Control method and equipment of refrigeration equipment, storage medium and computer program product

Abstract

The invention discloses a control method and device of refrigeration equipment, a storage medium and a computer program product, the refrigeration equipment comprises a compressor, a condensation module, a pressure module, a throttling module, a control module and an evaporation module, and the throttling module comprises a throttling component and a heating component; the method comprises the steps that the pressure module senses the pressure of the high-pressure pipe side and / or the low-pressure pipe side of the compressor; the control module supplies power to the heating component when judging that the pressure of the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds a set range; and the heating component is used for heating the throttling component.

Description

Technical Field

[0001] The present application relates to the technical field of refrigeration systems, and particularly to a control method, device, storage medium and computer program product for a refrigeration device. Background Art

[0002] In a refrigeration system, the compressor lubricating oil and water are prone to solidification at low temperatures. The solidified lubricating oil and ice are extremely likely to block at the capillary tube, preventing the refrigerant from flowing through the capillary tube, and the refrigeration system cannot refrigerate normally. Moreover, if the capillary tube is blocked for a long time during the operation of the compressor, it will impact the exhaust valve plate of the compressor and even cause the valve plate to break, resulting in a failure of the entire refrigeration system. Summary of the Invention

[0003] To solve the related technical problems, embodiments of the present application provide a control method, device, storage medium and computer program product for a refrigeration device.

[0004] The technical solution of the embodiments of the present application is implemented as follows: Embodiments of the present application provide a control method for a refrigeration device. The refrigeration device includes a compressor, a condensation module, a pressure module, a throttling module, a control module and an evaporation module. The throttling module includes a throttling component and a heating component. The method includes: The pressure module senses the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor; When the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, it supplies power to the heating component; The heating component heats the throttling component.

[0005] In the above solution, the pressure module includes a high-pressure pressure switch disposed on the high-pressure pipe side of the compressor and / or a low-pressure pressure switch disposed on the low-pressure pipe side of the compressor. The method further includes: When the control module detects that the high-pressure pressure switch sends a disconnection signal, it determines that the pressure on the high-pressure pipe side of the compressor exceeds the set range; and / or, when the control module detects that the low-pressure pressure switch sends a disconnection signal, it determines that the pressure on the low-pressure pipe side of the compressor exceeds the set range. Wherein, The first rated pressure of the high-pressure pressure switch represents the upper limit of the set range, and the second rated pressure of the low-pressure pressure switch represents the lower limit of the set range.

[0006] In the above solution, the pressure module includes a first pressure sensor disposed on the high-pressure pipe side of the compressor and / or a second pressure sensor disposed on the low-pressure pipe side of the compressor. The method further includes: When the control module detects that the first pressure detected by the first pressure sensor is greater than the upper limit of the set range, it determines that the pressure on the high-pressure pipe side of the compressor exceeds the set range; and / or, when the control module detects that the second pressure detected by the second pressure sensor is less than the lower limit of the set range, it determines that the pressure on the low-pressure pipe side of the compressor exceeds the set range.

[0007] In the above solution, when the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, the method further includes: The control module stops supplying power to the compressor.

[0008] In the above solution, when the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, supplying power to the heating component includes: When the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, it stops supplying power to the compressor, and after stopping supplying power to the compressor, it supplies power to the heating component.

[0009] In the above solution, the method further includes: When the power supply duration of the heating component is greater than or equal to the set duration, and / or when the temperature of the throttling component is greater than or equal to the set temperature threshold, the control module stops supplying power to the heating component.

[0010] In the above solution, the method further includes: When the number of times the control module determines that the set conditions are met reaches the set number of times, it stops supplying power to the compressor and issues a fault alarm; where The set conditions indicate that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor still exceeds the set range after stopping supplying power to the heating component.

[0011] An embodiment of the present application further provides a refrigeration device, including a compressor, a condensation module, a pressure module, a throttling module, a control module, and an evaporation module. Among them, the pressure module is used to sense the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor, and the throttling module includes a throttling component and a heating component; the control module is used to supply power to the heating component when it determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range; the heating component is used to heat the throttling component.

[0012] An embodiment of the present application further provides a storage medium, on which a computer program is stored, and when the computer program is executed by a processor, it implements the steps of any of the above methods.

[0013] The embodiment of the present application also provides a computer program product, including a computer program, which implements the steps of any of the above methods when executed by a processor.

[0014] In the control method, device, storage medium and computer program product of the refrigeration device provided by the embodiment of the present application, the refrigeration device includes a compressor, a condensation module, a pressure module, a throttling module, a control module and an evaporation module, and the throttling module includes a throttling component and a heating component; the pressure module senses the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor; when the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, it supplies power to the heating component; the heating component heats the throttling component. In the above solution, a pressure module is newly added to the refrigeration device, so that it can be determined that the refrigeration device is abnormal when the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor sensed by the pressure module exceeds the set range. By supplying power to the heating component, the heating component heats the throttling component, and the ice blockage and / or oil blockage of the throttling component are automatically resolved in time, so that the entire refrigeration device can quickly return to the normal operating state. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of a refrigeration device according to an embodiment of the present application; Figure 2 It is a schematic flowchart of a control method for a refrigeration device according to an embodiment of the present application; Figure 3 It is a schematic diagram of the change curves of various parameters of the refrigeration device during the refrigeration process according to an embodiment of the present application. Detailed Embodiments

[0016] At present, a refrigeration system using a compression refrigeration method at least includes a compressor, a condenser, a throttling component and an evaporator; the refrigeration principle of a refrigeration system using a compression refrigeration method is as follows: the compressor inhales low-temperature and low-pressure refrigerant gas and compresses the low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas; the high-temperature and high-pressure refrigerant gas enters the condenser and condenses into high-temperature and high-pressure liquid under the action of cooling water or air; the high-temperature and high-pressure refrigerant liquid is throttled by a capillary tube and is converted into a low-pressure and low-temperature gas-liquid mixture; the refrigerant liquid absorbs heat and vaporizes in the evaporator to generate low-temperature and low-pressure steam; the compressor inhales the low-temperature and low-pressure refrigerant gas and conducts a new refrigeration cycle.

[0017] A refrigeration system using a compression refrigeration method includes a low-temperature refrigerator. In the low-temperature refrigerator, whether it is a cascade or self-cascade system, and whether it includes an oil separator or not, controlling the oil and moisture from entering the refrigeration system has always been a core process of the low-temperature refrigerator. Most compressor lubricating oils on the market will solidify below -75 degrees Celsius (°C), and moisture is even more likely to solidify into ice at low temperatures. The temperature at the capillary of a low-temperature refrigerator that can maintain a temperature below -86 °C can reach -90 °C. Therefore, the oil and moisture in the refrigeration system are extremely likely to solidify at the capillary, causing the capillary to become blocked, preventing the refrigerant from flowing through the capillary, and the refrigerator from refrigerating. At the same time, it is also easy to cause the high pressure in the refrigeration system to rise and the low pressure to drop. If the compressor operates for a long time with the capillary blocked, it will impact the exhaust valve plate and even cause the exhaust valve plate to break, resulting in a failure of the entire refrigeration system.

[0018] Based on this, in various embodiments of the present application, a refrigeration device includes a compressor, a condensation module, a pressure module, a throttling module, a control module, and an evaporation module. The throttling module includes a throttling component and a heating component; the pressure module senses the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor; when the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, it supplies power to the heating component; the heating component heats the throttling component. In the above solution, a pressure module is newly added to the refrigeration device, so that it can be determined that the refrigeration device is abnormal by sensing that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range. By supplying power to the heating component, the heating component heats the throttling component, automatically eliminating the ice blockage and / or oil blockage of the throttling component in a timely manner, so that the entire refrigeration device can quickly return to the normal operating state.

[0019] The following further describes the present application in detail with reference to the accompanying drawings and embodiments.

[0020] First, the structure of the refrigeration device will be described. The refrigeration device includes a compressor, a condensation module, a pressure module, a throttling module, a control module, and an evaporation module. Among them, the compressor is used to increase the pressure and temperature of the refrigerant, drive the refrigerant to circulate in the refrigeration device, and realize the transfer of heat from a low-temperature environment to a high-temperature environment. The condensation module may include a condenser, which is used to remove the heat of the high-temperature and high-pressure gaseous refrigerant discharged from the compressor through a cooling medium and convert it into a liquid refrigerant. The pressure module may include a pressure switch and / or a pressure sensor, which is used to sense the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor to realize the abnormal detection in the refrigeration device. The throttling module includes a throttling component and a heating component. The throttling component may include a capillary tube, a throttle valve, and / or an expansion valve, which is used to throttle, depressurize, and cool the refrigerant. The heating component is used to heat the throttling component. The evaporation module includes an evaporator, which is used to exchange heat between the low-temperature and low-pressure liquid refrigerant and the outside air or water, and reduce the surrounding environment temperature through the evaporation and heat absorption process of the liquid refrigerant. The control module is used to control the operation of the refrigeration device, including controlling the operation of each module in the refrigeration device.

[0021] For example, Figure 1 The schematic structural diagram of the refrigeration device is shown. Among them, the refrigeration device may further include a heat exchanger, which can be used to recover part of the heat of the refrigerant liquid flowing out of the condenser, and can also be used to preheat the refrigerant about to enter the evaporator, so as to reduce the heat that the evaporator needs to absorb, improve the refrigeration efficiency of the refrigeration device, and reduce the circulation time of the refrigerant in the refrigeration device. In the case where the throttling component is a capillary tube, the heating component may be a capillary heating wire. The pressure switch P1 represents the high-pressure pressure switch, which can be set between the condenser outlet on the high-pressure pipe side of the compressor and the heat exchanger to sense the pressure on the high-pressure pipe side of the compressor. The pressure switch P2 represents the low-pressure pressure switch, which can be set between the heat exchanger on the low-pressure pipe side of the compressor and the compressor inlet to sense the pressure on the low-pressure pipe side of the compressor.

[0022] Based on the above refrigeration device, an embodiment of the present application further provides a control method for the refrigeration device, as Figure 2 shown, the control method of the refrigeration device includes: Step 201: The pressure module senses the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor.

[0023] Step 202: When the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, power is supplied to the heating component.

[0024] Step 203: The heating component heats the throttling component.

[0025] Here, since a blockage in the throttling component can cause the high pressure of the refrigeration equipment to rise and the low pressure to drop, it is possible to determine whether there may be a blockage in the throttling component by the high and low pressures of the refrigeration equipment, thereby dealing with the abnormal situation of blockage in the throttling component. Based on this, the pressure module senses the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor, and when the control module determines that the pressure sensed by the pressure module on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, it supplies power to the heating component, that is, starts the heating component, so that the heating component can heat the throttling component to eliminate ice blockage and / or oil blockage in the throttling component, enabling the refrigeration equipment to refrigerate normally.

[0026] It should be noted that the heating component can be tightly wrapped around the throttling component, and the low-temperature resistance range of the material of the heating component includes the lowest temperature that the throttling component may reach. The pressure module can be deployed on either the low-pressure pipe side or the high-pressure pipe side of the compressor, or can be respectively deployed on both the low-pressure pipe side and the high-pressure pipe side of the compressor.

[0027] It should be noted that the set range can be determined according to the parameters of the refrigeration equipment measured before leaving the factory, or set by technicians before leaving the factory. The parameters of the refrigeration equipment can include the highest pressure on the high-pressure pipe side of the compressor and the lowest pressure on the low-pressure pipe side of the compressor under normal working conditions of the refrigeration equipment, as well as the pressure values on the high-pressure pipe side and the low-pressure pipe side of the compressor when the throttling component of the refrigeration equipment is in a blocked state; as Figure 3 shown in the schematic diagram of the change curves of the parameters of the refrigeration equipment during the refrigeration process measured before leaving the factory, including the change curve of the temperature inside the box, the change curve of the pressure value on the high-pressure pipe side of the compressor, and the change curve of the pressure value on the low-pressure pipe side of the compressor; the upper limit of the set range can be based on the highest pressure on the high-pressure pipe side of the compressor under normal working conditions of the refrigeration equipment (such as Figure 3 the pressure value of P3 in), and the pressure value on the high-pressure pipe side of the compressor when the throttling component of the refrigeration equipment is in a blocked state (such as Figure 3 the pressure value of P4 in) to determine. Exemplarily, the upper limit of the set range can be a value within the range from P3 to P4 in Figure 3 , which can be expressed as P3 < ph < P4, where ph represents the upper limit of the set range; the lower limit of the set range can be based on the lowest pressure on the low-pressure pipe side of the compressor under normal working conditions of the refrigeration equipment (such as Figure 3 the pressure value of P5 in), and the pressure value on the low-pressure pipe side of the compressor when the throttling component of the refrigeration equipment is in a blocked state (such as Figure 3 the pressure value of P6 in) to determine. Exemplarily, the lower limit of the set range can be in Figure 3A value within the range from P6 to P5 can be expressed as P6 < pl < P5, where pl represents the lower limit of the set range. The normal operating states of the refrigeration device include a stable operating state, an operating state at a high ambient temperature, an operating state at a low ambient temperature, a temperature pulling state, a state of unfavorable heat dissipation, etc.

[0028] In order to increase the structural flexibility of the refrigeration device, in one embodiment, the pressure module includes a high-pressure pressure switch disposed on the high-pressure pipe side of the compressor and / or a low-pressure pressure switch disposed on the low-pressure pipe side of the compressor, and the method further includes: When the control module detects that the high-pressure pressure switch sends a disconnection signal, it determines that the pressure on the high-pressure pipe side of the compressor exceeds the set range; and / or, when the control module detects that the low-pressure pressure switch sends a disconnection signal, it determines that the pressure on the low-pressure pipe side of the compressor exceeds the set range; where The first rated pressure of the high-pressure pressure switch represents the upper limit of the set range, and the second rated pressure of the low-pressure pressure switch represents the lower limit of the set range.

[0029] Here, the pressure module can be a pressure switch, and the pressure switch can include a high-pressure pressure switch and / or a low-pressure pressure switch. The high-pressure pressure switch can be welded on the high-pressure pipe side of the compressor. The high-pressure pipe side of the compressor includes the pipeline from the compressor outlet to the inlet of the throttling component. When the high-pressure pressure switch detects that the pressure exceeds (is greater than or equal to) the first rated pressure of the high-pressure pressure switch, it sends a disconnection signal; the low-pressure pressure switch can be welded on the low-pressure pipe side of the compressor. The low-pressure pipe side of the compressor includes the pipeline from the outlet of the throttling component to the compressor inlet. In practical applications, the low-pressure pipe side of the compressor is usually the pipeline from the evaporator outlet to the compressor inlet. When the low-pressure pressure switch detects that the pressure is lower than (is less than or equal to) the second rated pressure of the low-pressure pressure switch, it sends a disconnection signal. Based on this, the control module can determine that the pressure on the corresponding pipe side of the compressor exceeds the set range by detecting the disconnection signal sent by the high-pressure pressure switch and / or the low-pressure pressure switch. For example, when receiving the disconnection signal sent by the high-pressure pressure switch and / or the low-pressure pressure switch. The first rated pressure of the high-pressure pressure switch can also be understood as the rated parameter or rated pressure of the high-pressure pressure switch; the second rated pressure of the low-pressure pressure switch can also be understood as the rated parameter or rated pressure of the low-pressure pressure switch.

[0030] When the control module detects that the high-pressure pressure switch sends a disconnection signal, it determines that the pressure sensed by the pressure module exceeds the set range. Specifically, it determines that the pressure on the high-pressure pipe side of the compressor exceeds the first rated pressure; when detecting that the low-pressure pressure switch sends a disconnection signal, it determines that the pressure sensed by the pressure module exceeds the set range. Specifically, it determines that the pressure on the low-pressure pipe side of the compressor is lower than the second rated pressure.

[0031] To increase the structural flexibility of the refrigeration equipment, the pressure module includes a first pressure sensor disposed on the high-pressure pipe side of the compressor and / or a second pressure sensor disposed on the low-pressure pipe side of the compressor, and the method further includes: When the control module detects that the first pressure detected by the first pressure sensor is greater than the upper limit of the set range, it determines that the pressure on the high-pressure pipe side of the compressor exceeds the set range; and / or, when the control module detects that the second pressure detected by the second pressure sensor is less than the lower limit of the set range, it determines that the pressure on the low-pressure pipe side of the compressor exceeds the set range.

[0032] Here, when the pressure module is a pressure sensor, the pressure module can directly obtain the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor detected by the pressure sensor, so as to determine whether the pressure on the corresponding pipe side of the compressor exceeds the set range and whether it is necessary to eliminate the ice blockage and / or oil blockage of the throttling component. Specifically, when the control module detects that the first pressure detected by the first pressure sensor is greater than the upper limit of the set range, and / or when it detects that the second pressure detected by the second pressure sensor is less than the lower limit of the set range, it determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range and it is necessary to eliminate the ice blockage and / or oil blockage of the throttling component. The first pressure represents the pressure on the high-pressure pipe side of the compressor, and the second pressure represents the pressure on the low-pressure pipe side of the compressor. The first pressure being greater than the upper limit of the set range indicates that the pressure on the high-pressure pipe side of the compressor exceeds the upper limit of the set range, and the second pressure being less than the lower limit of the set range indicates that the pressure on the low-pressure pipe side of the compressor is lower than the lower limit of the set range.

[0033] To prevent the compressor from operating for a long time in a state where the throttling component is blocked and irreversible mechanical failures occur, in one embodiment, when the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, the method further includes: The control module stops supplying power to the compressor.

[0034] Here, when the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, it can stop supplying power to the compressor while supplying power to the heating component, that is, the compressor is powered off; or supply power to the heating component first and then stop supplying power to the compressor; or stop supplying power to the compressor first and then supply power to the heating component. Here, the execution order of supplying power to the heating component and powering off the compressor is not specifically limited. Since the compressor has a shutdown state during normal operation and a process of starting and running from the shutdown state, the blockage of the throttling component will cause the pressure on the high-pressure pipe side of the compressor to increase and the pressure on the low-pressure pipe side to decrease. Starting and running the compressor from the shutdown state under such abnormal pressure changes is likely to cause the pipeline to burst, resulting in irreversible mechanical failures. Therefore, powering off the compressor when the heating component is heating, or powering off the compressor before the heating component is heated, or powering off the compressor after the heating component is heated can prevent the compressor from starting under pressure under abnormal pressure changes and protect the compressor from pressure shocks.

[0035] In order to prevent damage to the mechanical part of the compressor caused by pressure shocks, in one embodiment, when the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, supplying power to the heating component includes: When the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, it stops supplying power to the compressor and, after stopping supplying power to the compressor, supplies power to the heating component.

[0036] Here, when the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, it first stops supplying power to the compressor, that is, the compressor is powered off. After stopping supplying power to the compressor, it starts to supply power to the heating component, avoiding the compressor starting under pressure and avoiding the compressor and the heating component being in the running state at the same time, further increasing the safety of the refrigeration equipment and reducing the equipment energy consumption. In addition, since it takes a certain amount of time for the heating component to heat the throttling component until the ice blockage and / or oil blockage are resolved after the heating component runs, in this embodiment, stopping supplying power to the compressor first and then starting to supply power to the heating component can also prevent the compressor from having operating failures during the period when the ice blockage and / or oil blockage of the throttling component are not resolved.

[0037] In order to eliminate the ice blockage and / or oil blockage of the throttling component in a timely manner while not affecting the refrigeration effect of the refrigeration equipment, in one embodiment, the method further includes: When the power supply duration of the heating component is greater than or equal to the set duration and / or when the temperature of the throttling component is greater than or equal to the set temperature threshold, the control module stops supplying power to the heating component.

[0038] Here, after the control module starts to supply power to the heating component, when the power supply duration of the heating component is greater than or equal to the set duration, and / or when the temperature of the throttling component is greater than or equal to the set temperature threshold, it indicates that the current heating situation or the temperature of the throttling component can resolve the ice blockage and / or oil blockage of the throttling component, or can resolve a certain degree of ice blockage and / or oil blockage of the throttling component. In order to enable the refrigeration device to quickly resume its normal working state without affecting the refrigeration effect of the refrigeration device, the power supply to the heating component can be stopped or the operation of the heating component can be controlled to stop. When the power supply duration of the heating component is greater than or equal to the set duration, the temperature of the throttling component can rise to (greater than or equal to) the set temperature threshold. When the control module stops supplying power to the compressor after determining that the pressure on the high-pressure pipe side and / or low-pressure pipe side of the compressor exceeds the set range, the control module can also restore power to the compressor while stopping the power supply to the heating component, or restore power to the compressor after stopping the power supply to the heating component, or restore power to the compressor before stopping the power supply to the heating component.

[0039] For example, when the control module determines that the pressure on the high-pressure pipe side and / or low-pressure pipe side of the compressor exceeds the set range, it supplies power to the heating component, and the heating component starts to heat the throttling component; when the power supply duration of the heating component is greater than or equal to the set duration, and / or when the temperature of the throttling component is greater than or equal to the set temperature threshold, the power supply to the heating component is stopped or the operation of the heating component is controlled to stop. Or, when the control module determines that the pressure on the high-pressure pipe side and / or low-pressure pipe side of the compressor exceeds the set range, it stops supplying power to the compressor, and after stopping the power supply to the compressor, it supplies power to the heating component; when the power supply duration of the heating component is greater than or equal to the set duration, and / or when the temperature of the throttling component is greater than or equal to the set temperature threshold, the power supply to the heating component is stopped or the operation of the heating component is controlled to stop, and after stopping the power supply to the heating component or controlling the heating component to stop operating, power is restored to the compressor.

[0040] It should be noted that the set temperature threshold can be determined according to actual application requirements; the set duration can be determined according to the heating power of the heating component, and the heating power of the heating component can be determined according to actual requirements; when the set temperature threshold is constant, the set duration is inversely proportional to the heating power of the heating component.

[0041] It should be noted that when the refrigeration equipment is in normal operation, the heating component can also be powered regularly to heat the throttling component, thereby preventing ice blockage and / or oil blockage of the throttling component. Specifically, when the refrigeration equipment is in normal operation and the compressor is in the shutdown state, the heating component can be powered to heat the throttling component. When the power supply duration of the heating component is greater than or equal to the set duration, and / or when the temperature of the throttling component is greater than or equal to the set temperature threshold, the power supply to the heating component is stopped, so that the throttling component can be heated in the shutdown state of the compressor, achieving the prevention of oil blockage and ice blockage of the throttling component without affecting the normal refrigeration of the refrigeration equipment.

[0042] To ensure the integrity of the fault handling measures of the refrigeration equipment, in one embodiment, the method further includes: When the number of times that the control module determines that the set conditions are met reaches the set number of times, the power supply to the compressor is stopped and a fault alarm is issued; where the set conditions indicate that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor still exceeds the set range after the power supply to the heating component is stopped.

[0043] Here, when the number of times that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor still exceeds the set range after the power supply to the heating component is stopped reaches the set number of times, it indicates that the current fault of the refrigeration equipment cannot be solved by eliminating the ice blockage and oil blockage of the throttling component, that is, it may be other fault problems that cause the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor to exceed the set range. For example, if the throttling component is dirty blocked, the power supply to the compressor can be stopped first, that is, the compressor is powered off, and a fault alarm is issued to remind the user to contact the relevant staff to handle the fault, or use other methods to handle the fault problem.

[0044] It should be noted that when the pressure module is a pressure switch, the set condition that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor still exceeds the set range after the power supply to the heating component is stopped is specifically characterized as: after the power supply to the heating component is stopped, the disconnection signal sent by the high-pressure pressure switch and / or the low-pressure pressure switch is still detected, or, after the power supply to the heating component is stopped and the compressor is powered on again, the disconnection signal sent by the high-pressure pressure switch and / or the low-pressure pressure switch is still detected; when the pressure module is a pressure sensor, the set condition that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor still exceeds the set range after the power supply to the heating component is stopped is specifically characterized as: the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor detected by the pressure sensor still exceeds the set range after the operation of the heating component is stopped, or, after the power supply to the heating component is stopped and the compressor is powered on again, the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor detected by the pressure sensor still exceeds the set range.

[0045] The present application will be further described in detail below in combination with application examples.

[0046] Based on Figure 1 the refrigeration equipment shown, the control method of the refrigeration equipment includes the following steps: Step 1: The pressure module senses the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor.

[0047] Here, the pressure module may include a high-pressure pressure switch configured on the high-pressure pipe side of the compressor and / or a low-pressure pressure switch configured on the low-pressure pipe side of the compressor. The high-pressure pressure switch senses the pressure on the high-pressure pipe side of the compressor, and the low-pressure pressure switch senses the pressure on the low-pressure pipe side of the compressor; when the high-pressure pressure switch senses that the pressure on the high-pressure pipe side of the compressor exceeds the first rated pressure, it issues a disconnection signal, and / or when the low-pressure pressure switch senses that the pressure on the low-pressure pipe side of the compressor is lower than the second rated pressure, it issues a disconnection signal.

[0048] Alternatively, the pressure module may include a first pressure sensor configured on the high-pressure pipe side of the compressor and / or a second pressure sensor configured on the low-pressure pipe side of the compressor. The first pressure sensor senses the pressure on the high-pressure pipe side, and the second pressure sensor senses the pressure on the low-pressure pipe side.

[0049] Step 2: When the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, it supplies power to the heating component.

[0050] Here, when the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, it may supply power to the heating component to start the heating component to heat the throttling component, and may also stop supplying power to the compressor to protect the compressor from pressure shock; specifically, when the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, it may stop supplying power to the compressor and, after stopping supplying power to the compressor, supply power to the heating component.

[0051] Step 3: The heating component heats the throttling component.

[0052] Here, after the control module supplies power to the heating component, the heating component starts to operate to heat the throttling component to dissolve the ice blockage and / or oil blockage in the throttling component.

[0053] Step 4: When the power supply duration of the heating component is greater than or equal to the set duration, and / or when the temperature of the throttling component is greater than or equal to the set temperature threshold, the control module stops supplying power to the heating component.

[0054] Here, when the power supply duration of the heating component is greater than or equal to the set duration, and / or when the temperature of the throttling component is greater than or equal to the set temperature threshold, the control module can stop supplying power to the heating component to prevent the temperature of the throttling component from being too high, and can also resume power supply to the compressor to prevent the compressor from being powered off for too long, affecting the normal operation of the refrigeration device.

[0055] When the power supply to the heating component is stopped and the control module can still detect the disconnection signal sent by the pressure switch, or when the pressure detected by the pressure sensor obtained by the control module still exceeds the set range, it indicates that the fault of the refrigeration device has not been eliminated. It may be that the blockage of the throttling component has not been eliminated. Repeat steps 2-4 to heat the throttling component again to eliminate the ice blockage and oil blockage of the throttling component; until the control module does not detect the disconnection signal sent by the pressure switch, or the control module obtains that the pressure detected by the pressure sensor is within the set range, indicating that the current fault has been eliminated, that is, the ice blockage and oil blockage of the throttling component have been eliminated, and the refrigeration device resumes normal operation; or until the number of executions of steps 2-4 reaches the set number, indicating that the current fault cannot be solved by eliminating the ice blockage and oil blockage of the throttling component. It may be that other faults cause the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor to exceed the set range, and execute step 5.

[0056] Step 5: When the control module determines that the number of times of meeting the set conditions reaches the set number, stop supplying power to the compressor and issue a fault alarm.

[0057] Here, the set condition indicates that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor still exceeds the set range after the power supply to the heating component is stopped. When the number of times of the set condition reaches the set number, it indicates that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range due to problems other than the ice blockage and oil blockage of the throttling component. The power supply to the compressor can be stopped and a fault alarm can be issued to remind the user to contact the relevant staff or try other processing methods.

[0058] The embodiment of the present application also provides a refrigeration device, including: a compressor, a condensation module, a pressure module, a throttling module, a control module, and an evaporation module. Among them, the pressure module is used to sense the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor, and the throttling module includes a throttling component and a heating component; the control module is used to supply power to the heating component when it is determined that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range; the heating component is used to heat the throttling component.

[0059] It should be noted that for the description of each module in the refrigeration device, please refer to Figure 1 the relevant description in the corresponding embodiment, which will not be elaborated here.

[0060] In one embodiment, the pressure module includes a high-pressure pressure switch disposed on the high-pressure pipe side of the compressor and / or a low-pressure pressure switch disposed on the low-pressure pipe side of the compressor. The control module is further configured to, when detecting that the high-pressure pressure switch sends a disconnection signal, determine that the pressure on the high-pressure pipe side of the compressor exceeds the set range; and / or, when detecting that the low-pressure pressure switch sends a disconnection signal, determine that the pressure on the low-pressure pipe side of the compressor exceeds the set range; wherein, The first rated pressure of the high-pressure pressure switch represents the upper limit of the set range, and the second rated pressure of the low-pressure pressure switch represents the lower limit of the set range.

[0061] In one embodiment, the pressure module includes a first pressure sensor disposed on the high-pressure pipe side of the compressor and / or a second pressure sensor disposed on the low-pressure pipe side of the compressor. The control module is further configured to, when detecting that the first pressure detected by the first pressure sensor is greater than the upper limit of the set range, determine that the pressure on the high-pressure pipe side of the compressor exceeds the set range; and / or, when detecting that the second pressure detected by the second pressure sensor is less than the lower limit of the set range, determine that the pressure on the low-pressure pipe side of the compressor exceeds the set range.

[0062] In one embodiment, the control module is specifically configured to stop supplying power to the compressor when determining that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range.

[0063] In one embodiment, the control module is specifically configured to stop supplying power to the compressor when determining that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, and after stopping supplying power to the compressor, supply power to the heating component.

[0064] In one embodiment, the control module is further configured to stop supplying power to the heating component when the power supply duration of the heating component is greater than or equal to a set duration and / or when the temperature of the throttling component is greater than or equal to a set temperature threshold.

[0065] In one embodiment, the control module is further configured to stop supplying power to the compressor and issue a fault alarm when the number of times of meeting the set conditions reaches the set number; wherein, The set condition indicates that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor still exceeds the set range after stopping supplying power to the heating component.

[0066] In practical applications, the refrigeration device may further include a storage device, which can be used to store various types of data to support the operation of the control module of the refrigeration device. Examples of such data include: any computer program for operating on the refrigeration device. The storage device can be a volatile memory or a non-volatile memory, or can include both a volatile memory and a non-volatile memory. Among them, the non-volatile memory can be a read-only memory (ROM, Read Only Memory), a programmable read-only memory (PROM, Programmable Read-Only Memory), an erasable programmable read-only memory (EPROM, Erasable Programmable Read-Only Memory), an electrically erasable programmable read-only memory (EEPROM, Electrically Erasable Programmable Read-Only Memory), a ferromagnetic random access memory (FRAM, ferromagnetic random access memory), a flash memory (Flash Memory), a magnetic surface memory, an optical disc, or a compact disc read-only; the magnetic surface memory can be a disk memory or a tape memory. The volatile memory can be a random access memory (RAM, Random Access Memory) used as an external cache. The memory described in the embodiments of the present application is intended to include but not limited to these and any other suitable types of memory.

[0067] In an exemplary embodiment, the refrigeration device can be implemented by one or more application-specific integrated circuits (ASICs, Application Specific Integrated Circuit), digital signal processors (DSPs, Digital Signal Processor), programmable logic devices (PLDs, Programmable Logic Device), complex programmable logic devices (CPLDs, Complex Programmable Logic Device), field-programmable gate arrays (FPGAs, Field-Programmable Gate Array), general-purpose processors, controllers, microcontrollers (MCUs, Micro Controller Unit), microprocessors (Microprocessor), or other electronic components, and is used to execute the foregoing method.

[0068] In an exemplary embodiment, the embodiment of the present application further provides a storage medium, specifically a computer-readable storage medium, such as a storage device including a refrigeration device. The above computer program can be executed by a control module of the refrigeration device to complete the steps described in the foregoing method. The computer-readable storage medium can be a FRAM, ROM, PROM, EPROM, EEPROM, Flash Memory, magnetic surface memory, optical disc, CD-ROM, or other memories.

[0069] Exemplarily, the embodiment of the present application further provides a computer program product, including a computer program, which can be executed by a control module of the refrigeration device to complete the steps described in any of the foregoing methods.

[0070] It should be noted that: "first", "second", etc. are used to distinguish similar objects and do not necessarily describe a specific order or sequence. The term "and / or" in this article only describes the association relationship of associated objects and indicates that three relationships can exist. For example, A and / or B can represent: A exists alone, A and B exist simultaneously, and B exists alone. In addition, the technical solutions described in the embodiments of the present application can be combined arbitrarily without conflict. The above is only a preferred embodiment of the present application and is not used to limit the protection scope of the present application.

Claims

1. A control method for a refrigeration device, characterized in that, The refrigeration device includes a compressor, a condensation module, a pressure module, a throttling module, a control module, and an evaporation module. The throttling module includes a throttling component and a heating component. The method includes: The pressure module senses the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor. When the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, it powers the heating component. The heating component heats the throttling component.

2. The method according to claim 1, wherein The pressure module includes a high-pressure pressure switch disposed on the high-pressure pipe side of the compressor and / or a low-pressure pressure switch disposed on the low-pressure pipe side of the compressor. The method further includes: When the control module detects that the high-pressure pressure switch sends a disconnection signal, it determines that the pressure on the high-pressure pipe side of the compressor exceeds the set range; and / or, when the control module detects that the low-pressure pressure switch sends a disconnection signal, it determines that the pressure on the low-pressure pipe side of the compressor exceeds the set range. Wherein, The first rated pressure of the high-pressure pressure switch represents the upper limit of the set range, and the second rated pressure of the low-pressure pressure switch represents the lower limit of the set range.

3. The method according to claim 1, characterized in that The pressure module includes a first pressure sensor disposed on the high-pressure pipe side of the compressor and / or a second pressure sensor disposed on the low-pressure pipe side of the compressor. The method further includes: When the control module detects that the first pressure detected by the first pressure sensor is greater than the upper limit of the set range, it determines that the pressure on the high-pressure pipe side of the compressor exceeds the set range; and / or, when the control module detects that the second pressure detected by the second pressure sensor is less than the lower limit of the set range, it determines that the pressure on the low-pressure pipe side of the compressor exceeds the set range.

4. The method according to claim 1, wherein When the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, the method further includes: The control module stops powering the compressor.

5. The method according to any one of claims 1 to 3, characterized in that When the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range and powers the heating component, it includes: When the control module determines that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range, it stops powering the compressor, and after stopping powering the compressor, it powers the heating component.

6. The method according to any one of claims 1 to 3, characterized in that, The method further includes: When the power supply duration of the heating component is greater than or equal to the set duration and / or when the temperature of the throttling component is greater than or equal to the set temperature threshold, the control module stops powering the heating component.

7. The method according to any one of claims 1 to 3, characterized in that, The method further includes: When the number of times the control module determines that the set conditions are met reaches the set number of times, it stops powering the compressor and issues a fault alarm. Wherein, The set conditions indicate that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor still exceeds the set range after stopping powering the heating component.

8. A refrigeration device, characterized in that, It includes a compressor, a condensation module, a pressure module, a throttling module, a control module and an evaporation module. Among them, the pressure module is used to sense the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor. The throttling module includes a throttling component and a heating component. The control module is used to supply power to the heating component when it is determined that the pressure on the high-pressure pipe side and / or the low-pressure pipe side of the compressor exceeds the set range. The heating component is used to heat the throttling component.

9. A storage medium, on which a computer program is stored, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

10. A computer program product, comprising a computer program, characterized in that, When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 7.

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