Water heating control method and device, multi-split air conditioner and storage medium

Abstract

The invention relates to the technical field of air conditioners, in particular to a water heating control method and device, a multi-split air conditioner and a storage medium. During heating operation of a hydraulic module, the current operation state of an electric auxiliary heating device in the hydraulic module is determined, and a corresponding electric heating control strategy is selected according to the current operation state; and finally, the operation state of the electric auxiliary heating device is adjusted based on the electric heating control strategy in combination with the outdoor environment temperature of the area where the air conditioner outdoor unit is located, the water tank temperature of the heating water tank and the set temperature, so that the electric heating water heating function in different environments is achieved, and the water heating efficiency is improved. The technical problems that in the prior art, electric heating control of a multi-split air conditioner is single, and energy consumption is high are solved, and energy consumption for heating water is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioners, and in particular to a hot water production control method and device, a multi-split air conditioner and a storage medium. Background Art

[0002] A multi-split air conditioner is generally equipped with several indoor air conditioner units and one or more hydraulic modules. The indoor air conditioner units are used to adjust the temperature of each room, and the hydraulic module is used to provide domestic hot water. In traditional technology, there are many scenarios where the indoor air conditioner units and hot water are turned on at the same time, and the effect of heating hot water is easily affected. Since the ambient temperature and operating time do not meet the conditions for turning on the heating, the heating effect of the hot water is affected. Therefore, an electric auxiliary heating device is also provided in the hydraulic module to assist in making hot water. However, the control of the electric heating mode is relatively simple, the energy consumption is high, and it cannot meet the user's usage needs.

[0003] The above contents are only used to assist in understanding the technical solution of the present invention and do not constitute an admission that the above contents are prior art. Summary of the invention

[0004] The main purpose of the present invention is to provide a hot water control method, device, multi-split air conditioner and storage medium, aiming to solve the technical problems of the prior art multi-split air conditioner in that the electric heating control is relatively simple and the energy consumption is high.

[0005] To achieve the above object, the present invention provides a hot water control method, which is applied to a multi-split air conditioner, the multi-split air conditioner comprising: an air conditioner outdoor unit, a plurality of air conditioner indoor units and a hydraulic module, the air conditioner outdoor unit is respectively connected to each air conditioner indoor unit and the hydraulic module, the hydraulic module comprises a hot water tank and an electric auxiliary heating device corresponding to the hot water tank, the electric auxiliary heating device is used to heat the hot water tank;

[0006] The method comprises the following steps:

[0007] When the hydraulic module is in heating operation, obtaining the outdoor ambient temperature of the area where the air conditioner outdoor unit is located, the water tank temperature of the hot water tank, and the set temperature;

[0008] Determining the current operating state of the electric auxiliary heating device;

[0009] The operating state of the electric auxiliary heating device is adjusted based on the electric heating control strategy corresponding to the current operating state, the outdoor ambient temperature, the water tank temperature and the set temperature.

[0010] Optionally, the water tank temperature includes: the upper temperature of the water tank and the lower temperature of the water tank;

[0011] The adjusting the operating state of the electric auxiliary heating device based on the electric heating control strategy corresponding to the current operating state, the outdoor ambient temperature, the water tank temperature and the set temperature includes:

[0012] When the current operation state is not started, obtaining the current built-in operation mode of the hot water tank;

[0013] Determine the maximum water tank temperature between the upper water tank temperature and the lower water tank temperature;

[0014] The electric auxiliary heating device is started according to the current built-in operation mode, the outdoor ambient temperature, the maximum water tank temperature and the set temperature until the maximum water tank temperature is greater than or equal to the first set temperature.

[0015] Optionally, the built-in operation mode of the hot water tank includes a hybrid mode;

[0016] The method of starting the electric auxiliary heating device according to the current built-in operation mode, the outdoor ambient temperature, the maximum water tank temperature and the set temperature includes:

[0017] Query the temperature of the heat pump water heating tank corresponding to the outdoor ambient temperature;

[0018] When the current built-in operating mode is a hybrid mode, determining a target temperature range of the outdoor ambient temperature;

[0019] Determine whether the temperature of the heat pump water tank, the upper temperature of the water tank, the lower temperature of the water tank or the maximum temperature of the water tank meets the start-up condition of the electric auxiliary heating device corresponding to the target temperature range;

[0020] If the conditions are met, the electric auxiliary heating device is started.

[0021] Optionally, the built-in operation mode of the water heating tank further includes an energy-saving mode and an electric heating mode;

[0022] The hot water production control method further includes:

[0023] When the current built-in operation mode is the energy-saving mode, the temperature of the heat pump water tank is lower than the set temperature, and the maximum temperature of the water tank is lower than the second set temperature, the heat pump unit is controlled to stop, and the electric auxiliary heating device is started, and the first set temperature is higher than the second set temperature;

[0024] When the current built-in operation mode is the electric heating mode and the maximum temperature of the water tank is less than the first set temperature, the electric auxiliary heating device is started.

[0025] Optionally, the hot water production control method further includes:

[0026] When the current operating state is forced compensation, obtaining an indoor unit operating mode of the air conditioner indoor unit;

[0027] Query the compensation starting water temperature corresponding to the indoor unit operation mode;

[0028] Determine a minimum water tank temperature between the water tank upper temperature and the water tank lower temperature;

[0029] The operating state of the electric auxiliary heating device is adjusted according to the compensation starting water temperature and the minimum value of the water tank temperature.

[0030] Optionally, adjusting the operating state of the electric auxiliary heating device according to the compensation starting water temperature and the minimum water tank temperature includes:

[0031] When the minimum water tank temperature is greater than the first compensation start water temperature, the heat pump unit is started, and the electric auxiliary heating device is started until the maximum water tank temperature is greater than or equal to the first set temperature;

[0032] When the minimum value of the water tank temperature is less than or equal to the first compensation starting water temperature, and greater than or equal to the second compensation starting water temperature, the current operating state of the electric auxiliary heating device is maintained, and the second compensation starting water temperature is less than the first compensation starting water temperature;

[0033] When the water tank temperature is lower than the second compensation starting water temperature, the electric auxiliary heating device is controlled to operate in a temperature rise mode.

[0034] Optionally, controlling the electric auxiliary heating device to operate in a temperature rise mode includes:

[0035] At preset intervals, obtaining the change difference of the minimum temperature of the water tank;

[0036] Determining the temperature rise effect of the hot water tank according to the temperature coefficient corresponding to the outdoor ambient temperature and the change difference;

[0037] The operating state of the electric auxiliary heating device is adjusted according to the judgment result.

[0038] In addition, to achieve the above-mentioned purpose, the present invention also provides a hot water production control device, the hot water production control device comprising:

[0039] An acquisition module is used to acquire the outdoor ambient temperature of the area where the air conditioner outdoor unit is located, the water tank temperature of the hot water tank, and the set temperature when the hydraulic module is in heating operation;

[0040] A determination module, used to determine the current operating state of the electric auxiliary heating device;

[0041] The adjustment module is used to adjust the operating state of the electric auxiliary heating device based on the electric heating control strategy corresponding to the current operating state, the outdoor ambient temperature, the water tank temperature and the set temperature.

[0042] In addition, to achieve the above-mentioned objectives, the present invention also proposes a multi-split air conditioner, which includes: a memory, a processor, and a hot water control program stored in the memory and executable on the processor, wherein the hot water control program is configured to implement the steps of the hot water control method described above.

[0043] In addition, to achieve the above objectives, the present invention further proposes a storage medium, on which a hot water production control program is stored, and when the hot water production control program is executed by a processor, the steps of the hot water production control method described above are implemented.

[0044] The present invention determines the current operating state of the electric auxiliary heating device in the hydraulic module when the hydraulic module is in heating operation, selects the corresponding electric heating control strategy according to the current operating state, and finally adjusts the operating state of the electric auxiliary heating device based on the electric heating control strategy in combination with the outdoor ambient temperature of the area where the air-conditioning outdoor unit is located, the water tank temperature of the hot water tank and the set temperature, so as to realize the electric heating hot water making function under different environments, improve the hot water making efficiency, avoid the technical problems of the prior art multi-split air conditioner with relatively single electric heating control and high energy consumption, and reduce the energy consumption of hot water making. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] Figure 1 It is a structural schematic diagram of a multi-split air conditioner in a hardware operating environment involved in an embodiment of the present invention;

[0046] Figure 2 This is a flow chart of a first embodiment of a hot water production control method of the present invention;

[0047] Figure 3 A schematic diagram of the structure of a multi-split air conditioner according to an embodiment of a hot water production control method of the present invention;

[0048] Figure 4 It is a flow chart of a second embodiment of a hot water production control method of the present invention;

[0049] Figure 5 It is a flow chart of a third embodiment of a hot water production control method of the present invention;

[0050] Figure 6 This is a structural block diagram of the first embodiment of the hot water production control device of the present invention.

[0051] Description of Figure Numbers:

[0052] Label name Label name 1 Air conditioner outdoor unit LA Hydraulic valve 2 Air conditioner indoor unit GA Air pressure valve 3 Hydraulic Module 121 The first reversing device 11 compressor 122 The second reversing device 12 Reversing device 31 Hot water tank 13 Outdoor heat exchanger EXV Electronic expansion valve

[0053] The realization of the purpose, functional features and advantages of the present invention will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0054] It should be understood that the specific embodiments described herein are only used to explain the present invention, and are not used to limit the present invention.

[0055] Reference Figure 1 , Figure 1 The present invention is a schematic diagram of the structure of a multi-split air conditioner in the hardware operating environment involved in the embodiment of the present invention.

[0056] like Figure 1 As shown, the multi-split air conditioner 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. Among them, 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 optional user interface 1003 may also 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 (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.

[0057] Those skilled in the art will understand that Figure 1 The structure shown in the figure does not constitute a limitation on the multi-split air conditioner, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0058] 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 a hot water control program.

[0059] exist Figure 1In the multi-split air conditioner 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 multi-split air conditioner of the present invention can be set in the multi-split air conditioner, and the multi-split air conditioner calls the hot water control program stored in the memory 1005 through the processor 1001, and executes the hot water control method provided by the embodiment of the present invention.

[0060] The embodiment of the present invention provides a hot water control method, referring to Figure 2 , Figure 2 It is a flow chart of a first embodiment of a hot water production control method of the present invention.

[0061] In this embodiment, the hot water production control method includes the following steps:

[0062] Step S10: When the hydraulic module is in heating operation, the outdoor ambient temperature of the area where the air conditioner outdoor unit is located, the water tank temperature of the hot water tank and the set temperature are obtained.

[0063] 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 running, and the air conditioner device may be a controller of a multi-split air conditioner. Of course, it may also be other devices with similar functions, and this implementation condition does not limit this. For the sake of convenience, this implementation mode is described by taking the controller of a multi-split air conditioner as an example.

[0064] It is worth noting that the air conditioner in this embodiment refers to a multi-split air conditioner. Figure 3 A multi-split air conditioner is an air conditioner with an external unit connected to multiple internal units, which can adjust parameters such as air temperature, humidity, cleanliness and air flow rate in multiple rooms at the same time, including but not limited to cooling, heating and fresh air circulation modes.

[0065] It should be noted that the multi-split air conditioner in this embodiment includes an outdoor air conditioner, an indoor air conditioner and a hydraulic module, wherein the outdoor air conditioner is respectively connected to each indoor air conditioner and the hydraulic module, wherein the outdoor air conditioner includes: a compressor, an outdoor heat exchanger and at least two reversing devices, wherein the indoor air conditioner includes at least one indoor heat exchanger, and a hot water tank is provided at the end of the hydraulic module, wherein each reversing device is connected to the compressor, and is mainly used to control the flow direction of the refrigerant in the multi-split air conditioner, and the reversing device can be a four-way valve or a three-way valve, and this embodiment does not impose specific restrictions on this.

[0066] In addition, throttling elements are provided between the air-conditioning outdoor unit and each air-conditioning indoor unit and the hydraulic module. In this embodiment, the throttling elements include a first throttling element corresponding to the indoor heat exchanger and a second throttling element corresponding to the hot water tank, wherein the throttling elements include an electronic expansion valve and a capillary tube, etc. In this embodiment, the electronic expansion valve is mainly used as an example for explanation, wherein the throttling elements between the air-conditioning outdoor unit and each air-conditioning indoor unit and the hydraulic module may include a main electronic expansion valve, and also include branch electronic expansion valves corresponding to each air-conditioning indoor unit or hydraulic module. This embodiment does not impose specific restrictions on this.

[0067] The hydraulic module heating operation in the multi-split air conditioner refers to the compression of the refrigerant by the compressor to obtain high-temperature and high-pressure refrigerant, which is transported to the hot water tank through a four-way valve. The hot water tank acts as a condenser. After heat exchange with the water path in the hot water tank, the outlet water temperature is greater than the inlet water temperature, thereby achieving heating. The refrigerant flows through the water path of the hot water tank to obtain medium-temperature and high-pressure refrigerant, and then passes through the throttling elements such as the electronic expansion valve and the main line capillary mentioned above to obtain low-pressure and medium-temperature refrigerant, which is transported to the outdoor heat exchanger for evaporation to obtain low-temperature and low-pressure refrigerant, which finally flows back to the compressor through the four-way valve to complete a single heating process. In addition, the heating of the hot water tank can also be achieved by an electric auxiliary heating device corresponding to the hot water tank.

[0068] However, in the scenario where energy demand exists simultaneously in the air conditioner indoor unit and the hydraulic module, since the heat pump system is running, especially when the air conditioner indoor unit is cooling, the water tank needs to be heated. At this time, since the hydraulic module and the air conditioner indoor unit are both used as evaporators, in order to achieve the purpose of heating the water tank, it is necessary to start the electric heating device, and the energy consumption of the heat pump unit and electric heating is too high.

[0069] It should be understood that the water tank temperature includes but is not limited to the upper temperature of the water tank and the lower temperature of the water tank. The temperature acquisition method mentioned in this embodiment can be obtained by temperature sensing packages installed respectively on the upper and lower parts of the water tank or other devices that can realize temperature acquisition. This embodiment does not impose specific restrictions on this.

[0070] Step S20: Determine the current operating state of the electric auxiliary heating device.

[0071] In this embodiment, the operating state of the electric auxiliary heating device includes unstarted, started, and forced compensation states. In this embodiment, according to the current operating state of the electric auxiliary heating device, it is divided into two types: ordinary electric heating control and electric heating compensation control.

[0072] Step S30: adjusting the operating state of the electric auxiliary heating device based on the electric heating control strategy corresponding to the current operating state, the outdoor ambient temperature, the water tank temperature and the set temperature.

[0073] In the specific implementation, the corresponding electric heating control strategy under different operating conditions can improve the hot water making effect of the heat pump system itself without affecting the hot water making efficiency, and reduce the energy consumption problem caused by electric heating.

[0074] This embodiment determines the current operating state of the electric auxiliary heating device in the hydraulic module when the hydraulic module is in heating operation, selects the corresponding electric heating control strategy according to the current operating state, and finally adjusts the operating state of the electric auxiliary heating device based on the electric heating control strategy in combination with the outdoor ambient temperature of the area where the air-conditioning outdoor unit is located, the water tank temperature of the hot water tank and the set temperature, so as to realize the electric heating hot water making function under different environments, improve the hot water making efficiency, avoid the technical problems of the prior art multi-split air conditioner that the electric heating control is relatively single and the energy consumption is high, and reduce the energy consumption of hot water making.

[0075] refer to Figure 4 , Figure 4 It is a flow chart of a second embodiment of a hot water production control method of the present invention.

[0076] Based on the first embodiment above, in this embodiment, step S301 includes:

[0077] Step S301: when the current operation state is not started, obtaining the current built-in operation mode of the hot water tank.

[0078] It should be noted that when the electric auxiliary heating device is started, the electric heating control strategy of the multi-split air conditioner is ordinary electric heating control. Under ordinary electric heating control, the activation of the electric auxiliary heating device is also affected by the built-in operating mode of the water heating tank, wherein the built-in operating mode of the water heating tank includes but is not limited to: energy-saving mode, electric heating mode and hybrid mode.

[0079] Step S302: Determine the maximum water tank temperature between the upper water tank temperature and the lower water tank temperature.

[0080] It is understandable that since the water temperature in the water tank may vary due to the influence of the heating by the refrigerant plate or the electric auxiliary heating device, in order to reduce the energy consumption of electric heating startup and improve the efficiency of hot water making, this embodiment adopts the maximum water tank temperature between the upper temperature of the water tank and the lower temperature of the water tank as the general judgment condition under each built-in operating mode to improve the efficiency of hot water making.

[0081] Step S303: starting the electric auxiliary heating device according to the current built-in operation mode, the outdoor ambient temperature, the maximum water tank temperature and the set temperature until the maximum water tank temperature is greater than or equal to the first set temperature.

[0082] It is worth noting that, in the normal control mode, the conditions for turning on the electric heating of the multi-split air conditioner are different in different built-in operation modes, but the judgment conditions for turning off the electric auxiliary heating and turning off the electric heating are that the maximum value of the water tank temperature between the upper temperature of the water tank and the lower temperature of the water tank is greater than or equal to the first set temperature. The first set temperature is a value determined according to the user's water tank set temperature. For example: the user needs 45°C hot water. When the maximum water temperature in the water tank is close to 45°C, the electric heating is turned off and the water tank is heated by the remaining heat of the refrigerant. In this embodiment, the first set temperature can be the water tank set temperature minus 1, and this embodiment does not impose specific restrictions on this.

[0083] Furthermore, when the current built-in operation mode of the water heating tank is the hybrid mode, the step of starting the electric auxiliary heating device according to the current built-in operation mode, the outdoor ambient temperature, the maximum water tank temperature and the set temperature specifically includes:

[0084] Query the temperature of the heat pump water heating tank corresponding to the outdoor ambient temperature;

[0085] When the current built-in operating mode is a hybrid mode, determining a target temperature range of the outdoor ambient temperature;

[0086] Determine whether the temperature of the heat pump water tank, the upper temperature of the water tank, the lower temperature of the water tank or the maximum temperature of the water tank meets the start-up condition of the electric auxiliary heating device corresponding to the target temperature range;

[0087] If the conditions are met, the electric auxiliary heating device is started.

[0088] It should be noted that the heat pump hot water tank temperature refers to the maximum water tank temperature that the hot water tank can heat when the multi-split air conditioner only runs the heat pump system, and the heat pump hot water tank temperature will be affected by the outdoor ambient temperature and there will be heat dissipation. Therefore, when determining the heat pump hot water tank temperature, the outdoor ambient temperature can be used to query the corresponding maximum water tank temperature that the hot water tank can heat when the multi-split air conditioner only runs the heat pump system. Specifically, the heat pump hot water tank temperature corresponding to the outdoor ambient temperature can be queried with reference to Table 1.

[0089] Table 1

[0090] T4 Ambient temperature T4＜-10℃ -10℃≤T4＜-5℃ -5℃≤T4＜5℃ 5℃≤T4＜25℃ TW-out≥25℃ TSTOP 45 50 55 50 45

[0091] It can be understood that the target temperature range of the outdoor ambient temperature is determined by the interval temperature value pre-divided in the hybrid mode, which can be specifically divided into the first interval of the hybrid mode (T4>Td), the second interval of the hybrid mode (Td≥T4≥Td-5) and the third interval of the hybrid mode (T4<Td-5), wherein Td refers to the interval temperature value pre-divided in the hybrid mode, for example: 25°C, and this embodiment does not impose any specific restrictions on this.

[0092] In a specific implementation, when the outdoor ambient temperature is greater than 25°C, it is detected whether the temperature of the heat pump hot water tank is less than the set temperature, and whether the maximum value of the water tank temperature between the upper temperature of the water tank and the lower temperature of the water tank is less than the third set temperature. The third set temperature is less than the first set temperature. For example, if the first set temperature is TS-1, the third set temperature is TS-2. That is, when the multi-split air conditioner only runs the heat pump system, the highest water tank temperature that the hot water tank can heat cannot meet the water tank hot water demand, and the hot water tank has not reached the temperature. At this time, the heat pump unit can be controlled to stop running, and the electric auxiliary heating device can be turned on to heat the water tank until the maximum water tank temperature is greater than or equal to the first set temperature, and the electric heating is exited.

[0093] When the outdoor ambient temperature is between 20-25°C, and when the outdoor unit running time reaches 30 minutes, and the upper temperature of the water tank is lower than the third set temperature and the lower temperature of the water tank is lower than the fourth set temperature, and the fourth set temperature is lower than the third set temperature, the reason for this setting is that the hot water in the water tank will accumulate in the upper part and the cold water will settle at the bottom, that is, when T5U<TS-2 and T5L<TS-6, the electric heating is turned on until MAX(T5L, T5U)≥TS-1 is met, and then the electric heating is turned off.

[0094] When the outdoor ambient temperature is less than 20°C, when the upper temperature of the water tank is less than the second set temperature and T5L<Min(TS-10, 30°C), the electric heating is turned on until MAX(T5L, T5U)≥TS-1 is met, and then the electric heating is turned off.

[0095] Furthermore, when the current built-in operation mode is the energy-saving mode, the temperature of the heat pump water tank is lower than the set temperature, and the maximum temperature of the water tank is lower than the second set temperature, the heat pump unit is controlled to stop, and the electric auxiliary heating device is started, and the first set temperature is higher than the second set temperature;

[0096] When the current built-in operation mode is the electric heating mode and the maximum temperature of the water tank is less than the first set temperature, the electric auxiliary heating device is started.

[0097] In the specific implementation, when the built-in operation mode of the hot water tank is energy-saving mode, and when the temperature of the heat pump hot water tank is lower than the set temperature of the water tank and the maximum temperature of the water tank is lower than TS-4, the heat pump unit stops running and the electric heating of the water tank is turned on to heat the water tank. For the electric heating of the water tank that has been turned on in energy-saving mode, when the heat pump unit starts running or MAX(T5L, T5U)≥TS-1 is met, the electric heating is turned off.

[0098] When the built-in operation mode of the water heating tank is the electric heating mode, and when the maximum temperature of the water tank is less than TS-4, the electric heating of the water tank is turned on to heat the water tank. If the electric heating mode has been turned on for the electric heating of the water tank, the electric heating is turned off when the heat pump unit starts running or MAX (T5L, T5U) ≥ TS-1.

[0099] This embodiment provides start-up conditions for the electric auxiliary heating device under different built-in operation modes of the water heating tank, adapts to different water heating conditions, reduces energy consumption caused by starting the electric heating, and improves the effect of water heating.

[0100] refer to Figure 5 , Figure 5 It is a flow chart of a third embodiment of a hot water production control method of the present invention.

[0101] Based on the above second embodiment, in this embodiment, step S301 includes:

[0102] Step S301': when the current operation state is forced compensation, obtaining the indoor unit operation mode of the air conditioner indoor unit.

[0103] It should be noted that whether the current operating state of the hot water tank is forced compensation can be determined by the forced compensation flag of the hot water tank.

[0104] In a specific implementation, if a multi-split air conditioner starts the air-conditioning indoor unit and the hydraulic module at the same time, the output energy of the heat pump unit may be insufficient, affecting the heating or cooling effect of the air-conditioning indoor unit and the hydraulic module. This embodiment determines the starting temperature of the electric auxiliary heating device according to the operating mode of the air-conditioning indoor unit and the operating mode of the hot water tank in the multi-split air conditioner, thereby reducing the energy consumption of electric heating without affecting the hot water effect.

[0105] Step S302': query the compensation starting water temperature corresponding to the indoor unit operation mode.

[0106] In the specific implementation, the compensation starting water temperature corresponding to the indoor unit operation mode can be queried by referring to Table 2. As shown in Table 2, in the mode of single hydraulic module hot water production, the compensation starting water temperature H_temp is 50, in the mode of both hot water production and air-conditioning indoor unit heating, the compensation starting water temperature H_temp is 48, and in the mode of both hot water production and air-conditioning indoor unit cooling, the compensation starting water temperature H_temp is 45.

[0107] Table 2

[0108] Outdoor unit operation mode Hot water mode only Hot water + air conditioning heating Hot water + air conditioning H_temp(℃) 50 48 45

[0109] Step S303`: Determine the minimum water tank temperature between the upper water tank temperature and the lower water tank temperature.

[0110] It can be understood that in order to avoid the impact of low water temperature on the operation of the multi-split air conditioner when there are multiple demands at the same time, this embodiment uses the minimum water tank temperature to compare with the compensation starting water temperature core to determine whether it is necessary to start the electric auxiliary heating device, so as to avoid the situation where the compressor output energy demand is insufficient and affects the user's use.

[0111] Step S304`: adjusting the operating state of the electric auxiliary heating device according to the compensation starting water temperature and the minimum value of the water tank temperature.

[0112] Furthermore, the step of adjusting the operating state of the electric auxiliary heating device according to the compensation starting water temperature and the minimum water tank temperature specifically includes:

[0113] When the minimum water tank temperature is greater than the first compensation start water temperature, the heat pump unit is started, and the electric auxiliary heating device is started until the maximum water tank temperature is greater than or equal to the first set temperature;

[0114] When the minimum value of the water tank temperature is less than or equal to the first compensation starting water temperature, and greater than or equal to the second compensation starting water temperature, the current operating state of the electric auxiliary heating device is maintained, and the second compensation starting water temperature is less than the first compensation starting water temperature;

[0115] When the water tank temperature is lower than the second compensation starting water temperature, the electric auxiliary heating device is controlled to operate in a temperature rise mode.

[0116] In the specific implementation, when the minimum water tank temperature TW is greater than the first compensation starting water temperature H_temp: the electric heating compensation is turned on in the water tank, and the heat pump and electric heating are heated together until the maximum water tank temperature is greater than or equal to the first set temperature, and then the electric auxiliary heating is turned off; when the second compensation starting water temperature H_temp-2≤the minimum water tank temperature TW≤the first compensation starting water temperature H_temp, the zone is maintained to maintain the electric heating state for a range; when the minimum water tank temperature TW is less than the second compensation starting water temperature H_temp-2, the electric heating temperature rise judgment mode control is entered, and the electric heating is turned on according to the heating effect of the water tank.

[0117] Furthermore, in the forced compensation control mode, controlling the electric auxiliary heating device to operate in a temperature rise mode includes:

[0118] At preset intervals, obtaining the change difference of the minimum temperature of the water tank;

[0119] Determining the temperature rise effect of the hot water tank according to the temperature coefficient corresponding to the outdoor ambient temperature and the change difference;

[0120] The operating state of the electric auxiliary heating device is adjusted according to the judgment result.

[0121] It can be understood that the preset time length can be 10 minutes, that is, 10 minutes after the compressor is started, the change difference A of the temperature rise of the minimum water tank temperature TW is calculated every 10 minutes, and the change difference A is substituted into the temperature rise judgment formula 0≤10*change difference A≤temperature coefficient B℃ to judge the temperature rise effect of the hot water tank, where the correspondence between the outdoor ambient temperature and the temperature coefficient can be referred to Table 3.

[0122] Table 3

[0123] T4 Ambient temperature T4＜-10℃ -10℃≤T4＜-5℃ -5℃≤T4＜5℃ 5℃≤T4＜25℃ TW-out≥25℃ Coefficient B 10 15 15 20 25

[0124] In the specific implementation, when the change difference A of the temperature rise of the minimum water tank temperature TW satisfies 0≤10*minimum water tank temperature A≤temperature coefficient B, it is judged that the heating temperature rise of the heat pump unit is slow, and the water tank electric heating needs to be turned on to heat the water tank; when the maximum water tank temperature is less than the first set temperature or 10*minimum water tank temperature A>1.5*temperature coefficient B, the water tank temperature is close to reaching the temperature and the heating rate has been restored, then the electric heating is turned off.

[0125] This embodiment provides the start-up conditions of the electric auxiliary heating device under the forced compensation control of the water heating tank, which is suitable for different water heating conditions, reduces the energy consumption problem caused by the start-up of electric heating, and improves the effect of water heating.

[0126] In addition, an embodiment of the present invention further provides a storage medium, on which a hot water production control program is stored. When the hot water production control program is executed by a processor, the steps of the hot water production control method described above are implemented.

[0127] 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.

[0128] Reference Figure 6 , Figure 6 This is a structural block diagram of the first embodiment of the hot water production control device of the present invention.

[0129] like Figure 6 As shown, the hot water control device proposed in the embodiment of the present invention includes:

[0130] The acquisition module 10 is used to acquire the outdoor ambient temperature of the area where the air conditioner outdoor unit is located, the water tank temperature of the hot water tank and the set temperature when the hydraulic module is in heating operation.

[0131] The determination module 20 is used to determine the current operating state of the electric auxiliary heating device.

[0132] The adjustment module 30 is used to adjust the operating state of the electric auxiliary heating device based on the electric heating control strategy corresponding to the current operating state, the outdoor ambient temperature, the water tank temperature and the set temperature.

[0133] In one embodiment, the adjustment module 30 is further used to obtain the current built-in operation mode of the water heating tank when the current operation state is not started; determine the maximum water tank temperature between the upper temperature of the water tank and the lower temperature of the water tank; and start the electric auxiliary heating device according to the current built-in operation mode, the outdoor ambient temperature, the maximum water tank temperature and the set temperature until the maximum water tank temperature is greater than or equal to the first set temperature.

[0134] In one embodiment, the adjustment module 30 is further used to query the heat pump water heating tank temperature corresponding to the outdoor ambient temperature; when the current built-in operation mode is the hybrid mode, determine the target temperature range of the outdoor ambient temperature; judge whether the heat pump water heating tank temperature, the upper tank temperature, the lower tank temperature or the maximum tank temperature meets the start-up condition of the electric auxiliary heating device corresponding to the target temperature range; if so, start the electric auxiliary heating device.

[0135] In one embodiment, the adjustment module 30 is further used to control the heat pump unit to shut down and start the electric auxiliary heating device when the current built-in operation mode is the energy-saving mode, the temperature of the heat pump hot water tank is lower than the set temperature, and the maximum temperature of the water tank is lower than the second set temperature, and the first set temperature is higher than the second set temperature; when the current built-in operation mode is the electric heating mode and the maximum temperature of the water tank is lower than the first set temperature, start the electric auxiliary heating device.

[0136] In one embodiment, the adjustment module 30 is further used to obtain the indoor unit operation mode of the air conditioner indoor unit when the current operation state is forced compensation; query the compensation starting water temperature corresponding to the indoor unit operation mode; determine the minimum water tank temperature between the upper water tank temperature and the lower water tank temperature; and adjust the operation state of the electric auxiliary heating device according to the compensation starting water temperature and the minimum water tank temperature.

[0137] In one embodiment, the adjustment module 30 is further used to start the heat pump unit and the electric auxiliary heating device when the minimum value of the water tank temperature is greater than the first compensation starting water temperature, until the maximum value of the water tank temperature is greater than or equal to the first set temperature; when the minimum value of the water tank temperature is less than or equal to the first compensation starting water temperature, and greater than or equal to the second compensation starting water temperature, maintain the current operating state of the electric auxiliary heating device, and the second compensation starting water temperature is less than the first compensation starting water temperature; when the water tank temperature is less than the second compensation starting water temperature, control the electric auxiliary heating device to operate in a temperature rise mode.

[0138] In one embodiment, the adjustment module 30 is further used to obtain the change difference of the minimum value of the water tank temperature at intervals of a preset time; judge the temperature rise effect of the hot water tank according to the temperature coefficient corresponding to the outdoor ambient temperature and the change difference; and adjust the operating state of the electric auxiliary heating device according to the judgment result.

[0139] This embodiment determines the current operating state of the electric auxiliary heating device in the hydraulic module when the hydraulic module is in heating operation, selects the corresponding electric heating control strategy according to the current operating state, and finally adjusts the operating state of the electric auxiliary heating device based on the electric heating control strategy in combination with the outdoor ambient temperature of the area where the air-conditioning outdoor unit is located, the water tank temperature of the hot water tank and the set temperature, so as to realize the electric heating hot water making function under different environments, improve the hot water making efficiency, avoid the technical problems of the prior art multi-split air conditioner that the electric heating control is relatively single and the energy consumption is high, and reduce the energy consumption of hot water making.

[0140] It should be understood that, although the various steps in the flowchart in the embodiment of the present application are displayed in sequence according to the indication of the arrows, these steps are not necessarily performed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and it can be performed in other orders. Moreover, at least a portion of the steps in the figure may include a plurality of sub-steps or a plurality of stages, and these sub-steps or stages are not necessarily performed at the same time, but can be performed at different times, and their execution order is not necessarily performed in sequence, but can be performed in turn or alternately with other steps or at least a portion of the sub-steps or stages of other steps.

[0141] It should be understood that the above is only an example and does not constitute any limitation on the technical solution of the present invention. In specific applications, technicians in this field can make settings as needed, and the present invention does not limit this.

[0142] 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 them according to actual needs to achieve the purpose of the present embodiment, and no limitation is made here.

[0143] In addition, for technical details not fully described in this embodiment, reference can be made to the hot water control method provided in any embodiment of the present invention, and will not be repeated here.

[0144] In addition, it should be noted that, in this article, the terms "include", "comprises" or any other variations thereof are intended to cover non-exclusive inclusion, so that a process, method, article or system including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or system. In the absence of further restrictions, an element defined by the sentence "comprises a ..." does not exclude the existence of other identical elements in the process, method, article or system including the element.

[0145] The serial numbers of the above embodiments of the present invention are only for description and do not represent the advantages or disadvantages of the embodiments.

[0146] Through the description of the above implementation methods, those skilled in the art can clearly understand that the above-mentioned embodiment methods can be implemented by means of software plus a necessary general hardware platform, and of course by hardware, but in many cases the former is a better implementation method. Based on such an 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, which 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 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.

[0147] 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 specification 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 hot water control method, characterized in that: The hot water control method is applied to a multi-split air conditioner, the multi-split air conditioner comprises: an air conditioner outdoor unit, a plurality of air conditioner indoor units and a hydraulic module, the air conditioner outdoor unit is respectively connected to each air conditioner indoor unit and the hydraulic module, the hydraulic module comprises a hot water tank and an electric auxiliary heating device corresponding to the hot water tank, the electric auxiliary heating device is used to heat the hot water tank; The hot water production control method comprises: When the hydraulic module is in heating operation, obtaining the outdoor ambient temperature of the area where the air conditioner outdoor unit is located, the water tank temperature of the hot water tank, and the set temperature; Determining the current operating state of the electric auxiliary heating device; The operating state of the electric auxiliary heating device is adjusted based on the electric heating control strategy corresponding to the current operating state, the outdoor ambient temperature, the water tank temperature and the set temperature.

2. The hot water control method according to claim 1, characterized in that: The water tank temperature includes: the upper temperature of the water tank and the lower temperature of the water tank; The adjusting the operating state of the electric auxiliary heating device based on the electric heating control strategy corresponding to the current operating state, the outdoor ambient temperature, the water tank temperature and the set temperature includes: When the current operation state is not started, obtaining the current built-in operation mode of the hot water tank; Determine the maximum water tank temperature between the upper water tank temperature and the lower water tank temperature; The electric auxiliary heating device is started according to the current built-in operation mode, the outdoor ambient temperature, the maximum water tank temperature and the set temperature until the maximum water tank temperature is greater than or equal to the first set temperature.

3. The hot water control method according to claim 2, characterized in that: The built-in operating mode of the hot water tank includes a hybrid mode; The method of starting the electric auxiliary heating device according to the current built-in operation mode, the outdoor ambient temperature, the maximum water tank temperature and the set temperature includes: Query the temperature of the heat pump water heating tank corresponding to the outdoor ambient temperature; When the current built-in operating mode is a hybrid mode, determining a target temperature range of the outdoor ambient temperature; Determine whether the temperature of the heat pump water tank, the upper temperature of the water tank, the lower temperature of the water tank or the maximum temperature of the water tank meets the start-up condition of the electric auxiliary heating device corresponding to the target temperature range; If the conditions are met, the electric auxiliary heating device is started.

4. The hot water control method according to claim 3, characterized in that: The built-in operation modes of the water heating tank also include energy-saving mode and electric heating mode; The hot water production control method further includes: When the current built-in operation mode is the energy-saving mode, the temperature of the heat pump water tank is lower than the set temperature, and the maximum temperature of the water tank is lower than the second set temperature, the heat pump unit is controlled to stop, and the electric auxiliary heating device is started, and the first set temperature is higher than the second set temperature; When the current built-in operation mode is the electric heating mode and the maximum temperature of the water tank is less than the first set temperature, the electric auxiliary heating device is started.

5. The hot water control method according to claim 1, characterized in that: The hot water production control method further includes: When the current operating state is forced compensation, obtaining an indoor unit operating mode of the air conditioner indoor unit; Query the compensation starting water temperature corresponding to the indoor unit operation mode; Determine a minimum water tank temperature between the water tank upper temperature and the water tank lower temperature; The operating state of the electric auxiliary heating device is adjusted according to the compensation starting water temperature and the minimum value of the water tank temperature.

6. The hot water control method according to claim 5, characterized in that: The step of adjusting the operating state of the electric auxiliary heating device according to the compensation starting water temperature and the minimum water tank temperature includes: When the minimum water tank temperature is greater than the first compensation start water temperature, the heat pump unit is started, and the electric auxiliary heating device is started until the maximum water tank temperature is greater than or equal to the first set temperature; When the minimum value of the water tank temperature is less than or equal to the first compensation starting water temperature, and greater than or equal to the second compensation starting water temperature, the current operating state of the electric auxiliary heating device is maintained, and the second compensation starting water temperature is less than the first compensation starting water temperature; When the water tank temperature is lower than the second compensation starting water temperature, the electric auxiliary heating device is controlled to operate in a temperature rise mode.

7. The hot water control method according to claim 6, characterized in that: The controlling the electric auxiliary heating device to operate in a temperature rise mode comprises: At preset intervals, obtaining the change difference of the minimum temperature of the water tank; Determining the temperature rise effect of the hot water tank according to the temperature coefficient corresponding to the outdoor ambient temperature and the change difference; The operating state of the electric auxiliary heating device is adjusted according to the judgment result.

8. A hot water control device, characterized in that: The hot water control device comprises: An acquisition module is used to acquire the outdoor ambient temperature of the area where the air conditioner outdoor unit is located, the water tank temperature of the hot water tank, and the set temperature when the hydraulic module is in heating operation; A determination module, used to determine the current operating state of the electric auxiliary heating device; The adjustment module is used to adjust the operating state of the electric auxiliary heating device based on the electric heating control strategy corresponding to the current operating state, the outdoor ambient temperature, the water tank temperature and the set temperature.

9. A multi-split air conditioner, characterized in that: The multi-split air conditioner includes: a memory, a processor, and a hot water making control program stored in the memory and executable on the processor, wherein the hot water making control program is configured to implement the hot water making control method according to any one of claims 1 to 7.

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

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