Multi-split heat pump system, power measurement method therefor, and storage medium

Abstract

Provided in the embodiments of the present application are a multi-split heat pump system, a power measurement method therefor, and a storage medium. The power measurement method for the multi-split heat pump system comprises: acquiring the working mode of the multi-split heat pump system and, on the basis of the working mode, determining from among air-conditioning indoor units and a domestic hot water tank indoor unit target indoor units to participate in outdoor unit power allocation (S210); determining a sub-energy demand of each target indoor unit and, on the basis of the multiple sub-energy demands, determining a total energy demand of all of the target indoor units (S220); acquiring the total outdoor unit power of an outdoor unit and, on the basis of the total outdoor unit power, the total energy demand, and the sub-energy demands, determining the outdoor unit allocation power allocated by the outdoor unit to the target indoor units (S230); and, on the basis of the outdoor unit allocation power, determining the power consumption of the target indoor units (S240).

Description

Heat pump multi-connected system, power consumption detection method thereof and storage medium

[0001] Cross-reference to Related Applications

[0002] The present application claims priority to the Chinese patent application No. 202411237242.2, filed on September 4, 2024, entitled "Heat pump multi-connected system, power consumption detection method thereof and storage medium", the content of the above patent application is incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of heat pump multi-connected system, in particular to a heat pump multi-connected system, a power consumption detection method thereof and a storage medium. BACKGROUND

[0004] In the related art, with the promotion of energy-saving policies in some regions and countries, the display of the power consumption of the indoor unit can help consumers to better understand the energy consumption, thereby guiding consumers to use energy-savingly, and the government will give a certain amount of subsidies. Specifically, for the current multi-group pipe multi-connected air conditioner, since the outdoor unit is powered, the power consumption of the outdoor unit generates refrigeration and heating capacity which is delivered to each indoor unit through the refrigerant. It is difficult to calculate the power contribution of the indoor unit which is working in the system, so it is difficult to allocate the corresponding power, and it is difficult to detect the power consumption. Moreover, there is no technology that can display the individual power consumption of each indoor unit when it is working.

[0005] In addition, the heat pump multi-connected system includes a domestic water tank, and the heat exchange of water and refrigerant has special properties. Only the refrigerant that meets certain temperature and pressure state conditions can exchange heat with water. Therefore, it is more complex to evaluate the power consumption of domestic hot water. SUMMARY

[0006] The present application aims to at least partially solve one of the technical problems existing in the prior art. To this end, the present application provides a heat pump multi-connected system, a power consumption detection method thereof and a storage medium, which can display the power consumption of the indoor unit, thereby meeting the use requirements of customers.

[0007] In a first aspect, an embodiment of the present application provides a heat pump multi-connected system, which includes an outdoor unit, an air conditioner indoor unit and a domestic water tank indoor unit. The outdoor unit includes a compressor, an outdoor heat exchanger and a valve assembly. The valve assembly includes 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. The third multi-way valve is connected to the compressor and the outdoor heat exchanger. The method includes:

[0008] obtaining a working mode of the heat pump multi-connected system, determining a target indoor unit participating in outdoor unit power distribution from the air conditioner indoor unit and the water tank indoor unit according to the working mode;

[0009] determining a sub-energy requirement of each target indoor unit, determining a total energy requirement of all target indoor units according to a plurality of sub-energy requirements;

[0010] obtaining an outdoor unit total power of the outdoor unit, determining an outdoor unit distribution power of the outdoor unit distributed to the target indoor unit according to the outdoor unit total power, the total energy requirement and the sub-energy requirement; and

[0011] determining an electricity consumption of the target indoor unit according to the outdoor unit distribution power.

[0012] According to some embodiments of the present application, the target indoor unit participating in outdoor unit power distribution is determined from the air conditioner indoor unit and the water tank indoor unit according to the working mode, including one of the following:

[0013] when the working mode is a cooling mode or a heating mode, the air conditioner indoor unit is determined as the target indoor unit participating in outdoor unit power distribution;

[0014] when the working mode is a hot water heating mode, the water tank indoor unit is determined as the target indoor unit participating in outdoor unit power distribution;

[0015] when the working mode is a first cooling and hot water heating mode, the air conditioner indoor unit is determined as the target indoor unit participating in outdoor unit power distribution;

[0016] when the working mode is a second cooling and hot water heating mode, the air conditioner indoor unit is determined as the target indoor unit participating in outdoor unit power distribution;

[0017] when the working mode is a third cooling and hot water heating mode, the air conditioner indoor unit and the water tank indoor unit are determined as the target indoor units participating in outdoor unit power distribution;

[0018] when the working mode is a heating and hot water heating mode, the target indoor unit participating in outdoor unit power distribution is determined from the air conditioner indoor unit and the water tank indoor unit according to the exhaust gas temperature and the high pressure saturation temperature.

[0019] According to some embodiments of the present application, the target indoor unit participating in outdoor unit power distribution is determined from the air conditioner indoor unit and the water tank indoor unit according to the exhaust gas temperature and the high pressure saturation temperature, including one of the following:

[0020] determining that the air conditioner indoor unit and the domestic water tank indoor unit are target indoor units participating in power distribution of the outdoor unit 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, wherein the first preset value and the second preset value are determined by the minimum value of the water tank upper water temperature and the water tank lower water temperature;

[0021] determining that the air conditioner indoor unit is a target indoor unit participating in power distribution of the outdoor unit 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.

[0022] According to some embodiments of the present application, the total power of the outdoor unit is obtained by:

[0023] the total power of the compressor and the motor, the outdoor valve power and the outdoor auxiliary electric heating power of the outdoor unit are obtained; and

[0024] the total power, the outdoor valve power and the outdoor auxiliary electric heating power are superimposed to obtain the total power of the outdoor unit.

[0025] According to some embodiments of the present application, the total power of the compressor and the motor is obtained by:

[0026] the supply voltage and the supply current are detected by the outdoor master control board; and

[0027] the total power of the compressor and the motor is calculated according to the supply voltage and the supply current.

[0028] According to some embodiments of the present application, the outdoor valve power is obtained by:

[0029] the number of outdoor valves in the power-on working state is determined; and

[0030] the outdoor valve power of the outdoor unit is calculated according to the number of outdoor valves and the preset power-on power of a single valve.

[0031] According to some embodiments of the present application, the outdoor auxiliary electric heating power is obtained by:

[0032] the working states of the compressor electric heating band and the chassis electric heating band are determined;

[0033] the compressor electric heating band power and the chassis electric heating band power are determined according to the working states; and

[0034] the compressor electric heating band power and the chassis electric heating band power are superimposed to obtain the outdoor auxiliary electric heating power of the outdoor unit.

[0035] According to some embodiments of the present application, the determining the working states of the compressor electric heating band and the bottom plate electric heating band comprises:

[0036] obtaining an outdoor environment temperature; and

[0037] determining the working states of the compressor electric heating band and the bottom plate electric heating band according to the outdoor environment temperature.

[0038] According to some embodiments of the present application, the determining the working states of the compressor electric heating band and the bottom plate electric heating band according to the outdoor environment temperature comprises:

[0039] determining that the outdoor unit is in a standby state;

[0040] when the outdoor environment temperature is greater than or equal to a first preset temperature and less than or equal to a second preset temperature, performing a loop operation of starting the compressor electric heating band and the bottom plate electric heating band and continuously operating for a first preset time length, and then stopping the compressor electric heating band and the bottom plate electric heating band and continuously stopping for a second preset time length; and

[0041] when the outdoor environment temperature is less than the first preset temperature, keeping the compressor electric heating band and the bottom plate electric heating band started.

[0042] According to some embodiments of the present application, the determining the working states of the compressor electric heating band and the bottom plate electric heating band according to the outdoor environment temperature further comprises:

[0043] determining that the outdoor unit is in a start-up state;

[0044] when the outdoor environment temperature is less than or equal to the second preset temperature, keeping the compressor electric heating band and the bottom plate electric heating band started; and

[0045] when the outdoor environment temperature is greater than a third preset temperature, closing the compressor electric heating band and the bottom plate electric heating band, wherein the third preset temperature is greater than the second preset temperature.

[0046] According to some embodiments of the present application, the sub-energy requirement of the air conditioner indoor unit is determined by the following steps:

[0047] obtaining an energy requirement reference value, a wind speed coefficient and a number of matches of the air conditioner indoor unit; and

[0048] determining the sub-energy requirement of the air conditioner indoor unit according to the energy requirement reference value, the wind speed coefficient and the number of matches.

[0049] According to some embodiments of the present application, the energy requirement reference value is determined by the following steps:

[0050] obtaining an indoor environment temperature;

[0051] determining a capacity demand range of the air conditioner indoor unit according to the temperature difference between the indoor environment temperature and the indoor set temperature; and

[0052] determining the energy demand reference value according to the capacity demand range, wherein the energy demand reference value and the temperature difference corresponding to the capacity demand range are in a positive correlation.

[0053] According to some embodiments of the present application, the wind speed coefficient is determined by the following steps:

[0054] obtaining a wind speed of an indoor unit fan of the air conditioner indoor unit; and

[0055] determining the wind speed coefficient according to the wind speed of the indoor unit fan, wherein the wind speed coefficient and the wind speed of the indoor unit fan are in a positive correlation.

[0056] According to some embodiments of the present application, the sub energy demand of the domestic water tank indoor unit is determined by the following steps:

[0057] obtaining a water tank rated capacity and a water tank capacity demand coefficient of the domestic water tank indoor unit; and

[0058] determining the sub energy demand of the domestic water tank indoor unit according to the water tank rated capacity and the water tank capacity demand coefficient.

[0059] According to some embodiments of the present application, the water tank capacity demand coefficient is determined by the following steps:

[0060] obtaining a water tank water temperature, an outdoor environment temperature and a water tank operation mode; and

[0061] determining the water tank capacity demand coefficient according to the water tank water temperature, the outdoor environment temperature and the water tank operation mode.

[0062] In a second aspect, embodiments of the present application provide 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 computer program to perform the power detection method of the heat pump multi-contact system of the first aspect.

[0063] In a third aspect, embodiments of the present application provide a heat pump multi-contact system, comprising the controller of the second aspect.

[0064] In a fourth aspect, embodiments of the present application provide a computer readable storage medium, storing computer executable instructions for performing the power detection method of the heat pump multi-contact system of the first aspect.

[0065] In a fifth aspect, an embodiment of the present application provides a computer program product, including a computer program or computer instructions, wherein the computer program or the computer instructions are stored in a computer readable storage medium, a processor of a computer device reads the computer program or the computer instructions from the computer readable storage medium, and the processor executes the computer program or the computer instructions, so that the computer device executes the power detection method of the heat pump multi-connected system according to the first aspect.

[0066] According to the technical scheme of the embodiment of the present application, at least the following beneficial effects are achieved: the embodiment of the present application provides a way that each indoor unit terminal can display its own power consumption, first, according to the working mode of the heat pump multi-connected system, the target indoor unit participating in the outdoor unit power distribution is determined from the air conditioner indoor unit and the domestic water tank, then according to the total power of the outdoor unit, the total energy demand of all target indoor units and the sub energy demand of each target indoor unit, the outdoor unit distribution power of the outdoor unit distributed to the target indoor unit is determined, and finally the power consumption of the target indoor unit is calculated based on the outdoor unit distribution power; therefore, the embodiment of the present application determines the target indoor unit participating in the outdoor unit power distribution through the working mode of the multi-connected system, then determines the outdoor unit distribution power of each air conditioner indoor unit through the energy demand distribution, and further calculates the individual power consumption of each air conditioner indoor unit, so as to realize the purpose that the indoor unit terminal can display its power consumption, thereby meeting the use demand of the customer and the government subsidy requirement.

[0067] Additional aspects and advantages of the present application will be made apparent from the following description. BRIEF DESCRIPTION OF DRAWINGS

[0068] The accompanying drawings are included to provide a further understanding of the technical scheme of the present application, and constitute a part of the specification, and are used together with the embodiments of the present application to explain the technical scheme of the present application, and do not constitute a limitation on the technical scheme of the present application.

[0069] FIG. 1 is a structural schematic diagram of a heat pump multi-connected system according to an embodiment of the present application;

[0070] FIG. 2 is a flowchart of a power detection method of a heat pump multi-connected system according to an embodiment of the present application;

[0071] FIG. 3 is a flowchart of a power detection method of a heat pump multi-connected system according to another embodiment of the present application;

[0072] FIG. 4 is a flowchart of a power detection method of a heat pump multi-connected system according to another embodiment of the present application;

[0073] FIG. 5 is a flowchart of a power detection method of a heat pump multi-connected system according to another embodiment of the present application;

[0074] Fig. 6 is a flow chart of a method for detecting power consumption of a heat pump multi-contact system according to another embodiment of the present application;

[0075] Fig. 7 is a flow chart of a method for detecting power consumption of a heat pump multi-contact system according to another embodiment of the present application;

[0076] Fig. 8 is a flow chart of a method for detecting power consumption of a heat pump multi-contact system according to another embodiment of the present application;

[0077] Fig. 9 is a flow chart of a method for detecting power consumption of a heat pump multi-contact system according to another embodiment of the present application;

[0078] Fig. 10 is a flow chart of a method for detecting power consumption of a heat pump multi-contact system according to another embodiment of the present application;

[0079] Fig. 11 is a flow chart of a method for detecting power consumption of a heat pump multi-contact system according to another embodiment of the present application;

[0080] Fig. 12 is a flow chart of a method for detecting power consumption of a heat pump multi-contact system according to another embodiment of the present application;

[0081] Fig. 13 is a flow chart of a method for detecting power consumption of a heat pump multi-contact system according to another embodiment of the present application;

[0082] Fig. 14 is a flow chart of a method for detecting power consumption of a heat pump multi-contact system according to another embodiment of the present application;

[0083] Fig. 15 is a flow chart of a method for detecting power consumption of a heat pump multi-contact system according to another embodiment of the present application;

[0084] Fig. 16 is a flow chart of a method for detecting power consumption of a heat pump multi-contact system according to another embodiment of the present application;

[0085] Fig. 17 is a diagram for determining a capacity demand range of an indoor unit of an air conditioner according to an embodiment of the present application;

[0086] Fig. 18 is a diagram for determining a capacity demand range of an indoor unit of a domestic water tank according to an embodiment of the present application;

[0087] Fig. 19 is a diagram of a controller for performing a method for detecting power consumption of a heat pump multi-contact system according to an embodiment of the present application. DETAILED DESCRIPTION

[0088] Embodiments of the present application are described in detail below with reference to the attached drawings, wherein like or similar elements are denoted by the same or similar reference numerals throughout the drawings. The embodiments described below are examples of the present application, and are not intended to limit the present application.

[0089] In the description of the present application, it should be understood that the orientation description, such as the orientation or position relationship indicated by the upper, lower, front, rear, left, right and the like, is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0090] In the description of the present application, the meaning of several is one or more, the meaning of multiple is more than two, greater than, less than, more than and the like are understood as not including the number, above, below, within and the like are understood as including the number. If it is described as first, second, it is only for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or the order of technical features indicated.

[0091] In the description of the present application, unless otherwise explicitly limited, the words such as setting, installing, connecting and the like should be broadly understood, and those skilled in the art can reasonably determine the specific meaning of the above words in the present application in combination with the specific content of the technical solution.

[0092] In some cases, with the promotion of energy-saving policies in some regions and countries, the display of the power consumption of the indoor unit end can promote the consumer to more visually understand the energy consumption, thereby guiding the consumer to save energy, and the government will give a certain amount of subsidies. Specifically, for the current multi-group pipe multi-split air conditioner, since the outdoor unit is powered, the power consumption of the outdoor unit generates refrigeration and heating capacity which is delivered to each indoor unit end through the refrigerant. For the indoor unit which is working among the air conditioners, 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. At present, there is no technology that can display the separate power consumption of each indoor unit end when it is working.

[0093] In addition, the heat pump multi-contact system includes a domestic water tank, and the heat exchange of water and refrigerant has special properties. Only the refrigerant that meets certain temperature and pressure state conditions can exchange heat with water, so it is more complex to evaluate the power consumption of domestic hot water.

[0094] Based on the above situation, the embodiments of the present application propose a heat pump multi-contact system, a power detection method and a storage medium, which aims to realize that the indoor unit end can display its power consumption, thereby meeting the use demand of the customer.

[0095] The various embodiments of the heat pump multi-contact system of the present application will be further described below in conjunction with the drawings.

[0096] As shown in FIG. 1, FIG. 1 is a structural schematic diagram of a heat pump multi-contact system provided by an embodiment of the present application.

[0097] In an embodiment, the heat pump multi-contact system comprises an indoor side device and an outdoor side device, wherein the indoor side device comprises the air conditioner indoor unit 100 and the water tank indoor unit 300 shown in FIG. 1, the outdoor side device comprises the outdoor unit shown in FIG. 1, and the outdoor unit, the air conditioner indoor unit 100 and the water tank indoor unit 300 are connected through refrigerant pipes; wherein the outdoor unit is provided with an outdoor heat exchanger 200, a compressor 400 and a valve assembly, the compressor 400 is connected to the outdoor heat exchanger 200, the air conditioner indoor unit 100 and the water tank indoor unit 300 through the valve assembly.

[0098] In an embodiment, as shown in FIG. 1, the valve assembly comprises 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 suction port of the compressor 400 and the air conditioner indoor unit 100, the second multi-way valve 520 is connected to the exhaust port of the compressor 400 and the water tank indoor unit 300, and the third multi-way valve 530 is connected to the exhaust port, the suction port of the compressor 400 and one end of the outdoor heat exchanger 200.

[0099] It can be understood that the first multi-way valve 510, the second multi-way valve 520 and the third multi-way valve 530 described above can be three-way valves or four-way valves, and the embodiments of the present application do not make specific limitations thereon.

[0100] In an embodiment, as shown in FIG. 1, the valve assembly further comprises but is not limited to a main expansion valve 610, and the other end of the outdoor heat exchanger 200 is connected to the air conditioner indoor unit 100 and the water tank indoor unit 300 through the main expansion valve 610.

[0101] In an embodiment, the compressor 400 can be connected to the first end of the water tank indoor unit 300 through the second multi-way valve 520, the second end of the water tank indoor unit 300 is connected to the first end of the air conditioner indoor unit 100, the second end of the air conditioner 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 conditioner indoor unit 100 and the second end of the water tank indoor unit 300 through the main expansion valve 610, and the second end of the air conditioner indoor unit 100 is connected to the first multi-way valve 510.

[0102] In an embodiment, as shown in FIG. 1, the valve assembly further comprises but is not limited to a plurality of branch 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 conditioner indoor unit 100 and the water tank indoor unit 300 through the branch expansion valves 620.

[0103] Based on the hardware structure of the heat pump multi-connected system of each of the above embodiments, the following respectively proposes each embodiment of the power consumption detection method of the heat pump multi-connected system of the present application.

[0104] As shown in FIG. 2, FIG. 2 is a flow chart of the power consumption detection method of the heat pump multi-connected system according to an embodiment of the present application; the power consumption detection method of the heat pump multi-connected system can include but is not limited to step S210, step S220, step S230 and step S240.

[0105] Step S210, obtaining the working mode of the heat pump multi-connected system, and 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 working mode;

[0106] Step S220, determining the sub-energy demand of each target indoor unit, and determining the total energy demand of all target indoor units according to a plurality of sub-energy demands;

[0107] Step S230, obtaining the total power of the outdoor unit, and determining the outdoor unit distribution power of the outdoor unit allocated to the target indoor unit according to the total power of the outdoor unit, the total energy demand and the sub-energy demand;

[0108] Step S240, determining the power consumption of the target indoor unit according to the outdoor unit distribution power.

[0109] In an embodiment, the embodiment of the present application will obtain the working mode of the heat pump multi-connected system, since different working modes have corresponding target indoor units participating in the outdoor unit power distribution, so that the embodiment of the present application can determine 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 working mode; then, the embodiment of the present application will determine the capacity demand of each target indoor unit, i.e. the energy demand, so as to superimpose a plurality of sub-energy demands to obtain the total energy demand of all target indoor units; then, the embodiment of the present application will obtain the total power of the outdoor unit, so as to calculate the proportion of the sub-energy demand of a certain target indoor unit in the total energy demand of all target indoor units in the case that the target indoor unit needs to display the power consumption, and then calculate the outdoor unit distribution power of the outdoor unit allocated to the target indoor unit according to the total power of the outdoor unit by multiplication according to the proportion, and calculate the power consumption of the target indoor unit according to the outdoor unit distribution power.

[0110] It is worth noting that the embodiment of the present application determines the target indoor unit participating in the outdoor unit power distribution through the working mode of the multi-connected system, then determines the outdoor unit distribution power of each air conditioner indoor unit through the energy demand distribution, and further calculates the individual power consumption of each air conditioner indoor unit, so as to realize the purpose that the indoor unit end can display its power consumption, thereby meeting the use demand of customers and the government subsidy requirement.

[0111] In addition, as shown in FIG. 3, which is a flowchart of the power detection method of the heat pump multi-contact system according to an embodiment of the present application, the target indoor unit participating in the power distribution of the outdoor unit in step S210 can include, but is not limited to, step S310, step S320, step S330, step S340, step S350, and step S360.

[0112] In step S310, when the working mode is the cooling mode or the heating mode, the air conditioner indoor unit is determined as the target indoor unit participating in the power distribution of the outdoor unit.

[0113] In step S320, when the working mode is the heating water mode, the water tank indoor unit is determined as the target indoor unit participating in the power distribution of the outdoor unit.

[0114] In step S330, when the working mode is the first cooling and heating water mode, the air conditioner indoor unit is determined as the target indoor unit participating in the power distribution of the outdoor unit.

[0115] In step S340, when the working mode is the second cooling and heating water mode, the air conditioner indoor unit is determined as the target indoor unit participating in the power distribution of the outdoor unit.

[0116] In step S350, when the working mode is the third cooling and heating water mode, the air conditioner indoor unit and the water tank indoor unit are determined as the target indoor units participating in the power distribution of the outdoor unit.

[0117] In step S360, when the working mode is the heating and heating water mode, the target indoor unit participating in the power distribution of the outdoor unit is determined from the air conditioner indoor unit and the water tank indoor unit according to the exhaust temperature and the high-pressure saturation temperature.

[0118] It can be understood that different working modes have corresponding target indoor units participating in the power distribution of the outdoor unit.

[0119] It can be understood that, since the water tank indoor unit needs to meet the working condition to participate in the power distribution of the outdoor unit, the exhaust temperature and the high-pressure saturation temperature are used to determine whether the water tank indoor unit meets the working condition in the embodiments of the present application.

[0120] It can be understood that, in the first cooling and heating water mode, the outdoor heat exchanger does not work or almost does not work, the first multi-way valve connects the air suction port of the air conditioner indoor unit and the compressor, the second multi-way valve connects the exhaust port of the compressor and the water tank indoor unit, the third multi-way valve connects the outdoor heat exchanger and the air suction port of the compressor, and the main expansion valve is in the full-closed state or the fixed opening degree.

[0121] Specifically, when the heat pump multi-contact system is in the first refrigeration and hot water heating mode and the main expansion valve is closed, the refrigerant is compressed by the compressor, enters the indoor water heater through the second multi-way valve for heat exchange and condensation, and then the water in the indoor water heater can be heated and treated. At this time, the sub-expansion valve is open, and the main expansion valve is closed, so all the condensed refrigerant enters the indoor air conditioner through the sub-expansion valve for evaporation treatment. Finally, the evaporated refrigerant reenters the compressor through the first multi-way valve to form a cycle. Because the main expansion valve is closed, the condensed refrigerant cannot enter the outdoor heat exchanger through the main expansion valve.

[0122] Alternatively, when the heat pump multi-contact system is in the first refrigeration and hot water heating mode and the main expansion valve is open with a fixed opening degree, the refrigerant is compressed by the compressor, enters the indoor water heater through the second multi-way valve for heat exchange and condensation, and then the water in the indoor water heater can be heated and treated. At this time, the main expansion valve and the sub-expansion valve are open, so the condensed refrigerant is divided into two parts. Most of the refrigerant enters the indoor air conditioner through the sub-expansion valve for evaporation treatment. Finally, the evaporated refrigerant reenters the compressor through the first multi-way valve to form a cycle. At the same time, a small part of the refrigerant enters the outdoor heat exchanger through the main expansion valve, so that the refrigerant in the outdoor heat exchanger can flow, avoiding the problem of refrigerant accumulation in the non-working outdoor heat exchanger under extremely low temperature conditions. Finally, the refrigerant passing through the outdoor heat exchanger reenters the compressor through the third multi-way valve to form a cycle.

[0123] It can be understood that in the second refrigeration and hot water heating mode, the outdoor heat exchanger acts as an evaporator, the first multi-way valve connects the indoor air conditioner and the suction port of the compressor, the second multi-way valve connects the exhaust port of the compressor and the indoor water heater, the third multi-way valve connects the outdoor heat exchanger and the suction port of the compressor, and the opening degree of the main expansion valve is adjusted according to the preset logic.

[0124] Specifically, when the heat pump multi-contact system is in the second refrigeration and hot water heating mode, the refrigerant is compressed by the compressor, enters the indoor water heater through the second multi-way valve for heat exchange and condensation, and then the water in the indoor water heater can be heated and treated. At this time, the main expansion valve and the sub-expansion valve are open, so the condensed refrigerant is divided into two parts. One part of the refrigerant enters the indoor air conditioner through the sub-expansion valve for evaporation treatment. Finally, the evaporated refrigerant reenters the compressor through the first multi-way valve to form a cycle. At the same time, the other part of the refrigerant enters the outdoor heat exchanger through the main expansion valve for evaporation treatment. Finally, the evaporated refrigerant reenters the compressor through the third multi-way valve to form a cycle.

[0125] It can be understood that, in the third refrigeration and hot water heating mode, the outdoor heat exchanger serves as a condenser, the first multi-way valve connects the suction port of the compressor and the air conditioner indoor unit, the second multi-way valve connects the exhaust port of the compressor and the domestic water tank indoor unit, and 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.

[0126] Specifically, when the heat pump multi-contact system is in the third refrigeration and hot water heating mode, the refrigerant is compressed by the compressor and then divided into two parts. One part of the refrigerant enters the outdoor heat exchanger through the third multi-way valve for heat exchange and condensation. At this time, the main expansion valve and the branch expansion valve are in an open state, so that the condensed refrigerant enters each air conditioner indoor unit through the main expansion valve and the branch expansion valve corresponding to the air conditioner indoor unit for evaporation treatment. The other part of the refrigerant enters the domestic water tank indoor unit through the second multi-way valve for heat exchange and condensation, so that the water in the domestic water tank indoor unit can be heated and stored energy, and at this time, the branch expansion valve is in an open state, so that the condensed refrigerant enters each air conditioner indoor unit through the branch expansion valve for evaporation treatment. Finally, all the refrigerants that have been evaporated in the air conditioner indoor units re-enter the compressor through the first multi-way valve, forming a cycle.

[0127] In addition, as shown in FIG. 4, FIG. 4 is a flowchart of the electric quantity detection method of the heat pump multi-contact system according to an embodiment of the present application. Regarding the determination of the target indoor unit participating in the power distribution of the outdoor unit according to the exhaust temperature and the high-pressure saturation temperature from the air conditioner indoor unit and the domestic water tank indoor unit in step S350, it can include but is not limited to step S410 and step S420.

[0128] In 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 the target indoor units participating in the power distribution of the outdoor unit, wherein the first preset value and the second preset value are 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.

[0129] In 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 air conditioner indoor unit is determined as the target indoor unit participating in the power distribution of the outdoor unit.

[0130] In an embodiment, the exhaust temperature and the high-pressure saturation temperature are used to determine whether the domestic water tank indoor unit meets the working condition. 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 domestic water tank indoor unit meets the working condition, so that the air conditioner indoor unit and the domestic water tank indoor unit are determined 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 condition, so that the air conditioner indoor unit is determined as the target indoor unit participating in the power distribution of the outdoor unit.

[0131] It can be understood that the first preset value and the second preset value are both determined by the minimum value of the water tank upper water temperature and the water tank lower water temperature.

[0132] In addition, as shown in FIG. 5, FIG. 5 is a flow chart of the electric quantity detection control method of the multi-connected air conditioner according to another embodiment of the present application; the process of obtaining the outdoor unit total power of the outdoor unit in step S230 can include but is not limited to step S510 and step S520.

[0133] Step S510, obtaining the compressor and motor total power of the outdoor unit, the outdoor unit valve power and the outdoor unit auxiliary electric heating power;

[0134] Step S520, superimposing the compressor and motor total power, the outdoor unit valve power and the outdoor unit auxiliary electric heating power to obtain the outdoor unit total power of the outdoor unit.

[0135] In an embodiment, since the outdoor unit has various valves in addition to the compressor and the fan motor and the like, and can be provided with an auxiliary electric heating belt, in order to comprehensively count the outdoor unit total power of the outdoor unit, the compressor and motor total power, the outdoor unit valve power and the outdoor unit auxiliary electric heating power need to be superimposed and calculated to obtain the final accurate outdoor unit total power of the outdoor unit.

[0136] For this purpose, the calculation formula of the outdoor unit total power of the outdoor unit is as follows: ODU P motor outdoor unit total power 4WV = P PTC compressor and motor total power ODU + P motor outdoor unit valve power 4WV + P PTC outdoor unit auxiliary electric heating power.

[0137] In addition, as shown in FIG. 6, FIG. 6 is a flow chart of the electric quantity detection control method of the multi-connected air conditioner according to another embodiment of the present application; the process of obtaining the compressor and motor total power in step S510 can include but is not limited to step S610 and step S620.

[0138] Step S610, detecting the supply voltage and the supply current through the outdoor unit main control board;

[0139] Step S620, calculating the compressor and motor total power according to the supply voltage and the supply current.

[0140] In an embodiment, for the calculation of the total power of the compressor and the motor, the total power of the compressor and the motor can be calculated by detecting the supply voltage and the supply current, and according to the following calculation formula: P motor = U*I, wherein U is the supply voltage, and I is the supply current.

[0141] In addition, as shown in FIG. 7, FIG. 7 is a flowchart of the power detection control method of the multi-connected air conditioner according to another embodiment of the present application; the process of obtaining the outdoor unit valve power in step S510 can include but is not limited to step S710 and step S720.

[0142] Step S710, determining the number of outdoor unit valves in the power-on working state;

[0143] Step S720, calculating the outdoor unit valve power according to the number of outdoor unit valves and the preset power-on power of a single valve.

[0144] In an embodiment, for the calculation of the outdoor unit valve power, the number of outdoor unit valves in the power-on working state can be counted, and the outdoor unit valve power can be calculated according to the preset power-on power of a single outdoor unit valve, and according to the following calculation formula: P 4WV = p*N, wherein p is the preset power-on power of a single outdoor unit valve, and N is the number of outdoor unit valves in the power-on working state.

[0145] In addition, as shown in FIG. 8, FIG. 8 is a flowchart of the power detection control method of the multi-connected air conditioner according to another embodiment of the present application; the process of obtaining the outdoor unit auxiliary electric heating power in step S510 can include but is not limited to step S810, step S820 and step S830.

[0146] Step S810, determining the working state of the compressor electric heating belt and the bottom plate electric heating belt;

[0147] Step S820, determining the compressor electric heating belt power and the bottom plate electric heating belt power according to the working state;

[0148] Step S830, superimposing the compressor electric heating belt power and the bottom plate electric heating belt power to obtain the outdoor unit auxiliary electric heating power.

[0149] The compressor electric heating belt is an electric heating element installed inside the compressor, mainly used to heat the inside of the compressor in low temperature environments to prevent condensate water from freezing or solidifying, ensuring the normal operation of the compressor. In winter or extremely cold environments, the electric heating belt plays an important role, as it usually starts automatically when the temperature drops to a certain level to ensure that the inside of the compressor maintains an appropriate operating temperature. The working principle of the compressor electric heating belt is mainly through the current flowing through the resistance wire to generate heat, which is transferred to the surrounding environment or objects to achieve the purpose of heating. It has the characteristics of high flexibility, high efficiency, energy saving, convenient control, and long service life. The compressor electric heating belt can be customized according to the required shape and size to adapt to different equipment and locations.

[0150] The chassis electric heating belt is an important component in air conditioning systems, mainly used to prevent the chassis of the air conditioner outdoor unit from icing in low temperature environments, affecting the normal operation and efficiency of the air conditioner. Specifically, the functions of the chassis electric heating belt include: in winter heating mode, preventing the chassis from icing after the condenser enters the defrosting mode to ensure the normal operation of the unit. Its working principle is that the chassis electric heating belt generates heat after being powered on to achieve the purpose of deicing.

[0151] In an embodiment, for the calculation of the outdoor unit auxiliary electric heating power, the compressor electric heating belt power and the chassis electric heating belt power need to be calculated simultaneously, and the sum of the two is the outdoor unit auxiliary electric heating power.

[0152] In addition, as shown in FIG. 9, FIG. 9 is a flowchart of the power detection control method of the multi-split air conditioner according to another embodiment of the present application; regarding the above step S810, it can include but is not limited to step S910 and step S920.

[0153] Step S910, obtaining the outdoor environment temperature;

[0154] Step S920, determining the working state of the compressor electric heating belt and the chassis electric heating belt according to the outdoor environment temperature.

[0155] In an embodiment, if the outdoor environment temperature is low, it may cause frosting or icing, etc., therefore, the embodiments of the present application need to determine the working state of the compressor electric heating belt and the chassis electric heating belt according to the outdoor environment temperature.

[0156] In addition, as shown in FIG. 10, FIG. 10 is a flowchart of the power detection control method of the multi-split air conditioner according to another embodiment of the present application; regarding the above step S920, it can include but is not limited to step S1010, step S1020 and step S1030.

[0157] Step S1010, determining that the outdoor unit is in standby state;

[0158] Step S1020, when the outdoor environment 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: starting the compressor electric heating belt and the bottom plate electric heating belt and continuously operating for a first preset time length, then stopping the compressor electric heating belt and the bottom plate electric heating belt and continuously stopping for a second preset time length;

[0159] Step S1030, when the outdoor environment temperature is less than the first preset temperature, keeping starting the compressor electric heating belt and the bottom plate electric heating belt.

[0160] In an embodiment, in the case that the outdoor unit is in a standby state, if the outdoor environment 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 environment temperature is slightly low, at this time, the probability of frosting or icing is not high, for this purpose, in order to prevent frosting or icing while hoping to avoid high power consumption, the embodiment of the application will start the compressor electric heating belt and the bottom plate electric heating belt intermittently, for example, first starting for a first preset time length, then stopping for a second preset time length, then starting for a first preset time length, then stopping for a second preset time length, and so on. If the outdoor environment temperature is less than the first preset temperature, at this time, the probability of frosting or icing is relatively high, for this purpose, in order to prevent frosting or icing, it is necessary to keep starting the compressor electric heating belt and the bottom plate electric heating belt.

[0161] It can be understood that, regarding the above-mentioned first preset temperature and second preset temperature, the value of the first preset temperature is less than the value of 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 application does not make specific limitation thereon.

[0162] In addition, as shown in FIG. 11, FIG. 11 is a flow chart of the power detection control method of the multi-connected air conditioner provided by another embodiment of the application; regarding the above-mentioned step S920, it can further include but is not limited to step S1110, step S1120 and step S1130.

[0163] Step S1110, determining that the outdoor unit is in a starting state;

[0164] Step S1120, when the outdoor environment temperature is less than or equal to the second preset temperature, keeping starting the compressor electric heating belt and the bottom plate electric heating belt;

[0165] Step S1130, when the outdoor environment temperature is greater than a third preset temperature, closing the compressor electric heating belt and the bottom plate electric heating belt, wherein the third preset temperature is greater than the second preset temperature.

[0166] In an embodiment, if the outdoor ambient temperature is less than or equal to the second preset temperature, i.e. 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 application needs to keep the compressor electric heating belt and the bottom plate electric heating belt started. If the outdoor ambient temperature is greater than the third preset temperature, i.e. the outdoor ambient temperature is relatively high, at this time it is difficult or impossible to frost or freeze, and for this, the embodiment of the application can turn off the compressor electric heating belt and the bottom plate electric heating belt.

[0167] It can be understood that, regarding the third preset temperature described above, the value thereof is greater than the second preset temperature, and the value of the third preset temperature can be preset, and the embodiment of the application does not make specific limitation thereto.

[0168] As shown in FIG. 12, FIG. 12 is a flow chart of the electric quantity detection control method of the multi-connected air conditioner according to another embodiment of the application; regarding the determination process of the sub-energy requirement of the indoor unit of the room, it can include but is not limited to step S1210 and step S1220.

[0169] Step S1210, obtaining the energy requirement reference value, the fan speed coefficient and the number of matches of the indoor unit of the room;

[0170] Step S1220, determining the sub-energy requirement of the indoor unit of the room according to the energy requirement reference value, the fan speed coefficient and the number of matches.

[0171] In an embodiment, the embodiment of the application can calculate the sub-energy requirement of each indoor unit of the room through the following formula: Q cn = K_ΔT * K_fan * HP, wherein Q cn is the sub-energy requirement of each indoor unit of the room, K_ΔT is the energy requirement reference value, K_fan is the fan speed coefficient of the indoor unit of the room, and HP is the number of matches.

[0172] As shown in FIG. 13, FIG. 13 is a flow chart of the electric quantity detection control method of the multi-connected air conditioner according to another embodiment of the application; regarding the obtaining process of the energy requirement reference value, it can include but is not limited to step S1310, step S1320 and step S1330.

[0173] Step S1310, obtaining the indoor ambient temperature;

[0174] Step S1320, determining the capacity requirement range of the indoor unit of the room according to the temperature difference between the indoor ambient temperature and the indoor set temperature;

[0175] Step S1330, determining the energy requirement reference value according to the capacity requirement range, wherein the energy requirement reference value and the temperature difference corresponding to the capacity requirement range are in a positive correlation.

[0176] In an embodiment, the embodiment of the present application calculates a temperature difference between the indoor environment temperature and the indoor set temperature, wherein one temperature difference corresponds to one capacity demand interval, and then determines the capacity demand reference value according to the capacity demand interval. If the temperature difference corresponding to the capacity demand interval is greater, the capacity demand reference value is greater; if the temperature difference corresponding to the capacity demand interval is smaller, the capacity demand reference value is smaller.

[0177] As shown in FIG. 14, FIG. 14 is a flowchart of the power detection control method of the multi-connected air conditioner according to another embodiment of the present application; the process of obtaining the wind speed coefficient can include but is not limited to step S1410 and step S1420.

[0178] Step S1410, obtaining the wind speed of the indoor unit fan of the indoor unit;

[0179] Step S1420, determining the wind speed coefficient according to the wind speed of the indoor unit fan, wherein the wind speed coefficient and the wind speed of the indoor unit fan are in a positive correlation.

[0180] In an embodiment, the embodiment of the present application obtains the wind speed of the indoor unit fan of the indoor unit, wherein different wind speeds correspond to different wind speed coefficients. If the wind speed of the indoor unit fan is greater, the wind speed coefficient is greater; if the wind speed of the indoor unit fan is smaller, the wind speed coefficient is smaller.

[0181] In addition, the number of matches is related to the nominal refrigerating capacity of the indoor unit. If the nominal refrigerating capacity is greater, the number of matches is greater; if the nominal refrigerating capacity is smaller, the number of matches is smaller.

[0182] As shown in FIG. 15, FIG. 15 is a flowchart of the power detection control method of the multi-connected air conditioner according to another embodiment of the present application; the process of determining the sub-capacity demand of the water tank indoor unit can include but is not limited to step S1510 and step S1520.

[0183] Step S1510, obtaining the water tank rated capacity and the water tank capacity demand coefficient of the water tank indoor unit;

[0184] Step S1520, determining the sub-capacity demand of the water tank indoor unit according to the water tank rated capacity and the water tank capacity demand coefficient.

[0185] In an embodiment, the embodiment of the present application obtains the water tank rated capacity and the water tank capacity demand coefficient of the water tank indoor unit, so as to obtain the sub-capacity demand of the water tank indoor unit according to the product of the water tank rated capacity and the water tank capacity demand coefficient.

[0186] As shown in FIG. 16, FIG. 16 is a flowchart of the power detection control method of the multi-connected air conditioner according to another embodiment of the present application; the process of determining the water tank capacity demand coefficient can include but is not limited to step S1610 and step S1620.

[0187] Step S1610, acquiring the water tank water temperature, the outdoor environment temperature and the water tank operation mode;

[0188] Step S1620, determining the water tank capacity demand coefficient according to the water tank water temperature, the outdoor environment temperature and the water tank operation mode.

[0189] Since different water tank water temperatures, outdoor environment temperatures and water tank operation modes have corresponding water tank capacity demand coefficients, the embodiments of the present application can determine the corresponding water tank capacity demand coefficients through the water tank water temperature, the outdoor environment temperature and the water tank operation mode.

[0190] Based on the power detection control method of the multi-connected air conditioner of each of the above embodiments, the overall embodiments of the power detection control method of the multi-connected air conditioner of the present application are proposed respectively.

[0191] First, in order to facilitate subsequent description, the following parameters are defined: T1 is the indoor environment temperature; Ts is the indoor set temperature; Tk is the water temperature of the domestic water tank indoor unit; T5U is the upper water temperature of the water tank; and T5L is the lower water temperature of the water tank.

[0192] 1. Power detection function operation logic overview:

[0193] The outdoor unit detects the total power of the outdoor unit, and distributes the power to the running terminal (indoor unit) according to the relevant rules. The corresponding terminal (indoor unit) performs relevant calculation and correction according to its own rules, and finally displays the power consumption.

[0194] 2. Control logic:

[0195] After the unit is powered on, the power detection starts to work.

[0196] Detection cycle, when the total power of the outdoor unit is greater than the preset threshold, for example, the total power of the outdoor unit P ODU > 0.15kW, then distribution is performed.

[0197] 2.1. Outdoor unit power calculation:

[0198] The total power of the outdoor unit P ODU is composed of the detection of the compressor, the motor, the valve and the auxiliary electric heating power, and the calculation method is as follows:

[0199] P ODU = P motor + P 4WV + P PTC , wherein 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 valve power of the outdoor unit, and P PTCThe auxiliary electric heating power of the outdoor unit.

[0200] 1) The total power P of the compressor and the motor of the outdoor unit motor The supply voltage and supply current are detected by the PFC circuit of the main control board of the outdoor unit, and then the power P is calculated according to the formula P = U*I, wherein the detection frequency can be 1 time / 2 seconds, and the range can be 1 time / 2-15 seconds. motor

[0201] 2) The valve power P of the outdoor unit 4WV = P*N, the number N of valves currently powered on is counted according to the mode of the outdoor unit, and then multiplied by the power P1 of a single valve to obtain the total valve power, for example, if the power of the four-way valve shown in FIG. 1 needs to be counted, the details are shown in Table 1 as follows:

[0202] Table 1

[0203] 3) The auxiliary electric heating power P of the outdoor unit PTC = P2+P3, the corresponding compressor electric heating band power P2 and chassis electric heating band power P3 are added according to the electric heating opening time of the outdoor unit, wherein different compressor electric heating band power P2 and chassis electric heating band power P3 correspond to different models.

[0204] The specific control of the electric heating of the outdoor unit is as follows:

[0205] The electric heating band of the outdoor unit must meet the following conditions from off to on:

[0206] (1) In the standby state:

[0207] A. If the outdoor environment temperature T4 sensed by the temperature sensing bag is a≤T4≤b; the value range of a can be 0-4℃, for example 0℃, the value range of b can be 3-6℃, for example 4℃, wherein the range a

[0208] From the start of the compressor shutdown state, after t1 minutes (the value range of t1 can be 30-120min, for example 60min), if the temperature range is met, the chassis electric heating band and the compressor electric heating band are started, and after starting, they must run for at least t2 (the value range of t2 can be 3-15min, for example 5min) [wherein during these t2 minutes, unless T4>c (the value range of c can be 6-12℃, for example 8℃), the electric heating will not be turned off], then stop for t1 minutes, then judge whether the temperature range is met, and if so, start the electric heating band. Repeat the above steps.

[0209] B. If T4

[0210] ​C. If T4 < a, becomes a ≤ T4 ≤ b, the electric heating band first forced to run t2, and then stop t1 minutes after, wherein, if the running time has exceeded t2 minutes, then immediately stop.

[0211] (2) In the state of starting:

[0212] If T4 ≤ b, the chassis electric heating band and compressor electric heating band are always on.

[0213] The electric heating band from on to off conditions:

[0214] A. If the outdoor environment temperature is higher than c, the value of c can be 6-12℃, for example 8℃, then the chassis electric heating band and compressor electric heating band are forced to be off.

[0215] 2.2, power distribution and sending

[0216] 1), distribution rules

[0217] According to the total output capacity of the outdoor unit Q c , and the capacity of each indoor unit Q cn , Q tank , the corresponding distribution of the outdoor unit power P CN of each indoor unit is as follows:

[0218] a) In the cooling and heating mode, the outdoor unit power is distributed to the air conditioner indoor unit with the need, and the water tank does not participate, P CN = P ODU * Q cn / Q c .

[0219] b) In the heating water mode, the outdoor unit power is distributed to the water tank, and the air conditioner indoor unit does not participate, P tank = P ODU .

[0220] c) In the cooling + heating water mode

[0221] i. Full heat recovery 1, full heat recovery 2, the outdoor unit power is distributed to the cooling indoor unit, and the water tank heating water does not participate in the outdoor unit power distribution, that is, the heating water capacity is not included in the total capacity and does not participate in the distribution, P CN = P ODU * Q cn / Q c .

[0222] ii. Partial heat recovery, the outdoor unit power is distributed to the cooling indoor unit, and a part is distributed to the heating water tank:

[0223] Indoor unit part: P CN = P ODU * Q cn / (∑Q cn -Qtank );

[0224] Water tank section: P tank =P ODU *Q tank / (∑Q cn -Q tank ).

[0225] d) Heating + Hot Water Mode: When the heat pump heats the water tank (i.e., the SV2 valve is energized), and the conditions for the water tank to operate as a heat pump are met, the outdoor unit's power is allocated to the water tank.

[0226] One of the following conditions:

[0227] (1) Exhaust temperature Tp > min[T5U, T5L] + k1, exhaust temperature is greater than the minimum of the two water temperatures, recommended value of k1 is 8, range of 5~12℃;

[0228] (2) The saturation temperature Tc corresponding to the high voltage sensor is min[T5U, T5L]+k2, k1 is recommended to be 1, and the range is 1~5℃.

[0229] If the hot water production conditions are not met, the outdoor unit power allocation is as follows:

[0230] P CN =P ODU *Q cn / Q c .

[0231] If the hot water production requirements are met, the outdoor unit power allocation is as follows:

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

[0233] Indoor unit: P CN =P ODU *Q tank / (∑Q cn +Q tank ).

[0234] 2) Indoor functional requirements need to be calculated

[0235] (1) Indoor unit of air conditioner

[0236] Cooling capacity requirements of each indoor unit Q cn =K_ΔT*K_fan*HP

[0237] Wherein, K_ΔT is the coefficient for the difference between indoor temperature and set temperature, which is the aforementioned energy requirement baseline value. Its value can be obtained from Figure 17 and Table 2 below:

[0238] Table 2

[0239] K_fan is the indoor unit wind speed coefficient, the value of which can be obtained through Table 3 below:

[0240] According to the following table query (the default is high wind when the fan is automatic):

[0241] Table 3

[0242] HP is as follows: the nominal refrigerating capacity 2000W corresponds to the indoor unit HP = 0.8; 2600W indoor unit corresponds to HP = 1.0; 3200 / 3500W indoor unit corresponds to HP = 1.2; 4800 / 5300W indoor unit corresponds to HP = 1.5; 7000W indoor unit corresponds to HP = 2.5.

[0243] (2) Indoor unit of domestic water tank (only heating water)

[0244] The capacity requirement Q of the outer disc water tank W = H W * the capacity requirement coefficient of the outer disc water tank;

[0245] (1) The capacity requirement coefficient of the outer disc water tank is related to the water temperature Tk, the outdoor environment temperature T4 and the water tank operation mode (ordinary, energy saving, fast). The water tank sends which mode to the outdoor unit.

[0246] (2) H W is the rated capacity of the outer disc water tank, H W is related to the capacity of the water tank, which is sent by the water tank to the outdoor unit

[0247] 1) Calculation of the capacity requirement coefficient of the outer disc water tank under each mode of the water tank operation:

[0248] The capacity requirement coefficient of the ordinary mode is A W ; the capacity requirement coefficient of the energy saving mode is A W_eco ; and the capacity requirement coefficient of the fast mode is A W_turbo .

[0249] (1) The value of the capacity requirement coefficient of the ordinary mode Aw is obtained through Table 4:

[0250] Table 4

[0251] (2) The capacity requirement coefficient of the energy saving mode A W_eco

[0252] Energy saving mode: A W_eco = A W * 0.8

[0253] (3) Quick mode capability requirement coefficient A W_turbo

[0254] Fast heating: A W_turbo According to the different values of Tk, A can be calculated by Figure 18. W_turbo The parameter value of the outdoor unit can be set to 45℃.

[0255] 2) Power transmission

[0256] The rated power of the outdoor unit, the total power of the system, and the power distribution of the outdoor unit are transmitted to the corresponding indoor unit by the outdoor unit, and are transmitted according to a preset transmission period, wherein the preset transmission period can be set arbitrarily, for example, 30 seconds.

[0257] The outdoor unit transmits the outdoor unit power to the indoor unit (including the water tank) through the indoor-outdoor communication protocol, and the indoor unit adds the calculated indoor unit power and the received outdoor unit power to obtain the total power consumption of the water tank, and performs power statistics.

[0258] Based on the power detection control method of the multi-connected air conditioner of each of the above embodiments, the embodiments 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-group pipe multi-connected machine, the demand of the indoor unit and the corresponding refrigeration rules, and cumulatively calculate the power consumption of the water tank to meet the customer demand and government subsidy requirements.

[0259] Based on the power detection method of the heat pump multi-connected system of each of the above embodiments, the following respectively proposes each embodiment of the controller, the heat pump multi-connected system, the computer readable storage medium and the computer program product of the present application.

[0260] As shown in Figure 19, Figure 19 is a schematic diagram of a controller for executing the power detection method of the heat pump multi-connected system according to an embodiment of the present application. The controller 700 implemented by 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 one processor 710 and one memory 720 are taken as an example in Figure 19.

[0261] The processor 710 and the memory 720 can be connected through a bus or other means, and a connection through a bus is taken as an example in Figure 19.

[0262] 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 can include a high-speed random access memory, and can also include a non-transitory memory, such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state memory device. In some embodiments, the memory 720 can optionally include a memory 720 that is remotely arranged relative to the processor 710, and these remote memories 720 can be connected to the controller 700 through 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.

[0263] Those skilled in the art can understand that the device structure shown in FIG. 19 does not constitute a limitation on the controller 700, and can include more or fewer components than those shown, or combine certain components, or different component arrangements.

[0264] In the controller 700 shown in FIG. 19, the processor 710 can be used to invoke the control program stored in the memory 720, thereby implementing the above-mentioned power detection method of the heat pump multi-contact system. Specifically, the non-transitory software programs and instructions required to implement the power detection method of the heat pump multi-contact system of the above-mentioned embodiments are stored in the memory 720, and when executed by the processor 710, the power detection method of the heat pump multi-contact system of the above-mentioned embodiments is executed.

[0265] It is worth noting that since the controller 700 of the embodiments of the present application can execute the power detection method of the heat pump multi-contact system of any of the above-mentioned embodiments, the specific implementation and technical effects of the controller 700 of the embodiments of the present application can be referred to the specific implementation and technical effects of the power detection method of the heat pump multi-contact system of any of the above-mentioned embodiments.

[0266] In addition, one embodiment of the present application also provides a heat pump multi-contact system, which includes the controller of the above-mentioned embodiments.

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

[0268] In addition, one embodiment of the present application also provides a computer readable storage medium, which stores computer executable instructions for executing the above-mentioned power detection method of the heat pump multi-contact system. Illustratively, the method steps in FIGS. 2 to 16 described above are executed.

[0269] It is worth noting that since the computer readable storage medium of the embodiments of the present application can perform the power detection method of the heat pump multi-contact system of any of the above embodiments, the specific implementation and technical effects of the computer readable storage medium of the embodiments of the present application can refer to the specific implementation and technical effects of the power detection method of the heat pump multi-contact system of any of the above embodiments.

[0270] In addition, one embodiment of the present application also 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 equipment 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 equipment executes the above-mentioned power detection method of the heat pump multi-contact system. Exemplarily, the method steps in FIGS. 2 to 16 described above are executed.

[0271] It is worth noting that since the computer program product of the embodiments of the present application can perform the power detection method of the heat pump multi-contact system of any of the above embodiments, the specific implementation and technical effects of the computer program product of the embodiments of the present application can refer to the specific implementation and technical effects of the power detection method of the heat pump multi-contact system of any of the above embodiments.

[0272] Those of ordinary skill in the art can understand that all or some steps of the method disclosed above can be implemented as software, firmware, hardware and their appropriate combinations. Some or all physical components can be implemented as software executed by a processor, such as a central processing unit, a digital signal processor or a microprocessor, or as hardware, or as an integrated circuit, such as an application specific integrated circuit. Such software can be distributed on a computer readable medium, which can include computer storage media (or non-transitory media) and communication media (or transitory media). As known to those of ordinary skill in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storage of information such as computer readable instructions, data structures, program modules or other data. Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technology, CD-ROM, digital versatile disks (DVD) or other optical disk storage, magnetic cassettes, magnetic tapes, magnetic disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and can be accessed by a computer. In addition, as known to those of ordinary skill in the art, communication media generally includes computer readable instructions, data structures, program modules or other data in modulated data signals such as carrier waves or other transmission mechanisms, and can include any information delivery medium.

[0273] It should be understood that, in the present application, "at least one" means one or more, and "multiple" means two or more. "And / or" is used to describe the relationship between associated objects, which means that there can be three relationships, for example, "A and / or B" can mean: only A, only B, and A and B exist at the same time, where A and B can be singular or plural. The character " / " generally represents an "or" relationship between the associated objects. "At least one of the following" or similar expressions means any combination of these items, including any combination of single or multiple 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, and c can be single or multiple.

[0274] In several embodiments provided in the present application, it should be understood that the disclosed systems, devices and methods can be implemented in other ways. For example, the device embodiments described above are only illustrative, for example, the division of units is only a logical functional division, and actual implementation can have another division manner, for example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. In addition, the coupling or direct coupling or communication connection between the displayed or discussed units can be indirect coupling or communication connection through some interfaces, devices or units, which can be electrical, mechanical or other forms. The units described as separate components can be or can not be physically separated, and the components displayed as units can be or can not be physical units, that is, they can be located in one place, or can be distributed on multiple network units. Some or all units can be selected according to actual needs to achieve the purpose of the embodiment.

[0275] It should also be understood that the various embodiments provided by the embodiments of the present application can be combined in any way to achieve different technical effects.

[0276] The above is a specific description of the preferred embodiments of the present application, but the present application is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the present application, and these equivalent modifications or replacements are all included in the scope defined by the claims of the present application.

Claims

1. A method of electric quantity detection for a heat pump multi-contact system, wherein, The heat pump multi-system includes an outdoor unit, an air conditioner indoor unit and a water tank indoor unit, the outdoor unit includes a compressor, an outdoor heat exchanger and a valve assembly, the valve assembly includes 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 water tank indoor unit, and the third multi-way valve is connected to the compressor and the outdoor heat exchanger; the method includes: obtaining the working mode of the heat pump multi-system, and determining the target indoor unit participating in the outdoor unit power distribution from the air conditioner indoor unit and the water tank indoor unit according to the working mode; determining the sub-energy demand of each target indoor unit, and determining the total energy demand of all target indoor units according to the sub-energy demand; obtaining the total power of the outdoor unit, and determining the outdoor unit distribution power of the target indoor unit according to the total power of the outdoor unit, the total energy demand and the sub-energy demand; and determining the power consumption of the target indoor unit according to the outdoor unit distribution power.

2. The method of claim 1, wherein, The target indoor unit participating in the outdoor unit power distribution is determined from the air conditioner indoor unit and the water tank indoor unit according to the working mode, including one of the following: when the working mode is a cooling mode or a heating mode, the air conditioner indoor unit is determined as the target indoor unit participating in the outdoor unit power distribution; when the working mode is a hot water mode, the water tank indoor unit is determined as the target indoor unit participating in the outdoor unit power distribution; when the working mode is a first cooling and hot water mode, the air conditioner indoor unit is determined as the target indoor unit participating in the outdoor unit power distribution; when the working mode is a second cooling and hot water mode, the air conditioner indoor unit is determined as the target indoor unit participating in the outdoor unit power distribution; when the working mode is a third cooling and hot water mode, the air conditioner indoor unit and the water tank indoor unit are determined as the target indoor units participating in the outdoor unit power distribution; when the working mode is a 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 water tank indoor unit according to the exhaust temperature and the high pressure saturation temperature.

3. The method of claim 2, wherein, The target indoor unit participating in the outdoor unit power distribution is determined from the air conditioner indoor unit and the water tank indoor unit according to the exhaust temperature and the high pressure saturation temperature, including 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 water tank indoor unit are determined as the target indoor units participating in the outdoor unit power distribution, wherein the first preset value and the second preset value are determined by the minimum value of the water tank upper water temperature and the water tank lower water temperature; 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 air conditioner indoor unit is determined as the target indoor unit participating in the outdoor unit power distribution.

4. The method according to any one of claims 1 to 3, wherein, The total power of the outdoor unit is obtained, including: obtaining the total power of the compressor and the motor of the outdoor unit, the outdoor valve power and the outdoor auxiliary electric heating power; and superimposing the total power, the outdoor valve power and the outdoor auxiliary electric heating power to obtain the total power of the outdoor unit.

5. The method of claim 4, wherein, The total power of the two is determined by the following steps: detecting the power supply voltage and the power supply current through the outdoor unit main control board; and calculating the total power of the compressor and the motor according to the power supply voltage and the power supply current.

6. The method of claim 4 or 5, wherein, The outdoor unit valve power is determined by the following steps: determining the number of outdoor unit valves in the power-on working state; and calculating the outdoor unit valve power according to the number of outdoor unit valves and the preset power-on power of a single valve.

7. The method according to any one of claims 4 to 6, wherein, The outdoor unit auxiliary electric heating power is determined by the following steps: determining the working state of the compressor electric heating band and the chassis electric heating band; determining the compressor electric heating band power and the chassis electric heating band power according to the working state; and superimposing the compressor electric heating band power and the chassis electric heating band power to obtain the outdoor unit auxiliary electric heating power.

8. The method of claim 7, wherein, The working state of the compressor electric heating band and the chassis electric heating band is determined by the following steps: obtaining the outdoor environment temperature; and determining the working state of the compressor electric heating band and the chassis electric heating band according to the outdoor environment temperature.

9. The method of claim 8, wherein, The working state of the compressor electric heating band and the chassis electric heating band is determined according to the outdoor environment temperature by the following steps: determining that the outdoor unit is in a standby state; when the outdoor environment temperature is greater than or equal to a first preset temperature and less than or equal to a second preset temperature, performing the following loop operation: starting the compressor electric heating band and the chassis electric heating band and continuously operating for a first preset time length, and then stopping the compressor electric heating band and the chassis electric heating band and continuously stopping for a second preset time length; and when the outdoor environment temperature is less than the first preset temperature, keeping the compressor electric heating band and the chassis electric heating band started.

10. The method of claim 8 or 9, wherein, The working state of the compressor electric heating band and the chassis electric heating band is determined according to the outdoor environment temperature by the following steps: determining that the outdoor unit is in a start-up state; when the outdoor environment temperature is less than or equal to a second preset temperature, keeping the compressor electric heating band and the chassis electric heating band started; and when the outdoor environment temperature is greater than a third preset temperature, closing the compressor electric heating band and the chassis electric heating band, wherein the third preset temperature is greater than the second preset temperature.

11. The method according to any one of claims 1 to 10, wherein, The sub-energy demand of the air conditioner indoor unit is determined by the following steps: obtaining the energy demand reference value, the wind speed coefficient and the number of matches of the air conditioner indoor unit; and determining the sub-energy demand of the air conditioner indoor unit according to the energy demand reference value, the wind speed coefficient and the number of matches.

12. The method of claim 11, wherein, The energy demand reference value is determined by the following steps: obtaining the indoor environment temperature; determining the capacity demand interval of the air conditioner indoor unit according to the temperature difference between the indoor environment temperature and the indoor set temperature; and determining the energy demand reference value according to the capacity demand interval, wherein the energy demand reference value and the temperature difference corresponding to the capacity demand interval have a positive correlation.

13. The method of claim 11 or 12, wherein, The wind speed coefficient is determined by the following steps: obtaining the indoor fan speed of the air conditioner indoor unit; and determining the wind speed coefficient according to the indoor fan speed, wherein the wind speed coefficient and the indoor fan speed have a positive correlation.

14. The method according to any one of claims 1 to 13, wherein, The sub-energy demand of the domestic water tank unit is determined by the following steps: obtaining a water tank rated capacity of the domestic water tank unit and a water tank capacity demand coefficient; and determining the sub-energy demand of the domestic water tank unit according to the water tank rated capacity and the water tank capacity demand coefficient.

15. The method of claim 14, wherein, The water tank capacity demand coefficient is determined by the following steps: obtaining a water tank water temperature, an outdoor environment temperature and a water tank operation mode; and determining the water tank capacity demand coefficient according to the water tank water temperature, the outdoor environment temperature and the water tank operation mode. 16.A controller comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor executes the computer program to perform the electric quantity detection method of the heat pump multi-contact system according to any one of claims 1 to 15. 17.A heat pump multi-contact system comprising the controller according to claim 16. 18.A computer readable storage medium storing computer executable instructions for performing the electric quantity detection method of the heat pump multi-contact system according to any one of claims 1 to 15.

19. A computer program product comprising computer programs or computer instructions, wherein, The computer program or the computer instructions are stored in a computer readable storage medium, and a processor of a computer device reads the computer program or the computer instructions from the computer readable storage medium, and the processor executes the computer program or the computer instructions, so that the computer device performs the electric quantity detection method of the heat pump multi-contact system according to any one of claims 1 to 15.

Images