Air conditioner control method, device, equipment and storage medium

Abstract

The present invention relates to the technical field of air conditioners, and in particular to an air conditioner control method, device, equipment and storage medium. The present invention determines the control priority of the air conditioner indoor unit and the hydraulic module by judging the current energy demand category of the multi-split air conditioner, so as to avoid the outdoor unit needing to provide more refrigerant at the same time, achieve a higher heating effect, and reduce the load of the outdoor unit at the same time. At the same time, the opening change value of each throttling element is calculated according to the control priority combined with the equipment temperature of the air conditioner and the outdoor ambient temperature, so as to achieve accurate refrigerant distribution and improve the configuration rate of the outdoor unit, thereby avoiding the technical problem of the prior art that the configuration rate of the air conditioner outdoor unit is high when there are multiple energy demands at the same time, and it is difficult to meet the user's usage needs, thereby improving the heating efficiency.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to an air conditioner control method, device, equipment and storage medium. Background Art

[0002] Multi-split air conditioners are generally equipped with several indoor air conditioner units and one or more hydraulic modules. The indoor air conditioner units are used to adjust the room temperature, and the hydraulic modules are used to produce hot water or floor heating. In this field, there are relatively mature solutions for controlling single load demands. However, when multiple load demands exist at the same time, the configuration rate of the outdoor air conditioner units will exceed 200%, making it difficult to control each demand, seriously affecting the user experience.

[0003] The above content is only used to assist in understanding the technical solution of the present invention and does not constitute an admission that the above content is prior art. Summary of the Invention

[0004] The main purpose of the present invention is to provide an air conditioner control method, device, equipment and storage medium, aiming to solve the technical problem that when the existing multi-split air conditioner has multiple energy needs at the same time, the configuration rate of the air conditioner outdoor unit is high and it is difficult to meet the user's usage needs.

[0005] To achieve the above-mentioned object, the present invention provides an air conditioner control method, the air conditioner control method being applied to a multi-split heating air conditioner, the multi-split heating air conditioner comprising an outdoor unit, a plurality of indoor air conditioners, and a hydraulic module, wherein a throttling element is provided between the outdoor unit and each indoor air conditioner and the hydraulic module;

[0006] The method comprises the following steps:

[0007] When it is detected that the air conditioner has multiple heating demands, determining the control priority of the air conditioner indoor unit and the hydraulic module according to each heating demand;

[0008] Acquire the device temperature of the air conditioner and the outdoor ambient temperature of the area where the outdoor unit is located;

[0009] determining an opening change value of each throttling element according to the equipment temperature of the air conditioner, the outdoor ambient temperature, and the control priority;

[0010] The opening of each throttling element is adjusted according to the opening change value.

[0011] Optionally, a first throttling element is provided between the outdoor unit and each indoor unit of the air conditioner, a second throttling element is provided between the outdoor unit and the hydraulic module, the opening change value includes a first opening change value corresponding to the first throttling element and a second opening change value corresponding to the second throttling element, and the hydraulic module includes a water tank;

[0012] The step of determining the opening change value of each throttling element according to the equipment temperature of the air conditioner, the outdoor ambient temperature, and the control priority includes:

[0013] When the priority of the hydraulic module is higher than the priority of the air conditioner indoor unit, obtaining the outlet water temperature of the water tank;

[0014] When the outlet water temperature is higher than a preset first temperature threshold, determining a first opening change value of the first throttling element according to the device temperature;

[0015] A second opening change value of the second throttling element is determined according to the temperature range of the outdoor ambient temperature.

[0016] Optionally, the external unit includes a compressor, and the device temperature includes the exhaust temperature of the compressor;

[0017] Determining the first opening change value of the first throttling element according to the device temperature includes:

[0018] Obtaining a current exhaust temperature of the compressor, a target exhaust temperature, and a first exhaust temperature and a second exhaust temperature of the compressor in a historical adjustment period, where the first exhaust temperature is the exhaust temperature in the previous adjustment period, and the second exhaust temperature is the exhaust temperature in the previous adjustment period;

[0019] A first opening change value of the first throttling element is calculated according to the first exhaust temperature, the second exhaust temperature, the current exhaust temperature, the target exhaust temperature and preset adjustment parameters.

[0020] Optionally, obtaining a target exhaust temperature includes:

[0021] Detecting whether a pressure sensor is provided at the compressor;

[0022] If so, obtaining the exhaust pressure of the compressor, and determining the target exhaust temperature according to the saturation temperature corresponding to the exhaust pressure and a preset first temperature correction value;

[0023] If not, the coil temperature of the compressor in the indoor unit of the air conditioner in the started state is obtained, and the target exhaust temperature is determined according to the average value of the coil temperature and a preset second temperature correction value.

[0024] Optionally, after obtaining the outlet water temperature of the hydraulic module, the method further includes:

[0025] When the outlet water temperature is not higher than a preset first temperature threshold, the first throttling element is closed.

[0026] Optionally, the air conditioner indoor unit includes an indoor heat exchanger, and the equipment temperature also includes the outlet water temperature of the hydraulic module;

[0027] The step of determining the opening change value of each throttling element according to the equipment temperature of the air conditioner, the outdoor ambient temperature, and the control priority includes:

[0028] When the priority of the air conditioner indoor unit is higher than the priority of the hydraulic module, determining a first opening change value of the first throttling element according to the current exhaust temperature of the compressor;

[0029] A second opening change value of the second throttling element is determined according to the outlet water temperature.

[0030] Optionally, the hydraulic module further includes a water pump;

[0031] After determining the second opening change value of the second throttling element according to the outlet water temperature, the method further includes:

[0032] When the coil temperature is lower than a preset second temperature threshold, the rotation speed of the water pump is adjusted according to the temperature range of the coil temperature.

[0033] In addition, to achieve the above-mentioned object, the present invention further provides an air conditioner control device, the air conditioner control device comprising:

[0034] a judgment module, configured to, when detecting that the air conditioner has multiple heating demands, judge the control priority of the air conditioner indoor unit and the hydraulic module according to each heating demand;

[0035] An acquisition module, configured to acquire the device temperature of the air conditioner and the outdoor ambient temperature of the area where the outdoor unit is located;

[0036] a calculation module, configured to determine an opening change value of each throttling element according to the equipment temperature of the air conditioner, the outdoor ambient temperature, and the control priority;

[0037] The adjustment module is used to adjust the opening of each throttling element according to the opening change value.

[0038] In addition, to achieve the above-mentioned purpose, the present invention also proposes an air conditioner control device, which includes: a memory, a processor, and an air conditioner control program stored on the memory and runnable on the processor, and the air conditioner control program is configured to implement the steps of the air conditioner control method described above.

[0039] In addition, to achieve the above-mentioned purpose, the present invention further proposes a storage medium, on which an air conditioner control program is stored. When the air conditioner control program is executed by a processor, the steps of the air conditioner control method described above are implemented.

[0040] The present invention determines the control priority of the indoor unit of the air conditioner and the hydraulic module by judging the current energy demand category of the multi-split air conditioner, so as to avoid the outdoor unit needing to provide more refrigerant at the same time, achieve a higher heating effect, and reduce the load of the outdoor unit at the same time. At the same time, the opening change value of each throttling element is calculated according to the control priority combined with the equipment temperature of the air conditioner and the outdoor ambient temperature, so as to achieve accurate refrigerant distribution and improve the configuration rate of the outdoor unit, avoiding the technical problem of the prior art that the configuration rate of the outdoor unit of the air conditioner is high when there are multiple energy demands at the same time, and it is difficult to meet the user's usage needs, thereby improving the heating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 1 is a schematic structural diagram of an air conditioner control device in a hardware operating environment according to an embodiment of the present invention;

[0042] Figure 2 1 is a flow chart of a first embodiment of an air conditioner control method according to the present invention;

[0043] Figure 3 A schematic structural diagram of a multi-split air conditioner according to an embodiment of an air conditioner control method of the present invention;

[0044] Figure 4 1. It is a flow chart of a second embodiment of the air conditioner control method of the present invention;

[0045] Figure 5 1. It is a flow chart of a third embodiment of the air conditioner control method of the present invention;

[0046] Figure 6 FIG. 1 is a structural block diagram of a first embodiment of an air conditioner control device according to the present invention.

[0047] Description of Figure Numbers:

[0048] Label name Label name 1 outdoor unit 16 pressure valve 2 Air conditioner indoor unit 31 Water side heat exchanger 3 Hydraulic module 32 water pump 11 compressor 33 Manual valve 12 Vapor-liquid separator 34 Electric auxiliary heating device 13 Four-way valve 35 Reversing device 14 Outdoor heat exchanger 36 water tank 15 Throttling element 37 Heating coil

[0049] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments. DETAILED DESCRIPTION

[0050] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0051] Reference Figure 1 , Figure 1 This is a schematic diagram of the structure of an air conditioner control device in the hardware operating environment involved in the embodiment of the present invention.

[0052] like Figure 1As shown, the air conditioner control device 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 realize the connection and communication between these components. The user interface 1003 may include a display screen (Display), an input unit such as a keyboard (Keyboard), and the user interface 1003 may optionally include a standard wired interface and a wireless interface. The network interface 1004 may optionally include a standard wired interface and a wireless interface (such as a wireless fidelity (Wi-Fi) interface). The memory 1005 may be a high-speed random access memory (Random Access Memory, RAM) or a stable non-volatile memory (Non-Volatile Memory, NVM), such as a disk storage. The memory 1005 may also be a storage device independent of the aforementioned processor 1001.

[0053] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the air conditioner control device, and may include more or fewer components than shown in the figure, or combine certain components, or arrange the components differently.

[0054] like Figure 1 As shown, the memory 1005 as a storage medium may include an operating system, a network communication module, a user interface module and an air conditioner control program.

[0055] exist Figure 1 In the air conditioner control device 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 conditioner control device of the present invention can be set in the air conditioner control device, and the air conditioner control device calls the air conditioner control program stored in the memory 1005 through the processor 1001, and executes the air conditioner control method provided by the embodiment of the present invention.

[0056] The embodiment of the present invention provides an air conditioner control method, referring to Figure 2 , Figure 2 FIG. 1 is a flow chart of a first embodiment of an air conditioner control method according to the present invention.

[0057] In this embodiment, the air conditioner control method includes the following steps:

[0058] Step S10: When it is detected that the air conditioner has multiple heating demands, the control priority of the air conditioner indoor unit and the hydraulic module is determined according to each heating demand.

[0059] It should be noted that the execution subject of this embodiment may be the air conditioner device, which has functions such as data processing, data communication, and program execution. The air conditioner device may be a controller for a multi-split air conditioner. Of course, other devices with similar functions may also be used, and these implementation conditions do not limit this. For ease of explanation, this embodiment uses a controller for a multi-split air conditioner as an example.

[0060] It is worth noting that the air conditioner in this embodiment refers to a multi-split air conditioner. A multi-split air conditioner is an air conditioner in which an external unit is connected to multiple internal units, and can simultaneously adjust parameters such as air temperature, humidity, cleanliness and air flow rate in multiple rooms, including but not limited to cooling, heating and fresh air circulation modes.

[0061] It should be noted that the reference Figure 3 , the multi-split air conditioner in this embodiment includes an outdoor unit, an air-conditioning indoor unit and a hydraulic module, the outdoor unit is respectively connected to each air-conditioning indoor unit and the hydraulic module, the outdoor unit 1 includes: a compressor 11, a vapor-liquid separator 12, a four-way valve 13, an outdoor heat exchanger 14, a throttling element 15 and the pressure valve 16, wherein the throttling element 15 includes a main capillary tube and a plurality of electronic expansion valves, the number of throttling elements 15 corresponds to the sum of the number of air-conditioning indoor units 2 connected to the outdoor unit and the number of hydraulic modules 3 plus one, that is, the sum of the number of main capillaries and the number of branches, and an electronic expansion valve is provided on the branch corresponding to each air-conditioning indoor unit 2 and the branch corresponding to the hydraulic module 3. In this embodiment, the throttling element opening adjusted refers to the opening of the electronic expansion valve. In this application, a throttling element with the same or similar function, such as an expansion tube or a throttling valve, can also be used instead of the electronic expansion valve. This embodiment does not impose specific restrictions on this.

[0062] It can be understood that in the multi-split air conditioner of this embodiment, the output end of the compressor 11 is connected to the first connecting port of the four-way valve 13, and is connected to the pressure valve 16 (low-pressure valve) through the second connecting port of the four-way valve 13, so as to facilitate the delivery to the air-conditioning indoor unit 2 or the hydraulic module 3 for heat exchange. After the heat exchange is completed, it returns to the electronic expansion valve through the pressure valve 16 (high-pressure valve), and is then delivered to the outdoor heat exchanger 14 through the main capillary for evaporation and heat absorption. At this time, the outdoor heat exchanger 14 is used as an evaporator, and finally flows through the third connecting port and the fourth connecting port of the four-way valve 13 through the vapor-liquid separator 12 and returns to the compressor 11 for the next heating. The number of high-pressure valves is twice the number of electronic expansion valves.

[0063] In addition, the hydraulic module in this embodiment includes: a heat exchange module, a reversing device, a first water path and a second water path, wherein the reversing device can be a three-way valve, and the heat exchange module includes: a water side heat exchanger 31, a water pump 32, a manual valve 33 and an electric auxiliary heating device 34, wherein the manual valve 33 can be a manual ball valve, or other devices with the same or similar switching valve functions, the water side input end of the water side heat exchanger 31 is connected to the output end of the water pump 32, the water side output end of the water side heat exchanger 31 is connected to the electric auxiliary heating device 34, and the refrigerant side input end of the water side heat exchanger 31 is connected to the The pressure valve 16 in the outdoor unit 1 is connected, the refrigerant side output end of the water side heat exchanger 31 is connected to the electronic expansion valve of the outdoor unit 1, the input end of the water pump 32 is connected to the first end of the first manual valve, and the second end of the first manual valve can be connected to the water tank 36 or the heating coil 37 according to different water channels. The output end of the electric auxiliary heating device 34 is connected to the first end of the second manual valve, and the second end of the second manual valve is connected to the first end of the reversing device 35. The reversing device 35 is connected to the water tank 36 or the heating coil 37 of the first water channel according to different water channels.

[0064] In this embodiment, the water path in the hydraulic module is divided into a first water path and a second water path according to different needs, wherein the first water path and the second water path are connected to the heat exchange module through a reversing device. When hot water is required, the normally open end of the three-way valve is connected to the first selection end, so that the water-side heat exchanger, water pump, electric auxiliary heating device, manual valve, three-way valve and water tank constitute the first water path to meet the hot water requirement; when heating is required, the normally open end of the three-way valve is connected to the second selection end, so that the water-side heat exchanger, water pump, electric auxiliary heating device, manual valve, three-way valve and heating coil constitute the second water path to meet the floor heating requirement.

[0065] In the specific implementation, when the air conditioner indoor heating of the multi-split air conditioner is in operation, the refrigerant is compressed by the compressor to obtain high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant is transported to the indoor heat exchanger through the four-way valve for condensation and heat dissipation. After the indoor heat exchanger exchanges heat with the indoor environment, medium-temperature and high-pressure refrigerant is obtained. Then, through the throttling elements such as the electronic expansion valve and the main capillary tube mentioned above, low-pressure and medium-temperature refrigerant is obtained, which is transported to the outdoor heat exchanger for evaporation to obtain low-temperature and low-pressure refrigerant, and finally returns to the compressor through the four-way valve to complete the single heating process.

[0066] At the same time, when the multi-split air conditioner is running for floor heating, the refrigerant is compressed by the compressor to obtain high-temperature and high-pressure refrigerant, and the high-temperature and high-pressure refrigerant is transported to the water-side heat exchanger in the heat exchange module through the four-way valve for condensation and heat dissipation. The water-side heat exchanger acts as a condenser. After heat exchange with the water in the water-side heat exchanger, the outlet water temperature is greater than the inlet water temperature, thereby heating the water flowing through the water-side heat exchanger to obtain medium-temperature and high-pressure refrigerant. Then, through the throttling elements such as the electronic expansion valve and the main capillary mentioned above, low-pressure and medium-temperature refrigerant is obtained, which is transported to the outdoor heat exchanger for evaporation to obtain low-temperature and low-pressure refrigerant. Finally, it returns to the compressor through the four-way valve to complete a single heating process. At the same time, the heated water in the water channel is returned to the heating coil through the electric auxiliary heating device and the three-way valve to facilitate floor heating.

[0067] At the same time, when the multi-split air conditioner is running to make hot water, the refrigerant is compressed by the compressor to obtain high-temperature and high-pressure refrigerant. The high-temperature and high-pressure refrigerant is transported to the water-side heat exchanger in the heat exchange module through the four-way valve for condensation and heat dissipation. The water-side heat exchanger acts as a condenser. After heat exchange with the water in the water-side heat exchanger, the outlet water temperature is greater than the inlet water temperature, thereby heating the water flowing through the water-side heat exchanger to obtain medium-temperature and high-pressure refrigerant. Then, through the throttling elements such as the electronic expansion valve and the main capillary tube mentioned above, low-pressure and medium-temperature refrigerant is obtained, which is transported to the outdoor heat exchanger for evaporation to obtain low-temperature and low-pressure refrigerant, and finally returns to the compressor through the four-way valve to complete a single heating process. At the same time, the heated water in the water channel is returned to the water tank through the electric auxiliary heating device and the three-way valve to achieve hot water. At this time, if there is excess hot water, it can be stored in the water tank for next use.

[0068] It should be noted that the heating demands of the multi-split air conditioner in the method of this embodiment include: heating through the built-in mechanism of the air conditioner, making hot water through the hydraulic module, and heating the floor through the hydraulic module. Therefore, the existence of multiple heating demands of the air conditioner can refer to four scenarios: 1. Heating through the built-in mechanism of the air conditioner and making hot water through the hydraulic module, 2. Making hot water through the hydraulic module and heating the floor through the hydraulic module; 3. Heating through the built-in mechanism of the air conditioner and heating the floor through the hydraulic module; 4. Heating through the built-in mechanism of the air conditioner, making hot water through the hydraulic module, and heating the floor through the hydraulic module.

[0069] In a specific implementation, if a multi-split air conditioner has energy requirements for heating the air conditioner's internal unit and heating water with a hydraulic module, because when the user faces heating the air conditioner's internal unit and heating water with a hydraulic module, the water volume in the water tank is small and the temperature rises quickly, and the user needs hot water in a short time, so the priority of the hydraulic module is higher than the priority of the air conditioner's internal unit.

[0070] If the multi-split air conditioner has energy requirements for both hot water production by the hydraulic module and floor heating production by the hydraulic module, at this time both are operated by the hydraulic module for heating. The priority of the energy requirements of the two can be controlled by the three-way valve in the hydraulic module. The floor heating heats up slowly, and the water tank heats up quickly. The three-way valve preferentially connects to the first water path where the water tank is located. After the water tank reaches temperature, the three-way valve connects to the second water path where the heating coil is located, and the opening of the second throttling element can be increased.

[0071] If a multi-split air conditioner has energy requirements for heating the air conditioner indoor unit and heating the floor by the hydraulic module, both are for heating, and the floor heating heats up slowly, while the air conditioner indoor unit heats up relatively quickly. Therefore, the priority of the air conditioner indoor unit is higher than that of the hydraulic module.

[0072] If the energy requirements of a multi-split air conditioner are heating by the air conditioner indoor unit, heating water by the hydraulic module, and floor heating by the hydraulic module, the water tank can be allowed to heat first, and after the water tank reaches the temperature, it can be switched to heating by the air conditioner indoor unit, and finally floor heating. That is, the control priority of the hydraulic module is first higher than that of the air conditioner indoor unit, and then the control priority of the hydraulic module is lower than that of the air conditioner indoor unit. In this embodiment, among the three energy requirements of heating by the air conditioner indoor unit, heating water by the hydraulic module, and floor heating by the hydraulic module, the energy priority of heating water by the hydraulic module is higher than that of heating by the air conditioner indoor unit and higher than that of floor heating by the hydraulic module.

[0073] Step S20: Acquire the device temperature of the air conditioner and the outdoor ambient temperature of the area where the outdoor unit is located.

[0074] It can be understood that the equipment temperature of the air conditioner specifically includes the exhaust temperature at the outlet of the outdoor unit compressor and the coil temperature or the middle temperature of the indoor heat exchanger. At the same time, if there are multiple connected indoor units, or there are multiple indoor heat exchangers in a single indoor unit, the average of the coil temperatures of each indoor heat exchanger can be taken as the coil temperature of the indoor heat exchanger; the outdoor ambient temperature of the area where the outdoor unit is located can be the temperature collected by the temperature sensor or temperature sensing package installed on the outdoor unit casing, or it can be the temperature collected by the temperature sensing package at the outdoor heat exchanger in the outdoor unit. Among them, if there are multiple outdoor heat exchangers in the outdoor unit, the average of the temperatures collected by the temperature sensing packages at each outdoor heat exchanger can be taken as the outdoor ambient temperature to reduce the impact of the outdoor ambient temperature on the control scheme in this embodiment.

[0075] Step S30: determining the opening change value of each throttling element according to the equipment temperature of the air conditioner, the outdoor ambient temperature and the control priority.

[0076] It is understandable that when the priority of the indoor unit of the air conditioner is higher, without affecting the reliability of the entire machine, the first throttling element between the indoor and outdoor units of the air conditioner can be opened as much as possible to distribute more refrigerant to the indoor unit of the air conditioner. At the same time, the second throttling element between the hydraulic module and the outdoor unit can be controlled according to the average temperature of the coil of the indoor heat exchanger.

[0077] When the control priority of the hydraulic module is higher, the opening change corresponding to the first throttling element between the indoor and outdoor units of the air conditioner is determined by the exhaust temperature of the compressor; the second throttling element between the hydraulic module and the outdoor unit takes a fixed opening according to the size of the outdoor ambient temperature.

[0078] Step S40: adjusting the opening of each throttling element according to the opening change value.

[0079] It should be understood that when the control priority of the indoor unit of the air conditioner is higher than the control priority of the hydraulic module, the opening of the first throttling element between the indoor unit and the outdoor unit of the air conditioner can be increased, and the first throttling element between the indoor unit and the outdoor unit of the air conditioner and the second throttling element between the hydraulic module and the outdoor unit can also be increased, but the opening of the first throttling element is adjusted more to increase the amount of refrigerant flowing into the indoor unit of the air conditioner and accelerate the temperature rise efficiency of the indoor unit of the air conditioner.

[0080] Similarly, when the control priority of the indoor unit of the air conditioner is lower than that of the hydraulic module, the opening of the second throttling element between the hydraulic and outdoor units can be increased, and the first throttling element between the indoor unit and outdoor unit of the air conditioner and the second throttling element between the hydraulic module and the outdoor unit can also be increased, but the opening of the second throttling element is adjusted more to increase the amount of refrigerant flowing into the hydraulic module and accelerate the temperature rise efficiency of the water circuit in the hydraulic module.

[0081] The present invention determines the control priority of the indoor unit of the air conditioner and the hydraulic module by judging the current energy demand category of the multi-split air conditioner, so as to avoid the outdoor unit needing to provide more refrigerant at the same time, achieve a higher heating effect, and reduce the load of the outdoor unit at the same time. At the same time, the opening change value of each throttling element is calculated according to the control priority combined with the equipment temperature of the air conditioner and the outdoor ambient temperature, so as to achieve accurate refrigerant distribution and improve the configuration rate of the outdoor unit, avoiding the technical problem of the prior art that the configuration rate of the outdoor unit of the air conditioner is high when there are multiple energy demands at the same time, and it is difficult to meet the user's usage needs, thereby improving the heating efficiency.

[0082] refer to Figure 4 , Figure 4 FIG. 1 is a flow chart of a second embodiment of an air conditioner control method according to the present invention.

[0083] Based on the above first embodiment, in this embodiment, step S30 includes:

[0084] Step S301: When the priority of the hydraulic module is higher than the priority of the air conditioner indoor unit, the outlet water temperature of the water tank is obtained.

[0085] It should be noted that when the priority of the hydraulic module is higher than the priority of the air-conditioning indoor unit, it means that there must be an energy demand for the hydraulic module to make hot water at this time. The size of the outlet water temperature can be used to determine whether the water circuit temperature rise is too large. If the water circuit temperature rise of the hydraulic module is too large, the air conditioner can be controlled to only run the hydraulic module for heating, and turn off the air-conditioning indoor unit for heating. Specifically, the first throttling element between the outdoor unit and the air-conditioning indoor unit is turned off, and the second throttling element between the outdoor unit and the hydraulic module is opened. If the water circuit temperature rise of the hydraulic module is not large, the air-conditioning indoor unit can be operated, and the opening of the first throttling element can be controlled normally.

[0086] Step S302: When the outlet water temperature is higher than a preset first temperature threshold, a first opening change value of the first throttling element is determined according to the device temperature.

[0087] It is worth noting that the preset temperature threshold value ranges from 30° C. to 45° C., and this embodiment is described using 40° C. as an example.

[0088] When the outlet water temperature is greater than 40℃, the air conditioner can operate normally, and the opening change of the first throttling element is calculated by the exhaust temperature of the outdoor unit compressor; when the outlet water temperature is less than 40℃, the first throttling element between the outdoor unit and the indoor unit of the air conditioner is closed, the air conditioner energy demand is not recognized, and only the water conservancy module operates.

[0089] Furthermore, determining the first opening change value of the first throttling element according to the device temperature includes:

[0090] Obtaining a current exhaust temperature of the compressor, a target exhaust temperature, and a first exhaust temperature and a second exhaust temperature of the compressor in a historical adjustment period, where the first exhaust temperature is the exhaust temperature in the previous adjustment period, and the second exhaust temperature is the exhaust temperature in the previous adjustment period;

[0091] A first opening change value of the first throttling element is calculated according to the first exhaust temperature, the second exhaust temperature, the current exhaust temperature, the target exhaust temperature and preset adjustment parameters.

[0092] It should be noted that, in order to accurately control the opening of the throttling element in this embodiment, the PID algorithm is used in combination with the exhaust temperature of the compressor to control the opening of the first throttling element corresponding to the indoor unit of the air conditioner. Specifically, the current exhaust temperature, the first exhaust temperature and the second exhaust temperature of the compressor in the historical adjustment period are respectively used as proportional values, integral values ​​and differential values ​​to comprehensively calculate the opening change value of the first throttling element. Among them, the value range of the adjustment period is 20s to 180s, and this embodiment takes 45s as an adjustment period.

[0093] In a specific implementation, the current compressor exhaust temperature, the compressor exhaust temperature 45 seconds ago, and the compressor exhaust temperature 90 seconds ago are obtained and substituted into the following opening change calculation formula to calculate the opening change value of the first throttling element between the outdoor unit and the indoor unit of the air conditioner. The calculation formula for the opening change value of the first throttling element is as follows:

[0094] Δp=k p (TP(k)-TP(k-1))+ki(TP(k)-TP 目标 )+kd(TP(k)-2TP(k-1)+TP(k-2))

[0095] Wherein, Δp is the change in the opening degree of the first throttling element, which needs to be rounded after the calculation. If Δp is positive, it means that the first throttling element is opened wide, and if Δp is negative, it means that the first throttling element is closed narrowly; kp is the proportional adjustment parameter value; ki is the integral adjustment parameter value; kd is the integral adjustment parameter value; TP 目标 is the target exhaust temperature, TP(k) is the current exhaust temperature, TP(k-1) is the first exhaust temperature of the compressor in the historical adjustment period, and TP(k-2) is the second exhaust temperature of the compressor in the historical adjustment period.

[0096] In this embodiment, the target exhaust temperature is obtained based on whether a pressure sensor is present in the air conditioner. Further, obtaining the target exhaust temperature specifically includes:

[0097] Detecting whether a pressure sensor is provided at the compressor;

[0098] If so, obtaining the exhaust pressure of the compressor, and determining the target exhaust temperature according to the saturation temperature corresponding to the exhaust pressure and a preset first temperature correction value;

[0099] If not, the coil temperature of the compressor in the indoor unit of the air conditioner in the started state is obtained, and the target exhaust temperature is determined according to the average value of the coil temperature and a preset second temperature correction value.

[0100] It should be noted that when a pressure sensor is provided at the compressor, the exhaust pressure of the compressor is collected by the pressure sensor, and the saturation temperature corresponding to the exhaust pressure is determined by looking up the table, and then the target exhaust temperature of the compressor is determined. When a pressure sensor is provided at the compressor, the formula for obtaining the target exhaust temperature is:

[0101] TP 压力 =Td+c

[0102] Wherein, Td is the saturation temperature corresponding to the exhaust pressure, and c is the temperature constant, which ensures that the compressor does not have liquid backflow. The exhaust superheat temperature ranges from 15°C to 40°C, and is preferably 25°C.

[0103] In addition, when the compressor is not provided with a pressure sensor, the target exhaust temperature of the compressor is determined by the average value of the coil temperature of the indoor heat exchanger in the startup state. When the compressor is not provided with a pressure sensor, the formula for obtaining the target exhaust temperature is:

[0104] TP 压力 =T2 平均 +d

[0105] Among them, T2 平均 is the average coil temperature of the air conditioner indoor unit required by energy, d is a constant, and it is the exhaust superheat temperature that ensures that the compressor does not have liquid backflow. The value range is 15℃~35℃, and the preferred value is 25℃.

[0106] In a specific implementation, when the outlet water temperature is less than or equal to 40° C., the first throttling element is closed to shield the operation of the indoor unit of the air conditioner, and only the hydraulic module is in operation.

[0107] Step S303: determining a second opening change value of the second throttling element according to the temperature range of the outdoor ambient temperature.

[0108] It should be noted that when the control priority of the hydraulic module is higher than the control priority of the air-conditioning indoor unit, the opening control of the hydraulic module is a fixed opening control, and its opening is positively correlated with the temperature range of the outdoor ambient temperature, that is, when the outdoor ambient temperature is greater than the first temperature, the second opening change value corresponding to the second throttling element is the first opening; when the outdoor ambient temperature is less than or equal to the first temperature and greater than the second temperature, the second opening change value corresponding to the second throttling element is the second opening; when the outdoor ambient temperature is less than or equal to the second temperature and greater than the third temperature, the second opening change value corresponding to the second throttling element is The third opening; when the outdoor ambient temperature is less than or equal to the third temperature, the second opening change value corresponding to the second throttling element is the fourth opening, wherein the first temperature is greater than the second temperature, the second temperature is greater than the third temperature, the first temperature value range is 10-24°C, the second temperature value range is -5-10°C, the third temperature value range is -5--15°C, the first opening value range is 400-480 steps; the second opening value range is 250-480 steps; the third opening value range is 150-300 steps; the fourth opening value range is 100-200 steps.

[0109] For example: when the outdoor ambient temperature is 30°C, the second opening change value corresponding to the hydraulic module is 480 steps; when the outdoor ambient temperature is 10°C, the second opening change value corresponding to the hydraulic module is 300 steps; when the outdoor ambient temperature is 0°C, the second opening change value corresponding to the hydraulic module is 180 steps; when the outdoor ambient temperature is -15°C, the second opening change value corresponding to the hydraulic module is 120 steps. The above is only an example for illustration, and this embodiment does not impose any specific restrictions on this.

[0110] This embodiment prioritizes the hydraulic module over the air conditioner indoor unit, and first determines the water temperature to determine whether the energy demand of the air conditioner indoor unit needs to be shielded. If not, the approximate first opening change value of the first throttling element is determined according to the exhaust temperature of the compressor; the second opening change value of the second throttling element is determined according to the temperature range of the outdoor ambient temperature, thereby realizing the refrigerant distribution between the air conditioner indoor unit and the hydraulic module, improving the heat distribution of the air conditioner under various energy demands, and improving the temperature rise efficiency of the hydraulic module.

[0111] refer to Figure 5 , Figure 5 FIG. 4 is a flow chart of a third embodiment of an air conditioner control method according to the present invention.

[0112] Based on the above second embodiment, in this embodiment, step S30 further includes:

[0113] Step S301': when the priority of the indoor unit of the air conditioner is higher than the priority of the hydraulic module, a first opening change value of the first throttling element is determined according to the current exhaust temperature of the compressor.

[0114] It should be noted that when the priority of the air-conditioning indoor unit is higher than that of the hydraulic module, there is only the heating demand of the air-conditioning indoor unit and the heating demand of the floor heating. At this time, the first throttling element corresponding to the air-conditioning indoor unit is opened as wide as possible without affecting the reliability of the whole unit, so that more refrigerant is allocated to the air-conditioning indoor unit, and its opening change value is the same as the first opening change value of the first throttling element determined according to the current exhaust temperature of the compressor, the target exhaust temperature, and the first exhaust temperature and the second exhaust temperature in the historical adjustment period. No further introduction will be made here.

[0115] Step S302': determining a second opening change value of the second throttling element according to the outlet water temperature.

[0116] It is worth noting that when the priority of the air conditioner indoor unit is higher than that of the hydraulic module, the opening of the second throttling element corresponding to the hydraulic module is adjusted. The PID algorithm can also be used in combination with the outlet water temperature of the hydraulic module for adjustment, that is, the outlet water temperature of the hydraulic module, the target outlet water temperature, and the first outlet water temperature and the second outlet water temperature of the indoor heat exchanger in the historical adjustment cycle are obtained, where the first outlet water temperature is the outlet water temperature of the previous adjustment cycle, and the second outlet water temperature is the outlet water temperature of the previous adjustment cycle before the first outlet water temperature;

[0117] A second opening change value of the second throttling element is calculated according to the first outlet water temperature, the second outlet water temperature, the current outlet water temperature, the target outlet water temperature and preset adjustment parameters.

[0118] It should be noted that, in order to accurately control the opening of the throttling element in this embodiment, the PID algorithm is used in combination with the outlet water temperature of the indoor heat exchanger to control the opening of the second throttling element corresponding to the indoor unit of the air conditioner. Specifically, the current outlet water temperature, the first outlet water temperature and the second outlet water temperature of the compressor in the historical adjustment period are used as proportional values, integral values ​​and differential values ​​to comprehensively calculate the opening change value of the second throttling element. The value range of the adjustment period is 15s to 200s, and this embodiment uses 30s as an adjustment period.

[0119] In a specific implementation, the current compressor outlet water temperature, the compressor outlet water temperature 30 seconds ago, and the compressor outlet water temperature 60 seconds ago are obtained and substituted into the following opening change calculation formula to calculate the opening change value of the second throttling element between the outdoor unit and the indoor unit of the air conditioner. The calculation formula for the opening change value of the second throttling element is as follows:

[0120] Δp=k p (T2(k)-T2(k-1))+ki(T2(k)-T2 目标)+kd(T2(k)-2T2(k-1)+T2(k-2))

[0121] Among them, Δp is the change in the opening of the second throttling element. It needs to be rounded after the calculation. If Δp is positive, it means that the second throttling element is opened wide, and if Δp is negative, it means that it is closed narrowly; kp is the proportional adjustment parameter value; ki is the integral adjustment parameter value; kd is the integral adjustment parameter value; T2 目标 is the target outlet water temperature, T2(k) is the current outlet water temperature, T2(k-1) is the first outlet water temperature of the indoor heat exchanger in the historical adjustment period, and T2(k-2) is the second outlet water temperature of the indoor heat exchanger in the historical adjustment period.

[0122] Furthermore, after determining the second opening change value of the second throttling element according to the outlet water temperature, the method further includes:

[0123] When the outlet water temperature is lower than a preset second temperature threshold, the rotation speed of the water pump is adjusted according to the temperature range of the outlet water temperature.

[0124] In a specific implementation, in a control scenario where the indoor unit of the air conditioner is prioritized, the refrigerant will be preferentially allocated to the indoor unit of the air conditioner. At this time, the second throttling element corresponding to the hydraulic module can be opened to the minimum opening. At the same time, when the outlet water temperature is lower than the preset second temperature threshold, the speed of the water pump in the hydraulic module is reduced. The preset second temperature threshold has a value range of 25-38°C and can be set to 33°C. This embodiment does not impose any specific restrictions on this.

[0125] In the specific implementation, when 20℃ is greater than or equal to the outlet water temperature and less than or equal to 30℃, the maximum output speed of the water pump of the hydraulic module is 25% of the rated speed; when the outlet water temperature T is less than 20℃, the water pump of the hydraulic module stops.

[0126] This embodiment determines the first opening change value of the first throttling element according to the current exhaust temperature of the compressor and determines the second opening change value of the second throttling element according to the coil temperature when the priority of the air-conditioning indoor unit is higher than that of the hydraulic module, thereby realizing the distribution of refrigerant between the air-conditioning indoor unit and the hydraulic module, improving the heat distribution of the air conditioner under various energy demands, and at the same time increasing the temperature efficiency of the air-conditioning indoor unit by adjusting the water pump speed of the hydraulic module.

[0127] In addition, an embodiment of the present invention further provides a storage medium on which an air conditioner control program is stored. When the air conditioner control program is executed by a processor, the steps of the air conditioner control method described above are implemented.

[0128] Since the storage medium adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0129] Reference Figure 6 , Figure 6 FIG. 1 is a structural block diagram of a first embodiment of an air conditioner control device according to the present invention.

[0130] like Figure 6 As shown, the air conditioner control device proposed in the embodiment of the present invention includes:

[0131] The judgment module 10 is used to judge the control priority of the indoor unit of the air conditioner and the hydraulic module according to each heating demand when it is detected that the air conditioner has multiple heating demands.

[0132] The acquisition module 20 is used to acquire the device temperature of the air conditioner and the outdoor ambient temperature of the area where the outdoor unit is located.

[0133] The calculation module 30 is used to determine the opening change value of each throttling element according to the equipment temperature of the air conditioner, the outdoor environment temperature and the control priority.

[0134] The adjustment module 40 is used to adjust the opening of each throttling element according to the opening change value.

[0135] In one embodiment, the calculation module 30 is further used to obtain the outlet water temperature of the water tank when the priority of the hydraulic module is higher than the priority of the air conditioner indoor unit; when the outlet water temperature is higher than a preset first temperature threshold, determine the first opening change value of the first throttling element according to the equipment temperature; and determine the second opening change value of the second throttling element according to the temperature range of the outdoor ambient temperature.

[0136] In one embodiment, the calculation module 30 is also used to obtain the current exhaust temperature of the compressor, the target exhaust temperature, and the first exhaust temperature and the second exhaust temperature of the compressor in a historical adjustment period, where the first exhaust temperature is the exhaust temperature of the previous adjustment period, and the second exhaust temperature is the exhaust temperature of the previous adjustment period of the first exhaust temperature; and the first opening change value of the first throttling element is calculated based on the first exhaust temperature, the second exhaust temperature, the current exhaust temperature, the target exhaust temperature, and the preset adjustment parameters.

[0137] In one embodiment, the calculation module 30 is further used to detect whether a pressure sensor is provided at the compressor; if so, the exhaust pressure of the compressor is obtained, and the target exhaust temperature is determined based on the saturation temperature corresponding to the exhaust pressure and a preset first temperature correction value; if not, the coil temperature of the compressor in the indoor unit of the air conditioner that is in the started state is obtained, and the target exhaust temperature is determined based on the average value of the coil temperature and a preset second temperature correction value.

[0138] In one embodiment, the calculation module 30 is further configured to close the first throttling element when the outlet water temperature is not higher than a preset first temperature threshold.

[0139] In one embodiment, the calculation module 30 is also used to determine the first opening change value of the first throttling element according to the current exhaust temperature of the compressor when the priority of the air-conditioning indoor unit is higher than the priority of the hydraulic module; and determine the second opening change value of the second throttling element according to the outlet water temperature.

[0140] In one embodiment, the calculation module 30 is further configured to adjust the rotation speed of the water pump according to the temperature range of the coil temperature when the coil temperature is lower than a preset second temperature threshold.

[0141] The present invention determines the control priority of the indoor unit of the air conditioner and the hydraulic module by judging the current energy demand category of the multi-split air conditioner, so as to avoid the outdoor unit needing to provide more refrigerant at the same time, achieve a higher heating effect, and reduce the load of the outdoor unit at the same time. At the same time, the opening change value of each throttling element is calculated according to the control priority combined with the equipment temperature of the air conditioner and the outdoor ambient temperature, so as to achieve accurate refrigerant distribution and improve the configuration rate of the outdoor unit, avoiding the technical problem of the prior art that the configuration rate of the outdoor unit of the air conditioner is high when there are multiple energy demands at the same time, and it is difficult to meet the user's usage needs, thereby improving the heating efficiency.

[0142] It should be understood that the above is only an example and does not constitute any limitation to the technical solution 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 limitation on this.

[0143] It should be noted that the workflow described above is merely illustrative and does not limit the scope of protection of the present invention. In practical applications, technicians in this field can select part or all of it according to actual needs to achieve the purpose of the embodiment scheme, and no limitation is made here.

[0144] In addition, for technical details not fully described in this embodiment, reference can be made to the air conditioner control method provided in any embodiment of the present invention, and will not be repeated here.

[0145] In addition, it should be noted that, in this document, the terms "comprises," "includes," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or system comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or system. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not exclude the presence of other identical elements in the process, method, article, or system comprising the element.

[0146] The serial numbers of the above embodiments of the present invention are for description only and do not represent the advantages or disadvantages of the embodiments.

[0147] Through the description of the above embodiments, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus the necessary general hardware platform, or of course by hardware, but in many cases the former is a better embodiment. 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. The computer software product is stored in a storage medium (such as a read-only memory (ROM) / RAM, a magnetic disk, or an optical disk), and includes a number of instructions for enabling a terminal device (which can be a mobile phone, a computer, a server, or a network device, etc.) to execute the methods described in each embodiment of the present invention.

[0148] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention description and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A method for controlling an air conditioner, characterized in that: The air conditioner control method is applied to a multi-split heating air conditioner, which includes an outdoor unit, multiple indoor air conditioners, and a hydraulic module, wherein a throttling element is provided between the outdoor unit and each indoor air conditioner and the hydraulic module; The air conditioner control method includes: When it is detected that the air conditioner has multiple heating demands, determining the control priority of the air conditioner indoor unit and the hydraulic module according to each heating demand; Obtaining the device temperature of the air conditioner and the outdoor ambient temperature of the area where the outdoor unit is located, the device temperature includes the exhaust temperature of the compressor, the outlet water temperature of the hydraulic module, and the coil temperature or middle temperature of the indoor heat exchanger; determining the opening change value of each throttling element according to the equipment temperature of the air conditioner, the outdoor ambient temperature, and the control priority; and The opening of each throttling element is adjusted according to the opening change value.

2. The air conditioner control method according to claim 1, wherein: A first throttling element is provided between the outdoor unit and each indoor unit of the air conditioner, a second throttling element is provided between the outdoor unit and the hydraulic module, the opening change value includes a first opening change value corresponding to the first throttling element and a second opening change value corresponding to the second throttling element, and the hydraulic module includes a water tank; The step of determining the opening change value of each throttling element according to the equipment temperature of the air conditioner, the outdoor ambient temperature, and the control priority includes: When the priority of the hydraulic module is higher than the priority of the air conditioner indoor unit, obtaining the outlet water temperature of the water tank; When the outlet water temperature is higher than a preset first temperature threshold, determining a first opening change value of the first throttling element according to the device temperature; and A second opening change value of the second throttling element is determined according to the temperature range of the outdoor ambient temperature.

3. The air conditioner control method according to claim 2, wherein: The external unit includes a compressor, and the device temperature includes the exhaust temperature of the compressor; Determining the first opening change value of the first throttling element according to the device temperature includes: Obtaining a current exhaust temperature of the compressor, a target exhaust temperature, and a first exhaust temperature and a second exhaust temperature of the compressor in a historical adjustment period, where the first exhaust temperature is the exhaust temperature in the previous adjustment period, and the second exhaust temperature is the exhaust temperature in the previous adjustment period; as well as A first opening change value of the first throttling element is calculated according to the first exhaust temperature, the second exhaust temperature, the current exhaust temperature, the target exhaust temperature and preset adjustment parameters.

4. The air conditioner control method according to claim 3, wherein: Get the target exhaust temperature, including: Detecting whether a pressure sensor is provided at the compressor; If so, obtaining the exhaust pressure of the compressor, and determining the target exhaust temperature according to the saturation temperature corresponding to the exhaust pressure and a preset first temperature correction value; and If not, the coil temperature of the compressor in the indoor unit of the air conditioner in the started state is obtained, and the target exhaust temperature is determined according to the average value of the coil temperature and a preset second temperature correction value.

5. The air conditioner control method according to claim 2, wherein: After obtaining the outlet water temperature of the hydraulic module, the method further includes: When the outlet water temperature is not higher than a preset first temperature threshold, the first throttling element is closed.

6. The air conditioner control method according to any one of claims 1 to 5, characterized in that: The air conditioner indoor unit includes an indoor heat exchanger, and the equipment temperature also includes the outlet water temperature of the hydraulic module; The step of determining the opening change value of each throttling element according to the equipment temperature of the air conditioner, the outdoor ambient temperature, and the control priority includes: When the priority of the air conditioner indoor unit is higher than the priority of the hydraulic module, determining a first opening change value of the first throttling element according to the current exhaust temperature of the compressor; as well as A second opening change value of the second throttling element is determined according to the outlet water temperature.

7. The air conditioner control method according to claim 6, wherein: The hydraulic module also includes a water pump; After determining the second opening change value of the second throttling element according to the outlet water temperature, the method further includes: When the coil temperature is lower than a preset second temperature threshold, the rotation speed of the water pump is adjusted according to the temperature range of the coil temperature.

8. An air conditioner control device, characterized in that: The air conditioner is a multi-split air conditioner, comprising an outdoor unit, an indoor unit, and a hydraulic module, wherein the outdoor unit is connected to each indoor unit and the hydraulic module, and the air conditioner control device comprises: a judgment module, configured to, when detecting that the air conditioner has multiple heating demands, judge the control priority of the air conditioner indoor unit and the hydraulic module according to each heating demand; an acquisition module, configured to acquire the device temperature of the air conditioner and the outdoor ambient temperature of the area where the outdoor unit is located, wherein the device temperature includes the exhaust temperature of the compressor, the outlet water temperature of the hydraulic module, and the coil temperature or the middle temperature of the indoor heat exchanger; a calculation module, configured to determine an opening change value of each throttling element according to the equipment temperature of the air conditioner, the outdoor ambient temperature, and the control priority; The adjustment module is used to adjust the opening of each throttling element according to the opening change value.

9. An air conditioner control device, characterized in that: The air conditioner control device includes: a memory, a processor, and an air conditioner control program stored in the memory and executable on the processor, wherein the air conditioner control program is configured to implement the air conditioner control method according to any one of claims 1 to 7.

10. A storage medium, characterized in that: The storage medium stores an air conditioner control program, and when the air conditioner control program is executed by the processor, the air conditioner control method according to any one of claims 1 to 7 is implemented.

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