Air conditioning system control method and device, air conditioning system and storage medium

Abstract

The application discloses an air conditioner system control method and device, an air conditioner system and a storage medium, and belongs to the technical field of air conditioners. The application adjusts the communication state of the four-way valve assembly when the air conditioner system is in a defrosting mode, stores refrigerant between the evaporator electronic expansion valve of the air conditioner indoor unit and the four-way valve assembly, acquires detection temperature information of the compressor and saturation temperature information of the compressor, and adjusts the output power of the refrigerant heating assembly according to the detection temperature information and the saturation temperature information. In this way, the storage position of the refrigerant is adjusted through the four-way valve assembly, the temperature of the refrigerant is balanced through the adjustment of the output power of the refrigerant heating assembly, so that the temperature of the refrigerant is ensured after defrosting, and the heating efficiency after defrosting is improved.

Description

Technical Field

[0001] This invention relates to the field of air conditioner technology, and in particular to an air conditioning system control method, device, air conditioning system, and storage medium. Background Technology

[0002] In existing heat pump air conditioning inverter systems, the unit switches to cooling mode for defrosting during low-temperature heating operation to ensure the heat exchanger's heat exchange efficiency. The defrosting heat comes from the compressor and the liquid heat absorbed by the indoor evaporator. However, during defrosting, a large amount of low-temperature, low-pressure liquid refrigerant is stored in the evaporator and gas-side piping. After defrosting, the refrigerant heat entering the evaporator needs to be increased again. This process results in slow heating after defrosting, leading to large fluctuations in room temperature each time defrosting occurs.

[0003] In existing technical solutions, to reduce the impact of defrosting on user experience, there are similar approaches, such as external heat storage modules, defrosting with reduced defrosting frequency to increase the inlet temperature of the outdoor unit's heat exchanger, and bypass defrosting. Among existing solutions, external heat storage modules are complex, costly, and require reserved installation space; while reduced defrosting frequency allows for continuous heating, it may not defrost completely in sub-zero temperatures, affecting subsequent performance; and bypass defrosting is time-consuming and frequent, significantly impacting heating efficiency.

[0004] The above content is only used to help understand the technical solution of the present invention and does not represent an admission that the above content is prior art. Summary of the Invention

[0005] The main objective of this invention is to provide an air conditioning system control method, device, air conditioning system, and storage medium, aiming to solve the technical problem of slow heating effect after defrosting in existing heat pump air conditioners.

[0006] To achieve the above objectives, the present invention provides an air conditioning system control method, which is applied to an air conditioning system. The air conditioning system includes a four-way valve assembly, a refrigerant heating assembly, an outdoor air conditioning unit, and an indoor air conditioning unit. The refrigerant heating assembly is connected to the compressor of the outdoor air conditioning unit, and the four-way valve assembly is connected to both the outdoor air conditioning unit and the indoor air conditioning unit.

[0007] The air conditioning system control method includes:

[0008] When the air conditioning system is in defrost mode, the connection state of the four-way valve assembly is adjusted to store refrigerant between the evaporator electronic expansion valve of the indoor unit of the air conditioner and the four-way valve assembly;

[0009] Obtain the detection temperature information and the saturation temperature information of the compressor;

[0010] The output power of the refrigerant heating component is adjusted based on the detected temperature information and the saturation temperature information.

[0011] Optionally, the air conditioning system includes a first four-way valve and a second four-way valve, wherein the first four-way valve is connected to the outdoor unit of the air conditioner and the compressor respectively, and the second four-way valve is connected to the indoor unit of the air conditioner and the first four-way valve respectively;

[0012] When the air conditioning system is in defrost mode, adjusting the connection state of the four-way valve assembly includes:

[0013] When the air conditioning system is in defrost mode, the power supply to the first four-way valve is turned on, the power supply to the second four-way valve is turned off, the refrigerant heating component is turned on, the evaporator electronic expansion valve of the indoor unit and the fan of the indoor unit are turned off, and the refrigerant is stored between the evaporator electronic expansion valve and the four-way valve component of the indoor unit.

[0014] Optionally, adjusting the output power of the refrigerant heating component based on the detected temperature information and the saturation temperature information includes:

[0015] The inhalation detection temperature and the exhaust detection temperature are determined based on the detected temperature information.

[0016] The low-pressure saturation temperature and the high-pressure saturation temperature are determined based on the saturation temperature information.

[0017] The output power of the refrigerant heating component is adjusted according to the intake detection temperature, the exhaust detection temperature, the low-pressure saturation temperature, and the high-pressure saturation temperature.

[0018] Optionally, adjusting the output power of the refrigerant heating component based on the intake detection temperature, the exhaust detection temperature, the low-pressure saturation temperature, and the high-pressure saturation temperature includes:

[0019] The intake superheat is determined based on the intake detection temperature and the low-pressure saturation temperature.

[0020] The exhaust superheat is determined based on the exhaust detection temperature and the high-pressure saturation temperature.

[0021] The output power of the refrigerant heating component is adjusted according to the intake superheat and the exhaust superheat.

[0022] Optionally, adjusting the output power of the refrigerant heating assembly based on the intake superheat and the exhaust superheat includes:

[0023] When the intake superheat is less than the first threshold, the output power of the refrigerant heating component is increased to the first output power;

[0024] When the intake superheat is greater than or equal to the first threshold and less than the second threshold, the output power of the refrigerant heating component is adjusted according to the exhaust superheat.

[0025] When the intake superheat is greater than the second threshold, the output power of the refrigerant heating component is not adjusted.

[0026] Optionally, adjusting the output power of the refrigerant heating component according to the exhaust superheat when the intake superheat is greater than or equal to the first threshold and less than the second threshold includes:

[0027] When the intake superheat is greater than or equal to the first threshold and less than the second threshold, if the exhaust superheat is greater than the third threshold, the output power of the refrigerant heating component will not be adjusted.

[0028] When the intake superheat is greater than or equal to the first threshold and less than the second threshold, if the exhaust superheat is less than or equal to the third threshold, the output power of the refrigerant heating component is adjusted to the second output power.

[0029] Optionally, after adjusting the output power of the refrigerant heating component based on the intake superheat and the exhaust superheat, the method further includes:

[0030] When the output power of the refrigerant heating component and the suction superheat meet the frequency reduction conditions, the defrosting frequency of the compressor is reduced to the target frequency.

[0031] When the target frequency is the preset minimum frequency and the intake superheat meets the frequency reduction condition, the air conditioning system is switched to cooling mode for defrosting.

[0032] Furthermore, to achieve the above objectives, the present invention also proposes an air conditioning system control device, the air conditioning system control device comprising:

[0033] The connection adjustment module is used to adjust the connection state of the four-way valve assembly when the air conditioning system is in defrost mode, so as to store refrigerant between the evaporator electronic expansion valve of the air conditioning indoor unit and the four-way valve assembly.

[0034] The data acquisition module is used to acquire the detection temperature information and the saturation temperature information of the compressor.

[0035] A power adjustment module is used to adjust the output power of the refrigerant heating component based on the detected temperature information and the saturation temperature information.

[0036] Furthermore, to achieve the above objectives, the present invention also proposes an air conditioning system, the air conditioning system comprising: a memory, a processor, and an air conditioning system control program stored in the memory and running on the processor, the air conditioning system control program being configured to implement the air conditioning system control method as described above.

[0037] In addition, to achieve the above objectives, the present invention also proposes a storage medium storing an air conditioning system control program, which, when executed by a processor, implements the air conditioning system control method as described above.

[0038] This invention, when the air conditioning system is in defrost mode, adjusts the connection state of the four-way valve assembly to store refrigerant between the evaporator electronic expansion valve of the indoor unit and the four-way valve assembly; acquires the compressor's detected temperature information and saturation temperature information; and adjusts the output power of the refrigerant heating assembly based on the detected temperature information and the saturation temperature information. In this way, the refrigerant storage position is adjusted via the four-way valve assembly, and the refrigerant temperature is balanced by adjusting the output power of the refrigerant heating assembly, thereby ensuring the refrigerant temperature is maintained after defrosting and improving heating efficiency after defrosting. Attached Figure Description

[0039] Figure 1 This is a schematic diagram of the structure of an air conditioning system for the hardware operating environment involved in the embodiments of the present invention;

[0040] Figure 2 This is a flowchart illustrating the first embodiment of the air conditioning system control method of the present invention;

[0041] Figure 3 This is a schematic diagram of the system structure in one embodiment of the air conditioning system control method of the present invention;

[0042] Figure 4 This is a flowchart illustrating the second embodiment of the air conditioning system control method of the present invention;

[0043] Figure 5 This is a flowchart illustrating the third embodiment of the air conditioning system control method of the present invention;

[0044] Figure 6 This is a structural block diagram of the first embodiment of the air conditioning system control device of the present invention.

[0045] 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

[0046] It should be understood that the specific embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the invention.

[0047] Reference Figure 1 , Figure 1 This is a schematic diagram of the air conditioning system structure of the hardware operating environment involved in the embodiments of the present invention.

[0048] like Figure 1 As shown, the air conditioning system may include: 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 Wireless-Fidelity (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 drive. The memory 1005 may also optionally be a storage device independent of the aforementioned processor 1001.

[0049] Those skilled in the art will understand that Figure 1 The structure shown does not constitute a limitation on the air conditioning system and may include more or fewer components than shown, or combine certain components, or have different component arrangements.

[0050] like Figure 1 As shown, the memory 1005, which serves as a storage medium, may include an operating system, a network communication module, a user interface module, and an air conditioning system control program.

[0051] exist Figure 1 In the air conditioning system shown, the network interface 1004 is mainly used for data communication with the network server; the user interface 1003 is mainly used for data interaction with the user; the processor 1001 and the memory 1005 in the air conditioning system of the present invention can be set in the air conditioning system, and the air conditioning system calls the air conditioning system control program stored in the memory 1005 through the processor 1001 and executes the air conditioning system control method provided in the embodiment of the present invention.

[0052] This invention provides an air conditioning system control method, referring to... Figure 2 , Figure 2 This is a flowchart illustrating the first embodiment of an air conditioning system control method according to the present invention.

[0053] In this embodiment, the air conditioning system control method includes the following steps:

[0054] Step S10: When the air conditioning system is in defrost mode, adjust the connection state of the four-way valve assembly to store refrigerant between the evaporator electronic expansion valve of the indoor unit of the air conditioner and the four-way valve assembly.

[0055] In this embodiment, the executing entity can be the air conditioning system, which has functions such as data processing, data communication, and program execution. Of course, other devices with similar functions can also be used, and this embodiment does not impose any limitations on this. For ease of explanation, this embodiment uses an air conditioning system as an example.

[0056] It should be noted that, as Figure 3 The system structure diagram shown illustrates a proposed air conditioning system that adds a four-way valve assembly and a refrigerant heating assembly to the existing air conditioner system structure. By switching the refrigerant flow direction through dual four-way valves, it ensures rapid defrosting while also improving the rapid heating effect after defrosting. Simultaneously, it prevents the compressor from operating with liquid or overheating, effectively protecting the compressor's reliable operation. Figure 3 In the structure shown, the four-way valve assembly includes a first four-way valve and a second four-way valve, namely four-way valve 1 and four-way valve 2 in the figure. In different modes of the air conditioning system, the first four-way valve and the second four-way valve correspond to different power-on states, thereby changing the conduction and connection relationship of their respective four nodes. For example: in cooling mode, the first four-way valve is de-energized (DC connected, ES connected), and the second four-way valve is de-energized (DC connected, ES connected); in heating mode, the first four-way valve is energized (DE connected, CS connected), and the second four-way valve is de-energized (DC connected, ES connected); during defrosting, the first four-way valve is de-energized (DC connected, ES connected), and the second four-way valve is energized (DE connected, CS connected).

[0057] In practical implementation, existing air conditioning systems using external heat storage modules are complex, costly, and require reserved installation space. While thin-frost defrosting with reduced frequency can achieve continuous heating, it may not defrost completely in sub-zero temperatures, affecting subsequent performance. Bypass defrosting is time-consuming and frequent, significantly impacting heating efficiency. This solution proposes an air conditioning system that adds a four-way valve assembly and a refrigerant heating assembly. By switching the refrigerant flow through dual four-way valves, it ensures rapid defrosting while improving rapid heating after defrosting. Simultaneously, it prevents the compressor from operating with liquid or overheating, effectively protecting the compressor's reliable operation. Compared to external heat storage devices for defrosting, the refrigerant heating system in this embodiment offers faster heating speed and stepless output adjustment, preventing the compressor from operating with liquid or overheating, effectively protecting its reliable operation. Compared to external heat storage devices, the refrigerant heating system requires less space and is less expensive, needing only a four-way valve, refrigerant heating device, and related circuit ports for control; it is factory-installed and requires no additional installation. Compared to bypass defrosting control, the refrigerant heating system uses an additional heat source for rapid defrosting, avoiding impact on heating performance. Compared to traditional cooling-based defrosting, the refrigerant heating system quickly improves post-defrosting heating performance, preventing excessive room temperature fluctuations during defrosting that could lead to a poor user experience.

[0058] It should be understood that when the air conditioning system is detected to be in defrost mode, the connection status of the four-way valve assembly is adjusted to accurately control the refrigerant storage location. The refrigerant is stored in the passage between the evaporator electronic expansion valve and the four-way valve assembly in the indoor unit of the air conditioner, so that the refrigerant is kept at high temperature and high pressure, resulting in better and faster heating effect when it is turned on later.

[0059] Step S20: Obtain the detection temperature information of the compressor and the saturation temperature information of the compressor.

[0060] In practice, the compressor's temperature detection information includes, but is not limited to, intake temperature and exhaust temperature, and the saturation temperature information includes, but is not limited to, low-pressure saturation temperature and high-pressure saturation temperature.

[0061] Step S30: Adjust the output power of the refrigerant heating component according to the detected temperature information and the saturation temperature information.

[0062] It should be noted that after determining the detection temperature and saturation temperature information, the intake superheat and exhaust superheat are first calculated, and then the adjustment strategy for the output power of the refrigerant heating component is determined based on the values ​​of intake superheat and exhaust superheat.

[0063] In this embodiment, the storage position of the refrigerant is adjusted by a four-way valve assembly, and the temperature of the refrigerant is balanced by adjusting the output power of the refrigerant heating assembly, thereby ensuring the temperature of the refrigerant after defrosting and improving the heating efficiency after defrosting.

[0064] refer to Figure 4 , Figure 4 This is a flowchart illustrating a second embodiment of an air conditioning system control method according to the present invention.

[0065] Based on the first embodiment described above, the air conditioning system of this embodiment includes a first four-way valve and a second four-way valve. The first four-way valve is connected to the outdoor unit of the air conditioner and the compressor, respectively, and the second four-way valve is connected to the indoor unit of the air conditioner and the first four-way valve, respectively.

[0066] Step S10 includes:

[0067] Step S101: When the air conditioning system is in defrost mode, turn on the power to the first four-way valve, turn off the power to the second four-way valve, turn on the refrigerant heating assembly, turn off the evaporator electronic expansion valve of the air conditioning indoor unit and the fan of the air conditioning indoor unit, and store the refrigerant between the evaporator electronic expansion valve of the air conditioning indoor unit and the four-way valve assembly.

[0068] It should be noted that, as Figure 3 As shown, the four-way valve assembly includes two four-way valves, namely a first four-way valve and a second four-way valve. The first four-way valve is located between the outdoor unit of the air conditioner and the compressor, and the second four-way valve is located between the indoor unit of the air conditioner and the first four-way valve.

[0069] It should be understood that in cooling mode, the first four-way valve is de-energized (DC connected, ES connected), and the second four-way valve is de-energized (DC connected, ES connected); in heating mode, the first four-way valve is energized (DE connected, CS connected), and the second four-way valve is de-energized (DC connected, ES connected); during defrosting, the first four-way valve is de-energized (DC connected, ES connected), and the second four-way valve is energized (DE connected, CS connected); during heating, the refrigerant from the S end of the second four-way valve to the indoor unit evaporator is a high-temperature, high-pressure refrigerant.

[0070] In practice, when the unit detects the need to enter defrost control, it enters defrost control via the refrigerant heating device. The first four-way valve is de-energized (DC connected, ES connected), and the second four-way valve is energized (DE connected, CS connected). At this time, the refrigerant heating device is activated, and the defrosting heat from the outdoor unit's heat exchanger is provided by the compressor and the refrigerant heating device for rapid defrosting. The indoor unit's electronic expansion valve closes, and the indoor fan stops. At this point, high-temperature, high-pressure refrigerant is stored between the S-end of the second four-way valve and the electronic expansion valve of the indoor unit's evaporator. After defrosting, because a large amount of high-temperature, high-pressure refrigerant is stored between the S-end of the second four-way valve and the indoor unit's evaporator, the indoor unit's anti-cold air control exits quickly, and the compressor rapidly increases its frequency after defrosting, resulting in rapid unit heating.

[0071] This embodiment avoids storing low-temperature liquid refrigerant during evaporator defrosting, and requires a long time to establish high temperature and high pressure to achieve rapid heating effect.

[0072] refer to Figure 5 , Figure 5 This is a flowchart illustrating a third embodiment of an air conditioning system control method according to the present invention.

[0073] Based on the first embodiment described above, the air conditioning system control method of this embodiment includes the following in step S30:

[0074] Step S301: Determine the intake detection temperature and exhaust detection temperature based on the detected temperature information.

[0075] It should be noted that the intake detection temperature refers to the temperature Th1 detected by the compressor intake temperature sensor, and the exhaust detection temperature refers to the temperature Tp1 detected by the compressor exhaust temperature sensor.

[0076] Step S302: Determine the low-pressure saturation temperature and the high-pressure saturation temperature based on the saturation temperature information.

[0077] It should be understood that the low-pressure saturation temperature refers to the saturation temperature Tho corresponding to the pressure detected by the compressor's low-pressure pressure sensor, while the high-pressure saturation temperature refers to the saturation temperature Tp0 corresponding to the pressure detected by the compressor's high-pressure pressure sensor.

[0078] In specific implementation, the output power of the refrigerant heating device is set to P, the initial output power of the refrigerant heating device is Po, the minimum adjustable output power of the refrigerant heating device is Pmin, the minimum adjustable output power of the refrigerant heating device is Pmax, and the preset defrosting frequency of the compressor is Fr.

[0079] Step S303: Adjust the output power of the refrigerant heating component according to the intake detection temperature, the exhaust detection temperature, the low-pressure saturation temperature and the high-pressure saturation temperature.

[0080] In practice, the intake and exhaust superheats are first calculated based on the intake and exhaust detection temperatures, combined with the low-pressure and high-pressure saturation temperatures. Finally, the output power is calculated based on the intake and exhaust superheats. Specifically, the intake superheat is (Th1 - Tho), and the exhaust superheat is (Tp1 - Tp0).

[0081] Furthermore, the intake superheat is first calculated based on the intake detection temperature and the low-pressure saturation temperature, and then the exhaust superheat is calculated based on the exhaust detection temperature and the high-pressure saturation temperature. Finally, the output power of the refrigerant heating component is determined based on the values ​​of the intake superheat and the exhaust superheat.

[0082] It should be noted that, firstly, the intake superheat is compared with a first threshold. When the intake superheat is less than the first threshold, the output power of the refrigerant heating component is increased to the first output power. Specifically, when Th1-Tho < A, then P = α*Po, and the output power of the refrigerant heating device is increased to heat the refrigerant to ensure the system's intake superheat. Here, A is the first threshold, which can be any pre-set threshold; this embodiment does not limit this. α*Po at this time is the first output power, and α can be any fixed parameter or any value; this embodiment does not limit this either.

[0083] It should be understood that when A≤Th1-Tho<B, the value of exhaust superheat is then determined to determine the output power, where B is the second threshold, which can be any pre-set threshold, and this embodiment does not limit it.

[0084] In practice, when Th1-Tho>B, P remains unchanged to prevent excessive output of the refrigerant heating device from causing excessive suction, which would affect the cooling of the compressor coil and lead to overheating of the compressor.

[0085] In this way, the value based on the intake superheat is compared with the first threshold and the second threshold, thereby interfering with the determination of the output power of the refrigerant heating component.

[0086] Furthermore, when the intake superheat is greater than or equal to the first threshold and less than the second threshold, the exhaust superheat is compared with the third threshold to determine the calculation method for the output power. Specifically, if Tp1 - Tp0 > K, the output of the refrigerant heating device is maintained to prevent excessive output from causing the compressor to overheat; if Tp1 - Tp0 ≤ K, then P = β*P, and the output of the refrigerant heating device is increased to minimize defrosting time and improve comfort while ensuring that the compressor does not overheat. Here, K is the third threshold, which can be any pre-set threshold, and this embodiment does not limit it. β*P at this time is the first output power, and β can be any fixed parameter or any value, and this embodiment does not limit it.

[0087] It should be understood that, generally, the value of A is in the range of 1~3℃, the value of B is in the range of 10~15℃, the value of K is in the range of 25~30℃, α and β are both constants greater than 1, and α>β, θ is a constant less than 1, and the adjustment range of P is {Pmin,Pmax}.

[0088] In this way, the output power of the refrigerant heating component can be determined based on both intake superheat and exhaust superheat.

[0089] Furthermore, to adapt the defrosting operation to special circumstances, when the output power and suction superheat meet the frequency reduction condition, the defrosting frequency is reduced to the target frequency. The frequency reduction condition is: when P is detected to be outputting at Pmax, Th1-Tho < A duration T. T can be any time length, and this embodiment does not limit it. In this case, it is considered that the maximum output of the refrigerant heating device still does not meet the compressor superheat requirement, so the refrigerant circulation volume is reduced by decreasing the defrosting frequency, resulting in Fr = θ*Fr.

[0090] It should be noted that when the target frequency is the preset minimum frequency, and the suction superheat meets the frequency reduction condition, the air conditioning system will switch to cooling mode and perform defrosting. If Th1-Tho≥A is still not satisfied when Fr=Frmin, the defrosting control of the refrigerant heating device will be exited, the first four-way valve will be de-energized (DC connected, ES connected), the second four-way valve will be de-energized (DC connected, ES connected), and the system will switch to cooling mode for defrosting.

[0091] This embodiment accurately determines the output power of the refrigerant heating component by combining the intake and exhaust temperatures from the temperature detection information with the low-pressure and high-pressure saturation temperatures from the saturation temperature information, and finally comparing them with the first, second, and third thresholds.

[0092] Furthermore, this embodiment of the invention also proposes a storage medium storing an air conditioning system control program, which, when executed by a processor, implements the steps of the air conditioning system control method described above.

[0093] Since this storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be repeated here.

[0094] Reference Figure 5 , Figure 5 This is a structural block diagram of the first embodiment of the air conditioning system control device of the present invention.

[0095] like Figure 5As shown, the air conditioning system control device proposed in this embodiment of the invention includes:

[0096] The connection adjustment module 10 is used to adjust the connection state of the four-way valve assembly when the air conditioning system is in defrost mode, so as to store refrigerant between the evaporator electronic expansion valve of the indoor unit of the air conditioner and the four-way valve assembly.

[0097] In this embodiment, the executing entity can be the air conditioning system, which has functions such as data processing, data communication, and program execution. Of course, other devices with similar functions can also be used, and this embodiment does not impose any limitations on this. For ease of explanation, this embodiment uses an air conditioning system as an example.

[0098] It should be noted that, as Figure 3 The system structure diagram shown illustrates a proposed air conditioning system that adds a four-way valve assembly and a refrigerant heating assembly to the existing air conditioner system structure. By switching the refrigerant flow direction through dual four-way valves, it ensures rapid defrosting while also improving the rapid heating effect after defrosting. Simultaneously, it prevents the compressor from operating with liquid or overheating, effectively protecting the compressor's reliable operation. Figure 3 In the structure shown, the four-way valve assembly includes a first four-way valve and a second four-way valve, namely four-way valve 1 and four-way valve 2 in the figure. In different modes of the air conditioning system, the first four-way valve and the second four-way valve correspond to different power-on states, thereby changing the conduction and connection relationship of their respective four nodes. For example: in cooling mode, the first four-way valve is de-energized (DC connected, ES connected), and the second four-way valve is de-energized (DC connected, ES connected); in heating mode, the first four-way valve is energized (DE connected, CS connected), and the second four-way valve is de-energized (DC connected, ES connected); during defrosting, the first four-way valve is de-energized (DC connected, ES connected), and the second four-way valve is energized (DE connected, CS connected).

[0099] In practical implementation, existing air conditioning systems using external heat storage modules are complex, costly, and require reserved installation space. While thin-frost defrosting with reduced frequency can achieve continuous heating, it may not defrost completely in sub-zero temperatures, affecting subsequent performance. Bypass defrosting is time-consuming and frequent, significantly impacting heating efficiency. This solution proposes an air conditioning system that adds a four-way valve assembly and a refrigerant heating assembly. By switching the refrigerant flow through dual four-way valves, it ensures rapid defrosting while improving rapid heating after defrosting. Simultaneously, it prevents the compressor from operating with liquid or overheating, effectively protecting the compressor's reliable operation. Compared to external heat storage devices for defrosting, the refrigerant heating system in this embodiment offers faster heating speed and stepless output adjustment, preventing the compressor from operating with liquid or overheating, effectively protecting its reliable operation. Compared to external heat storage devices, the refrigerant heating system requires less space and is less expensive, needing only a four-way valve, refrigerant heating device, and related circuit ports for control; it is factory-installed and requires no additional installation. Compared to bypass defrosting control, the refrigerant heating system uses an additional heat source for rapid defrosting, avoiding impact on heating performance. Compared to traditional cooling-based defrosting, the refrigerant heating system quickly improves post-defrosting heating performance, preventing excessive room temperature fluctuations during defrosting that could lead to a poor user experience.

[0100] It should be understood that when the air conditioning system is detected to be in defrost mode, the connection status of the four-way valve assembly is adjusted to accurately control the refrigerant storage location. The refrigerant is stored in the passage between the evaporator electronic expansion valve and the four-way valve assembly in the indoor unit of the air conditioner, so that the refrigerant is kept at high temperature and high pressure, resulting in better and faster heating effect when it is turned on later.

[0101] The data acquisition module 20 is used to acquire the detection temperature information of the compressor and the saturation temperature information of the compressor.

[0102] In practice, the compressor's temperature detection information includes, but is not limited to, intake temperature and exhaust temperature, and the saturation temperature information includes, but is not limited to, low-pressure saturation temperature and high-pressure saturation temperature.

[0103] The power adjustment module 30 is used to adjust the output power of the refrigerant heating component according to the detected temperature information and the saturation temperature information.

[0104] It should be noted that after determining the detection temperature and saturation temperature information, the intake superheat and exhaust superheat are first calculated, and then the adjustment strategy for the output power of the refrigerant heating component is determined based on the values ​​of intake superheat and exhaust superheat.

[0105] In this embodiment, the storage position of the refrigerant is adjusted by a four-way valve assembly, and the temperature of the refrigerant is balanced by adjusting the output power of the refrigerant heating assembly, thereby ensuring the temperature of the refrigerant after defrosting and improving the heating efficiency after defrosting.

[0106] It should be understood that the above are merely illustrative examples and do not constitute any limitation on the technical solutions of the present invention. In specific applications, those skilled in the art can make settings as needed, and the present invention does not impose any restrictions on this.

[0107] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of this invention. In practical applications, those skilled in the art can select some or all of the workflow to achieve the purpose of this embodiment according to actual needs, and no restrictions are imposed here.

[0108] In addition, for technical details not described in detail in this embodiment, please refer to the air conditioning system control method provided in any embodiment of the present invention, which will not be repeated here.

[0109] Furthermore, 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.

[0110] 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.

[0111] 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, or the part that contributes to the prior art, can be embodied in the form of a software product. This computer software product is stored in a storage medium (such as read-only memory (ROM) / RAM, magnetic disk, optical disk) and includes several instructions to cause a terminal device (which may be a mobile phone, computer, server, or network device, etc.) to execute the methods described in the various embodiments of the present invention.

[0112] 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 method for controlling an air conditioning system, characterized in that, The air conditioning system control method is applied to an air conditioning system, which includes a four-way valve assembly, a refrigerant heating assembly, an outdoor air conditioning unit, and an indoor air conditioning unit. The refrigerant heating assembly is connected to the compressor of the outdoor air conditioning unit, and the four-way valve assembly is connected to both the outdoor air conditioning unit and the indoor air conditioning unit. The air conditioning system control method includes: When the air conditioning system is in defrost mode, the connection state of the four-way valve assembly is adjusted to store refrigerant between the evaporator electronic expansion valve of the indoor unit of the air conditioner and the four-way valve assembly; Obtain the detection temperature information and the saturation temperature information of the compressor; The inhalation detection temperature and the exhaust detection temperature are determined based on the detected temperature information. The low-pressure saturation temperature and the high-pressure saturation temperature are determined based on the saturation temperature information. The output power of the refrigerant heating component is adjusted according to the intake detection temperature, the exhaust detection temperature, the low-pressure saturation temperature, and the high-pressure saturation temperature. The four-way valve assembly includes a first four-way valve and a second four-way valve. The first four-way valve is connected to the outdoor unit of the air conditioner and the compressor, respectively, and the second four-way valve is connected to the indoor unit of the air conditioner and the first four-way valve, respectively. When the air conditioning system is in defrost mode, adjusting the connection state of the four-way valve assembly includes: When the air conditioning system is in defrost mode, the power supply to the first four-way valve is turned on, the power supply to the second four-way valve is turned off, the refrigerant heating component is turned on, the evaporator electronic expansion valve of the indoor unit and the fan of the indoor unit are turned off, and the refrigerant is stored between the evaporator electronic expansion valve and the four-way valve component of the indoor unit.

2. The air conditioning system control method as described in claim 1, characterized in that, The step of adjusting the output power of the refrigerant heating component based on the intake detection temperature, the exhaust detection temperature, the low-pressure saturation temperature, and the high-pressure saturation temperature includes: The intake superheat is determined based on the intake detection temperature and the low-pressure saturation temperature. The exhaust superheat is determined based on the exhaust detection temperature and the high-pressure saturation temperature. The output power of the refrigerant heating component is adjusted according to the intake superheat and the exhaust superheat.

3. The air conditioning system control method as described in claim 2, characterized in that, The step of adjusting the output power of the refrigerant heating component based on the intake superheat and the exhaust superheat includes: When the intake superheat is less than the first threshold, the output power of the refrigerant heating component is increased to the first output power; When the intake superheat is greater than or equal to the first threshold and less than the second threshold, the output power of the refrigerant heating component is adjusted according to the exhaust superheat. When the intake superheat is greater than the second threshold, the output power of the refrigerant heating component is not adjusted.

4. The air conditioning system control method as described in claim 3, characterized in that, When the intake superheat is greater than or equal to the first threshold and less than the second threshold, adjusting the output power of the refrigerant heating component according to the exhaust superheat includes: When the intake superheat is greater than or equal to the first threshold and less than the second threshold, if the exhaust superheat is greater than the third threshold, the output power of the refrigerant heating component will not be adjusted. When the intake superheat is greater than or equal to the first threshold and less than the second threshold, if the exhaust superheat is less than or equal to the third threshold, the output power of the refrigerant heating component is adjusted to the second output power.

5. The air conditioning system control method as described in claim 2, characterized in that, After adjusting the output power of the refrigerant heating component based on the intake superheat and the exhaust superheat, the method further includes: When the output power of the refrigerant heating component and the suction superheat meet the frequency reduction conditions, the defrosting frequency of the compressor is reduced to the target frequency. When the target frequency is the preset minimum frequency and the intake superheat meets the frequency reduction condition, the air conditioning system is switched to cooling mode for defrosting.

6. An air conditioning system control device, characterized in that, The air conditioning system control device is applied to an air conditioning system, which includes a four-way valve assembly, a refrigerant heating assembly, an outdoor unit, and an indoor unit. The refrigerant heating assembly is connected to the compressor of the outdoor unit. The four-way valve assembly is connected to both the outdoor unit and the indoor unit. The four-way valve assembly includes a first four-way valve and a second four-way valve. The first four-way valve is connected to both the outdoor unit and the compressor, and the second four-way valve is connected to both the indoor unit and the first four-way valve. The air conditioning system control device includes: The connection adjustment module is used to adjust the connection state of the four-way valve assembly when the air conditioning system is in defrost mode, so as to store refrigerant between the evaporator electronic expansion valve of the air conditioning indoor unit and the four-way valve assembly. The data acquisition module is used to acquire the detection temperature information and the saturation temperature information of the compressor. The power adjustment module is used to determine the intake detection temperature and exhaust detection temperature based on the detected temperature information; determine the low-pressure saturation temperature and high-pressure saturation temperature based on the saturation temperature information; and adjust the output power of the refrigerant heating component based on the intake detection temperature, the exhaust detection temperature, the low-pressure saturation temperature, and the high-pressure saturation temperature. The connection adjustment module is also used to, when the air conditioning system is in defrost mode, connect the power supply of the first four-way valve, disconnect the power supply of the second four-way valve, turn on the refrigerant heating component, turn off the evaporator electronic expansion valve of the air conditioning indoor unit and the fan of the air conditioning indoor unit, and store the refrigerant between the evaporator electronic expansion valve of the air conditioning indoor unit and the four-way valve component.

7. An air conditioning system, characterized in that, The air conditioning system includes: a memory, a processor, and an air conditioning system control program stored in the memory and running on the processor, the air conditioning system control program being configured to implement the air conditioning system control method as described in any one of claims 1 to 5.

8. A storage medium, characterized in that, The storage medium stores an air conditioning system control program, which, when executed by a processor, implements the air conditioning system control method as described in any one of claims 1 to 5.

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