Refrigerating system, control method thereof, air conditioner and computer readable storage medium

Abstract

The application discloses a refrigeration system and a control method thereof, an air conditioner and a computer readable storage medium, and belongs to the technical field of new energy sources.The refrigeration system comprises a four-way valve, a compression device, a condenser, an evaporator, a throttling device and a separation device.The input end and the output end of the compression device are communicated with the four-way valve respectively.The condenser is communicated with the four-way valve.The evaporator is communicated with the four-way valve.The throttling device is communicated with the condenser and the evaporator respectively.The separation device is communicated with the evaporator and the four-way valve.When the refrigeration system starts a dehumidification mode, the passage between the evaporator and the separation device is conducted to make the mixed refrigerant flowing through the evaporator be divided into the separation device, so that the evaporation pressure of the evaporator is reduced, and then the heat exchange efficiency and the dehumidification effect are improved.The extreme dehumidification can be realized based on the refrigeration system, and a dehumidifier does not need to be additionally arranged, so that the cost of users is saved.

Description

Technical Field

[0001] This invention relates to the field of air conditioning technology, and more particularly to refrigeration systems and control methods thereof, air conditioners, and computer-readable storage media. Background Technology

[0002] Most household air conditioners have a dehumidification function, which is often used when the indoor environment is humid. However, this dehumidification function is limited by the evaporation pressure and its dehumidification effect is limited.

[0003] To address this, dehumidifiers were specifically designed for dehumidification. However, in actual use, to ensure comfort, air conditioners are often turned on simultaneously with dehumidifiers for temperature control. However, if air conditioners and dehumidifiers are used for temperature control and dehumidification at the same time, the temperature and humidity parameters affect each other, and the air conditioner and dehumidifier operate independently with different energy configurations. This makes it difficult to coordinate temperature and humidity control and also causes energy loss, increasing the cost of dehumidifiers and taking up more space. Summary of the Invention

[0004] The main objective of this invention is to provide a refrigeration system and its control method, an air conditioner, and a computer-readable storage medium, aiming to solve the technical problem of how to improve the heat exchange efficiency and dehumidification effect of the refrigeration system.

[0005] To achieve the above objectives, the present invention provides a refrigeration system, the refrigeration system comprising:

[0006] A four-way valve, comprising a first port, a second port, a third port, and a fourth port, wherein the first port and the second port are connected, and the third port and the fourth port are connected.

[0007] A compression device, wherein the input end and the output end of the compression device are respectively connected to the first port and the third port;

[0008] A condenser, which is connected to the fourth port;

[0009] Evaporator, the evaporator being connected to the second port;

[0010] A throttling device, which is connected to both the condenser and the evaporator;

[0011] A separation device, which is connected to the evaporator and the second port, is used to separate the mixed refrigerant from the evaporator;

[0012] When the refrigeration system starts the dehumidification mode and the compression frequency of the compression device and the temperature of the evaporator meet the preset conditions, the passage between the evaporator and the separation device is opened, so that the mixed refrigerant flowing through the evaporator is diverted into the separation device for phase separation.

[0013] Optionally, the compression device includes:

[0014] The compressor, the output of which is connected to the third port;

[0015] A liquid storage tank, the input end of which is connected to the first port, and the output end of which is connected to the input end of the compressor.

[0016] Optionally, the throttling device includes:

[0017] An outdoor electrical control unit, used to control the refrigeration system;

[0018] A first throttling component is connected to the condenser and the outdoor electrical control unit;

[0019] The second throttling component is connected to the evaporator and the outdoor electrical control.

[0020] Optionally, the separation device includes:

[0021] A phase separator is provided, wherein a diversion path and a return path are provided between the phase separator and the evaporator; wherein the inlet of the diversion path is connected to the evaporator, and the outlet of the diversion path is connected to the phase separator, and the diversion path is used to divert the mixed refrigerant in the evaporator to the phase separator; the inlet of the return path is connected to the phase separator, and the outlet of the return path is connected to the evaporator, and the return path is used to output the liquid refrigerant from the phase separator to the evaporator;

[0022] A first refrigerant regulating device is disposed between the phase separator and the four-way valve;

[0023] The second refrigerant regulating device is disposed on the return flow path.

[0024] Furthermore, to achieve the above objectives, the present invention also provides a control method for a refrigeration system, which is applied to the refrigeration system described above, and the control method includes the following steps:

[0025] Dynamically monitor the operating mode of the refrigeration system;

[0026] When the refrigeration system is in dehumidification mode, the current operating frequency of the compressor in the compression device and the current temperature of the evaporator are dynamically detected.

[0027] When the compressor's current operating frequency reaches a preset frequency, the operating state of the separation device is changed according to the current temperature of the evaporator, so that the operating state of the separation device switches between a closed state and an open state. When the operating state of the separation device is in the open state, the mixed refrigerant from the evaporator enters the separation device for phase separation.

[0028] Optionally, the separation device includes a phase separator and a first refrigerant regulating device, and the step of changing the operating state of the separation device according to the current temperature of the evaporator includes:

[0029] When the current temperature of the evaporator is less than the preset stable temperature threshold, the first refrigerant regulating device in the separation device is turned on, so that the operating state of the separation device is switched to the on state, so that the phase separator separates the mixed refrigerant from the evaporator to obtain gaseous refrigerant and outputs it to the compression device.

[0030] Optionally, the separation device further includes a second refrigerant regulating device, and the step of changing the operating state of the separation device according to the current temperature of the evaporator further includes:

[0031] When the current temperature of the evaporator is less than the preset stable temperature threshold, the second refrigerant regulating device in the separation device is turned on, so that the operating state of the separation device is switched to the on state, so that the phase separator separates the mixed refrigerant from the evaporator to obtain liquid refrigerant and outputs it to the evaporator.

[0032] Optionally, the step of changing the operating state of the separation device according to the current temperature of the evaporator further includes:

[0033] Gradually increase the opening degree of the first refrigerant regulating device and the second refrigerant regulating device until the current temperature of the evaporator is greater than the temperature at the previous moment, then adjust the opening degree of the first refrigerant regulating device and the second refrigerant regulating device to the opening degree at the previous moment.

[0034] Optionally, the step of changing the operating state of the separation device according to the current temperature of the evaporator further includes:

[0035] When the current temperature of the evaporator is greater than the preset stable temperature threshold, the first refrigerant regulating device and the second refrigerant regulating device in the separation device are turned off.

[0036] In addition, to achieve the above objectives, the present invention also provides an air conditioner, the air conditioner including the refrigeration system as described above, a memory, a processor, and a control program for the refrigeration system stored in the memory and executable on the processor, wherein when the control program for the refrigeration system is executed by the processor, it implements the steps of the control method for the refrigeration system as described above.

[0037] In addition, to achieve the above objectives, the present invention also provides a computer-readable storage medium storing a control program for a refrigeration system, wherein the control program for the refrigeration system, when executed by a processor, implements the steps of the control method for the refrigeration system as described above.

[0038] This invention proposes a refrigeration system and its control method, an air conditioner, and a computer-readable storage medium, overcoming the problems of energy loss, increased cost, and additional space occupation caused by the poor dehumidification effect of existing air conditioners, which require the use of dehumidifiers. This invention improves the refrigeration system by adding a refrigerant path containing a separation device between the evaporator and the four-way valve. When the refrigeration system starts dehumidification mode and the operating frequency of the compressor and the temperature of the evaporator meet certain conditions, the separation device diverts a portion of the mixed refrigerant flowing through the evaporator and performs phase separation on the diverted mixed refrigerant. The separated gaseous refrigerant is directly output to the four-way valve, and the separated liquid refrigerant is output to the evaporator for evaporation. This avoids the problem of excessively high evaporation pressure in the evaporator due to the evaporation of mixed refrigerant, effectively reducing the evaporator's evaporation pressure, thereby enhancing the heat exchange efficiency and dehumidification effect of the refrigeration system. Ultimate dehumidification can be achieved solely based on the refrigeration system, eliminating the need for an additional dehumidifier and saving costs for users. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of an embodiment of the refrigeration system of the present invention;

[0040] Figure 2 This is a schematic diagram of the hardware structure involved in the operation of an embodiment of the present invention;

[0041] Figure 3 This is a flowchart illustrating an embodiment of the control method for the refrigeration system of the present invention.

[0042] The realization of the objective, functional features and advantages of the present invention will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0043] It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0044] This invention provides a refrigeration system, referring to... Figure 1 , Figure 1 This is a schematic diagram of the structure of an embodiment of the refrigeration system of the present invention.

[0045] In this embodiment, the refrigeration system includes:

[0046] Four-way valve 10, the four-way valve 10 includes a first port 101, a second port 102, a third port 103 and a fourth port 104, the first port 101 and the second port 102 are connected, the third port 103 and the fourth port 104 are connected;

[0047] Compression device 20, the input end and the output end of the compression device 20 are respectively connected to the first port 101 and the third port 103;

[0048] Condenser 30, wherein condenser 30 is connected to the fourth port 104;

[0049] Evaporator 40, which is connected to the second port 102;

[0050] A throttling device 50 is connected to the condenser 30 and the evaporator 40 respectively;

[0051] A separation device 60 is connected to the evaporator 40 and the second port 102, and the separation device 60 is used to separate the mixed refrigerant from the evaporator 40;

[0052] When the refrigeration system starts the dehumidification mode and the compression frequency of the compression device 20 and the temperature of the evaporator 40 meet the preset conditions, the passage between the evaporator 40 and the separation device 60 is opened, so that the mixed refrigerant flowing through the evaporator 40 is diverted into the separation device 60 for phase separation.

[0053] It should be noted that the refrigeration system can be applied to air conditioners, which can be any type of air conditioner with indoor and outdoor units, such as wall-mounted air conditioners, cabinet air conditioners, window air conditioners, multi-split air conditioners, and ceiling-mounted air conditioners.

[0054] In this embodiment, the four-way valve 10 is a control valve with four ports, used to switch between cooling and heating modes. Its working principle is as follows: When the solenoid valve coil is de-energized, the pilot slide valve moves to the left under the drive of the right compression spring. High-pressure gas enters the capillary tube and then the right piston chamber. Meanwhile, gas from the left piston chamber is discharged. Due to the pressure difference between the two ends of the piston, the piston and the main slide valve move to the left, connecting the exhaust pipe to the outdoor unit connection pipe. The other two connection pipes are also connected, forming a cooling cycle. When the solenoid valve coil is energized, the pilot slide valve overcomes the tension of the compression spring and moves to the right under the magnetic force generated by the solenoid coil. High-pressure gas enters the capillary tube and then the left piston chamber. Meanwhile, gas from the right piston chamber is discharged. Due to the pressure difference between the two ends of the piston, the piston and the main slide valve move to the right, connecting the exhaust pipe to the indoor unit connection pipe. The other two connection pipes are also connected, forming a heating cycle.

[0055] As an example, in this embodiment, the compression device 20 includes:

[0056] Compressor 200, the output end of which is connected to the third port 103;

[0057] The liquid storage tank 201 has its input end connected to the first port 101 and its output end connected to the input end of the compressor 200.

[0058] It should be noted that in this embodiment, the compressor 200 is a driven fluid machine that elevates low-pressure gas to high-pressure gas. It is used to compress and transport refrigerant and is the heart of the refrigeration system. It draws in low-temperature, low-pressure refrigerant gas through the suction pipe, compresses it via a piston driven by a motor, and then discharges high-temperature, high-pressure refrigerant gas through the exhaust pipe, providing power for the refrigeration cycle. This achieves the refrigeration cycle of compression → condensation (heat release) → expansion → evaporation (heat absorption). Figure 1 It can be seen that the arrow indicates the direction of refrigerant flow in cooling mode.

[0059] In this embodiment, the condenser 30 and evaporator 40 are devices that transfer part of the heat from a hot fluid to a cold fluid, also known as heat exchangers. They are energy-saving devices that enable heat transfer between two or more fluids at different temperatures. Optionally, they can be floating head heat exchangers, fixed tube sheet heat exchangers, U-tube sheet heat exchangers, plate heat exchangers, etc. In this embodiment, a plate heat exchanger is used as an example, and the specific types of the condenser 30 and evaporator 40 are not limited. The condenser 30 includes two ports for providing a channel for the flowing refrigerant, and the evaporator 40 includes four ports. Specifically, two of these ports are connected to the separation device 60.

[0060] As an example, in this embodiment, the throttling device 50 includes: an outdoor electrical control 500 for controlling the refrigeration system; a first throttling component 501 connected to the condenser 30 and the outdoor electrical control 500; and a second throttling component 502 connected to the evaporator 40 and the outdoor electrical control 500.

[0061] It is understood that the first throttling component 501 is used to throttle the refrigerant from the condenser 30, and the outdoor electrical control 500 is used to exchange heat with the refrigerant after throttling by the first throttling component 501. The throttled refrigerant pre-cools the outdoor electrical control components through the heat exchanger, so that the heat generated by the electrical control can be effectively transferred, avoiding the problem of overheating of the electrical control components and improving the reliability of the electrical control components. The second throttling component 502 is used to throttle the refrigerant after it has passed through the outdoor electrical control 500.

[0062] As an example, in this embodiment, the separation device 60 includes: a phase separator 600, wherein a diversion path and a return path are provided between the phase separator 600 and the evaporator 40; wherein the inlet of the diversion path is connected to the evaporator 40, and the outlet of the diversion path is connected to the phase separator 600, and the diversion path is used to divert the mixed refrigerant in the evaporator 40 to the phase separator 600; the inlet of the return path is connected to the phase separator 600, and the outlet of the return path is connected to the evaporator 40, and the return path is used to output the liquid refrigerant from the phase separator 600 to the evaporator 40; a first refrigerant regulating device 601, which is disposed between the phase separator 600 and the four-way valve 10; and a second refrigerant regulating device 602, which is disposed on the return path.

[0063] As an example, in this embodiment, the first refrigerant regulating device 601 and the second refrigerant regulating device 602 can be a solenoid valve, an electronic expansion valve, or other types of refrigerant flow regulating devices. The operating parameters of the first refrigerant regulating device 601 and the second refrigerant regulating device 602 (such as opening or closing, increasing the opening degree, decreasing the opening degree, or maintaining the opening degree) can be determined based on the actual operating conditions of the air conditioner. Different operating conditions can correspond to different operating parameters of the first refrigerant device 601 and the second refrigerant regulating device 602.

[0064] This embodiment only discusses the case where the refrigeration system is working in refrigeration mode and dehumidification mode. In both modes, the connection status of each port in the four-way valve 10 is that the first port 101 and the second port 102 are connected, and the third port 103 and the fourth port 104 are connected.

[0065] In this embodiment, when the refrigeration system is in refrigeration mode, the gaseous refrigerant compressed and discharged by the compressor 20 is transported to the condenser 30 through the four-way valve 10. After the heat dissipation and condensation process, it is transported to the throttling device 50 for throttling, cooling and depressurization. After becoming low-pressure refrigerant, it enters the refrigerant pipeline of the evaporator 40 for heat absorption and evaporation. At this time, the first refrigerant regulating device 601 and the second refrigerant regulating device 602 are both closed, so the refrigerant directly returns to the compressor 20 through the four-way valve 10 for compression, and the cycle repeats.

[0066] When the dehumidification mode of the refrigeration system is activated, both the first refrigerant regulating device 601 and the second refrigerant regulating device 602 will open. The gaseous refrigerant compressed and discharged by the compressor 20 is transported to the condenser 30 through the four-way valve 10. After the heat dissipation and condensation process, it is transported to the throttling device 50 for throttling, cooling, and pressure reduction. After becoming low-pressure refrigerant, it enters the refrigerant pipeline of the evaporator 40 for heat absorption and evaporation. Part of the refrigerant flowing into the evaporator 40 will enter the phase separator 600 through the branching path between the phase separator 600 and the evaporator 40 for phase separation. The gaseous phase after separation enters the return gas pipe directly through the first refrigerant regulating device 601 and then enters the compressor 200 through the liquid storage tank 201. The liquid phase after separation flows back into the evaporator 40 through the second refrigerant regulating device 602, and after absorbing heat and evaporating again, it is converted into gaseous refrigerant. Then, it enters the compressor 200 through the liquid storage tank 202 for compression. This cycle is repeated, which reduces the evaporation pressure of the evaporator, thereby improving the heat exchange efficiency and dehumidification effect. It can achieve the effect of extreme dehumidification without the need to add a dehumidifier, saving costs for users.

[0067] As an example, in this embodiment, the refrigeration system further includes: a frequency sensor 202, which is disposed between the compressor 200 and the four-way valve 10; and a temperature sensor 603, which is disposed on the branch flow path between the evaporator 40 and the phase separator 600.

[0068] It should be noted that in this embodiment, after the dehumidification mode is turned on, the compressor operating frequency Fr and the temperature T in the middle of the evaporator are detected every first preset time period (for example, 2 minutes) until Fr = Ft (the maximum target frequency), and the air volume of the internal blower is controlled to operate at a strong wind, and the set temperature of the air conditioner is controlled at about 16 degrees (assuming that the dehumidification effect of the air conditioner is the best at 16 degrees, and it is not limited to 16 degrees). At this time, the dehumidification amount reaches the maximum. After the air conditioner operates stably, the value of T at this time is recorded as T0. At this time, the first refrigerant regulating device 601 and the second refrigerant regulating device 602 are turned on. It can be understood that the preset condition is that the compression frequency of the compression device 20 reaches the maximum target frequency and the temperature of the evaporator 40 reaches the stable operating temperature. The first refrigerant regulating device 601 and the second refrigerant regulating device 602 both enter the preset minimum opening S1. At this time, the flow rate of the gaseous refrigerant separated in the separator is the smallest. After the second preset time period (for example, 1 minute), the value of T is detected and set as Ta. The opening of the refrigerant regulating device is adjusted according to the magnitude relationship between Ta and T0: if Ta > T0, it means that the evaporator is overheated at this time, and the evaporation pressure cannot be reduced through phase separation. At this time, the two refrigerant regulating devices are closed and the separation device is temporarily deactivated; if Ta < T0, at this time, the refrigerant in the evaporator is in a gas-phase mixed state, and the proportion of the gas phase in the refrigerant is relatively large. In order to avoid the influence of the gaseous refrigerant on the evaporation of the liquid refrigerant and effectively improve the heat exchange efficiency of the heat exchanger, it is necessary to increase the opening of the two refrigerant regulating devices to increase the amount of refrigerant that the separation device can receive and separate. The increase value of the opening of the two refrigerant regulating devices per minute can be 5 steps (5 steps is a preferred value, and the increase value of the opening can also be modified according to the actual application scenario, such as 3 steps, 6 steps, etc. This embodiment does not limit this). The value of T is detected 1 minute after each increase in the opening of the two refrigerant regulating devices. Let Si be the opening of the two refrigerant regulating devices at the i-th minute, and Ti be the T temperature value after the i-th minute. When i = k and Tk+1 > Tk, at this time T reaches the minimum value Tk, and the opening of the two refrigerant regulating devices is maintained at Sk. At this time, the system pressure reaches the lowest, the heat exchange effect is the best, and the dehumidification amount also reaches the limit.

[0069] This embodiment provides a refrigeration system that overcomes the problems of energy loss, increased cost, and additional space occupation caused by the poor dehumidification effect of existing air conditioners, which require the use of dehumidifiers. This embodiment improves the refrigeration system by proposing a system comprising: a four-way valve 10; a compression device 20, the input and output ends of which are respectively connected to the four-way valve 10; a condenser 30 connected to the four-way valve 10; an evaporator 40 connected to the four-way valve 10; a throttling device 50 connected to both the condenser 30 and the evaporator 40; and a separation device 60 connected to both the evaporator 40 and the four-way valve 10. When the refrigeration system activates dehumidification mode and the compression frequency of the compression device 20 and the temperature of the evaporator 40 meet preset conditions, the passage between the evaporator 40 and the separation device 60 is opened, allowing the mixed refrigerant flowing through the evaporator 40 to be diverted into the separation device 60 for phase separation. This embodiment enhances the dehumidification effect of the refrigeration system. The operating state of the separation device 60 is adjusted according to the operating frequency of the compressor 20 and the temperature of the evaporator 40 to reduce the evaporation pressure of the evaporator 40, thereby improving the heat exchange efficiency and dehumidification effect. Ultimate dehumidification can be achieved based solely on the refrigeration system, eliminating the need for additional dehumidifiers and saving costs for users.

[0070] Reference Figure 2 , Figure 2 This is a schematic diagram of the hardware structure involved in the operation of an embodiment of the present invention.

[0071] like Figure 2As shown, the hardware can be an air conditioner, which includes the refrigeration system described in the above embodiments, and further includes: a processor 1001, such as a central processing unit (CPU), a communication bus 1002, a user interface 1003, a network interface 1004, and a memory 1005. The communication bus 1002 is used to enable communication between these components. The user interface 1003 may include a display screen and an input unit such as a keyboard; optionally, the user interface 1003 may also include a standard wired interface or a wireless interface. The network interface 1004 may optionally include a standard wired interface or a wireless interface (such as a Wi-Fi interface). The memory 1005 may be a high-speed random access memory (RAM) or a stable non-volatile memory (NVM), such as a disk storage device. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0072] Those skilled in the art will understand that Figure 2 The structure shown does not constitute a limitation on the air conditioner and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0073] like Figure 2 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a data storage module, a network communication module, a user interface module, and a control program for a cooling system.

[0074] exist Figure 2 In the air conditioner shown, the network interface 1004 is mainly used for data communication with other devices; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the air conditioner of the present invention can be set in the air conditioner. The air conditioner calls the control program of the refrigeration system stored in the memory 1005 through the processor 1001 and executes the relevant steps of the control method of the refrigeration system in the following embodiments.

[0075] This invention also provides a control method for a refrigeration system, referring to... Figure 3 , Figure 3 This is a flowchart illustrating an embodiment of a control method for a refrigeration system according to the present invention. The control method for the refrigeration system is applied to the aforementioned refrigeration system and air conditioner.

[0076] In this embodiment, the control method of the refrigeration system includes:

[0077] Step S10: Dynamically monitor the operating mode of the refrigeration system;

[0078] It should be noted that in this embodiment, the executing entity is the processor in the air conditioner containing the aforementioned refrigeration system. The refrigeration system operates in two modes: a cooling mode and a dehumidification mode. In both modes, the condenser 30 acts as the condensing end, dissipating heat from the refrigerant, while the evaporator 40 acts as the evaporating end, absorbing heat from the refrigerant.

[0079] Understandably, when the refrigeration system is in refrigeration mode, the gaseous refrigerant discharged by the compressor 20 is transported to the condenser 30 through the four-way valve 10. After the heat dissipation and condensation process, it is transported to the throttling device for throttling, cooling and depressurization. After becoming low-pressure refrigerant, it enters the refrigerant pipeline of the evaporator 40 for heat absorption and evaporation. At this time, the first refrigerant regulating device 601 and the second refrigerant regulating device 602 are both closed, and the refrigerant directly returns to the compressor through the four-way valve 10 for compression, and the cycle repeats.

[0080] Step S20: When the refrigeration system is in dehumidification mode, dynamically detect the current operating frequency of the compressor in the compression device and the current temperature of the evaporator.

[0081] It should be noted that when the dehumidification mode of the refrigeration system is activated, the compressor operating frequency Fr and the current temperature T of the evaporator will be detected once every first preset time (e.g., 2 minutes) based on the frequency sensor set between the compressor 200 and the four-way valve 10 and the temperature sensor set in the flow path between the evaporator 40 and the phase separator 600.

[0082] Step S30: When the current operating frequency of the compressor reaches the preset frequency, the operating state of the separation device is changed according to the current temperature of the evaporator, so that the operating state of the separation device switches between the off state and the on state. When the operating state of the separation device is on, the mixed refrigerant from the evaporator enters the separation device for phase separation.

[0083] It should be noted that when the current operating frequency of compressor 200 is Fr = Ft (maximum target frequency, i.e., the preset frequency), the fan speed of the indoor fan is controlled to run at a strong wind, and the air conditioner set temperature is controlled at around 16 degrees Celsius (assuming that the dehumidification effect of the air conditioner is best at 16 degrees Celsius, but it is not limited to 16 degrees Celsius). At this time, the dehumidification capacity reaches its maximum. After the system runs stably, the value of T is recorded as T0. At this time, the first refrigerant regulating device 601 and the second refrigerant regulating device 602 are turned on to add the separation device 60 into the refrigerant circulation. At this time, both the first refrigerant regulating device 601 and the second refrigerant regulating device 602 are at the preset minimum opening S1. At this time, the flow rate of gaseous refrigerant separated in phase separator 600 is the minimum. The gaseous refrigerant compressed and discharged by the compression device 20 is transported to the condenser 30 through the four-way valve 10. After the heat dissipation and condensation process, it is transported to the throttling device 50 for throttling, cooling and depressurization. After becoming low-pressure refrigerant, it enters the refrigerant pipeline of evaporator 40 for heat absorption and evaporation. Part of it flows into evaporator 40. The refrigerant enters the phase separator 600 through the branching path between the phase separator 600 and the evaporator 40 for phase separation. The separated gaseous phase directly enters the return pipe through the first refrigerant regulating device 601 and then enters the compressor 200 through the liquid storage tank 201. The separated liquid phase flows back into the evaporator 40 through the second refrigerant regulating device 602, and after absorbing heat and evaporating again, it is converted into gaseous refrigerant. Then, it enters the compressor 200 through the liquid storage tank 201 for compression. This cycle repeats, reducing the evaporation pressure of the evaporator 40, thereby improving the heat exchange efficiency and dehumidification effect. It can achieve the effect of extreme dehumidification, eliminating the need to add a dehumidifier and saving costs for users.

[0084] As an example, in this embodiment, step S30, which involves changing the operating state of the separation device 60 based on the current temperature of the evaporator 40, includes: when the current temperature of the evaporator 40 is less than a preset stable temperature threshold, activating the first refrigerant regulating device 601 in the separation device 60, so that the phase separator 600 separates the mixed refrigerant from the evaporator 40 to obtain gaseous refrigerant, which is then output to the compression device 20. Preferably, temperature detection is performed on the middle section of the evaporator 40.

[0085] As an example, in this embodiment, the step of changing the operating state of the separation device 60 according to the current temperature of the evaporator 40 in step S30 further includes: when the current temperature of the evaporator 40 is less than a preset stable temperature threshold, turning on the second refrigerant regulating device 602 in the separation device 60, so that the phase separator 600 separates the mixed refrigerant from the evaporator 40 to obtain liquid refrigerant and outputs it to the evaporator 40.

[0086] It should be noted that the preset stable temperature threshold is T0. In this embodiment, after the air conditioner has been running stably for the second preset duration (e.g., 1 minute), the T value will be detected again and set as Ta. The opening degree of the refrigerant regulating device is dynamically adjusted according to the magnitude relationship between Ta and T0: If Ta < T0, at this time, the refrigerant in the evaporator 40 is in a gaseous mixed state, and the proportion of the gas phase in the refrigerant is relatively large. In order to avoid the influence of gaseous refrigerant on the evaporation of liquid refrigerant and effectively improve the heat exchange efficiency of the heat exchanger, the opening degrees of the two refrigerant regulating devices are gradually increased. The increase value per minute can be 5 steps (5 steps is a preferred value, and the increase value of the opening degree can also be modified according to the actual application scenario, such as 3 steps, 6 steps, etc. This embodiment does not limit this). The T value is detected 1 minute after the opening degree of the two refrigerant regulating devices is increased each time.

[0087] As an example, in this embodiment, the step of changing the operating state of the separation device 60 according to the current temperature of the evaporator 40 in step S30 further includes: gradually increasing the opening degrees of the first refrigerant regulating device 601 and the second refrigerant regulating device 602 until the current temperature of the evaporator 40 is greater than the temperature at the previous moment, and then adjusting the opening degrees of the first refrigerant regulating device 601 and the second refrigerant regulating device 602 to the opening degrees at the previous moment.

[0088] It should be noted that in this embodiment, Si is set as the opening degree of the first refrigerant regulating device 601 and the second refrigerant regulating device 602 at the i-th minute, and Ti is the T temperature value after the i-th minute. When i = k and Tk+1 > Tk, at this time, T reaches the minimum value Tk, and the opening degrees of the first refrigerant regulating device 601 and the second refrigerant regulating device 602 are maintained at Sk. At this time, the system pressure reaches the lowest, the heat exchange effect is the best, and the dehumidification amount also reaches the limit.

[0089] As an example, in this embodiment, the step of changing the operating state of the separation device 60 according to the current temperature of the evaporator 40 in step S30 further includes: when the current temperature of the evaporator 40 is greater than the preset stable temperature threshold, closing the first refrigerant regulating device 601 and the second refrigerant regulating device 602.

[0090] It can be understood that if Ta > T0, it means that the evaporator 40 is overheated at this time. The evaporator 40 has the ability to completely evaporate the refrigerant passing through the evaporator 40, and the evaporation pressure cannot be reduced through phase separation. At this time, it is necessary to close the two refrigerant regulating devices and temporarily deactivate the separation device 60, so that the refrigeration system performs the same heat exchange cycle as in the refrigeration mode.

[0091] Furthermore, if the current temperature of the evaporator 40 is equal to the preset stable temperature threshold, i.e., Ta = T0, then there is no need to change the operating state of the separation device 60; if the operating state of the separation device 60 was on at the previous moment, then the separation device 60 remains on at the current moment; if the operating state of the separation device 60 was off at the previous moment, then the separation device 60 remains off at the current moment.

[0092] This embodiment provides a control method for a refrigeration system, overcoming the problems of energy loss, increased cost, and additional space occupation caused by the need for dehumidifiers due to the poor dehumidification effect of air conditioners in the prior art. This embodiment proposes a control method for a refrigeration system based on the above-mentioned refrigeration system, including the following steps: dynamically monitoring the operating mode of the refrigeration system; when the operating mode of the refrigeration system is dehumidification mode, dynamically detecting the current operating frequency of the compressor 200 in the compression device 20 and the current temperature of the evaporator 40; when the current operating frequency reaches a preset frequency, changing the operating state of the separation device 60 according to the current temperature of the evaporator 40, so that the operating state of the separation device 60 switches between a closed state and an open state; when the operating state of the separation device 60 is in the open state, the mixed refrigerant from the evaporator 40 enters the separation device 60 for phase separation. This embodiment enhances the dehumidification effect of the refrigeration system. The operating state of the separation device 60 is adjusted according to the operating frequency of the compressor 20 and the temperature of the evaporator 40 to reduce the evaporation pressure of the evaporator 40, thereby improving the heat exchange efficiency and dehumidification effect. Ultimate dehumidification can be achieved based solely on the refrigeration system, eliminating the need for an additional dehumidifier and saving costs for users.

[0093] Furthermore, embodiments of the present invention also propose a computer-readable storage medium storing a control program for a refrigeration system, wherein the control program for the refrigeration system is executed by a processor using the relevant steps of any embodiment of the above-described refrigeration system control method.

[0094] It should be noted that, in this document, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or system. Unless otherwise specified, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or system that includes that element.

[0095] The sequence numbers of the above embodiments of the present invention are for descriptive purposes only and do not represent the superiority or inferiority of the embodiments.

[0096] Through the above description of the embodiments, those skilled in the art can clearly understand that the methods of the above embodiments can be implemented by means of software plus necessary general-purpose hardware platforms. Of course, they can also be implemented by hardware, but in many cases the former is a better implementation method. Based on this understanding, the technical solution of the present invention, in essence, or the part that contributes to the prior art, can be embodied in the form of a software product. The air conditioner and the software product are stored in a storage medium (such as ROM / RAM, magnetic disk, optical disk) as described above, including several instructions to cause a terminal device (which may be a mobile phone, an air conditioner, a server, or a network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0097] The above are merely preferred embodiments of the present invention and do not limit the scope of the patent. Any equivalent structural or procedural transformations made based on the description and drawings of the present invention, or direct or indirect applications in other related technical fields, are similarly included within the scope of patent protection of the present invention.

Claims

1. A refrigeration system characterized by, The refrigeration system comprises: a four-way valve, comprising a first port, a second port, a third port and a fourth port, the first port and the second port being in communication, the third port and the fourth port being in communication; a compression device, the input end and the output end of the compression device being in communication with the first port and the third port of the four-way valve respectively; a condenser, the condenser being in communication with the fourth port of the four-way valve; an evaporator, the evaporator being in communication with the second port of the four-way valve; a throttling device, the throttling device being in communication with the condenser and the evaporator respectively; a separation device, the separation device being in communication with the evaporator and the second port of the four-way valve, the separation device being used for separating mixed refrigerant from the evaporator; the separation device comprises: a phase separator, a shunt passage and a return passage being provided between the phase separator and the evaporator; wherein the inlet of the shunt passage is connected with the evaporator, the outlet of the shunt passage is connected with the phase separator, the shunt passage is used for shunting the mixed refrigerant in the evaporator to the phase separator; the inlet of the return passage is connected with the phase separator, the outlet of the return passage is connected with the evaporator, the return passage is used for outputting the liquid-phase refrigerant from the phase separator to the evaporator; a first refrigerant adjusting device, the first refrigerant adjusting device being provided between the phase separator and the four-way valve; a second refrigerant adjusting device, the second refrigerant adjusting device being provided on the return passage; when the refrigeration system starts the dehumidification mode and the compression frequency of the compression device and the temperature of the evaporator satisfy the preset condition, the passage between the evaporator and the separation device is conducted to make the mixed refrigerant flowing through the evaporator shunt into the separation device for phase separation.

2. The refrigeration system of claim 1 wherein, The compression device comprises: a compressor, the output end of the compressor being in communication with the third port of the four-way valve; a liquid storage tank, the input end of the liquid storage tank being in communication with the first port of the four-way valve, the output end of the liquid storage tank being in communication with the input end of the compressor.

3. The refrigeration system of claim 1 wherein, The throttling device comprises: an outdoor electric control, the outdoor electric control being used for controlling the refrigeration system; a first throttling component, the first throttling component being in communication with the condenser and the outdoor electric control; a second throttling component, the second throttling component being in communication with the evaporator and the outdoor electric control.

4. A control method of a refrigeration system, characterized by, The control method of the refrigeration system is applied to the refrigeration system as claimed in any one of claims 1-3, and the control method of the refrigeration system comprises the following steps: dynamically monitoring the operation mode of the refrigeration system; when the operation mode of the refrigeration system is the dehumidification mode, dynamically detecting the current operation frequency of the compressor in the compression device and the current temperature of the evaporator; When the current operating frequency of the compressor reaches a preset frequency, the operating state of the separation device is changed according to the current temperature of the evaporator, so that the operating state of the separation device is switched between the closed state and the open state, and when the operating state of the separation device is in the open state, the mixed refrigerant from the evaporator enters the separation device for phase separation.

5. The control method of a refrigeration system according to claim 4, characterized by, The step of changing the operating state of the separation device according to the current temperature of the evaporator comprises: When the current temperature of the evaporator is less than a preset stable temperature threshold, the first refrigerant adjusting device in the separation device is opened, so that the phase separator separates the mixed refrigerant from the evaporator to obtain a gas-phase refrigerant and outputs it to the compression device.

6. The control method of a refrigeration system according to claim 5, characterized by, The step of changing the operating state of the separation device according to the current temperature of the evaporator further comprises: When the current temperature of the evaporator is less than a preset stable temperature threshold, the second refrigerant adjusting device in the separation device is opened, so that the phase separator separates the mixed refrigerant from the evaporator to obtain a liquid-phase refrigerant and outputs it to the evaporator.

7. The control method of a refrigeration system according to claim 6, characterized by, The step of changing the operating state of the separation device according to the current temperature of the evaporator further comprises: The opening degrees of the first refrigerant adjusting device and the second refrigerant adjusting device are gradually increased, and when the current temperature of the evaporator is greater than the temperature at the previous time, the opening degrees of the first refrigerant adjusting device and the second refrigerant adjusting device are adjusted to the opening degrees at the previous time.

8. The control method of a refrigeration system according to claim 6, characterized by, The step of changing the operating state of the separation device according to the current temperature of the evaporator further comprises: When the current temperature of the evaporator is greater than a preset stable temperature threshold, the first refrigerant adjusting device and the second refrigerant adjusting device in the separation device are closed.

9. An air conditioner characterized by comprising: The air conditioner comprises the refrigeration system, a memory, a processor and a control program of the refrigeration system stored on the memory and executable on the processor, and the control program of the refrigeration system is executed by the processor to implement the steps of the control method of the refrigeration system according to any one of claims 4 to 8.

10. A computer-readable storage medium, characterized in that, The computer readable storage medium stores the control program of the refrigeration system, and the control program of the refrigeration system is executed by the processor to implement the steps of the control method of the refrigeration system according to any one of claims 4 to 8.

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