Control method of fluorine pump compression refrigeration system, fluorine pump compression refrigeration system

Abstract

The application relates to the technical field of refrigeration and air conditioning, in particular to a control method of a fluorine pump compression refrigeration system and the fluorine pump compression refrigeration system, which comprises a first refrigeration system and a second refrigeration system, the first system comprises a first compressor and a first fluorine pump, and the second system comprises a second compressor and a second fluorine pump; the control method comprises the following steps: according to the operation temperature range of the first compressor and the second compressor, the outdoor unit environment temperature, the mode switching temperature, the start-stop state of the second compressor, the actual operation frequency of the first compressor and the preset operation frequency, the operation mode of the system is controlled. The control method of the fluorine pump compression refrigeration system provided by the application obtains the outdoor unit environment temperature of the fluorine pump compression refrigeration system and the refrigerating capacity under a specific operation mode, optimizes the mode switching logic of the fluorine pump compression refrigeration system, that is, the mode switching of the fluorine pump compression refrigeration system is determined according to the outdoor unit environment temperature and the operation states of the current first compressor and second compressor.

Description

[Technical Field]

[0001] This application relates to the field of refrigeration and air conditioning technology, specifically to a control method for a refrigerant pump compression refrigeration system and the refrigerant pump compression refrigeration system. [Background Technology]

[0002] For scenarios such as data centers that require continuous cooling throughout the year, using natural cooling instead of partial or complete compression refrigeration can significantly reduce the energy consumption of the cooling system. As a commonly used natural cooling system, the refrigerant pump compression refrigeration system typically combines two identical refrigerant pump compression refrigeration systems. In this system, the evaporator on the leeward side constitutes the first system, and the one on the windward side constitutes the second system. Both systems have both refrigerant pump natural cooling and compressor cooling operating modes. Furthermore, the evaporators in both systems employ a stacked design to increase the adequacy of heat exchange, reduce temperature gradients, and ensure the uniformity of the air supply temperature in the refrigerant pump compression refrigeration system.

[0003] In the process of developing this application, the inventors discovered at least the following technical problems in the prior art:

[0004] A refrigerant pump compression refrigeration system can switch between refrigerant pump mode, compressor mode, and pre-cooling mode based on the outdoor temperature. Specifically, it selectively activates either the refrigerant pump or compressor in the first system, or the refrigerant pump or compressor in the second system, based on the relationship between the outdoor temperature, the outdoor temperature at which pre-cooling mode is activated, and the outdoor temperature at which the refrigerant pump is activated. However, this mode switching method may cause the compressor to continue operating in refrigerant pump mode even when the cooling capacity at the lower limit frequency is sufficient, especially in low-load scenarios, leading to further reductions and fluctuations in the supply air temperature. [Summary of the Invention]

[0005] In view of this, this application provides a control method for a refrigerant pump compression refrigeration system and a refrigerant pump compression refrigeration system, which determines the mode switching of the refrigerant pump compression refrigeration system based on the ambient temperature of the outdoor unit and the current operating status of the first compressor and the second compressor, so as to ensure the temperature control effect of the system.

[0006] In a first aspect, this application provides a control method for a refrigerant pump compression refrigeration system, the refrigerant pump compression refrigeration system comprising a first refrigeration system disposed on the leeward side and a second refrigeration system disposed on the windward side, the first refrigeration system comprising a first compressor and a first refrigerant pump, and the second refrigeration system comprising a second compressor and a second refrigerant pump; the control method for the refrigerant pump compression refrigeration system includes:

[0007] The operating temperature ranges of the first compressor and the second compressor, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system are obtained. Based on the operating temperature ranges of the first compressor and the second compressor, the required cooling capacity of the refrigerant pump compression refrigeration system, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system, the start-stop status and actual operating frequency of the first compressor and the second compressor are dynamically controlled.

[0008] The mode switching temperature of the refrigerant pump compression refrigeration system is set, and the preset operating frequency of the first compressor is set. The operating mode of the refrigerant pump compression refrigeration system is dynamically controlled according to the operating temperature range of the first compressor and the second compressor, the relationship between the outdoor ambient temperature and the mode switching temperature, the start and stop status of the second compressor, and the relationship between the actual operating frequency and the preset operating frequency of the first compressor.

[0009] When the ambient temperature of the outdoor unit of the fluorine pump compression refrigeration system is higher than the mode switching temperature, and the ambient temperature of the outdoor unit of the fluorine pump compression refrigeration system is within the operating temperature range of the first compressor and the second compressor, the first compressor and the second compressor are kept running normally, and the start-stop status and actual operating frequency of the first compressor and the second compressor are dynamically controlled according to the cooling capacity required by the load of the fluorine pump compression refrigeration system.

[0010] When the outdoor ambient temperature of the refrigerant pump compression refrigeration system is lower than the mode switching temperature, and the first compressor and the second compressor are operating normally, the second refrigeration system is controlled to switch from operation of the second compressor to operation of the second refrigerant pump.

[0011] When the outdoor ambient temperature of the refrigerant pump compression refrigeration system is lower than the mode switching temperature, and the first compressor is turned on and running while the second compressor is not turned on, if the actual operating frequency of the first compressor is greater than the preset operating frequency, the second refrigerant pump is controlled to turn on and run.

[0012] In some embodiments, the operating temperature ranges of the first compressor and the second compressor, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system are obtained. Based on the operating temperature ranges of the first compressor and the second compressor, the required cooling capacity of the refrigerant pump compression refrigeration system, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system, the start-stop status and actual operating frequency of the first compressor and the second compressor are dynamically controlled; including:

[0013] Determine whether the outdoor unit's ambient temperature is within the operating temperature range of the first compressor and the second compressor;

[0014] When the ambient temperature of the outdoor unit is within the operating temperature range of the first compressor and the second compressor, if the load required by the refrigerant pump compression refrigeration system is large, the first compressor and the second compressor will be turned on and run, and the first compressor and the second compressor will run at a high frequency.

[0015] When the ambient temperature of the outdoor unit is within the operating temperature range of the first compressor and the second compressor, if the required cooling capacity of the refrigerant pump compression refrigeration system is small, the first compressor is turned on and running, the second compressor is turned off, and the first compressor operates at a low frequency.

[0016] In some embodiments, setting the mode switching temperature of the refrigerant pump compression refrigeration system and setting the preset operating frequency of the first compressor includes:

[0017] Obtain the first cooling capacity provided by the first compressor at the lowest operating frequency, and obtain the second cooling capacity provided by the first refrigerant pump in pre-cooling mode;

[0018] The preset operating frequency of the first compressor is determined based on the first cooling capacity and the second cooling capacity, wherein the third cooling capacity provided by the first compressor at the preset operating frequency is greater than the sum of the first cooling capacity and the second cooling capacity.

[0019] In some embodiments, obtaining the second cooling capacity provided by the first refrigerant pump in pre-cooling mode includes:

[0020] With the first refrigeration system turned on and running, and the second refrigeration system turned off, the outdoor ambient temperature of the first refrigeration system is obtained, and the mode switching temperature of the first refrigeration system is set.

[0021] When the outdoor unit ambient temperature is lower than the mode switching temperature of the first refrigeration system, the first refrigeration system is controlled to switch from the operation of the first compressor to the operation of the first refrigerant pump. At this time, the first refrigeration system is in pre-cooling mode, and the second cooling capacity provided by the first refrigerant pump in pre-cooling mode can be obtained.

[0022] In some implementations, when the outdoor unit ambient temperature is lower than the mode switching temperature of the first refrigeration system, the first refrigeration system is controlled to switch from operation of the first compressor to operation of the first refrigerant pump; including:

[0023] The first compression circuit is closed, and the first refrigerant pump circuit is open; wherein, the first refrigeration system includes an evaporator, a first compressor, a first check valve, a condenser, a first refrigerant pump, a second check valve, and a throttling device; the evaporator, the first compressor, the condenser, the second check valve, and the throttling device constitute the first compression circuit, and the evaporator, the first check valve, the condenser, the first refrigerant pump, and the throttling device constitute the first refrigerant pump circuit.

[0024] Secondly, this application provides a control method for a fluorine pump compression refrigeration system, the fluorine pump compression refrigeration system including a third refrigeration system disposed on the leeward side and a fourth refrigeration system disposed on the windward side, the third refrigeration system including a third compressor, and the fourth refrigeration system including a third fluorine pump; the control method of the fluorine pump compression refrigeration system includes:

[0025] The operating temperature range of the third compressor and the ambient temperature of the outdoor unit of the fluorine pump compression refrigeration system are obtained. Based on the operating temperature range of the third compressor, the required cooling capacity of the fluorine pump compression refrigeration system, and the ambient temperature of the outdoor unit of the fluorine pump compression refrigeration system, the start-stop status and actual operating frequency of the third compressor are dynamically controlled.

[0026] The mode switching temperature of the refrigerant pump compression refrigeration system is set, and the preset operating frequency of the third compressor is set. The operating mode of the refrigerant pump compression refrigeration system is dynamically controlled according to the relationship between the operating temperature range of the third compressor, the outdoor ambient temperature and the mode switching temperature, and the relationship between the actual operating frequency of the third compressor and the preset operating frequency.

[0027] When the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system is higher than the mode switching temperature, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system is within the operating temperature range of the third compressor, the normal operation of the third compressor is maintained, and the start-stop status and actual operating frequency of the third compressor are dynamically controlled according to the cooling capacity required by the load of the refrigerant pump compression refrigeration system.

[0028] When the outdoor ambient temperature of the refrigerant pump compression refrigeration system is lower than the mode switching temperature, and the third compressor is operating normally, if the actual operating frequency of the third compressor is greater than the preset operating frequency, the third refrigerant pump is controlled to start and run.

[0029] In some embodiments, the operating temperature range of the third compressor and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system are obtained. Based on the operating temperature range of the third compressor, the required cooling capacity of the refrigerant pump compression refrigeration system, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system, the start-stop state and actual operating frequency of the third compressor are dynamically controlled; including:

[0030] Determine whether the outdoor unit's ambient temperature is within the operating temperature range of the third compressor;

[0031] When the ambient temperature of the outdoor unit is within the operating temperature range of the third compressor, if the load required by the refrigerant pump compression refrigeration system is large, the third compressor will operate at a high frequency.

[0032] When the ambient temperature of the outdoor unit is within the operating temperature range of the third compressor, if the required cooling capacity of the refrigerant pump compression refrigeration system is small, the third compressor will operate at a low frequency.

[0033] In some embodiments, setting the mode switching temperature of the refrigerant pump compression refrigeration system and setting the preset operating frequency of the third compressor includes:

[0034] Obtain the fourth cooling capacity provided by the third compressor at its lowest operating frequency;

[0035] The preset operating frequency of the third compressor is determined based on the fourth cooling capacity, wherein the fifth cooling capacity provided by the third compressor at the preset operating frequency is greater than the fourth cooling capacity.

[0036] In some embodiments, controlling the third fluorine pump to start and operate includes:

[0037] When the second compression circuit is open, the second refrigerant pump circuit is also open; wherein, the fourth refrigeration system includes an evaporator, a third refrigerant pump, a condenser, and a throttling device; the evaporator, the third refrigerant pump, the condenser, and the throttling device constitute the second refrigerant pump circuit.

[0038] Thirdly, this application provides a fluorine pump compression refrigeration system, wherein the fluorine pump compression refrigeration system adopts the control method of the fluorine pump compression refrigeration system described in any one of the first aspects or the control method of the fluorine pump compression refrigeration system described in any one of the second aspects.

[0039] By adopting the above technical solution, this application has at least the following beneficial effects:

[0040] The control method for the refrigerant pump compression refrigeration system provided in this application, when the compressor of the refrigerant pump compression refrigeration system is normally turned on and running, dynamically controls the refrigerant pump compression refrigeration system to operate in compressor mode or pre-cooling mode by acquiring the magnitude of the outdoor unit ambient temperature and mode switching temperature, the start / stop status of the second compressor, and the relationship between the actual operating frequency and the preset operating frequency of the first compressor. That is, the technical solution of this application determines the mode switching logic of the system based on the outdoor unit ambient temperature and the operating status of each component in the refrigerant pump compression refrigeration system, thereby reducing the temperature fluctuation of the space where the load is located caused by the mode switching of the system when the external temperature changes, and ensuring the temperature control effect of the system. [Attached Image Description]

[0041] Figure 1 A flowchart of a control method for a fluorine pump compression refrigeration system provided in this application;

[0042] Figure 2 This application provides a schematic diagram of the structure of a fluorine pump compression refrigeration system;

[0043] Figure 3 A flowchart of another control method for a fluorine pump compression refrigeration system provided in this application;

[0044] Figure 4 This is a schematic diagram of another fluorine pump compression refrigeration system provided in this application.

[0045] Attached image labels:

[0046] 1. First refrigeration system; 11. Evaporator; 12. First compressor; 121. First check valve; 13. Condenser; 14. First refrigerant pump; 141. Second check valve; 15. Throttling device; 2. Second refrigeration system; 21. Second compressor; 22. Second refrigerant pump;

[0047] 3. Third refrigeration system; 31. Third compressor; 4. Fourth refrigeration system; 41. Third refrigerant pump.

Detailed Implementation Methods

[0048] To better understand the technical solution of this application, the embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0049] It should be understood that the described embodiments are merely some, not all, of the embodiments in this application. All other embodiments obtained by those skilled in the art based on the embodiments in this application without inventive effort are within the scope of protection of this application.

[0050] The terminology used in the embodiments of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application. The singular forms “a,” “the,” and “the” used in the embodiments of this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise.

[0051] It should be understood that the term "and / or" used in this article is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this article generally indicates that the preceding and following related objects have an "or" relationship.

[0052] It should be noted that the directional terms such as "upper," "lower," "left," and "right" described in the embodiments of this application are used to describe the angles shown in the accompanying drawings and should not be construed as limiting the embodiments of this application. Furthermore, in the context, it should be understood that when it is mentioned that an element is connected "upper" or "lower" to another element, it can be directly connected to the other element "upper" or "lower," or indirectly connected to the other element "upper" or "lower" through an intermediate element.

[0053] For scenarios such as data centers that require continuous cooling throughout the year, using natural cooling instead of partial or complete compression refrigeration can significantly reduce the energy consumption of the cooling system. As a commonly used natural cooling system, the refrigerant pump compression refrigeration system typically combines two identical refrigerant pump compression refrigeration systems. In this system, the evaporator on the leeward side constitutes the first system, and the one on the windward side constitutes the second system. Both systems have both refrigerant pump natural cooling and compressor cooling operating modes. Furthermore, the evaporators in both systems employ a stacked design to increase the adequacy of heat exchange, reduce temperature gradients, and ensure the uniformity of the air supply temperature in the refrigerant pump compression refrigeration system.

[0054] In the process of developing this application, the inventors discovered at least the following technical problems in the prior art:

[0055] A refrigerant pump compression refrigeration system can switch between refrigerant pump mode, compressor mode, and pre-cooling mode based on the outdoor temperature. Specifically, it selectively activates either the refrigerant pump or compressor in the first system, or the refrigerant pump or compressor in the second system, based on the relationship between the outdoor temperature, the outdoor temperature at which pre-cooling mode is activated, and the outdoor temperature at which the refrigerant pump is activated. However, this mode switching method may cause the compressor to continue operating in refrigerant pump mode even when the cooling capacity at the lower limit frequency is sufficient, especially in low-load scenarios. This can further reduce the supply air temperature, causing fluctuations and affecting temperature control performance.

[0056] In view of this, this application provides a control method for a fluorine pump compression refrigeration system and a fluorine pump compression refrigeration system.

[0057] Example 1:

[0058] Example 1 provides a control method for a fluorine pump compression refrigeration system. Please refer to [link / reference]. Figure 1 and Figure 2 The refrigerant pump compression refrigeration system includes a first refrigeration system 1 located on the leeward side and a second refrigeration system 2 located on the windward side. The first refrigeration system 1 includes a first compressor 12 and a first refrigerant pump 14, and the second refrigeration system 2 includes a second compressor 21 and a second refrigerant pump 22. The control method of the refrigerant pump compression refrigeration system includes:

[0059] The operating temperature range of the first compressor 12 and the second compressor 21, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system are obtained. Based on the operating temperature range of the first compressor 12 and the second compressor 21, the required cooling capacity of the refrigerant pump compression refrigeration system, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system, the start-stop status and actual operating frequency of the first compressor 12 and the second compressor 21 are dynamically controlled.

[0060] The mode switching temperature of the refrigerant pump compression refrigeration system is set, and the preset operating frequency of the first compressor 12 is set. The operating mode of the refrigerant pump compression refrigeration system is dynamically controlled according to the operating temperature range of the first compressor 12 and the second compressor 21, the relationship between the outdoor ambient temperature and the mode switching temperature, the start and stop status of the second compressor 21, and the relationship between the actual operating frequency and the preset operating frequency of the first compressor 12.

[0061] When the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system is higher than the mode switching temperature, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system is within the operating temperature range of the first compressor 12 and the second compressor 21, the first compressor 12 and the second compressor 21 are kept running normally, and the start-stop status and actual operating frequency of the first compressor 12 and the second compressor 21 are dynamically controlled according to the cooling capacity required by the load of the refrigerant pump compression refrigeration system.

[0062] When the outdoor ambient temperature of the refrigerant pump compression refrigeration system is lower than the mode switching temperature, and the first compressor 12 and the second compressor 21 are operating normally, the second refrigeration system 2 is controlled to switch from the operation of the second compressor 21 to the operation of the second refrigerant pump 22.

[0063] If the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system is lower than the mode switching temperature, and the first compressor 12 is turned on and running while the second compressor 21 is not turned on, then if the actual operating frequency of the first compressor 12 is greater than the preset operating frequency, the second refrigerant pump 22 will be turned on and running.

[0064] In the above-mentioned solution, the control method of the refrigerant pump compression refrigeration system provided in this application, under the condition that the compressor of the refrigerant pump compression refrigeration system is normally turned on and running, dynamically controls the refrigerant pump compression refrigeration system to operate in compressor mode or pre-cooling mode by acquiring the relationship between the outdoor unit ambient temperature and the mode switching temperature, the start-stop status of the second compressor 21, and the relationship between the actual operating frequency and the preset operating frequency of the first compressor 12. That is, the technical solution of this application determines the mode switching logic of the system based on the outdoor unit ambient temperature and the operating status of each component in the refrigerant pump compression refrigeration system, thereby reducing the temperature fluctuation of the load space caused by the mode switching of the system when the external temperature changes, and ensuring the temperature control effect of the system.

[0065] In some implementations, the refrigerant pump compression refrigeration system includes a compressor mode and a pre-cooling mode. When the refrigerant pump compression refrigeration system is in compressor mode, the compressors of the first refrigeration system 1 and / or the second refrigeration system 2 are turned on and run. When the refrigerant pump compression refrigeration system is in pre-cooling mode, the compressors of the first refrigeration system 1 and / or the second refrigeration system 2 are switched to refrigerant pump operation to reduce the energy consumption of the system.

[0066] In some embodiments, the first refrigeration system 1 and the second refrigeration system 2 have the same structure. The first refrigeration system 1 includes an evaporator 11, a first compressor 12, a first check valve 121, a condenser 13, a first refrigerant pump 14, a second check valve 141, and a throttling device 15, all connected by pipes. The second refrigeration system 2 includes an evaporator 11, a second compressor 21, a first check valve 121, a condenser 13, a second refrigerant pump 22, a second check valve 141, and a throttling device 15, all connected by pipes. In the first refrigeration system 1 / second refrigeration system 2, the evaporator 11, the first compressor 12 / second compressor 21, the condenser 13, the second check valve 141, and the throttling device 15 constitute a first compression circuit, and the evaporator 11, the first check valve 121, the condenser 13, the first refrigerant pump 14 / second refrigerant pump 22, and the throttling device 15 constitute a first refrigerant pump circuit. Wherein:

[0067] Evaporator 11 is a heat exchanger for the heat exchange medium in the first compression circuit and the first fluorine pump circuit. The low-temperature and low-pressure heat exchange medium absorbs heat from the environment where the load is located and evaporates into a gaseous state in evaporator 11, thereby reducing the temperature of the environment where the load is located.

[0068] The first compressor 12 and the second compressor 21 can compress the high-temperature, low-pressure gaseous heat exchange medium from the evaporator 11 into a high-temperature, high-pressure heat exchange medium, providing power for the refrigeration cycle.

[0069] The first check valve 121 and the second check valve 141 (also known as check valves) ensure that the heat exchange medium can only flow in one direction in the circuit, preventing the heat exchange medium from flowing in the opposite direction.

[0070] The condenser 13 is another heat exchanger. Its function is to cool and condense the high-temperature and high-pressure heat exchange medium from the compressor into a liquid state. During the condensation process, the heat released by the heat exchange medium is transferred to the outside air or water by the outdoor unit.

[0071] The first fluorine pump 14 and the second fluorine pump 22 can provide a cooling capacity comparable to that of the first compressor 12 and the second compressor 21 in low-temperature environments, but consume far less power than the first compressor 12 and the second compressor 21, thereby achieving energy saving in the refrigeration process.

[0072] The throttling device 15, such as an expansion valve or capillary tube, is used to control the flow rate of the heat exchange medium from the condenser 13 to the evaporator 11, while reducing the pressure of the heat exchange medium from high pressure to low pressure, thus creating conditions for the evaporation of the heat exchange medium in the evaporator 11.

[0073] The first compressor 12 and the second compressor 21 are both connected in parallel with the first check valve 121, and the first refrigerant pump 14 and the second refrigerant pump 22 are both connected in parallel with the second check valve 141. Understandably, when the refrigerant pump compression refrigeration system is operating in compressor mode at a high outdoor ambient temperature, the first check valve 121, the first refrigerant pump 14, and the second refrigerant pump 22 are closed, the second check valve 141 is open, and the first compressor 12 and / or the second compressor 21 are turned on and running. The refrigerant flows along the first compression circuit formed by the evaporator 11, the first compressor 12 / second compressor 21, the condenser 13, the second check valve 141, and the throttling device 15. That is, the refrigerant refrigerates through a cycle of compression, condensation, throttling, and evaporation via the aforementioned devices. When the outdoor unit ambient temperature is low, the system can switch to refrigerant pump mode. In this mode, the second check valve 141, the first compressor 12 and the second compressor 21 are closed, the first check valve 121 is open, the first refrigerant pump 14 / second refrigerant pump 22 is turned on and runs, and the refrigerant flows along the first refrigerant pump circuit consisting of the evaporator 11, the first check valve 121, the condenser 13, the first refrigerant pump 14 / second refrigerant pump 22 and the throttling device 15. That is, the cold source of the outdoor unit environment is used for pre-cooling or direct cooling, reducing or avoiding the operation of the first compressor 12 and / or the second compressor 21, reducing energy consumption and improving energy efficiency.

[0074] The technical solution of this application is described below with reference to specific embodiments. Embodiment 1: Switching mode process:

[0075] Step S10: Obtain the operating temperature range of the first compressor 12 and the second compressor 21, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system. Based on the operating temperature range of the first compressor 12 and the second compressor 21, the required cooling capacity of the refrigerant pump compression refrigeration system, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system, dynamically control the start-stop status and actual operating frequency of the first compressor 12 and the second compressor 21.

[0076] The specific steps include:

[0077] Step S101: Determine whether the ambient temperature of the outdoor unit is within the operating temperature range of the first compressor 12 and the second compressor 21;

[0078] Step S102: When the ambient temperature of the outdoor unit is within the operating temperature range of the first compressor 12 and the second compressor 21, if the load required by the refrigerant pump compression refrigeration system is large, the first compressor 12 and the second compressor 21 are turned on and run, and the first compressor 12 and the second compressor 21 run at high frequency.

[0079] In step S103, when the ambient temperature of the outdoor unit is within the operating temperature range of the first compressor 12 and the second compressor 21, if the required cooling capacity of the refrigerant pump compression refrigeration system is small, the first compressor 12 is turned on and running, the second compressor 21 is turned off, and the first compressor 12 operates at a low frequency.

[0080] For example, if the operating temperature of the first compressor 12 and the second compressor 21 is 20℃~35℃, and the outdoor ambient temperature is 20℃~35℃, and the load scenario requires cooling, the refrigerant pump compression refrigeration system adopts the compressor operation mode, that is, the first compressor 12 and the second compressor 21 are turned on and run. At this time, the start-stop status and operating frequency of the first compressor 12 and the second compressor 21 during operation are adjusted according to the required cooling capacity of the load environment.

[0081] Step S20: Set the mode switching temperature of the refrigerant pump compression refrigeration system and set the preset operating frequency of the first compressor 12. Based on the operating temperature range of the first compressor 12 and the second compressor 21, the relationship between the outdoor ambient temperature and the mode switching temperature, the start / stop status of the second compressor 21, and the relationship between the actual operating frequency and the preset operating frequency of the first compressor 12, the operating mode of the refrigerant pump compression refrigeration system is dynamically controlled.

[0082] In step S20, the mode switching temperature of the refrigerant pump compression refrigeration system is set, and the preset operating frequency of the first compressor 12 is set. Specific steps include:

[0083] Step S201: Obtain the first cooling capacity provided by the first compressor 12 at the lowest operating frequency, and obtain the second cooling capacity provided by the first refrigerant pump 14 in the pre-cooling mode;

[0084] Step S202: Determine the preset operating frequency of the first compressor 12 based on the first cooling capacity and the second cooling capacity, wherein the third cooling capacity provided by the first compressor 12 at the preset operating frequency is greater than the sum of the first cooling capacity and the second cooling capacity.

[0085] In step S201, the second cooling capacity provided by the first refrigerant pump 14 in pre-cooling mode is obtained, and the specific steps include:

[0086] Step S2011: With the first refrigeration system 1 turned on and running and the second refrigeration system 2 turned off, obtain the outdoor ambient temperature of the first refrigeration system 1 and set the mode switching temperature of the first refrigeration system 1.

[0087] In step S2012, when the ambient temperature of the outdoor unit is lower than the mode switching temperature of the first refrigeration system 1, the first refrigeration system 1 is controlled to switch from the operation of the first compressor 12 to the operation of the first refrigerant pump 14. That is, the first compression circuit is closed and the first refrigerant pump circuit is opened. At this time, the first refrigeration system 1 is in pre-cooling mode, and the second cooling capacity provided by the first refrigerant pump 14 in pre-cooling mode can be obtained.

[0088] In some implementations, the operating mode of the refrigerant pump compression refrigeration system is dynamically controlled based on the relationship between the operating temperature ranges of the first compressor 12 and the second compressor 21, the outdoor ambient temperature and the mode switching temperature, the start / stop status of the second compressor 21, and the relationship between the actual operating frequency and the preset operating frequency of the first compressor 12; specifically, the following three modes are included:

[0089] Mode 1: When the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system is higher than the mode switching temperature, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system is within the operating temperature range of the first compressor 12 and the second compressor 21, the first compressor 12 and the second compressor 21 are kept running normally, and the start-stop status and actual operating frequency of the first compressor 12 and the second compressor 21 are dynamically controlled according to the cooling capacity required by the load of the refrigerant pump compression refrigeration system.

[0090] In Mode 1, if the load requires a high cooling capacity, the first compressor 12 and the second compressor 21 are turned on and run, and the first compressor 12 and the second compressor 21 operate at a high frequency; if the load requires a low cooling capacity, at least one of the first compressor 12 and the second compressor 21 is turned on and run, and at least one of the first compressor 12 and the second compressor 21 operates at a low frequency.

[0091] Mode 2: When the outdoor ambient temperature of the refrigerant pump compression refrigeration system is lower than the mode switching temperature, and the first compressor 12 and the second compressor 21 are operating normally, the second refrigeration system 2 is controlled to switch from the operation of the second compressor 21 to the operation of the second refrigerant pump 22.

[0092] In Mode 2, it is understandable that the first compressor 12 and the second compressor 21 operate normally, meaning that the environment where the load is located requires a large amount of cooling.

[0093] Mode 3: When the outdoor ambient temperature of the refrigerant pump compression refrigeration system is lower than the mode switching temperature, and the first compressor 12 is turned on and running while the second compressor 21 is not turned on, if the actual operating frequency of the first compressor 12 is greater than the preset operating frequency, the second refrigerant pump 22 is controlled to turn on and run.

[0094] In Mode 3, it is understandable that if the actual operating frequency of the first compressor 12 is greater than the preset operating frequency, that is, the load environment requires more cooling capacity, but the outdoor unit ambient temperature is low, the second refrigerant pump 22 can be turned on to cool down the system and reduce the system's energy consumption.

[0095] Example 2:

[0096] Unlike Example 1, the refrigerant pump compression refrigeration system includes only one compressor and one refrigerant pump, specifically:

[0097] Example 2 provides a control method for a fluorine pump compression refrigeration system. Please refer to [link / reference]. Figure 3 and Figure 4 The refrigerant pump compression refrigeration system includes a third refrigeration system 3 located on the leeward side and a fourth refrigeration system 4 located on the windward side. The third refrigeration system 3 includes a third compressor 31, and the fourth refrigeration system 4 includes a third refrigerant pump 41. The control method of the refrigerant pump compression refrigeration system includes:

[0098] The operating temperature range of the third compressor 31 and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system are obtained. Based on the operating temperature range of the third compressor 31, the required cooling capacity of the refrigerant pump compression refrigeration system, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system, the start-stop status and actual operating frequency of the third compressor 31 are dynamically controlled.

[0099] The mode switching temperature of the refrigerant pump compression refrigeration system is set, and the preset operating frequency of the third compressor 31 is set. The operating mode of the refrigerant pump compression refrigeration system is dynamically controlled based on the relationship between the operating temperature range of the third compressor 31, the ambient temperature of the outdoor unit and the mode switching temperature, and the relationship between the actual operating frequency of the third compressor 31 and the preset operating frequency.

[0100] When the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system is higher than the mode switching temperature, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system is within the operating temperature range of the third compressor 31, the normal operation of the third compressor 31 is maintained, and the start-stop status and actual operating frequency of the third compressor 31 are dynamically controlled according to the cooling capacity required by the load of the refrigerant pump compression refrigeration system.

[0101] When the outdoor ambient temperature of the refrigerant pump compression refrigeration system is lower than the mode switching temperature and the third compressor 31 is operating normally, if the actual operating frequency of the third compressor 31 is greater than the preset operating frequency, the third refrigerant pump 41 will be controlled to start and run.

[0102] In the above-mentioned solution, the control method of the refrigerant pump compression refrigeration system provided in this application, when the compressor of the refrigerant pump compression refrigeration system is normally turned on and running, dynamically controls the refrigerant pump compression refrigeration system to operate in compressor mode or pre-cooling mode by acquiring the magnitude of the outdoor unit ambient temperature and the mode switching temperature, as well as the magnitude of the relationship between the actual operating frequency and the preset operating frequency of the third compressor 31. That is, the technical solution of this application determines the mode switching logic of the system based on the outdoor unit ambient temperature and the operating status of each component in the refrigerant pump compression refrigeration system, thereby reducing the temperature fluctuation of the load space caused by the mode switching of the system when the external temperature changes, and ensuring the temperature control effect of the system.

[0103] In some implementations, the refrigerant pump compression refrigeration system includes a compressor mode and a pre-cooling mode. When the refrigerant pump compression refrigeration system is in compressor mode, the third compressor 31 of the third refrigeration system 3 is turned on and runs. When the refrigerant pump compression refrigeration system is in pre-cooling mode, the third refrigerant pump 41 of the fourth refrigeration system 4 runs to reduce the energy consumption of the system.

[0104] In some embodiments, the third refrigeration system 3 and the fourth refrigeration system 4 have partially identical structures. The third refrigeration system 3 includes an evaporator 11, a third compressor 31, a condenser 13, and a throttling device 15 connected by pipes. The fourth refrigeration system 4 includes an evaporator 11, a condenser 13, a third refrigerant pump 41, and a throttling device 15 connected by pipes. In the third refrigeration system 3, the evaporator 11, the third compressor 31, the condenser 13, and the throttling device 15 constitute a second compression circuit, and the evaporator 11, the condenser 13, the third refrigerant pump 41, and the throttling device 15 constitute a second refrigerant pump circuit. Wherein:

[0105] Evaporator 11 is a heat exchanger for the heat exchange medium in the first compression circuit and the second fluorine pump circuit. The low-temperature and low-pressure heat exchange medium absorbs heat from the environment where the load is located and evaporates into a gaseous state in evaporator 11, thereby reducing the temperature of the environment where the load is located.

[0106] The third compressor 31 can compress the high-temperature, low-pressure gaseous heat exchange medium from the evaporator 11 into a high-temperature, high-pressure heat exchange medium, providing power for the refrigeration cycle.

[0107] The condenser 13 is another heat exchanger. Its function is to cool and condense the high-temperature and high-pressure heat exchange medium from the compressor into a liquid state. During the condensation process, the heat released by the heat exchange medium is transferred to the outside air or water by the outdoor unit.

[0108] The third refrigerant pump 41 can provide a cooling capacity comparable to that of the third compressor 31 in low-temperature environments, but consumes far less power than the third compressor 31, thus achieving energy saving in the refrigeration process.

[0109] The throttling device 15, such as an expansion valve or capillary tube, is used to control the flow rate of the heat exchange medium from the condenser 13 to the evaporator 11, while reducing the pressure of the heat exchange medium from high pressure to low pressure, thus creating conditions for the evaporation of the heat exchange medium in the evaporator 11.

[0110] Understandably, when the outdoor unit ambient temperature is high, the refrigerant pump compression refrigeration system operates in compressor mode. At this time, the second refrigerant pump circuit is closed, and the third compressor 31 is turned on and running. The refrigerant flows along the second compression circuit formed by the evaporator 11, the third compressor 31, the condenser 13, and the throttling device 15. That is, the refrigerant refrigerates by passing through the above devices in a cycle of compression, condensation, throttling, and evaporation. When the outdoor unit ambient temperature is low, the system can switch to refrigerant pump mode. At this time, the second compression circuit is closed, and the third refrigerant pump 41 is turned on and running. The refrigerant flows along the second refrigerant pump circuit formed by the evaporator 11, the condenser 13, the third refrigerant pump 41, and the throttling device 15. That is, the cold source of the outdoor unit environment is used for pre-cooling or direct cooling, reducing or avoiding the operation of the third compressor 31, reducing energy consumption, and improving energy efficiency.

[0111] The process of switching modes described above will be explained below with reference to specific embodiments:

[0112] Step S30: Obtain the operating temperature range of the third compressor 31 and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system. Based on the operating temperature range of the third compressor 31, the required cooling capacity of the refrigerant pump compression refrigeration system, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system, dynamically control the start-stop status and actual operating frequency of the third compressor 31.

[0113] The specific steps include:

[0114] Step S301: Determine whether the outdoor unit ambient temperature is within the operating temperature range of the third compressor 31;

[0115] In step S302, if the outdoor unit ambient temperature is within the operating temperature range of the third compressor 31, and the load required by the refrigerant pump compression refrigeration system is large, the third compressor 31 will operate at a high frequency.

[0116] In step S303, if the ambient temperature of the outdoor unit is within the operating temperature range of the third compressor 31, and the required cooling capacity of the refrigerant pump compression refrigeration system is small, the third compressor 31 will operate at a low frequency.

[0117] For example, if the operating temperature of the third compressor 31 is 20℃~35℃, and the outdoor ambient temperature is 20℃~35℃, and the load scenario requires cooling, the refrigerant pump compression refrigeration system adopts the compressor operation mode, that is, the third compressor 31 is turned on and running. At this time, the start-stop state and operating frequency of the third compressor 31 during operation are adjusted according to the required cooling capacity of the load environment.

[0118] Step S40: Set the mode switching temperature of the refrigerant pump compression refrigeration system and set the preset operating frequency of the third compressor 31. Based on the relationship between the operating temperature range of the third compressor 31, the ambient temperature of the outdoor unit and the mode switching temperature, and the relationship between the actual operating frequency of the third compressor 31 and the preset operating frequency, dynamically control the operating mode of the refrigerant pump compression refrigeration system.

[0119] In step S40, the mode switching temperature of the refrigerant pump compression refrigeration system is set, and the preset operating frequency of the third compressor 31 is set. Specific steps include:

[0120] Step S401: Obtain the fourth cooling capacity provided by the third compressor 31 at the lowest operating frequency;

[0121] Step S402: Determine the preset operating frequency of the third compressor 31 based on the fourth cooling capacity, wherein the fifth cooling capacity provided by the third compressor 31 at the preset operating frequency is greater than the fourth cooling capacity.

[0122] In some implementations, the operating mode of the refrigerant pump compression refrigeration system is dynamically controlled based on the relationship between the operating temperature range of the third compressor 31, the ambient temperature of the outdoor unit, and the mode switching temperature, the start / stop status of the third compressor 31, and the relationship between the actual operating frequency and the preset operating frequency of the third compressor 31; specifically, the following two modes are included:

[0123] Mode 1: When the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system is higher than the mode switching temperature, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system is within the operating temperature range of the third compressor 31, the normal operation of the third compressor 31 is maintained, and the start-stop status and actual operating frequency of the third compressor 31 are dynamically controlled according to the cooling capacity required by the load of the refrigerant pump compression refrigeration system.

[0124] In Mode 1, if the environment where the load is located requires cooling and the required cooling capacity is high, the third compressor 31 is turned on and operates at a high frequency; if the environment where the load is located requires cooling and the required cooling capacity is low, the third compressor 31 is turned on and operates at a low frequency; if the environment where the load is located does not require cooling, the third compressor 31 is turned off.

[0125] Mode 2: When the outdoor ambient temperature of the refrigerant pump compression refrigeration system is lower than the mode switching temperature and the third compressor 31 is operating normally, if the actual operating frequency of the third compressor 31 is greater than the preset operating frequency, the third refrigerant pump 41 is controlled to start and run.

[0126] In Mode 2, it is understandable that if the actual operating frequency of the third compressor 31 is greater than the preset operating frequency, that is, the load environment requires more cooling capacity, but the outdoor unit ambient temperature is low, the third refrigerant pump 41 can be turned on to cool down the system and reduce energy consumption.

[0127] The above description, based on the embodiments shown in the figures, details the structure, features, and effects of the present invention. The above description is only a preferred embodiment of the present invention, but the present invention is not limited to the scope of implementation shown in the figures. Any changes made in accordance with the concept of the present invention, or equivalent embodiments modified to have equivalent changes, that do not exceed the spirit covered by the specification and figures, should be within the protection scope of the present invention.

Claims

1. A control method for a fluorine pump compression refrigeration system, characterized in that, The refrigerant pump compression refrigeration system includes a first refrigeration system located on the leeward side and a second refrigeration system located on the windward side. The first refrigeration system includes a first compressor and a first refrigerant pump, and the second refrigeration system includes a second compressor and a second refrigerant pump. The control method for the refrigerant pump compression refrigeration system includes: The operating temperature ranges of the first compressor and the second compressor, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system are obtained. Based on the operating temperature ranges of the first compressor and the second compressor, the required cooling capacity of the refrigerant pump compression refrigeration system, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system, the start-stop status and actual operating frequency of the first compressor and the second compressor are dynamically controlled. The mode switching temperature of the refrigerant pump compression refrigeration system is set, and the preset operating frequency of the first compressor is set. The operating mode of the refrigerant pump compression refrigeration system is dynamically controlled according to the operating temperature range of the first compressor and the second compressor, the relationship between the outdoor ambient temperature and the mode switching temperature, the start and stop status of the second compressor, and the relationship between the actual operating frequency and the preset operating frequency of the first compressor. When the ambient temperature of the outdoor unit of the fluorine pump compression refrigeration system is higher than the mode switching temperature, and the ambient temperature of the outdoor unit of the fluorine pump compression refrigeration system is within the operating temperature range of the first compressor and the second compressor, the first compressor and the second compressor are kept running normally, and the start-stop status and actual operating frequency of the first compressor and the second compressor are dynamically controlled according to the cooling capacity required by the load of the fluorine pump compression refrigeration system. When the outdoor ambient temperature of the refrigerant pump compression refrigeration system is lower than the mode switching temperature, and the first compressor and the second compressor are operating normally, the second refrigeration system is controlled to switch from operation of the second compressor to operation of the second refrigerant pump. When the outdoor ambient temperature of the refrigerant pump compression refrigeration system is lower than the mode switching temperature, and the first compressor is turned on and running while the second compressor is not turned on, if the actual operating frequency of the first compressor is greater than the preset operating frequency, the second refrigerant pump is controlled to turn on and run.

2. The control method for the fluorine pump compression refrigeration system according to claim 1, characterized in that, The system acquires the operating temperature ranges of the first and second compressors, the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system, and dynamically controls the start-stop status and actual operating frequency of the first and second compressors based on their operating temperature ranges, the required cooling capacity of the refrigerant pump compression refrigeration system, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system; including: Determine whether the outdoor unit's ambient temperature is within the operating temperature range of the first compressor and the second compressor; When the ambient temperature of the outdoor unit is within the operating temperature range of the first compressor and the second compressor, if the load required by the refrigerant pump compression refrigeration system is large, the first compressor and the second compressor will be turned on and run, and the first compressor and the second compressor will run at a high frequency. When the ambient temperature of the outdoor unit is within the operating temperature range of the first compressor and the second compressor, if the required cooling capacity of the refrigerant pump compression refrigeration system is small, the first compressor is turned on and running, the second compressor is turned off, and the first compressor operates at a low frequency.

3. The control method for the fluorine pump compression refrigeration system according to claim 1, characterized in that, Setting the mode switching temperature of the refrigerant pump compression refrigeration system and setting the preset operating frequency of the first compressor includes: Obtain the first cooling capacity provided by the first compressor at the lowest operating frequency, and obtain the second cooling capacity provided by the first refrigerant pump in pre-cooling mode; The preset operating frequency of the first compressor is determined based on the first cooling capacity and the second cooling capacity, wherein the third cooling capacity provided by the first compressor at the preset operating frequency is greater than the sum of the first cooling capacity and the second cooling capacity.

4. The control method for the fluorine pump compression refrigeration system according to claim 3, characterized in that, Obtaining the second cooling capacity provided by the first refrigerant pump in pre-cooling mode includes: With the first refrigeration system turned on and running, and the second refrigeration system turned off, the outdoor ambient temperature of the first refrigeration system is obtained, and the mode switching temperature of the first refrigeration system is set. When the outdoor unit ambient temperature is lower than the mode switching temperature of the first refrigeration system, the first refrigeration system is controlled to switch from the operation of the first compressor to the operation of the first refrigerant pump. At this time, the first refrigeration system is in pre-cooling mode, and the second cooling capacity provided by the first refrigerant pump in pre-cooling mode can be obtained.

5. The control method for the fluorine pump compression refrigeration system according to claim 4, characterized in that, When the outdoor unit ambient temperature is lower than the mode switching temperature of the first refrigeration system, control the first refrigeration system to switch from operation of the first compressor to operation of the first refrigerant pump; including: The first compression circuit is closed, and the first refrigerant pump circuit is open; wherein, the first refrigeration system includes an evaporator, a first compressor, a first check valve, a condenser, a first refrigerant pump, a second check valve, and a throttling device; the evaporator, the first compressor, the condenser, the second check valve, and the throttling device constitute the first compression circuit, and the evaporator, the first check valve, the condenser, the first refrigerant pump, and the throttling device constitute the first refrigerant pump circuit.

6. A control method for a fluorine pump compression refrigeration system, characterized in that, The refrigerant pump compression refrigeration system includes a third refrigeration system located on the leeward side and a fourth refrigeration system located on the windward side. The third refrigeration system includes a third compressor, and the fourth refrigeration system includes a third refrigerant pump. The control method for the refrigerant pump compression refrigeration system includes: The operating temperature range of the third compressor and the ambient temperature of the outdoor unit of the fluorine pump compression refrigeration system are obtained. Based on the operating temperature range of the third compressor, the required cooling capacity of the fluorine pump compression refrigeration system, and the ambient temperature of the outdoor unit of the fluorine pump compression refrigeration system, the start-stop status and actual operating frequency of the third compressor are dynamically controlled. The mode switching temperature of the refrigerant pump compression refrigeration system is set, and the preset operating frequency of the third compressor is set. The operating mode of the refrigerant pump compression refrigeration system is dynamically controlled according to the relationship between the operating temperature range of the third compressor, the outdoor ambient temperature and the mode switching temperature, and the relationship between the actual operating frequency of the third compressor and the preset operating frequency. When the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system is higher than the mode switching temperature, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system is within the operating temperature range of the third compressor, the normal operation of the third compressor is maintained, and the start-stop status and actual operating frequency of the third compressor are dynamically controlled according to the cooling capacity required by the load of the refrigerant pump compression refrigeration system. When the outdoor ambient temperature of the refrigerant pump compression refrigeration system is lower than the mode switching temperature, and the third compressor is operating normally, if the actual operating frequency of the third compressor is greater than the preset operating frequency, the third refrigerant pump is controlled to start and run.

7. The control method for the fluorine pump compression refrigeration system according to claim 6, characterized in that, The system acquires the operating temperature range of the third compressor and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system. Based on the operating temperature range of the third compressor, the required cooling capacity of the refrigerant pump compression refrigeration system, and the ambient temperature of the outdoor unit of the refrigerant pump compression refrigeration system, it dynamically controls the start-stop state and actual operating frequency of the third compressor; including: Determine whether the outdoor unit's ambient temperature is within the operating temperature range of the third compressor; When the ambient temperature of the outdoor unit is within the operating temperature range of the third compressor, if the load required by the refrigerant pump compression refrigeration system is large, the third compressor will operate at a high frequency. When the ambient temperature of the outdoor unit is within the operating temperature range of the third compressor, if the required cooling capacity of the refrigerant pump compression refrigeration system is small, the third compressor will operate at a low frequency.

8. The control method for the fluorine pump compression refrigeration system according to claim 7, characterized in that, Setting the mode switching temperature of the refrigerant pump compression refrigeration system and setting the preset operating frequency of the third compressor, including: Obtain the fourth cooling capacity provided by the third compressor at its lowest operating frequency; The preset operating frequency of the third compressor is determined based on the fourth cooling capacity, wherein the fifth cooling capacity provided by the third compressor at the preset operating frequency is greater than the fourth cooling capacity.

9. The control method for the fluorine pump compression refrigeration system according to claim 6, characterized in that, Controlling the third fluorine pump to start and operate includes: When the second compression circuit is open, the second refrigerant pump circuit is also open; wherein, the third refrigeration system includes an evaporator, a third compressor, a condenser, and a throttling device, and the fourth refrigeration system includes an evaporator, a third refrigerant pump, a condenser, and a throttling device; the evaporator, the third compressor, the condenser, and the throttling device constitute the second compression circuit, and the evaporator, the third refrigerant pump, the condenser, and the throttling device constitute the second refrigerant pump circuit.

10. A fluorine pump compression refrigeration system, characterized in that, The fluorine pump compression refrigeration system adopts the control method of the fluorine pump compression refrigeration system according to any one of claims 1 to 5 or the control method of the fluorine pump compression refrigeration system according to any one of claims 6 to 9.

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