Air conditioner control method, air conditioner and readable storage medium

Abstract

This invention discloses a control method for an air conditioner, an air conditioner, and a readable storage medium. The air conditioner includes an outdoor unit, at least one indoor unit, and a hydraulic module. Both the indoor unit and the hydraulic module are connected to the outdoor unit, and the hydraulic module and the indoor unit are connected in parallel. The control method for the air conditioner includes: acquiring the current exhaust temperature of the compressor in the outdoor unit and determining a target exhaust temperature; determining control parameters for a throttling device in the air conditioner based on the temperature difference between the current exhaust temperature and the target exhaust temperature, and at least one of the operating parameters of the air conditioner. The control parameters include the number of adjustment steps and / or the adjustment cycle; and controlling the throttling device according to the control parameters. This solves the problem of excessively high compressor exhaust temperature causing compressor protection shutdown, which is detrimental to the reliability of the air conditioner, and improves the reliability of the air conditioner.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of air conditioning equipment, and in particular to a control method of an air conditioner, the air conditioner and a readable storage medium. BACKGROUND

[0002] For an air conditioner with a hydraulic module, the higher the outlet water temperature requirement is in the process of heating water, the higher the condensing temperature is. When the condensing temperature rises, it is easy to cause the condensing side pressure of the air conditioner to be too high, and further cause the discharge temperature of the compressor of the outdoor unit to rise. If the electronic expansion valve does not respond more quickly, the excessively high discharge temperature of the compressor will cause the compressor to be protected and shut down, resulting in reduced reliability of the air conditioner. SUMMARY

[0003] Embodiments of the present application provide a control method of an air conditioner, the air conditioner, and a readable storage medium, aiming to improve the reliability of the air conditioner.

[0004] The present application provides a control method of an air conditioner, the air conditioner comprising: an outdoor unit, at least one indoor unit and a hydraulic module, the indoor unit and the hydraulic module being connected to the outdoor unit, the hydraulic module and the indoor unit being connected in parallel, the control method of the air conditioner comprising:

[0005] obtaining a current discharge temperature of a compressor in the outdoor unit and determining a target discharge temperature;

[0006] determining a control parameter of a throttling device in the air conditioner according to at least one of a temperature difference between the current discharge temperature and the target discharge temperature and an operating parameter of the air conditioner, the control parameter comprising an adjustment step number and / or an adjustment period;

[0007] controlling the throttling device according to the control parameter.

[0008] Optionally, the operating parameter comprises a current operating frequency of the compressor and a current water temperature, and the step of determining the control parameter of the throttling device in the air conditioner according to at least one of the temperature difference between the current discharge temperature and the target discharge temperature and the operating parameter of the air conditioner comprises:

[0009] determining an adjustment step number of the throttling device in the air conditioner according to at least one of the current operating frequency of the compressor, the current water temperature, the current discharge temperature and the temperature difference between the current discharge temperature and the target discharge temperature.

[0010] Optionally, the step of determining the adjustment step number of the throttling device in the air conditioner according to at least one of the current operating frequency of the compressor, the current water temperature, the current discharge temperature and the temperature difference between the current discharge temperature and the target discharge temperature comprises:

[0011] determining a first correction coefficient according to a current operating frequency of the compressor, the first correction coefficient being larger as the current operating frequency is larger;

[0012] determining a second correction coefficient according to the current water temperature, the second correction coefficient being larger as the current water temperature is larger;

[0013] determining a third correction coefficient according to the temperature difference, wherein the third correction coefficient is larger as the temperature difference is larger when the temperature difference is larger than a preset temperature value, and the absolute value of the third correction coefficient is larger as the absolute value of the temperature difference is larger when the temperature difference is smaller than the preset temperature value;

[0014] correcting a current adjustment step number based on at least one of the first correction coefficient, the second correction coefficient and the third correction coefficient, and taking the corrected current adjustment step number as an adjustment step number of a throttling device in the air conditioner.

[0015] Optionally, the operating parameter comprises a current discharge temperature of the compressor, and the step of determining the control parameter of the throttling device in the air conditioner according to at least one of the temperature difference between the current discharge temperature and the target discharge temperature and the operating parameter of the air conditioner comprises:

[0016] determining an adjustment period of the throttling device in the air conditioner according to the current discharge temperature of the compressor and / or the temperature difference.

[0017] Optionally, the step of determining the adjustment period of the throttling device in the air conditioner according to the current discharge temperature of the compressor and / or the temperature difference comprises:

[0018] determining a fourth correction coefficient according to the current discharge temperature of the compressor, the fourth correction coefficient being smaller as the current discharge temperature is higher;

[0019] determining a fifth correction coefficient according to the temperature difference;

[0020] correcting a current adjustment period based on the fourth correction coefficient and / or the fifth correction coefficient, and taking the corrected current adjustment period as the adjustment period of the throttling device in the air conditioner.

[0021] Optionally, the step of determining the fifth correction coefficient according to the temperature difference comprises:

[0022] obtaining an absolute value of the temperature difference;

[0023] determining the fifth correction coefficient according to the absolute value of the temperature difference, the fifth correction coefficient being smaller as the absolute value of the temperature difference is larger.

[0024] Optionally, the control method of the air conditioner further comprises:

[0025] The target discharge temperature is determined according to the current operating frequency of the compressor, the outdoor environment temperature, the set outlet water temperature and a temperature compensation constant.

[0026] Optionally, the step of determining the target discharge temperature according to the current operating frequency of the compressor, the outdoor environment temperature, the set outlet water temperature and a temperature compensation constant comprises:

[0027] The current operating frequency of the compressor, the outdoor environment temperature, the set outlet water temperature and the temperature compensation constant are acquired;

[0028] A frequency correlation coefficient is determined according to the current operating frequency of the compressor, a temperature correlation coefficient is determined according to the outdoor environment temperature, and a set temperature correlation coefficient is determined according to the set outlet water temperature;

[0029] The target discharge temperature is determined according to the current operating frequency and the frequency correlation coefficient, the outdoor environment temperature and the temperature correlation coefficient, the set outlet water temperature and the set temperature correlation coefficient, and the temperature compensation constant.

[0030] In addition, to achieve the above object, the application further provides an air conditioner, which comprises a memory, a processor and an air conditioner control program stored in the memory and executable on the processor, and the air conditioner control program implements the steps of the air conditioner control method when executed by the processor.

[0031] In addition, to achieve the above object, the application further provides a storage medium having an air conditioner control program stored thereon, and the air conditioner control program implements the steps of the air conditioner control method when executed by a processor.

[0032] The air conditioner control method, the air conditioner and the readable storage medium provided in the embodiments of the application have the following advantages: the adjustment step number and / or adjustment period of the throttling device in the air conditioner are determined according to the temperature difference between the current discharge temperature and the target discharge temperature and at least one of the operating parameters of the air conditioner, and the throttling device is adjusted based on the adjustment step number and / or adjustment period, so that when the set outlet water temperature of the water module is high, the pressure on the system condenser side is high, the adjustment step number and / or adjustment period of the throttling device are determined in combination with the operating parameters, the opening degree of the throttling device can be quickly increased in the case that the pressure of the multi-split air conditioning system is high, the pressure of the multi-split air conditioning system is balanced, the compressor shutdown protection caused by the excessively high discharge temperature of the compressor is prevented, and the reliability of the operation of the multi-split air conditioning system is improved. BRIEF DESCRIPTION OF DRAWINGS

[0033] Figure 1Structure schematic diagram of air conditioner involved in embodiment scheme of the present application;

[0034] Figure 2 Another structure schematic diagram of air conditioner involved in embodiment scheme of the present application;

[0035] Figure 3 Flow schematic diagram of control method of air conditioner of the present application;

[0036] Figure 4 Flow schematic diagram of control method of air conditioner of the present application;

[0037] Figure 5 Flow schematic diagram of control method of air conditioner of the present application;

[0038] Figure 6 Flow schematic diagram of control method of air conditioner of the present application;

[0039] Figure 7 Flow schematic diagram of control method of air conditioner of the present application.

[0040] Reference signs:

[0041] Hydraulic module 100; water flow path 101; water pump 110; water side heat exchanger 120; water flow pipe 121; heat exchange pipe 122; first refrigerant temperature sensor 123; second refrigerant temperature sensor 124; water inlet temperature sensor 125; water outlet temperature sensor 126; water inlet pipe 130; water outlet pipe 140; expansion tank 150; automatic exhaust valve 160; water flow switch 170;

[0042] Outdoor unit 200; first refrigerant flow path 201; second refrigerant flow path 202; compressor 210; exhaust temperature sensor 211; vapor-liquid separator 212; outdoor heat exchanger 220; throttling device 230; capillary tube 231; first electronic expansion valve 232; second electronic expansion valve 233; third electronic expansion valve 234; four-way valve 240;

[0043] Indoor heat exchanger 300;

[0044] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings, which are only one embodiment diagram and not the whole of the present application. DETAILED DESCRIPTION

[0045] It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application.

[0046] The main technical solution adopted in this application embodiment is as follows: a control method for an air conditioner based on an air conditioner with a hydraulic module is proposed. The air conditioner includes an outdoor unit, at least one indoor unit, and a hydraulic module. The indoor unit and the hydraulic module are both connected to the outdoor unit, and the hydraulic module and the indoor unit are connected in parallel. The control method for the air conditioner includes: obtaining the current exhaust temperature of the compressor in the outdoor unit and determining a target exhaust temperature; determining control parameters of a throttling device in the air conditioner based on the temperature difference between the current exhaust temperature and the target exhaust temperature, and at least one of the operating parameters of the air conditioner, wherein the control parameters include the number of adjustment steps and / or the adjustment cycle; and controlling the throttling device according to the control parameters.

[0047] During the hot water production process, the required condensing temperature (i.e., the outlet water temperature) increases. When the condensing temperature rises, it can easily lead to excessive pressure in the air conditioner, which in turn causes the exhaust temperature of the outdoor unit's compressor to rise. If the electronic expansion valve does not respond quickly enough, the excessively high compressor exhaust temperature will cause the compressor to shut down for protection, resulting in reduced reliability of the air conditioner.

[0048] This invention provides the above-mentioned technical solution. Under high frequency / high water temperature (condensing temperature) / high exhaust conditions, the pressure of a multi-split air conditioning system is generally high. By correcting the temperature difference between the current exhaust temperature and the target exhaust temperature, the compressor operating frequency, water temperature, and exhaust temperature, the number of adjustment steps of the throttling device increases accordingly, and the adjustment cycle shortens accordingly. This allows for a rapid increase in the opening of the throttling device when the pressure of the multi-split air conditioning system is high, balancing the pressure of the multi-split air conditioning system, preventing shutdown protection caused by excessively high compressor exhaust temperature, and improving the reliability of the multi-split air conditioning system. Under low frequency and low pressure conditions, by correcting the temperature difference between the exhaust temperature, the current exhaust temperature, and the target exhaust temperature, the number of adjustment steps of the throttling device decreases accordingly, and the adjustment cycle lengthens accordingly. This ensures stable operation of the multi-split air conditioning system, reduces the likelihood of valve over-adjustment and oscillating adjustment, minimizes fluctuations in outlet air temperature, and reduces the risk of condensation.

[0049] In one implementation, the air conditioner may consist only of an outdoor unit 200 and at least one hydraulic module 100.

[0050] Optionally, the hardware environment architecture involved in the control method of the air conditioner can also be as follows: Figure 1 As shown. The air conditioner includes an outdoor unit 200, at least one indoor unit, and at least one hydraulic module 100. The indoor heat exchanger 300 of the indoor unit and the hydraulic module 100 are both connected to the outdoor unit 200, and the hydraulic module 100 and the indoor unit are connected in parallel.

[0051] In other embodiments, the number of indoor units and hydraulic modules 100 can be set according to actual needs.

[0052] At least one hydraulic module 100 and at least one indoor unit can be arranged in the same space or distributed in different space areas according to actual needs. Here, different space areas specifically refer to mutually separated space areas.

[0053] The indoor unit, the outdoor unit 200, the hydraulic module 100, and the connection relationship between each module are described in detail below.

[0054] The hydraulic module 100 includes a water pump 110, a water-side heat exchanger 120, a water inlet pipe 130, and a water outlet pipe 140. One end of the water inlet pipe 130 is a water inlet interface, and the other end is connected to the water inlet end of the water pump 110. The water outlet end of the water pump 110 is connected to the water-side heat exchanger 120. The water-side heat exchanger 120 is provided with a water flow pipe 121 and a heat exchange pipe 122. One end of the water flow pipe 121 is connected to the water outlet end of the water pump 110, and the other end of the water flow pipe 121 is connected to the water outlet pipe 140, thereby forming a water flow path 101. The water outlet pipe 140 is provided with an expansion tank 150, which balances the water volume and pressure of the water flow path 101. The end of the water outlet pipe 140 is provided with a water outlet interface. The heat exchange pipe 122 is used to connect with the outdoor unit 200, and the water and refrigerant are exchanged through the water-side heat exchanger 120, which can heat the water to obtain hot water, or cool the water, thereby providing water at a set temperature through the water flow path 101. The water inlet interface is connected to a water supply pipe, and the water outlet interface is connected to a domestic water equipment, which is suitable for air energy water heaters, floor heating, and other equipment.

[0055] Referring to Figure 1 It can be understood that the outdoor unit 200 includes a compressor 210, an outdoor heat exchanger 220, a throttling device 230, and a four-way valve 240. The compressor 210 is provided with an exhaust port and an intake port, and the four-way valve 240 is provided with a first valve port D, a second valve port S, a third valve port C, and a fourth valve port E. The exhaust port is connected to the first valve port D, and the intake port is connected to the second valve port S. One end of the outdoor heat exchanger 220 is connected to the third valve port C, and the other end is connected to the throttling device 230. The throttling device 230 is provided with a first refrigerant flow path 201 and a second refrigerant flow path 202 between the fourth valve port E. The first refrigerant flow path 201 and the second refrigerant flow path 202 are connected in parallel, the first refrigerant flow path 201 is connected to the indoor heat exchanger 300, and the second refrigerant flow path 202 is connected to the heat exchange pipe 122 of the water-side heat exchanger 120, so that the refrigerant can be exchanged through the indoor heat exchanger 300 and the water-side heat exchanger 120. The four-way valve 240 can switch one of the third valve port C and the fourth valve port E to communicate with the first valve port D, and the other to communicate with the second valve port S, thereby controlling the flow direction of the refrigerant.

[0056] Referring to Figure 1As shown, specifically, the refrigerant provided by the outdoor unit 200 can be exchanged by the indoor heat exchanger 300, so that heating or cooling of the indoor environment can be achieved. It should be noted that the indoor unit of the embodiment can be a vertical cabinet machine, a wall-mounted indoor unit, a ducted air conditioner, etc., and the specific implementation is not limited.

[0057] Referring to Figure 1 As shown, it can be understood that the outdoor unit 200 can provide refrigerant to the water module 100 and the indoor heat exchanger 300 for heat exchange, that is, the water module 100 and the indoor unit share the same outdoor unit 200.

[0058] It should be noted that the indoor unit and the water module 100 can be operated at the same time, and at this time the outdoor unit 200 can simultaneously deliver refrigerant to the water module 100 and the indoor heat exchanger 300. Taking heating as an example for description, referring to Figure 1 As shown, the first valve port D of the four-way valve 240 is in communication with the fourth valve port E, and the second valve port S is in communication with the third valve port C. The high-temperature refrigerant discharged from the exhaust port of the compressor 210 passes through the first valve port D and the fourth valve port E in sequence. Part of the refrigerant flows to the indoor heat exchanger 300 through the first refrigerant flow path 201 for heat exchange, thereby heating the indoor environment. Another part of the refrigerant flows to the water-side heat exchanger 120 through the second refrigerant flow path 202, so that the refrigerant exchanges heat with water, and the water flow path 101 generates hot water and is delivered to the water-using equipment through the water outlet pipe 140. The refrigerant exchanged through the heat exchanger passes through the throttling device 230, the outdoor heat exchanger 220, and the four-way valve 240 in sequence, and then returns to the compressor 210.

[0059] Referring to Figure 1 As shown, it can be understood that in some embodiments, the outdoor unit 200 further comprises a switch valve (not shown in the figure), which is arranged in the second refrigerant flow path 202. The switch valve can open or close the second refrigerant flow path 202. When the switch valve is opened, the heat exchange pipeline 122 is connected, and at this time the refrigerant can exchange heat through the water-side heat exchanger 120. When the switch valve is closed, the heat exchange pipeline 122 is disconnected, and at this time the refrigerant does not flow through the water-side heat exchanger 120. It can be understood that considering that the water module 100 is mainly used to provide hot water to the air energy water heater or the floor heating and the like, when the indoor unit needs to be cooled, low-temperature refrigerant will flow through the first refrigerant flow path 201, at this time the water-side heat exchanger 120 does not need to exchange heat with the refrigerant to produce cold water, therefore the second refrigerant flow path 202 can be closed by the switch valve, and the water pump 110 stops working, that is, the water module 100 does not work, so that the water temperature of the water-using equipment is not affected when the indoor unit is cooled.

[0060] Referring to Figure 1As shown, it can be understood that the throttling device 230 of the embodiment includes a first electronic expansion valve 232, a second electronic expansion valve 233, a third electronic expansion valve 234, and a capillary tube 231. Taking the first electronic expansion valve 232 as an example, one end of the first electronic expansion valve 232 is connected with the first refrigerant flow path 201, and the other end is connected with one end of the capillary tube 231, and the other end of the capillary tube 231 is connected with the outdoor heat exchanger 220. During heating, the refrigerant is throttled by the first electronic expansion valve 232 and the capillary tube 231 in sequence after heat exchange through the first refrigerant flow path 201 and the second refrigerant flow path 202. The first electronic expansion valve 232 and the capillary tube 231 both have the function of throttling and reducing pressure, that is, the refrigerant is throttled by two stages. It should be noted that, compared with the throttling structure using only one electronic expansion valve or capillary tube, the embodiment throttles the refrigerant by two stages, which can further reduce the refrigerant pressure, increase the liquid refrigerant, and is beneficial to increase the refrigerant flow and improve the heat exchange efficiency.

[0061] Referring to Figure 1 As shown, it can be understood that in some embodiments, the first refrigerant temperature sensor 123 is arranged at the inlet end of the heat exchange pipeline 122, and the second refrigerant temperature sensor 124 is arranged at the outlet end of the heat exchange pipeline 122. The first refrigerant temperature sensor 123 can be used to detect the temperature of the refrigerant before entering the water-side heat exchanger 120, and the second refrigerant temperature sensor 124 can be used to detect the temperature of the refrigerant after heat exchange through the water-side heat exchanger 120. In the embodiment, the first refrigerant temperature sensor 123 and the second refrigerant temperature sensor 124 can be connected with the electronic control board. The temperature collected by the first refrigerant temperature sensor 123 and the second refrigerant temperature sensor 124 can be used to determine the state of the refrigerant, so as to determine the running state of the outdoor unit 200. It should be noted that the compressor 210 of the embodiment is a variable frequency compressor, and the running frequency of the compressor 210 can be controlled to adjust the temperature of the refrigerant, so as to achieve the purpose of adjusting the water temperature.

[0062] Referring to Figure 1 As shown, it should be noted that in the embodiment, the discharge temperature sensor 211 is arranged between the discharge port of the compressor 210 and the first valve port D. The gas-liquid separator 212 is arranged between the suction port of the compressor 210 and the suction port. The discharge temperature sensor 211 is used to detect the discharge temperature of the compressor 210, so as to determine whether the compressor 210 is running normally.

[0063] It can be understood that, taking heating as an example, the outdoor heat exchanger 220 is an evaporator, the high-temperature and high-pressure refrigerant is discharged from the exhaust port, passes through the four-way valve 240 to enter the indoor heat exchanger 300 and the water-side heat exchanger 120 for heat exchange, the refrigerant is fully depressurized and cooled after heat exchange through the first electronic expansion valve 232 and the capillary tube 231, and then enters the evaporator. After the liquid refrigerant is evaporated, it enters the vapor-liquid separator 212 through the four-way valve 240 for complete vapor-liquid separation and returns to the suction port of the compressor 210. The vapor-liquid separator 212 not only ensures sufficient separation of vapor and liquid, but also ensures that the system has sufficient refrigerant amount.

[0064] Referring to Figure 1 As shown in FIG. 13, in the embodiment, the water inlet of the water flow pipeline 121 is provided with a water inlet temperature sensor 125, and the water outlet of the water flow pipeline 121 is provided with a water outlet temperature sensor 126. The water inlet temperature sensor 125 can be used to detect the temperature of the water flow before entering the water-side heat exchanger 120, and the water outlet temperature sensor 126 can be used to detect the temperature of the water flow after heat exchange in the water-side heat exchanger 120. In the embodiment, the water inlet temperature sensor 125 and the water outlet temperature sensor 126 are connected with the electric control board. The temperature collected by the water inlet temperature sensor 125 and the water outlet temperature sensor 126 can be used to determine the change state of the water temperature, so as to determine the running state of the water power module 100, and it can be quickly judged whether the water power module 100 is normally running.

[0065] It should be noted that, in the embodiment, the water-side heat exchanger 120 is a plate heat exchanger or a jacket heat exchanger. The plate heat exchanger and the jacket heat exchanger both include the water flow pipeline 121 and the heat exchange pipeline 122. Heat exchange is performed between the water flow pipeline 121 and the heat exchange pipeline 122, the heat of the refrigerant is transferred to the water, so as to heat the water and achieve the purpose of producing hot water.

[0066] Referring to Figure 2 As shown in FIG. 13, in the embodiment, the water power module 100 further includes an automatic exhaust valve 160 and a water flow switch 170. The automatic exhaust valve 160, the water flow switch 170 and the expansion tank 150 are all connected to the pipeline between the water-side heat exchanger 120 and the water outlet. The automatic exhaust valve 160 is used to exhaust the gas in the water flow path 101, so as to relieve the pressure of the water flow path 101. The water flow switch 170 is used to detect whether the water flow is normal. The water flow switch 170 can feed back the detected water flow signal to the electric control board.

[0067] Optionally, the control method of the air conditioner involves a hardware architecture including the air conditioner or a control terminal of the air conditioner, and the control terminal is used to control the air conditioner.

[0068] As an implementation manner, referring to Figure 3The air conditioner or control terminal includes: a processor 101, such as a CPU, a memory 102, and a communication bus 103. The communication bus 103 is used to establish communication between these components. The processor 102 is used to call an application program to execute control operations.

[0069] The memory 102 can be a high-speed RAM memory or a stable memory, such as a disk storage device.

[0070] It is understood that, in one embodiment, the control program that implements the control process of the air conditioner is stored in the memory 102 of the air conditioner or in a computer-readable storage medium. When the processor 101 calls the control program from the memory 102 or the computer-readable storage medium, it performs the following operations:

[0071] Obtain the current exhaust temperature of the compressor in the outdoor unit and determine the target exhaust temperature;

[0072] Based on the temperature difference between the current exhaust temperature and the target exhaust temperature, and at least one of the operating parameters of the air conditioner, the control parameters of the throttling device in the air conditioner are determined, and the control parameters include the number of adjustment steps and / or the adjustment cycle.

[0073] The throttling device is controlled according to the control parameters.

[0074] Based on the hardware architecture of the air conditioner described above, the following embodiments of the present invention are proposed.

[0075] To better understand the above technical solutions, exemplary embodiments of this disclosure will be described in more detail below with reference to the accompanying drawings. While exemplary embodiments of this disclosure are shown in the drawings, it should be understood that this disclosure can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of this disclosure to those skilled in the art.

[0076] First Embodiment

[0077] like Figure 4 As shown, in the first embodiment of this application, the control method for the air conditioner includes the following steps:

[0078] Step S110: Obtain the current exhaust temperature of the compressor in the outdoor unit and determine the target exhaust temperature.

[0079] Optionally, the current discharge temperature of the compressor in the outdoor unit can be obtained through the exhaust temperature sensor. The discharge temperature of the compressor in a preset time period can be obtained, the average value of the discharge temperature in the preset time period is calculated according to the discharge temperature of the compressor in the preset time period, and the average value of the discharge temperature is determined as the current discharge temperature of the compressor in the outdoor unit, so that the obtained current discharge temperature of the compressor is more accurate.

[0080] Optionally, the current discharge temperature of the compressor in the outdoor unit can be obtained when the water heating instruction is received by the water module or after a preset time period of receiving the water heating instruction. Alternatively, the current discharge temperature of the compressor in the outdoor unit can be obtained when the water heating instruction is received by the water module and the heating instruction is received by the air conditioner. Alternatively, the current discharge temperature of the compressor in the outdoor unit can be obtained when the heating instruction is received by the air conditioner. Alternatively, for the scene of air conditioner heating, the current discharge temperature of the compressor in the outdoor unit can be determined according to the number of air conditioner indoor units started, for example, when the number of indoor units started reaches a preset number, the current discharge temperature of the compressor in the outdoor unit is obtained. Alternatively, the current discharge temperature of the compressor in the outdoor unit can be obtained according to the energy demand of the water module, for example, when the energy demand of the water module reaches a preset energy demand, the current discharge temperature of the compressor in the outdoor unit is obtained. Since the conditions for obtaining the current discharge temperature in different scenes are set, the current discharge temperature is obtained more flexibly.

[0081] Optionally, factors affecting the discharge temperature include, but are not limited to, compression ratio, condensation pressure, etc. It can be understood that the larger the compression ratio, the higher the discharge temperature, and reducing the compression ratio can significantly reduce the discharge temperature. The higher the condensation pressure, the higher the compression ratio, and the discharge temperature will rise. The higher the condensation pressure, the higher the corresponding condensation temperature, which will increase the discharge temperature of the compressor.

[0082] Optionally, the target discharge temperature refers to the target temperature that the compressor needs to reach, and the air conditioner can stably operate without compressor shutdown protection failure at the target discharge temperature. The target discharge temperature can be determined according to the current operating frequency of the compressor, the outdoor environment temperature, the set water outlet temperature, etc.

[0083] Step S120, according to the temperature difference between the current discharge temperature and the target discharge temperature, at least one of the operating parameters of the air conditioner, determine the control parameter of the throttling device in the air conditioner, the control parameter includes adjustment step and / or adjustment period.

[0084] Step S130, according to the control parameter controls the throttling device.

[0085] Optionally, the operating parameters of the air conditioner include a current operating frequency of the compressor, a current water temperature, a current discharge temperature, etc. The operating parameters of the air conditioner can also include a system operating mode, a set water outlet temperature, an outdoor environment temperature, an inlet and outlet water temperature sensing bulb temperature, etc. Among them, the system operating mode and the set water outlet temperature can be obtained by setting according to actual conditions, and the outdoor environment temperature and the discharge temperature can be detected by corresponding temperature sensors. For example, an outdoor environment temperature sensor can be arranged on an outdoor heat exchanger of the outdoor unit, and the outdoor environment temperature can be acquired by the outdoor environment temperature sensor.

[0086] Optionally, the adjustment step refers to the change amount of the opening degree of the throttling device required to adjust the current discharge temperature of the compressor in the outdoor unit to the target discharge temperature. The adjustment period refers to how many periods the throttling device needs to adjust the current discharge temperature of the compressor in the outdoor unit to the target discharge temperature. It can be understood that, considering the system error, the current discharge temperature can be adjusted to the target discharge temperature or to a preset temperature range of the target discharge temperature as much as possible. When the current discharge temperature and the target discharge temperature differ greatly, the adjustment step of the throttling device can be increased, so that the current discharge temperature can reach the target discharge temperature as soon as possible, and the compressor shutdown protection caused by the untimely adjustment of the throttling device can be avoided. When the current discharge temperature and the target discharge temperature differ slightly, the adjustment step of the throttling device can be reduced, so that the adjustment speed is not too fast, and the over-adjustment, the back-and-forth oscillation adjustment, and the condensation problem caused by the cold and hot air can be avoided.

[0087] Optionally, after determining the current exhaust temperature and the target exhaust temperature, a temperature difference between the current exhaust temperature and the target exhaust temperature is calculated. The adjustment step number of the throttling device in the air conditioner is determined according to the temperature difference. The throttling device is controlled according to the adjustment step number. Alternatively, the adjustment period of the throttling device in the air conditioner is determined according to the temperature difference. The throttling device is controlled according to the adjustment period. Alternatively, the adjustment step number and the adjustment period of the throttling device in the air conditioner are determined according to the temperature difference. The throttling device is controlled according to the adjustment step number and the adjustment period. Optionally, the adjustment step number of the throttling device in the air conditioner is determined according to the operating parameter of the multi-connected air conditioner. The throttling device is controlled according to the adjustment step number. Alternatively, the adjustment period of the throttling device in the air conditioner is determined according to the operating parameter of the multi-connected air conditioner. The throttling device is controlled according to the adjustment period. Alternatively, the adjustment step number and the adjustment period of the throttling device in the air conditioner are determined according to the operating parameter of the multi-connected air conditioner. The throttling device is controlled according to the adjustment step number and the adjustment period. Optionally, the adjustment step number of the throttling device in the air conditioner is determined according to the temperature difference between the current exhaust temperature and the target exhaust temperature and the operating parameter of the air conditioner. The throttling device is controlled according to the adjustment step number. Alternatively, the adjustment period of the throttling device in the air conditioner is determined according to the temperature difference between the current exhaust temperature and the target exhaust temperature and the operating parameter of the air conditioner. The throttling device is controlled according to the adjustment period. Alternatively, the adjustment step number and the adjustment period of the throttling device in the air conditioner are determined according to the temperature difference between the current exhaust temperature and the target exhaust temperature and the operating parameter of the air conditioner. The throttling device is controlled according to the adjustment step number and the adjustment period. Since the adjustment mode of the throttling device can be determined based on different scenarios and according to different needs, and the throttling device is adjusted based on the corresponding adjustment step number and / or adjustment period, the flexibility and stability of the air conditioner adjustment are improved.

[0088] Optionally, the throttling device described above can be the first electronic expansion valve or the second electronic expansion valve on the indoor unit heat exchange circuit (provided that the indoor unit is turned on), or the third electronic expansion valve on the hydraulic module heat exchange circuit. The first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve can be adjusted simultaneously, or only one of the first electronic expansion valve, the second electronic expansion valve, and the third electronic expansion valve can be adjusted. Thus, the refrigerant pressure on different circuits can be adjusted according to different situations.

[0089] The embodiment according to the above technical scheme, since the adjusting step number and / or adjusting period of the throttling device in the air conditioner is determined according to at least one of the temperature difference between the current exhaust temperature and the target exhaust temperature and the operating parameter of the air conditioner, and then the air conditioner is adjusted according to the adjusting step number and / or adjusting period, the opening degree of the throttling device can be quickly increased in the case that the pressure of the multi-connected air conditioning system is too high, the pressure of the multi-connected air conditioning system is balanced, the compressor shutdown protection caused by the too high exhaust temperature of the compressor is prevented, and the reliability of the operation of the multi-connected air conditioning system is improved.

[0090] Second embodiment

[0091] Reference Condition Based on the first embodiment, in the second embodiment of the present application, the control method of the air conditioner of the present application comprises the following steps:

[0092] In step S110, the current exhaust temperature of the compressor in the outdoor unit is obtained, and the target exhaust temperature is determined.

[0093] In step S221, the adjusting step number of the throttling device in the air conditioner is determined according to at least one of the current operating frequency of the compressor of the air conditioner, the current water temperature, the temperature difference between the current exhaust temperature and the target exhaust temperature.

[0094] Optionally, when the operating parameter includes the current operating frequency of the compressor and the current water temperature, the adjusting step number of the throttling device in the air conditioner can be determined according to at least one of the current operating frequency of the compressor of the air conditioner, the current water temperature, the current exhaust temperature and the temperature difference between the target exhaust temperature.

[0095] Optionally, the adjusting step number of the throttling device in the air conditioner is determined according to the current operating frequency of the compressor of the air conditioner. Alternatively, the adjusting step number of the throttling device in the air conditioner is determined according to the current water temperature. Alternatively, the adjusting step number is determined according to the temperature difference between the current exhaust temperature and the target exhaust temperature. Alternatively, the adjusting step number is determined according to the current operating frequency of the compressor of the air conditioner and the current water temperature. Alternatively, the adjusting step number is determined according to the current operating frequency of the compressor of the air conditioner and the temperature difference between the current exhaust temperature and the target exhaust temperature. Alternatively, the adjusting step number is determined according to the current water temperature and the temperature difference between the current exhaust temperature and the target exhaust temperature. Alternatively, the adjusting step number is determined according to the current operating frequency of the compressor of the air conditioner, the current water temperature and the temperature difference between the current exhaust temperature and the target exhaust temperature, which can improve the accuracy of the determined adjusting step number.

[0096] Wherein, the current water temperature can be detected by the outlet water temperature sensor arranged in the water flow module.

[0097] Optionally, determining the adjustment step number of the throttling device in the air conditioner according to at least one of the current operating frequency of the compressor of the air conditioner, the current water temperature, the temperature difference between the current exhaust temperature and the target exhaust temperature comprises: determining a first correction coefficient according to the current operating frequency of the compressor; determining a second correction coefficient according to the current water temperature; determining a third correction coefficient according to the temperature difference; correcting the current adjustment step number based on at least one of the first correction coefficient, the second correction coefficient, and the third correction coefficient, and taking the corrected current adjustment step number as the adjustment step number of the throttling device in the air conditioner.

[0098] Optionally, correcting the current adjustment step number based on at least one of the first correction coefficient, the second correction coefficient, and the third correction coefficient, and taking the corrected current adjustment step number as the adjustment step number of the throttling device in the air conditioner comprises: correcting the current adjustment step number based on the first correction coefficient, and taking the corrected current adjustment step number as the adjustment step number of the throttling device in the air conditioner. Alternatively, correcting the current adjustment step number based on the second correction coefficient, and taking the corrected current adjustment step number as the adjustment step number of the throttling device in the air conditioner. Alternatively, correcting the current adjustment step number based on the third correction coefficient, and taking the corrected current adjustment step number as the adjustment step number of the throttling device in the air conditioner. Alternatively, correcting the current adjustment step number based on the first correction coefficient and the second correction coefficient, and taking the corrected current adjustment step number as the adjustment step number of the throttling device in the air conditioner. Alternatively, correcting the current adjustment step number based on the first correction coefficient and the third correction coefficient, and taking the corrected current adjustment step number as the adjustment step number of the throttling device in the air conditioner. Alternatively, correcting the current adjustment step number based on the second correction coefficient and the third correction coefficient, and taking the corrected current adjustment step number as the adjustment step number of the throttling device in the air conditioner. Alternatively, correcting the current adjustment step number based on the first correction coefficient, the second correction coefficient, and the third correction coefficient, and taking the corrected current adjustment step number as the adjustment step number of the throttling device in the air conditioner.

[0099] The present application takes the example of correcting the current adjustment step number based on the first correction coefficient, the second correction coefficient, and the third correction coefficient, and taking the corrected current adjustment step number as the adjustment step number of the throttling device in the air conditioner. The first correction coefficient, the second correction coefficient, and the third correction coefficient can be adjusted according to actual conditions.

[0100] For example, assuming that the current adjustment step number is P0, the first correction coefficient is b2, the second correction coefficient is b3, and the third correction coefficient is b1. Then the adjustment step number is: P = b1*b2*b3*P0.

[0101] wherein P0 is recommended to be 2 steps, and the range is 1-10 steps;

[0102] b1 is a third correction coefficient, i.e. an exhaust temperature difference correction coefficient. Assuming that Tp is a current exhaust temperature and Tp_trg is a target exhaust temperature, a temperature difference between the current exhaust temperature and the target exhaust temperature is expressed as Tp-Tp_trg. According to the temperature difference, the following table is determined (positive and negative values are transposed to avoid oscillation adjustment):

[0103] b1 value TP - TP_trg < -4°C -4 < TP - TP_trg < -3°C -10 -3 < TP - TP_trg < -2°C -5 -2 < TP = TP_trg < 2°C -3 2 < TP - TP_trg < 3°C 0 3 < TP - TP_trg < 4°C 2 TP - TP_trg > 4°C 4 Condition 9

[0104] For example, when the preset temperature value is -2℃, when the temperature difference is greater than or equal to -2℃, as the temperature difference increases, the corresponding third correction coefficient also increases, and the opening of the corresponding throttling device also increases. When the temperature difference is less than -2℃, as the temperature difference increases, the corresponding third correction coefficient also increases in the opposite direction, and the opening of the corresponding throttling device also decreases in the opposite direction. When the exhaust temperature difference increases, by increasing the third correction coefficient, the number of adjustment steps is increased, the adjustment speed is accelerated, and the target exhaust temperature can be quickly reached. When the exhaust temperature difference decreases, by decreasing the third correction coefficient, the number of adjustment steps is reduced, the adjustment speed is reduced, and overshoot is avoided.

[0105] b2 is a first correction coefficient, i.e. a frequency correction coefficient, which is determined according to the interval in which the frequency is located according to the following table:

[0106] b2 value Fr < 30 Hz 30 Hz < Fr < 60 Hz 0.5 60 Hz < Fr < 90 Hz 1 Fr > 90 Hz 1.5 Condition 2

[0107] For example, when the preset temperature value is -2℃, when the temperature difference is greater than or equal to -2℃, as the temperature difference increases, the corresponding third correction coefficient also increases, and the opening of the corresponding throttling device also increases. When the temperature difference is less than -2℃, as the temperature difference increases, the corresponding third correction coefficient also increases in the opposite direction, and the opening of the corresponding throttling device also decreases in the opposite direction. When the exhaust temperature difference increases, by increasing the third correction coefficient, the number of adjustment steps is increased, the adjustment speed is accelerated, and the target exhaust temperature can be quickly reached. When the exhaust temperature difference decreases, by decreasing the third correction coefficient, the number of adjustment steps is reduced, the adjustment speed is reduced, and overshoot is avoided.

[0108] b3 is a second correction coefficient, i.e. a water temperature correction coefficient, which is determined according to the interval in which the current water temperature Tw is located according to the following table:

[0109] b3 value Tw < 30°C 30°C < Tw < 40°C 0.5 40°C < Tw < 50°C 1 Tw > 50°C 1.5 Figure 5 2

[0110] For example, when the preset temperature value is -2℃, when the temperature difference is greater than or equal to -2℃, as the temperature difference increases, the corresponding third correction coefficient also increases, and the opening of the corresponding throttling device also increases. When the temperature difference is less than -2℃, as the temperature difference increases, the corresponding third correction coefficient also increases in the opposite direction, and the opening of the corresponding throttling device also decreases in the opposite direction. When the exhaust temperature difference increases, by increasing the third correction coefficient, the number of adjustment steps is increased, the adjustment speed is accelerated, and the target exhaust temperature can be quickly reached. When the exhaust temperature difference decreases, by decreasing the third correction coefficient, the number of adjustment steps is reduced, the adjustment speed is reduced, and overshoot is avoided.

[0111] Step S231, controlling the throttling device according to the control parameter.

[0112] Optionally, the time for completing the adjustment step is less than the adjustment period t, that is, the throttling device has completed the corresponding action within the adjustment period. After one adjustment period ends, the next calculation is immediately performed, a new adjustment period and adjustment step are reconfirmed, and the cycle is repeated until the actual discharge temperature of the compressor reaches the target discharge temperature and becomes stable operation, that is, -2≤TP-TP_trg≤2℃.

[0113] In the embodiment, the adjustment step of the throttling device in the air conditioner is determined according to at least one of the current operating frequency of the compressor, the current water temperature, the current discharge temperature and the temperature difference between the current discharge temperature and the target discharge temperature, so that when the discharge temperature difference increases, the adjustment step is increased by increasing the third correction coefficient, the adjustment speed is accelerated, and the target discharge temperature can be quickly reached. When the discharge temperature difference decreases, the adjustment step is reduced by reducing the third correction coefficient, the adjustment speed is reduced, and overshoot is avoided. When the operating frequency is greater, the adjustment step is increased, the adjustment speed is accelerated, and the target discharge temperature can be quickly reached. When the operating frequency decreases, the adjustment step is reduced by reducing the third correction coefficient, the adjustment speed is reduced, and overshoot is avoided. When the current water temperature is greater, the adjustment step is increased, the adjustment speed is accelerated, and the target discharge temperature can be quickly reached. When the current water temperature decreases, the adjustment step is reduced by reducing the third correction coefficient, the adjustment speed is reduced, and overshoot is avoided.

[0114] Third embodiment

[0115] Reference Condition Based on the first embodiment, in the third embodiment of the present application, the control method of the air conditioner of the present application comprises the following steps:

[0116] In step S110, the current discharge temperature of the compressor in the outdoor unit is obtained, and a target discharge temperature is determined.

[0117] In step S321, the adjustment period of the throttling device in the air conditioner is determined according to the current discharge temperature of the compressor and / or the temperature difference between the current discharge temperature and the target discharge temperature.

[0118] Optionally, when the operating parameter includes the current discharge temperature, the adjustment period of the throttling device in the air conditioner can be determined according to the current discharge temperature of the compressor, and / or the temperature difference between the current discharge temperature and the target discharge temperature.

[0119] Optionally, the adjustment period of the throttling device in the air conditioner is determined according to the current discharge temperature of the compressor. Alternatively, the adjustment period of the throttling device in the air conditioner is determined according to the temperature difference between the current discharge temperature and the target discharge temperature. Alternatively, the adjustment period of the throttling device in the air conditioner is determined according to the current discharge temperature of the compressor, and the current discharge temperature and the target discharge temperature, in which case the accuracy of the determined adjustment period is improved.

[0120] Optionally, determining the adjustment period of the throttling device in the air conditioner according to the current discharge temperature of the compressor and / or the temperature difference includes: determining a fourth correction coefficient according to the current discharge temperature of the compressor; determining a fifth correction coefficient according to the temperature difference; correcting the current adjustment period based on the fourth correction coefficient and / or the fifth correction coefficient, and taking the corrected current adjustment period as the adjustment period of the throttling device in the air conditioner.

[0121] Optionally, correcting the current adjustment period based on the fourth correction coefficient and / or the fifth correction coefficient, and taking the corrected current adjustment period as the adjustment period of the throttling device in the air conditioner includes: correcting the current adjustment period based on the fourth correction coefficient, and taking the corrected current adjustment period as the adjustment period of the throttling device in the air conditioner. Alternatively, correcting the current adjustment period based on the fifth correction coefficient, and taking the corrected current adjustment period as the adjustment period of the throttling device in the air conditioner. Alternatively, correcting the current adjustment period based on the fourth correction coefficient and the fifth correction coefficient, and taking the corrected current adjustment period as the adjustment period of the throttling device in the air conditioner.

[0122] The application takes the example of correcting the current adjustment period based on the fourth correction coefficient and the fifth correction coefficient, and taking the corrected current adjustment period as the adjustment period of the throttling device in the air conditioner. The fourth correction coefficient and the fifth correction coefficient can be adjusted according to actual conditions.

[0123] Exemplarily, assuming that the current adjustment period is t0, the fourth correction coefficient is c2, and the fifth correction coefficient is c1. Then the adjustment period is: t = c1*c2*t0.

[0124] Wherein, t0 is recommended to be 60s, and its range is 10-120s;

[0125] c1 is the fifth correction coefficient, i.e. the discharge temperature difference correction coefficient. Assuming that Tp is the current discharge temperature and Tp_trg is the target discharge temperature, the temperature difference between the current discharge temperature and the target discharge temperature is represented as Tp-Tp_trg. According to the absolute value of the temperature difference, the following table is determined:

[0126] c1 value |TP - TP_trg| < 6°C 6°C < |TP - TP_trg| < 12°C 2 |TP - TP_trg| > 12°C 1 Condition 0.5

[0127] Optionally, an absolute value of the temperature difference is obtained, and the fifth correction coefficient is determined according to the absolute value of the temperature difference, wherein the greater the absolute value of the temperature difference, the smaller the fifth correction coefficient. Regardless of high temperature and high pressure or low temperature and low pressure, as the difference between the current exhaust temperature and the target exhaust temperature increases, the corresponding fifth correction coefficient becomes smaller, and the adjustment period becomes shorter, so that the current exhaust temperature can quickly reach the target exhaust temperature. When the difference between the current exhaust temperature and the target exhaust temperature decreases, the corresponding fifth correction coefficient increases, and the adjustment period becomes longer, thereby avoiding overshoot.

[0128] c2 is a fourth correction coefficient, i.e., an exhaust high-temperature correction coefficient, which is determined according to the interval in which the current exhaust temperature is located according to the following table:

[0129] c2 value Tp < 85°C 85°C < Tp < 95°C 1 Tp > 95°C 0.7 Figure 6 0.5

[0130] Wherein, the greater the current exhaust temperature, the smaller the fourth correction coefficient. When the current exhaust temperature increases, the corresponding fourth correction coefficient becomes smaller, and the adjustment period becomes shorter. In a high exhaust state, the system pressure is generally high, and the electronic expansion valve can be quickly opened in the case of high system pressure to balance the system pressure, prevent the machine exhaust temperature from being too high to protect shutdown, and improve the reliability of system operation.

[0131] Step S331, controlling the throttling device according to the adjustment period.

[0132] In the embodiment, the fourth correction coefficient is determined according to the current exhaust temperature of the compressor, and the higher the current exhaust temperature, the smaller the fourth correction coefficient. The fifth correction coefficient is determined according to the temperature difference. The current adjustment period is corrected based on the fourth correction coefficient and / or the fifth correction coefficient, and the corrected current adjustment period is used as the adjustment period of the throttling device in the air conditioner. Regardless of high temperature and high pressure or low temperature and low pressure, as the difference between the current exhaust temperature and the target exhaust temperature increases, the corresponding fifth correction coefficient becomes smaller, and the adjustment period becomes shorter, so that the current exhaust temperature can quickly reach the target exhaust temperature. When the difference between the current exhaust temperature and the target exhaust temperature decreases, the corresponding fifth correction coefficient increases, and the adjustment period becomes longer, thereby avoiding overshoot. In a high exhaust state, the system pressure is generally high, and the electronic expansion valve can be quickly opened in the case of high system pressure to balance the system pressure, prevent the machine exhaust temperature from being too high to protect shutdown, and improve the reliability of system operation.

[0133] Fourth embodiment

[0134] Reference Figure 7 Based on the first embodiment to the third embodiment, in the fourth embodiment of the present application, the control method of the air conditioner of the present application comprises the following steps:

[0135] Step S110, obtaining a current discharge temperature of the compressor in the outdoor unit and determining a target discharge temperature.

[0136] Step S421, determining an adjustment step number and an adjustment period of the throttling device in the air conditioner according to a temperature difference between the current discharge temperature and the target discharge temperature, a current operating frequency of the compressor, a current water temperature, and the current discharge temperature of the compressor.

[0137] Step S431, controlling the throttling device according to the adjustment step number and the adjustment period.

[0138] Optionally, the specific adjustment process of the adjustment step number and the adjustment period refers to the second embodiment and the third embodiment, which will not be described here.

[0139] Optionally, a first correction coefficient is determined according to the current operating frequency of the compressor, the greater the current operating frequency, the greater the first correction coefficient; a second correction coefficient is determined according to the current water temperature, the greater the current water temperature, the greater the second correction coefficient; a third correction coefficient is determined according to the temperature difference, wherein when the temperature difference is greater than a preset temperature value, the greater the temperature difference, the greater the third correction coefficient, and when the temperature difference is less than the preset temperature value, the greater the absolute value of the temperature difference, the greater the absolute value of the third correction coefficient; the current adjustment step number is corrected based on at least one of the first correction coefficient, the second correction coefficient, and the third correction coefficient, and the corrected current adjustment step number is taken as the adjustment step number of the throttling device in the air conditioner. A fourth correction coefficient is determined according to the current discharge temperature of the compressor, the higher the current discharge temperature, the smaller the fourth correction coefficient; the absolute value of the temperature difference is obtained, and a fifth correction coefficient is determined according to the absolute value of the temperature difference, the greater the absolute value of the temperature difference, the smaller the fifth correction coefficient; the current adjustment period is corrected based on the fourth correction coefficient and / or the fifth correction coefficient, and the corrected current adjustment period is taken as the adjustment period of the throttling device in the air conditioner. The throttling device is controlled according to the adjustment step number and the adjustment period

[0140] The embodiment according to the above technical solution can realize that, in a high frequency / high water temperature (condensation temperature) / high exhaust state, the pressure of the multi-connected air conditioning system is generally high, the difference between the current exhaust temperature and the target exhaust temperature, the compressor operating frequency, the water temperature and the exhaust temperature are corrected, so that the adjustment step of the throttling device is correspondingly increased and the adjustment period is correspondingly shortened, the opening of the throttling device can be quickly increased in the case that the pressure of the multi-connected air conditioning system is high, the pressure of the multi-connected air conditioning system is balanced, the shutdown protection caused by the too high exhaust temperature of the compressor is prevented, and the reliability of the multi-connected air conditioning system is improved. In a low frequency and low pressure state, the adjustment step of the throttling device is correspondingly reduced and the adjustment period is correspondingly lengthened through the correction of the difference between the exhaust temperature, the current exhaust temperature and the target exhaust temperature, so that the multi-connected air conditioning system runs stably, the valve over-adjustment and oscillation adjustment phenomenon is not easy to occur, the air outlet temperature fluctuation is small, and the condensation risk is reduced.

[0141] Fifth embodiment

[0142] With reference to ​ , based on the first embodiment to the fourth embodiment, in the fifth embodiment of the present application, the control method of the air conditioner of the present application comprises the following steps:

[0143] Step S410, determining the target exhaust temperature according to the current operating frequency of the compressor, the outdoor environment temperature, the set outlet water temperature and the temperature compensation constant.

[0144] Optionally, the set outlet water temperature can be set according to the actual situation. The temperature compensation constant can also be determined according to the actual situation. The target exhaust temperature can be determined according to the sum of the current operating frequency of the compressor, the outdoor environment temperature, the set outlet water temperature and the temperature compensation constant.

[0145] Optionally, in order to make the acquired target exhaust temperature more accurate, the current operating frequency of the compressor, the outdoor ambient temperature, the set water outlet temperature and the temperature compensation constant are acquired; the frequency correlation coefficient is determined according to the current operating frequency of the compressor, the temperature correlation coefficient is determined according to the outdoor ambient temperature, and the set temperature correlation coefficient is determined according to the set water outlet temperature; the target exhaust temperature is determined according to the current operating frequency and the frequency correlation coefficient, the outdoor ambient temperature and the temperature correlation coefficient, the set water outlet temperature and the set temperature correlation coefficient, and the temperature compensation parameter. Wherein, the frequency correlation coefficient, the set temperature correlation coefficient and the temperature correlation coefficient can be set according to actual conditions. The operating frequency of the compressor, the outdoor ambient temperature and the set water outlet temperature can be divided into multiple intervals in advance, and a corresponding preset correlation coefficient is set for each interval. Therefore, the interval in which the current operating frequency of the compressor is located can be determined, and the preset frequency correlation coefficient associated with the interval is determined as the frequency correlation coefficient corresponding to the current operating frequency of the compressor. The interval in which the current outdoor ambient temperature is located can be determined, and the preset outdoor ambient temperature associated with the interval is determined as the temperature correlation coefficient corresponding to the current outdoor ambient temperature. The interval in which the current set water outlet temperature is located can be determined, and the preset set temperature correlation coefficient associated with the interval is determined as the set temperature correlation coefficient corresponding to the current set water outlet temperature.

[0146] Exemplarily, the formula used by the target operating exhaust is: Tp_trg=a1*Fr+a2*T4+a3*Ts+a4.

[0147] Fr: the current operating frequency of the compressor;

[0148] a1: the frequency correlation coefficient, the recommended value is 0.5, and the range is 0.1-1.0;

[0149] T4: the outdoor ambient temperature, if T4<0, it is processed as T4=0 to prevent the target exhaust calculation from being too low;

[0150] a2: the temperature correlation coefficient of the outdoor ambient temperature, the recommended value is 0.5, and the range is 0.1-1.0;

[0151] Ts: the set water outlet temperature, generally in the range of 10-60℃;

[0152] a3: the set temperature correlation coefficient, the recommended value is 0.5, and the range is 0.1-1.0;

[0153] a4: the temperature compensation constant, the recommended value is 0, and the range is-20-20; different values are set according to the temperature interval of T4.

[0154] Step S110, acquiring the current exhaust temperature of the compressor in the outdoor unit and determining the target exhaust temperature.

[0155] In step S120, a control parameter of a throttling device in the air conditioner is determined according to at least one of a temperature difference between the current exhaust temperature and the target exhaust temperature and an operating parameter of the air conditioner, the control parameter including an adjustment step number and / or an adjustment period.

[0156] In step S130, the throttling device is controlled according to the control parameter.

[0157] According to the above technical solution, the target exhaust temperature is determined according to the current operating frequency of the compressor, the outdoor environment temperature, the set outlet water temperature and the temperature compensation constant, so that the determination of the target exhaust temperature is associated with the current operating frequency, the outdoor environment temperature, the set outlet water temperature and the temperature compensation constant, and the accuracy of the determined target exhaust temperature is improved.

[0158] The embodiments of the control method of the air conditioner are provided, and it should be noted that although the logical sequence is shown in the flowchart, in some cases, the steps shown or described can be executed in an order different from that shown.

[0159] Based on the same inventive concept, the embodiments of the present application also provide a computer readable storage medium, which stores an air conditioner control program, the air conditioner control program is executed by a processor to realize each step of the air conditioner control method as described above, and the same technical effect can be achieved, to avoid repetition, which will not be described here.

[0160] The storage medium provided by the embodiments of the present application is the storage medium used to implement the method of the embodiments of the present application, so based on the method introduced in the embodiments of the present application, the specific structure and modification of the storage medium can be understood by those skilled in the art, so here will not be described. Any storage medium used by the method of the embodiments of the present application belongs to the scope of the present application.

[0161] It should be noted that in this document, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements not only includes those elements, but also includes other elements not explicitly listed, or includes elements inherent to such process, method, article or system. Without more limitations, the element defined by the statement "including a" does not exclude the presence of additional identical elements in the process, method, article or system including the element.

[0162] The above-mentioned serial numbers of the embodiments of the present application are only for description, and do not represent the advantages and disadvantages of the embodiments.

[0163] Those skilled in the art can clearly understand the above-mentioned embodiment method can be realized by means of software and the necessary general hardware platform, of course, also can be through hardware, but in many cases the former is the better embodiment. Based on such understanding, the technical solutions of the present application essentially or say the part of the prior art contribution can be embodied in the form of software products, the computer software product is stored in a storage medium (such as ROM / RAM, magnetic disc, optical disc) as described above, including a number of instructions to make a terminal device (may be a mobile phone, computer, server, television, or network equipment, etc.) executes the method described in various embodiments of the present application.

[0164] The above is only the preferred embodiment of the present application, not therefore limit the patent scope of the present application, any equivalent structure or equivalent flow transformation made by using the content of the present application specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present application.

Claims

1. A control method of an air conditioner, characterized by, The air conditioner comprises an outdoor unit, at least one indoor unit and a hydraulic module, the indoor unit and the hydraulic module are connected to the outdoor unit, the hydraulic module and the indoor unit are connected in parallel, and a control method of the air conditioner comprises: obtaining a current discharge temperature of a compressor in the outdoor unit and determining a target discharge temperature; determining a control parameter of a throttling device in the air conditioner according to at least one of a temperature difference between the current discharge temperature and the target discharge temperature and an operating parameter of the air conditioner, the control parameter comprising an adjustment step and / or an adjustment period; controlling the throttling device according to the control parameter; wherein the operating parameter comprises a current operating frequency of the compressor and a current water temperature, and the step of determining the control parameter of the throttling device in the air conditioner according to at least one of the temperature difference between the current discharge temperature and the target discharge temperature and the operating parameter of the air conditioner comprises: determining a first correction coefficient according to the current operating frequency of the compressor, the greater the current operating frequency, the greater the first correction coefficient; determining a second correction coefficient according to the current water temperature, the greater the current water temperature, the greater the second correction coefficient; determining a third correction coefficient according to the temperature difference, wherein when the temperature difference is greater than a preset temperature value, the greater the temperature difference, the greater the third correction coefficient, and when the temperature difference is less than the preset temperature value, the greater the absolute value of the temperature difference, the greater the absolute value of the third correction coefficient; obtaining a modified current adjustment step based on the product of the first correction coefficient, the second correction coefficient, the third correction coefficient and the current adjustment step, and taking the modified current adjustment step as the adjustment step of the throttling device in the air conditioner.

2. The control method of the air conditioner according to claim 1, wherein The operating parameter comprises a current discharge temperature of the compressor, and the step of determining the control parameter of the throttling device in the air conditioner according to at least one of the temperature difference between the current discharge temperature and the target discharge temperature and the operating parameter of the air conditioner comprises: determining an adjustment period of the throttling device in the air conditioner according to the current discharge temperature of the compressor and / or the temperature difference.

3. The control method of the air conditioner according to claim 2, wherein The step of determining the adjustment period of the throttling device in the air conditioner according to the current discharge temperature of the compressor and / or the temperature difference comprises: determining a fourth correction coefficient according to the current discharge temperature of the compressor, the higher the current discharge temperature, the smaller the fourth correction coefficient; determining a fifth correction coefficient according to the temperature difference; correcting a current adjustment period based on the fourth correction coefficient and / or the fifth correction coefficient, and taking the modified current adjustment period as the adjustment period of the throttling device in the air conditioner.

4. The control method of the air conditioner according to claim 3, wherein The step of determining the fifth correction coefficient according to the temperature difference comprises: obtaining an absolute value of the temperature difference; determining the fifth correction coefficient according to the absolute value of the temperature difference, the greater the absolute value of the temperature difference, the smaller the fifth correction coefficient.

5. The control method of the air conditioner according to claim 1, wherein The control method of the air conditioner further comprises: determining the target discharge temperature according to a current operating frequency of the compressor, an outdoor environment temperature, a set outlet water temperature and a temperature compensation constant.

6. The control method of the air conditioner according to claim 5, wherein The step of determining the target discharge temperature according to the current operating frequency of the compressor, the outdoor ambient temperature, the set outlet water temperature and the temperature compensation constant comprises: obtaining the current operating frequency of the compressor, the outdoor ambient temperature, the set outlet water temperature and the temperature compensation constant; determining a frequency correlation coefficient according to the current operating frequency of the compressor, determining a temperature correlation coefficient according to the outdoor ambient temperature, and determining a set temperature correlation coefficient according to the set outlet water temperature; determining the target discharge temperature according to the current operating frequency and the frequency correlation coefficient, the outdoor ambient temperature and the temperature correlation coefficient, the set outlet water temperature and the set temperature correlation coefficient, and the temperature compensation constant.

7. An air conditioner characterized by comprising: The air conditioner comprises a memory, a processor and an air conditioner control program stored in the memory and capable of running on the processor, and the air conditioner control program, when executed by the processor, implements the steps of the air conditioner control method according to any one of claims 1-6.

8. A computer-readable storage medium, characterized in that, The computer readable storage medium stores an air conditioner control program, and the air conditioner control program, when executed by a processor, implements the steps of the air conditioner control method according to any one of claims 1-6.

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