a refrigeration device that maintains a constant low temperature and can store food. A refrigerator generally has a freezer and a refrigerator, both of which are equipped with drawers to store food. Among them, the preservation function in the refrigerator has received more and more attention. During the storage process, food will gradually age and rot due to respiration and evaporation. Oxygen is one of the main factors affecting the respiration and evaporation of food. For different foods, the optimal storage environment requires different oxygen concentrations, and excessive humidity will also accelerate the corruption of food. However, the oxygen concentration and vacuum degree of the vacuum drawers currently installed in the industry are relatively fixed, and the humidity is not regulated, which makes it difficult to meet the different usage scenarios of users. Summary of the invention

[0003] The purpose of the embodiment of the present invention is to provide a refrigerator and a refrigerated drawer control method thereof, which realizes graded regulation of oxygen concentration and vacuum degree through different control logics, and has dehumidification and drying functions, thereby meeting various usage scenarios of users.

[0004] To achieve the above object, an embodiment of the present invention provides a refrigerator, comprising:

[0005] a box body, in which at least one storage chamber is formed, and the storage chamber at least includes a refrigerating chamber, a freezing chamber and a refrigerating drawer;

[0006] A refrigeration system, used to provide coldness for the refrigerator, the refrigeration system comprising a compressor, a condenser and an evaporator connected in sequence through pipelines;

[0007] A vacuum oxygen reduction device is arranged in the box, comprising a vacuum pump, a diverter box and an oxygen reduction module connected in sequence, wherein the vacuum pump is used to evacuate the refrigerated drawer, the diverter box is used to collect the gas extracted by the vacuum pump into the oxygen reduction module or to collect it outside the refrigerated drawer, and the oxygen reduction module is used to perform a photocatalytic oxygen reduction reaction on the gas collected by the diverter box and then input it into the refrigerated drawer;

[0008] A heating wire is provided in the gas outlet communicating between the diverter box and the oxygen reduction module, and is used to heat the gas flowing into the oxygen reduction module so that the heated gas reacts with the liquid in the oxygen reduction module to liquefy;

[0009] A controller, the controller being configured to:

[0010] When an operation instruction of the refrigerated drawer is detected, the vacuum pump is controlled to start;

[0011] When the refrigerated drawer enters the dehumidification mode, the heating wire is started, and the diverter box is controlled to operate in the first conduction mode;

[0012] When the refrigerated drawer exits the dehumidification mode or does not need to enter the dehumidification mode, the working modes of the vacuum pump and the oxygen reduction module are controlled according to the oxygen content requirement of the refrigerated drawer, and the shunt box is controlled to operate in the first conduction mode or the second conduction mode;

[0013] The first conduction mode refers to the gas pumped out by the vacuum pump being introduced into the oxygen reduction module, and the second conduction mode refers to the gas pumped out by the vacuum pump being introduced out of the refrigerated drawer.

[0014] The above technical solution has the following advantages or beneficial effects: by installing a photochemical cycle oxygen reduction module in the refrigerator refrigeration drawer, through a series of program controls, combined with the vacuum pump's vacuuming effect, the oxygen content inside the refrigeration drawer is further reduced, and due to the oxygen reduction effect of the oxygen reduction module, the vacuum pump does not need to operate at high power, which solves the problem of increased noise caused by the increase in vacuum pump power, and meets the user's personalized use needs while improving the food preservation effect. In addition, a heating wire is provided in the air outlet connected to the diverter box and the oxygen reduction module, and the moisture in the internal air path is condensed and liquefied through the temperature difference between the heating wire and the low-temperature reaction liquid inside the oxygen reduction module, thereby achieving effective drying of the refrigeration drawer.

[0015] In some embodiments of the present application, the diverter box is provided with an air inlet, a first air outlet, and a second air outlet; wherein,

[0016] The first air outlet of the diverter box is connected to the air inlet of the oxygen reduction module, the air outlet of the oxygen reduction module is connected to the air inlet of the refrigerated drawer, and the heating wire is arranged at the first air outlet;

[0017] The second air outlet of the diverter box is connected to the box body;

[0018] The air inlet of the diverter box is connected to the air outlet of the vacuum pump, and the air inlet of the vacuum pump is connected to the air outlet of the refrigerated drawer.

[0019] The above technical solution has the following advantages or beneficial effects: by arranging a diverter box between the vacuum pump and the oxygen reduction module, when the refrigerated drawer does not need further oxygen reduction, the gas in the refrigerated drawer can be discharged out of the drawer by connecting the second air outlet and the air inlet of the diverter box. When the refrigerated drawer needs further oxygen reduction, the gas in the refrigerated drawer can be introduced into the oxygen reduction module by connecting the first air outlet and the air inlet of the diverter box. The oxygen reduction function of the oxygen reduction module is used to solve the problem that a large amount of oxygen remains due to the inability to completely evacuate the air using only a vacuum pump, so that the refrigerated drawer can be in a low-oxygen environment.

[0020] In some embodiments of the present application, when the diverter box is in a first conduction mode, the air inlet and the first air outlet are opened, and the second air outlet is closed; when the diverter box is in a second conduction mode, the air inlet and the second air outlet are opened, and the first air outlet is closed.

[0021] The above technical solution has the following advantages or beneficial effects: by arranging a diverter box between the vacuum pump and the oxygen reduction module, when the diverter box is in different conduction modes, it can adapt to different oxygen content requirements of the refrigerated drawer.

[0022] In some embodiments of the present application, the controller is further configured to:

[0023] When the refrigerated drawer exits the dehumidification mode, the heating wire is turned off.

[0024] The above technical solution has the following advantages or beneficial effects: when the humidity in the refrigerated drawer is low, the heating wire is turned off in time to avoid the phenomenon of excessively low humidity.

[0025] In some embodiments of the present application, controlling the working modes of the vacuum pump and the oxygen reduction module according to the oxygen content requirement of the refrigerated drawer, and controlling the shunt box to operate in the first conduction mode or the second conduction mode, includes:

[0026] Control the shunt box to operate in a second conduction mode;

[0027] Obtaining the real-time oxygen concentration of the refrigerated drawer;

[0028] When the real-time oxygen concentration is less than or equal to a preset first concentration threshold, obtaining the oxygen content requirement of the refrigerated drawer;

[0029] When the oxygen content requirement is in high vacuum mode, the diverter box is controlled to operate in a first conduction mode, and the light source in the oxygen reduction module is turned on.

[0030] The above technical solution has the following advantages or beneficial effects: when the refrigerated drawer needs to further reduce oxygen, the gas in the refrigerated drawer can be transported to the oxygen reduction module by connecting the first air outlet and the air inlet of the diversion box using a vacuum pump, and the light source is turned on. The oxygen reduction function of the oxygen reduction module is used to solve the problem that a large amount of oxygen remains due to the inability to completely evacuate the air using only a vacuum pump, so that the refrigerated drawer can be in a low-oxygen environment.

[0031] In some embodiments of the present application, after controlling the shunt box to operate in the first conduction mode, the controller is further configured to:

[0032] When the real-time oxygen concentration is less than or equal to a second concentration threshold corresponding to the high vacuum mode, the vacuum pump and the light source in the oxygen reduction module are turned off, and the air inlet of the diverter box is closed; wherein the second concentration threshold is less than the first concentration threshold.

[0033] The above technical solution has the following advantages or beneficial effects: when the refrigerated drawer is in a high vacuum environment, the requirements of the high vacuum mode are met, and at this time, the vacuum pump and the light source of the oxygen reduction module are turned off to prevent the oxygen content in the refrigerated drawer from being further reduced. In addition, the air inlet of the diverter box is closed here to avoid the problem of reducing the sealing of the refrigerated drawer due to the conduction of the air inlet, thereby destroying the vacuum environment.

[0034] In some embodiments of the present application, after obtaining the real-time oxygen concentration of the refrigerated drawer, the controller is further configured to:

[0035] When the real-time oxygen concentration is less than or equal to the first concentration threshold and the oxygen content requirement is in a normal mode, the vacuum pump is turned off and the air inlet of the diverter box is closed.

[0036] The above technical solution has the following advantages or beneficial effects: when there is no need for a high vacuum environment in the refrigerated drawer, it is sufficient to control the vacuum pump to start. At this time, the air inlet of the shunt box is not connected to the oxygen reduction module, and no further oxygen reduction is required. After vacuuming for a period of time, the shunt box and the vacuum pump can be turned off. In addition, the air inlet of the shunt box is closed here to avoid the problem of reducing the sealing of the refrigerated drawer due to the connection of the air inlet, thereby destroying the vacuum environment.

[0037] In some embodiments of the present application, the oxygen reduction module includes a shell, a light source, a gas-liquid separation tank, a photocatalytic layer, an air outlet and an air inlet. The photocatalytic layer is arranged at the air inlet. When the light source is turned on, it acts on the photocatalytic layer to cause the photocatalytic layer to produce an oxygen reduction reaction and liquefy the oxygen. The gas-liquid separation tank is arranged at the air outlet to separate the liquid in the gas.

[0038] The above technical solution has the following advantages or beneficial effects: when the light source of the oxygen reduction module is turned on, the photocatalytic layer and the gas undergo a photocatalytic oxygen reduction reaction, thereby reducing the oxygen content in the gas.

[0039] In some embodiments of the present application, the height of the air outlet in the oxygen reduction module is higher than the air inlet, and the bottom of the gas-liquid separation tank is provided with a plurality of channels whose cross-sectional areas are smaller than a set threshold.

[0040] The above technical solution has the following advantages or beneficial effects: by setting the height of the oxygen reduction module outlet higher, the gas entering the oxygen reduction module can pass through the photocatalytic layer and the gas-liquid separation tank from bottom to top, fully react with the photocatalytic layer, and fully separate through the gas-liquid separation tank before flowing out from the outlet. In addition, the gas-liquid separation tank is designed as a V-shaped structure, and a channel is designed at the bottom according to the surface tension of the liquid, which allows the gas to pass quickly but the liquid is difficult to pass. This structure separates the catalytic reaction liquid from the module outlet, preventing the liquid from overflowing from the module with the gas during the system gas circulation process.

[0041] To achieve the above-mentioned purpose, an embodiment of the present invention further provides a refrigerator refrigeration drawer control method, the refrigerator comprising a vacuum pump, a diverter box and a deoxygenation module connected in sequence, the vacuum pump is used to evacuate the refrigeration drawer, the diverter box is used to collect the gas extracted by the vacuum pump into the deoxygenation module or to collect it outside the refrigeration drawer, the deoxygenation module is used to perform a photocatalytic deoxygenation reaction on the gas collected by the diverter box and then input it into the refrigeration drawer; a heating wire is provided in the gas outlet connected to the diverter box and the deoxygenation module, the heating wire is used to heat the gas collected by the deoxygenation module so that the heated gas reacts with the liquid in the deoxygenation module to liquefy; the method comprises:

[0042] When an operation instruction of the refrigerated drawer is detected, the vacuum pump is controlled to start;

[0043] When the refrigerated drawer enters the dehumidification mode, the heating wire is started, and the diverter box is controlled to operate in the first conduction mode;

[0044] When the refrigerated drawer exits the dehumidification mode or does not need to enter the dehumidification mode, the working modes of the vacuum pump and the oxygen reduction module are controlled according to the oxygen content requirement of the refrigerated drawer, and the shunt box is controlled to operate in the first conduction mode or the second conduction mode;

[0045] The first conduction mode refers to the gas pumped out by the vacuum pump being introduced into the oxygen reduction module, and the second conduction mode refers to the gas pumped out by the vacuum pump being introduced out of the refrigerated drawer.

[0046] The above technical solution has the following advantages or beneficial effects: by installing a photochemical cycle oxygen reduction module in the refrigerator refrigeration drawer, through a series of program controls, combined with the vacuum pump's vacuuming effect, the oxygen content inside the refrigeration drawer is further reduced, and due to the oxygen reduction effect of the oxygen reduction module, the vacuum pump does not need to operate at high power, which solves the problem of increased noise caused by the increase in vacuum pump power, and meets the user's personalized use needs while improving the food preservation effect. In addition, a heating wire is provided in the air outlet connected to the diverter box and the oxygen reduction module, and the moisture in the internal air path is condensed and liquefied through the temperature difference between the heating wire and the low-temperature reaction liquid inside the oxygen reduction module, thereby achieving effective drying of the refrigeration drawer. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] Figure 1 is a schematic diagram of the external structure of a refrigerator provided by an embodiment of the present invention;

[0048] Figure 2 is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention;

[0049] Figure 3 is a schematic structural diagram of a refrigeration system in a refrigerator provided by an embodiment of the present invention;

[0050] Figure 4 is a schematic structural diagram of a refrigerated drawer provided in an embodiment of the present invention;

[0051] Figure 5 It is a schematic diagram of the connection relationship of various components in the vacuum deoxygenation device provided in an embodiment of the present invention;

[0052] Figure 6 is a schematic structural diagram of an oxygen reduction module provided in an embodiment of the present invention;

[0053] Figure 7 is a schematic diagram of the structure of a shunt box provided in an embodiment of the present invention;

[0054] Figure 8 is a first working flow diagram of a controller in a refrigerator provided by an embodiment of the present invention;

[0055] Fig. 9 is a second working flow chart of the controller in the refrigerator provided by an embodiment of the present invention;

[0056] Fig.10 The present invention is a flowchart of a refrigerator refrigeration drawer control method provided by an embodiment of the present invention.

[0057] Among them, 100, refrigerator; 111, cold storage room; 112, freezer; 101, compressor; 102, evaporator; 103, capillary; 104, condenser; 11, refrigerated drawer; 12, sealing strip; 13, air inlet of refrigerated drawer; 14, air outlet of refrigerated drawer; 15, drawer chamber; 21, shell; 22, air outlet of deoxygenation module; 23, light source; 24, gas-liquid separation tank; 25, photocatalytic layer; 26, air inlet of deoxygenation module; 31, vacuum pump; 32. Deoxygenation module; 33, diverter box; 331, air inlet of diverter box; 332, second air outlet; 333, first air outlet; 334, heating wire; 335, diverter box chamber. DETAILED DESCRIPTION

[0058] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0059] In the description of the present application, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0060] The terms "first", "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of this application, unless otherwise specified, "plurality" means two or more.

[0061] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0062] See also Figure 1 , Figure 1It is a schematic diagram of the external structure of a refrigerator 100 provided by an embodiment of the present invention. The refrigerator 100 of this embodiment is approximately rectangular in shape. The refrigerator includes a box body that defines a storage space and one or more door bodies arranged at the opening of the box body, wherein the door body includes a door body shell located outside the box body, a door body liner located inside the box body, an upper end cover, a lower end cover, and an insulation layer located between the door body shell, the door body liner, the upper end cover, and the lower end cover; usually, the insulation layer is filled with foam. The box body is provided with a chamber, wherein the chamber includes a component storage chamber for placing components in the refrigerator, such as a press cabin, etc., and also includes a storage space for storing food, etc.

[0063] See also Figure 2 , Figure 2 1 is a schematic diagram of the internal structure of a refrigerator provided by an embodiment of the present invention. The storage space can be divided into multiple storage rooms. The storage rooms can be configured as a refrigerating room 111, a freezing room 112 and a refrigerating drawer 11 according to different uses. They can also include a temperature-changing room, a moisturizing drawer, etc. Each storage room corresponds to one or more door bodies, for example, Figure 2 The storage room at the upper part is provided with a double-opening door body. The door body can be pivotally arranged at the opening of the box body, and can also be opened in a drawer-like manner to realize drawer-like storage.

[0064] See also Figure 3 , Figure 3The schematic diagram of the structure of the refrigeration system in the refrigerator 100 provided in the embodiment of the present invention, the refrigeration system includes a compressor 101, an evaporator 102, a drying filter (not shown in the figure), a capillary tube 103, a condenser 104 and a gas-liquid separator (not shown in the figure). The working process of the refrigeration system includes a compression process, a condensation process, a throttling process and an evaporation process. Among them, the compression process is: plug in the power cord of the refrigerator, when the contacts of the thermostat are connected, the compressor 101 starts to work, and the low-temperature and low-pressure refrigerant is sucked into the compressor 101, and is compressed into a high-temperature and high-pressure superheated gas in the cylinder of the compressor 101 and then discharged into the condenser 104; the condensation process is: the high-temperature and high-pressure refrigerant gas dissipates heat through the condenser 104, the temperature continues to drop, and is gradually cooled to a saturated vapor of normal temperature and high pressure, and is further cooled to a saturated liquid, and the temperature no longer drops. The temperature at this time is called the condensation temperature, and the pressure of the refrigerant remains almost unchanged during the entire condensation process; the throttling process is as follows ... The process is as follows: the condensed refrigerant saturated liquid is filtered through a drying filter to remove moisture and impurities and then flows into the capillary 103, through which it is throttled and depressurized, and the refrigerant becomes wet steam at room temperature and low pressure; the evaporation process is as follows: the wet steam at room temperature and low pressure begins to absorb heat and vaporize in the evaporator 102, which not only reduces the temperature of the evaporator 102 and its surroundings, but also turns the refrigerant into a low-temperature, low-pressure gas. The refrigerant coming out of the evaporator 102 passes through the gas-liquid separator and returns to the compressor 101 again, and the above process is repeated to transfer the heat in the refrigerator to the air outside the box, thereby achieving the purpose of refrigeration.

[0065] See also Figure 4 , Figure 4 It is a structural schematic diagram of a refrigerated drawer provided in an embodiment of the present invention. The refrigerated drawer 11 described in the embodiment of the present invention includes a sealing strip 12, an air inlet 13 of the refrigerated drawer, an air outlet 14 of the refrigerated drawer, and a drawer chamber 15. The refrigerated drawer 11 is equipped with an oxygen concentration sensor and a humidity sensor. The oxygen concentration sensor is used to detect the real-time oxygen concentration of the drawer chamber 15, and the humidity sensor is used to detect the real-time humidity in the drawer chamber 15. A touch screen may be provided at the drawer door of the refrigerated drawer 11. The user can manually operate the touch screen to set the oxygen concentration and humidity, and then the subsequent controller adjusts the working mode of the vacuum pump, the shunt box and the oxygen reduction module according to the set oxygen concentration and humidity. Of course, the controller can also obtain the oxygen concentration and humidity suitable for the current storage environment of the refrigerated drawer 11 according to the set mode, and then the subsequent controller adjusts the working mode of the vacuum pump, the shunt box and the oxygen reduction module according to the obtained oxygen concentration and humidity.

[0066] See also Figure 5 , Figure 5Schematic diagram of the connection relationship of various components in the vacuum oxygen reduction device provided in an embodiment of the present invention. The vacuum oxygen reduction device is arranged in the box, and includes a vacuum pump 31, a diverter box 33 and an oxygen reduction module 32 connected in sequence. The vacuum pump 31 is used to evacuate the refrigerated drawer 11. The diverter box 33 is used to collect the gas extracted by the vacuum pump 31 into the oxygen reduction module 32 or to collect it outside the refrigerated drawer 11. The oxygen reduction module 32 is used to perform a photocatalytic oxygen reduction reaction on the gas collected by the diverter box 33 and then input it into the refrigerated drawer 11. The heating wire is arranged in the gas outlet connected to the diverter box 33 and the oxygen reduction module 32, and is used to heat the gas collected in the oxygen reduction module 32 so that the heated gas reacts with the liquid in the oxygen reduction module 32 to liquefy.

[0067] See also Figure 6 , Figure 6 It is a structural schematic diagram of the oxygen reduction module 32 provided in an embodiment of the present invention, wherein the oxygen reduction module 32 includes a housing 21, a light source 23, a gas-liquid separation tank 24, a photocatalytic layer 25, an air outlet 22, and an air inlet 26. The photocatalytic layer 25 is disposed at the air inlet 26. When the light source 23 is turned on, it acts on the photocatalytic layer 25 so that the photocatalytic layer 25 produces an oxygen reduction reaction and liquefies the oxygen. The gas-liquid separation tank 24 is disposed at the air outlet 22 to separate the liquid in the gas. The height of the air outlet 22 in the oxygen reduction module 32 is higher than the air inlet 26. The bottom of the gas-liquid separation tank 24 is provided with a plurality of channels with a cross-sectional area less than a set threshold. If the channel is a circular channel, the area threshold is set according to an empirical value, which can effectively prevent liquid molecules from passing through, but gas molecules can pass through.

[0068] Exemplarily, the deoxygenation module 32 is filled with catalytic reaction liquid, the light source 23 is an ultraviolet LED light source, the gas-liquid separation tank 24 is designed as a "v"-shaped structure, and a channel is designed at the bottom according to the surface tension of the liquid to allow gas to pass quickly but liquid is difficult to pass through. This structure separates the catalytic reaction liquid from the module outlet to prevent the liquid from overflowing from the module with the gas during the system gas circulation process. The photocatalytic layer 25 includes two parts: catalyst material and growth substrate. The growth substrate is a metal mesh or glass fiber mesh, etc., which is not limited by the present invention. Depending on the nature of the substrate, a catalyst cone array can be grown in situ on the surface of the substrate. The array can reflect and absorb the light emitted by the ultraviolet LED light source above multiple times inside the array, thereby converting light energy into chemical energy to the greatest extent, thereby driving the photocatalytic oxygen reduction reaction. The deoxygenation principle of the deoxygenation module 32 is: the oxygen dissolved in the solution captures the photogenerated electrons generated by the catalyst and combines with the protons in the solution to undergo an oxygen reduction reaction, reducing the oxygen to water. The reaction equation is O2+4H + +4e -→2H2O. The specific process is as follows: the light source 23 is turned on, and the ultraviolet light irradiates the catalyst in the photocatalytic layer 25 to generate high-energy electrons. The oxygen dissolved in the catalytic reaction liquid combines with the protons and high-energy electrons to generate a four-electron oxygen reduction reaction, reducing the oxygen to water. After passing through the gas-liquid separation tank 24, the low-oxygen gas after gas-liquid separation is discharged through the gas outlet 22, thereby reducing the oxygen content inside the system.

[0069] In the embodiment of the present invention, when the light source 23 of the oxygen reduction module 32 is turned on, the photocatalytic layer 25 reacts with the gas to generate a photocatalytic oxygen reduction reaction, thereby reducing the oxygen content in the gas. The height of the gas outlet 22 of the oxygen reduction module 32 is set relatively high so that the gas flowing into the oxygen reduction module 32 can pass through the photocatalytic layer 25 and the gas-liquid separation tank 24 from bottom to top, fully react with the photocatalytic layer 25, and fully separate through the gas-liquid separation tank 24 before flowing out from the gas outlet 22. In addition, the gas-liquid separation tank 24 is designed as a "v"-shaped structure, and a channel is designed at the bottom that allows gas to pass quickly but liquid to pass through with difficulty. This structure separates the catalytic reaction liquid from the module gas outlet to prevent liquid from overflowing from the module with gas during the system gas circulation process.

[0070] Furthermore, in order to further reduce the oxygen content inside the refrigerated drawer 11 by using the oxygen reduction module 32, it is necessary to realize gas circulation between the refrigerated drawer 11 and the oxygen reduction module 32. In addition, the introduction of the new module should not interfere with the original function of the refrigerated drawer 11. To this end, the present invention adds a shunt box 33 between the original refrigerated drawer 11 and the oxygen reduction module 32.

[0071] See also Figure 7 , Figure 7 It is a structural schematic diagram of a diverter box 33 provided in an embodiment of the present invention, wherein the diverter box 33 is provided with an air inlet 331, a first air outlet 333, a second air outlet 332, a heating wire 334 and a diverter box chamber 335; wherein, the first air outlet 333 of the diverter box 33 is connected to the air inlet 26 of the deoxygenation module 32, the air outlet 22 of the deoxygenation module 32 is connected to the air inlet 13 of the refrigerated drawer 11, and the heating wire 334 is arranged at the first air outlet 333; the second air outlet 332 of the diverter box 33 is connected to the box body; the air inlet 331 of the diverter box 33 is connected to the air outlet of the vacuum pump 31, and the air inlet of the vacuum pump 31 is connected to the air outlet 14 of the refrigerated drawer 11.

[0072] Exemplarily, the diverter box 33 has two functions: one is to change the two-to-two connections between different interfaces through the solenoid valve, thereby controlling the flow direction of the system gas path; the other is to quickly heat the gas flowing through the interface through the heating wire 334 in the first air outlet 333. The first conduction mode refers to the gas extracted by the vacuum pump 31 being merged into the oxygen reduction module 32, and the second conduction mode refers to the gas extracted by the vacuum pump 31 being merged outside the refrigerated drawer 11. When the diverter box 33 is in the first conduction mode, the air inlet 331 and the first air outlet 333 are opened, and the second air outlet 332 is closed, at which time the vacuum pump 31 and the oxygen reduction module 32 are connected; when the diverter box 33 is in the second conduction mode, the air inlet 331 and the second air outlet 332 are opened, and the first air outlet 333 is closed, at which time the vacuum pump 31 and the oxygen reduction module 32 are not connected.

[0073] In an embodiment of the present invention, a diverter box 33 is provided between the vacuum pump 31 and the oxygen reduction module 32. When the refrigerated drawer 11 does not need further oxygen reduction, the gas in the refrigerated drawer 11 can be discharged out of the drawer by connecting the second air outlet 332 and the air inlet 331 of the diverter box 33. When the refrigerated drawer 11 needs further oxygen reduction, the gas in the refrigerated drawer 11 can be introduced into the oxygen reduction module 32 by connecting the first air outlet 333 and the air inlet 331 of the diverter box 33. The oxygen reduction function of the oxygen reduction module 32 is used to solve the problem that only the vacuum pump 31 cannot completely evacuate the air and a large amount of oxygen remains, so that the refrigerated drawer 11 can be in a low oxygen environment.

[0074] Specifically, the controller in the refrigerator is configured to: when an operating instruction of the refrigerated drawer is detected, control the vacuum pump to start; when the refrigerated drawer enters the dehumidification mode, start the heating wire, and control the diverter box to operate in the first conduction mode; when the refrigerated drawer exits the dehumidification mode or does not need to enter the dehumidification mode, control the working mode of the vacuum pump and the oxygen reduction module according to the oxygen content requirement of the refrigerated drawer, and control the diverter box to operate in the first conduction mode or the second conduction mode.

[0075] For example, see Figure 8 , Figure 8It is the first working flow chart of the controller in the refrigerator provided by the embodiment of the present invention, and the operation instruction may be a manual vacuuming instruction received from the user, a vacuuming instruction generated when the door of the refrigerated drawer 11 is closed, or a vacuuming instruction issued by the controller itself. According to the different use requirements of the user, the refrigerator is equipped with a dehumidification function in addition to the two working modes of the normal mode and the high vacuum mode. After the heating wire 334 is turned on, the humidity inside the refrigerated drawer 11 can be reduced. After the vacuum pump 31 is running, the gas content in the refrigerated drawer 11 gradually decreases. At this time, the system will give priority to determining whether to enable the dehumidification function. If the real-time humidity in the refrigerated drawer 11 detected at this time is greater than the preset high humidity threshold, the dehumidification function is enabled; or the user can also manually start the dehumidification function. When the dehumidification function is enabled, the diverter box 33 will give priority to connecting its air inlet 331 and the first air outlet 333, and turn on the heating wire 334 located in the first air outlet 333. At this time, the gas in the system forms an internal cycle and circulates repeatedly between the refrigerated drawer 11, the vacuum pump 31, the diverter box 33 and the oxygen reduction module 32. When the gas passes through the first gas outlet 333 of the diverter box 33, the gas is quickly heated by the heating wire 334. At this time, the temperature of the water vapor in the air rises, and then the high-temperature water vapor quickly enters the deoxygenation module 32 driven by the vacuum pump 31, and liquefies after encountering the low-temperature reaction liquid inside the deoxygenation module 32, thereby achieving dehumidification and drying of the gas in the system. It should be noted that the light source 23 of the deoxygenation module 32 is not turned on at this time, and there is no need to perform a photocatalytic oxygen reduction reaction. When the refrigerated drawer 11 exits the dehumidification mode, the heating wire 334 is turned off. For example, when the real-time humidity of the refrigerated drawer 11 is less than the preset low humidity threshold, the dehumidification mode is exited, and the heating wire 334 stops working. When the humidity of the refrigerated drawer 11 is low, the heating wire 334 is turned off in time to avoid the phenomenon of too low humidity. It should be noted that the high humidity threshold and the low humidity threshold can be set according to the optimal storage humidity required for the actual stored food, or the user can manually configure it.

[0076] In the embodiment of the present invention, by installing a photochemical cycle oxygen reduction module 32 in the refrigerator refrigeration drawer 11, through a series of program control, combined with the vacuum pump 31, the oxygen content inside the refrigeration drawer 11 is further reduced, and due to the oxygen reduction effect of the oxygen reduction module 32, the vacuum pump 31 does not need to operate at high power, which solves the problem of increased noise caused by the power increase of the vacuum pump 31, and meets the personalized use needs of users while improving the food preservation effect. In addition, by arranging a diverter box 33 between the vacuum pump 31 and the oxygen reduction module 32, when the diverter box 33 is in different conduction modes, it can adapt to the different oxygen content requirements of the refrigeration drawer 11. A heating wire 334 is provided in the air outlet connected to the diverter box 33 and the oxygen reduction module 32, and the moisture in the internal gas path is condensed and liquefied through the temperature difference between the heating wire 334 and the low-temperature reaction liquid inside the oxygen reduction module 32, thereby achieving effective drying of the refrigeration drawer 11.

[0077] Specifically, the control of the working mode of the vacuum pump and the oxygen reduction module according to the oxygen content demand of the refrigerated drawer, and the control of the diverter box to operate in the first conduction mode or the second conduction mode, includes: controlling the diverter box to operate in the second conduction mode; obtaining the real-time oxygen concentration of the refrigerated drawer; when the real-time oxygen concentration is less than or equal to the preset first concentration threshold, obtaining the oxygen content demand of the refrigerated drawer; when the oxygen content demand is a high vacuum mode, controlling the diverter box to operate in the first conduction mode, and turning on the light source in the oxygen reduction module; after controlling the diverter box to operate in the first conduction mode, when the real-time oxygen concentration is less than or equal to the second concentration threshold corresponding to the high vacuum mode, turning off the vacuum pump and the light source in the oxygen reduction module, and closing the air inlet of the diverter box. Wherein, the second concentration threshold is less than the first concentration threshold.

[0078] For example, see Fig. 9 , Fig. 9This is the second working flow chart of the controller in the refrigerator provided by the embodiment of the present invention. When the refrigerated drawer 11 exits the dehumidification mode or does not enter the dehumidification mode at the beginning, the shunt box 33 first conducts the air inlet 331 and the second air outlet 332. At this time, the vacuum pump 31 will extract the gas inside the refrigerated drawer 11, and obtain the real-time oxygen concentration detected by the oxygen concentration sensor in the refrigerated drawer 11. When the controller detects that the real-time oxygen concentration is less than or equal to the preset first concentration threshold, it means that the gas content in the refrigerated drawer 11 is already very low at this time. However, since the vacuum pump 31 cannot achieve 100% vacuuming, the oxygen content of the residual gas in the refrigerated drawer 11 is still relatively high. At this time, the controller determines whether to select the high vacuum mode (the controller determines it by itself or the user actively selects it). If the high vacuum mode is selected, it is necessary to enable the oxygen reduction module 32 to further reduce the oxygen in the refrigerated drawer 11. The shunt box 33 switches the channel, connects the air inlet 331 and the first air outlet 333, and starts the light source 23 of the oxygen reduction module 32 to perform a photocatalytic oxygen reduction reaction. During this process, the gas in the system circulates continuously between the refrigerated drawer 11, the vacuum pump 31, the diverter box 33 and the oxygen reduction module 32, and the oxygen dissolves in the reaction liquid of the oxygen reduction module 32, and is reduced to water through a photocatalytic reaction, thereby further reducing the oxygen content. During this process, the oxygen concentration sensor continuously detects the real-time oxygen concentration. When the real-time oxygen concentration in the circulation system is less than or equal to the second concentration threshold, it means that the oxygen concentration is already very low at this time, which meets the high vacuum requirements of the refrigerated drawer 11. The system is completed, the vacuum pump 31, the diverter box 33 and the light source 23 of the oxygen reduction module 32 are turned off, and the refrigerated drawer 11 enters the high vacuum mode. It should be noted that the first concentration threshold and the second concentration threshold can be set according to actual usage conditions, such as the first concentration threshold is the oxygen concentration value of the gas remaining in the refrigerated drawer 11 after the vacuum pump 31 is evacuated at its maximum capacity.

[0079] In an embodiment of the present invention, when the refrigerated drawer 11 needs to further reduce oxygen, the first air outlet 333 and the air inlet 331 of the diverter box 33 can be connected to the vacuum pump 31 to merge the gas in the refrigerated drawer 11 into the oxygen reduction module 32, turn on the light source 23, and use the oxygen reduction function of the oxygen reduction module 32 to solve the problem that only the vacuum pump 31 cannot completely evacuate and a lot of oxygen remains, so that the refrigerated drawer 11 can be in a low oxygen environment. When the refrigerated drawer 11 is in a high vacuum environment, the requirements of the high vacuum mode have been met. At this time, the vacuum pump 31 and the light source 23 of the oxygen reduction module 32 are turned off to avoid further reduction of the oxygen content in the refrigerated drawer 11. In addition, the air inlet 331 of the diverter box 33 is closed here to avoid the problem of reducing the sealing of the refrigerated drawer 11 due to the conduction of the air inlet 331, thereby destroying the vacuum environment.

[0080] Specifically, after obtaining the real-time oxygen concentration of the refrigerated drawer, the controller is further configured to: when the real-time oxygen concentration is less than or equal to the first concentration threshold and the oxygen content requirement is in normal mode, turn off the vacuum pump and close the air inlet of the diverter box.

[0081] For example, see Fig. 9 When the refrigerated drawer 11 exits the dehumidification mode or does not enter the dehumidification mode at the beginning, the diverter box 33 first connects the air inlet 331 and the second air outlet 332. At this time, the vacuum pump 31 extracts the gas inside the refrigerated drawer 11 and obtains the real-time oxygen concentration detected by the oxygen concentration sensor in the refrigerated drawer 11. When the controller detects that the real-time oxygen concentration is less than or equal to the first concentration threshold, the controller determines whether to select the high vacuum mode. If the high vacuum mode is not selected, the normal mode is entered, that is, there is no need to activate the oxygen reduction module 3. 2, the light source 23 of the oxygen reduction module 32 remains turned off. Since the diverter box 33 is in the second conduction mode at this time, the vacuum pump 31 and the oxygen reduction module 32 are not conducting, that is, the gas extracted by the vacuum pump 31 will be directly discharged to the outside of the drawer through the second air outlet 332 of the diverter box 33, and will not flow through the oxygen reduction module 32 and then return to the refrigerated drawer 11. Since the oxygen content in the refrigerated drawer 11 is already relatively low at this time, the vacuum extraction can be stopped. At this time, the vacuum pump 31 and the diverter box 33 are turned off, and the system stops working.

[0082] In the embodiment of the present invention, when the refrigerated drawer 11 does not need a high vacuum environment, it is sufficient to control the vacuum pump 31 to start. At this time, the air inlet 331 of the diverter box 33 is not connected to the oxygen reduction module 32, and no further oxygen reduction is required. After vacuuming for a period of time, the diverter box 33 and the vacuum pump 31 can be turned off. In addition, the air inlet 331 of the diverter box 33 is turned off here to avoid the problem of reducing the sealing of the refrigerated drawer 11 due to the conduction of the air inlet 331, thereby destroying the vacuum environment.

[0083] See also Fig.10 , Fig.10 The present invention is a flowchart of a refrigerator refrigeration drawer control method provided by an embodiment of the present invention, wherein the refrigerator refrigeration drawer control method is implemented by a controller in the refrigerator, and the refrigerator comprises a vacuum pump, a shunt box and a deoxygenation module connected in sequence, wherein the vacuum pump is used to evacuate the refrigeration drawer, the shunt box is used to collect the gas extracted by the vacuum pump into the deoxygenation module or to collect it outside the refrigeration drawer, and the deoxygenation module is used to perform a photocatalytic deoxygenation reaction on the gas collected by the shunt box and then input it into the refrigeration drawer; a heating wire is provided in an outlet connected to the shunt box and the deoxygenation module, and the heating wire is used to heat the gas collected by the deoxygenation module so that the heated gas reacts with the liquid in the deoxygenation module to liquefy; the method comprises:

[0084] S1. When an operation instruction of a refrigerated drawer is detected, the vacuum pump is controlled to start;

[0085] S2, when the refrigerated drawer enters the dehumidification mode, starting the heating wire and controlling the diverter box to operate in the first conduction mode;

[0086] S3, when the refrigerated drawer exits the dehumidification mode or does not need to enter the dehumidification mode, controlling the working modes of the vacuum pump and the oxygen reduction module according to the oxygen content requirement of the refrigerated drawer, and controlling the shunt box to operate in the first conduction mode or the second conduction mode;

[0087] The first conduction mode refers to the gas pumped out by the vacuum pump being introduced into the oxygen reduction module, and the second conduction mode refers to the gas pumped out by the vacuum pump being introduced out of the refrigerated drawer.

[0088] Specifically, the diverter box is provided with an air inlet, a first air outlet and a second air outlet; wherein,

[0089] The first air outlet of the diverter box is connected to the air inlet of the oxygen reduction module, the air outlet of the oxygen reduction module is connected to the air inlet of the refrigerated drawer, and the heating wire is arranged at the first air outlet;

[0090] The second air outlet of the diverter box is connected to the box body;

[0091] The air inlet of the diverter box is connected to the air outlet of the vacuum pump, and the air inlet of the vacuum pump is connected to the air outlet of the refrigerated drawer.

[0092] Specifically, when the diverter box is in a first conduction mode, the air inlet and the first air outlet are opened, and the second air outlet is closed; when the diverter box is in a second conduction mode, the air inlet and the second air outlet are opened, and the first air outlet is closed.

[0093] Specifically, the method further includes: when the refrigerated drawer exits the dehumidification mode, turning off the heating wire.

[0094] Specifically, controlling the working modes of the vacuum pump and the oxygen reduction module according to the oxygen content requirement of the refrigerated drawer, and controlling the shunt box to operate in the first conduction mode or the second conduction mode, includes:

[0095] Control the shunt box to operate in a second conduction mode;

[0096] Obtaining the real-time oxygen concentration of the refrigerated drawer;

[0097] When the real-time oxygen concentration is less than or equal to a preset first concentration threshold, obtaining the oxygen content requirement of the refrigerated drawer;

[0098] When the oxygen content requirement is in high vacuum mode, the diverter box is controlled to operate in a first conduction mode, and the light source in the oxygen reduction module is turned on.

[0099] Specifically, after controlling the shunt box to operate in the first conduction mode, the method further includes:

[0100] When the real-time oxygen concentration is less than or equal to a second concentration threshold corresponding to the high vacuum mode, the vacuum pump and the light source in the oxygen reduction module are turned off, and the air inlet of the diverter box is closed; wherein the second concentration threshold is less than the first concentration threshold.

[0101] Specifically, after obtaining the real-time oxygen concentration of the refrigerated drawer, the method further includes:

[0102] When the real-time oxygen concentration is less than or equal to the first concentration threshold and the oxygen content requirement is in a normal mode, the vacuum pump is turned off and the air inlet of the diverter box is closed.

[0103] Specifically, the oxygen reduction module includes a shell, a light source, a gas-liquid separation tank, a photocatalytic layer, an air outlet and an air inlet. The photocatalytic layer is arranged at the air inlet. When the light source is turned on, it acts on the photocatalytic layer to cause the photocatalytic layer to produce an oxygen reduction reaction and liquefy the oxygen. The gas-liquid separation tank is arranged at the air outlet to separate the liquid in the gas.

[0104] Specifically, the height of the air outlet in the oxygen reduction module is higher than the air inlet, and the bottom of the gas-liquid separation tank is provided with a plurality of channels whose cross-sectional areas are smaller than a set threshold.

[0105] It is worth noting that the working process of each module in the refrigerator refrigeration drawer control method described in the embodiment of the present invention can refer to the working process of the controller in the refrigerator described in the above embodiment, and will not be repeated here.

[0106] The above is a preferred embodiment of the present invention. It should be pointed out that a person skilled in the art can make several improvements and modifications without departing from the principle of the present invention. These improvements and modifications are also considered to be within the scope of protection of the present invention.

Claims

1. A refrigerator, characterized in that: include: a box body, in which at least one storage chamber is formed, and the storage chamber at least includes a refrigerating chamber, a freezing chamber and a refrigerating drawer; A refrigeration system, used to provide coldness for the refrigerator, the refrigeration system comprising a compressor, a condenser and an evaporator connected in sequence through pipelines; A vacuum oxygen reduction device is arranged in the box, comprising a vacuum pump, a diverter box and an oxygen reduction module connected in sequence, wherein the vacuum pump is used to evacuate the refrigerated drawer, the diverter box is used to collect the gas extracted by the vacuum pump into the oxygen reduction module or to collect it outside the refrigerated drawer, and the oxygen reduction module is used to perform a photocatalytic oxygen reduction reaction on the gas collected by the diverter box and then input it into the refrigerated drawer; A heating wire is provided in the gas outlet communicating between the diverter box and the oxygen reduction module, and is used to heat the gas flowing into the oxygen reduction module so that the heated gas reacts with the liquid in the oxygen reduction module to liquefy; A controller, the controller being configured to: When an operation instruction of the refrigerated drawer is detected, the vacuum pump is controlled to start; When the refrigerated drawer enters the dehumidification mode, the heating wire is started, and the diverter box is controlled to operate in the first conduction mode; When the refrigerated drawer exits the dehumidification mode or does not need to enter the dehumidification mode, the working modes of the vacuum pump and the oxygen reduction module are controlled according to the oxygen content requirement of the refrigerated drawer, and the shunt box is controlled to operate in the first conduction mode or the second conduction mode; The first conduction mode refers to the gas pumped out by the vacuum pump being introduced into the oxygen reduction module, and the second conduction mode refers to the gas pumped out by the vacuum pump being introduced out of the refrigerated drawer.

2. The refrigerator according to claim 1, characterized in that: The diverter box is provided with an air inlet, a first air outlet and a second air outlet; wherein, The first air outlet of the diverter box is connected to the air inlet of the oxygen reduction module, the air outlet of the oxygen reduction module is connected to the air inlet of the refrigerated drawer, and the heating wire is arranged at the first air outlet; The second air outlet of the diverter box is connected to the box body; The air inlet of the diverter box is connected to the air outlet of the vacuum pump, and the air inlet of the vacuum pump is connected to the air outlet of the refrigerated drawer.

3. The refrigerator according to claim 2, characterized in that: When the diverter box is in a first conduction mode, the air inlet and the first air outlet are opened, and the second air outlet is closed; when the diverter box is in a second conduction mode, the air inlet and the second air outlet are opened, and the first air outlet is closed.

4. The refrigerator according to claim 1, characterized in that: The controller is also configured to: When the refrigerated drawer exits the dehumidification mode, the heating wire is turned off.

5. The refrigerator according to claim 1, characterized in that: The step of controlling the working modes of the vacuum pump and the oxygen reduction module according to the oxygen content requirement of the refrigerated drawer, and controlling the diverter box to operate in the first conduction mode or the second conduction mode, comprises: Control the shunt box to operate in a second conduction mode; Obtaining the real-time oxygen concentration of the refrigerated drawer; When the real-time oxygen concentration is less than or equal to a preset first concentration threshold, obtaining the oxygen content requirement of the refrigerated drawer; When the oxygen content requirement is in high vacuum mode, the diverter box is controlled to operate in a first conduction mode, and the light source in the oxygen reduction module is turned on.

6. The refrigerator according to claim 5, characterized in that: After controlling the shunt box to operate in the first conduction mode, the controller is further configured to: When the real-time oxygen concentration is less than or equal to a second concentration threshold corresponding to the high vacuum mode, the vacuum pump and the light source in the oxygen reduction module are turned off, and the air inlet of the diverter box is closed; wherein the second concentration threshold is less than the first concentration threshold.

7. The refrigerator according to claim 5, characterized in that: After obtaining the real-time oxygen concentration of the refrigerated drawer, the controller is further configured to: When the real-time oxygen concentration is less than or equal to the first concentration threshold and the oxygen content requirement is in a normal mode, the vacuum pump is turned off and the air inlet of the diverter box is closed.

8. The refrigerator according to claim 1, characterized in that The oxygen reduction module includes a shell, a light source, a gas-liquid separation tank, a photocatalytic layer, an air outlet and an air inlet. The photocatalytic layer is arranged at the air inlet. When the light source is turned on, it acts on the photocatalytic layer to cause the photocatalytic layer to produce an oxygen reduction reaction and liquefy the oxygen. The gas-liquid separation tank is arranged at the air outlet to separate the liquid in the gas.

9. The refrigerator according to claim 8, characterized in that The height of the air outlet in the oxygen reduction module is higher than the air inlet, and the bottom of the gas-liquid separation tank is provided with a plurality of channels whose cross-sectional areas are smaller than a set threshold.

10. A refrigerator refrigeration drawer control method, characterized in that: The refrigerator comprises a vacuum pump, a diverter box and a deoxygenation module which are connected in sequence, wherein the vacuum pump is used to evacuate a refrigerated drawer, the diverter box is used to collect the gas extracted by the vacuum pump into the deoxygenation module or to collect it outside the refrigerated drawer, and the deoxygenation module is used to perform a photocatalytic deoxygenation reaction on the gas collected by the diverter box and then input it into the refrigerated drawer; a heating wire is provided in the gas outlet connected to the diverter box and the deoxygenation module, and the heating wire is used to heat the gas collected by the deoxygenation module so that the heated gas reacts with the liquid in the deoxygenation module to liquefy; the method comprises: When an operation instruction of the refrigerated drawer is detected, the vacuum pump is controlled to start; When the refrigerated drawer enters the dehumidification mode, the heating wire is started, and the diverter box is controlled to operate in the first conduction mode; When the refrigerated drawer exits the dehumidification mode or does not need to enter the dehumidification mode, the working modes of the vacuum pump and the oxygen reduction module are controlled according to the oxygen content requirement of the refrigerated drawer, and the shunt box is controlled to operate in the first conduction mode or the second conduction mode; The first conduction mode refers to the gas pumped out by the vacuum pump being introduced into the oxygen reduction module, and the second conduction mode refers to the gas pumped out by the vacuum pump being introduced out of the refrigerated drawer.

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