Dual-system refrigerator pressure maintaining and energy saving control method and device and storage medium

Abstract

The invention relates to a dual-system refrigerator pressure maintaining and energy saving control method and device and a storage medium, and the dual-system refrigerator pressure maintaining and energy saving control method comprises the steps that a refrigerator refrigeration request is obtained; a valve body of the electric valve is switched to the refrigeration side corresponding to the refrigeration request, so that a condensation pipe of the refrigerator is subjected to pressure relief within the preset first duration; then, a compressor is controlled to operate, and refrigeration is conducted on the refrigeration side; after refrigeration is finished, the compressor is controlled to stop running, and a valve body of the electric valve is switched to a fully-closed position so that pressure maintaining can be conducted on the condensation pipe; a valve body of the electric valve can be switched to one side of the refrigerating chamber, one side of the freezing chamber and a fully-closed position, and the pressure maintaining and energy saving effects of the refrigerating system of the dual-system refrigerator are achieved.

Description

Technical Field

[0001] The present application relates to the field of refrigerators, and in particular to a pressure-maintaining and energy-saving control method, device and storage medium for a dual-system refrigerator. Background Art

[0002] When the refrigerator is operating normally, the condenser side is high pressure and the evaporator side is low pressure. There is a large pressure difference between the two sides. The refrigerant absorbs or releases heat through phase change at different pressures to cool or heat. When the refrigerator compressor stops, the refrigerant on the high-pressure side of the condenser flows into the low-pressure side of the evaporator through the throttling device, and the pressure difference on both sides will gradually decrease until it reaches balance. However, when the compressor is started again, the compressor needs to establish the pressure difference on both sides again, resulting in energy waste.

[0003] At present, most dual-system refrigerators do not have the system pressure maintenance function, and single-system refrigerators use two main ways to maintain pressure. The first option is to directly control the opening and closing of the valve connected between the condenser and the evaporator. When the compressor is turned on, the valve is opened for refrigeration, and when the compressor is stopped, the valve is closed for pressure maintenance; the second option is to connect a pressure relief capillary branch between the compressor exhaust port and the low-pressure side of the evaporator, and at the same time connect a one-way valve in series between the compressor and the condenser to prevent the backflow of high-pressure refrigerant in the condenser. The purpose of both methods is to maintain the high pressure on the condenser side when the compressor is stopped, and reduce the time required to reach equilibrium at the next refrigeration start.

[0004] However, the above solutions are mostly used for single-system refrigerators. The structure of single-system refrigerators is relatively simple and can achieve pressure-maintaining and energy-saving effects, but the methods cannot be simply applied to dual-system refrigerators. In addition, the addition of valves and capillary branches in Solution 2 will affect the comprehensive performance indicators of the refrigerator. If Solution 2 is used for dual-system refrigerators, the system pipelines will become more complicated, and the reliability of the system and the performance of the refrigerator will be reduced.

[0005] With regard to the problem in the related art that the dual-system refrigerator refrigeration system cannot maintain pressure and save energy, no effective solution has been proposed yet. Summary of the invention

[0006] In this embodiment, a dual-system refrigerator pressure-maintaining and energy-saving control method, device and storage medium are provided to solve the problem that the dual-system refrigerator refrigeration system cannot maintain pressure and save energy in the related art.

[0007] In a first aspect, a dual-system refrigerator pressure-maintaining and energy-saving control method is provided in this embodiment, comprising:

[0008] Get refrigerator cooling request;

[0009] Switching the valve of the electric valve to the refrigeration side corresponding to the refrigeration request so that the condenser pipe of the refrigerator is depressurized within a preset first time period; then, controlling the compressor to operate to refrigerate the refrigeration side;

[0010] After the refrigeration is finished, the compressor is controlled to stop running, and the valve of the electric valve is switched to the fully closed position to maintain the pressure of the condenser tube; wherein, the valve of the electric valve can be switched to the refrigerator side, the freezer side and the fully closed position.

[0011] In some embodiments, if the refrigeration request includes both a refrigeration request and a freezing request, the valve of the electric valve is first switched to the side of the refrigerating chamber, so that the condenser tube is depressurized for a preset first time, and the compressor is controlled to operate to refrigerate the refrigerating chamber;

[0012] When the refrigeration of the refrigerator compartment is finished, switch the valve of the electric valve to the freezer compartment side to cool the freezer compartment;

[0013] When the refrigeration of the freezer compartment is finished, switch the valve of the electric valve to the fully closed position to maintain the pressure of the condenser pipe.

[0014] In some of the embodiments, after refrigeration is completed, controlling the compressor to stop running includes:

[0015] Determine whether the refrigeration evaporator has reached the defrosting condition;

[0016] If so, determining whether the speed of the compressor is lower than a preset speed value;

[0017] If so, the valve of the electric valve is controlled to switch to the fully closed position, the compressor is controlled to run for a preset second time period, the compressor is controlled to stop running, and the defrost heating wire is turned on for defrosting.

[0018] In some of the embodiments, if the refrigeration evaporator does not meet the defrosting condition, the compressor is controlled to stop running, the valve of the electric valve is switched to the fully closed position, and the pressure of the condenser is maintained.

[0019] In some of the embodiments, if the speed of the compressor is higher than a preset speed value, the speed of the compressor is controlled to drop below the preset speed value, the valve of the electric valve is controlled to switch to a fully closed position, and after the compressor is controlled to run for a preset second time period, the compressor is controlled to stop running, and the defrost heating wire is turned on for defrosting.

[0020] In a second aspect, a dual-system refrigerator pressure-maintaining and energy-saving control system is provided in this embodiment, and the dual-system refrigerator pressure-maintaining and energy-saving control method described in the first aspect is applied. The dual-system refrigerator pressure-maintaining and energy-saving control system includes:

[0021] A compressor, a condenser, an anti-dew pipe, a drying filter, an electric valve, a refrigeration evaporator and a freezing evaporator; the output end of the compressor is connected to the condenser, the anti-dew pipe, the drying filter, the electric valve, the refrigeration evaporator and the input end of the compressor in sequence;

[0022] The electric valve is also connected to the input end of the refrigeration evaporator, and the output end of the refrigeration evaporator is connected to the input end of the compressor.

[0023] In a third aspect, a dual-system refrigerator pressure-maintaining and energy-saving control device is provided in this embodiment, including: an acquisition module, a first control module and a second control module, wherein:

[0024] An acquisition module, used to acquire a refrigerator refrigeration request;

[0025] The first control module is used to switch the valve of the electric valve to the refrigeration side corresponding to the refrigeration request so that the condenser pipe of the refrigerator is depressurized within a preset first time period; thereafter, the compressor is controlled to operate to refrigerate the refrigeration side;

[0026] The second control module is used to control the compressor to stop running after the refrigeration is completed, and switch the valve of the electric valve to the fully closed position to maintain the pressure of the condenser tube; wherein the valve of the electric valve can be switched to the refrigerator side, the freezer side and the fully closed position.

[0027] In a fourth aspect, an electronic device is provided in this embodiment, including a memory, a processor, and a computer program stored in the memory and executable on the processor, and when the processor executes the computer program, the dual-system refrigerator pressure maintaining and energy-saving control method described in the first aspect above is implemented.

[0028] In a fifth aspect, a computer device is provided in this embodiment, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the steps of the dual-system refrigerator pressure maintaining and energy-saving control method described in the first aspect are implemented.

[0029] In a sixth aspect, in this embodiment, a storage medium is provided, on which a computer program is stored, and when the program is executed by a processor, the dual-system refrigerator pressure maintaining and energy-saving control method described in the first aspect above is implemented.

[0030] Compared with the related art, the dual-system refrigerator pressure-maintaining and energy-saving control method provided in the present embodiment obtains the refrigerator refrigeration request; switches the valve of the electric valve to the refrigeration side corresponding to the refrigeration request, so that the condenser of the refrigerator is depressurized within a preset first time period; then, controls the operation of the compressor to cool the refrigeration side; after the refrigeration is completed, controls the compressor to stop running, and switches the valve of the electric valve to the fully closed position to maintain the pressure of the condenser; wherein the valve of the electric valve can be switched to the refrigerator compartment side, the freezer compartment side and the fully closed position, thereby achieving the effect of pressure-maintaining and energy-saving of the dual-system refrigerator refrigeration system.

[0031] Details of one or more embodiments of the present application are set forth in the following drawings and description to make other features, objects, and advantages of the present application more readily apparent. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0033] Figure 1 This is a hardware structure block diagram of a terminal of the dual-system refrigerator pressure-maintaining and energy-saving control method of this embodiment.

[0034] Figure 2 4 is a flow chart of the dual-system refrigerator pressure-maintaining and energy-saving control method of this embodiment.

[0035] Figure 3 This is a flow chart of another dual-system refrigerator pressure-maintaining and energy-saving control method of this embodiment.

[0036] Figure 4 Schematic diagram of the structure of the dual-system refrigerator pressure-maintaining and energy-saving control system of this embodiment.

[0037] Figure 5 It is a structural block diagram of the dual-system refrigerator pressure-maintaining and energy-saving control device of this embodiment. DETAILED DESCRIPTION

[0038] In order to more clearly understand the purpose, technical solutions and advantages of the present application, the present application is described and illustrated below in conjunction with the accompanying drawings and embodiments.

[0039] Unless otherwise defined, the technical terms or scientific terms involved in this application shall have the general meaning understood by people with ordinary skills in the technical field to which this application belongs. The words "one", "a", "a", "the", "these" and the like in this application do not represent quantitative restrictions, and they can be singular or plural. The terms "include", "comprise", "have" and any variants thereof involved in this application are intended to cover non-exclusive inclusions; for example, a process, method and system, product or device comprising a series of steps or modules (units) is not limited to the listed steps or modules (units), but may include unlisted steps or modules (units), or may include other steps or modules (units) inherent to these processes, methods, products or devices. The words "connect", "connected", "coupled" and the like involved in this application are not limited to physical or mechanical connections, but may include electrical connections, whether directly or indirectly. The "multiple" involved in this application refers to two or more. "And / or" describes the association relationship of associated objects, indicating that there can be three relationships. For example, "A and / or B" can mean: A exists alone, A and B exist at the same time, and B exists alone. Usually, the character " / " indicates that the objects associated with each other are in an "or" relationship. The terms "first", "second", "third", etc. involved in this application are only used to distinguish similar objects and do not represent a specific ordering of the objects.

[0040] The method embodiment provided in this embodiment can be executed in a terminal, a computer or a similar computing device. For example, running on a terminal, Figure 1 : is a hardware structure block diagram of the terminal of the dual-system refrigerator pressure-maintaining and energy-saving control method of this embodiment. Figure 1 As shown, the terminal may include one or more ( Figure 1 Only one is shown in the figure) processor 102 and memory 104 for storing data, wherein processor 102 may include but is not limited to a processing device such as a microprocessor MCU or a programmable logic device FPGA. The above terminal may also include a transmission device 106 and an input and output device 108 for communication functions. It can be understood by those skilled in the art that Figure 1 The structure shown is only for illustration and does not limit the structure of the above terminal. Figure 1 More or fewer components as shown, or with Figure 1 Different configurations shown.

[0041] The memory 104 can be used to store computer programs, for example, software programs and modules of application software, such as the computer program corresponding to the dual-system refrigerator pressure-maintaining and energy-saving control method in this embodiment. The processor 102 executes various functional applications and data processing by running the computer program stored in the memory 104, that is, to implement the above method. The memory 104 may include a high-speed random access memory, and may also include a non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, the memory 104 may further include a memory remotely arranged relative to the processor 102, and these remote memories may be connected to the terminal via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0042] The transmission device 106 is used to receive or send data via a network. The above network includes a wireless network provided by the communication provider of the terminal. In one example, the transmission device 106 includes a network adapter (Network Interface Controller, referred to as NIC), which can be connected to other network devices through a base station so as to communicate with the Internet. In one example, the transmission device 106 can be a radio frequency (Radio Frequency, referred to as RF) module, which is used to communicate with the Internet wirelessly.

[0043] In this embodiment, a dual-system refrigerator pressure-maintaining and energy-saving control method is provided. Figure 2 FIG. 1 is a flow chart of the dual-system refrigerator pressure-maintaining and energy-saving control method of this embodiment. Figure 2 As shown, the process includes the following steps:

[0044] Step S201, obtain a refrigerator refrigeration request; switch the valve of the electric valve to the refrigeration side corresponding to the refrigeration request, so that the condenser tube of the refrigerator is depressurized within a preset first time period; then, control the operation of the compressor to cool the refrigeration side.

[0045] Specifically, in the prior art, the electric valve in the refrigeration system control is either on the refrigeration side or on the freezing side. When the compressor stops, the electric valve waits on the freezing side, resulting in the inability to maintain the pressure difference between the condenser and the evaporator after the compressor stops. When the next refrigeration request is received, the compressor needs to be started for a longer time and more energy to make the condenser reach high pressure for refrigeration. To this end, this embodiment improves the electric valve and the control method to achieve the effect of pressure maintenance and energy saving. When it is detected that the refrigerator's refrigeration compartment needs to be refrigerated, the refrigerator's refrigeration compartment side in the control system initiates a refrigeration request. After the electric valve receives the refrigeration request from the refrigeration side, the valve of the electric valve is controlled to switch to the refrigeration side. When it is detected that the refrigerator's freezer compartment needs to be refrigerated, the refrigerator's freezer side in the control system initiates a refrigeration request. After the electric valve receives the refrigeration request from the freezing side, the valve of the electric valve is controlled to switch to the freezing side. When refrigeration is not required, the valve of the electric valve remains in the fully closed position.

[0046] Since the condenser is pressurized by the electric valve before refrigeration, directly starting the compressor will cause the compressor to fail to start due to the high pressure on the condenser side or consume a lot of energy to start. When the refrigerator receives a refrigeration request, it first controls the valve of the electric valve to switch to the refrigeration side corresponding to the refrigeration request, and performs pressure relief for the first preset time. For example, in this embodiment, the pressure relief can be performed for 30 seconds (s). The specific time can be determined according to the actual situation, and this embodiment does not make specific restrictions on this. After the pressure relief is completed, the compressor is controlled to run. On the basis of the original pressure, through the operation of the compressor, the condenser quickly reaches the required high pressure state, and the refrigeration side that needs refrigeration is refrigerated. Among them, the output end of the compressor is connected to the input end of the condenser, and the output end of the condenser is connected to one side of the electric valve. The other side of the electric valve can be connected to the refrigeration side, the freezing side and the fully closed position through the valve.

[0047] Step S202, after the refrigeration is completed, control the compressor to stop running, and switch the valve of the electric valve to the fully closed position to maintain the pressure of the condenser; wherein the valve of the electric valve can be switched to the refrigerator side, the freezer side and the fully closed position.

[0048] Specifically, the valve of the electric valve provided in this embodiment can be switched to the side of the refrigerator compartment, the side of the freezer compartment and the fully closed position, wherein when the valve of the electric valve is switched to the side of the refrigerator compartment, the refrigerator compartment can be refrigerated; when the valve of the electric valve is switched to the side of the freezer compartment, the freezer compartment can be refrigerated; when the valve of the electric valve is switched to the fully closed position, the condenser can be pressurized. When the dual-system refrigerator is finished refrigerating, the compressor is controlled to stop running, and the valve of the electric valve is switched to the fully closed position, so as to realize the pressurization of the condenser, so that when the next refrigeration is started, the pressure in the condenser quickly reaches the required pressure value, thereby reducing the energy consumption of the compressor.

[0049] In the existing related technologies, a pressure relief capillary branch is often connected between the compressor exhaust port and the low-pressure side of the evaporator, and a one-way valve is connected in series between the compressor and the condenser to prevent the high-pressure refrigerant in the condenser from flowing back. As a result, there is a problem that the dual-system refrigerator refrigeration system cannot maintain pressure and save energy.

[0050] This embodiment obtains the refrigerator refrigeration request through the above steps S201 to S202; switches the valve of the electric valve to the refrigeration side corresponding to the refrigeration request, so that the condenser of the refrigerator is depressurized within the preset first time length; then controls the compressor to run and refrigerates the refrigeration side; after the refrigeration is completed, controls the compressor to stop running, and switches the valve of the electric valve to the fully closed position to maintain the pressure of the condenser; wherein the valve of the electric valve can be switched to the side of the refrigerator compartment, the side of the freezer compartment and the fully closed position. Compared with the existing related technologies, after receiving the refrigeration request, this embodiment first controls the valve of the electric valve to switch to the refrigeration side for depressurization for a certain period of time, and then turns on the compressor to refrigerate the refrigeration side, so as to avoid the situation where the compressor cannot be started under high pressure or needs high energy consumption to start; when the refrigeration is completed, controls the compressor to stop running, and switches the electric valve to the fully closed position to maintain the pressure of the condenser, so that when the refrigeration is started next time, the condenser can quickly reach the pressure required for refrigeration, and achieve the effect of pressure maintenance and energy saving of the dual-system refrigerator refrigeration system.

[0051] In some of the embodiments, if the refrigeration request includes both a cold storage refrigeration request and a frozen storage refrigeration request, the valve of the electric valve is first switched to the side of the cold storage room to allow the condenser to release pressure for a preset first period of time, and the compressor is controlled to run and the cold storage room is refrigerated; when the refrigeration of the cold storage room is completed, the valve of the electric valve is switched to the side of the freezer room to refrigerate the freezer room; when the refrigeration of the freezer room is completed, the valve of the electric valve is switched to the fully closed position to maintain the pressure on the condenser.

[0052] Specifically, the temperature of the refrigerator compartment is generally higher than that of the freezer compartment. Food stored in the refrigerator compartment is very sensitive to temperature fluctuations. Temperature instability may lead to rapid bacterial growth, thereby accelerating the spoilage of food. In contrast, the temperature of the freezer compartment is set lower, generally around minus 18 degrees, which is enough to inhibit the growth of most bacteria. Therefore, food in the freezer compartment is relatively less likely to deteriorate. Therefore, in order to ensure the freshness and safety of food, when the refrigerator compartment and the freezer compartment need to be refrigerated at the same time, the refrigerator compartment is refrigerated first. The electric valve is first turned on and the valve of the electric valve is switched to one side of the refrigerator compartment to release the pressure of the condenser for the first preset time of 30 seconds, and then the compressor is turned on to refrigerate the refrigerator compartment. After the refrigeration of the refrigerator compartment is completed, the valve of the electric valve is directly switched to one side of the freezer compartment to refrigerate the freezer compartment. When the freezer compartment is cooled, the compressor is controlled to stop and the electric valve is switched to the fully closed position to maintain the high pressure state in the condenser so that the high pressure balance of the condenser can be quickly established when the next cooling request is received, thereby reducing the energy required by the compressor to establish the pressure balance of the condenser during the next cooling.

[0053] In another embodiment, after refrigeration is completed, controlling the compressor to stop operating includes:

[0054] Determine whether the refrigeration evaporator meets the defrosting conditions; if so, determine whether the speed of the compressor is lower than the preset speed value; if so, control the valve of the electric valve to switch to the fully closed position, control the compressor to run for the preset second time, control the compressor to stop running, and turn on the defrosting heating wire for defrosting. If the refrigeration evaporator does not meet the defrosting conditions, control the compressor to stop running, switch the valve of the electric valve to the fully closed position, and maintain the pressure of the condenser.

[0055] Specifically, after the refrigeration is finished, it is detected whether the refrigeration evaporator needs to be defrosted. If the refrigeration evaporator reaches the defrosting condition and needs to be defrosted, the refrigerant in the refrigeration evaporator is first evacuated by the running compressor to reduce the refrigerant to continue to release the latent heat of vaporization in the refrigeration evaporator, and then the defrosting heating wire is started to defrost, thereby reducing the energy input of the heating wire during defrosting, shortening the defrosting time, and also reducing the temperature rise of the freezing chamber. Since the speed of the compressor is inconsistent under different working conditions, in order to ensure that the compressor can evacuate the refrigerant in the evaporator while the compressor does not idle, which affects the service life of the compressor, before the compressor is used to evacuate the refrigerant in the refrigeration evaporator, it is first detected whether the speed of the compressor is lower than the preset speed value. Generally, the compressor can ensure that the refrigerant in the refrigeration evaporator is evacuated at 2500 revolutions per minute (rpm). Therefore, when it is detected that the speed of the compressor is less than 2500rpm, the valve of the electric valve is switched to the fully closed position to maintain the high pressure state in the condenser tube, so that the pressure balance state can be quickly reached when the refrigeration is started next time, saving energy and achieving rapid refrigeration. At the same time, the compressor is controlled to continue to run for a preset second time period, such as 20 seconds. After the refrigerant in the refrigeration evaporator is evacuated, the compressor is turned off, and the defrosting heating wire is turned on to defrost the refrigeration evaporator until the defrosting exit condition is met and the defrosting is stopped. Thus, the heat input during defrosting is reduced.

[0056] If the refrigeration evaporator does not need to be defrosted, the compressor is directly controlled to stop running, and the valve of the electric valve is switched to the fully closed position to maintain the pressure of the condenser.

[0057] In some of the embodiments, if the speed of the compressor is higher than a preset speed value, the speed of the compressor is controlled to drop below the preset speed value, the valve of the electric valve is controlled to switch to a fully closed position, and after the compressor is controlled to run for a preset second time period, the compressor is controlled to stop running, and the defrost heating wire is turned on for defrosting.

[0058] Specifically, when the refrigeration compressor needs to be defrosted, and the speed of the compressor is detected to be higher than the preset speed value of 2500rpm, in order to prevent the compressor from idling after the refrigerant in the refrigeration evaporator is evacuated, the speed of the compressor is first controlled to drop below 2500rpm, and then the valve of the electric valve is switched to the fully closed position to maintain the pressure of the condenser, and the compressor is controlled to run for a preset second time of 20s to evacuate the refrigerant in the refrigeration evaporator, reduce the refrigerant to continue to release the latent heat of vaporization in the refrigeration evaporator, reduce the energy input of the defrost heating wire, shorten the defrost time, and also reduce the temperature rise of the freezing chamber. After the refrigerant in the refrigeration evaporator is evacuated by the compressor, the operation of the compressor is turned off, and the defrost heating wire is turned on to heat and defrost the refrigeration evaporator.

[0059] This embodiment also provides a dual-system refrigerator pressure-maintaining and energy-saving control method. Figure 3 FIG. 1 is a flow chart of another dual-system refrigerator pressure-maintaining and energy-saving control method of this embodiment. Figure 3 As shown, the process includes the following steps:

[0060] Step S301, obtaining a refrigerator refrigeration request;

[0061] Step S302, determining whether the refrigeration request is a refrigeration request, if so, executing step S303, otherwise, executing step S304;

[0062] Step S303, first switching the valve of the electric valve to the side of the refrigerating chamber, so that the condensing pipe is depressurized for a preset first time, and controlling the compressor to operate to refrigerate the refrigerating chamber until the refrigeration of the refrigerating chamber is completed;

[0063] Step S304, determining whether the freezer compartment needs refrigeration, if so, executing step S305, otherwise, executing step S306;

[0064] Step S305, switching the valve of the electric valve to the freezing chamber side to refrigerate the freezing chamber until the refrigeration of the freezing chamber is completed;

[0065] Step S306, determining whether the refrigeration evaporator meets the defrosting condition, if so, executing step S307, otherwise, executing step S310;

[0066] Step S307, determining whether the speed of the compressor is lower than a preset speed value, if so, executing step S308, otherwise, executing step S309;

[0067] Step S308, control the valve of the electric valve to switch to the fully closed position, control the compressor to run for a preset second time period, control the compressor to stop running, and turn on the defrost heating wire to defrost.

[0068] Step S309, after controlling the speed of the compressor to drop below the preset speed value, control the valve of the electric valve to switch to the fully closed position, control the compressor to run for a preset second time, control the compressor to stop running, and turn on the defrost heating wire for defrosting.

[0069] Step S310, controlling the compressor to stop running, switching the valve of the electric valve to a fully closed position, and maintaining the pressure of the condenser.

[0070] Through the above steps S301 to S310, compared with the prior art in which a pressure relief capillary branch is connected between the compressor exhaust port and the low-pressure side of the evaporator, and a one-way valve is connected in series between the compressor and the condenser to prevent the backflow of high-pressure refrigerant in the condenser, when receiving a refrigeration request, this embodiment controls the valve of the electric valve to switch to the refrigeration side to relieve pressure for a certain period of time, and then starts the compressor to refrigerate the cold storage room. By opening the valve for a certain period of time and then starting the compressor for refrigeration, the problem that the compressor cannot be started under high pressure or requires more energy to start can be avoided; when the refrigeration of the cold storage room is finished, if the freezer needs to be refrigerated, the valve of the electric valve is switched to the freezer side to relieve pressure for a certain period of time, and then the compressor is turned on to refrigerate the freezer. After the refrigeration of the refrigerator and freezer is finished, if the refrigeration evaporator needs to be defrosted, the refrigerant in the refrigeration evaporator is first evacuated by the compressor and then the defrosting heating wire is started to heat and defrost the refrigeration evaporator, which reduces the refrigerant to continue to release the latent heat of vaporization in the evaporator, reduces the energy input of the heating wire during defrosting, shortens the defrosting time, and also reduces the temperature rise of the freezer. Finally, when the refrigerator and freezer do not need to be refrigerated, the valve of the electric valve is switched to the fully closed position to maintain the pressure of the condenser pipe, so that the condenser can quickly establish a high-pressure balance during the next refrigeration, reducing the energy input required by the compressor to establish a high-pressure balance, and achieving the effect of pressure maintenance and energy saving of the dual-system refrigerator refrigeration system.

[0071] In this embodiment, a dual-system refrigerator pressure-maintaining and energy-saving control system is provided, and the dual-system refrigerator pressure-maintaining and energy-saving control method described in any of the above embodiments is applied. Figure 4 : is a schematic diagram of the structure of the dual-system refrigerator pressure-maintaining and energy-saving control system of this embodiment. Figure 4 As shown, the dual-system refrigerator pressure-maintaining and energy-saving control system includes:

[0072] The compressor 41, the condenser 42, the anti-condensation pipe 43, the drying filter 44, the electric valve 45, the refrigeration evaporator 46 and the freezing evaporator 47; the output end 411 of the compressor 41 is connected in sequence with the condenser 42, the anti-condensation pipe 43, the drying filter 44, the electric valve 45, the refrigeration evaporator 46, the freezing evaporator 47 and the input end 412 of the compressor 41; the electric valve 45 is also connected to the input end 471 of the freezing evaporator 47, and the output end 472 of the freezing evaporator 47 is connected to the input end 412 of the compressor 41. The electric valve 45 includes three valves, which can be connected to the refrigeration evaporator 46, the freezing evaporator 47 and the fully closed position respectively.

[0073] In this embodiment, a dual-system refrigerator pressure-maintaining and energy-saving control device is also provided, which is used to implement the above-mentioned embodiments and preferred implementation modes, and will not be repeated hereafter. The terms "module", "unit", "subunit", etc. used below may be a combination of software and / or hardware that implements a predetermined function. Although the devices described in the following embodiments are preferably implemented in software, the implementation of hardware, or a combination of software and hardware, is also possible and conceivable.

[0074] Figure 5 : is a structural block diagram of the dual-system refrigerator pressure-maintaining and energy-saving control device of this embodiment. Figure 5 As shown, the device 50 includes: an acquisition module 51, a first control module 52 and a second control module 53, wherein:

[0075] An acquisition module 51 is used to acquire a refrigerator refrigeration request;

[0076] The first control module 52 is used to switch the valve of the electric valve to the refrigeration side corresponding to the refrigeration request so that the condenser pipe of the refrigerator is depressurized within a preset first time period; thereafter, the compressor is controlled to operate to refrigerate the refrigeration side;

[0077] The second control module 53 is used to control the compressor to stop running after the refrigeration is completed, and switch the valve of the electric valve to the fully closed position to maintain the pressure of the condenser; wherein the valve of the electric valve can be switched to the refrigerator side, the freezer side and the fully closed position.

[0078] It should be noted that the above modules can be functional modules or program modules, and can be implemented by software or hardware. For modules implemented by hardware, the above modules can be located in the same processor; or the above modules can be located in different processors in any combination.

[0079] In this embodiment, an electronic device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor is configured to run the computer program to execute the steps in any one of the above method embodiments.

[0080] Optionally, the electronic device may further include a transmission device and an input / output device, wherein the transmission device is connected to the processor, and the input / output device is connected to the processor.

[0081] Optionally, in this embodiment, the processor may be configured to perform the following steps through a computer program:

[0082] S1, obtain refrigerator cooling request;

[0083] S2, switching the valve of the electric valve to the refrigeration side corresponding to the refrigeration request, so that the condenser pipe of the refrigerator is depressurized within a preset first time period; then, controlling the compressor to operate to refrigerate the refrigeration side;

[0084] S3, after the refrigeration is finished, the compressor is controlled to stop running, and the valve of the electric valve is switched to the fully closed position to maintain the pressure of the condenser; wherein, the valve of the electric valve can be switched to the refrigerator side, the freezer side and the fully closed position.

[0085] It should be noted that the specific examples in this embodiment can refer to the examples described in the above embodiments and optional implementation modes, and will not be repeated in this embodiment.

[0086] In this embodiment, a computer device is also provided, including a memory and a processor, the memory stores a computer program, and when the processor executes the computer program, the steps of any one of the dual-system refrigerator pressure maintaining and energy-saving control methods in the above embodiments are implemented.

[0087] In addition, in combination with the dual-system refrigerator pressure-maintaining and energy-saving control method provided in the above embodiments, a storage medium can also be provided in this embodiment to implement the method. The storage medium stores a computer program; when the computer program is executed by the processor, any dual-system refrigerator pressure-maintaining and energy-saving control method in the above embodiments is implemented.

[0088] It should be understood that the specific embodiments described herein are only used to explain the application, rather than to limit it. Based on the embodiments provided in this application, all other embodiments obtained by ordinary technicians in this field without creative work are within the protection scope of this application.

[0089] It should be noted that the user information (including but not limited to user device information, user personal information, etc.) and data (including but not limited to data used for analysis, stored data, displayed data, etc.) involved in this application are all information and data authorized by the user or fully authorized by all parties.

[0090] Obviously, the drawings are only some examples or embodiments of the present application. For ordinary technicians in the field, the present application can also be applied to other similar situations based on these drawings without creative work. In addition, it is understandable that although the work done in this development process may be complicated and lengthy, for ordinary technicians in the field, certain changes in design, manufacturing or production based on the technical content disclosed in this application are only conventional technical means and should not be regarded as insufficient content disclosed in this application.

[0091] The term "embodiment" in this application refers to a specific feature, structure or characteristic described in conjunction with the embodiment that can be included in at least one embodiment of the present application. The appearance of this phrase in various locations in the specification does not necessarily mean the same embodiment, nor does it mean that it is mutually exclusive with other embodiments and is independent or optional. It is clearly or implicitly understood by those of ordinary skill in the art that the embodiments described in this application can be combined with other embodiments without conflict.

[0092] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetoresistive random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, etc., but are not limited to this.

[0093] The above-mentioned embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of patent protection. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the scope of protection of the present application. Therefore, the scope of protection of the present application shall be subject to the attached claims.

Claims

1. A dual-system refrigerator pressure-maintaining and energy-saving control method, characterized in that: include: Get refrigerator cooling request; Switching the valve of the electric valve to the refrigeration side corresponding to the refrigeration request so that the condenser pipe of the refrigerator is depressurized within a preset first time period; Afterwards, controlling the compressor to operate to cool the refrigeration side; After refrigeration is completed, the compressor is controlled to stop running and the valve of the electric valve is switched to the fully closed position to maintain the pressure of the condenser; wherein the valve of the electric valve can be switched to the refrigerator side, the freezer side and the fully closed position.

2. The dual-system refrigerator pressure-maintaining and energy-saving control method according to claim 1, characterized in that: The method further comprises: If the refrigeration request includes both a refrigeration request and a freezing request, the valve of the electric valve is first switched to the side of the refrigerating chamber, so that the condenser tube is depressurized for a preset first time, and the compressor is controlled to operate to refrigerate the refrigerating chamber; After the refrigeration of the refrigerating chamber is finished, the valve of the electric valve is switched to the freezing chamber side to cool the freezing chamber; When the refrigeration of the freezing chamber is finished, the valve of the electric valve is switched to a fully closed position to maintain the pressure of the condenser tube.

3. The dual-system refrigerator pressure-maintaining and energy-saving control method according to claim 1, characterized in that: After the refrigeration is finished, controlling the compressor to stop running includes: Determine whether the refrigeration evaporator has reached the defrosting condition; If yes, determining whether the speed of the compressor is lower than a preset speed value; If so, the valve of the electric valve is controlled to switch to a fully closed position, the compressor is controlled to operate for a preset second time period, the compressor is controlled to stop operating, and the defrost heating wire is turned on for defrosting.

4. The dual-system refrigerator pressure-maintaining and energy-saving control method according to claim 3, characterized in that: The method further comprises: If the refrigeration evaporator does not meet the defrosting condition, the compressor is controlled to stop running, the valve of the electric valve is switched to a fully closed position, and the pressure of the condenser is maintained.

5. The dual-system refrigerator pressure-maintaining and energy-saving control method according to claim 3, characterized in that: The method further comprises: If the speed of the compressor is higher than a preset speed value, the speed of the compressor is controlled to drop below the preset speed value, the valve of the electric valve is controlled to switch to a fully closed position, and after the compressor is controlled to run for a preset second time period, the compressor is controlled to stop running, and the defrost heating wire is turned on for defrosting.

6. A dual-system refrigerator pressure-maintaining and energy-saving control system, using the dual-system refrigerator pressure-maintaining and energy-saving control method described in any one of claims 1 to 5, characterized in that: The dual-system refrigerator pressure-maintaining and energy-saving control system comprises: A compressor, a condenser, an anti-dew pipe, a drying filter, an electric valve, a refrigeration evaporator and a freezing evaporator; the output end of the compressor is connected to the condenser, the anti-dew pipe, the drying filter, the electric valve, the refrigeration evaporator and the input end of the compressor in sequence; The electric valve is also connected to the input end of the refrigeration evaporator, and the output end of the refrigeration evaporator is connected to the input end of the compressor.

7. A dual-system refrigerator pressure-maintaining and energy-saving control device, characterized in that: include: An acquisition module, a first control module and a second control module, wherein: The acquisition module is used to acquire a refrigerator refrigeration request; The first control module is used to switch the valve of the electric valve to the refrigeration side corresponding to the refrigeration request so that the condenser pipe of the refrigerator is depressurized within a preset first time period; thereafter, the compressor is controlled to operate to refrigerate the refrigeration side; The second control module is used to control the compressor to stop running after refrigeration is completed, and switch the valve of the electric valve to a fully closed position to maintain the pressure of the condenser; wherein the valve of the electric valve can be switched to the refrigerator side, the freezer side and the fully closed position.

8. An electronic device comprising a memory and a processor, characterized in that: A computer program is stored in the memory, and the processor is configured to run the computer program to execute the dual-system refrigerator pressure-maintaining and energy-saving control method according to any one of claims 1 to 5.

9. A computer device comprising a memory and a processor, wherein the memory stores a computer program, wherein: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

10. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the dual-system refrigerator pressure-maintaining and energy-saving control method described in any one of claims 1 to 5 are implemented.

Images