Heat pump multi-connected system, electric quantity detection method thereof and storage medium

Abstract

The heat pump multi-split system comprises an outdoor unit, an air conditioner indoor unit and a living water tank indoor unit, the outdoor unit comprises a compressor, an outdoor heat exchanger and a valve assembly, and the valve assembly comprises a first multi-way valve, a second multi-way valve and a third multi-way valve; the first multi-way valve is connected to the air conditioner indoor unit and the compressor, the second multi-way valve is connected to the compressor and the living water tank indoor unit, and the third multi-way valve is connected to the compressor and the outdoor heat exchanger. According to the embodiment of the invention, the target indoor unit participating in outdoor unit power distribution is determined through the multi-connected working mode, then the outdoor unit distribution power of each air conditioner indoor unit is determined according to the energy demand distribution condition, and then the independent electricity consumption of each air conditioner indoor unit can be further calculated; the purpose that the terminal of the indoor unit can display the power consumption is achieved, and therefore the use requirements of customers and the government subsidy requirements are met.

Description

Technical Field

[0001] The present application relates to the technical field of heat pump multi-connected systems, and in particular to a heat pump multi-connected system and a power detection method and storage medium thereof. Background Art

[0002] In the relevant technology, with the advancement of energy-saving policies in some regions and countries, displaying the power consumption of indoor units can help consumers to understand their energy consumption more visually, thereby guiding consumers to use energy-saving products, and the government will provide a certain amount of subsidies for this. Specifically, for the current multi-tube multi-split air conditioners, since they are powered by an outdoor unit, the power consumed by the outdoor unit generates cooling and heating, which is transported to each indoor unit terminal through the refrigerant. For one of the indoor units of the air conditioner that is working, it is difficult to calculate its power consumption contribution in the system, so it is difficult to allocate its corresponding power, and then it is difficult to detect the power consumption. In addition, there is currently no technology that allows each indoor unit terminal to display its individual power consumption when working.

[0003] In addition, the heat pump multi-split system includes a domestic water tank, which has special characteristics for the heat exchange between water and refrigerant. The refrigerant must meet certain temperature and pressure conditions to exchange heat with water. Therefore, it is more complicated to evaluate the labor consumption of domestic hot water. Summary of the invention

[0004] The present application aims to solve at least one of the technical problems existing in the prior art. To this end, the present application proposes a heat pump multi-connected system and a power detection method and storage medium thereof, so that the power consumption of the indoor unit terminal can be displayed, thereby meeting the usage needs of customers.

[0005] In a first aspect, an embodiment of the present application provides a heat pump multi-connected system comprising an outdoor unit, an air conditioner indoor unit and a domestic water tank indoor unit, wherein the outdoor unit comprises a compressor, an outdoor heat exchanger and a valve assembly, wherein the valve assembly comprises a first multi-way valve, a second multi-way valve and a third multi-way valve, wherein the first multi-way valve is connected to the air conditioner indoor unit and the compressor, the second multi-way valve is connected to the compressor and the domestic water tank indoor unit, and the third multi-way valve is connected to the compressor and the outdoor heat exchanger; the method comprises:

[0006] Acquire the working mode of the heat pump multi-connected system, and determine the target indoor unit that participates in the outdoor unit power distribution from the air conditioner indoor unit and the domestic water tank indoor unit according to the working mode;

[0007] Determine the sub-energy requirements of each of the target internal machines, and determine the total energy requirements of all the target internal machines according to the multiple sub-energy requirements;

[0008] Obtaining the total outdoor power of the outdoor unit, and determining the outdoor unit allocation power allocated by the outdoor unit to the target indoor unit according to the total outdoor power, the total energy demand and the sub-energy demand;

[0009] The power consumption of the target indoor unit is determined according to the allocated power of the outdoor unit.

[0010] According to some embodiments of the present application, determining the target indoor unit that participates in the outdoor unit power distribution from the air conditioner indoor unit and the domestic water tank indoor unit according to the working mode includes one of the following:

[0011] When the working mode is a cooling mode or a heating mode, determining the air conditioner indoor unit as a target indoor unit participating in outdoor unit power distribution;

[0012] When the working mode is a hot water making mode, determining the domestic water tank indoor unit as a target indoor unit participating in the outdoor unit power distribution;

[0013] When the working mode is the first cooling and hot water making mode, determining the air conditioner indoor unit as a target indoor unit participating in outdoor unit power distribution;

[0014] When the working mode is the second cooling and hot water making mode, determining the air conditioner indoor unit as a target indoor unit participating in outdoor unit power distribution;

[0015] When the working mode is the third cooling and hot water making mode, determining the air conditioner indoor unit and the domestic water tank indoor unit as target indoor units participating in the outdoor unit power distribution;

[0016] When the working mode is the heating and hot water mode, the target indoor unit participating in the outdoor unit power distribution is determined from the air conditioner indoor unit and the domestic water tank indoor unit according to the exhaust temperature and the high-pressure saturation temperature.

[0017] According to some embodiments of the present application, determining the target indoor unit participating in the outdoor unit power distribution from the air conditioner indoor unit and the domestic water tank indoor unit according to the exhaust temperature and the high-pressure saturation temperature includes one of the following:

[0018] When the exhaust temperature is greater than a first preset value and / or the high pressure saturation temperature is greater than a second preset value, the air conditioner indoor unit and the domestic water tank indoor unit are determined as target indoor units participating in the outdoor unit power distribution, wherein the first preset value and the second preset value are both determined by the minimum value of the water temperature at the upper part of the water tank and the water temperature at the lower part of the water tank;

[0019] When the exhaust temperature is less than or equal to a first preset value and the high-pressure saturation temperature is less than or equal to a second preset value, the air-conditioning indoor unit is determined to be a target indoor unit participating in outdoor unit power distribution.

[0020] According to some embodiments of the present application, obtaining the total external power of the outdoor unit includes:

[0021] Obtaining the total power of the compressor and the motor of the outdoor unit, the valve power of the outdoor unit, and the auxiliary electric heating power of the outdoor unit;

[0022] The total power of the two, the valve power of the outdoor unit and the auxiliary electric heating power of the outdoor unit are superimposed to obtain the total power of the outdoor unit.

[0023] According to some embodiments of the present application, the total power of the two is determined by the following steps:

[0024] Detect the power supply voltage and current through the external main control board;

[0025] The total power of the compressor and the motor is calculated according to the supply voltage and the supply current.

[0026] According to some embodiments of the present application, the power of the external machine valve is determined by the following steps:

[0027] Determine the number of external unit valves in the energized working state;

[0028] The external valve power of the outdoor unit is calculated according to the number of the external valves and the preset power-on power of a single valve.

[0029] According to some embodiments of the present application, the external auxiliary electric heating power is determined by the following steps:

[0030] Determine the working status of the compressor electric heating belt and the chassis electric heating belt;

[0031] Determine the compressor electric heating belt power and the chassis electric heating belt power according to the working state;

[0032] The compressor electric heating belt power and the chassis electric heating belt power are superimposed to obtain the outdoor unit auxiliary electric heating power of the outdoor unit.

[0033] According to some embodiments of the present application, determining the working status of the compressor electric heating belt and the chassis electric heating belt includes:

[0034] Get the outdoor ambient temperature;

[0035] The working states of the compressor electric heating belt and the chassis electric heating belt are determined according to the outdoor ambient temperature.

[0036] According to some embodiments of the present application, determining the working state of the compressor electric heating belt and the chassis electric heating belt according to the outdoor ambient temperature includes:

[0037] Determining that the outdoor unit is in a standby state;

[0038] When the outdoor ambient temperature is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, the following cyclic operation is performed: the compressor electric heating belt and the chassis electric heating belt are started and run continuously for a first preset time, and then the compressor electric heating belt and the chassis electric heating belt are stopped and stopped continuously for a second preset time;

[0039] When the outdoor ambient temperature is lower than the first preset temperature, the compressor electric heating belt and the chassis electric heating belt are kept started.

[0040] According to some embodiments of the present application, determining the working state of the compressor electric heating belt and the chassis electric heating belt according to the outdoor ambient temperature further includes:

[0041] Determining that the outdoor unit is in a powered-on state;

[0042] When the outdoor ambient temperature is less than or equal to a second preset temperature, the compressor electric heating belt and the chassis electric heating belt are kept started;

[0043] When the outdoor ambient temperature is greater than a third preset temperature, the compressor electric heating belt and the chassis electric heating belt are turned off, wherein the third preset temperature is greater than the second preset temperature.

[0044] According to some embodiments of the present application, the energy required for the indoor unit of the air conditioner is determined by the following steps:

[0045] Obtaining the energy demand reference value, wind speed coefficient and horsepower of the air conditioner indoor unit;

[0046] The energy demand of the indoor unit of the air conditioner is determined according to the energy demand reference value, the wind speed coefficient and the horsepower.

[0047] According to some embodiments of the present application, the energy requirement reference value is determined by the following steps:

[0048] Get the indoor ambient temperature;

[0049] Determining a capacity requirement range of the air conditioner indoor unit according to a temperature difference between the indoor ambient temperature and the indoor set temperature;

[0050] The energy requirement reference value is determined according to the capacity requirement interval, wherein there is a positive correlation between the energy requirement reference value and the temperature difference corresponding to the capacity requirement interval.

[0051] According to some embodiments of the present application, the wind speed coefficient is determined by the following steps:

[0052] Obtaining the wind speed of the indoor fan of the indoor unit of the air conditioner;

[0053] The wind speed coefficient is determined according to the wind speed of the indoor fan, wherein there is a positive correlation between the wind speed coefficient and the wind speed of the indoor fan.

[0054] According to some embodiments of the present application, the energy required for the machine in the domestic water tank is determined by the following steps:

[0055] Obtain the rated capacity of the water tank and the water tank capacity requirement coefficient of the domestic water tank internal unit;

[0056] The energy requirement of the machine in the domestic water tank is determined according to the rated capacity of the water tank and the water tank capacity requirement coefficient.

[0057] According to some embodiments of the present application, the water tank capacity requirement coefficient is determined by the following steps:

[0058] Obtain water tank water temperature, outdoor ambient temperature and water tank operation mode;

[0059] The water tank capacity requirement coefficient is determined according to the water temperature of the water tank, the outdoor ambient temperature and the water tank operation mode.

[0060] In a second aspect, an embodiment of the present application provides a controller comprising: a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the power detection method for the heat pump multi-connected system of the first aspect when running the computer program.

[0061] In a third aspect, an embodiment of the present application provides a heat pump multi-connected system, comprising the controller of the second aspect described above.

[0062] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium storing computer-executable instructions, wherein the computer-executable instructions are used to execute the power detection method for a heat pump multi-connected system as described in the first aspect above.

[0063] In a fifth aspect, an embodiment of the present application provides a computer program product, comprising a computer program or a computer instruction, characterized in that the computer program or the computer instruction is stored in a computer-readable storage medium, a processor of a computer device reads the computer program or the computer instruction from the computer-readable storage medium, and the processor executes the computer program or the computer instruction, so that the computer device executes the power detection method for a heat pump multi-connected system as described in the first aspect above.

[0064] According to the technical solution of the embodiment of the present application, there are at least the following beneficial effects: the embodiment of the present application provides a method that allows each indoor unit terminal to display its individual power consumption. First, the target indoor unit participating in the outdoor unit power distribution is determined from the air-conditioning indoor unit and the domestic water tank according to the working mode of the heat pump multi-split system, and then the outdoor unit allocation power allocated by the outdoor unit to the target indoor unit is determined according to the total outdoor unit power of the outdoor unit, the total energy demand of all target indoor units and the sub-energy demand of each target indoor unit. Finally, the power consumption of the target indoor unit is calculated based on the outdoor unit allocation power. Therefore, the embodiment of the present application determines the target indoor unit participating in the outdoor unit power distribution through the multi-split working mode, and then determines the outdoor unit allocation power of each air-conditioning indoor unit according to the energy demand distribution situation, and then can further calculate the individual power consumption of each air-conditioning indoor unit, thereby achieving the purpose of the indoor unit terminal being able to display its power consumption, thereby meeting the customer's usage needs and government subsidy requirements.

[0065] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0066] The accompanying drawings are used to provide further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application and do not constitute a limitation on the technical solution of the present application.

[0067] Figure 1 It is a structural schematic diagram of a heat pump multi-connected system provided by an embodiment of the present application;

[0068] Figure 2 This is a flow chart of a method for detecting power of a heat pump multi-connected system provided by an embodiment of the present application;

[0069] Figure 3 is a flow chart of a method for detecting power of a heat pump multi-connected system provided by another embodiment of the present application;

[0070] Figure 4 is a flow chart of a method for detecting power of a heat pump multi-connected system provided by another embodiment of the present application;

[0071] Figure 5 is a flow chart of a method for detecting power of a heat pump multi-connected system provided by another embodiment of the present application;

[0072] Figure 6 is a flow chart of a method for detecting power of a heat pump multi-connected system provided by another embodiment of the present application;

[0073] Figure 7 is a flow chart of a method for detecting power of a heat pump multi-connected system provided by another embodiment of the present application;

[0074] Figure 8 is a flow chart of a method for detecting power of a heat pump multi-connected system provided by another embodiment of the present application;

[0075] Fig. 9 is a flow chart of a method for detecting power of a heat pump multi-connected system provided by another embodiment of the present application;

[0076] Fig.10 is a flow chart of a method for detecting power of a heat pump multi-connected system provided by another embodiment of the present application;

[0077] Fig.11 is a flow chart of a method for detecting power of a heat pump multi-connected system provided by another embodiment of the present application;

[0078] Fig.12 is a flow chart of a method for detecting power of a heat pump multi-connected system provided by another embodiment of the present application;

[0079] Fig.13 is a flow chart of a method for detecting power of a heat pump multi-connected system provided by another embodiment of the present application;

[0080] Fig.14 is a flow chart of a method for detecting power of a heat pump multi-connected system provided by another embodiment of the present application;

[0081] Fig.15 is a flow chart of a method for detecting power of a heat pump multi-connected system provided by another embodiment of the present application;

[0082] Fig.16 is a flow chart of a method for detecting power of a heat pump multi-connected system provided by another embodiment of the present application;

[0083] Fig.17 This is a schematic diagram of determining the capacity requirement range of an air conditioner indoor unit provided by an embodiment of the present application;

[0084] Fig.18 This is a schematic diagram for determining the capacity requirement range of a domestic water tank internal unit provided by an embodiment of the present application;

[0085] Fig.19 It is a schematic diagram of a controller for executing a power detection method for a heat pump multi-connected system provided by an embodiment of the present application. DETAILED DESCRIPTION

[0086] The embodiments of the present application are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application, and cannot be understood as limiting the present application.

[0087] In the description of the present application, it should be understood that descriptions involving orientation, such as up, down, front, back, left, right, etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0088] In the description of this application, "several" means one or more, "more" means more than two, "greater than", "less than", "exceed", etc. are understood to exclude the number itself, and "above", "below", "within", etc. are understood to include the number itself. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0089] In the description of this application, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in this application based on the specific content of the technical solution.

[0090] In some cases, with the advancement of energy-saving policies in some regions and countries, displaying the power consumption of indoor units can help consumers understand their energy consumption more visually, thereby guiding consumers to use energy-saving products, and the government will provide a certain amount of subsidies for this. Specifically, for the current multi-tube multi-split air conditioners, since they are powered by an outdoor unit, the power consumed by the outdoor unit generates cooling and heating, which is transported to each indoor unit terminal through the refrigerant. For one of the indoor units of the air conditioner that is working, it is difficult to calculate its power consumption contribution in the system, so it is difficult to allocate its corresponding power, and then it is difficult to detect the power consumption. In addition, there is currently no technology that allows each indoor unit terminal to display its individual power consumption when working.

[0091] In addition, the heat pump multi-split system includes a domestic water tank, which has special characteristics for the heat exchange between water and refrigerant. The refrigerant must meet certain temperature and pressure conditions to exchange heat with water. Therefore, it is more complicated to evaluate the labor consumption of domestic hot water.

[0092] Based on the above situation, the embodiment of the present application proposes a heat pump multi-connected system and its power detection method and storage medium, aiming to enable the indoor unit terminal to display its power consumption, thereby meeting the customer's usage needs.

[0093] The various embodiments of the heat pump multi-connected system of the present application are further described below in conjunction with the accompanying drawings.

[0094] like Figure 1 As shown, Figure 1It is a schematic diagram of the structure of a heat pump multi-connected system provided in one embodiment of the present application.

[0095] In one embodiment, the heat pump multi-connected system includes indoor side equipment and outdoor side equipment, wherein the indoor side equipment includes Figure 1 The air conditioner indoor unit 100 and the domestic water tank indoor unit 300 shown in the figure, the outdoor equipment includes Figure 1 In the outdoor unit shown in the figure, the outdoor unit, the air-conditioning indoor unit 100 and the domestic water tank indoor unit 300 are connected through a refrigerant pipeline; wherein the outdoor unit is provided with an outdoor heat exchanger 200, a compressor 400 and a valve assembly, and the compressor 400 is connected to the outdoor heat exchanger 200, the air-conditioning indoor unit 100 and the domestic water tank indoor unit 300 through the valve assembly.

[0096] In one embodiment, if Figure 1 As shown, the valve assembly includes but is not limited to a first multi-way valve 510, a second multi-way valve 520 and a third multi-way valve 530, the first multi-way valve 510 is connected to the air intake of the air conditioner indoor unit 100 and the compressor 400, the second multi-way valve 520 is connected to the exhaust port of the compressor 400 and the domestic water tank indoor unit 300, and the third multi-way valve 530 is connected to the exhaust port, the intake port and one end of the outdoor heat exchanger 200 of the compressor 400.

[0097] It can be understood that the first multi-way valve 510 , the second multi-way valve 520 and the third multi-way valve 530 mentioned above can be three-way valves or four-way valves, and the embodiment of the present application does not specifically limit this.

[0098] In one embodiment, if Figure 1 As shown, the valve assembly also includes but is not limited to a main expansion valve 610. The other end of the outdoor heat exchanger 200 is connected to the air conditioner indoor unit 100 and the domestic water tank indoor unit 300 through the main expansion valve 610.

[0099] In one embodiment, the compressor 400 can be connected to the first end of the domestic water tank indoor unit 300 through the second multi-way valve 520, the second end of the domestic water tank indoor unit 300 is connected to the first end of the air-conditioning indoor unit 100, and the second end of the air-conditioning indoor unit 100 is connected to the first multi-way valve 510. In addition, the compressor 400 is also connected to the first end of the outdoor heat exchanger 200 through the third multi-way valve 530, the second end of the outdoor heat exchanger 200 is connected to the first end of the air-conditioning indoor unit 100 and the second end of the domestic water tank indoor unit 300 through the main expansion valve 610, and the second end of the air-conditioning indoor unit 100 is connected to the first multi-way valve 510.

[0100] In one embodiment, if Figure 1As shown, the valve assembly also includes but is not limited to multiple sub-expansion valves 620, one end of the main expansion valve 610 is connected to the outdoor heat exchanger 200, and the other end is connected to the air-conditioning indoor unit 100 through the sub-expansion valve 620, and is connected to the domestic water tank indoor unit 300 through the sub-expansion valve 620.

[0101] Based on the hardware structure of the heat pump multi-connected system of each of the above-mentioned embodiments, various embodiments of the power detection method of the heat pump multi-connected system of the present application are respectively proposed below.

[0102] like Figure 2 As shown, Figure 2 It is a flow chart of a method for detecting power of a heat pump multi-connected system provided by an embodiment of the present application; the method for detecting power of a heat pump multi-connected system may include but is not limited to step S210, step S220, step S230 and step S240.

[0103] Step S210, obtaining the working mode of the heat pump multi-connected system, and determining the target indoor unit that participates in the outdoor unit power distribution from the air conditioner indoor unit and the domestic water tank indoor unit according to the working mode;

[0104] Step S220, determining the sub-energy requirements of each target indoor machine, and determining the total energy requirements of all target indoor machines according to the multiple sub-energy requirements;

[0105] Step S230, obtaining the total power of the outdoor unit, and determining the outdoor unit allocation power allocated by the outdoor unit to the target indoor unit according to the total power of the outdoor unit, the total energy demand and the sub-energy demand;

[0106] Step S240: determining the power consumption of the target indoor unit according to the allocated power of the outdoor unit.

[0107] In one embodiment, the embodiment of the present application will obtain the working mode of the heat pump multi-split system. Since different working modes have corresponding target indoor units participating in the outdoor unit power distribution, the embodiment of the present application can determine the target indoor units participating in the outdoor unit power distribution from the air-conditioning indoor units and the domestic water tank through the working mode; then, the embodiment of the present application will determine the capacity requirements of each target indoor unit, that is, the energy requirements, and then superimpose multiple sub-energy requirements to obtain the total energy requirements of all target indoor units; then, the embodiment of the present application will obtain the total outdoor unit power of the outdoor unit, so that when a certain target indoor unit needs to display the power consumption, the proportion of the sub-energy demand of the target indoor unit to the total energy demand of all target indoor units will be calculated, and then the outdoor unit allocation power allocated to the target indoor unit by the outdoor unit will be calculated by multiplication according to the total outdoor unit power, and the power consumption of the target indoor unit will be calculated according to the outdoor unit allocation power.

[0108] It is worth noting that the embodiment of the present application determines the target indoor unit participating in the outdoor unit power distribution through a multi-connected working mode, and then determines the outdoor unit distribution power of each air-conditioning indoor unit according to the energy demand distribution situation, and then can further calculate the individual power consumption of each air-conditioning indoor unit itself, thereby achieving the purpose of being able to display the power consumption of the indoor unit terminal, thereby meeting the customer's usage needs and government subsidy requirements.

[0109] In addition, if Figure 3 As shown, Figure 3 It is a flow chart of a method for detecting power of a heat pump multi-split system provided by an embodiment of the present application; regarding the above-mentioned step S210 of determining the target indoor unit participating in the power distribution of the outdoor unit from the air-conditioning indoor unit and the domestic water tank indoor unit according to the working mode, it may include but is not limited to step S310, step S320, step S330, step S340, step S350 and step S360.

[0110] Step S310: When the working mode is the cooling mode or the heating mode, the indoor unit of the air conditioner is determined as the target indoor unit for participating in the outdoor unit power distribution;

[0111] Step S320: When the working mode is the hot water making mode, determine the domestic water tank indoor unit as the target indoor unit participating in the outdoor unit power distribution;

[0112] Step S330: when the working mode is the first cooling and hot water making mode, determining the air conditioner indoor unit as the target indoor unit participating in the outdoor unit power distribution;

[0113] Step S340: When the working mode is the second cooling and hot water making mode, determine the air conditioner indoor unit as the target indoor unit participating in the outdoor unit power distribution;

[0114] Step S350: When the working mode is the third cooling and hot water mode, determine the air conditioner indoor unit and the domestic water tank indoor unit as the target indoor units participating in the outdoor unit power distribution;

[0115] Step S360: When the working mode is heating and hot water mode, the target indoor unit participating in the outdoor unit power distribution is determined from the air conditioner indoor unit and the domestic water tank indoor unit according to the exhaust temperature and the high-pressure saturation temperature.

[0116] It is understandable that different working modes have corresponding target indoor units participating in the outdoor unit power distribution.

[0117] It can be understood that since the unit inside the domestic water tank will only participate in the power distribution of the external unit when the working conditions are met, the embodiment of the present application determines whether the unit inside the domestic water tank meets the working conditions through the exhaust temperature and the high-pressure saturation temperature.

[0118] It can be understood that in the first cooling and hot water making mode, the outdoor heat exchanger does not work or hardly works, the first multi-way valve connects the air conditioner indoor unit and the air intake of the compressor, the second multi-way valve connects the exhaust port of the compressor and the indoor unit of the domestic water tank, the third multi-way valve connects the outdoor heat exchanger and the air intake of the compressor, and the main expansion valve is in a fully closed state or is opened to a fixed degree.

[0119] Specifically, when the heat pump multi-connected system is in the first cooling and hot water making mode and the main expansion valve is closed, the refrigerant is compressed by the compressor and enters the domestic water tank unit through the second multi-way valve for heat exchange and condensation, thereby heating the water in the domestic water tank unit. At this time, the sub-expansion valve is in an open state, while the main expansion valve is in a closed state. Therefore, after condensation, all the refrigerant passes through the sub-expansion valve and enters each air conditioner unit for evaporation. Finally, the refrigerant that has been evaporated will re-enter the compressor through the first multi-way valve, forming a cycle. Since the main expansion valve is in a closed state, the condensed refrigerant will not enter the outdoor heat exchanger through the main expansion valve.

[0120] Alternatively, when the heat pump multi-connected system is in the first cooling and hot water making mode, and the main expansion valve is opened to a fixed opening, after the refrigerant is compressed by the compressor, it enters the domestic water tank unit through the second multi-way valve for heat exchange and condensation, and then the water in the domestic water tank unit can be heated. At this time, the main expansion valve and the sub-expansion valve are in an open state, so the condensed refrigerant will be divided into two parts. Most of the refrigerant enters each air conditioner unit through the sub-expansion valve for evaporation. Finally, the refrigerant that has been evaporated will re-enter the compressor through the first multi-way valve to form a cycle. At the same time, a very small part of the refrigerant enters the outdoor heat exchanger through the main expansion valve, so that the refrigerant inside the outdoor heat exchanger can circulate, avoiding the problem of refrigerant hoarding in the non-working outdoor heat exchanger under extremely low temperature conditions. Finally, the refrigerant that has passed through the outdoor heat exchanger will re-enter the compressor through the third multi-way valve to form a cycle.

[0121] It can be understood that in the second cooling and hot water making mode, the outdoor heat exchanger serves as an evaporator, the first multi-way valve connects the air conditioner indoor unit and the air intake of the compressor, the second multi-way valve connects the exhaust port of the compressor and the indoor unit of the domestic water tank, the third multi-way valve connects the outdoor heat exchanger and the air intake of the compressor, and the opening of the main expansion valve is adjusted according to the preset logic.

[0122] Specifically, when the heat pump multi-connected system is in the second cooling and hot water making mode, after being compressed by the compressor, the refrigerant enters the domestic water tank unit through the second multi-way valve for heat exchange and condensation, and then the water in the domestic water tank unit can be heated, and at this time the main expansion valve and the sub-expansion valve are in an open state, so the condensed refrigerant will be divided into two parts, one part of the refrigerant enters each air conditioner unit through the sub-expansion valve for evaporation, and finally, the refrigerant after evaporation will re-enter the compressor through the first multi-way valve, forming a cycle. At the same time, the other part of the refrigerant enters the outdoor heat exchanger through the main expansion valve for evaporation, and finally, the refrigerant after evaporation will re-enter the compressor through the third multi-way valve, forming a cycle.

[0123] It can be understood that in the third cooling and hot water making mode, the outdoor heat exchanger acts as a condenser, the first multi-way valve connects the air conditioner indoor unit and the air intake of the compressor, the second multi-way valve connects the exhaust port of the compressor and the indoor unit of the domestic water tank, the third multi-way valve connects the exhaust port of the compressor and the outdoor heat exchanger, and the main expansion valve is in a fully open state.

[0124] Specifically, when the heat pump multi-split system is in the third cooling and hot water making mode, the refrigerant is compressed by the compressor and divided into two parts of refrigerant. One part of the refrigerant will enter the outdoor heat exchanger through the third multi-way valve for heat exchange and condensation, and at this time the main expansion valve and the sub-expansion valve are in an open state, so the condensed refrigerant passes through the main expansion valve and the sub-expansion valve corresponding to the air-conditioning indoor unit and enters each air-conditioning indoor unit for evaporation treatment; while the other part of the refrigerant enters the domestic water tank indoor unit through the second multi-way valve for heat exchange and condensation, and then the water in the domestic water tank indoor unit can be heated and stored, and at this time the sub-expansion valve is in an open state, so the condensed refrigerant passes through the sub-expansion valve and enters each air-conditioning indoor unit for evaporation treatment; finally, all refrigerants that have been evaporated in the air-conditioning indoor unit will re-enter the compressor through the first multi-way valve to form a cycle.

[0125] In addition, if Figure 4 As shown, Figure 4 It is a flow chart of a method for detecting power of a heat pump multi-split system provided by an embodiment of the present application; regarding the above-mentioned step S350 in which the target indoor unit participating in the outdoor unit power distribution is determined from the air-conditioning indoor unit and the domestic water tank indoor unit according to the exhaust temperature and the high-pressure saturation temperature, it may include but is not limited to step S410 and step S420.

[0126] Step S410: When the exhaust temperature is greater than a first preset value and / or the high pressure saturation temperature is greater than a second preset value, the air conditioner indoor unit and the domestic water tank indoor unit are determined as target indoor units participating in the outdoor unit power distribution, wherein the first preset value and the second preset value are both determined by the minimum value of the water temperature at the upper part of the water tank and the water temperature at the lower part of the water tank;

[0127] Step S420: When the exhaust temperature is less than or equal to the first preset value and the high pressure saturation temperature is less than or equal to the second preset value, the indoor unit of the air conditioner is determined to be the target indoor unit participating in the outdoor unit power distribution.

[0128] In one embodiment, the embodiment of the present application determines whether the domestic water tank indoor unit meets the working conditions through the exhaust temperature and the high-pressure saturation temperature. When the exhaust temperature is greater than the first preset value and / or the high-pressure saturation temperature is greater than the second preset value, the domestic water tank indoor unit meets the working conditions, thereby determining the air-conditioning indoor unit and the domestic water tank indoor unit as the target indoor units participating in the power distribution of the outdoor unit; in addition, when the exhaust temperature is less than or equal to the first preset value and the high-pressure saturation temperature is less than or equal to the second preset value, the domestic water tank indoor unit does not meet the working conditions, thereby determining the air-conditioning indoor unit as the target indoor unit participating in the power distribution of the outdoor unit.

[0129] It can be understood that the first preset value and the second preset value are both determined by the minimum value of the water temperature at the upper part of the water tank and the water temperature at the lower part of the water tank.

[0130] In addition, if Figure 5 As shown, Figure 5 It is a flow chart of a power detection and control method for a multi-split air conditioner provided by another embodiment of the present application; the process of obtaining the total power of the outdoor unit in the above step S230 may include but is not limited to step S510 and step S520.

[0131] Step S510, obtaining the total power of the compressor and the motor of the outdoor unit, the valve power of the outdoor unit, and the auxiliary electric heating power of the outdoor unit;

[0132] Step S520: Superimpose the total power of the two, the valve power of the outdoor unit and the auxiliary electric heating power of the outdoor unit to obtain the total power of the outdoor unit.

[0133] In one embodiment, since the outdoor unit has various valves in addition to high-power devices such as the compressor and the fan motor, and may also be provided with an auxiliary electric heating belt, in order to comprehensively count the total external power of the outdoor unit, it is necessary to superimpose the total power of the compressor and the motor, the external valve power of various valves, and the external auxiliary electric heating power of the auxiliary electric heating belt to obtain the final and accurate total external power of the outdoor unit.

[0134] In this regard, the calculation formula for the total power of the outdoor unit is as follows: P ODU =P motor +P 4WV +P PTC , where P ODU is the total power of the outdoor unit, P motor is the total power of the compressor and the motor, P 4WVis the power of the external valve, P PTC It is the auxiliary electric heating power of the external unit.

[0135] In addition, if Figure 6 As shown, Figure 6 It is a flowchart of a power detection and control method for a multi-split air conditioner provided by another embodiment of the present application; the process of obtaining the total power of the compressor and the motor in the above-mentioned step S510 may include but is not limited to step S610 and step S620.

[0136] Step S610, detecting the power supply voltage and the power supply current through the external main control board;

[0137] Step S620: Calculate the total power of the compressor and the motor according to the power supply voltage and the power supply current.

[0138] In one embodiment, the total power of the compressor and the motor can be calculated by detecting the power supply voltage and the power supply current, and calculating the total power of the compressor and the motor according to the following calculation formula: motor =U*I, where U is the supply voltage and I is the supply current.

[0139] In addition, if Figure 7 As shown, Figure 7 It is a flowchart of a power detection and control method for a multi-split air conditioner provided by another embodiment of the present application; the process of obtaining the power of the external valve in the above step S510 may include but is not limited to step S710 and step S720.

[0140] Step S710, determining the number of external unit valves in the power-on working state;

[0141] Step S720: Calculate the valve power of the outdoor unit according to the number of valves of the outdoor unit and the preset power-on power of a single valve.

[0142] In one embodiment, the power of the external valves can be calculated by counting the number of external valves that are powered on, and according to the preset power of a single external valve, the power of the external valves can be calculated by the following calculation formula: 4WV =p*N, where p is the preset power-on power of a single external valve, and N is the number of external valves in the power-on working state.

[0143] In addition, if Figure 8 As shown, Figure 8 It is a flow chart of a power detection and control method for a multi-split air conditioner provided by another embodiment of the present application; the process of obtaining the auxiliary electric heating power of the external unit in the above step S510 may include but is not limited to step S810, step S820 and step S830.

[0144] Step S810, determining the working status of the compressor electric heating belt and the chassis electric heating belt;

[0145] Step S820, determining the compressor electric heating zone power and the chassis electric heating zone power according to the working state;

[0146] Step S830: superimpose the compressor electric heating zone power and the chassis electric heating zone power to obtain the outdoor unit auxiliary electric heating power.

[0147] The compressor electric heating belt is an electric heating element installed inside the compressor. It is mainly used to heat the inside of the compressor in a low temperature environment to prevent the condensed water from freezing or solidifying and ensure the normal operation of the compressor. In winter or extremely cold environments, the role of the electric heating belt is particularly important. It usually starts automatically when the temperature drops to a certain level to ensure that the inside of the compressor maintains a suitable working temperature. The working principle of the compressor electric heating belt is mainly to generate heat through the flow of current through the resistance wire, and transfer the heat to the surrounding environment or objects to achieve the purpose of heating. It has the characteristics of high flexibility, high efficiency and energy saving, easy control and long life. The compressor electric heating belt can be customized according to the required shape and size to adapt to different equipment and places.

[0148] The chassis electric heating belt is an important component in the air conditioning system. It is mainly used to prevent the chassis of the air conditioner outdoor unit from freezing in low temperature environments, which affects the normal operation and efficiency of the air conditioner. Specifically, the functions of the chassis electric heating belt include: in the winter heating state, it prevents the chassis from freezing after the condenser enters the defrost mode to ensure the normal operation of the unit. Its working principle is: after the chassis electric heating belt is powered on, the internal resistance wire heats up to achieve the purpose of deicing.

[0149] In one embodiment, for the calculation of the external unit auxiliary electric heating power, it is necessary to simultaneously calculate the compressor electric heating zone power and the chassis electric heating zone power, and the sum of the two is the external unit auxiliary electric heating power.

[0150] In addition, if Fig. 9 As shown, Fig. 9 It is a flowchart of a method for detecting and controlling power of a multi-split air conditioner provided by another embodiment of the present application; regarding the above-mentioned step S810, it may include but is not limited to step S910 and step S920.

[0151] Step S910, obtaining the outdoor ambient temperature;

[0152] Step S920: determining the working status of the compressor electric heating belt and the chassis electric heating belt according to the outdoor ambient temperature.

[0153] In one embodiment, if the outdoor ambient temperature is low, it may cause frost or ice, and therefore, the embodiment of the present application needs to determine the working status of the compressor electric heating belt and the chassis electric heating belt according to the outdoor ambient temperature.

[0154] In addition, if Fig.10 As shown, Fig.10 It is a flowchart of a method for detecting and controlling power of a multi-split air conditioner provided by another embodiment of the present application; regarding the above-mentioned step S920, it may include but is not limited to step S1010, step S1020 and step S1030.

[0155] Step S1010, determining that the outdoor unit is in a standby state;

[0156] Step S1020: When the outdoor ambient temperature is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, the following cyclic operation is performed: the compressor electric heating belt and the chassis electric heating belt are started and run continuously for a first preset time, and then the compressor electric heating belt and the chassis electric heating belt are stopped and stopped continuously for a second preset time;

[0157] Step S1030: When the outdoor ambient temperature is lower than the first preset temperature, the compressor electric heating belt and the chassis electric heating belt are kept started.

[0158] In one embodiment, when the outdoor unit is in standby mode, if the outdoor ambient temperature is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, that is, the outdoor ambient temperature is slightly low, the probability of frost or ice is not high at this time. In order to prevent frost or ice while avoiding excessive power consumption, the embodiment of the present application will intermittently start the compressor electric heating belt and the chassis electric heating belt, for example, first start the first preset time, then stop the second preset time, then start the first preset time, and then stop the second preset time, and so on. If the outdoor ambient temperature is less than the first preset temperature, the probability of frost or ice is high at this time. In order to prevent frost or ice, it is necessary to keep the compressor electric heating belt and the chassis electric heating belt started.

[0159] It can be understood that, regarding the above-mentioned first preset temperature and the second preset temperature, the value of the first preset temperature is smaller than the second preset temperature, and the values ​​of the first preset temperature and the second preset temperature can be preset, and the embodiment of the present application does not make specific limitations on this.

[0160] In addition, if Fig.11 As shown, Fig.11 It is a flowchart of a method for detecting and controlling power of a multi-split air conditioner provided by another embodiment of the present application; regarding the above-mentioned step S920, it may also include but not be limited to step S1110, step S1120 and step S1130.

[0161] Step S1110, determining that the outdoor unit is in the on state;

[0162] Step S1120: When the outdoor ambient temperature is less than or equal to the second preset temperature, keep starting the compressor electric heating belt and the chassis electric heating belt;

[0163] Step S1130: When the outdoor ambient temperature is greater than a third preset temperature, turn off the compressor electric heating belt and the chassis electric heating belt, wherein the third preset temperature is greater than the second preset temperature.

[0164] In one embodiment, when the outdoor unit is in the on state, if the outdoor ambient temperature is less than or equal to the second preset temperature, that is, the outdoor ambient temperature is slightly low, but in order to avoid affecting the normal operation of the components of the outdoor unit such as the compressor, the embodiment of the present application needs to keep the compressor electric heating belt and the chassis electric heating belt started. If the outdoor ambient temperature is greater than the third preset temperature, that is, the outdoor ambient temperature is high, it is difficult or impossible to frost or ice at this time. In this regard, the embodiment of the present application can turn off the compressor electric heating belt and the chassis electric heating belt.

[0165] It can be understood that, regarding the above-mentioned third preset temperature, its value is greater than the second preset temperature, and the value of the third preset temperature can be preset, and the embodiment of the present application does not make any specific limitation on this.

[0166] like Fig.12 As shown, Fig.12 It is a flow chart of a power detection and control method for a multi-split air conditioner provided by another embodiment of the present application; the process of determining the energy demand of the above-mentioned indoor air conditioner may include but is not limited to step S1210 and step S1220.

[0167] Step S1210, obtaining the energy demand reference value, wind speed coefficient and horsepower of the indoor air conditioner;

[0168] Step S1220: determine the energy demand of the indoor unit of the room air conditioner according to the energy demand reference value, wind speed coefficient and horsepower.

[0169] In one embodiment, the present application can calculate the energy requirement of each indoor air conditioner by the following formula: Q cn =K_ΔT*K_fan*HP, where Q cn is the energy demand of each indoor air conditioner, K_ΔT is the energy demand reference value, K_fan is the wind speed coefficient of the indoor air conditioner, and HP is the horsepower.

[0170] like Fig.13 As shown, Fig.13It is a flowchart of a power detection and control method for a multi-split air conditioner provided in another embodiment of the present application; the process of obtaining the above-mentioned energy requirement reference value may include but is not limited to step S1310, step S1320 and step S1330.

[0171] Step S1310, obtaining indoor ambient temperature;

[0172] Step S1320, determining the capacity requirement range of the indoor air conditioner according to the temperature difference between the indoor ambient temperature and the indoor set temperature;

[0173] Step S1330: determining an energy requirement reference value according to the capacity requirement interval, wherein the energy requirement reference value is positively correlated with the temperature difference corresponding to the capacity requirement interval.

[0174] In one embodiment, the embodiment of the present application calculates the temperature difference between the indoor ambient temperature and the indoor set temperature, wherein one temperature difference corresponds to one capacity requirement interval, and then determines the energy requirement reference value according to the capacity requirement interval. If the temperature difference corresponding to the capacity requirement interval is larger, the energy requirement reference value is larger; if the temperature difference corresponding to the capacity requirement interval is smaller, the energy requirement reference value is smaller.

[0175] like Fig.14 As shown, Fig.14 It is a flow chart of a power detection and control method for a multi-split air conditioner provided in another embodiment of the present application; the process of obtaining the above-mentioned wind speed coefficient may include but is not limited to step S1410 and step S1420.

[0176] Step S1410, obtaining the wind speed of the indoor fan of the indoor unit of the room air conditioner;

[0177] Step S1420, determining a wind speed coefficient according to the wind speed of the indoor fan, wherein the wind speed coefficient is positively correlated with the wind speed of the indoor fan.

[0178] In one embodiment, the embodiment of the present application will obtain the wind speed of the indoor fan of the room air conditioner, wherein different wind speeds correspond to different wind speed coefficients. If the wind speed of the indoor fan is greater, the wind speed coefficient is greater; if the wind speed of the indoor fan is smaller, the wind speed coefficient is smaller.

[0179] In addition, the horsepower is related to the nominal cooling capacity of the indoor air conditioner. If the nominal cooling capacity is larger, the horsepower is larger; if the nominal cooling capacity is smaller, the horsepower is smaller.

[0180] like Fig.15 As shown, Fig.15 It is a flow chart of a power detection and control method for a multi-split air conditioner provided by another embodiment of the present application; the process of determining the energy demand of the above-mentioned domestic water tank internal unit may include but is not limited to step S1510 and step S1520.

[0181] Step S1510, obtaining the rated capacity of the water tank and the water tank capacity requirement coefficient of the domestic water tank internal unit;

[0182] Step S1520: determine the energy requirement of the machine in the domestic water tank according to the rated capacity of the water tank and the water tank capacity requirement coefficient.

[0183] In one embodiment, the embodiment of the present application will obtain the rated capacity of the water tank and the water tank capacity demand coefficient of the domestic water tank internal unit, so as to obtain the sub-energy demand of the domestic water tank internal unit according to the product of the rated capacity of the water tank and the water tank capacity demand coefficient.

[0184] like Fig.16 As shown, Fig.16 It is a flow chart of a power detection and control method for a multi-split air conditioner provided in another embodiment of the present application; the process of determining the water tank capacity requirement coefficient mentioned above may include but is not limited to step S1610 and step S1620.

[0185] Step S1610, obtaining the water temperature of the water tank, the outdoor ambient temperature and the water tank operation mode;

[0186] Step S1620: determine the water tank capacity requirement coefficient according to the water temperature of the water tank, the outdoor ambient temperature and the water tank operation mode.

[0187] Since different water tank water temperatures, outdoor ambient temperatures and water tank operation modes have corresponding water tank capacity demand coefficients, the embodiment of the present application can determine the corresponding water tank capacity demand coefficient through the water tank water temperature, outdoor ambient temperature and water tank operation mode.

[0188] Based on the power detection and control methods for multi-split air conditioners of the above-mentioned embodiments, overall embodiments of the power detection and control methods for multi-split air conditioners of the present application are respectively proposed below.

[0189] First, to facilitate subsequent description, the following parameters are defined: T1 is the indoor ambient temperature; Ts is the indoor set temperature; Tk is the water temperature of the domestic water tank unit; T5U is the water temperature at the top of the water tank; and T5L is the water temperature at the bottom of the water tank.

[0190] 1. Overview of the operation logic of the power detection function:

[0191] The outdoor unit detects the total power of the outdoor unit and distributes its power to the operating terminal (indoor unit) according to relevant rules. The corresponding terminal (indoor unit) performs relevant calculations and corrections according to its own rules, and finally displays its power consumption.

[0192] 2. Control logic:

[0193] After the unit is powered on, the power detection starts working.

[0194] During the detection period, when the total power of the external unit is greater than the preset threshold, for example, the total power of the external unit P OOU >0.15kW, it will be allocated.

[0195] 2.1. Calculation of external machine power:

[0196] Total power of external machine P ODU It consists of testing compressor, motor, valve and auxiliary electric heating power. The calculation method is as follows:

[0197] P ODU =P motor +P 4WV +P PTC , where P ODU is the total power of the outdoor unit, P motor is the total power of the compressor and the motor, P 4WV is the power of the external valve, P PTC It is the auxiliary electric heating power of the outdoor unit.

[0198] 1) Total power P of the external compressor and motor motor , the power supply voltage and current are detected by the PFC circuit of the external main control board, and then according to the power formula P motor =U*I calculation, where the detection frequency can be 1 time / 2 seconds and the range can be 1 time / 2 to 15 seconds.

[0199] 2) External machine valve power P 4WV = p*N, count the number of valves N that are powered on according to the external machine mode, and then multiply it by the power of a single valve P1 to obtain the total power of the valve type. For example, if you need to count Figure 1 The power of the four-way valve shown is shown in Table 1 below:

[0200]

[0201] Table 1

[0202] 3) External auxiliary electric heating power P PTC =P2+P3, add the corresponding compressor electric heating belt power P2 and chassis electric heating belt power P3 according to the electric heating opening time of the outdoor unit, among which different models correspond to different compressor electric heating belt power P2 and chassis electric heating belt power P3.

[0203] The specific control of electric heating of the outdoor unit is:

[0204] The outdoor unit's electric heating belt must meet the following conditions when it switches from off to on:

[0205] (1) In standby mode:

[0206] A. If the outdoor environment temperature T4 temperature sensing package detects a≤T4≤b; the value range of a can be 0~4℃, for example 0℃, and the value range of b can be 3~6℃, for example 4℃, where the range a<b.

[0207] The timing starts from the compressor shutdown state. After t1 minutes (the value range of t1 can be 30-120 minutes, such as 60 minutes), if the temperature range is met, the chassis electric heating belt and the compressor electric heating belt are started. After starting, they must run for at least t2 minutes (the value range of t2 can be 3-15 minutes, such as 5 minutes) [wherein, within these t2 minutes, unless T4>c (the value range of c can be 6-12°C, such as 8°C), the electric heating will not be turned off], then stop for t1 minutes, and then judge that the temperature range is met, and start the electric heating belt. This cycle continues.

[0208] B. If T4<a, the chassis electric heating belt and the compressor electric heating belt are always turned on.

[0209] C. If T4<a, becomes a≤T4≤b, the electric heating belt is forced to run for t2 first, and then stop after t1 minute. If the running time exceeds t2 minutes, it will stop immediately.

[0210] (2) When the device is powered on:

[0211] If T4≤b, the chassis electric heating belt and the compressor electric heating belt are always turned on.

[0212] Conditions for turning the electric heating belt from on to off:

[0213] A. If the outdoor ambient temperature is higher than c, the value range of c can be 6 to 12°C, for example, 8°C, the chassis electric heating belt and the compressor electric heating belt will be forced to close.

[0214] 2.2 Power allocation and transmission

[0215] 1) Allocation rules

[0216] According to the total output capacity of the external machine Q c , and the capacity of each internal unit Q cn , Q tank , then the outdoor unit power P corresponding to each indoor unit is CN as follows:

[0217] a) In cooling and heating modes, the power of the outdoor unit is allocated to the indoor units of the air conditioner with energy demand, and the water tank does not participate. CN =P ODU *Q cn / Q c .

[0218] b) In hot water mode, the outdoor unit power is allocated to the water tank, and the air conditioner indoor unit does not participate. tank =P ODU .

[0219] c) Cooling + hot water mode

[0220] i. Full heat recovery 1, full heat recovery 2, the power of the outdoor unit is allocated to the refrigeration unit, and the water tank hot water does not participate in the outdoor unit power allocation, that is, the hot water capacity is not included in the total capacity and does not participate in the allocation, P CN =P ODU *Q cn / Q c .

[0221] ii. Partial heat recovery, the power of the outdoor unit is allocated to the refrigeration unit, and part of it is allocated to the hot water tank:

[0222] Internal unit: P CN =P ODU *Q cn / (∑Q cn -Q tank );

[0223] Water tank part: P tank =P ODU *Q tank / (∑Q cn -Q tank ).

[0224] d) In heating + hot water mode, the heat pump heats the water tank, i.e. the SV2 valve is powered on and works, and if the conditions for the water tank to work as a heat pump are met, the power of the outdoor unit is allocated to the water tank.

[0225] One of the following conditions:

[0226] (1) Exhaust temperature Tp>min[T5U, T5L]+k1, the exhaust temperature is greater than the minimum of the two water temperatures, k1 recommended value is 8, range 5~12℃;

[0227] (2) The saturation temperature corresponding to the high-pressure sensor is Tc>min[T5U, T5L]+k2, and the recommended value of k1 is 1, with a range of 1 to 5°C.

[0228] If the hot water conditions are not met, the outdoor unit power distribution is as follows:

[0229] P CN =P ODU *Q cn / Q c .

[0230] If the hot water conditions are met, the power distribution of the outdoor unit is as follows:

[0231] Internal unit: P CN=P ODU *Q cn / (∑Q cn +Q tank );

[0232] Internal unit: P CN =P ODU *Q tank / (∑Q cn +Q tank ).

[0233] 2) Indoor functions need to be calculated

[0234] (1) Air conditioner indoor unit

[0235] Refrigeration capacity requirement of each indoor unit Q cn =K_ΔT*K_fan*HP

[0236] Among them, K_ΔT is the difference coefficient between the indoor temperature and the set temperature, that is, the energy demand reference value mentioned above, and its value can be obtained by Fig.17 And the following Table 2 gives:

[0237] Temperature range Area A Zone B Zone C D Zone Zone E f zone K_ΔT value 3 2 1.5 1 0.5 0

[0238] Table 2

[0239] K_fan is the indoor unit wind speed coefficient, and its value can be obtained from the following Table 3:

[0240] According to the following table (when the wind speed is automatic, the high wind speed is used by default):

[0241]

[0242] Table 3

[0243] HP is as follows: the HP of the indoor unit corresponding to the nominal cooling capacity of 2000W is 0.8; the HP of the indoor unit corresponding to 2600W is 1.0; the HP of the indoor unit corresponding to 3200 / 3500W is 1.2; the HP of the indoor unit corresponding to 4800 / 5300W is 1.5; the HP of the indoor unit corresponding to 7000W is 2.5.

[0244] (2) Domestic water tank internal unit (only for hot water production)

[0245] External water tank capacity requirement Q W =H W * External water tank capacity requirement coefficient;

[0246] (1) The capacity requirement coefficient of the external water tank is related to the water temperature Tk, the outdoor ambient temperature T4 and the water tank operation mode (normal, energy-saving, fast). The water tank sends the operating mode to the external unit.

[0247] (2)HW is the rated capacity of the external water tank, H W Related to the water tank capacity, sent from the water tank to the external unit

[0248] 1) Calculation of external water tank capacity requirement coefficient under various water tank operation modes:

[0249] The normal mode capacity requirement coefficient is A W ; The energy-saving mode capacity requirement coefficient is A W_eco ; The rapid mode capacity requirement coefficient is A W_turbo .

[0250] (1) The value of the normal mode capacity requirement coefficient Aw is obtained from Table 4:

[0251]

[0252] Table 4

[0253] (2) Energy-saving mode capacity requirement coefficient A W_eco

[0254] Energy saving mode: A W_eco =A W *0.8

[0255] (3) Rapid mode capacity requirement coefficient A W_turbo

[0256] Rapid heating: A W_turbo Depending on the Tk value, you can Fig.18 Calculation, A W_turbo The external unit parameter value can be set to 45°C.

[0257] 2) Power transmission

[0258] The rated power of the outdoor unit, the total system power, and the allocated power of the outdoor unit are sent by the outdoor unit to the corresponding indoor unit and are sent according to a preset sending period, wherein the preset sending period can be set arbitrarily, for example, 30 seconds.

[0259] The outdoor unit transmits the outdoor unit power to the indoor unit (including the water tank) through the indoor and outdoor communication protocol. The indoor unit adds the calculated indoor unit power and the received outdoor unit power to obtain the total power consumed by the water tank and performs power statistics.

[0260] Based on the power detection and control method of the multi-split air conditioner in the above-mentioned embodiments, the embodiment of the present application can split the power consumption of each working indoor unit in the outdoor unit and the working power of the water tank itself according to the characteristics of the multi-tube multi-split unit and the indoor unit requirements and corresponding refrigeration rules, and accumulate and calculate the power consumption of the water tank to meet customer needs and government subsidy requirements.

[0261] Based on the power detection method of the heat pump multi-connected system in the above-mentioned embodiments, various embodiments of the controller, the heat pump multi-connected system, the computer-readable storage medium and the computer program product of the present application are respectively proposed below.

[0262] like Fig.19 As shown, Fig.19 700 is a schematic diagram of a controller for executing a method for detecting power in a heat pump multi-connected system according to an embodiment of the present application. The controller 700 implemented in the present application includes: a processor 710, a memory 720, and a computer program stored in the memory 720 and executable on the processor 710, wherein: Fig.19 In the figure, a processor 710 and a memory 720 are taken as an example.

[0263] The processor 710 and the memory 720 may be connected via a bus or other means. Fig.19 The example of connecting through bus is taken in the following.

[0264] The memory 720, as a non-transitory computer-readable storage medium, can be used to store non-transitory software programs and non-transitory computer executable programs. In addition, the memory 720 may include a high-speed random access memory, and may also include a non-transitory memory, such as at least one disk storage device, a flash memory device, or other non-transitory solid-state storage device. In some embodiments, the memory 720 optionally includes a memory 720 remotely arranged relative to the processor 710, and these remote memories 720 can be connected to the controller 700 via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0265] Those skilled in the art will understand that Fig.19 The device structure shown in the figure does not constitute a limitation on the controller 700, and may include more or less components than shown in the figure, or combine certain components, or arrange the components differently.

[0266] exist Fig.19 In the controller 700 shown, the processor 710 can be used to call the control program stored in the memory 720, so as to implement the above-mentioned power detection method of the heat pump multi-connected system. Specifically, the non-transient software program and instructions required to implement the power detection method of the heat pump multi-connected system of the above-mentioned embodiment are stored in the memory 720, and when executed by the processor 710, the power detection method of the heat pump multi-connected system of the above-mentioned embodiment is executed.

[0267] It is worth noting that since the controller 700 of the embodiment of the present application can execute the power detection method of the heat pump multi-split system of any of the above-mentioned embodiments, the specific implementation manner and technical effects of the controller 700 of the embodiment of the present application can refer to the specific implementation manner and technical effects of the power detection method of the heat pump multi-split system of any of the above-mentioned embodiments.

[0268] In addition, an embodiment of the present application further provides a heat pump multi-connected system, which includes the controller of the above embodiment.

[0269] It is worth noting that since the heat pump multi-split system of the embodiment of the present application includes the controller of the above-mentioned embodiment, and the controller of the above-mentioned embodiment can execute the power detection method of the heat pump multi-split system of any of the above-mentioned embodiments, the specific implementation methods and technical effects of the heat pump multi-split system of the embodiment of the present application can refer to the specific implementation methods and technical effects of the power detection method of the heat pump multi-split system of any of the above-mentioned embodiments.

[0270] In addition, an embodiment of the present application further provides a computer-readable storage medium, which stores computer-executable instructions, and the computer-executable instructions are used to execute the above-mentioned power detection method for the heat pump multi-connected system. Figures 2 to 16 The method steps in .

[0271] It is worth noting that since the computer-readable storage medium of the embodiment of the present application can execute the power detection method of the heat pump multi-connected system of any of the above-mentioned embodiments, the specific implementation methods and technical effects of the computer-readable storage medium of the embodiment of the present application can refer to the specific implementation methods and technical effects of the power detection method of the heat pump multi-connected system of any of the above-mentioned embodiments.

[0272] In addition, an embodiment of the present application further provides a computer program product, including a computer program or computer instructions, the computer program or computer instructions are stored in a computer-readable storage medium, the processor of the computer device reads the computer program or computer instructions from the computer-readable storage medium, and the processor executes the computer program or computer instructions, so that the computer device executes the above-mentioned power detection method for the heat pump multi-connected system. For example, the above-described Figures 2 to 16 The method steps in .

[0273] It is worth noting that since the computer program product of the embodiment of the present application can execute the power detection method of the heat pump multi-split system of any of the above-mentioned embodiments, the specific implementation methods and technical effects of the computer program product of the embodiment of the present application can refer to the specific implementation methods and technical effects of the power detection method of the heat pump multi-split system of any of the above-mentioned embodiments.

[0274] It will be appreciated by those skilled in the art that all or some of the steps and systems in the disclosed method above may be implemented as software, firmware, hardware and appropriate combinations thereof. Some physical components or all physical components may be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or may be implemented as hardware, or may be implemented as an integrated circuit, such as an application specific integrated circuit. Such software may be distributed on a computer-readable medium, which may include a computer storage medium (or a non-transitory medium) and a communication medium (or a temporary medium). As known to those skilled in the art, the term computer storage medium includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules or other data). Computer storage media include, but are not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, disk storage or other magnetic storage devices, or any other medium that may be used to store desired information and may be accessed by a computer. Furthermore, it is well known to those skilled in the art that communication media typically include computer readable instructions, data structures, program modules, or other data in a modulated data signal such as a carrier wave or other transport mechanism, and may include any information delivery media.

[0275] It should be understood that in the present application, "at least one (item)" means one or more, and "plurality" means two or more. "And / or" is used to describe the association relationship of associated objects, indicating that three relationships may exist. For example, "A and / or B" can mean: only A exists, only B exists, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally indicates that the objects associated before and after are in an "or" relationship. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single or plural items. For example, at least one of a, b or c can mean: a, b, c, "a and b", "a and c", "b and c", or "a and b and c", where a, b, c can be single or multiple.

[0276] In several embodiments provided in the present application, it should be understood that the disclosed systems, apparatuses and methods can be implemented in other ways. For example, the apparatus embodiments described above are merely schematic, for example, the division of units is only a logical function division, and there may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of apparatuses or units, which can be electrical, mechanical or other forms. The units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the scheme of this embodiment.

[0277] It should also be understood that the various implementations provided in the embodiments of the present application can be combined arbitrarily to achieve different technical effects.

[0278] The above is a specific description of the preferred implementation of the present application, but the present application is not limited to the above implementation mode. Technical personnel familiar with the field can also make various equivalent modifications or substitutions under the shared conditions without violating the spirit of the present application. These equivalent modifications or substitutions are all included in the scope defined by the claims of the present application.

Claims

1. A method for detecting the amount of electricity in a heat pump multi-connected system, characterized in that: The heat pump multi-connected system comprises an outdoor unit, an air conditioner indoor unit and a domestic water tank indoor unit, the outdoor unit comprises a compressor, an outdoor heat exchanger and a valve assembly, the valve assembly comprises a first multi-way valve, a second multi-way valve and a third multi-way valve, the first multi-way valve is connected to the air conditioner indoor unit and the compressor, the second multi-way valve is connected to the compressor and the domestic water tank indoor unit, and the third multi-way valve is connected to the compressor and the outdoor heat exchanger; the method comprises: Acquire the working mode of the heat pump multi-connected system, and determine the target indoor unit that participates in the outdoor unit power distribution from the air conditioner indoor unit and the domestic water tank indoor unit according to the working mode; Determine the sub-energy requirements of each of the target internal machines, and determine the total energy requirements of all the target internal machines according to the multiple sub-energy requirements; Obtaining the total outdoor power of the outdoor unit, and determining the outdoor unit allocation power allocated by the outdoor unit to the target indoor unit according to the total outdoor power, the total energy demand and the sub-energy demand; The power consumption of the target indoor unit is determined according to the allocated power of the outdoor unit.

2. The method according to claim 1, characterized in that Determining the target indoor unit that participates in the outdoor unit power distribution from the air conditioner indoor unit and the domestic water tank indoor unit according to the working mode includes one of the following: When the working mode is a cooling mode or a heating mode, determining the air conditioner indoor unit as a target indoor unit participating in outdoor unit power distribution; When the working mode is a hot water making mode, determining the domestic water tank indoor unit as a target indoor unit participating in the outdoor unit power distribution; When the working mode is the first cooling and hot water making mode, determining the air conditioner indoor unit as a target indoor unit participating in outdoor unit power distribution; When the working mode is the second cooling and hot water making mode, determining the air conditioner indoor unit as a target indoor unit participating in outdoor unit power distribution; When the working mode is the third cooling and hot water making mode, determining the air conditioner indoor unit and the domestic water tank indoor unit as target indoor units participating in the outdoor unit power distribution; When the working mode is the heating and hot water mode, the target indoor unit participating in the outdoor unit power distribution is determined from the air conditioner indoor unit and the domestic water tank indoor unit according to the exhaust temperature and the high-pressure saturation temperature.

3. The method according to claim 2, characterized in that The step of determining the target indoor unit that participates in the outdoor unit power distribution from the air conditioner indoor unit and the domestic water tank indoor unit according to the exhaust temperature and the high-pressure saturation temperature includes one of the following: When the exhaust temperature is greater than a first preset value and / or the high pressure saturation temperature is greater than a second preset value, the air conditioner indoor unit and the domestic water tank indoor unit are determined as target indoor units participating in the outdoor unit power distribution, wherein the first preset value and the second preset value are both determined by the minimum value of the water temperature at the upper part of the water tank and the water temperature at the lower part of the water tank; When the exhaust temperature is less than or equal to a first preset value and the high-pressure saturation temperature is less than or equal to a second preset value, the air-conditioning indoor unit is determined to be a target indoor unit participating in outdoor unit power distribution.

4. The method according to claim 1, characterized in that The obtaining of the total power of the outdoor unit includes: Obtaining the total power of the compressor and the motor of the outdoor unit, the valve power of the outdoor unit, and the auxiliary electric heating power of the outdoor unit; The total power of the two, the valve power of the outdoor unit and the auxiliary electric heating power of the outdoor unit are superimposed to obtain the total power of the outdoor unit.

5. The method according to claim 4, characterized in that The total power of the two is determined by the following steps: Detect the power supply voltage and current through the external main control board; The total power of the compressor and the motor is calculated according to the supply voltage and the supply current.

6. The method according to claim 4, characterized in that The power of the external machine valve is determined by the following steps: Determine the number of external unit valves in the energized working state; The external valve power of the outdoor unit is calculated according to the number of the external valves and the preset power-on power of a single valve.

7. The method according to claim 4, characterized in that The external auxiliary electric heating power is determined by the following steps: Determine the working status of the compressor electric heating belt and the chassis electric heating belt; Determine the compressor electric heating belt power and the chassis electric heating belt power according to the working state; The compressor electric heating belt power and the chassis electric heating belt power are superimposed to obtain the outdoor unit auxiliary electric heating power of the outdoor unit.

8. The method according to claim 7, characterized in that The step of determining the working status of the compressor electric heating belt and the chassis electric heating belt comprises: Get the outdoor ambient temperature; The working states of the compressor electric heating belt and the chassis electric heating belt are determined according to the outdoor ambient temperature.

9. The method according to claim 8, characterized in that The step of determining the working state of the compressor electric heating belt and the chassis electric heating belt according to the outdoor ambient temperature includes: Determining that the outdoor unit is in a standby state; When the outdoor ambient temperature is greater than or equal to the first preset temperature and less than or equal to the second preset temperature, the following cyclic operation is performed: the compressor electric heating belt and the chassis electric heating belt are started and run continuously for a first preset time, and then the compressor electric heating belt and the chassis electric heating belt are stopped and stopped continuously for a second preset time; When the outdoor ambient temperature is lower than the first preset temperature, the compressor electric heating belt and the chassis electric heating belt are kept started.

10. The method according to claim 8, characterized in that The step of determining the working state of the compressor electric heating belt and the chassis electric heating belt according to the outdoor ambient temperature also includes: Determining that the outdoor unit is in a powered-on state; When the outdoor ambient temperature is less than or equal to a second preset temperature, the compressor electric heating belt and the chassis electric heating belt are kept started; When the outdoor ambient temperature is greater than a third preset temperature, the compressor electric heating belt and the chassis electric heating belt are turned off, wherein the third preset temperature is greater than the second preset temperature.

11. The method according to claim 1, characterized in that: The energy required for the indoor unit of the air conditioner is determined by the following steps: Obtaining the energy demand reference value, wind speed coefficient and horsepower of the air conditioner indoor unit; The sub-energy demand of the air conditioner indoor unit is determined according to the energy demand reference value, the wind speed coefficient and the horsepower number.

12. The method according to claim 11, characterized in that The energy demand reference value is determined by the following steps: Get the indoor ambient temperature; Determining a capacity requirement range of the air conditioner indoor unit according to a temperature difference between the indoor ambient temperature and the indoor set temperature; The energy requirement reference value is determined according to the capacity requirement interval, wherein there is a positive correlation between the energy requirement reference value and the temperature difference corresponding to the capacity requirement interval.

13. The method according to claim 11, characterized in that The wind speed coefficient is determined by the following steps: Obtaining the wind speed of the indoor fan of the indoor unit of the air conditioner; The wind speed coefficient is determined according to the wind speed of the indoor fan, wherein there is a positive correlation between the wind speed coefficient and the wind speed of the indoor fan.

14. The method according to claim 1, characterized in that The energy required for the machine in the domestic water tank is determined by the following steps: Obtain the rated capacity of the water tank and the water tank capacity requirement coefficient of the domestic water tank internal unit; The energy requirement of the machine in the domestic water tank is determined according to the rated capacity of the water tank and the water tank capacity requirement coefficient.

15. The method according to claim 14, characterized in that The water tank capacity requirement coefficient is determined by the following steps: Obtain water tank water temperature, outdoor ambient temperature and water tank operation mode; The water tank capacity requirement coefficient is determined according to the water temperature of the water tank, the outdoor ambient temperature and the water tank operation mode.

16. A controller, characterized in that: include: A memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the power detection method for a heat pump multi-connected system as described in any one of claims 1 to 15 when executing the computer program.

17. A heat pump multi-connected system, characterized in that: Comprising a controller as claimed in claim 16.

18. A computer-readable storage medium, characterized in that: Computer executable instructions are stored, and the computer executable instructions are used to execute the power detection method of the heat pump multi-connected system as described in any one of claims 1 to 15.

19. A computer program product comprising a computer program or computer instructions, characterized in that The computer program or the computer instruction is stored in a computer-readable storage medium, and the processor of a computer device reads the computer program or the computer instruction from the computer-readable storage medium. The processor executes the computer program or the computer instruction, so that the computer device executes the power detection method for a heat pump multi-connected system as described in any one of claims 1 to 15.

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