Refrigeration control method and apparatus therefor, storage medium

Abstract

The embodiment of the application discloses a refrigeration control method and device and a storage medium, and the method comprises the following steps: when the temperature of a first storage chamber is higher than a set temperature, starting a compressor of a refrigeration device to drive refrigerant of a first circulating system, so that the first circulating system performs refrigeration on first cold-carrying liquid in a liquid storage tank; when the temperature of the first cold-carrying liquid is in a first temperature range, starting a pump body to drive second cold-carrying liquid in a second circulating system, so that the second circulating system performs refrigeration on the first storage chamber. By acquiring the temperature of the first storage chamber of the refrigeration device, the set temperature and the temperature of the first cold-carrying liquid in the liquid storage tank, the first circulating system and the second circulating system are accurately controlled to operate, so that the compressor and the pump body can be reasonably adjusted, the frequent start-stop of the compressor is avoided, energy consumption can be effectively reduced, the temperature fluctuation of the first storage chamber is reduced, and the stability of refrigeration of the refrigeration device is improved.

Description

TECHNICAL FIELD

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

[0002] In the refrigeration process of the refrigeration equipment of the single-system refrigeration system, the refrigeration amount of the evaporator to the storage room is controlled by opening the refrigeration door. The evaporating temperature of the freezer evaporator of the refrigerator is usually lower than-18℃, and the cold air with too low temperature is easy to cause the temperature and humidity in the storage room to fluctuate too much, which is not convenient for the storage of food materials such as fruits and vegetables. The existing refrigeration equipment often optimizes the control program by reducing the start-stop difference of the refrigeration system, but reducing the start-stop point difference requires frequent start-stop of the compressor and the refrigeration door, which will lead to the increase of the energy consumption of the refrigeration equipment, and also affects the service life of the compressor and the refrigeration door. SUMMARY

[0003] The present application aims to at least solve one of the technical problems in the prior art, and provides a refrigeration control method and device thereof, and a storage medium, which can effectively avoid the frequent start-stop of the compressor, reduce the temperature fluctuation of the first storage room of the refrigeration equipment, and improve the stability of the refrigeration of the refrigeration equipment.

[0004] In a first aspect, an embodiment of the present application provides a refrigeration control method applied to a refrigeration equipment, wherein the refrigeration equipment comprises a first circulation system and a second circulation system, the second circulation system is used for refrigerating a first storage room of the refrigeration equipment, the second circulation system comprises a liquid storage tank and a pump body, and the second circulation system exchanges heat with the first circulation system through the liquid storage tank.

[0005] The refrigeration control method comprises the following steps.

[0006] When the temperature of the first storage room is higher than a set temperature, a 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 cold-carrying liquid in the liquid storage tank.

[0007] When the temperature of the first cold-carrying liquid is in a 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 room, and the first temperature range is determined according to the phase change temperature of the first cold-carrying liquid and the temperature of the first storage room.

[0008] The refrigeration control method provided by the embodiment of the present application has at least the following beneficial effects: the first circulating system and the second circulating system are accurately controlled by acquiring the temperature of the first storage chamber of the refrigeration equipment, the set temperature and the temperature of the first cold carrier liquid, 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 cold carrier liquid, the frequent start-stop of the compressor is avoided, the energy consumption is effectively reduced, the temperature fluctuation of the first storage chamber of the refrigeration equipment is reduced, and the stability of the refrigeration of the refrigeration equipment is improved.

[0009] In the above refrigeration control method, the first circulating system further comprises a gas-liquid separator and a second storage chamber evaporator for refrigerating a 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, the gaseous outlet of the gas-liquid separator is connected to the air inlet of the compressor through a heat exchange pipeline, and the heat exchange pipeline 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, the compressor of the refrigeration equipment is started to drive the refrigerant of the first circulating system, comprising:

[0011] In the case that 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 value, the compressor of the refrigeration equipment is started.

[0012] In the above refrigeration control method, 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 cold carrier 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.

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

[0014] In the above refrigeration control method, after the pump body is started to drive the second cold carrier liquid in the second circulating system, the method further comprises:

[0015] When the temperature of the first cold carrier liquid is in the first temperature range, the start-stop temperature of the compressor is set to the start-stop temperature of the second circulating system.

[0016] When the temperature of the first cold carrier liquid is greater than the second reference temperature, set the start-stop temperature of the compressor to the start-stop temperature 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, an electromagnetic valve is further arranged between the gaseous outlet of the gas-liquid separator and the liquid storage tank.

[0018] After the starting of the pump body drives the second cold carrier liquid to make the second circulation system refrigerate the first storage room, the method further comprises:

[0019] When the temperature of the first cold carrier liquid exceeds a second temperature range, the electromagnetic valve is closed to stop the first circulation system from refrigerating the first cold carrier liquid, and the second temperature range is determined according to the phase transition temperature of the first cold carrier liquid and the temperature of the first storage room.

[0020] In the above refrigeration control method, 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 transition temperature of the first cold carrier liquid and a preset fourth threshold value, and the fourth reference temperature is determined according to the temperature of the first storage room and a preset fifth threshold value.

[0021] In the above refrigeration control method, the third reference temperature is the sum of the phase transition temperature of the first cold carrier liquid and the fourth threshold value, and the fourth reference temperature is the sum of the temperature of the first storage room 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.

[0022] In the above refrigeration control method, the second circulation system further comprises a one-way valve and a first storage room evaporator for refrigerating the first storage room of the refrigeration device, the one-way valve is arranged between the pump body and the first storage room 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 application provides a refrigeration control device, characterized in that it comprises at least one control processor and a memory connected in communication 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 to enable the at least one control processor to execute the control method as described above.

[0024] The refrigeration control device provided by the embodiment of the present application has at least the following beneficial effects: the temperature of the first storage chamber of the refrigeration equipment, the set temperature and the temperature of the first cold carrier liquid are obtained, the first circulation system and the second circulation system are accurately controlled to operate, 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 cold carrier liquid, the frequent start and stop of the compressor is avoided, the energy consumption can be effectively reduced, the temperature fluctuation of the first storage chamber of the refrigeration equipment is reduced, and the stability of the refrigeration of the refrigeration equipment is improved.

[0025] In a third aspect, the embodiment of the present application 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 make a computer execute the control method.

[0026] The computer readable storage medium provided by the embodiment of the present application has at least the following beneficial effects: the temperature of the first storage chamber of the refrigeration equipment, the set temperature and the temperature of the first cold carrier liquid are obtained, the first circulation system and the second circulation system are accurately controlled to operate, 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 cold carrier liquid, the frequent start and stop of the compressor is avoided, the energy consumption can be effectively reduced, the temperature fluctuation of the first storage chamber of the refrigeration equipment is reduced, and the stability of the refrigeration of the refrigeration equipment is improved.

[0027] Other features and advantages of the present application will be set forth in the following description, and in part will become apparent to those skilled in the art from the description, or can be learned by practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the structure particularly pointed out in the description, claims and drawings. BRIEF DESCRIPTION OF DRAWINGS

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

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

[0030] Figure 2 is Figure 1 is a structural principle diagram of the first circulation system and the second circulation system in the embodiment;

[0031] Figure 3 is Figure 1 is a structural schematic diagram of the first circulation system and the second circulation system in the embodiment;

[0032] Figure 4 is Figure 1Flowchart of step S1000;

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

[0034] Figure 6 is Figure 1 Flowchart of another embodiment of step S2000;

[0035] Figure 7 is Figure 1 Graph of temperature and time in the first storage compartment;

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

[0037] Embodiments of the present application are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference signs represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0038] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by up, down, front, back, left, right, etc. is the orientation or position relationship shown in the drawings, which is only for the purpose of describing the present application and simplifying the description, and does not indicate or imply that the device or element indicated must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0039] In the description of the present application, the meaning of several is one or more, and the meaning of multiple is more than two, greater than, less than, more than, etc. are understood as not including the number, and above, below, etc. are understood as including the number. If the first, second, etc. are described, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features or the order of indicated technical features.

[0040] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting, etc. should be broadly understood, and the person skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0041] The embodiment of the present application provides a refrigeration control method, a refrigeration control device and a computer readable storage medium, which can accurately control the first circulating system and the second circulating system to operate according to the first storage room temperature, the set temperature and the temperature of the first cold carrier liquid of the refrigeration equipment, so that the compressor and the pump body can be reasonably adjusted according to the first storage room temperature, the set temperature and the temperature of the first cold carrier liquid of the refrigeration equipment, the frequent start and stop of the compressor is avoided, the energy consumption can be effectively reduced, the temperature fluctuation of the first storage room of the refrigeration equipment is reduced, and the stability of the refrigeration of the refrigeration equipment is improved.

[0042] The embodiment of the present application is further described below with reference to the drawings.

[0043] Please refer to Figure 1 , Figure 1 The first aspect embodiment of the present application shows a flow chart of a refrigeration control method. As shown in Figure 1 , the refrigeration control method comprises the following steps:

[0044] Step S1000: when the temperature of the first storage room is higher than the set temperature, the compressor of the refrigeration equipment is started to drive the refrigerant of the first circulating system, so that the first circulating system performs refrigeration on the first cold carrier liquid in the liquid tank.

[0045] It can be understood that before the refrigeration control of the refrigeration equipment, the first circulating system and the second circulating system need to be installed and be prepared for operation, such as ensuring that the refrigerant pipeline connection between the components of the first circulating system is stable; the evaporator, the condenser, the compressor and the gas-liquid separator of the first circulating system are normally operated, the first storage room evaporator and the pump body of the first circulating system are normally operated; the connection between the liquid tank and the compressor, the gas-liquid separator, the pump body and the first storage room evaporator is stable and reliable, the second circulating system can exchange heat with the first circulating system through the liquid tank; the temperature acquisition unit of the first storage room and the liquid tank can accurately obtain the temperature of the first storage room and the temperature of the first cold carrier liquid in the liquid tank; the switch control unit of the compressor and the switch control unit of the pump body are normally operated and can accurately control the shutdown and start of the compressor and the pump body. At the same time, when the compressor and the pump body are operated, the first circulating system and the second circulating system communicate with the compressor, the pump body and the temperature acquisition unit to obtain the temperature of the first storage room and the temperature of the first cold carrier liquid in the liquid tank in real time.

[0046] Please refer to Figure 2 and Figure 3 , Figure 2 and Figure 3 The structure principle diagram and the structure schematic diagram of the first circulating system and the second circulating system of the above step S1000 are shown. As Figure 2 and Figure 3As shown, the second circulation system is used for refrigerating the first storage room of the refrigeration device, and the second circulation system comprises the liquid storage tank 410 and the pump body 420, and the second circulation system exchanges heat with the first circulation system through the liquid storage tank 410.

[0047] The first circulation system further comprises a gas-liquid separator 330 and a second storage room evaporator 320 used for refrigerating the second storage room of the refrigeration device; 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 device, the liquid outlet of the gas-liquid separator 330 is connected to the second storage room evaporator 320, the gaseous outlet of the gas-liquid separator 330 is connected to the air inlet of the compressor 310 through the heat exchange pipeline, and the heat exchange pipeline is arranged in the liquid storage tank 410. An electromagnetic valve 350 is further arranged between the gaseous outlet of the gas-liquid separator 330 and the liquid storage tank 410. The second circulation system further comprises a one-way valve 440 and a first storage room evaporator 430 used for refrigerating the first storage room of the refrigeration device, and the one-way valve 440 is arranged between the pump body 420 and the first storage room 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 actual application, the refrigeration device is specifically a refrigerator, the first storage room is a refrigerating chamber of the refrigerator, and the second storage room is a freezing chamber of the refrigerator. In other embodiments, the refrigeration device can also be applied to other refrigeration environments, and the first storage room and the second storage room correspond to storage rooms with different refrigeration requirements, which are not limited herein.

[0049] In the present application, the refrigerant in the first circulation system, the first cold carrier liquid in the second circulation system and the second cold carrier liquid can adopt the same working fluid, so as to improve the heat exchange efficiency between the first circulation system and the second circulation system. In actual application, in order to improve the maintenance convenience of the liquid storage tank, the first cold carrier liquid can adopt pure water, so as to ensure the heat exchange efficiency between the first circulation system and the liquid storage tank, and facilitate the replenishment and replacement of the first cold carrier liquid.

[0050] It can be understood that the gas-liquid separator 330 is used for separating the refrigerant in gas and liquid states, the liquid outlet of the gas-liquid separator 330 is connected to the second storage room evaporator 320, the gaseous outlet of the gas-liquid separator 330 is connected to the air inlet of the compressor 310 through the heat exchange pipeline, and the heat exchange pipeline is arranged in the liquid storage tank 410, so as to effectively improve the proportion of the liquid refrigerant with strong heat exchange capacity in the second storage room evaporator 320, thereby improving the heat exchange efficiency; at the same time, the gaseous refrigerant can also be transmitted into the liquid storage tank 410 through the heat exchange pipeline and used for refrigerating the first cold carrier liquid in the liquid storage tank 410, thereby further improving the refrigeration effect.

[0051] It can be understood that in the case that the first storage chamber temperature is higher than the set temperature, the refrigeration demand of the first circulation system can be accurately grasped by obtaining the current first storage chamber temperature, and then the compressor 310 is adjusted to ensure that 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, the refrigerant driven by the compressor to cool the first storage chamber passes through the liquid storage tank 410, and the first cold-carrying liquid in the liquid storage tank 410 is cooled at the same time, so that the liquid storage tank 410 in the second circulation system and the first storage chamber evaporator 430 generate a temperature difference, so as to facilitate the second circulation system to cool the first storage chamber.

[0052] Please refer to Figure 4 , Figure 4 A specific implementation process diagram of the above step S1000 is shown. As Figure 4 shown, step S1000 at least includes the following steps:

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

[0054] It can be understood that after the current first storage chamber temperature Tr is obtained by the temperature collecting component in the first storage chamber of the refrigeration equipment, the difference between the first storage chamber temperature Tr and the set temperature Ts can be determined. By obtaining the first storage chamber temperature Tr in real time and determining the set temperature Ts of the refrigeration equipment, the first circulation system can effectively cool 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: In the case that 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 the first preset threshold value Δt1, start the compressor of the refrigeration equipment.

[0056] It can be understood that, in order to ensure the refrigeration effect of the first storage chamber of the refrigeration equipment, the compressor of the refrigeration equipment is started to perform refrigeration when the preset first threshold At1 is reached, that is, 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 reaches the first threshold At1. In practical applications, the first threshold At1 is 3°C, and when the difference between the temperature Tr of the first storage chamber and the set temperature Ts is greater than 3°C, that is, Tr-Ts>At1=3°C, the compressor of the refrigeration equipment is started to drive the refrigerant to circulate in the first circulation system, and the first circulation system performs refrigeration on the first storage chamber of the refrigeration equipment. It can be understood that, according to the change of the temperature of the first storage chamber, the process of the first circulation system performing refrigeration on the first storage chamber of the refrigeration equipment belongs to the prior art, and will not be described here.

[0057] Step S2000: When the temperature Tz of the first cold carrier liquid is in the first temperature range, the pump body is started to drive the second cold carrier liquid in the second circulation system to perform refrigeration on the first storage chamber, and the first temperature range is determined according to the phase transition temperature Th of the first cold carrier liquid and the temperature Tr of the first storage chamber.

[0058] It can be understood that, after the temperature Tz of the first cold carrier liquid in the liquid tank of the second circulation system is obtained by the temperature acquisition component, the size relationship between the temperature Tz of the first cold carrier liquid in the liquid tank and the phase transition temperature Th of the first cold carrier liquid can be determined. The phase transition temperature refers to the critical temperature when a substance changes between different phases, for example, the phase transition temperature of water changing into ice is 0°C. Therefore, in order to ensure the working efficiency of the second circulation system and avoid the form change of the first cold carrier liquid causing the second circulation system to fail to operate normally, by comparing the current temperature Tz of the first cold carrier liquid with the phase transition temperature Th of the first cold carrier liquid, when the temperature Tz of the first cold carrier liquid is higher than the phase transition temperature Th of the first cold carrier liquid, that is, when the first cold carrier liquid remains in a liquid state, the pump body is started to drive the second cold carrier liquid to circulate between the liquid tank and the first storage chamber evaporator, so as to ensure that the second circulation system performs stable and rapid refrigeration on the first storage chamber. By real-time acquisition of the temperature Tz of the first cold carrier liquid in the liquid tank and determination of the phase transition temperature Th of the first cold carrier liquid, the second circulation system can effectively and stably perform refrigeration on the first storage chamber, thereby improving the relevance of the temperature Tz of the first cold carrier liquid in the liquid tank to the working state of the pump body.

[0059] In this embodiment, 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 transition temperature of the first cold carrier liquid and a preset second threshold At2, and the second reference temperature is determined according to the temperature of the first storage chamber and a preset third threshold At3.

[0060] In practical applications, the first reference temperature is the sum of the phase change temperature Th of the first coolant liquid and a second threshold Δt2, and the second reference temperature is the sum of the first storage chamber temperature Tr and a 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 drives the second coolant liquid only when the temperature Tz of the first coolant liquid satisfies the following formula:

[0062] Th+Δt2≤Tz≤Tr+Δt3

[0063] Specifically, the second threshold and the third threshold are 1℃ and -1℃ respectively, that is, Δt2=1℃ and Δt3=-1℃, and the specific value range of the temperature Tz of the first coolant liquid is:

[0064] Th+1℃≤Tz≤Tr-1℃

[0065] Please refer to Figure 5 , Figure 5 A specific implementation process diagram of the above step S2000 is shown. As Figure 5 shown, the step S2000 at least includes the following steps:

[0066] Step S2100: When the temperature Tz of the first coolant liquid is in the first temperature range, set the start-stop temperature of the compressor to the start-stop temperature of the second circulation system.

[0067] It can be understood that the existing refrigeration equipment determines whether to start the compressor to refrigerate the first storage chamber and the second storage chamber according to whether the first storage chamber temperature and the second storage chamber temperature reach the preset start-stop temperature. Specifically, when the first storage chamber temperature is higher than the start temperature, the first storage chamber requests refrigeration, and when the first storage chamber temperature is lower than the stop temperature, the first storage chamber stops requesting refrigeration; when the second storage chamber temperature is higher than the start temperature, the second storage chamber requests refrigeration, and when the second storage chamber temperature is lower than the stop temperature, the second storage chamber stops requesting refrigeration. Therefore, the start-stop temperature of the existing refrigeration equipment has the problem of large variation range, which can 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 liquid in the liquid storage tank in real time, so that the temperature Tz of the first coolant liquid in the liquid storage tank is in different ranges, and the start-stop temperature of the compressor selects the start-stop temperature of different circulation systems, to avoid frequent start-stop of the compressor, effectively reduce energy consumption, reduce temperature fluctuation of the first storage chamber of the refrigeration equipment, and improve the stability of the refrigeration equipment.

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

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

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

[0072] Please refer to Figure 7 , Figure 7 The relationship between the first storage room temperature Tr and time is shown. Since the stop temperature Tyt of the second circulating system is greater than the stop temperature Tst of the first circulating system, and the start temperature Tsk of the first circulating system is greater than the start temperature Tyk of the second circulating system, that is, Tyt>Tst, Tsk>Tyk, it can be ensured that in the case that the temperature Tz of the first cold liquid in the liquid storage tank is in the first temperature range, the period of large fluctuation of the first storage room temperature Tr of the refrigeration device is significantly shortened, and especially in the case that the temperature Tz of the first cold liquid is in the first temperature range, the fluctuation range of the first storage room temperature Tr of the refrigeration device is significantly reduced, thereby improving the stability of the first storage room temperature of the refrigeration device.

[0073] Please refer to Figure 6 , Figure 6 A specific implementation process diagram of the above step S2000 is shown. As Figure 6As shown, step S2000 further includes at least the following steps:

[0074] Step S2300: When the temperature of the first cold carrier liquid exceeds a second temperature range, the electromagnetic valve 350 is closed to stop the first circulation system from refrigerating the first cold carrier liquid, and the second temperature range is determined according to the phase transition temperature Th of the first cold carrier liquid and the first storage chamber temperature Tr.

[0075] It can be understood that, since the second circulation system exchanges heat with the first circulation system through the liquid storage tank, the first circulation system is always refrigerating the liquid storage tank during the working time of the above steps, that is, the gaseous refrigerant is always exchanging heat with the liquid storage tank. To prevent the first cold carrier liquid in the liquid storage tank 410 from freezing due to excessively low temperature, the temperature Tz of the first cold carrier liquid is detected, and when Tz exceeds the second temperature range, the electromagnetic valve 350 is closed to stop the first circulation system from refrigerating the first cold carrier liquid in the liquid storage tank, thereby achieving the purpose of preventing freezing.

[0076] It can be understood that, the second temperature range is determined according to the phase transition temperature Th of the first cold carrier liquid and the first storage chamber temperature Tr, which can effectively ensure the working efficiency of the second circulation system and avoid the first cold carrier liquid from changing its form to cause the second circulation system to fail to operate normally. By comparing the current temperature Tz of the first cold carrier liquid with the phase transition temperature Th of the first cold carrier liquid, when the temperature Tz of the first cold carrier liquid is lower than the phase transition temperature Th of the first cold carrier liquid, that is, when the first cold carrier liquid cannot maintain a liquid state, the electromagnetic 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 cold carrier liquid in the liquid storage tank 410. By real-time acquisition of the temperature Tz of the first cold carrier liquid and determination of the phase transition temperature Th of the first cold carrier liquid, the first cold carrier liquid in the liquid storage tank 410 can be effectively maintained in a liquid state, and freezing of the first cold carrier liquid due to excessively low temperature can be avoided.

[0077] It can be understood that, when the temperature Tz of the first cold carrier liquid is greater than the first storage chamber temperature Tr, the first cold carrier liquid in the second circulation system stops circulating since the pump body 420 is in a closed state, and at this time, the first circulation system continues to refrigerate the first cold carrier liquid, which wastes the electric energy of the refrigeration equipment. Therefore, the electromagnetic valve 350 is closed to stop refrigerating the first cold carrier liquid in the liquid storage tank 410, so as to reduce the energy consumption of the compressor 310.

[0078] Step S2400: 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 transition temperature Th of the first cold carrier liquid and a preset fourth threshold value Δt4, and the fourth reference temperature is determined according to the first storage chamber temperature Tr and a preset fifth threshold value Δt5.

[0079] It can be understood that, in order to ensure the anti-freezing 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 step S2000, it is necessary to ensure that the second temperature range is greater than the first temperature range, and 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 cold carrier liquid and a preset fourth threshold value Δt4, and the fourth reference temperature is determined according to the first storage compartment temperature Tr and a preset fifth threshold value Δt5.

[0080] In step S2500, the third reference temperature is the sum of the phase change temperature of the first cold carrier liquid and the fourth threshold value, and the fourth reference temperature is the sum of the first storage compartment 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 cold carrier liquid and the fourth threshold value Δt4, and the fourth reference temperature is the sum of the first storage compartment 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 as follows:

[0082] Th+Δt4≤Tz≤Tr+Δt5

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

[0084] Tz<Th+Δt4, or Tz>Tr+Δt5

[0085] Specifically, the fourth threshold value Δt4 and the fifth threshold value Δt5 are 0 and -1℃ respectively, that is, Δt4=0 and Δt5=-1℃, and the specific value range of the temperature Tz of the first cold carrier liquid is:

[0086] Tz<Th, or Tz>Tr-1℃

[0087] Referring to Figure 2 and Figure 3 A one-way valve 440 is arranged between the pump body 420 and the first storage compartment 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 the one-way valve is a valve that fluid can only flow along the water inlet, and the medium cannot flow back along the water outlet. The one-way valve is also called check valve or non-return valve, which is used in hydraulic system to prevent oil from flowing in reverse direction, or used in pneumatic system to prevent compressed air from flowing in reverse direction. The one-way valve can be divided into passive and active types according to the working mode. The passive valve is moved by the external force of the medium to complete closing and conduction, and the flow direction of the medium is usually marked on the valve body. The active one-way valve has an electromagnet and a valve core spring, and the one-way valve needs to be controlled by electricity to be opened or closed.

[0089] It can be understood that, in the process that the pump body 420 drives the second cold carrier liquid to make the second circulation system refrigerate the first storage room, in order to ensure that the second cold carrier liquid can stably and quickly circulate between the liquid storage tank 410 and the first storage room evaporator 430 along the output direction of the pump body 420, a one-way valve 440 needs to be arranged between the pump body 420 and the first storage room evaporator 430, so as to avoid the backflow of the second cold carrier liquid and affect the refrigeration effect of the second circulation system. Meanwhile, in the case that the pump body 420 stops working, the one-way valve 440 can avoid the backflow of the second cold carrier liquid from the first storage room evaporator 430 to the pump body 420, so as to avoid that the working temperature of the pump body 420 fluctuates too much and affects the working stability of the pump body 420.

[0090] With reference to Figure 8 The second aspect embodiment of the present application further provides a refrigeration control device 500, which comprises at least one control processor 510 and a memory 520 connected with the at least one control processor 510 in communication; the memory 520 stores instructions executable by the at least one control processor 510, and the instructions are executed by the at least one control processor 510 to enable the at least one control processor 510 to perform the refrigeration control method as described above.

[0091] The refrigeration control device provided by the embodiment of the present application has at least the following beneficial effects: by acquiring the first storage room temperature, the set temperature and the temperature of the first cold carrier liquid of the refrigeration equipment, the first circulation system and the second circulation system are accurately controlled to run, so that the compressor and the pump body can be reasonably adjusted according to the first storage room temperature, the set temperature and the temperature of the first cold carrier liquid of the refrigeration equipment, the frequent start-stop of the compressor is avoided, the energy consumption is effectively reduced, the temperature fluctuation of the first storage room of the refrigeration equipment is reduced, and the stability of the refrigeration of the refrigeration equipment is improved.

[0092] In a third aspect, the embodiment of the present application 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 make the computer execute the control method of the first aspect embodiment.

[0093] According to the computer readable storage medium provided by the embodiment of the present application, at least the following beneficial effects are achieved: the first circulating system and the second circulating system are accurately controlled to operate by acquiring the first storage chamber temperature, the set temperature and the temperature of the first cold carrier liquid of the refrigeration equipment, so that the compressor and the pump body can be reasonably adjusted according to the first storage chamber temperature, the set temperature and the temperature of the first cold carrier liquid of the refrigeration equipment, the frequent start and stop of the compressor is avoided, the energy consumption is effectively reduced, the temperature fluctuation of the first storage chamber of the refrigeration equipment is reduced, and the stability of the refrigeration of the refrigeration equipment is improved.

[0094] Those of ordinary skill in the art will appreciate that all or some of the steps, processes, systems, etc. in the above-discussed methods can be implemented as software, firmware, hardware, or any suitable combination thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor, or a micro-processing unit, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on computer readable media, which can comprise computer storage media (or non-transitory media), and communication media (or transitory media). As is well known to those of ordinary skill in the art, computer storage media includes physical (or non-transitory) computer-storage media, with associated non-transitory computer- readable and / or computer-executable instructions. Computer storage media does not comprise carrier waves. That is, computer storage media does not comprise the transient signal itself, carrier waves, and other transitory media, which can contain only the instructions for execution by a computer. The term "computer-readable storage media" includes, but is not limited to, portable or fixed storage devices, optical storage devices, and various other mediums capable of storing computer-readable instructions and data structures. Examples of computer-readable storage media include, without limitation, random-access memories (RAM), read-only memories (ROM), electrically erasable programmable read only memories (EEPROMs), flash memories or other memory technology, CD-ROMs, digital versatile discs (DVDs), other optical storage, magnetic cassettes, magnetic tape, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store the desired information and that can be accessed by a computer.

[0095] In the description of the present specification, the description of the terms "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" and the like means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In the present specification, the exemplary description of the above terms does not necessarily mean the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0096] While embodiments of the application have been shown and described, it is to be understood that the embodiments described are merely divergences of the principles and application of the present application and that numerous modifications, changes, substitutions, and alterations can be made thereto without departing from the spirit and scope of the present application, which is defined by the following claims and their equivalents.

Claims

1. A refrigeration control method, characterized in that, The invention is applied to refrigeration equipment, which includes a first circulation system and a second circulation system. The second circulation system is used to refrigerate the first storage chamber of the refrigeration equipment. The second circulation system includes a liquid storage tank and a pump body. The second circulation system exchanges heat with the first circulation system through the liquid storage tank. The refrigeration control method includes: 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 coolant in the storage tank. When the temperature of the first coolant is within a first temperature range, the pump is activated 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. The lower limit of the first temperature range is a first reference temperature, and the upper limit of the first temperature range is a second reference temperature. The first reference temperature is determined based on the phase change temperature of the first coolant and a preset second threshold, and the second reference temperature is determined based on the temperature of the first storage chamber and a preset third threshold.

2. The method according to claim 1, characterized in that, The first circulation system further 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, which is disposed in the liquid storage tank.

3. The method according to claim 2, characterized in that, When the temperature of the first storage compartment is higher than the set temperature, the compressor of the refrigeration equipment is started to drive the refrigerant in the first circulation system, including: 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 first reference temperature is the sum of the phase change temperature of the first coolant and the second threshold, 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.

5. The method according to claim 1, characterized in that, After starting the pump to drive the second coolant in the second circulation system, the process further includes: When the temperature of the first refrigerant is within the first temperature range, the start-up and stop-up temperature of the compressor is set to the start-up and stop-up temperature of the second circulation system. When the temperature of the first coolant is greater than the second reference temperature, the start-up and stop-down temperatures of the compressor are set as the start-up and stop-down temperatures of the first circulation system; wherein, the stop-down temperature of the second circulation system is greater than the stop-down temperature of the first circulation system, and the start-up temperature of the first circulation system is greater than the start-up temperature of the second circulation system.

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

7. The method according to claim 6, characterized in that, The lower limit of the second temperature range is the third reference temperature, and the upper limit of the second temperature range is the fourth reference temperature; the third reference temperature is determined based on the phase change temperature of the first coolant and a preset fourth threshold, and the fourth reference temperature is determined based on the temperature of the first storage chamber and a preset fifth threshold.

8. The method according to claim 7, characterized in that, 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.

9. The method according to claim 1, characterized in that, The second circulation system further includes a one-way valve and a first storage chamber evaporator for cooling the first storage chamber of the refrigeration equipment. The one-way valve is disposed 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.

10. A refrigeration control device, characterized in that, It includes at least one control processor and a memory for communicatively connecting to the at least one control processor; the memory stores instructions executable by the at least one control processor to enable the at least one control processor to perform the control method as described in any one of claims 1 to 9.

11. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer-executable instructions for causing a computer to perform the control method as described in any one of claims 1 to 9.

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