Double-circulation refrigerating system, control method, control device and storage medium

Abstract

The invention discloses a double-circulation refrigerating system, a control method, a control device and a storage medium. The double-circulation refrigerating system comprises a compressor, a refrigerating system and a refrigerating system, the condenser, the fluorine pump, the throttling device and the evaporator are connected in sequence; the fluorine pump bypass flow path is connected with the fluorine pump in parallel; the bypass valve is used for controlling the on-off of the fluorine pump bypass flow path; the control valve is provided with a first valve port, a second valve port, a third valve port and a fourth valve port, and the first valve port, the second valve port, the third valve port and the fourth valve port are connected with the air suction port, the exhaust port, an inlet of the condenser and an outlet of the evaporator in a one-to-one correspondence mode; the control valve has a first working state and a second working state, in the first working state, the first valve port is communicated with the fourth valve port, and the second valve port is communicated with the third valve port; and in the second working state, the first valve port is communicated with the second valve port, and the third valve port is communicated with the fourth valve port. The double-circulation refrigerating system is additionally provided with the control valve, so that the liquid accumulation risk of the compressor during variable-working-condition operation of the fluorine pump is avoided.

Description

Technical Field

[0001] The present application relates to but is not limited to the field of refrigeration technology, and specifically refers to a dual-cycle refrigeration system, a control method, a control device, and a computer-readable storage medium. Background Art

[0002] In a dual-cycle refrigeration system (fluorine pump air-conditioning unit), the compressor and the fluorine pump are connected in series in the system. When the fluorine pump operates under variable conditions (such as startup, frequency increase), the refrigerant at the outlet of the evaporator may become a gas-liquid two-phase state. After the two-phase refrigerant enters the compressor, it will cause liquid accumulation in the compressor, which will affect the reliability of the compressor. Summary of the invention

[0003] The present application provides a dual-circulation refrigeration system, which avoids the risk of liquid accumulation in the compressor when the fluorine pump operates in a variable operating condition by adding a control valve.

[0004] A dual-cycle refrigeration system provided in an embodiment of the present application includes:

[0005] A compressor having an exhaust port and an intake port;

[0006] The condenser, fluorine pump, throttling device and evaporator are connected in sequence;

[0007] a fluorine pump bypass flow path connected in parallel with the fluorine pump and a bypass valve for controlling the on-off of the fluorine pump bypass flow path; and

[0008] a control valve having a first valve port, a second valve port, a third valve port and a fourth valve port, wherein the first valve port, the second valve port, the third valve port and the fourth valve port are respectively connected to the air intake port, the air exhaust port, the inlet of the condenser and the outlet of the evaporator in a one-to-one correspondence;

[0009] The control valve has a first working state and a second working state. In the first working state, the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port; in the second working state, the first valve port is connected to the second valve port, and the third valve port is connected to the fourth valve port.

[0010] The embodiment of the present application further provides a control method for the above-mentioned dual-cycle refrigeration system, the control method comprising:

[0011] Receive mode instructions;

[0012] Based on the received mode instruction being the fluorine pump mode, controlling the control valve to be in the second working state, and controlling the dual-circulation refrigeration system to enter the fluorine pump mode;

[0013] Based on the received mode instruction being the compressor mode, the control valve is controlled to be in a first working state, and the dual-cycle refrigeration system is controlled to enter the compressor mode.

[0014] An embodiment of the present application further provides a control device, including a processor and a memory storing a computer program, wherein the processor implements the steps of the above-mentioned control method when executing the computer program.

[0015] An embodiment of the present application further provides a computer-readable storage medium storing a computer program, which implements the above-mentioned control method when executed by a processor.

[0016] The dual-circulation refrigeration system provided by the embodiment of the present application, when the control valve is in the first working state, the dual-circulation refrigeration system realizes compressor mode refrigeration; when the control valve is in the second working state, the dual-circulation refrigeration system realizes fluorine pump mode refrigeration. In the compressor mode, the first valve port of the control valve in the first working state can be connected to the fourth valve port, and the second valve port can be connected to the third valve port. At this time, the compressor, the control valve, the condenser, the fluorine pump bypass flow path, the throttling device and the evaporator can form a compressor refrigeration circuit, and the refrigerant can pass through the exhaust port of the compressor-control valve (second valve port-third valve port)-condenser-bypass valve-throttling device-evaporator-control valve (fourth valve port-first valve port)-compressor suction port in sequence. In this compressor mode, the fluorine pump is shut down and the compressor is started to provide power for the operation of the refrigerant in the compressor refrigeration circuit.

[0017] In the fluorine pump mode, the first valve port of the control valve in the second working state can be connected to the second valve port, and the third valve port can be connected to the fourth valve port. At this time, the fluorine pump, throttling device, evaporator, control valve and condenser can form a fluorine pump refrigeration circuit, and the refrigerant can pass through the fluorine pump outlet-throttling device-evaporator-control valve (fourth valve port-third valve port)-condenser-fluorine pump inlet in sequence. In this fluorine pump mode, the compressor stops and the fluorine pump starts to provide power for the operation of the refrigerant in the fluorine pump refrigeration circuit.

[0018] When the fluorine pump mode is running, the control valve switches to the second working state, isolating the compressor from the fluorine pump refrigeration circuit, preventing the gas-liquid two-phase refrigerant discharged from the outlet of the evaporator from entering the suction port of the compressor, causing liquid accumulation in the compressor and causing compressor reliability problems. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of the structure of a binary cycle refrigeration system provided in some embodiments of the present application, wherein the binary cycle refrigeration system is in a compressor mode;

[0020] Figure 2A schematic flow chart of a dual-cycle refrigeration system provided in some embodiments of the present application, wherein the dual-cycle refrigeration system is in a fluorine pump mode;

[0021] Figure 3 A flowchart of a control method for a dual-cycle refrigeration system provided in one embodiment of the present application.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1- compressor; 11- exhaust port; 12- air inlet; 2- control valve; 21- first valve port; 22- second valve port; 23- third valve port; 24- fourth valve port; 3- condenser; 4- condensing fan; 5- fluorine pump; 6- bypass valve; 7- throttling device; 8- evaporator; 9- evaporating fan; 10- bypass flow path of fluorine pump. DETAILED DESCRIPTION

[0024] The principles and features of the present application are described below in conjunction with the accompanying drawings. The examples given are only used to explain the present application and are not used to limit the scope of the present application.

[0025] The present application embodiment provides a dual-cycle refrigeration system, such as Figure 1 and Figure 2 As shown, it includes: a compressor 1, a condenser 3, a fluorine pump 5, a throttling device 7, an evaporator 8, a fluorine pump bypass flow path 10, a bypass valve 6 and a control valve 2.

[0026] The compressor 1 has an exhaust port 11 and an intake port 12. The condenser 3, the fluorine pump 5, the throttling device 7 and the evaporator 8 can be connected in sequence. The fluorine pump bypass flow path 10 can be connected in parallel with the fluorine pump 5. The bypass valve 6 can control the opening and closing of the fluorine pump bypass flow path 10.

[0027] The control valve 2 may have a first valve port 21, a second valve port 22, a third valve port 23 and a fourth valve port 24, and the first valve port 21, the second valve port 22, the third valve port 23 and the fourth valve port 24 may be respectively connected to the air intake port 12, the air exhaust port 11, the inlet of the condenser 3 and the outlet of the evaporator 8 in a one-to-one correspondence.

[0028] The control valve 2 can have a first working state and a second working state, such as Figure 1 As shown, in the first working state, the first valve port 21 can be communicated with the fourth valve port 24, and the second valve port 22 can be communicated with the third valve port 23; Figure 2 As shown, in the second working state, the first valve port 21 can be communicated with the second valve port 22 , and the third valve port 23 can be communicated with the fourth valve port 24 .

[0029] The dual-cycle refrigeration system of the embodiment of the present application mainly includes a compressor 1, a fluorine pump 5, an evaporator 8, a condenser 3, a throttling device 7, a control valve 2, a fluorine pump bypass flow path 10, and a bypass valve 6. The outlet of the condenser 3 is connected to the inlet of the fluorine pump 5, the outlet of the fluorine pump 5 is connected to one end of the throttling device 7, and the other end of the throttling device 7 is connected to the inlet of the evaporator 8. The fluorine pump bypass flow path 10 can be arranged in parallel with the fluorine pump 5. The bypass valve 6 is arranged in the fluorine pump bypass flow path 10 and controls the on-off of the fluorine pump bypass flow path 10. The control valve 2 has four valve ports: a first valve port 21, a second valve port 22, a third valve port 23, and a fourth valve port 24. The four valve ports are respectively connected to the air intake port 12 of the compressor 1, the exhaust port 11 of the compressor 1, the inlet of the condenser 3, and the outlet of the evaporator 8 in a one-to-one correspondence.

[0030] like Figure 1 As shown, when the control valve 2 is in the first working state, the dual-cycle refrigeration system realizes compressor mode refrigeration; Figure 2 As shown, when the control valve 2 is in the second working state, the dual-circulation refrigeration system realizes fluorine pump mode refrigeration. Figure 1 As shown, in the compressor mode, the first valve port 21 of the control valve 2 in the first working state can be connected to the fourth valve port 24, and the second valve port 22 can be connected to the third valve port 23. At this time, the compressor 1, the control valve 2, the condenser 3, the fluorine pump bypass flow path 10, the throttling device 7 and the evaporator 8 can form a compressor refrigeration circuit, and the refrigerant can pass through the exhaust port 11 of the compressor 1-control valve 2 (second valve port 22-third valve port 23)-condenser 3-bypass valve 6-throttling device 7-evaporator 8-control valve 2 (fourth valve port 24-first valve port 21)-intake port 12 of the compressor 1. In this compressor mode, the fluorine pump 5 is stopped and the compressor 1 is started to provide power for the operation of the refrigerant in the compressor refrigeration circuit.

[0031] like Figure 2 As shown, in the fluorine pump mode, the first valve port 21 of the control valve 2 in the second working state can be connected to the second valve port 22, and the third valve port 23 can be connected to the fourth valve port 24. At this time, the fluorine pump 5, the throttling device 7, the evaporator 8, the control valve 2 and the condenser 3 can form a fluorine pump refrigeration circuit, and the refrigerant can pass through the outlet of the fluorine pump 5-throttling device 7-evaporator 8-control valve 2 (fourth valve port 24-third valve port 23)-condenser 3-inlet of the fluorine pump 5 in sequence. In this fluorine pump mode, the compressor 1 is stopped and the fluorine pump 5 is started to provide power for the operation of the refrigerant in the fluorine pump refrigeration circuit.

[0032] like Figure 2 As shown, when the fluorine pump mode is running, the control valve 2 switches to the second working state, isolating the compressor 1 from the fluorine pump refrigeration circuit, preventing the gas-liquid two-phase refrigerant discharged from the outlet of the evaporator 8 from entering the suction port 12 of the compressor 1, causing liquid accumulation in the compressor 1 and causing reliability problems for the compressor 1.

[0033] In some exemplary embodiments, the control valve 2 may include a driving element and a valve body, the valve body may include a movable valve core, the driving element may be connected to the valve core and configured to drive the valve core to move so that the control valve 2 can switch between a first working state and a second working state.

[0034] The driving element may be an electric driving element, which may be electrically connected to the control device of the dual-cycle refrigeration system so that the dual-cycle refrigeration system controls the operation of the electric driving element, and further controls the control valve 2 to be in the first working state or the second working state, so as to realize the switching of the dual-cycle refrigeration system between the fluorine pump mode and the compressor mode.

[0035] In some exemplary embodiments, the driving element may include a driving motor, which may drive the valve core to rotate or move, so that the control valve 2 can be switched between the first working state and the second working state.

[0036] In some exemplary embodiments, Figure 1 and Figure 2 As shown, the bypass valve 6 is a one-way valve, which is configured to conduct unidirectionally in the direction from the outlet of the condenser 3 to the inlet of the evaporator 8 .

[0037] In some exemplary embodiments, the throttling device 7 may be a throttling valve, such as an electronic expansion valve, etc. The flow rate of the refrigerant flowing to the evaporator 8 may be adjusted by controlling the opening of the electronic expansion valve.

[0038] In some exemplary embodiments, Figure 1 and Figure 2 As shown, the dual-circulation refrigeration system further includes a condensing fan 4 and an evaporating fan 9. The condensing fan 4 is configured to generate an airflow passing through the condenser 3 when in operation, and the evaporating fan 9 is configured to generate an airflow passing through the evaporator 8 when in operation.

[0039] Among them, the condensing fan 4 can be arranged on one side of the condenser 3 and used to drive the outdoor air to flow through the condenser 3; the evaporating fan 9 can be arranged on one side of the evaporator 8 and used to drive the indoor air to flow through the evaporator 8.

[0040] In some exemplary embodiments, Figure 1 and Figure 2 As shown, the control valve 2 may be a four-way valve having four valve ports.

[0041] The present application also provides a control method for the dual-cycle refrigeration system provided in any of the above embodiments. Figure 3 As shown, the control method includes:

[0042] S202: receiving mode instruction;

[0043] S204: Based on the received mode instruction being the fluorine pump mode, control the control valve to be in the second working state and turn off the compressor, and then start the fluorine pump; based on the received mode instruction being the compressor mode, control the control valve to be in the first working state and turn off the fluorine pump, and then start the compressor.

[0044] The control method of the embodiment of the present application is used for a dual-cycle refrigeration system including a control valve 2 having four valve ports. When the received mode instruction is a fluorine pump mode, the control valve 2 is adjusted to the second working state (such as Figure 2 As shown in the figure, the compressor 1 is isolated from the fluorine pump refrigeration circuit, and the compressor 1 is controlled to be in the off state, and then the fluorine pump 5 is started, so that the dual-circulation refrigeration system enters the fluorine pump mode for refrigeration. In this fluorine pump mode, the compressor 1 is stopped, and the fluorine pump 5 is started to provide power for the operation of the refrigerant.

[0045] When the mode instruction is received as the compressor mode, the control valve 2 is adjusted to the first working state (such as Figure 1 As shown in FIG. 1 , the compressor 1 is connected to the compressor refrigeration circuit, and the fluorine pump 5 is also controlled to be in the off state, and then the compressor 1 is started, so that the dual-circulation refrigeration system enters the compressor mode for refrigeration. In this compressor mode, the fluorine pump 5 is stopped, and the compressor 1 is started to provide power for the operation of the refrigerant.

[0046] In this control method, in the process of controlling the dual-circulation refrigeration system to enter the compressor mode or the fluorine pump mode, the control valve 2 is first adjusted to the first working state or the second working state, and the fluorine pump 5 or the compressor 1 is turned off, and then the compressor 1 or the fluorine pump 5 is started to realize the dual-circulation refrigeration system entering the compressor mode or the fluorine pump mode, thereby avoiding the problem of liquid accumulation in the compressor 1 and thus affecting the reliability of the compressor 1.

[0047] In some exemplary embodiments, the control method further includes: based on the received mode instruction being a fluorine pump mode, before starting the fluorine pump, controlling the throttling device to be at a first preset opening.

[0048] Among them, the first preset opening can be 10%-50% of the rated opening of the throttling device 7 (the maximum opening of the throttling device 7), such as: the first preset opening can be 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50% and the like of the rated opening.

[0049] Before starting the fluorine pump 5 in the fluorine pump mode, the control valve 2 can be adjusted to Figure 2 In the second working state shown, the compressor 1 is turned off, and the throttling device 7 is adjusted to a first preset opening, and then the fluorine pump 5 is started, so as to achieve a successful start of the fluorine pump 5. In the fluorine pump mode, the bypass valve 6 is in a closed state.

[0050] Of course, the first preset opening is not limited to 10%-50% of the rated opening, and can be adjusted as needed.

[0051] In some exemplary embodiments, the control method further includes: based on the received mode instruction being a compressor mode, before starting the compressor, controlling the throttling device to be at a second preset opening.

[0052] The second preset opening is 10%-50% of the rated opening of the throttling device 7, such as the second preset opening can be 10%, 15%, 20%, 25%, 30%, 35%, 40%, 45%, 50% of the rated opening, etc. The first preset opening and the second preset opening can be set to be equal or unequal.

[0053] Before starting compressor 1 in compressor mode, adjust control valve 2 to Figure 1 In the first working state shown, the fluorine pump 5 is turned off, and the throttling device 7 is adjusted to a second preset opening, and then the compressor 1 is started, so as to achieve a successful start of the compressor 1. In the compressor mode, the bypass valve 6 is in the conducting state.

[0054] Of course, the second preset opening is not limited to 10%-50% of the rated opening, and can be adjusted as needed.

[0055] In some exemplary embodiments, the control method further includes: issuing a mode instruction based on indoor and outdoor temperature parameters.

[0056] According to the indoor and outdoor temperature parameters (temperature parameters of indoor and outdoor air), the dual-circulation refrigeration system is controlled to enter the fluorine pump mode or the compressor mode, so that when the outdoor temperature is low, the outdoor natural cold source can be utilized and the fluorine pump 5 can be used instead of the compressor 1 to provide power for the refrigerant circulation, so as to reduce the energy consumption of the dual-circulation refrigeration system and achieve energy-saving effects.

[0057] In some exemplary embodiments, the step of issuing a mode instruction based on indoor and outdoor temperature parameters includes:

[0058] Based on the indoor and outdoor temperature parameters satisfying the first preset condition, the mode instruction issued is the fluorine pump mode;

[0059] Based on the indoor and outdoor temperature parameters satisfying the second preset condition, the mode instruction issued is the compressor mode.

[0060] Among them, the first preset condition includes: the outdoor temperature is lower than the first preset temperature T1, and the indoor and outdoor temperature difference is greater than the first preset temperature difference ΔT1; the second preset condition includes: the outdoor temperature is higher than the second preset temperature T2, or the indoor and outdoor temperature difference is less than the second preset temperature difference ΔT2.

[0061] When the outdoor temperature (the temperature of the outdoor air) is low and the indoor and outdoor temperature difference (the temperature difference between the indoor air and the outdoor air) is large, the dual-circulation refrigeration system can be controlled to enter the fluorine pump mode to make full use of the outdoor natural cold source to cool the indoor temperature. Since the power of the fluorine pump 5 is much smaller than the power of the compressor 1, the power consumption of the dual-circulation refrigeration system can be significantly reduced, which has a significant energy-saving effect.

[0062] When the outdoor temperature is high, or the temperature difference between indoor and outdoor is small, the outdoor natural cold source cannot be used to cool the indoor temperature. Therefore, the dual-circulation refrigeration system can be controlled to enter the compressor mode so that the work of compressor 1 can be used to achieve refrigeration.

[0063] The dual-circulation refrigeration system of the embodiment of the present application can mainly adopt the compressor mode when the outdoor temperature is high in summer; and can mainly adopt the fluorine pump mode when the outdoor temperature is low in winter, so as to achieve the purpose of energy saving and emission reduction.

[0064] In some exemplary embodiments, T1<T2.

[0065] T1<T2, which can avoid the dual-cycle refrigeration system from frequently switching between the fluorine pump mode and the compressor mode, making the dual-cycle refrigeration system run smoothly;

[0066] In some exemplary embodiments, ΔT1>ΔT2.

[0067] ΔT1 is large, that is, the temperature difference between indoor and outdoor is large, at this time, the outdoor natural cold source can be used to cool the indoor temperature; ΔT2 is small, that is, the temperature difference between indoor and outdoor is large, at this time, the outdoor natural cold source cannot be used to cool the indoor temperature, but the compressor 1 is used to do work for cooling.

[0068] In some exemplary embodiments, the value range of T1 is 0-10°C, the value range of ΔT1 is 20°C-30°C, the value range of the difference between T2 and T1 is 1°C-10°C, and the value range of the difference between ΔT1 and ΔT2 is 1°C-10°C.

[0069] The value range of T1 can be 0-10℃, such as: the value of T1 can be 1℃, 2℃, 3℃, 4℃, 5℃, 6℃, 7℃, 8℃, 9℃, 10℃, etc.

[0070] The value range of ΔT1 can be 20℃-30℃, such as: the value of ΔT1 can be 20℃, 21℃, 22℃, 23℃, 24℃, 25℃, 26℃, 27℃, 28℃, 29℃, 30℃, etc.

[0071] The difference between T2 and T1 can range from 1°C to 10°C, that is, the value range of T2 is 1°C to 20°C. For example, the value of T2 can be 1°C, 3°C, 5°C, 8°C, 10°C, 12°C, 15°C, 18°C, 20°C, etc.

[0072] The difference between ΔT1 and ΔT2 ranges from 1°C to 10°C, that is, the value range of ΔT2 is 10°C to 29°C. For example, the value of ΔT2 can be 10°C, 13°C, 15°C, 18°C, 20°C, 22°C, 25°C, 27°C, 29°C, etc.

[0073] It should be understood that the value ranges of T1, T2, ΔT1 and ΔT2 are not limited to the above, and can be adjusted according to actual needs.

[0074] An embodiment of the present application further provides a control device, including a processor and a memory storing a computer program, and when the processor executes the computer program, the steps of the control method provided in any of the above embodiments are implemented.

[0075] The processor may be an integrated circuit chip with signal processing capabilities. The above-mentioned processor may be a general-purpose processor, including a central processing unit (CPU), a network processor (NP), etc.; it may also be a digital signal processor (DSP), an application-specific integrated circuit (ASIC), a field-programmable gate array (FPGA) or other programmable logic devices, discrete gates or transistor logic devices, discrete hardware components. The methods, steps and logic block diagrams disclosed in the embodiments of the present application may be implemented or executed. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

[0076] An embodiment of the present application further provides a computer-readable storage medium storing a computer program, which, when executed by a processor, implements the control method provided in any of the above embodiments.

[0077] In summary, the dual-cycle refrigeration system proposed in the embodiment of the present application mainly includes a compressor 1, a fluorine pump 5, an evaporator 8, a condenser 3, a throttling device 7, a control valve 2, a bypass valve 6, etc. When the control valve 2 is in the first working state (such as Figure 1 As shown in FIG. 1 ), compressor mode refrigeration is realized, and when the control valve 2 is in the second working state (as shown in FIG. Figure 2 As shown) realizes fluorine pump mode refrigeration.

[0078] In the compressor mode, the refrigerant sequentially passes through the compressor 1 - control valve 2 - condenser 3 - bypass valve 6 - throttling device 7 - evaporator 8 - control valve 2 - compressor 1; in the fluorine pump mode, the refrigerant sequentially passes through the fluorine pump 5 - throttling device 7 - evaporator 8 - control valve 2 - condenser 3 - fluorine pump 5. The compressor 1 and the fluorine pump 5 can drive the refrigerant to circulate in the closed compressor refrigeration circuit and the fluorine pump refrigeration circuit, forming a dual - cycle refrigeration system. The evaporator 8 and the evaporation fan 9 are arranged on the indoor side, and the evaporator 8 is used to absorb the heat indoors. The condenser 3 and the condensation fan 4 are arranged on the outdoor side, and the condenser 3 is used to dissipate the heat absorbed by the evaporator 8 to the outdoor environment.

[0079] When the outdoor temperature < T1 and the indoor - outdoor temperature difference > ΔT1, the compressor 1 is turned off, the control valve 2 switches to the second working state, the throttling device 7 is opened to the initial opening degree (the first preset opening degree) of the fluorine pump mode, and the fluorine pump 5 is started to realize the switching from the compressor mode to the fluorine pump mode (or entering the fluorine pump mode from the standby mode).

[0080] When the outdoor temperature > T2 or the indoor - outdoor temperature difference < ΔT2, the fluorine pump 5 is turned off, the control valve 2 switches to the first working state, the throttling device 7 is opened to the initial opening degree (the second preset opening degree) of the compressor mode, and the compressor 1 is started to realize the switching from the fluorine pump mode to the compressor mode (or entering the compressor mode from the standby mode). Among them, T1 < T2 and ΔT1 > ΔT.

[0081] This dual - cycle refrigeration system can not only have the compressor mode and the fluorine pump mode, but also have a hybrid mode. In the hybrid mode, the bypass valve 6 is in the closed state, and the control valve 2 is in the first working state. At this time, the compressor 1, the control valve 2, the condenser 3, the fluorine pump 5, the throttling device 7 and the evaporator 8 form a hybrid refrigeration circuit, and the refrigerant can sequentially flow through the exhaust port 11 of the compressor 1 - control valve 2 (the second valve port 22 - the third valve port 23) - condenser 3 - fluorine pump 5 - throttling device 7 - evaporator 8 - control valve 2 (the fourth valve port 24 - the first valve port 21) - the suction port 12 of the compressor 1. In this hybrid mode, both the fluorine pump 5 and the compressor 1 are started, partially using the outdoor natural cold source. The fluorine pump 5 can compensate for the circulating power of the refrigerant in the hybrid refrigeration circuit, reduce the pressure loss of the refrigerant during the circulation process, enable the compressor 1 to work under the best working conditions, reduce the energy consumption of the compressor 1, improve the refrigeration efficiency, and have a certain energy - saving effect.

[0082] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation and steps, and therefore should not be understood as a limitation on the present application.

[0083] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0084] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0085] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0086] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0087] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and cannot be understood as limitations on the present application. Ordinary technicians in this field can change, modify, replace and modify the above embodiments within the scope of the present application.

[0088] In any one or more of the above exemplary embodiments, the functions described may be implemented in hardware, software, firmware, or any combination thereof. If implemented in software, the functions may be stored on a computer-readable medium or transmitted via a computer-readable medium as one or more instructions or codes, and executed by a hardware-based processing unit. A computer-readable medium may include a computer-readable storage medium corresponding to a tangible medium such as a data storage medium, or a communication medium that facilitates a computer program, such as any medium transmitted from one place to another according to a communication protocol. In this way, a computer-readable medium may generally correspond to a non-temporary tangible computer-readable storage medium or a communication medium such as a signal or carrier wave. A data storage medium may be any available medium that can be accessed by one or more computers or one or more processors to retrieve instructions, codes, and / or data structures for implementing the technology described in the present disclosure. A computer program product may include a computer-readable medium.

[0089] By way of example and not limitation, such computer-readable storage media may include RAM, ROM, EEPROM, CD-ROM or other optical disk storage, magnetic disk storage or other magnetic storage, flash memory, or any other medium that can be used to store the desired program code in the form of instructions or data structures and can be accessed by a computer. Moreover, any connection may also be referred to as a computer-readable medium. For example, if instructions are transmitted from a website, server or other remote source using coaxial cable, fiber optic cable, twisted pair, digital subscriber line (DSL), or wireless technologies such as infrared, radio and microwave, then coaxial cable, fiber optic cable, twisted pair, DSL, or wireless technologies such as infrared, radio and microwave are included in the definition of medium. However, it should be understood that computer-readable storage media and data storage media do not include connections, carrier waves, signals, or other transient (transient) media, but are directed to non-transient tangible storage media. As used herein, disks and optical disks include compact disks (CDs), laser disks, optical disks, digital versatile disks (DVDs), floppy disks, or Blu-ray disks, etc., where disks typically reproduce data magnetically, while optical disks use lasers to reproduce data optically. Combinations of the above should also be included within the scope of computer-readable media.

[0090] For example, instructions may be executed by one or more processors such as one or more digital signal processors (DSPs), general purpose microprocessors, application specific integrated circuits (ASICs), field programmable logic arrays (FPGAs), or other equivalent integrated or discrete logic circuits. Thus, the term "processor" as used herein may refer to any of the above structures or any other structures suitable for implementing the techniques described herein. Additionally, in some aspects, the functionality described herein may be provided within dedicated hardware and / or software modules configured for encoding and decoding, or incorporated in a combined codec. Also, the techniques may be fully implemented in one or more circuits or logic elements.

[0091] The technical solutions of the embodiments of the present disclosure can be implemented in a wide variety of devices or equipment, including wireless mobile phones, integrated circuits (ICs) or a group of ICs (e.g., chipsets). Various components, modules or units are described in the embodiments of the present disclosure to emphasize the functional aspects of the devices configured to perform the described techniques, but they do not necessarily need to be implemented by different hardware units. Instead, as described above, the various units can be combined in a codec hardware unit or provided by a collection of inter-step hardware units (including one or more processors as described above) in combination with suitable software and / or firmware.

Claims

1. A dual-cycle refrigeration system, characterized in that: include: A compressor having an exhaust port and an intake port; The condenser, fluorine pump, throttling device and evaporator are connected in sequence; A fluorine pump bypass flow path connected in parallel with the fluorine pump and a bypass valve for controlling the on-off of the fluorine pump bypass flow path; as well as a control valve having a first valve port, a second valve port, a third valve port and a fourth valve port, wherein the first valve port, the second valve port, the third valve port and the fourth valve port are respectively connected to the air intake port, the air exhaust port, the inlet of the condenser and the outlet of the evaporator in a one-to-one correspondence; The control valve has a first working state and a second working state. In the first working state, the first valve port is connected to the fourth valve port, and the second valve port is connected to the third valve port; in the second working state, the first valve port is connected to the second valve port, and the third valve port is connected to the fourth valve port.

2. The dual-cycle refrigeration system according to claim 1, characterized in that: The control valve comprises a driving element and a valve body, wherein the valve body comprises a movable valve core, and the driving element is connected to the valve core and is configured to drive the valve core to move so that the control valve switches between the first working state and the second working state.

3. The dual-cycle refrigeration system according to claim 1 or 2, characterized in that: The bypass valve is a one-way valve, and the one-way valve is configured to conduct one-way flow from the outlet of the condenser to the inlet of the evaporator; The dual-circulation refrigeration system further comprises a condensing fan and an evaporating fan. The condensing fan is configured to generate an airflow passing through the condenser when in operation, and the evaporating fan is configured to generate an airflow passing through the evaporator when in operation.

4. A control method, characterized in that: For the dual-cycle refrigeration system according to any one of claims 1 to 3, the control method comprises: Receive mode instructions; Based on the received mode instruction being a fluorine pump mode, controlling the control valve to be in a second working state and shutting down the compressor, and then starting the fluorine pump; Based on the received mode instruction being the compressor mode, the control valve is controlled to be in the first working state and the fluorine pump is turned off, and then the compressor is started.

5. The control method according to claim 4, characterized in that: Also includes: Based on the received mode instruction being a fluorine pump mode, before starting the fluorine pump, controlling the throttling device to be at a first preset opening; Based on the received mode instruction being the compressor mode, before starting the compressor, the throttling device is controlled to be at a second preset opening.

6. The control method according to claim 5, characterized in that: The first preset opening is 10%-50% of the rated opening, and the second preset opening is 10%-50% of the rated opening.

7. The control method according to any one of claims 4 to 6, characterized in that: Also includes: The mode instruction is issued based on indoor and outdoor temperature parameters.

8. The control method according to claim 7, characterized in that: The issuing of the mode instruction based on the indoor and outdoor temperature parameters comprises: Based on the indoor and outdoor temperature parameters satisfying the first preset condition, the mode instruction issued is the fluorine pump mode; Based on the indoor and outdoor temperature parameters satisfying a second preset condition, the mode instruction issued is the compressor mode; Wherein, the first preset condition includes: the outdoor temperature is lower than the first preset temperature T1, and the indoor and outdoor temperature difference is greater than the first preset temperature difference ΔT1; The second preset condition includes: the outdoor temperature is greater than the second preset temperature T2, or the indoor and outdoor temperature difference is less than the second preset temperature difference ΔT2.

9. The control method according to claim 8, characterized in that: T1<T2, ΔT1>ΔT2.

10. The control method according to claim 9, characterized in that: The value range of T1 is 0-10℃, the value range of ΔT1 is 20℃-30℃, the value range of the difference between T2 and T1 is 1℃-10℃, and the value range of the difference between ΔT1 and ΔT2 is 1℃-10℃.

11. A control device, characterized in that: The system comprises a processor and a memory storing a computer program, wherein when the processor executes the computer program, the steps of the control method according to any one of claims 4 to 10 are implemented.

12. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the control method according to any one of claims 4 to 10 is implemented.

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