Air conditioner driver, air conditioner system and vehicle

Abstract

The invention provides an air conditioner driver, an air conditioner system and a vehicle, and belongs to the technical field of new energy vehicles. The air conditioner driver comprises a controller and a humidity detection circuit. The humidity detection circuit includes a first bare conductor, a second bare conductor, and a first resistor. Wherein the first bare conductor and the second bare conductor are adjacent and arranged at an interval, the first bare conductor is connected with a first end of the first resistor, a second end of the first resistor is used for receiving power supply voltage, and the second bare conductor is grounded; the connection node of the first bare wire and the first resistor is connected with the controller, and the voltage of the connection node of the first bare wire and the first resistor is used for indicating the humidity value of the environment where the air conditioner driver is located. The controller is used for determining the humidity value of the environment where the air conditioner driver is located according to the voltage of the connecting node of the first bare wire and the first resistor. According to the embodiment of the invention, the safety problem caused by the fault of the air conditioner driver is reduced.

Description

Technical Field

[0001] The present application relates to the technical field of new energy vehicles, and in particular to an air-conditioning driver, an air-conditioning system, and a vehicle. Background Art

[0002] In electric vehicles, the air conditioning system not only regulates cabin temperature but also plays a crucial role in heating and cooling the onboard power battery. The air conditioning driver in this system is typically installed in the front compartment of the vehicle. Not only is the ambient temperature high, but it is also exposed to harsh operating conditions such as water, sand, and dust. This can easily cause the seals of the air conditioning driver to age and become loose, making the driver susceptible to failure. Furthermore, since the air conditioning driver uses the high voltage of the onboard power battery, a failure can pose a significant safety hazard to the vehicle. Summary of the Invention

[0003] The purpose of the present application is to provide an air-conditioning driver, an air-conditioning system, and a vehicle, aiming to reduce safety issues caused by failure of the air-conditioning driver.

[0004] In a first aspect, an air conditioner driver is provided. The air conditioner driver includes a controller and a humidity detection circuit; the humidity detection circuit includes a first bare wire, a second bare wire, and a first resistor. The first bare wire and the second bare wire are adjacent to and spaced apart from each other. The first bare wire is connected to the first end of the first resistor, the second end of the first resistor is used to receive a power supply voltage, and the second bare wire is grounded. The node connecting the first bare wire and the first resistor is connected to the controller, and the voltage at the node connecting the first bare wire and the first resistor is used to indicate the humidity value of the environment in which the air conditioner driver is located. The controller is configured to determine the humidity value of the environment in which the air conditioner driver is located based on the voltage at the node connecting the first bare wire and the first resistor.

[0005] In an embodiment of the present application, when the seal of the air conditioner driver is intact and the air conditioner driver is in a dry environment, the resistance between the first bare wire and the second bare wire is infinite, equivalent to an open circuit, and the power supply voltage and ground cannot form a load circuit. Therefore, the voltage at the connection node between the first bare wire and the first resistor is the power supply voltage. When the seal of the air conditioner driver ages or falls off, water or fog easily enters the air conditioner driver. When the environment where the internal circuit of the air conditioner driver is located is humid, the electrolyte dissolved in the water or fog will cause the insulation between the first bare wire and the second bare wire to degrade, reducing the resistance. The higher the humidity, the lower the resistance between the first bare wire and the second bare wire. After voltage division with the first resistor, the voltage at the connection node between the first bare wire and the first resistor also decreases with increasing humidity, thereby indicating the humidity value of the environment where the air conditioner driver is located. The connection node between the first bare wire and the first resistor is connected to the controller, so that the controller can determine the humidity value of the environment where the air conditioner driver is located based on the voltage at the connection node between the first bare wire and the first resistor. The humidity value of the environment in which the air-conditioning driver is located can determine the sealing of the air-conditioning driver on the one hand, and the insulation of the internal circuit of the air-conditioning driver on the other hand. To a certain extent, it can identify the possibility of failure of the air-conditioning driver so that users and manufacturers can deal with it in time, thereby reducing or even avoiding leakage of electricity in the internal circuit of the air-conditioning driver due to poor insulation between internal components; that is, the implementation method of the present application reduces safety issues caused by failure of the air-conditioning driver.

[0006] Optionally, the first bare wire includes a first connecting portion and a plurality of first extension portions, the plurality of first extension portions are spaced apart, and one end of the plurality of first extension portions is connected to the first connecting portion. The second bare wire includes a second connecting portion and a plurality of second extension portions, the plurality of second extension portions are spaced apart, and one end of the plurality of second extension portions is connected via the second connecting portion. The first extension portions and the second extension portions are alternately arranged along a first direction, where the first direction is the arrangement direction of the plurality of first extension portions. The alternating arrangement of the first extension portions and the second extension portions along the arrangement direction of the first extension portion (the first extension portion) can reduce the area occupied by the first bare wire and the second bare wire while ensuring that the first bare wire and the second bare wire can have a longer equivalent length, thereby helping to improve the accuracy of humidity monitoring.

[0007] Optionally, both the first bare wire and the second bare wire are placed in a blank space on the air conditioner driver's printed circuit board. This eliminates the need for extensive adjustments to the printed circuit board layout, requiring only minor modifications to the air conditioner driver's existing circuitry. This eliminates the need for expensive components like humidity sensors, allowing the existing controller of the air conditioner driver to collect humidity data, thus reducing development cycles.

[0008] Optionally, the humidity detection circuit further includes a filtering subcircuit, wherein the node between the first bare wire and the first resistor is connected to the controller via the filtering subcircuit. The voltage at the node between the first bare wire and the first resistor can be filtered out by the filtering subcircuit to remove most interference signals, thereby improving the accuracy of humidity detection.

[0009] Optionally, the filtering subcircuit includes a second resistor and a first capacitor. The node where the first bare wire connects to the first resistor is connected to the first end of the second resistor. The second end of the second resistor is connected to the controller and the first end of the first capacitor, respectively. The second end of the first capacitor is grounded. The filtering subcircuit utilizes a resistor-capacitor (RC) filtering circuit, which has a simple structure and requires minimal modification to the existing circuitry of the air conditioner driver.

[0010] Optionally, the system further includes a communication module, with the controller connected to the communication module. In response to the humidity value of the air conditioner driver's environment exceeding a first alarm value, determining that the humidity has begun to change, the controller controls internal memory to store the current humidity value and the current time. In response to the humidity value of the air conditioner driver's environment exceeding a second alarm value, which is greater than the first alarm value, determining that the environment is slightly humid, the controller also issues a warning signal through the communication module, reporting the current humidity value. If a user observes this signal, preemptive repairs can be performed before a dangerous situation occurs, thereby reducing safety issues caused by air conditioner driver failures.

[0011] Optionally, the system further includes a drive circuit connected to a drive power supply, and a controller connected to the drive circuit for controlling a drive voltage output by the drive circuit. In response to the humidity value of the environment in which the air conditioner driver is located being greater than a third alarm value, which is greater than the second alarm value, indicating that the environment is moderately humid, the controller further outputs a signal instructing the drive circuit to disconnect from the drive power supply to ensure the safety of the vehicle and associated personnel.

[0012] Optionally, in response to the humidity value of the environment where the air-conditioning driver is located being greater than the fourth alarm value, and the fourth alarm value being greater than the third alarm value, it is determined to be severely humid. The controller also locks its own state through a program to stop working (turns off all control outputs and signal reception processing) to avoid safety problems that may be caused by human error.

[0013] Optionally, the device further includes a drive circuit and a leakage current detection circuit. The drive circuit is used to connect to a drive power supply. The controller is also connected to the drive circuit, and the controller is used to control the drive voltage output by the drive circuit. The leakage current detection circuit includes a positive current detection circuit and a negative current detection circuit. The positive pole of the drive power supply is connected to the drive circuit via the positive current detection circuit, and the negative pole of the drive power supply is connected to the drive circuit via the negative current detection circuit. The positive current detection circuit is also connected to the controller for outputting a positive detection current to the controller. The negative current detection circuit is also connected to the controller for outputting a negative detection current to the controller.

[0014] In the load's current loop, the positive and negative currents are equal. If there's a deviation between the positive and negative current values, it means some of the current is flowing back into the power supply through other circuits (such as the housing). In this embodiment, the positive current detection circuit outputs the positive detection current to the controller, and the negative current detection circuit outputs the negative detection current to the controller. The controller can perform real-time analysis on the positive and negative detection currents to determine whether a leakage problem has occurred.

[0015] Optionally, the positive current detection circuit includes a Hall effect current sensor. The positive electrode of the driving power supply is connected to the driving circuit via the Hall effect current sensor, which is also connected to the controller. The Hall effect current sensor is high voltage resistant and has a long service life even under the high voltage of the positive electrode of the driving power supply.

[0016] Optionally, the negative current detection circuit includes a third resistor and an operational amplifier. The negative electrode of the driving power supply is connected to the driving circuit via the third resistor. The first input of the operational amplifier is connected to the first end of the third resistor. The second input of the operational amplifier is connected to the second end of the third resistor. The output of the operational amplifier is connected to the controller. The negative electrode of the driving power supply is grounded. The structure of detecting current via the third resistor and the operational amplifier is simple and occupies a small area.

[0017] Optionally, the controller is further configured to: determine a leakage current value based on a difference between the positive electrode detection current and the negative electrode detection current; and determine that leakage occurs when the leakage current value is greater than a leakage alarm value.

[0018] Optionally, in the event of leakage, the controller controls the drive circuit to output a drive voltage, starts the motor connected to the drive circuit, and determines the startup leakage current value at that time; and controls the drive circuit to stop outputting the drive voltage, stops the motor connected to the drive circuit, and determines the shutdown leakage current value at that time. In response to the startup leakage current value being greater than or equal to the shutdown leakage current value, the controller determines that the motor connected to the drive circuit is leaking. In response to the startup leakage current value being less than the shutdown leakage current value, the controller determines that the air conditioner driver is leaking. This facilitates manufacturers to pinpoint the location of the leakage, helping to reduce repair time and improve user experience.

[0019] Optionally, in response to the leakage current value exceeding a first leakage alarm value, the controller controls internal memory to store the leakage current value and the current time, and issues a leakage warning signal via the communication module. The leakage warning signal indicates the leakage and its location. If a user observes this signal, they can initiate repairs before a dangerous situation occurs, thereby reducing safety issues caused by air conditioner driver failure.

[0020] Optionally, in response to the leakage current value being greater than the second leakage alarm value, and the second leakage alarm value being greater than the first leakage alarm value, the controller also outputs a signal indicating that the drive circuit is disconnected from the drive power supply, and locks its own state through a program to stop working (turning off all control outputs and signal reception processing) to avoid safety problems that may be caused by human error.

[0021] Optionally, a switch circuit is further included, one end of which is connected to the drive circuit, and the other end of which is connected to a drive power supply. A controller is also connected to the switch circuit. Under normal circumstances, the controller controls the switch circuit to connect the drive circuit to the drive power supply by turning it on. When the humidity value is high or the leakage current value is high, the controller controls the switch circuit to disconnect the drive circuit from the drive power supply by turning it off.

[0022] Optionally, the switching circuit includes a relay, a switching tube and a diode; wherein one end of the relay switch is connected to the drive circuit, and the other end of the relay switch is used to connect to the driving power supply. The first end of the relay coil is used to receive the power supply voltage, the second end of the relay coil is connected to the first controlled end of the switching tube, the second controlled end of the switching tube is grounded, and the control end of the switching tube is connected to the controller. The anode end of the diode is connected to the first end of the relay coil, and the cathode end of the diode is connected to the second end of the relay coil. When the switching tube is turned on, the relay coil is energized to generate a magnetic field, causing the relay switch to close. When the switching tube is turned off, the relay coil is de-energized and no magnetic field is generated, causing the relay switch to resume opening, thereby cutting off the current. In addition, the embodiment of the present application also provides a diode to suppress the current spikes generated when the switching tube is turned on and off, thereby protecting the relay coil.

[0023] In a second aspect, an air conditioner driver is also provided. The air conditioner driver includes a controller, a drive circuit, and a leakage current detection circuit. The drive circuit is connected to a drive power supply, and the controller is connected to the drive circuit. The controller is used to control the drive voltage output by the drive circuit. The controller is also connected to the leakage current detection circuit. The leakage current detection circuit includes a positive current detection circuit and a negative current detection circuit. The positive electrode of the drive power supply is connected to the drive circuit via the positive current detection circuit, and the negative electrode of the drive power supply is connected to the drive circuit via the negative current detection circuit. The positive current detection circuit is also connected to the controller for outputting a positive detection current to the controller. The negative current detection circuit is also connected to the controller for outputting a negative detection current to the controller.

[0024] Optionally, the controller is further configured to: determine a leakage current value based on a difference between the positive electrode detection current and the negative electrode detection current; and determine that leakage occurs when the leakage current value is greater than a leakage alarm value.

[0025] Optionally, the controller is further configured to: in the event of leakage, control the drive circuit to output a drive voltage, control the motor connected to the drive circuit to start, and determine the startup leakage current value at that time; and control the drive circuit to stop outputting the drive voltage, control the motor connected to the drive circuit to stop, and determine the shutdown leakage current value at that time. In response to the startup leakage current value being greater than or equal to the shutdown leakage current value, it is determined that the motor connected to the drive circuit is leaking; in response to the startup leakage current value being less than the shutdown leakage current value, it is determined that the air conditioner driver is leaking.

[0026] Optionally, the controller is also configured to: in response to the leakage current value being greater than the first leakage alarm value, control the internal memory to store the leakage current value and the current time, and send a leakage warning signal through the communication module, the leakage warning signal being used to indicate the occurrence of leakage and the location where the leakage occurs.

[0027] Optionally, the controller is further configured to: in response to the leakage current value being greater than a second leakage alarm value, output a signal instructing the drive circuit to disconnect from the drive power supply and stop working; wherein the second leakage alarm value is greater than the first leakage alarm value.

[0028] In a third aspect, an air-conditioning system is provided. The air-conditioning system includes an integrated valve, a heating element, a heat exchanger, and multiple motors, and an air-conditioning driver according to any one of the first and second aspects. The integrated valve, heating element, heat exchanger, and multiple motors are all connected to the air-conditioning driver, and the air-conditioning driver is used to control the integrated valve, heating element, heat exchanger, and multiple motors. Among them, the multiple motors include a compressor motor, a water pump motor, and a fan motor. In other words, the air-conditioning driver can control multiple modules such as a compressor, a heating element (for example, a PTC heating element), a water pump, a fan, and a heat exchanger (for example, a plate heat exchanger). Control is concentrated in one controller, which reduces problems such as delays, and also reduces problems such as poor line contact, aging, and other problems that cause components to malfunction or signal confusion.

[0029] Optionally, an integrated valve integrates a solenoid valve, an electronic expansion valve, and a pressure sensor. The integrated valve is connected to the air conditioner driver via a molded-in component. This reduces wiring and connector connections, saving space and reducing usage errors.

[0030] In a fourth aspect, a vehicle is provided, comprising a vehicle frame and the air-conditioning system according to any one of the third aspects, wherein the air-conditioning system is disposed in the vehicle frame.

[0031] It should be understood that the technical effects of the second to fourth aspects can be specifically referred to the relevant description in the first aspect, and this application will not go into details here. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0033] Figure 1 A schematic diagram of the circuit structure of the first air-conditioning driver provided in an embodiment of the present application;

[0034] Figure 2 A schematic structural diagram of a first bare wire and a second bare wire provided in an embodiment of the present application;

[0035] Figure 3 A schematic diagram of the humidity detection control logic of the controller provided in the embodiment of the present application;

[0036] Figure 4 A schematic diagram of the circuit structure of a second air-conditioning driver provided in an embodiment of the present application;

[0037] Figure 5 A schematic diagram of one control logic for performing leakage detection for a controller provided in an embodiment of the present application;

[0038] Figure 6 Another control logic diagram of the controller for performing leakage detection provided in an embodiment of the present application;

[0039] Figure 7 A schematic diagram of the circuit structure of a third air-conditioning driver provided in an embodiment of the present application;

[0040] Figure 8 A schematic structural diagram of the air-conditioning system provided in an embodiment of the present application.

[0041] Reference numerals:

[0042] 100. Air conditioner driver; 110. Controller; 120. Humidity detection circuit; 121. Filter sub-circuit; 130. Drive circuit; 140. Communication module; 150. Switch circuit; 160. Filter; 170. Leakage current detection circuit; 171. Positive current detection circuit; 172. Negative current detection circuit; 210. First bare wire; 211. First connecting portion; 212. First extension portion; 220. Second bare wire; 221. Second connecting portion; 222. Second extension portion; 300. Integrated valve; 400. Heating element; 500. Heat exchanger; 600. Motor. DETAILED DESCRIPTION

[0043] In the embodiments of the present application, the terms "first," "second," "third," "fourth," "fifth," and "sixth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, a feature specified as "first," "second," "third," "fourth," "fifth," and "sixth" may explicitly or implicitly include one or more of the features.

[0044] In the embodiments of the present application, the terms "comprises," "comprising," or any other variations thereof are intended to encompass non-exclusive inclusion, such that a process, method, article, or apparatus comprising a series of elements includes not only those elements but also other elements not explicitly listed, or elements inherent to such process, method, article, or apparatus. In the absence of further limitations, an element defined by the phrase "comprising a ..." does not preclude the presence of other identical elements in the process, method, article, or apparatus comprising the element.

[0045] In the field of new energy vehicles, onboard power batteries not only provide energy for the entire vehicle, but also provide power support for various modules (such as the air conditioning system). The air conditioning system not only regulates the temperature in the cabin, but also heats and cools the onboard power battery, playing a very important role. The air conditioning driver in the air conditioning system is usually installed in the front compartment of the vehicle. Not only is the ambient temperature high, but it is also exposed to harsh working environments such as wading through water and dust. This can easily cause the seal of the air conditioning driver to age and fall off, making the air conditioning driver prone to failure. If the air conditioning driver is prone to failure, causing the entire vehicle to leak electricity or break down, it may endanger the safety of the user.

[0046] To this end, the embodiment of the present application provides an air conditioner driver 100. Figure 1 As shown, the air conditioner driver 100 includes a controller 110, a humidity detection circuit 120, a drive circuit 130, a communication module 140, a switch circuit 150, and a filter 160. The controller 110 is connected to the drive circuit 130, the communication module 140, the switch circuit 150, and the humidity detection circuit 120, respectively. The drive circuit 130 is used to connect the drive voltage. The switch circuit 150 and the filter 160 are provided between the drive power supply and the drive circuit 130 to filter the voltage provided by the drive power supply.

[0047] like Figure 1 and Figure 2 As shown, the humidity detection circuit 120 includes a first bare wire 210, a second bare wire 220, and a first resistor R1. The first bare wire 210 and the second bare wire 220 are adjacent and spaced apart. The first bare wire 210 is connected to the first end of the first resistor R1, the second end of which is used to receive a power supply voltage VCC. The second bare wire 220 is connected to ground GND. The node connecting the first bare wire 210 and the first resistor R1 is connected to the controller 110. The voltage at the node is used to indicate the humidity value of the environment in which the air conditioner driver 100 is located. The controller 110 is configured to determine the humidity value of the environment in which the air conditioner driver 100 is located based on the voltage at the node connecting the first bare wire 210 and the first resistor R1.

[0048] like Figure 2As shown, in some examples, a first bare conductor 210 includes a first connecting portion 211 and multiple first extension portions 212. The multiple first extension portions 212 are spaced apart, and one end of each of the multiple first extension portions 212 is connected to the first connecting portion 211. A second bare conductor 220 includes a second connecting portion 221 and multiple second extension portions 222. The multiple second extension portions 222 are spaced apart, and one end of each of the multiple second extension portions 222 is connected by the second connecting portion 221. The first extension portions 212 and the second extension portions 222 are alternately arranged along a first direction, which is the direction in which the multiple first extension portions 212 are arranged. The alternating arrangement of the first extension portions 212 and the second extension portions 222 along the direction in which the multiple first extension portions 212 are arranged can reduce the area occupied by the first and second bare conductors 210, 220 while ensuring that the first and second bare conductors 210, 220 have a longer equivalent length, thereby improving the accuracy of humidity monitoring.

[0049] In some embodiments, the first bare wire 210 and the second bare wire 220 are both placed in blank spaces on the printed circuit board (PCB) of the air conditioner driver 100. This eliminates the need for extensive adjustments to the PCB layout and only requires minor modifications to the existing circuitry of the air conditioner driver 100. This eliminates the need for adding costly components like humidity sensors and allows the existing controller 110 of the air conditioner driver 100 to collect humidity data, thus reducing development cycles.

[0050] Please continue to refer to Figure 1 In some embodiments, the humidity detection circuit 120 further includes a filtering subcircuit 121. The connection node between the first bare wire 210 and the first resistor R1 is connected to the controller 110 via the filtering subcircuit 121. The voltage at the connection node between the first bare wire 210 and the first resistor R1 can filter out most interference signals through the filtering subcircuit 121, thereby improving the accuracy of humidity detection.

[0051] In some examples, the filter subcircuit 121 includes a second resistor R2 and a first capacitor C1. The node where the first bare wire 210 connects to the first resistor R1 is connected to the first end of the second resistor R2. The second end of the second resistor R2 is connected to the controller 110 and the first end of the first capacitor C1, respectively. The second end of the first capacitor C1 is connected to ground GND. The filter subcircuit 121 utilizes a resistor-capacitor (RC) filter circuit, which has a simple structure and requires minimal modification to the existing circuitry of the air conditioner driver 100.

[0052] In the embodiment of the present application, when the seal of the air conditioner driver 100 is intact and the air conditioner driver 100 is in a dry environment, the resistance between the first bare wire 210 and the second bare wire 220 is infinite, equivalent to an open circuit. The supply voltage VCC and ground cannot form a load circuit. Therefore, the voltage at the connection node between the first bare wire 210 and the first resistor R1 is the supply voltage VCC. When the seal of the air conditioner driver 100 ages or becomes detached, water or mist easily enters the air conditioner driver 100. When the environment in which the circuitry of the air conditioner driver 100 is located is humid, the electrolyte dissolved in the water or mist degrades the insulation between the first bare wire 210 and the second bare wire 220, reducing the resistance. The higher the humidity, the lower the resistance between the first bare wire 210 and the second bare wire 220. After voltage division with the first resistor R1, the voltage at the connection node between the first bare wire 210 and the first resistor R1 also decreases with increasing humidity, thereby indicating the humidity value of the environment in which the air conditioner driver 100 is located. The connection between the connection node between the first bare wire 210 and the first resistor R1 and the controller 110 allows the controller 110 to determine the humidity value of the environment in which the air conditioner driver 100 is located based on the voltage at the connection node between the first bare wire 210 and the first resistor R1. The humidity value of the environment in which the air conditioner driver 100 is located can determine the sealing performance of the air conditioner driver 100 and the insulation performance of the internal circuit of the air conditioner driver 100. To a certain extent, it can identify the possibility of failure of the air conditioner driver 100, so that users and manufacturers can promptly address it. This can reduce or even avoid leakage in the internal circuit of the air conditioner driver 100 due to poor insulation between internal components. In other words, the embodiments of the present application reduce safety issues caused by failure of the air conditioner driver 100.

[0053] like Figure 3 As shown, in some embodiments, in response to the humidity value in the environment where the air conditioner driver 100 is located exceeding a first alarm value, it is determined that the humidity has begun to change, and the controller 110 controls the internal memory to store the current humidity value and the current time. Otherwise, the humidity is determined to be normal. In response to the humidity value in the environment where the air conditioner driver 100 is located exceeding a second alarm value, which is greater than the first alarm value, it is determined to be slightly humid. The controller 110 also issues a warning signal via the communication module 140 to report the current humidity value to the vehicle system. In some examples, the communication module 140 may include a CAN transceiver. If the user observes this signal, preemptive repairs can be performed before a dangerous situation occurs, thereby reducing safety issues caused by failures of the air conditioner driver 100.

[0054] Please continue to see Figure 1In some embodiments, the drive circuit 130 may adopt a three-phase bridge circuit. The three-phase bridge circuit is composed of six switching devices (for example, insulated gate bipolar transistors (IGBTs)) forming three bridge arms, and each bridge arm controls one phase output. The controller 110 can control the conduction state of the six switching devices in the three-phase bridge circuit to convert the direct current of the driving power supply into three-phase alternating current (i.e., driving voltage). The three-phase alternating current can be applied to the stator of the motor M, thereby generating a rotating magnetic field in the motor M, thereby driving the rotor of the motor M to rotate. In addition, the controller 110 can also control the frequency of the three-phase alternating current to control the speed of the rotating magnetic field, and then control the speed of the stator of the motor M to achieve speed regulation of the motor M.

[0055] Please continue to see Figure 3 In some embodiments, in response to the humidity value of the environment in which the air-conditioning driver 100 is located being greater than the third alarm value, and the third alarm value being greater than the second alarm value, it is determined to be moderately humid. At this time, the controller 110 also outputs a signal to the switch circuit 150 instructing the drive circuit 130 to disconnect from the drive power supply to ensure the safety of the vehicle and related personnel.

[0056] In some embodiments, the controller 110 controls the connection between the driving circuit 130 and the driving power supply by controlling the conduction of the switch circuit 150; and controls the disconnection between the driving circuit 130 and the driving power supply by controlling the shutoff of the switch circuit 150. Figure 1 In some examples, the switch circuit 150 includes a relay K, a switch Q, and a diode D. One end of the switch of relay K is connected to the drive circuit 130, and the other end of the switch of relay K is connected to a drive power supply. A first end of the coil of relay K receives a power supply voltage VCC, a second end of the coil of relay K is connected to a first controlled end of the switch Q, a second controlled end of the switch Q is grounded GND, and a control end of the switch Q is connected to the controller 110.

[0057] For example, when the humidity in the environment of the air conditioner driver 100 is less than a third alarm value, the controller 110 controls the switch Q to conduct, energizing the coil of relay K to generate a magnetic field, causing the switch of relay K to close and allowing the drive current to connect to the drive power supply. When the humidity in the environment of the air conditioner driver 100 is greater than the third alarm value, the controller 110 controls the switch Q to turn off, de-energizing the coil of relay K and eliminating the magnetic field. This causes the switch of relay K to open again, disconnecting the drive current from the drive power supply. In other words, the controller 110 outputs a signal to the switch circuit 150 indicating that the drive circuit 130 is disconnected from the drive power supply, i.e., a signal controlling the switch Q to turn off.

[0058] Please continue to refer to Figure 1 The anode end of the diode D is connected to the first end of the coil of the relay K, and the cathode end of the diode D is connected to the second end of the coil of the relay K. In the embodiment of the present application, the diode D is provided to suppress the current spike generated when the switch tube Q is turned on and off, thereby protecting the coil of the relay K.

[0059] Please continue to see Figure 3 In some embodiments, in response to the humidity value of the environment where the air-conditioning driver 100 is located being greater than the fourth alarm value, and the fourth alarm value being greater than the third alarm value, it is determined to be severely humid. The controller 110 also locks its own state through a program and stops working (turning off all control outputs and signal reception processing), unless the air-conditioning driver 100 is replaced or manually unlocked, to avoid safety problems that may be caused by human misoperation.

[0060] It should be understood that when the controller 110 determines that the humidity value of the environment in which the air conditioner driver 100 is located is less than or equal to a certain alarm value, the controller 110 determines the magnitude relationship between the humidity value and the previous alarm value that is less than the alarm value. For example, when the controller 110 determines that the humidity value of the environment in which the air conditioner driver 100 is located is less than or equal to the fourth alarm value, the controller 110 determines the magnitude relationship between the humidity value and the third alarm value that is less than the fourth alarm value.

[0061] like Figure 4 As shown, the air conditioner driver 100 further includes a leakage current detection circuit 170, which includes a positive current detection circuit 171 and a negative current detection circuit 172. The positive electrode HV+ of the driving power supply is connected to the driving circuit 130 via the positive current detection circuit 171, and the negative electrode HV- of the driving power supply is connected to the driving circuit 130 via the negative current detection circuit 172. The positive current detection circuit 171 is also connected to the controller 110 for outputting a positive detection current to the controller 110; the negative current detection circuit 172 is also connected to the controller 110 for outputting a negative detection current to the controller 110.

[0062] In some examples, the positive current detection circuit 171 includes a Hall current sensor H, and the positive electrode HV+ of the driving power supply is connected to the driving circuit 130 through the Hall current sensor H, and the Hall current sensor H is also connected to the controller 110. The Hall current sensor H can withstand high voltage and has a long service life even under the high voltage of the positive electrode HV+ of the driving power supply. In some examples, the negative current detection circuit 172 includes a third resistor R3 and an operational amplifier A, and the negative electrode HV- of the driving power supply is connected to the driving circuit 130 through the third resistor R3, the first input terminal of the operational amplifier A is connected to the first end of the third resistor R3, the second input terminal A of the operational amplifier is connected to the second end of the third resistor R3, and the output terminal A of the operational amplifier is connected to the controller 110. The negative electrode HV- of the driving power supply is grounded GND, and the structure of detecting current through the third resistor R3 and the operational amplifier is simple and occupies a small area.

[0063] Since the positive current and the negative current are equal in the load current loop, if there is a deviation between the positive current and the negative current, it means that part of the current flows back to the drive power supply through other circuits (such as the shell). Figure 5 As shown, in the implementation mode of the present application, the controller 110 can determine the leakage current value based on the difference between the positive detection current and the negative detection current. When the leakage current value is greater than the leakage alarm value, it can be determined that a leakage problem has occurred; otherwise, it can be determined that no leakage has occurred.

[0064] In the event of leakage, the controller 110 controls the drive circuit 130 to output a drive voltage, starts the motor M connected to the drive circuit 130, and determines the startup leakage current value at that time. Furthermore, the controller 110 controls the drive circuit 130 to stop outputting the drive voltage, stops the motor M connected to the drive circuit 130, and determines the shutdown leakage current value at that time. If the startup leakage current value is greater than or equal to the shutdown leakage current value, the controller 110 determines that the motor M connected to the drive circuit 130 is leaking. If the startup leakage current value is less than the shutdown leakage current value, the controller 110 determines that the air conditioner driver 100 is leaking. This facilitates manufacturers to pinpoint the location of the leakage, helping to reduce repair time and improve user experience.

[0065] like Figure 6 As shown, in some embodiments, in response to a leakage current value exceeding a first leakage alarm value, the controller 110 controls internal memory to store the leakage current value and the current time, and issues a leakage warning signal via the communication module 140. The leakage warning signal indicates the leakage and its location. If a user observes this signal, they can initiate repairs before a dangerous situation occurs, thereby reducing safety issues caused by malfunctions in the air conditioner driver 100.

[0066] In response to the leakage current being greater than the second leakage alarm value, which is also greater than the first leakage alarm value, controller 110 outputs a signal instructing drive circuit 130 to disconnect from the drive power supply and, through a program, locks itself into a state and ceases operation (disabling all control outputs and signal processing) to avoid safety issues caused by human error. Conversely, when controller 110 determines that the leakage current is less than or equal to the second leakage alarm value, it determines the magnitude relationship between the leakage current and the first leakage alarm value.

[0067] like Figure 7 As shown, an embodiment of the present application also provides an air conditioner driver 100. The air conditioner driver 100 includes a controller 110, a drive circuit 130, and a leakage current detection circuit 170. The drive circuit 130 is used to connect to a drive power supply, and the controller 110 is connected to the drive circuit 130. The controller 110 is used to control the drive voltage output by the drive circuit 130. The controller 110 is also connected to the leakage current detection circuit 170. The leakage current detection circuit 170 includes a positive current detection circuit 171 and a negative current detection circuit 172. The positive electrode HV+ of the drive power supply is connected to the drive circuit 130 through the positive current detection circuit 171, and the negative electrode HV- of the drive power supply is connected to the drive circuit 130 through the negative current detection circuit 172. The positive current detection circuit 171 is also connected to the controller 110 for outputting a positive detection current to the controller 110. The negative current detection circuit 172 is also connected to the controller 110 for outputting a negative detection current to the controller 110.

[0068] The controller 110 can determine the leakage current value based on the difference between the positive detection current and the negative detection current, and implement the following according to the leakage current value: Figure 5 and Figure 6 The control logic shown has been described in the relevant part above and will not be repeated here in this application.

[0069] The embodiment of the present application also provides an air conditioning system. Figure 8 As shown, the air conditioning system includes an integrated valve 300, a heating element 400, a heat exchanger 500 and multiple motors 600 and Figure 1 、 Figure 4 and Figure 7The air-conditioning driver 100 of any one of the items, the integrated valve 300, the heating element 400, the heat exchanger 500 and the multiple motors 600 are all connected to the air-conditioning driver 100, and the air-conditioning driver 100 is used to control the integrated valve 300, the heating element 400, the heat exchanger 500 and the multiple motors 600. Among them, the multiple motors 600 include a compressor motor, a water pump motor 0 and a fan motor. In other words, the air-conditioning driver 100 can control multiple modules such as the compressor, the heating element 400 (for example, a PTC heating element), the water pump, the fan, the heat exchanger 500 (for example, a plate heat exchanger). The control is centralized in one controller 110, which reduces problems such as delays, and also reduces problems such as poor line contact, aging, etc. that cause components to malfunction or signal confusion.

[0070] In some examples, the integrated valve 300 integrates a solenoid valve, an electronic expansion valve, and a pressure sensor, and is connected to the air conditioner driver 100 in a molded-in manner. This reduces wiring and connector connections, saves space, and reduces usage errors.

[0071] The embodiment of the present application further provides a vehicle, which includes a frame and Figure 8 The air conditioning system shown is located inside the vehicle frame.

[0072] In the several embodiments provided in this application, it should be understood that the disclosed air conditioning driver, air conditioning system, and vehicle can be implemented in other ways. For example, the device embodiments described above are merely illustrative. For example, the division of the modules is merely a logical function division. In actual implementation, there may be other division methods, such as multiple modules or components can be combined or integrated into another device, or some features can be ignored or not executed. In addition, the mutual coupling or direct coupling or communication connection shown or discussed can be through some interface, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical, or other forms.

[0073] In addition, the functional modules in the various embodiments of the present application may be integrated into one device, or each module may exist physically separately, or two or more modules may be integrated into one device.

[0074] In the above embodiments, all or part of the embodiments may be implemented by software, hardware, firmware, or any combination thereof. When implemented by software programs, all or part of the embodiments may be implemented in the form of computer program products.

[0075] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of this application. Therefore, the scope of protection of this application should be based on the scope of protection of the claims.

Claims

1. An air conditioner driver (100), characterized in that: The device comprises a controller (110) and a humidity detection circuit (120); the humidity detection circuit (120) comprises a first bare wire (210), a second bare wire (220) and a first resistor; The first bare wire (210) and the second bare wire (220) are adjacent to and spaced apart from each other, the first bare wire (210) is connected to a first end of the first resistor, the second end of the first resistor is used to receive a power supply voltage, and the second bare wire (220) is grounded; The connection node between the first bare wire (210) and the first resistor is connected to the controller (110), and the voltage at the connection node between the first bare wire (210) and the first resistor is used to indicate the humidity value of the environment in which the air-conditioning driver (100) is located.

2. The air conditioner driver (100) according to claim 1, characterized in that The first bare wire (210) comprises a first connecting portion (211) and a plurality of first extending portions (212), wherein the plurality of first extending portions (212) are arranged at intervals, and one end of each of the plurality of first extending portions (212) is connected to the first connecting portion (211); The second bare wire (220) comprises a second connecting portion (221) and a plurality of second extending portions (222), the plurality of second extending portions (222) are arranged at intervals, and one end of the plurality of second extending portions (222) is connected via the second connecting portion (221); The first extension portions (212) and the second extension portions (222) are alternately arranged along a first direction, and the first direction is an arrangement direction of the plurality of first extension portions (212).

3. The air conditioner driver (100) according to claim 2, characterized in that The first bare wire (210) and the second bare wire (220) are both arranged on a blank position of the printed circuit board of the air conditioner driver (100).

4. The air conditioner driver (100) according to claim 1, characterized in that The humidity detection circuit (120) further includes a filtering subcircuit (121), and a connection node between the first bare wire (210) and the first resistor is connected to the controller (110) via the filtering subcircuit (121).

5. The air conditioner driver (100) according to claim 4, characterized in that The filtering subcircuit (121) includes a second resistor and a first capacitor, and a connection node between the first bare wire (210) and the first resistor is connected to a first end of the second resistor; The second end of the second resistor is connected to the controller (110) and the first end of the first capacitor respectively, and the second end of the first capacitor is grounded.

6. The air conditioner driver (100) according to any one of claims 1 to 5, characterized in that: The controller (110) is configured to: The humidity value of the environment where the air-conditioning driver (100) is located is determined according to the voltage of the connection node between the first bare wire (210) and the first resistor.

7. The air conditioner driver (100) according to claim 6, characterized in that The system further comprises a communication module (140), the controller (110) being connected to the communication module (140), and the controller (110) being configured to: In response to the humidity value of the environment in which the air-conditioning driver (100) is located being greater than a first alarm value, controlling the memory of the air-conditioning driver to store the current humidity value and the current time; In response to the humidity value of the environment where the air-conditioning driver (100) is located being greater than a second alarm value, a warning signal is also sent through the communication module (140) to report the current humidity value; the second alarm value is greater than the first alarm value.

8. The air conditioner driver (100) according to claim 7, characterized in that The device further comprises a driving circuit (130), the driving circuit (130) being used to connect to a driving power supply, the controller (110) being further connected to the driving circuit (130), the controller (110) being used to control the driving voltage output by the driving circuit (130); the controller (110) being configured to: In response to the humidity value of the environment where the air conditioner driver (100) is located being greater than a third alarm value, a signal is outputted to instruct the driver circuit (130) to disconnect from the driver power supply, the third alarm value being greater than the second alarm value.

9. The air conditioner driver (100) according to claim 8, characterized in that The controller (110) is configured to stop working in response to the humidity value of the environment where the air-conditioning driver (100) is located being greater than a fourth alarm value, wherein the fourth alarm value is greater than the third alarm value.

10. The air conditioner driver (100) according to claim 1, characterized in that The device further comprises a driving circuit (130) and a leakage current detection circuit (170), wherein the driving circuit (130) is used to connect to a driving power supply, the controller (110) is also connected to the driving circuit (130), and the controller (110) is used to control the driving voltage output by the driving circuit (130); the leakage current detection circuit (170) comprises a positive current detection circuit (171) and a negative current detection circuit (172); The positive electrode of the driving power supply is connected to the driving circuit (130) via the positive current detection circuit (171), and the negative electrode of the driving power supply is connected to the driving circuit (130) via the negative current detection circuit (172); The positive electrode current detection circuit (171) is also connected to the controller (110) and is used to output a positive electrode detection current to the controller (110); The negative electrode current detection circuit (172) is also connected to the controller (110) and is used to output a negative electrode detection current to the controller (110).

11. The air conditioner driver (100) according to claim 10, characterized in that The positive current detection circuit (171) includes a Hall current sensor, the positive electrode of the driving power supply is connected to the driving circuit (130) via the Hall current sensor, and the Hall current sensor is also connected to the controller (110).

12. The air conditioner driver (100) according to claim 10, characterized in that The negative electrode current detection circuit (172) includes a third resistor and an operational amplifier, the negative electrode of the driving power supply is connected to the driving circuit (130) through the third resistor, the first input end of the operational amplifier is connected to the first end of the third resistor, the second input end of the operational amplifier is connected to the second end of the third resistor, and the output end of the operational amplifier is connected to the controller (110).

13. The air conditioner driver (100) according to any one of claims 10-12, characterized in that: The controller (110) is further configured to: determining a leakage current value based on a difference between the positive electrode detection current and the negative electrode detection current; When the leakage current value is greater than the leakage alarm value, it is determined that leakage occurs.

14. The air conditioner driver (100) according to claim 13, characterized in that The controller (110) is further configured to: In the event of leakage, the drive circuit (130) is controlled to output the drive voltage, thereby controlling the motor connected to the drive circuit (130) to start, and determining a starting leakage current value; as well as, By controlling the drive circuit (130) to stop outputting the drive voltage, the motor connected to the drive circuit (130) is controlled to stop, and a shutdown leakage current value is determined; In response to the startup leakage current value being greater than or equal to the shutdown leakage current value, determining that a motor connected to the drive circuit (130) is leaking; In response to the startup leakage current value being less than the shutdown leakage current value, it is determined that the air conditioner driver (100) is leaking.

15. The air conditioner driver (100) according to claim 13, characterized in that The controller (110) is further configured to: In response to the leakage current value being greater than a first leakage alarm value, the internal memory is controlled to store the leakage current value and the current time, and a leakage warning signal is sent through a communication module (140), wherein the leakage warning signal is used to indicate the occurrence of leakage and the location of the leakage.

16. The air conditioner driver (100) according to claim 15, characterized in that The controller (110) is further configured to: In response to the leakage current value being greater than a second leakage alarm value, a signal is outputted to instruct the drive circuit (130) to disconnect from the drive power supply and stop working; wherein the second leakage alarm value is greater than the first leakage alarm value.

17. The air conditioner driver (100) according to claim 8 or 10, characterized in that: It also includes a switch circuit (150), one end of the switch circuit (150) is connected to the drive circuit (130), and the other end of the switch circuit (150) is used to connect to the drive power supply; The controller (110) is also connected to the switch circuit (150). The controller (110) controls the drive circuit (130) to be connected to the drive power supply by controlling the switch circuit (150) to be turned on; or controls the drive circuit (130) to be disconnected from the drive power supply by controlling the switch circuit (150) to be turned off.

18. The air conditioner driver (100) according to claim 17, characterized in that The switch circuit (150) includes a relay, a switch tube and a diode; wherein, One end of the relay switch is connected to the drive circuit (130), and the other end of the relay switch is used to connect to the drive power supply; The first end of the coil of the relay is used to receive a power supply voltage, the second end of the coil of the relay is connected to the first controlled end of the switch tube, the second controlled end of the switch tube is grounded, and the control end of the switch tube is connected to the controller (110); An anode terminal of the diode is connected to a first end of the coil of the relay, and a cathode terminal of the diode is connected to a second end of the coil of the relay.

19. An air conditioner driver (100), characterized in that: The invention comprises a controller (110), a driving circuit (130) and a leakage current detection circuit (170); the driving circuit (130) is used to connect to a driving power supply, the controller (110) is connected to the driving circuit (130), and the controller (110) is used to control the driving voltage output by the driving circuit (130); The controller (110) is also connected to the leakage current detection circuit (170); wherein the leakage current detection circuit (170) includes a positive current detection circuit (171) and a negative current detection circuit (172); The positive electrode of the driving power supply is connected to the driving circuit (130) via the positive current detection circuit (171), and the negative electrode of the driving power supply is connected to the driving circuit (130) via the negative current detection circuit (172); The positive electrode current detection circuit (171) is also connected to the controller (110) and is used to output a positive electrode detection current to the controller (110); The negative electrode current detection circuit (172) is also connected to the controller (110) and is used to output a negative electrode detection current to the controller (110).

20. The air conditioner driver (100) according to claim 19, characterized in that The controller (110) is further configured to: determining a leakage current value based on a difference between the positive electrode detection current and the negative electrode detection current; When the leakage current value is greater than the leakage alarm value, it is determined that leakage occurs.

21. The air conditioner driver (100) according to claim 20, characterized in that The controller (110) is further configured to: In the event of leakage, the drive circuit (130) is controlled to output the drive voltage, thereby controlling the motor connected to the drive circuit (130) to start, and determining a starting leakage current value; as well as, By controlling the drive circuit (130) to stop outputting the drive voltage, the motor connected to the drive circuit (130) is controlled to stop, and a shutdown leakage current value is determined; In response to the startup leakage current value being greater than or equal to the shutdown leakage current value, determining that a motor connected to the drive circuit (130) is leaking; In response to the startup leakage current value being less than the shutdown leakage current value, it is determined that the air conditioner driver (100) is leaking.

22. The air conditioner driver (100) according to claim 20, characterized in that The controller (110) is further configured to: In response to the leakage current value being greater than a first leakage alarm value, the internal memory is controlled to store the leakage current value and the current time, and a leakage warning signal is sent through a communication module (140), wherein the leakage warning signal is used to indicate the occurrence of leakage and the location of the leakage.

23. The air conditioner driver (100) according to claim 22, characterized in that The controller (110) is further configured to: In response to the leakage current value being greater than a second leakage alarm value, a signal is outputted to instruct the drive circuit (130) to disconnect from the drive power supply and stop working; wherein the second leakage alarm value is greater than the first leakage alarm value.

24. An air conditioning system, characterized in that: The invention comprises a plurality of motors (600) and an air-conditioning driver (100) according to any one of claims 1 to 23, wherein the plurality of motors (600) are connected to the air-conditioning driver (100), and the air-conditioning driver (100) is used to control the plurality of motors (600).

25. The air conditioning system according to claim 24, characterized in that The plurality of motors (600) include a compressor motor, a water pump motor and a fan motor.

26. The air conditioning system according to claim 24, characterized in that The air conditioner further comprises an integrated valve (300), a heating element (400) and a heat exchanger (500), wherein the integrated valve (300), the heating element (400) and the heat exchanger (500) are all connected to the air conditioner driver (100), and the air conditioner driver (100) is used to control the integrated valve (300), the heating element (400) and the heat exchanger (500).

27. The air conditioning system according to claim 26, characterized in that The integrated valve (300) comprises a solenoid valve, an electronic expansion valve, and a pressure sensor, and the integrated valve (300) is connected to the air-conditioning driver (100).

28. A vehicle, characterized in that: The vehicle comprises a vehicle frame and the air-conditioning system according to any one of claims 24 to 27, wherein the air-conditioning system is arranged in the vehicle frame.

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