Refrigeration control method and device and storage medium

Abstract

The embodiment of the invention discloses a refrigeration control method and device and a storage medium, and the method comprises the steps that when the temperature of a first storage chamber is higher than a set temperature, a compressor of refrigeration equipment is started to drive a refrigerant of a first circulation system, so that the first circulation system refrigerates first cold carrying liquid in a liquid storage tank; and when the temperature of the first cold carrying liquid is within the first temperature range, the pump body is started to drive the second cold carrying liquid in the second circulation system, so that the second circulation system refrigerates the first storage chamber. By acquiring the temperature of the first storage chamber of the refrigeration equipment, the set temperature and the temperature of the first cold carrying liquid in the liquid storage tank, operation of the first circulation system and the second circulation system is accurately controlled, so that a compressor and a pump body can be reasonably adjusted, frequent start and stop of the compressor are avoided, energy loss can be effectively reduced, temperature fluctuation of the first storage chamber is reduced, and the service life of the refrigeration equipment is prolonged. And the refrigeration stability of the refrigeration equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of refrigeration equipment, and in particular to a refrigeration control method and a device and a storage medium thereof. Background Art

[0002] During the refrigeration process, the refrigeration equipment of the single-system refrigeration system controls the cooling capacity of the evaporator to the storage room by opening the refrigeration damper. Among them, the evaporation temperature of the evaporator in the freezer compartment of the refrigerator is usually lower than -18°C. The cold wind at too low a temperature can easily cause excessive fluctuations in temperature and humidity in the storage room, which is not convenient for the storage of fruits, vegetables and other food ingredients. Existing refrigeration equipment often optimizes the control program by reducing the start-stop difference of the refrigeration system. However, reducing the start-stop difference requires frequent start-stop of the compressor and the refrigeration damper, which will increase the energy consumption of the refrigeration equipment and also affect the service life of the compressor and the refrigeration damper. Summary of the invention

[0003] The purpose of the present invention is to solve at least one of the technical problems existing in the prior art, and to provide a refrigeration control method and its device, and a storage medium, which can effectively avoid the frequent start and stop of the compressor, reduce the temperature fluctuation of the first storage chamber of the refrigeration equipment, and improve the refrigeration stability of the refrigeration equipment.

[0004] In a first aspect, an embodiment of the present invention provides a refrigeration control method, which is applied to a refrigeration device, wherein the refrigeration device includes a first circulation system and a second circulation system, wherein the second circulation system is used to refrigerate a first storage room of the refrigeration device, wherein the second circulation system includes a liquid storage tank and a pump body, and the second circulation system performs heat exchange with the first circulation system through the liquid storage tank;

[0005] The refrigeration control method comprises:

[0006] When the temperature of the first storage chamber is higher than the set temperature, the compressor of the refrigeration equipment is started to drive the refrigerant of the first circulation system, so that the first circulation system refrigerates the first cooling liquid in the liquid storage tank;

[0007] When the temperature of the first coolant is within a first temperature range, the pump is started to drive the second coolant in the second circulation system so that the second circulation system cools the first storage chamber. The first temperature range is determined based on the phase change temperature of the first coolant and the temperature of the first storage chamber.

[0008] The refrigeration control method provided in an embodiment of the present invention has at least the following beneficial effects: by obtaining the temperature of the first storage chamber of the refrigeration equipment, the set temperature, and the temperature of the first coolant, the operation of the first circulation system and the second circulation system can be accurately controlled, so that the compressor and the pump body can be reasonably adjusted according to the temperature of the first storage chamber of the refrigeration equipment, the set temperature, and the temperature of the first coolant, thereby avoiding frequent start and stop of the compressor, effectively reducing energy loss, reducing temperature fluctuations in the first storage chamber of the refrigeration equipment, and improving the refrigeration stability of the refrigeration equipment.

[0009] In the above-mentioned refrigeration control method, the first circulation system also includes a gas-liquid separator and a second storage chamber evaporator for refrigerating the second storage chamber of the refrigeration equipment; the exhaust port of the compressor is connected to the inlet of the gas-liquid separator through the condenser of the refrigeration equipment, the liquid outlet of the gas-liquid separator is connected to the second storage chamber evaporator, and the gas outlet of the gas-liquid separator is connected to the air inlet of the compressor through a heat exchange pipe, and the heat exchange pipe is arranged in the liquid storage tank.

[0010] In the above refrigeration control method, when the temperature of the first storage chamber is higher than the set temperature, starting the compressor of the refrigeration equipment to drive the refrigerant of the first circulation system includes:

[0011] When the temperature of the first storage chamber is greater than the set temperature, and the difference between the temperature of the first storage chamber and the set temperature is greater than a preset first threshold, the compressor of the refrigeration equipment is started.

[0012] In the above-mentioned refrigeration control method, the lower limit value of the first temperature range is the first reference temperature, and the upper limit value of the first temperature range is the second reference temperature; the first reference temperature is determined according to the phase change temperature of the first coolant and a preset second threshold value, and the second reference temperature is determined according to the temperature of the first storage chamber and a preset third threshold value.

[0013] In the above-mentioned refrigeration control method, the first reference temperature is the sum of the phase change temperature of the first coolant and the second threshold, and the second reference temperature is the sum of the temperature of the first storage chamber and the third threshold, wherein the second threshold is greater than or equal to 0, and the third threshold is less than or equal to 0.

[0014] In the above refrigeration control method, after starting the pump body to drive the second cooling liquid in the second circulation system, the method further includes:

[0015] When the temperature of the first cooling liquid is within the first temperature range, setting the start and stop temperatures of the compressor to the start and stop temperatures of the second circulation system;

[0016] When the temperature of the first cooling liquid is greater than the second reference temperature, the start and stop temperatures of the compressor are set to the start and stop temperatures of the first circulation system; wherein the stop temperature of the second circulation system is greater than the stop temperature of the first circulation system, and the start temperature of the first circulation system is greater than the start temperature of the second circulation system.

[0017] In the above refrigeration control method, a solenoid valve is further provided between the gas outlet of the gas-liquid separator and the liquid storage tank;

[0018] After starting the pump to drive the second cooling liquid so that the second circulation system cools the first storage chamber, the method further includes:

[0019] When the temperature of the first cooling liquid exceeds a second temperature range, the solenoid valve is closed so that the first circulation system stops refrigerating the first cooling liquid. The second temperature range is determined according to the phase change temperature of the first cooling liquid and the temperature of the first storage chamber.

[0020] In the above-mentioned refrigeration control method, the lower limit value of the second temperature range is the third reference temperature, and the upper limit value of the second temperature range is the fourth reference temperature; the third reference temperature is determined according to the phase change temperature of the first coolant and a preset fourth threshold value, and the fourth reference temperature is determined according to the temperature of the first storage chamber and a preset fifth threshold value.

[0021] In the above-mentioned refrigeration control method, the third reference temperature is the sum of the phase change temperature of the first coolant and the fourth threshold, and the fourth reference temperature is the sum of the temperature of the first storage chamber and the fifth threshold, wherein the fourth threshold is greater than or equal to 0, and the fifth threshold is less than or equal to 0.

[0022] In the above-mentioned refrigeration control method, the second circulation system also includes a one-way valve and a first storage chamber evaporator for refrigerating the first storage chamber of the refrigeration equipment, the one-way valve is arranged between the pump body and the first storage chamber evaporator, and the direction of the one-way valve is the same as the output direction of the pump body.

[0023] In a second aspect, an embodiment of the present invention provides a refrigeration control device, characterized in that it comprises at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions executable by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the control method as described above.

[0024] The refrigeration control device provided in accordance with the embodiment of the present invention has at least the following beneficial effects: by obtaining the temperature of the first storage chamber of the refrigeration equipment, the set temperature, and the temperature of the first coolant, the operation of the first circulation system and the second circulation system can be accurately controlled, so that the compressor and the pump body can be reasonably adjusted according to the temperature of the first storage chamber of the refrigeration equipment, the set temperature, and the temperature of the first coolant, thereby avoiding frequent start and stop of the compressor, effectively reducing energy loss, reducing temperature fluctuations in the first storage chamber of the refrigeration equipment, and improving the refrigeration stability of the refrigeration equipment.

[0025] In a third aspect, an embodiment of the present invention provides a computer-readable storage medium, characterized in that the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the control method as described above.

[0026] The computer-readable storage medium provided according to the embodiment of the present invention has at least the following beneficial effects: by obtaining the temperature of the first storage chamber of the refrigeration equipment, the set temperature, and the temperature of the first coolant, the operation of the first circulation system and the second circulation system can be accurately controlled, so that the compressor and the pump body can be reasonably adjusted according to the temperature of the first storage chamber of the refrigeration equipment, the set temperature, and the temperature of the first coolant, thereby avoiding frequent start and stop of the compressor, effectively reducing energy loss, reducing temperature fluctuations in the first storage chamber of the refrigeration equipment, and improving the refrigeration stability of the refrigeration equipment.

[0027] Other features and advantages of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The accompanying drawings are used to provide a further understanding of the technical solution of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the technical solution of the present invention and do not constitute a limitation on the technical solution of the present invention.

[0029] Figure 1 is a flow chart of a refrigeration control method provided by an embodiment of the present invention;

[0030] Figure 2 yes Figure 1 The structural principle diagram of the first circulation system and the second circulation system;

[0031] Figure 3 yes Figure 1 A schematic diagram of the structure of the first circulation system and the second circulation system;

[0032] Figure 4 yes Figure 1Flow chart of step S1000;

[0033] Figure 5 yes Figure 1 Flowchart of step S2000;

[0034] Figure 6 yes Figure 1 A flowchart of another embodiment of step S2000;

[0035] Figure 7 yes Figure 1 A graph showing the relationship between the temperature of the first storage room and time;

[0036] Figure 8 It is a schematic diagram of a refrigeration control device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0037] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0038] In the description of the present invention, it should be understood that descriptions involving orientations, such as up, down, front, back, left, right, etc., and orientations or positional relationships indicated are the orientations or positional relationships shown in the accompanying drawings, which are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to 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 invention.

[0039] In the description of the present invention, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed" etc. are understood as not including the number itself, and "above", "below", "within" etc. are understood as including the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0040] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0041] The embodiments of the present invention provide a refrigeration control method, a refrigeration control device and a computer-readable storage medium, which can accurately control the operation of the first circulation system and the second circulation system according to the temperature of the first storage chamber of the refrigeration equipment, the set temperature, and the temperature of the first coolant, so that the compressor and the pump body can be reasonably adjusted according to the temperature of the first storage chamber of the refrigeration equipment, the set temperature, and the temperature of the first coolant, thereby avoiding frequent start and stop of the compressor, effectively reducing energy loss, reducing temperature fluctuations in the first storage chamber of the refrigeration equipment, and improving the refrigeration stability of the refrigeration equipment.

[0042] The embodiments of the present invention are further described below in conjunction with the accompanying drawings.

[0043] See also Figure 1 , Figure 1 FIG. 1 is a flow chart showing a refrigeration control method provided by an embodiment of the first aspect of the present invention. Figure 1 As shown, the refrigeration control method includes the following steps:

[0044] Step S1000: When the temperature of the first storage chamber is higher than the set temperature, the compressor of the refrigeration equipment is started to drive the refrigerant of the first circulation system, so that the first circulation system cools the first cooling liquid in the liquid storage tank.

[0045] It is understandable that before the refrigeration control of the refrigeration equipment is performed, the first circulation system and the second circulation system need to be installed and prepared for operation, such as ensuring that the refrigerant pipelines between the various components of the first circulation system are connected stably; the evaporator, condenser, compressor, and gas-liquid separator of the first circulation system are all operating normally, and the first storage chamber evaporator and pump body of the first circulation system are all operating normally; the connection between the liquid storage tank and the compressor, gas-liquid separator, pump body and the first storage chamber evaporator is stable and reliable, and the second circulation system can exchange heat with the first circulation system through the liquid storage tank; the temperature acquisition unit of the first storage chamber and the liquid storage tank can accurately obtain the temperature of the first storage chamber and the temperature of the first cooling liquid in the liquid storage tank; the switch control unit of the compressor and the switch control unit of the pump body operate normally, and can accurately control the shutdown and startup of the compressor and the pump body. At the same time, when the compressor and the pump body are running, the first circulation system and the second circulation system communicate with the compressor, the pump body, and the temperature acquisition unit to obtain the temperature of the first storage chamber and the temperature of the first cooling liquid in the liquid storage tank in real time.

[0046] See also Figure 2 and Figure 3 , Figure 2 and Figure 3 The schematic diagram and schematic diagram of the structure of the first circulation system and the second circulation system of step S1000 are shown. Figure 2 and Figure 3As shown, the second circulation system is used to refrigerate the first storage room of the refrigeration equipment. The second circulation system includes a liquid storage tank 410 and a pump body 420. The second circulation system performs heat exchange with the first circulation system through the liquid storage tank 410.

[0047] The first circulation system further includes a gas-liquid separator 330 and a second storage chamber evaporator 320 for refrigerating the second storage chamber of the refrigeration equipment; the exhaust port of the compressor 310 is connected to the inlet of the gas-liquid separator 330 through the condenser 340 of the refrigeration equipment, the liquid outlet of the gas-liquid separator 330 is connected to the second storage chamber evaporator 320, and the gas outlet of the gas-liquid separator 330 is connected to the air inlet of the compressor 310 through a heat exchange pipe, and the heat exchange pipe is arranged in the liquid storage tank 410. A solenoid valve 350 is also arranged between the gas outlet of the gas-liquid separator 330 and the liquid storage tank 410. The second circulation system further includes a one-way valve 440 and a first storage chamber evaporator 430 for refrigerating the first storage chamber of the refrigeration equipment, the one-way valve 440 is arranged between the pump body 420 and the first storage chamber evaporator 430, and the direction of the one-way valve 440 is the same as the output direction of the pump body 420.

[0048] In practical applications, the refrigeration device is specifically a refrigerator, the first storage chamber is a cold storage chamber of the refrigerator, and the second storage chamber is a freezer chamber of the refrigerator. In other embodiments, the refrigeration device can also be used in other refrigeration environments, and the first storage chamber and the second storage chamber correspond to storage chambers with different refrigeration requirements, which is not limited here.

[0049] In the present application, the refrigerant in the first circulation system, the first cooling liquid and the second cooling liquid in the second circulation system can use the same working fluid to improve the heat exchange efficiency between the first circulation system and the second circulation system. In practical applications, in order to improve the maintenance convenience of the liquid storage tank, the first cooling liquid can use pure water, which not only ensures the heat exchange efficiency between the first circulation system and the liquid storage tank, but also facilitates the replenishment and replacement of the first cooling liquid.

[0050] It can be understood that the gas-liquid separator 330 is used to separate the gas and liquid refrigerants. By connecting the liquid outlet of the gas-liquid separator 330 to the second storage chamber evaporator 320, the gas outlet of the gas-liquid separator 330 is connected to the air inlet of the compressor 310 through a heat exchange pipe, and the heat exchange pipe is arranged in the liquid storage tank 410. This can effectively increase the proportion of liquid refrigerant with strong heat exchange capacity in the second storage chamber evaporator 320, thereby improving the heat exchange efficiency; at the same time, it can also further improve the refrigeration effect by transmitting the gaseous refrigerant to the liquid storage tank 410 through the heat exchange pipe and refrigerating the first coolant in the liquid storage tank 410.

[0051] It is understandable that when the temperature of the first storage chamber is higher than the set temperature, by obtaining the current temperature of the first storage chamber, the refrigeration demand of the first circulation system can be accurately grasped, and then by adjusting the compressor 310, the temperature in the first storage chamber can be maintained within a suitable temperature range, thereby improving the refrigeration effect of the refrigeration equipment. Since the second circulation system exchanges heat with the first circulation system through the liquid storage tank 410, while the compressor drives the refrigerant of the first circulation system to refrigerate the first storage chamber, the refrigerant passes through the liquid storage tank 410 and refrigerates the first cooling liquid in the liquid storage tank 410, so that a temperature difference is generated between the liquid storage tank 410 in the second circulation system and the evaporator 430 of the first storage chamber, so that the second circulation system can refrigerate the first storage chamber.

[0052] See also Figure 4 , Figure 4 FIG. 5 shows a schematic diagram of a specific implementation process of the above step S1000. Figure 4 As shown, step S1000 at least includes the following steps:

[0053] Step S1100: obtaining the first storage chamber temperature Tr and the set temperature Ts of the refrigeration equipment.

[0054] It is understandable that after obtaining the current first storage chamber temperature Tr through the temperature acquisition component in the first storage chamber of the refrigeration device, the difference between the first storage chamber temperature Tr and the set temperature Ts can be determined. Among them, by obtaining the first storage chamber temperature Tr in real time and determining the set temperature Ts of the refrigeration device, it can be effectively ensured that the first circulation system can refrigerate the first storage chamber according to the first storage chamber temperature Tr, thereby improving the relevance of the first storage chamber temperature Tr to the working state of the compressor.

[0055] Step S1200: when the temperature Tr of the first storage chamber is greater than the set temperature Ts, and the difference between the temperature Tr of the first storage chamber and the set temperature Ts is greater than a preset first threshold value Δt1, start the compressor of the refrigeration equipment.

[0056] It is understandable that in order to ensure the refrigeration effect of the first storage room of the refrigeration equipment, the preset first threshold value Δt1 is used to ensure that the temperature Tr of the first storage room is greater than the set temperature Ts and the difference between the temperature of the first storage room and the set temperature reaches the first threshold value Δt1, and then the compressor of the refrigeration equipment is started for refrigeration. In practical applications, the first threshold value Δt1 is 3°C. When the difference between the temperature of the first storage room and the set temperature is greater than 3°C, that is, Tr-Ts>Δt1=3°C is satisfied, the compressor of the refrigeration equipment is started, and the refrigerant is driven to circulate in the first circulation system, and the first circulation system refrigerates the first storage room of the refrigeration equipment. It is understandable that the process of the first circulation system refrigerating the first storage room of the refrigeration equipment according to the change of the temperature of the first storage room belongs to the prior art and will not be repeated here.

[0057] Step S2000: When the temperature Tz of the first coolant is in the first temperature range, start the pump to drive the second coolant in the second circulation system so that the second circulation system cools the first storage chamber. The first temperature range is determined according to the phase change temperature Th of the first coolant and the temperature Tr of the first storage chamber.

[0058] It is understandable that after obtaining the current temperature Tz of the first cooling liquid in the storage tank through the temperature acquisition component in the storage tank of the second circulation system, the relationship between the temperature Tz of the first cooling liquid in the storage tank and the phase change temperature Th of the first cooling liquid can be determined. Among them, the phase change temperature refers to the critical temperature when a substance changes between different phases, such as the phase change temperature of water turning into ice is 0°C. Therefore, in order to ensure the working efficiency of the second circulation system and avoid the first cooling liquid from changing its form and causing the second circulation system to fail to operate normally, by comparing the current temperature Tz of the first cooling liquid with the phase change temperature Th of the first cooling liquid, when the temperature Tz of the first cooling liquid is higher than the phase change temperature Th of the first cooling liquid, that is, when the first cooling liquid is kept in liquid state, the pump body is started to drive the second cooling liquid to circulate between the storage tank and the evaporator of the first storage chamber, so as to ensure that the second circulation system performs stable and rapid cooling of the first storage chamber. By acquiring the temperature Tz of the first coolant in the liquid storage tank in real time and determining the phase change temperature Th of the first coolant, it can be effectively ensured that the second circulation system can stably cool the first storage chamber, thereby improving the correlation between the temperature Tz of the first coolant in the liquid storage tank and the working state of the pump body.

[0059] In this embodiment, the lower limit value of the first temperature range is the first reference temperature, and the upper limit value of the first temperature range is the second reference temperature; the first reference temperature is determined according to the phase change temperature of the first cooling liquid and the preset second threshold value Δt2, and the second reference temperature is determined according to the first storage chamber temperature and the preset third threshold value Δt3.

[0060] In actual applications, the first reference temperature is the sum of the phase change temperature Th of the first cooling liquid and the second threshold Δt2, and the second reference temperature is the sum of the first storage chamber temperature Tr and the third threshold Δt3, wherein the second threshold Δt2 is greater than or equal to 0, and the third threshold Δt3 is less than or equal to 0.

[0061] It can be understood that the pump body is started to drive the second cooling liquid only when the temperature Tz of the first cooling liquid satisfies the following formula:

[0062] Th+Δt2≤Tz≤Tr+Δt3

[0063] Specifically, the second threshold and the third threshold are 1°C and -1°C respectively, that is, Δt2=1°C, Δt3=-1°C, and the specific value range of the temperature Tz of the first cooling liquid is obtained as follows:

[0064] Th+1℃≤Tz≤Tr-1℃

[0065] See also Figure 5 , Figure 5 FIG. 5 shows a schematic diagram of a specific implementation process of the above step S2000. Figure 5 As shown, step S2000 at least includes the following steps:

[0066] Step S2100: When the temperature Tz of the first cooling liquid is within the first temperature range, the start and stop temperatures of the compressor are set to the start and stop temperatures of the second circulation system.

[0067] It is understandable that the existing refrigeration equipment determines whether to start the compressor to refrigerate the first storage room and the second storage room according to whether the temperature of the first storage room and the temperature of the second storage room reach the preset start-stop temperature. Specifically, when the temperature of the first storage room is higher than the start-up temperature, the first storage room requests refrigeration, and when the temperature of the first storage room is lower than the shutdown temperature, the first storage room stops requesting refrigeration; when the temperature of the second storage room is higher than the start-up temperature, the second storage room requests refrigeration, and when the temperature of the second storage room is lower than the shutdown point, the second storage room stops requesting refrigeration. Therefore, the start-stop temperature of the existing refrigeration equipment has a large variation range, which will cause the compressor to start frequently, affecting the energy consumption and service life of the refrigeration equipment.

[0068] The embodiment of the present application monitors the temperature Tz of the first coolant in the liquid storage tank in real time, so that the temperature Tz of the first coolant in the liquid storage tank is within different ranges, and the start and stop temperatures of the compressor are selected from the start and stop temperatures of different circulation systems to avoid frequent start and stop of the compressor, which can effectively reduce energy loss, reduce temperature fluctuations in the first storage chamber of the refrigeration equipment, and improve the refrigeration stability of the refrigeration equipment.

[0069] Specifically, when the temperature Tz of the first cooling liquid in the storage tank is within the first temperature range, the start-stop temperature of the compressor is the start-stop temperature of the second circulation system. That is, when the temperature Tz of the first cooling liquid in the storage tank satisfies the formula Th+Δt2≤Tz≤Tr+Δt3, when the temperature Tr of the first storage chamber is lower than the preset shutdown temperature Tyt of the first circulation system, the compressor and pump body of the refrigeration equipment are turned off, and the first circulation system and the second circulation system stop refrigeration; when the temperature Tr of the first storage chamber is higher than the preset startup temperature Tyk of the first circulation system, the compressor and pump body of the refrigeration equipment are started, and the first circulation system and the second circulation system start refrigeration according to the above step S1000.

[0070] Step S2200: When the temperature of the first cooling liquid is greater than the second reference temperature, the start and stop temperatures of the compressor are set to the start and stop temperatures of the first circulation system; wherein the stop temperature of the second circulation system is greater than the stop temperature of the first circulation system, and the start temperature of the first circulation system is greater than the start temperature of the second circulation system.

[0071] It can be understood that when the temperature Tz of the first cooling liquid is greater than the second reference temperature, the start-stop temperature of the compressor is the start-stop temperature of the first circulation system. That is, when the temperature Tz of the first cooling liquid in the storage tank satisfies the formula Tz>Tr+Δt3, when the temperature Tr of the first storage chamber is lower than the preset stop temperature Tst of the second circulation system, the compressor and the pump body are turned off, and the first circulation system and the second circulation system stop refrigeration; when the temperature Tr of the first storage chamber is higher than the preset start temperature Tsk of the first circulation system, the compressor and the pump body are started, and the first circulation system and the second circulation system start refrigeration according to the above step S1000.

[0072] See also Figure 7 , Figure 7 The relationship between the temperature Tr of the first storage chamber and time is shown. Since the shutdown temperature Tyt of the second circulation system is greater than the shutdown temperature Tst of the first circulation system, and the startup temperature Tsk of the first circulation system is greater than the startup temperature Tyk of the second circulation system, that is, Tyt>Tst, Tsk>Tyk, it can be ensured that when the temperature Tz of the first cooling liquid in the storage tank is within the first temperature range, the large fluctuation period of the temperature Tr of the first storage chamber of the refrigeration equipment is significantly shortened, especially when the temperature Tz of the first cooling liquid is within the first temperature range, the fluctuation range of the temperature Tr of the first storage chamber of the refrigeration equipment is significantly reduced, thereby improving the stability of the temperature of the first storage chamber of the refrigeration equipment.

[0073] See also Figure 6 , Figure 6 FIG. 5 shows a schematic diagram of a specific implementation process of the above step S2000. Figure 6As shown, step S2000 at least further includes the following steps:

[0074] Step S2300: When the temperature of the first cooling liquid exceeds the second temperature range, the solenoid valve 350 is closed to stop the first circulation system from cooling the first cooling liquid. The second temperature range is determined according to the phase change temperature Th of the first cooling liquid and the first storage chamber temperature Tr.

[0075] It is understandable that, since the second circulation system exchanges heat with the first circulation system through the liquid storage tank, that is, the first circulation system keeps cooling the liquid storage tank during the working time of the above steps, that is, the gaseous refrigerant keeps exchanging heat with the liquid storage tank. In order to prevent the first cooling liquid in the liquid storage tank 410 from freezing due to excessively low temperature, it is necessary to detect the temperature Tz of the first cooling liquid. When Tz exceeds the second temperature range, the solenoid valve 350 is closed to stop the first circulation system from cooling the first cooling liquid in the liquid storage tank, thereby achieving the purpose of antifreeze.

[0076] It is understandable that the second temperature range is determined according to the phase change temperature Th of the first cooling liquid and the temperature Tr of the first storage chamber, which can effectively ensure the working efficiency of the second circulation system and prevent the first cooling liquid from changing its form and causing the second circulation system to be unable to operate normally. By comparing the current temperature Tz of the first cooling liquid with the phase change temperature Th of the first cooling liquid, when the temperature Tz of the first cooling liquid is lower than the phase change temperature Th of the first cooling liquid, that is, when the cooling liquid cannot remain in a liquid state, the solenoid valve 350 is closed to prevent the refrigerant from being transmitted between the gas-liquid separator 330 and the liquid storage tank 410, and the first circulation system is stopped from refrigerating the first cooling liquid in the liquid storage tank 410. By obtaining the temperature Tz of the first cooling liquid in real time and determining the phase change temperature Th of the first cooling liquid, it is possible to effectively ensure that the first cooling liquid in the liquid storage tank 410 remains in a liquid state and prevent the first cooling liquid from freezing due to excessively low temperature.

[0077] It can be understood that when the temperature Tz of the first coolant is greater than the temperature Tr of the first storage chamber, since the pump body 420 is in a closed state, the first coolant in the second circulation system stops circulating. At this time, the first circulation system continues to cool the first coolant, wasting the electrical energy of the refrigeration equipment. Therefore, it is necessary to stop cooling the first coolant in the liquid storage tank 410 by closing the solenoid valve 350 to reduce the energy consumption of the compressor 310.

[0078] Step S2400: The lower limit value of the second temperature range is the third reference temperature, and the upper limit value of the second temperature range is the fourth reference temperature; the third reference temperature is determined according to the phase change temperature Th of the first coolant and the preset fourth threshold value Δt4, and the fourth reference temperature is determined according to the first storage chamber temperature Tr and the preset fifth threshold value Δt5.

[0079] It can be understood that in order to ensure the antifreeze effect of the liquid storage tank 410 and not affect the heat exchange between the second circulation system and the first circulation system through the liquid storage tank 410 in the above step S2000, it is necessary to ensure that the second temperature range is greater than the first temperature range. Specifically, the lower limit value of the second temperature range is the third reference temperature, and the upper limit value of the second temperature range is the fourth reference temperature; the third reference temperature is determined according to the phase change temperature Th of the first coolant and the preset fourth threshold Δt4, and the fourth reference temperature is determined according to the first storage chamber temperature Tr and the preset fifth threshold Δt5.

[0080] Step S2500: The third reference temperature is the sum of the phase change temperature of the first cooling liquid and the fourth threshold value, and the fourth reference temperature is the sum of the first storage chamber temperature and the fifth threshold value, wherein the fourth threshold value is greater than or equal to 0, and the fifth threshold value is less than or equal to 0.

[0081] It can be understood that the third reference temperature is the sum of the phase change temperature Th of the first cooling liquid and the fourth threshold value Δt4, and the fourth reference temperature is the sum of the first storage chamber temperature Tr and the fifth threshold value Δt5, wherein the fourth threshold value Δt4 is greater than or equal to 0, and the fifth threshold value Δt5 is less than or equal to 0. That is, the second temperature range can be expressed by the following formula:

[0082] Th+Δt4≤Tz≤Tr+Δt5

[0083] It can be understood that, since the first circulation system stops refrigerating the first cooling liquid when the temperature of the first cooling liquid exceeds the second temperature range, the solenoid valve 350 is closed when the temperature Tz of the first cooling liquid in the liquid storage tank satisfies the following formula:

[0084] Tz<Th+Δt4, or Tz>Tr+Δt5

[0085] Specifically, the fourth threshold Δt4 and the fifth threshold Δt5 are respectively set to 0 and -1°C, that is, Δt4=0, Δt5=-1°C, and the specific value range of the temperature Tz of the first cooling liquid is obtained as follows:

[0086] Tz<Th, or Tz>Tr-1℃

[0087] Reference Figure 2 and Figure 3 A one-way valve 440 is disposed between the pump body 420 and the first storage chamber evaporator 430 , and the direction of the one-way valve 440 is the same as the output direction of the pump body 420 .

[0088] It can be understood that a one-way valve is a valve in which the fluid can only flow along the water inlet, but the medium at the water outlet cannot flow back. A one-way valve, also known as a check valve or a non-return valve, is used in hydraulic systems to prevent the reverse flow of oil, or in pneumatic systems to prevent the reverse flow of compressed air. One-way valves can be divided into passive and active types according to their working mode. Passive valves rely on the external force of the medium to generate movement and then complete closure and conduction. Usually, the flow direction of the medium is marked on the valve body. The active one-way valve contains components such as an electromagnet and a valve core spring, and the one-way valve needs to be electrically controlled to open or close.

[0089] It is understandable that, in the process of the pump body 420 driving the second cooling liquid so that the second circulation system refrigerates the first storage chamber, in order to ensure that the second cooling liquid can stably and quickly circulate between the storage tank 410 and the first storage chamber evaporator 430 along the output direction of the pump body 420, a one-way valve 440 needs to be provided between the pump body 420 and the first storage chamber evaporator 430 to prevent the second cooling liquid from flowing back and affecting the refrigeration effect of the second circulation system. At the same time, when the pump body 420 stops working, the one-way valve 440 can prevent the second cooling liquid from flowing back from the first storage chamber evaporator 430 into the pump body 420, causing the working temperature of the pump body 420 to fluctuate too much, affecting the working stability of the pump body 420.

[0090] Reference Figure 8 The second aspect of the present invention also provides a refrigeration control device 500, including at least one control processor 510 and a memory 520 for communicating with the at least one control processor 510; the memory 520 stores instructions that can be executed by the at least one control processor 510, and the instructions are executed by the at least one control processor 510 so that the at least one control processor 510 can execute the refrigeration control method as described above.

[0091] The refrigeration control device provided in accordance with the embodiment of the present invention has at least the following beneficial effects: by obtaining the temperature of the first storage chamber, the set temperature, and the temperature of the first coolant of the refrigeration equipment, the operation of the first circulation system and the second circulation system can be accurately controlled, so that the compressor and the pump body can be reasonably adjusted according to the temperature of the first storage chamber, the set temperature, and the temperature of the first coolant of the refrigeration equipment, thereby avoiding frequent start and stop of the compressor, effectively reducing energy loss, reducing temperature fluctuations in the first storage chamber of the refrigeration equipment, and improving the refrigeration stability of the refrigeration equipment.

[0092] In a third aspect, an embodiment of the present invention provides a computer-readable storage medium, characterized in that the computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the control method of the embodiment of the first aspect.

[0093] The computer-readable storage medium provided according to the embodiment of the present invention has at least the following beneficial effects: by obtaining the temperature of the first storage chamber, the set temperature, and the temperature of the first coolant of the refrigeration equipment, the operation of the first circulation system and the second circulation system can be accurately controlled, so that the compressor and the pump body can be reasonably adjusted according to the temperature of the first storage chamber, the set temperature, and the temperature of the first coolant of the refrigeration equipment, thereby avoiding frequent start and stop of the compressor, effectively reducing energy loss, reducing temperature fluctuations in the first storage chamber of the refrigeration equipment, and improving the refrigeration stability of the refrigeration equipment.

[0094] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically include computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0095] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0096] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the claims and their equivalents.

Claims

1. A refrigeration control method, characterized in that: Applied to a refrigeration device, the refrigeration device comprises a first circulation system and a second circulation system, the second circulation system is used to refrigerate a first storage room of the refrigeration device, the second circulation system comprises a liquid storage tank and a pump body, and the second circulation system performs heat exchange with the first circulation system through the liquid storage tank; The refrigeration control method comprises: When the temperature of the first storage chamber is higher than the set temperature, the compressor of the refrigeration equipment is started to drive the refrigerant of the first circulation system, so that the first circulation system refrigerates the first cooling liquid in the liquid storage tank; When the temperature of the first coolant is within a first temperature range, the pump is started to drive the second coolant in the second circulation system so that the second circulation system cools the first storage chamber. The first temperature range is determined based on the phase change temperature of the first coolant and the temperature of the first storage chamber.

2. The method according to claim 1, characterized in that The first circulation system also includes a gas-liquid separator and a second storage chamber evaporator for cooling the second storage chamber of the refrigeration equipment; the exhaust port of the compressor is connected to the inlet of the gas-liquid separator through the condenser of the refrigeration equipment, the liquid outlet of the gas-liquid separator is connected to the second storage chamber evaporator, and the gas outlet of the gas-liquid separator is connected to the air inlet of the compressor through a heat exchange pipe, and the heat exchange pipe is arranged in the liquid storage tank.

3. The method according to claim 2, characterized in that When the temperature of the first storage chamber is higher than the set temperature, starting the compressor of the refrigeration equipment to drive the refrigerant of the first circulation system includes: When the temperature of the first storage chamber is greater than the set temperature, and the difference between the temperature of the first storage chamber and the set temperature is greater than a preset first threshold, the compressor of the refrigeration equipment is started.

4. The method according to claim 1, characterized in that: The lower limit value of the first temperature range is a first reference temperature, and the upper limit value of the first temperature range is a second reference temperature; the first reference temperature is determined according to the phase change temperature of the first cooling liquid and a preset second threshold value, and the second reference temperature is determined according to the temperature of the first storage chamber and a preset third threshold value.

5. The method according to claim 4, characterized in that The first reference temperature is the sum of the phase change temperature of the first coolant and the second threshold, and the second reference temperature is the sum of the temperature of the first storage chamber and the third threshold, wherein the second threshold is greater than or equal to 0, and the third threshold is less than or equal to 0.

6. The method according to claim 4, characterized in that After starting the pump body to drive the second cooling liquid in the second circulation system, the method further includes: When the temperature of the first cooling liquid is within the first temperature range, setting the start and stop temperatures of the compressor to the start and stop temperatures of the second circulation system; When the temperature of the first cooling liquid is greater than the second reference temperature, the start and stop temperatures of the compressor are set to the start and stop temperatures of the first circulation system; wherein the stop temperature of the second circulation system is greater than the stop temperature of the first circulation system, and the start temperature of the first circulation system is greater than the start temperature of the second circulation system.

7. The method according to claim 2, characterized in that: A solenoid valve is also provided between the gaseous outlet of the gas-liquid separator and the liquid storage tank; After starting the pump to drive the second cooling liquid so that the second circulation system cools the first storage chamber, the method further includes: When the temperature of the first cooling liquid exceeds a second temperature range, the solenoid valve is closed so that the first circulation system stops refrigerating the first cooling liquid. The second temperature range is determined according to the phase change temperature of the first cooling liquid and the temperature of the first storage chamber.

8. The method according to claim 7, characterized in that The lower limit value of the second temperature range is a third reference temperature, and the upper limit value of the second temperature range is a fourth reference temperature; the third reference temperature is determined according to the phase change temperature of the first cooling liquid and a preset fourth threshold value, and the fourth reference temperature is determined according to the temperature of the first storage chamber and a preset fifth threshold value.

9. The method according to claim 8, characterized in that The third reference temperature is the sum of the phase change temperature of the first cooling liquid and the fourth threshold, and the fourth reference temperature is the sum of the temperature of the first storage chamber and the fifth threshold, wherein the fourth threshold is greater than or equal to 0, and the fifth threshold is less than or equal to 0.

10. The method according to claim 1, characterized in that The second circulation system also includes a one-way valve and a first storage chamber evaporator for refrigerating the first storage chamber of the refrigeration equipment. The one-way valve is arranged between the pump body and the first storage chamber evaporator, and the direction of the one-way valve is the same as the output direction of the pump body.

11. A refrigeration control device, characterized in that: It includes at least one control processor and a memory for communicating with the at least one control processor; the memory stores instructions that can be executed by the at least one control processor, and the instructions are executed by the at least one control processor so that the at least one control processor can execute the control method as described in any one of claims 1 to 10.

12. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores computer-executable instructions, and the computer-executable instructions are used to enable a computer to execute the control method according to any one of claims 1 to 10.

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