Air conditioner motor cooling method and device and air conditioner

Abstract

The invention relates to an air conditioner motor cooling method and device, an air conditioner, computer equipment, a computer readable storage medium and a computer program product. The method comprises the steps that temperature parameters of a motor of the air conditioner are obtained, and a motor cooling loop is controlled to be adjusted to be in an initial cooling flow path state based on the temperature parameters; and cooling outlet water temperature parameters of the motor cooling loop and heat exchanger temperature parameters of the air conditioner are obtained, and the motor cooling loop is controlled to be adjusted to the target cooling flow path state according to the cooling outlet water temperature parameters and the heat exchanger temperature parameters. Wherein the motor is provided with a motor cooling loop, and the motor cooling loop is used for cooling the motor. The motor cooling loop is preliminarily adjusted according to the temperature parameters of the motor, feedback adjustment is conducted according to the cooling water outlet temperature parameters and the temperature parameters of the heat exchanger of the air conditioner, the motor cooling loop is controlled to accurately cool the motor, and the cooling efficiency of the motor is improved.

Description

Technical Field

[0001] The present application relates to the technical field of air conditioning, and in particular to a method and device for cooling an air conditioning motor, an air conditioner, a computer device, a computer-readable storage medium, and a computer program product. Background Art

[0002] In order to improve people's quality of life, air conditioning technology that can adjust the ambient temperature is also being updated day by day, bringing users a more comfortable environment experience. For example, a combined air handling unit is a type of air conditioning equipment, which is widely used in shopping malls, hotels, rail transit and other places. It circulates and processes air and can heat up, cool down, purify or blow air according to the needs of users to improve the comfort of users.

[0003] Air conditioners are usually driven by motors that rotate at high speed to drive airflow. When the air conditioner is turned on by the user, the motor also starts working. As the motor runs longer, a lot of heat will accumulate inside the motor, and the motor needs to be cooled. The traditional heat dissipation method is to use a specially set fan for air cooling. However, the heat dissipation effect is not good for motors that run for a long time, and it cannot be cooled down in a timely and effective manner. Summary of the invention

[0004] Based on this, it is necessary to provide an air conditioner motor cooling method, device, air conditioner, computer equipment, computer readable storage medium and computer program product that can effectively reduce the temperature in order to solve the above technical problems.

[0005] In a first aspect, the present application provides a method for cooling an air conditioner motor, the method comprising:

[0006] Acquire temperature parameters of a motor of the air conditioner; the motor is provided with a motor cooling circuit, and the motor cooling circuit is used to cool the motor;

[0007] Based on the temperature parameter, the motor cooling circuit is controlled to adjust to an initial cooling flow path state;

[0008] Obtaining a cooling water outlet temperature parameter of the motor cooling circuit and a heat exchanger temperature parameter of the air conditioner;

[0009] According to the cooling water outlet temperature parameter and the heat exchanger temperature parameter, the motor cooling circuit is controlled to adjust to a target temperature reduction flow path state.

[0010] In one embodiment, the temperature parameter includes a motor outer temperature parameter and a motor core temperature parameter, and the step of obtaining the temperature parameter of the motor of the air conditioner includes:

[0011] Obtaining the temperature parameter of the outer side of the motor;

[0012] The motor core temperature parameter is determined according to the circuit parameter of the motor and the motor outer temperature parameter.

[0013] In one embodiment, the state of the motor cooling circuit includes an opening state and a circuit state, and the controlling the motor cooling circuit to adjust to an initial cooling flow path state based on the temperature parameter includes:

[0014] The opening state of the motor cooling circuit is adjusted according to the temperature parameter and the preset temperature parameter, and the circuit state of the motor cooling circuit is controlled to be a basic circuit.

[0015] In one embodiment, the state of the motor cooling circuit includes an opening state and a circuit state, and controlling the motor cooling circuit to adjust to a target cooling flow path state according to the cooling water outlet temperature parameter and the heat exchanger temperature parameter includes:

[0016] If the cooling water outlet temperature parameter is greater than the heat exchanger temperature parameter, the opening state is adjusted to increase, and the circuit state is controlled to be a basic circuit or a compound circuit;

[0017] If the cooling water outlet temperature parameter is less than the heat exchanger temperature parameter, the opening state is controlled to remain unchanged, and the circuit state is controlled to be the composite circuit;

[0018] If the cooling water outlet temperature parameter is equal to the heat exchanger temperature parameter, the opening state and the circuit state are controlled to remain unchanged.

[0019] In one embodiment, before controlling the motor cooling circuit to adjust to the initial cooling flow path state based on the temperature parameter, the method further includes:

[0020] Acquire the operating mode of the air conditioner;

[0021] Based on the operation mode, the motor cooling circuit is controlled to adjust to a target flow direction state.

[0022] In one embodiment, the operation mode includes a cooling mode and a heating mode, the motor cooling circuit includes a flow direction control valve, and based on the operation mode, controlling the motor cooling circuit to adjust to a target flow direction state includes:

[0023] If the operation mode is the cooling mode, the flow control valve is controlled to be adjusted to a forward opening state;

[0024] If the operation mode is the heating mode, the flow direction control valve is controlled to be adjusted to a reverse opening state.

[0025] In one embodiment, the motor cooling circuit further includes an opening water pump and a circuit control valve. If the operation mode is a heating mode, after the flow control valve is controlled to be adjusted to a reverse opening state, the method further includes:

[0026] Obtaining a temperature difference parameter according to the temperature parameter;

[0027] Based on the comparison result between the preset temperature difference threshold and the temperature difference parameter, the flow direction control valve, the opening water pump and the loop control valve are adjusted.

[0028] In one embodiment, the adjusting the flow control valve, the opening water pump and the loop control valve based on the comparison result between the preset temperature difference threshold and the temperature difference parameter includes:

[0029] If the preset temperature difference threshold is greater than or equal to the temperature difference parameter, the flow direction control valve is controlled to remain in a reverse open state, the opening of the water pump is controlled to increase, and the loop control valve is controlled to be turned on;

[0030] If the preset temperature difference threshold is less than the temperature difference parameter, the flow direction control valve is controlled to be closed.

[0031] In a second aspect, the present application also provides an air-conditioning motor cooling device, the device comprising:

[0032] An initial detection module, used to obtain temperature parameters of a motor of the air conditioner; the motor is provided with a motor cooling circuit, and the motor cooling circuit is used to cool the motor;

[0033] A fine-tuning module, used for controlling the motor cooling circuit to adjust to an initial cooling flow path state based on the temperature parameter;

[0034] A feedback detection module, used to obtain the cooling water outlet temperature parameter of the motor cooling circuit and the heat exchanger temperature parameter of the air conditioner;

[0035] The feedback regulation module is used to control the motor cooling circuit to adjust to a target cooling flow path state according to the cooling water outlet temperature parameter and the heat exchanger temperature parameter.

[0036] In a third aspect, the present application further provides an air conditioner, the air conditioner comprising an air conditioner body, a motor, a motor cooling circuit and a controller, the air conditioner body comprising a heat exchanger and a heat transfer circuit, the heat transfer circuit being arranged at the heat exchanger for transferring heat, the motor being connected to the air conditioner body, the motor cooling circuit being arranged at the motor and being in communication with the heat transfer circuit;

[0037] The controller is connected to the heat transfer circuit, the motor and the motor cooling circuit, and is used to implement the air-conditioning motor cooling method described in the above embodiments.

[0038] In one embodiment, the air conditioner further includes a temperature detection device, and the number of the temperature detection devices is multiple and respectively arranged in the heat transfer circuit, the motor and the motor cooling circuit, and the controller connects each of the temperature detection devices and the motor cooling circuit.

[0039] In one embodiment, the motor is a magnetic levitation motor.

[0040] In one of the embodiments, the motor cooling circuit comprises an opening water pump, which is arranged in a pipeline of the motor cooling circuit and is used to adjust the flow rate of the motor cooling circuit.

[0041] In one embodiment, the motor cooling circuit includes a flow control valve, which is arranged at a common end point where the pipelines of the heat transfer circuit and the motor cooling circuit are connected, and is used to control the connection direction of the motor cooling circuit and the heat transfer circuit.

[0042] In one embodiment, the motor cooling circuit includes more than two cooling branches, and each of the cooling branches is connected to the heat transfer circuit.

[0043] In one embodiment, the motor cooling circuit further includes more than two circuit control valves, the number of the circuit control valves matches the number of the cooling branches, and each circuit control valve is respectively arranged in a different cooling branch and is connected to the controller.

[0044] In a fourth aspect, the present application further provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0045] Acquire temperature parameters of a motor of the air conditioner; the motor is provided with a motor cooling circuit, and the motor cooling circuit is used to cool the motor;

[0046] Based on the temperature parameter, the motor cooling circuit is controlled to adjust to an initial cooling flow path state;

[0047] Obtaining a cooling water outlet temperature parameter of the motor cooling circuit and a heat exchanger temperature parameter of the air conditioner;

[0048] According to the cooling water outlet temperature parameter and the heat exchanger temperature parameter, the motor cooling circuit is controlled to adjust to a target temperature reduction flow path state.

[0049] In a fifth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the following steps are implemented:

[0050] Acquire temperature parameters of a motor of the air conditioner; the motor is provided with a motor cooling circuit, and the motor cooling circuit is used to cool the motor;

[0051] Based on the temperature parameter, the motor cooling circuit is controlled to adjust to an initial cooling flow path state;

[0052] Obtaining a cooling water outlet temperature parameter of the motor cooling circuit and a heat exchanger temperature parameter of the air conditioner;

[0053] According to the cooling water outlet temperature parameter and the heat exchanger temperature parameter, the motor cooling circuit is controlled to adjust to a target temperature reduction flow path state.

[0054] In a sixth aspect, the present application further provides a computer program product, including a computer program, which implements the following steps when executed by a processor:

[0055] Acquire temperature parameters of a motor of the air conditioner; the motor is provided with a motor cooling circuit, and the motor cooling circuit is used to cool the motor;

[0056] Based on the temperature parameter, the motor cooling circuit is controlled to adjust to an initial cooling flow path state;

[0057] Obtaining a cooling water outlet temperature parameter of the motor cooling circuit and a heat exchanger temperature parameter of the air conditioner;

[0058] According to the cooling water outlet temperature parameter and the heat exchanger temperature parameter, the motor cooling circuit is controlled to adjust to a target temperature reduction flow path state.

[0059] The above-mentioned air conditioner motor cooling method, device, air conditioner, computer equipment, computer-readable storage medium and computer program product include obtaining the temperature parameters of the air conditioner motor, controlling the motor cooling circuit to adjust to the initial cooling flow path state based on the temperature parameters, obtaining the cooling water outlet temperature parameters of the motor cooling circuit and the air conditioner heat exchanger temperature parameters, and controlling the motor cooling circuit to adjust to the target cooling flow path state according to the cooling water outlet temperature parameters and the heat exchanger temperature parameters. Among them, the motor is provided with a motor cooling circuit, and the motor cooling circuit is used to cool the motor. By preliminarily adjusting the motor cooling circuit according to the temperature parameters of the motor, and then performing feedback adjustment according to the cooling water outlet temperature parameters and the air conditioner heat exchanger temperature parameters, the motor cooling circuit is controlled to accurately cool the motor, thereby improving the cooling efficiency of the motor. BRIEF DESCRIPTION OF THE DRAWINGS

[0060] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0061] Figure 1 is a structural block diagram of an air conditioner in one embodiment;

[0062] Figure 2 A schematic diagram of a flow chart of a method for cooling an air-conditioning motor in one embodiment;

[0063] Figure 3 A schematic flow chart of the steps of obtaining the temperature parameters of the motor of the air conditioner in one embodiment;

[0064] Figure 4 A schematic flow chart of a method for cooling an air-conditioning motor in another embodiment;

[0065] Figure 5 A schematic flow chart of a method for cooling an air conditioner motor in another embodiment;

[0066] Figure 6 A schematic diagram of a flow chart of a method for cooling an air-conditioning motor in yet another embodiment;

[0067] Figure 7 A flow chart of a method for cooling an air-conditioning motor in one embodiment;

[0068] Figure 8 A flow chart of a method for cooling an air conditioner motor in another embodiment;

[0069] Fig. 9 is a partial schematic diagram of an air conditioner in one embodiment;

[0070] Fig.10 is an application schematic diagram of a motor cooling circuit in one embodiment;

[0071] Fig.11 A schematic diagram of the structure of a combined air handling unit in one embodiment;

[0072] Fig.12 is a structural block diagram of an air-conditioning motor cooling device in one embodiment;

[0073] Fig.13 FIG. 4 is a diagram showing the internal structure of a computer device in one embodiment. DETAILED DESCRIPTION

[0074] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0075] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0076] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0077] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0078] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0079] Combined air handling unit is an air conditioning device commonly used in shopping malls, hotels, rail transit, etc. that need to generate a large air supply volume for a long time, referred to as air conditioning. Usually, the combined air handling unit is installed on the lowest floor of the building in the form of a sealed combined box. The fan section inside the combined box processes the return air to the surface cooling section to achieve air conditioning.

[0080] However, due to the limited space in the box and the unidirectional air flow, it is difficult to effectively cool down the motor of the combined air handling unit through air cooling. Correspondingly, the motor accumulates heat due to continuous operation, which will affect the operation of the motor due to long-term high-temperature operation. In severe cases, it may cause the combined air handling unit to stop operating.

[0081] Therefore, the air conditioner motor cooling method of the embodiment of the present application can be applied to various air conditioners that need to dissipate heat from the motor. Figure 1 As shown, the air conditioner includes an air conditioner body, a motor, a motor cooling circuit and a controller. The air conditioner body includes a heat exchanger and a heat transfer circuit. The heat transfer circuit is arranged on the heat exchanger for transferring heat. The motor is connected to the air conditioner body. The motor cooling circuit is arranged on the motor and is connected to the heat transfer circuit.

[0082] The air conditioner body includes most of the components used to complete the functions of air conditioning, such as cooling and heating, and the motor is used to drive some components in the air conditioner body as the basis for the realization of the air conditioning function. The motor can drive the start of the air conditioner body, generate driving force and transmit it to the corresponding components in the air conditioner body to complete the air conditioning in coordination. Since the motor temperature rises due to the accumulation of heat during the use of the motor, a motor cooling circuit is also set on the motor to cool the motor. The controller can control the start and stop and working state of the air conditioner body, the motor and the motor cooling circuit according to the user's instructions or according to the preset program content. In the air conditioner body, the heat transfer circuit is a circuit that completes the air temperature regulation of the air conditioner. Chilled water flows in it, which can participate in the coordinated work of components such as the compressor, condenser and evaporator in the air conditioner body. The chilled water circulates in the heat transfer circuit to drive heat transfer and complete the air conditioning function of the air conditioner. The heat exchanger is a device that realizes heat transfer. It has good thermal conductivity and can release the heat carried by the chilled water as a heat source for other components in the air conditioner body, so that the air conditioner body can complete the air temperature regulation.

[0083] Correspondingly, the motor cooling circuit is a circuit pipeline for cooling the motor. In this embodiment, the pipeline of the motor cooling circuit is connected to the pipeline of the heat transfer circuit. When the chilled water in the heat transfer circuit flows in the pipeline, it can flow from the heat transfer circuit into the motor cooling circuit to cool the motor. Chilled water is a liquid that can easily take away and transfer heat. It can flow in the heat transfer circuit and the motor cooling circuit. When flowing through the motor cooling circuit, it takes away the heat emitted by the motor and cools the motor.

[0084] The motor cooling circuit is connected to the heat transfer circuit. At the connection point between the two, the motor cooling circuit needs to be provided with two pipes as flow channels for chilled water, so that the chilled water can enter the motor cooling circuit from the heat transfer circuit, and the chilled water can return from the motor cooling circuit to the heat transfer circuit. Therefore, the two pipes in the motor cooling circuit that are directly connected to the heat transfer circuit are respectively called the motor water inlet pipe and the motor water return pipe. Furthermore, there are different pipelines in the heat transfer circuit. In order to facilitate the flow of chilled water in the motor cooling circuit, a water inlet manifold and a water return manifold are provided in the heat transfer circuit. The chilled water first flows through the water inlet manifold in the heat transfer circuit, and then flows through the motor water inlet pipe of the motor cooling circuit, and flows out of the motor water return pipe of the motor cooling circuit to the water return manifold of the heat transfer circuit.

[0085] Specifically, the controller connects the heat transfer circuit, the motor and the motor cooling circuit. The heat exchanger and the heat transfer circuit can be used as a part of the air conditioner body to realize air conditioning. The controller controls the motor to drive the air conditioner body to drive the air conditioner body to complete air conditioning. At the same time, the controller can also obtain the working status of the heat transfer circuit and the motor cooling circuit, and control and adjust the motor cooling circuit according to the air conditioner motor cooling method recorded in the following embodiments to ensure the heat dissipation efficiency of the motor cooling circuit to the motor, thereby improving the heat dissipation while also ensuring the reliability of the air conditioner.

[0086] For example, the motor of a combined air handling unit type air conditioner usually adopts a pulley motor transmission system, which is mainly used in the fan part of the unit to drive the dual-inlet centrifugal fan to operate at a high speed under high static pressure, thereby realizing the circulation and processing of large air volume. However, due to the friction between the belt and the wheel, the pulley transmission has a lower transmission efficiency than the direct bearing connection or gear transmission, which will lead to additional energy loss. At the same time, as a wearing part, the belt needs to be inspected and replaced regularly, especially if the working environment conditions of the air conditioner are poor, such as high temperature, high humidity or the presence of corrosive gases, the service life of the belt will be significantly shortened, increasing the maintenance frequency and cost. Therefore, in one of the embodiments, the motor is a magnetic suspension motor. The magnetic suspension motor adopts a magnetic suspension bearing, and there is no mechanical contact between the stator and the mover, which greatly reduces the operating noise, and has the characteristics of energy saving and high efficiency, high system durability, etc. And the core of the magnetic suspension motor is to control the current temperature of the electromagnetic coil to ensure the suspension of the rotor, so the magnetic suspension motor has a higher and more stringent demand for cooling. The air conditioning motor cooling method provided in the present application can effectively maintain the cooling efficiency of the magnetic levitation motor, complement the setting of the magnetic levitation motor, complete air conditioning more efficiently, and improve the efficiency of the air conditioner.

[0087] In an exemplary embodiment, Figure 2 As shown, a method for cooling an air conditioner motor is provided. Figure 1The controller in is taken as an example to illustrate, including the following steps 202 to 208.

[0088] Step 202, obtaining temperature parameters of the motor of the air conditioner.

[0089] The motor is provided with a motor cooling circuit, which is used to cool the motor. Specifically, the motor cooling circuit can be provided on the surface of the motor or inside the motor housing, and is provided closer to the stator, rotor, coil and other components in the motor that are prone to heat.

[0090] The temperature parameter of the motor can be directly obtained by the controller or obtained by the controller through a temperature detection device. In one embodiment, the air conditioner further includes a temperature detection device, and the number of the temperature detection devices is multiple, which are respectively arranged in the heat transfer circuit, the motor and the motor cooling circuit, and the controller connects each temperature detection device and the motor cooling circuit.

[0091] The temperature detection device refers to a device capable of detecting temperature, including but not limited to temperature sensors, temperature sensing packages, thermometers, and other types of temperature sensing elements. In this embodiment, the specific location of the temperature detection device is not limited, and can be adjusted accordingly according to the different structural settings of the heat transfer circuit, the motor, and the motor cooling circuit to ensure that the temperature detected by the temperature detection device is accurate.

[0092] The temperature detected by the temperature detection device is transmitted to the controller, so that the controller can obtain the temperature parameters of the motor. Optionally, the temperature detection device can also be set at other locations, and the controller can also obtain other temperatures at other locations of the air conditioner.

[0093] In an exemplary embodiment, the temperature parameters include motor outer temperature parameters and motor core temperature parameters, such as Figure 3 As shown, step 202 includes steps 302 to 304 .

[0094] Step 302, obtaining the temperature parameter of the motor outer side.

[0095] The temperature detection device may be arranged outside the motor, and can detect and obtain the temperature parameters outside the motor. The controller is connected to the temperature detection device to obtain the temperature parameters outside the motor. Exemplarily, the temperature detection device may be a temperature sensing package.

[0096] Step 304 , determining the motor core temperature parameter according to the motor circuit parameter and the motor outer temperature parameter.

[0097] Among them, the circuit parameters of the motor include but are not limited to the resistance values ​​of various parts of the motor and the material parameter values ​​of the motor. Since the internal temperature of the motor, especially the magnetic levitation motor, is dissipated from the cylindrical surface of the stator based on the core loss and copper loss, there is a certain gap between the outside temperature of the motor and the core temperature of the motor. However, setting the temperature detection equipment directly at the core of the motor is likely to affect the operation of the motor. Therefore, it is also necessary to convert the outside temperature parameters of the motor according to the circuit parameters of the motor to determine the core temperature parameters of the motor.

[0098] The calculation formula is:

[0099] T1=R2(K+T3) / R1-K

[0100] Among them, T1 is the core temperature parameter of the motor, usually the instantaneous temperature of the winding when it is running; R2 is the resistance of the motor when it is running; K is one of the material parameter values ​​of the motor, specifically the material parameter of the motor winding. When the motor winding is copper, the value is 351, and when the motor winding is aluminum, the value is 337; T3 is the temperature parameter of the outside of the motor, usually the motor casing temperature, or the external ambient temperature; R1 is the resistance of the motor when it is not running, usually the basic resistance.

[0101] By calculating with the above formula, the motor outer temperature parameter is combined with the motor circuit parameter to determine the motor core temperature parameter at this time, which is used as one of the temperature parameters to be used in subsequent steps.

[0102] Step 204 , based on the temperature parameter, the motor cooling circuit is controlled to adjust to an initial cooling flow path state.

[0103] After obtaining the temperature parameters, the controller makes initial adjustments to the motor cooling circuit according to the size of the temperature parameters, and controls the motor cooling circuit to adjust to the initial cooling flow path state. The initial cooling flow path state can initially cool the motor under the current temperature parameters to ensure that the temperature of the motor will not be too high to cause safety hazards.

[0104] Step 206, obtaining the cooling water outlet temperature parameter of the motor cooling circuit and the heat exchanger temperature parameter of the air conditioner.

[0105] Among them, the cooling water outlet temperature parameter and the heat exchanger temperature parameter can be directly obtained by the controller, or obtained by the controller through a temperature detection device. In one embodiment, there are multiple temperature detection devices, which are not only arranged on the motor, but also arranged on the heat transfer circuit and the motor cooling circuit. The temperature detection device can be arranged on one side of the heat transfer circuit close to the heat exchanger, or can be arranged at a position in the motor cooling circuit that is connected to the heat transfer circuit.

[0106] Exemplarily, it can be set in the motor return pipe of the motor cooling circuit and the return water header of the heat transfer circuit. Among them, the temperature detection device is set on the side of the motor cooling circuit close to the motor return water pipe to detect the cooling water outlet temperature parameter of the motor cooling circuit. The temperature detection device is also set on the return water header of the heat transfer circuit to detect the heat exchanger temperature parameter, which is equivalent to the unit heat exchanger return water temperature of the air conditioner. Specifically, the controller is connected to the temperature detection device to obtain the cooling water outlet temperature parameter and the heat exchanger temperature parameter.

[0107] Step 208, controlling the motor cooling circuit to adjust to a target cooling flow path state according to the cooling water outlet temperature parameter and the heat exchanger temperature parameter.

[0108] Specifically, after obtaining the cooling water outlet temperature parameter and the heat exchanger temperature parameter, the controller controls the motor cooling circuit to adjust to the target cooling flow path state according to the comparison result between the cooling water outlet temperature and the heat exchanger temperature parameter.

[0109] It should be noted that the initial cooling flow path state and the target cooling flow path state are both state limitations of the motor cooling circuit, such as the flow rate value, flow value of the chilled water in the motor cooling circuit and the flow path morphology of the motor cooling circuit, etc., which are not limited here and will be given as examples in subsequent embodiments.

[0110] The above-mentioned air conditioner motor cooling method includes obtaining the temperature parameters of the air conditioner motor, controlling the motor cooling circuit to adjust to the initial cooling flow path state based on the temperature parameters, obtaining the cooling water outlet temperature parameters of the motor cooling circuit and the air conditioner heat exchanger temperature parameters, and controlling the motor cooling circuit to adjust to the target cooling flow path state according to the cooling water outlet temperature parameters and the heat exchanger temperature parameters. Among them, the motor is provided with a motor cooling circuit, and the motor cooling circuit is used to cool the motor. By preliminarily adjusting the motor cooling circuit according to the temperature parameters of the motor, and then performing feedback adjustment according to the cooling water outlet temperature parameters and the air conditioner heat exchanger temperature parameters, the motor cooling circuit is controlled to accurately cool the motor, thereby improving the cooling efficiency of the motor.

[0111] In an exemplary embodiment, the state of the motor cooling circuit includes an opening state and a circuit state.

[0112] The pipeline composition of the motor cooling circuit can be set according to demand, that is, the motor cooling circuit can include a pipe of uniform thickness, or a pipe network distributed in a capillary network. In this embodiment, the motor cooling circuit includes an opening water pump connected to the controller, and the opening water pump is arranged in the pipeline of the motor cooling circuit to adjust the flow rate of the chilled water in the motor cooling circuit. The opening water pump is a water pump capable of adjusting the opening, which can be adjusted to a specified opening state under the control of the controller, and drives the chilled water flowing into the motor cooling circuit in the heat transfer circuit, and pumps the chilled water from the heat transfer circuit into the motor cooling circuit. The opening water pump has different pump force levels, corresponding to the opening. When the opening of the opening water pump increases, the higher the pump force level of the chilled water, the faster the flow rate of the chilled water in the motor cooling circuit, and the larger the flow rate. Conversely, when the opening of the opening water pump decreases, the lower the pump force level of the chilled water, the lower the flow rate of the chilled water in the motor cooling circuit.

[0113] In this embodiment, the motor cooling circuit includes more than two cooling branches, and each cooling branch is connected to the heat transfer circuit. One end of each cooling branch is collected at the motor water inlet pipe, which is connected to the water inlet manifold of the heat transfer circuit through the motor water inlet pipe, and the other end of each cooling branch is collected at the motor water return pipe, which is connected to the water return manifold of the heat transfer circuit through the motor water return pipe. Specifically, each cooling branch is evenly laid on the surface of the motor, and chilled water flows inside each cooling branch to fully exchange heat with the motor, thereby cooling the motor.

[0114] Each cooling branch in the motor cooling circuit can cool the motor respectively, and the controller can control the working state of the cooling branch according to demand. In one embodiment, the motor cooling circuit also includes more than two circuit control valves, each circuit control valve is connected to the controller, the number of circuit control valves matches the number of cooling branches, and each circuit control valve is respectively arranged in a different cooling branch.

[0115] Specifically, at least one circuit control valve is provided in each cooling branch, and the circuit control valve can control the flow of chilled water in the cooling branch. When the circuit control valve is opened, the chilled water in the cooling branch can flow freely; when the circuit control valve is closed, the chilled water in the cooling branch cannot flow, which is equivalent to closing the cooling branch. Each circuit control valve is connected to a controller, and the controller can control the opening and closing of each circuit control valve, and then control the working state of each cooling branch to control the circuit state of the motor cooling circuit.

[0116] like Figure 4 As shown, step 204 includes step 402: adjusting the opening state of the motor cooling circuit according to the temperature parameter and the preset temperature parameter, and controlling the circuit state of the motor cooling circuit to be the basic circuit.

[0117] Among them, the preset temperature parameter is a pre-set temperature value stored in the controller, and the size of the value can be set according to the needs. The number of the values ​​can be one or more. When the preset temperature parameter includes multiple values, it can be determined that the temperature parameter is in a certain interval of the temperature interval formed by the preset temperature parameter, and the opening state of the motor cooling circuit is adjusted according to the interval. When the preset temperature parameter is a value, the controller can compare the temperature parameter with the preset temperature parameter, and adjust the opening state of the motor cooling circuit according to the size result obtained by the comparison.

[0118] The opening state of the motor cooling circuit is determined by the opening of the opening water pump, and the controller will adjust the opening of the opening water pump according to the temperature parameter and the preset temperature parameter. Specifically, when the preset temperature parameter is the set target temperature T, the motor core temperature parameter in the temperature parameter is compared with the set target temperature T to determine the initial temperature rise. When the motor core temperature parameter is less than or equal to the set target temperature T, the controller determines that the initial temperature rise is low and adjusts the opening of the opening water pump to a low opening; when the motor core temperature parameter is greater than the set target temperature T, the controller determines that the initial temperature is high and the temperature of the motor rises faster, and adjusts the opening of the opening water pump to a high opening.

[0119] Wherein, if the motor cooling circuit includes multiple cooling branches, the circuit state of the motor cooling circuit is determined by the opening and closing of the circuit control valves of each cooling branch. The basic circuit refers to the common state of the motor cooling circuit. When the motor cooling circuit includes multiple cooling branches, the circuit state when any cooling branch is enabled is the basic circuit. Specifically, when the controller controls the circuit state of the motor cooling circuit, it can be based on adjusting the opening state as a trigger point. When adjusting the opening state of the motor cooling circuit, the circuit state of the motor cooling circuit is also adjusted to the basic circuit.

[0120] Optionally, when the controller controls the loop state of the motor cooling loop, it can also adjust the loop state of the motor cooling loop based on the comparison result of the temperature parameter and the preset temperature parameter. As described above, exemplarily, when the preset temperature parameter is the set target temperature T, and the number of cooling branches and loop control valves are both two, the motor core temperature parameter in the temperature parameter is compared with the set target temperature T to determine the initial temperature rise. When the motor core temperature parameter is less than or equal to the set target temperature T, the controller determines that the initial temperature rise is low, and adjusts the loop state of the motor cooling loop to the basic loop, that is, controls one loop control valve to open and the other loop control valve to close; when the motor core temperature parameter is greater than the set target temperature T, the controller determines that the initial temperature is high and the temperature of the motor rises faster, and adjusts the loop state of the motor cooling loop to a composite loop, which is a loop state obtained by superimposing more than two basic loops, that is, controls both loop control valves to open.

[0121] In this embodiment, the motor cooling circuit is initially adjusted according to the temperature parameters of the motor, and the opening state and circuit state are controlled at the same time to ensure the cooling efficiency of the motor, which is conducive to stabilizing the temperature of the motor and making the air conditioner run smoothly and reliably.

[0122] In an exemplary embodiment, the state of the motor cooling circuit includes an opening state and a circuit state. The opening state and the circuit state have been described above and will not be repeated here. Figure 5 As shown, step 208 includes steps 502 to 506 .

[0123] Step 502: If the cooling water outlet temperature parameter is greater than the heat exchanger temperature parameter, the opening state is adjusted to increase, and the loop state is controlled to be a basic loop or a compound loop.

[0124] The controller compares the cooling water outlet temperature parameter and the heat exchanger temperature parameter to obtain a comparison result. If the cooling water outlet temperature parameter is greater than the heat exchanger temperature parameter, it indicates that the temperature of the motor cooling circuit is higher than the temperature of the heat transfer circuit, indicating that the temperature of the motor is relatively high and the cooling efficiency of the motor needs to be increased. Specifically, the controller adjusts the opening state of the motor cooling circuit to increase, that is, controls the opening of the opening water pump to increase, so that more chilled water flows into the motor cooling circuit to cool the motor, that is, increases the flow rate of chilled water in the motor cooling circuit.

[0125] The controller can control the circuit state of the motor cooling circuit to remain as the basic circuit, that is, control a single circuit control valve to open, and other circuit control valves to close, so that a single cooling branch is conducted. In this way, the opening of the water pump is increased on the basis of the unchanged flow path, and the flow rate of the chilled water in the motor cooling circuit can be stably increased.

[0126] Furthermore, the controller can also choose to adjust the circuit state of the motor cooling circuit. The controller can control the circuit state of the motor cooling circuit to be a composite circuit. The composite circuit is the circuit state obtained by superimposing two or more basic circuits, that is, controlling multiple circuit control valves to be open and other circuit control valves to be closed, so that multiple cooling branches are turned on. In this way, while increasing the opening of the opening water pump, the flow path of the chilled water can be increased to improve the heat dissipation efficiency. It should be noted that when the control is a composite circuit, the number of cooling branches added is determined according to the opening of the opening water pump. When the opening of the opening water pump increases less, the number of cooling branches added is also less; when the opening of the opening water pump increases more, the number of cooling branches added can increase. In short, it is necessary to ensure that the flow of chilled water in the motor cooling circuit is increased to increase the heat dissipation efficiency.

[0127] Step 504: If the cooling water outlet temperature parameter is less than the heat exchanger temperature parameter, the opening state is controlled to remain unchanged, and the loop state is controlled to be a compound loop.

[0128] The controller compares the cooling water outlet temperature parameter and the heat exchanger temperature parameter to obtain a comparison result. If the cooling water outlet temperature parameter is less than the heat exchanger temperature parameter, it indicates that the temperature of the motor cooling circuit is lower than the temperature of the heat transfer circuit, indicating that the temperature of the motor is relatively low, and there is no need to increase the cooling efficiency of the motor, and the cooling efficiency can be relatively lowered. Specifically, the controller adjusts the opening state of the motor cooling circuit to remain unchanged, and controls the circuit state to switch from a basic circuit to a composite circuit, that is, controls multiple circuit control valves to open, and other circuit control valves to close, so that multiple cooling branches are turned on. In this way, the flow path of the chilled water can be increased, while the opening state remains unchanged, slowing down the flow rate of the chilled water in the motor cooling circuit, and relatively reducing the heat exchange efficiency.

[0129] Step 506: If the cooling water outlet temperature parameter is equal to the heat exchanger temperature parameter, the control opening state and the loop state remain unchanged.

[0130] The controller compares the cooling water outlet temperature parameter and the heat exchanger temperature parameter to obtain a comparison result. If the cooling water outlet temperature parameter is equal to the heat exchanger temperature parameter, it indicates that the temperature of the motor cooling circuit is the same as the temperature of the heat transfer circuit, and a balanced cooling efficiency has been achieved. At this time, the motor cooling circuit can be left unchanged, that is, the opening state and circuit state of the motor cooling circuit are controlled to remain unchanged.

[0131] In this embodiment, the motor cooling circuit is adjusted according to the cooling water outlet temperature parameters and the heat exchanger temperature parameters, and the cooling efficiency of the motor cooling circuit is adjusted in combination with the actual cooling requirements of the motor to achieve accurate cooling of the motor and keep the motor temperature stable.

[0132] In one embodiment, before step 204, the air conditioner motor cooling method further includes steps 602 to 604. Optionally, steps 602 to 604 may be before step 202 or after step 202. Figure 6 As shown, steps 602 to 604 are performed before step 220 .

[0133] Step 602, obtaining the operating mode of the air conditioner.

[0134] The air conditioner has different operating modes. For example, the air conditioner includes a cooling mode, an air supply mode, and a heating mode. The cooling mode and the air supply mode are both cooling modes, and the heating mode is a heating mode. The controller is connected to the air conditioner body of the air conditioner and can obtain the operating mode of the air conditioner. In some embodiments, the user can also control the air conditioner through the controller, that is, the controller controls the air conditioner body to switch the operating mode according to the user's instructions.

[0135] Step 604 , based on the operation mode, controlling the motor cooling circuit to adjust to a target flow state.

[0136] Different operation modes correspond to different control logics. The controller will control the motor cooling circuit based on the operation mode and adjust the flow state of the motor cooling circuit to the target flow state. The flow state is the flow direction of the chilled water in the motor cooling circuit. The target flow state includes a forward open state, a reverse open state and a closed state. When the chilled water flows from the motor water inlet pipe to the motor water return pipe, it is called a forward open state; when the chilled water flows from the motor water return pipe to the motor water inlet pipe, it is called a reverse open state; when the chilled water does not flow in the motor cooling circuit, it is called a closed state. Furthermore, when the opening water pump stops working or the opening is adjusted to the minimum, or when all the circuit control valves are closed, the motor cooling circuit is in a closed state.

[0137] In one embodiment, the operation mode includes a cooling mode and a heating mode, and the motor cooling circuit includes a flow control valve. Step 604 includes steps 702 to 704.

[0138] In one embodiment, the motor cooling circuit includes a flow control valve, which is arranged at a common end point where the pipelines of the heat transfer circuit and the motor cooling circuit are connected, and the flow control valve is used to control the flow direction of the chilled water in the motor cooling circuit.

[0139] Specifically, the flow control valve is a valve that can control the flow direction of the liquid in the connecting pipe. The flow control can be achieved by limiting the connection or by the working state of the flow control valve. In this embodiment, the flow control valve is arranged at the connection between the heat transfer circuit and the motor cooling circuit, that is, the place where the pipe of the heat transfer circuit and the pipe of the motor cooling circuit are connected, which is called the common end point. The flow control valve controls the flow direction at the common end point, thereby controlling the flow direction of the chilled water in the motor cooling circuit.

[0140] Furthermore, the flow direction control valve can be a four-way reversing valve, the heat transfer circuit includes an inlet manifold and a return manifold, the motor cooling circuit also includes a motor inlet pipe and a motor return pipe, the inlet manifold, the return manifold, the motor inlet pipe and the motor return pipe all converge at a common endpoint, and the four-way reversing valve is arranged at the common endpoint.

[0141] When the four-way reversing valve controls the water inlet manifold to connect to the motor water inlet pipe, and the water return manifold connects to the motor water return pipe, the chilled water in the motor cooling circuit flows from the motor water inlet pipe to the motor water return pipe, which is a forward opening state. When the four-way reversing valve controls the water inlet manifold to connect to the motor water return pipe, and the water return manifold connects to the motor water inlet pipe, the chilled water in the motor cooling circuit flows from the motor water return pipe to the motor water inlet pipe, which is a reverse opening state.

[0142] Step 702: If the operation mode is the cooling mode, the flow control valve is controlled to be adjusted to a forward opening state.

[0143] When the air conditioner is in cooling mode, that is, cooling mode or air supply mode, the controller controls the flow control valve to be adjusted to the forward opening state, that is, the water inlet manifold is connected to the motor water inlet pipe, and the return water manifold is connected to the motor water return pipe.

[0144] Furthermore, step 702 may also be performed before step 202, such as Figure 7 As shown, when the operation mode is the cooling mode, step 202 is executed. Step 702 may also be performed after step 202, and when the operation mode is the cooling mode, step 204 is executed.

[0145] Step 704: If the operation mode is the heating mode, the control flow control valve is adjusted to a reverse open state.

[0146] When the air conditioner is a combined air handling unit, the internal motor is exposed to the return air environment. When the air conditioner is operated in heating mode, the ambient temperature is low. When the motor itself is used for heat dissipation, the temperature rise is relatively slow. When the air conditioner is operated in heating mode, that is, heating mode, the controller controls the flow control valve to be adjusted to the reverse open state, that is, the water inlet manifold is controlled to connect to the motor return pipe, and the return manifold is controlled to connect to the motor water inlet pipe.

[0147] In one embodiment, the motor cooling circuit further includes an opening water pump and a circuit control valve, which have been described above and will not be described in detail here. Figure 8 As shown, after step 704, the air conditioning motor cooling method includes steps 802 to 804.

[0148] Step 802, obtaining a temperature difference parameter according to the temperature parameter.

[0149] Specifically, the controller obtains a temperature difference parameter based on the temperature parameter, and the temperature parameter includes a motor outer temperature parameter and a motor core temperature parameter, wherein the motor core temperature parameter can be directly obtained by a temperature detection device, or can be calculated based on the motor outer temperature parameter. The calculation formula has been recorded above and will not be repeated here. The controller calculates the temperature difference parameter based on the difference between the motor outer temperature parameter and the motor core temperature parameter, that is, the absolute value of the value obtained by subtracting the motor core temperature parameter from the motor outer temperature parameter is used as the temperature difference parameter.

[0150] Step 804, based on the comparison result between the preset temperature difference threshold and the temperature difference parameter, adjust the flow control valve, the opening of the water pump and the loop control valve.

[0151] Specifically, a preset temperature difference threshold is stored in the controller, and the preset temperature difference threshold can be any specified temperature value, such as 30° C. The controller compares the calculated temperature difference threshold with the preset temperature difference threshold to obtain a comparison result, and controls the flow control valve, the opening water pump and the loop control valve according to the comparison result to change the state of the motor cooling loop.

[0152] In an exemplary embodiment, step 804 includes steps 902 to 904 .

[0153] Step 902: If the preset temperature difference threshold is greater than or equal to the temperature difference parameter, the flow control valve is controlled to remain in the reverse open state, and the control opening of the water pump is increased, and the control loop control valve is turned on.

[0154] Specifically, if the comparison result obtained by the controller is that the preset temperature difference threshold is greater than or equal to the temperature difference parameter, that is, the temperature inside the motor is significantly different from the temperature outside the motor, that is, the motor accumulates more and more heat, and the heat dissipation needs to be increased as soon as possible. The controller controls the flow control valve to remain in the reverse open state, and controls the opening of the water pump to increase, controls the loop control valve to be turned on, and controls multiple loop control valves to be turned on, and can also control all loop control valves to be turned on.

[0155] Furthermore, the controller continuously calculates the motor core temperature parameters until the motor core temperature parameters are close to the set temperature value, such as the target set value T. The controller determines that the motor has cooled to a balanced state and can adjust the motor cooling circuit to the initial cooling flow path state.

[0156] Step 904: If the preset temperature difference threshold is less than the temperature difference parameter, the control flow control valve is closed.

[0157] If the comparison result obtained by the controller is that the preset temperature difference threshold is less than the temperature difference threshold, that is, the temperature inside the motor is not much different from the temperature of the environment outside the motor, it indicates that the motor is in good working condition and there is no need to dissipate heat for the motor. Therefore, the flow control valve can be controlled to be closed, that is, the flow control valve is in a closed state.

[0158] In this embodiment, by controlling the temperature of the air-conditioning motor in the heating mode, the cooling method of the air-conditioning motor in different operating modes is supplemented, so that the motor can achieve good and stable cooling in different operating modes, which is beneficial to improving the adaptability of the air conditioner.

[0159] Based on the same technical concept, the present application also provides an air conditioner, the air conditioner includes an air conditioner body, a motor, a motor cooling circuit and a controller, the air conditioner body includes a heat exchanger and a heat transfer circuit, the heat transfer circuit is arranged on the heat exchanger for transferring heat, the motor is connected to the air conditioner body, the motor cooling circuit is arranged on the motor and is connected to the heat transfer circuit;

[0160] The air conditioner body includes most of the components used to complete the functions of air conditioning, such as cooling and heating, and the motor is used to drive some components in the air conditioner body as the basis for the realization of the air conditioning function. The motor can drive the start of the air conditioner body, generate driving force and transmit it to the corresponding components in the air conditioner body to complete the air conditioning in coordination. Since the motor temperature rises due to the accumulation of heat during the use of the motor, a motor cooling circuit is also set on the motor to cool the motor. The controller can control the start and stop and working state of the air conditioner body, the motor and the motor cooling circuit according to the user's instructions or according to the preset program content. In the air conditioner body, the heat transfer circuit is a circuit that completes the air temperature regulation of the air conditioner. Chilled water flows in it, which can participate in the coordinated work of components such as the compressor, condenser and evaporator in the air conditioner body. The chilled water circulates in the heat transfer circuit to drive heat transfer and complete the air conditioning function of the air conditioner. The heat exchanger is a device that realizes heat transfer. It has good thermal conductivity and can release the heat carried by the chilled water as a heat source for other components in the air conditioner body, so that the air conditioner body can complete the air temperature regulation.

[0161] Correspondingly, the motor cooling circuit is a circuit pipeline for cooling the motor. In this embodiment, the pipeline of the motor cooling circuit is connected to the pipeline of the heat transfer circuit. When the chilled water in the heat transfer circuit flows in the pipeline, it can flow from the heat transfer circuit into the motor cooling circuit to cool the motor. Chilled water is a liquid that can easily take away and transfer heat. It can flow in the heat transfer circuit and the motor cooling circuit. When flowing through the motor cooling circuit, it takes away the heat emitted by the motor and cools the motor.

[0162] The motor cooling circuit is connected to the heat transfer circuit. At the connection point between the two, the motor cooling circuit needs to be provided with two pipes as flow channels for chilled water, so that the chilled water can enter the motor cooling circuit from the heat transfer circuit, and the chilled water can return from the motor cooling circuit to the heat transfer circuit. Therefore, the two pipes in the motor cooling circuit that are directly connected to the heat transfer circuit are respectively called the motor water inlet pipe and the motor water return pipe. Furthermore, there are different pipelines in the heat transfer circuit. In order to facilitate the flow of chilled water in the motor cooling circuit, a water inlet manifold and a water return manifold are provided in the heat transfer circuit. The chilled water first flows through the water inlet manifold in the heat transfer circuit, and then flows through the motor water inlet pipe of the motor cooling circuit, and flows out of the motor water return pipe of the motor cooling circuit to the water return manifold of the heat transfer circuit.

[0163] Specifically, the controller connects the heat transfer circuit, the motor and the motor cooling circuit. The heat exchanger and the heat transfer circuit can be used as a part of the air conditioner body to realize air conditioning. The controller controls the motor to drive the air conditioner body to drive the air conditioner body to complete air conditioning. At the same time, the controller can also obtain the working status of the heat transfer circuit and the motor cooling circuit, and control and adjust the motor cooling circuit according to the air conditioner motor cooling method recorded in the above embodiments to ensure the heat dissipation efficiency of the motor cooling circuit to the motor, thereby improving the heat dissipation while also ensuring the reliability of the air conditioner.

[0164] In one embodiment, the air conditioner further includes a temperature detection device, and the number of the temperature detection devices is multiple, which are respectively arranged in the heat transfer circuit, the motor and the motor cooling circuit, and the controller connects each temperature detection device and the motor cooling circuit.

[0165] The temperature detection device refers to a device that can detect temperature, including but not limited to temperature sensors, temperature sensing packages, thermometers and other types of temperature sensing elements. In the present embodiment, there are multiple temperature detection devices, which are respectively arranged in the heat transfer circuit, the motor and the motor cooling circuit, and can detect the temperatures of the heat transfer circuit, the motor and the motor cooling circuit. Optionally, the temperature detection device can be arranged on the side of the heat transfer circuit close to the heat exchanger, or on the surface of the motor, or at a position in the motor cooling circuit that is connected to the heat transfer circuit. In the present embodiment, the specific location of the temperature detection device is not limited, and it can be adjusted accordingly according to the different structural settings of the heat transfer circuit, the motor and the motor cooling circuit to ensure that the temperature detected by the temperature detection device is accurate. The temperature detected by the temperature detection device is transmitted to the controller, so that the controller can obtain the temperature parameters of the motor, the cooling water outlet temperature parameters and the heat exchanger temperature parameters.

[0166] In one embodiment, the motor is a magnetic levitation motor. The magnetic levitation motor uses a magnetic levitation bearing, and there is no mechanical contact between the stator and the mover, which greatly reduces the operating noise and has the characteristics of energy saving, high efficiency, and high system durability.

[0167] In one of the embodiments, the motor cooling circuit includes an opening water pump, which is arranged in a pipeline of the motor cooling circuit and is used to adjust the flow rate of the motor cooling circuit.

[0168] The opening water pump is a water pump with adjustable opening. When the opening changes, the driving speed of the water pump for the contacted liquid changes, that is, the flow rate changes. In this embodiment, the opening water pump is arranged in the pipeline of the motor cooling circuit, drives the chilled water in the motor cooling circuit, changes the flow rate of the chilled water in the motor cooling circuit, and then changes the flow rate of the chilled water.

[0169] Specifically, the opening water pump can drive the chilled water flowing into the motor cooling circuit in the heat transfer circuit, and pump the chilled water from the heat transfer circuit into the motor cooling circuit. The opening water pump has different pumping force levels corresponding to the opening. When the opening of the opening water pump increases, the higher the pumping force level for the chilled water, the faster the flow rate of the chilled water in the motor cooling circuit, and the larger the flow rate. Conversely, when the opening of the opening water pump decreases, the lower the pumping force level for the chilled water, the lower the flow rate of the chilled water in the motor cooling circuit.

[0170] Optionally, the specific position of the opening water pump in the motor cooling circuit is not limited, and it can be set at the common end point where the heat transfer circuit is connected to the motor cooling circuit, or it can be set at different positions in the pipeline of the motor cooling circuit. The opening water pump can achieve the flow rate regulation of the chilled water in the motor cooling circuit. Exemplarily, the opening water pump can be a gear water pump, and the opening is adjusted according to the meshing or rotation degree of the gear. Furthermore, the number of the opening water pumps is not limited, and it can be one or more, and the corresponding setting position can also be a combination of different positions. For example, the number of the opening water pumps is two, which are respectively set in the motor water inlet pipe and the motor water return pipe in the motor cooling circuit. For example, the number of the opening water pumps is one, which is set in the motor water inlet pipe or the motor water return pipe in the motor cooling circuit.

[0171] In this embodiment, by setting an opening water pump in the pipeline in the motor cooling circuit, the flow rate of the chilled water in the motor cooling circuit is adjusted, which can meet the needs of cooling the motor in different situations. The user can adjust the opening of the opening water pump according to the needs, and then adjust the cooling efficiency of the motor, achieve accurate cooling, and improve the adaptability of the air conditioner.

[0172] In one embodiment, the motor cooling circuit includes a flow control valve, which is arranged at a common end point where the pipelines of the heat transfer circuit and the motor cooling circuit are connected, and is used to control the connection direction of the motor cooling circuit and the heat transfer circuit.

[0173] Specifically, the flow control valve is a valve that can control the flow direction of the liquid in the connecting pipe. The flow control can be achieved by limiting the connection or by the working state of the flow control valve. In this embodiment, the flow control valve is arranged at the connection between the heat transfer circuit and the motor cooling circuit, that is, the place where the pipe of the heat transfer circuit and the pipe of the motor cooling circuit are connected, which is called the common end point. The flow control valve controls the flow direction at the common end point, thereby controlling the flow direction of the chilled water in the motor cooling circuit.

[0174] Furthermore, when the air conditioner Figure 1As shown, the flow control valve can be a one-way flow limiting valve, and the number of flow control valves is two groups, wherein two one-way valves form a group, and the one-way valves in each group are set in opposite directions. One group of flow control valves is set in the motor water inlet pipe, and the other group of flow control valves is set in the motor water return pipe. The two groups of flow control valves cooperate to control the flow direction of the chilled water in the motor cooling circuit. For example, the one-way valve in the motor water inlet pipe that conducts the direction of the motor cooling circuit is opened, the one-way valve in the motor water return pipe that conducts the direction of the heat transfer circuit is opened, and the other two one-way valves are not working. At this time, the flow direction of the chilled water in the motor cooling circuit is to flow in from the motor water inlet pipe and flow out from the motor water return pipe. In another case, the one-way valve in the motor water return pipe that conducts the direction of the motor cooling circuit is opened, the one-way valve in the motor water inlet pipe that conducts the direction of the heat transfer circuit is opened, and the other two one-way valves are not working. At this time, the flow direction of the chilled water in the motor cooling circuit is to flow in from the motor water return pipe and flow out from the motor water inlet pipe.

[0175] The flow control valve may also be other types of valves. In one embodiment, the flow control valve is a four-way reversing valve, the heat transfer circuit includes a water inlet manifold and a water return manifold, the motor cooling circuit also includes a motor water inlet pipe and a motor water return pipe, the water inlet manifold, the water return manifold, the motor water inlet pipe and the motor water return pipe all intersect at a common end point, and the four-way reversing valve is arranged at the common end point.

[0176] It should be noted that in the aforementioned embodiment, there are two common endpoints, one of which is located at the connection point between the water inlet header and the motor water inlet pipe, and the other common endpoint is located at the connection point between the water return header and the motor water return pipe. In this embodiment, there is one common endpoint, which is located at the connection point between the water inlet header, the water return header, the motor water inlet pipe, and the motor water return pipe. In this embodiment, unless otherwise specified, the common endpoint refers to the common endpoint where the water inlet header, the water return header, the motor water inlet pipe, and the motor water return pipe all intersect and connect, such as Fig. 9 As shown. And Fig. 9 The motor comprises a housing, and a part of the motor cooling circuit is arranged under the housing of the motor, which is not shown in the figure.

[0177] Specifically, see Fig. 9, the water inlet manifold of the heat transfer circuit leads out a branch pipe connected to a four-way reversing valve, the water outlet manifold of the heat transfer circuit leads out a branch pipe connected to a four-way reversing valve, and the motor return pipe and the motor inlet pipe are both connected to the four-way reversing valve. Since the flow direction of the chilled water in the heat switching circuit is fixed, the four-way reversing valve can switch the connected pipes according to demand, thereby controlling the flow direction of the chilled water in the motor cooling circuit. For example, when the four-way reversing valve controls the water inlet manifold to connect to the motor inlet pipe, and the return water manifold to connect to the motor return pipe, the flow direction of the chilled water in the motor cooling circuit is from the motor inlet pipe to the motor return pipe. When the four-way reversing valve controls the water inlet manifold to connect to the motor return pipe, and the return water manifold to connect to the motor inlet pipe, the flow direction of the chilled water in the motor cooling circuit is from the motor return pipe to the motor inlet pipe.

[0178] Furthermore, the opening water pump in the motor cooling circuit can be a gear water pump, which can be arranged in the motor water inlet pipe of the motor cooling circuit, or in the branch pipe led out from the water inlet manifold of the heat transfer circuit, or in the motor water return pipe of the motor cooling circuit, or in the branch pipe connected to the motor water return pipe, which merges into the water return manifold of the heat transfer circuit.

[0179] In this embodiment, a four-way reversing valve is provided at the common end point where the heat transfer circuit is connected to the motor cooling circuit, which can adjust the flow direction of the chilled water in the motor cooling circuit, make full use of the temperature difference of the chilled water between the inlet manifold and the return water manifold in the heat transfer circuit, achieve different cooling effects for the motor, and can match the cooling with the different heat accumulation conditions of the motor, which is beneficial to ensure the temperature stability of the motor and increase the working reliability of the air conditioner.

[0180] In one embodiment, the pipeline of the heat transfer circuit is provided with a connection hole, and the motor cooling circuit is connected to the heat transfer circuit through the connection hole. Since the motor cooling circuit uses the chilled water of the heat transfer circuit as a medium for cooling the motor, it is necessary to add a connection point in the original heat transfer circuit for connecting the motor cooling circuit. A connection hole is provided in the pipeline of the heat transfer circuit, and the motor cooling circuit is connected to the heat transfer circuit through the provided connection hole, so that the chilled water can flow smoothly.

[0181] Furthermore, the pipeline of the heat transfer loop includes an inlet header and a return header, and the inlet header is connected to the motor inlet pipe of the motor cooling loop, and the return header is connected to the motor return pipe of the motor cooling loop. Then, the inlet header and the return header of the heat transfer loop are both provided with openings, and correspondingly, the motor inlet pipe is connected to the inlet header through the connection hole on the inlet header, and the motor return header is connected to the return header through the connection hole on the return header. Optionally, the connection hole can be provided at the bottom of the heat transfer loop, and a certain pressure can be provided by using the gravitational potential energy, so as to facilitate the flow distribution of chilled water by using the pipeline pressure.

[0182] In one embodiment, the motor cooling circuit includes more than two cooling branches, and each cooling branch is connected to the heat transfer circuit.

[0183] The pipeline composition of the motor cooling circuit can be set according to demand, that is, the motor cooling circuit can include a pipe of uniform thickness, or it can include a network of pipes distributed in a capillary network. In this embodiment, the motor cooling circuit includes more than two cooling branches, each cooling branch is connected to the heat transfer circuit, wherein one end of each cooling branch converges to the motor water inlet pipe, which is connected to the water inlet manifold of the heat transfer circuit through the motor water inlet pipe, and the other end of each cooling branch converges to the motor return pipe, which is connected to the return water manifold of the heat transfer circuit through the motor return pipe. Specifically, each cooling branch is evenly laid on the surface of the motor, and chilled water flows inside each cooling branch to fully exchange heat with the motor to cool the motor.

[0184] Each cooling branch in the motor cooling circuit can cool the motor respectively, and the user can control the working state of the cooling branch according to the demand. In one embodiment, the motor cooling circuit also includes more than two circuit control valves, the number of circuit control valves matches the number of cooling branches, and each circuit control valve is respectively arranged in a different cooling branch and connected to the controller.

[0185] Specifically, at least one circuit control valve is provided in each cooling branch, and the circuit control valve can control the flow of chilled water in the cooling branch. When the circuit control valve is opened, the chilled water in the cooling branch can flow freely; when the circuit control valve is closed, the chilled water in the cooling branch cannot flow, which is equivalent to closing the cooling branch. Furthermore, in the case where the motor cooling circuit also includes a flow direction control valve, when the circuit control valve is opened, the flow direction of the chilled water in the cooling branch is determined by the flow direction control valve.

[0186] On this basis, in order to better cool the motor, each cooling branch, in one embodiment, the air conditioner also includes a circumferential spiral water pipe arranged around the motor, and each cooling branch is arranged on the motor and is connected to the circumferential spiral water pipe.

[0187] Among them, the circumferential spiral water pipe is a spiral groove pipe, which is a double-sided enhanced heat exchange pipe with excellent heat exchange performance, and has a significant enhancement process on the exchange process of single-phase fluid in the pipe. The inner wall of the circumferential spiral water pipe is provided with spiral grooves, so that part of the fluid is guided by the spiral grooves when flowing in the pipe, and part of the fluid close to the wall rotates along the groove; when the other part of the fluid flows axially along the wall, the spiral protrusions also cause periodic disturbances in the fluid. The former effect is conducive to thinning the fluid boundary layer; the latter effect causes disturbances in the fluid mass in the boundary layer, thereby accelerating the heat transfer from the wall to the main body of the fluid. The combined effect of the two effects enhances the heat exchange effect in the pipe.

[0188] Specifically, the circumferential spiral water pipe is arranged around the motor, is arranged close to the surface of the motor, or is arranged under the housing of the motor, so as to reduce the distance from the heat-generating devices such as the stator, rotor or coil of the motor, and further improve the heat dissipation efficiency. Furthermore, the number of circumferential spiral water pipes can match the number of cooling branches, and each cooling branch is connected with a circumferential spiral water pipe. Optionally, the pipeline of the cooling branch can also adopt a circumferential spiral water pipe, and the cooling branch partially surrounds the motor, and then the circumferential spiral water pipe surrounds the other part. In this case, each cooling branch can also directly surround the motor and cool the motor.

[0189] For example, Fig.10 As shown, there are two circumferential spiral water pipes, which are connected in parallel and spirally wound on the surface of the motor in sequence, and are in full contact with the motor. In order to distinguish the two circumferential spiral water pipes, they are marked as the first layer of circumferential spiral water pipes and the second layer of circumferential spiral water pipes, forming a double layer of circumferential spiral water pipes. The motor water inlet pipe is connected to two cooling branches (not shown in the figure), and the two cooling branches are connected to the two circumferential spiral water pipes respectively, completing the construction of the motor cooling circuit to facilitate the flow of chilled water in the circuit.

[0190] In order to better understand the above solution, a detailed explanation is given below in conjunction with a specific embodiment.

[0191] In one embodiment, the air conditioner is a combined air handling unit, such as Fig.11 As shown, the chilled water of the outdoor unit passes through the water inlet manifold and the water return manifold of the surface cooling section (part of the heat transfer loop), so that the chilled water circulates in the heat exchanger, exchanges cold (heat) with the air flowing through the surface of the heat exchanger, changes the temperature and humidity of the air, and meets the requirements of air conditioning. In this embodiment, the motor of the air conditioner is a magnetic suspension motor.

[0192] New holes are added as connecting holes on the water inlet and return manifolds of the heat transfer circuit, and a motor cooling circuit is provided to connect the motors for cooling the motors. Optionally, the holes are designed at the bottom of the two manifolds so as to use the pressure of the original manifolds to evenly distribute the chilled water. The motor cooling circuit includes a motor water inlet pipe and a gear water pump arranged on the motor water inlet pipe, and the motor cooling circuit also includes a motor water return pipe and a temperature sensing package arranged on the motor water return pipe. A four-way reversing valve is also provided in the pipeline of the motor cooling circuit, and the motor water inlet pipe and the motor water return pipe are connected by the four-way reversing valve, and the flow direction of the chilled water in the motor cooling circuit is controlled by the four-way reversing valve.

[0193] One end of the motor water inlet pipe is connected to the water inlet manifold, and the other end is connected to the circumferential spiral water pipe (such as Fig.10 As shown in the figure), one end of the motor return pipe is connected to the return manifold, and the other end is connected to the circumferential spiral water pipe in the magnetic levitation motor. At the same time, an inlet valve is also provided on the motor water inlet pipe. When the motor water inlet pipe is connected to multiple cooling branches, the motor cooling circuit also includes multiple inlet valves, which are respectively arranged in each cooling branch. Furthermore, an outlet valve is also provided on the motor return pipe. When the motor return pipe is connected to multiple cooling branches, the motor cooling circuit may include multiple outlet valves or one outlet valve. The inlet and outlet valves are connected to the double-layer circumferential spiral water pipe inside the motor to ensure the circulation of cooling water. When there are two cooling branches, the first cooling branch is connected to the first layer of circumferential spiral water pipes through the first inlet valve, and the second cooling branch is connected to the second layer of circumferential spiral water pipes through the second inlet valve. The summary of each cooling branch is connected and discharged by the outlet valve.

[0194] When the combined air handling unit is operating in cooling mode / air supply mode:

[0195] The controller starts synchronously with the start-up of the combined air handling unit. After identifying that the current operating mode is the cooling mode / air supply mode, the four-way reversing valve opens in the forward direction, detects the internal temperature T1 of the motor (the motor core temperature parameter) and compares it with the set target temperature T to determine the initial temperature rise. The initial temperature rise of the motor is not high, and the control water pump (opening water pump) is turned on at a low opening (low opening). Among the two water inlet valves (water inlet valve 1 and water inlet valve 2) in the motor cooling circuit, the water inlet valve 1 is controlled to open, so that the chilled water circulates in the first layer of the circumferential spiral pipe to take away the internal conduction heat of the motor.

[0196] Then, by detecting the motor outlet water pipe temperature T2 (cooling water outlet temperature parameter) and the unit heat exchanger return water temperature T0 (heat exchanger temperature parameter), the next step of precise feedback control is carried out:

[0197] If T2=T0, the water pump opening remains unchanged, and the internal temperature of the motor is gradually and steadily controlled according to the current state of the motor cooling circuit.

[0198] If T2<T0, the water pump opening remains unchanged, and the water inlet valve 2 is opened to enhance the heat exchange inside the motor until T2=T0.

[0199] If T2>T0, the water pump opening is increased, and the cooling and heat exchange process inside the motor is enhanced by increasing the water flow rate until T2=T0.

[0200] When the package air handling unit is operating in heating mode:

[0201] Because the motor inside the combined air handling unit is exposed to the return air environment, the ambient temperature is generally low when the heating mode is running, and the temperature rise is slow due to the motor's own heat dissipation.

[0202] The controller starts up synchronously with the combined air handling unit. After recognizing that the current operating mode is heating mode, the four-way reversing valve opens in the reverse direction, and detects the internal temperature T1 of the motor and the temperature T3 of the motor shell (temperature parameter of the motor outer side) to make a temperature difference judgment:

[0203] If the temperature difference = T3-T1<30℃, the four-way reversing valve is closed. At this time, there is no need for the motor cooling circuit to control the temperature, and the motor temperature can be stabilized by relying on the motor's own heat dissipation.

[0204] If the temperature difference = T3-T1≥30℃, the four-way reversing valve remains open in the reverse direction, the water pump is turned on at a high opening (high opening), the water inlet valve 1 and the water inlet valve 2 are opened at the same time, and the motor cooling circuit continues to operate until the internal temperature T1 of the motor is stably controlled to be infinitely close to the target set value T.

[0205] In this embodiment, part of the chilled water is directly supplied to the motor cooling circuit through the inlet and return water headers, while most of the chilled water is normally supplied to the heat exchanger for convective heat exchange in different modes of the unit. The motor water inlet pipe and the motor water return pipe are connected to the double-layer circumferential spiral water pipe set inside the motor. The combined air handling unit directly uses the chilled water of the surface cooling section as the cooling water source of the magnetic suspension motor in different operating modes, and controls the motor to cool down according to the air conditioning motor cooling method, controls the motor cooling circuit to accurately cool down the motor, and improves the cooling efficiency of the motor, which is both energy-saving and accurate.

[0206] It should be understood that, although the steps in the flowcharts involved in the above embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps is not strictly limited in order, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0207] Based on the same inventive concept, the embodiment of the present application also provides an air-conditioning motor cooling device for implementing the air-conditioning motor cooling method involved above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations in one or more air-conditioning motor cooling device embodiments provided below can refer to the limitations of the air-conditioning motor cooling method above, and will not be repeated here.

[0208] In an exemplary embodiment, Fig.12 As shown, an air conditioner motor cooling device is provided, including: an initial detection module 920, a fine adjustment module 940, a feedback detection module 960 and a feedback adjustment module 980, wherein:

[0209] The initial detection module 920 is used to obtain the temperature parameters of the motor of the air conditioner; the motor is provided with a motor cooling circuit, and the motor cooling circuit is used to cool the motor;

[0210] A fine-tuning module 940, for controlling the motor cooling circuit to adjust to an initial cooling flow path state based on the temperature parameter;

[0211] Feedback detection module 960, used to obtain the cooling water outlet temperature parameter of the motor cooling circuit and the heat exchanger temperature parameter of the air conditioner;

[0212] The feedback adjustment module 980 is used to control the motor cooling circuit to adjust to the target cooling flow path state according to the cooling water outlet temperature parameters and the heat exchanger temperature parameters.

[0213] In one embodiment, the temperature parameters include motor outer temperature parameters and motor core temperature parameters. The initial detection module 920 is further used to obtain the motor outer temperature parameters and determine the motor core temperature parameters according to the motor circuit parameters and the motor outer temperature parameters.

[0214] In one embodiment, the state of the motor cooling circuit includes an opening state and a circuit state, and the fine-tuning module 940 is also used to adjust the opening state of the motor cooling circuit according to the temperature parameter and the preset temperature parameter, and control the circuit state of the motor cooling circuit to be a basic circuit.

[0215] In one of the embodiments, the state of the motor cooling circuit includes an opening state and a circuit state, and the feedback adjustment module 980 is also used to adjust the opening state to increase if the cooling water outlet temperature parameter is greater than the heat exchanger temperature parameter, and control the circuit state to be a basic circuit or a compound circuit; if the cooling water outlet temperature parameter is less than the heat exchanger temperature parameter, control the opening state to remain unchanged, and control the circuit state to be a compound circuit; if the cooling water outlet temperature parameter is equal to the heat exchanger temperature parameter, control the opening state and the circuit state to remain unchanged.

[0216] In one of the embodiments, the air conditioner motor cooling device also includes an initial operation module, which is used to obtain the operating mode of the air conditioner before controlling the motor cooling circuit to adjust to the initial cooling flow path state based on the temperature parameters, and based on the operating mode, control the motor cooling circuit to adjust to the target flow direction state.

[0217] In one embodiment, the operating mode includes a cooling mode and a heating mode, the motor cooling circuit includes a flow control valve, and the initial operation module is also used to control the flow control valve to be adjusted to a forward open state if the operating mode is a cooling mode; if the operating mode is a heating mode, the flow control valve is controlled to be adjusted to a reverse open state.

[0218] In one embodiment, the air conditioner motor cooling device may include a mode operation module, the mode operation module includes a heating operation module and a cooling operation module, wherein the cooling operation module includes a fine-tuning module 940, a feedback detection module 960 and a feedback adjustment module 980. The motor cooling circuit also includes an opening water pump and a circuit control valve, and the heating operation module is used to obtain a temperature difference parameter according to a temperature parameter after the operation mode is the heating mode and the flow control valve is adjusted to a reverse opening state, and adjust the flow control valve, the opening water pump and the circuit control valve based on the comparison result between the preset temperature difference threshold and the temperature difference parameter.

[0219] In one of the embodiments, the temperature rise operation module is also used to control the flow control valve to remain in the reverse open state, and control the opening of the water pump to increase, and control the loop control valve to be turned on if the preset temperature difference threshold is greater than or equal to the temperature difference parameter; if the preset temperature difference threshold is less than the temperature difference parameter, the flow control valve is controlled to be closed.

[0220] Each module in the above air-conditioning motor cooling device can be implemented in whole or in part by software, hardware and a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute operations corresponding to each module.

[0221] In an exemplary embodiment, a computer device is provided. The computer device may be a terminal, and its internal structure diagram may be as shown in FIG. Fig.13 As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, near field communication (NFC) or other technologies. When the computer program is executed by the processor, a method for cooling an air conditioner motor is implemented. The display unit of the computer device is used to form a visually visible picture, which can be a display screen, a projection device or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0222] Those skilled in the art will understand that Fig.13 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0223] In one embodiment, a computer device is further provided, including a memory and a processor, wherein a computer program is stored in the memory, and the processor implements the steps in the above-mentioned method embodiments when executing the computer program.

[0224] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored. When the computer program is executed by a processor, the steps in the above-mentioned method embodiments are implemented.

[0225] In one embodiment, a computer program product is provided, including a computer program, which implements the steps in the above method embodiments when executed by a processor.

[0226] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0227] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0228] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for cooling an air conditioner motor, characterized in that: The method comprises: Acquire temperature parameters of a motor of the air conditioner; the motor is provided with a motor cooling circuit, and the motor cooling circuit is used to cool the motor; Based on the temperature parameter, the motor cooling circuit is controlled to adjust to an initial cooling flow path state; Obtaining a cooling water outlet temperature parameter of the motor cooling circuit and a heat exchanger temperature parameter of the air conditioner; According to the cooling water outlet temperature parameter and the heat exchanger temperature parameter, the motor cooling circuit is controlled to adjust to a target temperature reduction flow path state.

2. The method according to claim 1, characterized in that The temperature parameters include motor outer temperature parameters and motor core temperature parameters. The step of obtaining the temperature parameters of the motor of the air conditioner includes: Obtaining the temperature parameter of the outer side of the motor; The motor core temperature parameter is determined according to the circuit parameter of the motor and the motor outer temperature parameter.

3. The method according to claim 1, characterized in that The state of the motor cooling circuit includes an opening state and a circuit state, and the controlling the motor cooling circuit to adjust to an initial cooling flow path state based on the temperature parameter includes: The opening state of the motor cooling circuit is adjusted according to the temperature parameter and the preset temperature parameter, and the circuit state of the motor cooling circuit is controlled to be a basic circuit.

4. The method according to claim 1, characterized in that: The state of the motor cooling circuit includes an opening state and a circuit state. According to the cooling water outlet temperature parameter and the heat exchanger temperature parameter, controlling the motor cooling circuit to adjust to a target cooling flow path state includes: If the cooling water outlet temperature parameter is greater than the heat exchanger temperature parameter, the opening state is adjusted to increase, and the circuit state is controlled to be a basic circuit or a compound circuit; If the cooling water outlet temperature parameter is less than the heat exchanger temperature parameter, the opening state is controlled to remain unchanged, and the circuit state is controlled to be the composite circuit; If the cooling water outlet temperature parameter is equal to the heat exchanger temperature parameter, the opening state and the circuit state are controlled to remain unchanged.

5. The method according to claim 1, characterized in that Before controlling the motor cooling circuit to adjust to the initial cooling flow path state based on the temperature parameter, the method further includes: Acquire the operating mode of the air conditioner; Based on the operation mode, the motor cooling circuit is controlled to adjust to a target flow direction state.

6. The method according to claim 5, characterized in that The operation mode includes a cooling mode and a heating mode, the motor cooling circuit includes a flow direction control valve, and based on the operation mode, controlling the motor cooling circuit to adjust to a target flow direction state includes: If the operation mode is the cooling mode, the flow control valve is controlled to be adjusted to a forward opening state; If the operation mode is the heating mode, the flow direction control valve is controlled to be adjusted to a reverse opening state.

7. The method according to claim 6, characterized in that The motor cooling circuit also includes an opening water pump and a circuit control valve. If the operation mode is a heating mode, after the flow control valve is controlled to be adjusted to a reverse opening state, the method further includes: Obtaining a temperature difference parameter according to the temperature parameter; Based on the comparison result between the preset temperature difference threshold and the temperature difference parameter, the flow direction control valve, the opening water pump and the loop control valve are adjusted.

8. The method according to claim 7, characterized in that The method of adjusting the flow control valve, the opening water pump and the loop control valve based on the comparison result between the preset temperature difference threshold and the temperature difference parameter comprises: If the preset temperature difference threshold is greater than or equal to the temperature difference parameter, the flow direction control valve is controlled to remain in a reverse open state, the opening of the water pump is controlled to increase, and the loop control valve is controlled to be turned on; If the preset temperature difference threshold is less than the temperature difference parameter, the flow direction control valve is controlled to be closed.

9. An air conditioning motor cooling device, characterized in that: The device comprises: An initial detection module, used to obtain temperature parameters of a motor of the air conditioner; the motor is provided with a motor cooling circuit, and the motor cooling circuit is used to cool the motor; A fine-tuning module, used for controlling the motor cooling circuit to adjust to an initial cooling flow path state based on the temperature parameter; A feedback detection module, used to obtain the cooling water outlet temperature parameter of the motor cooling circuit and the heat exchanger temperature parameter of the air conditioner; The feedback regulation module is used to control the motor cooling circuit to adjust to a target cooling flow path state according to the cooling water outlet temperature parameter and the heat exchanger temperature parameter.

10. An air conditioner, characterized in that: The air conditioner comprises an air conditioner body, a motor, a motor cooling circuit and a controller, the air conditioner body comprises a heat exchanger and a heat transfer circuit, the heat transfer circuit is arranged at the heat exchanger for transferring heat, the motor is connected to the air conditioner body, the motor cooling circuit is arranged at the motor and communicates with the heat transfer circuit; The controller is connected to the heat transfer circuit, the motor and the motor cooling circuit, and is used to implement the air conditioning motor cooling method according to any one of claims 1-8.

11. The air conditioner according to claim 10, characterized in that: The air conditioner further comprises a temperature detection device, and the number of the temperature detection devices is multiple and they are respectively arranged in the heat transfer circuit, the motor and the motor cooling circuit, and the controller connects each of the temperature detection devices and the motor cooling circuit.

12. The air conditioner according to claim 10, characterized in that: The motor is a magnetic levitation motor.

13. The air conditioner according to claim 10, characterized in that: The motor cooling circuit comprises an opening water pump, which is arranged in a pipeline of the motor cooling circuit and is used to adjust the flow rate of the motor cooling circuit.

14. The air conditioner according to claim 10, characterized in that: The motor cooling circuit includes a flow direction control valve, which is arranged at a common end point where the pipelines of the heat transfer circuit and the motor cooling circuit are connected, and is used to control the connection direction between the motor cooling circuit and the heat transfer circuit.

15. The air conditioner according to claim 10, characterized in that: The motor cooling circuit includes more than two cooling branches, and each of the cooling branches is connected to the heat transfer circuit.

16. The air conditioner according to claim 15, characterized in that: The motor cooling circuit also includes more than two circuit control valves, the number of the circuit control valves matches the number of the cooling branches, and each circuit control valve is respectively arranged in a different cooling branch and is connected to the controller.

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