Control board, water heater, and driving method

Abstract

The present application relates to the technical field of control, and provides a control board, a water heater, and a driving method. The control board comprises: a main control module, a fan driving module, and a heat pump driving module. The fan driving module comprises a variable-frequency fan driving module and a fixed-frequency fan relay module, and the fan driving module is connected to the main control module and used for driving, on the basis of a control instruction of the main control module, a variable-frequency fan or a fixed-frequency fan to operate. The heat pump driving module comprises a variable-frequency heat pump driving module and a fixed-frequency heat pump relay module, and the heat pump driving module is connected to the main control module and used for driving, on the basis of a control instruction of the main control module, a variable-frequency heat pump or a fixed-frequency heat pump to operate. In the present application, according to actual requirements, the variable-frequency fan driving module or the fixed-frequency fan relay module can be selected, and combined with the variable-frequency heat pump driving module or the fixed-frequency heat pump relay module, a heat pump and a fan are driven, satisfying diversified driving requirements.

Description

Control panel, water heater and driving method

[0001] CROSS-REFERENCE TO RELATED APPLICATIONS

[0002] This application claims priority to Chinese Patent Application No. 202311538604.7, filed on November 17, 2023, entitled “Control Panel, Water Heater, and Driving Method”; Chinese Patent Application No. 202323112072.9, filed on November 17, 2023, entitled “Control Panel and Water Heater”; and Chinese Patent Application No. 202323112015, filed on November 17, 2023. 0, entitled “Control Panel and Water Heater”; the priority of the Chinese patent application with application number 202323138618.8 filed on November 17, 2023, entitled “Control Panel and Water Heater”; and the priority of the Chinese patent application with application number 202323138602.7 filed on November 17, 2023, entitled “Control Panel and Water Heater”, all of which are incorporated herein by reference. Technical Field

[0003] The present application relates to the technical field of household appliances, and in particular to a control panel, a water heater and a driving method. Background Art

[0004] A heat pump is a highly efficient, energy-saving device that transfers heat energy from low-grade heat sources to higher-grade heat sources. It typically extracts low-grade heat energy from natural sources like air, water, or soil, uses electricity to generate work, and then provides usable, high-grade heat energy. It consumes only a small amount of net reverse cycle work to produce a significant amount of heat. Therefore, it can effectively utilize otherwise untapped low-grade heat energy, achieving energy savings. It is widely used in agricultural irrigation, domestic water supply, and other fields.

[0005] In some mechanical equipment, heat pumps often need to be used in conjunction with fans. Traditionally, the heat pump (i.e., heat pump compressor) and fan are driven separately at specific drive frequencies. This single-minded approach cannot meet diverse drive needs.

[0006] Currently, for equipment using variable-frequency heat pumps, the variable-frequency heat pump driver module is installed inside the compressor. The compressor motor of a variable-frequency heat pump generates heat during operation. Furthermore, the variable-frequency heat pump driver module typically includes heat-generating components such as IGBTs (Insulated Gate Bipolar Transistors), MOSFETs (Metal-Oxide-Semiconductor Field-Effect Transistors), or IPMs (Intelligent Power Modules), which themselves generate heat. Heat generated within the compressor of the variable-frequency heat pump where the variable-frequency heat pump driver module is located, as well as heat generated by the driver module's own heat-generating components, can affect the normal operation of the module.

[0007] As an energy-saving and environmentally friendly water heater device, heat pump water heaters are favored by more and more consumers and have become one of the important choices for household and commercial hot water supply.

[0008] Summary of the Invention

[0009] This application aims to solve at least one of the technical problems existing in the related art. To this end, the embodiments of this application provide a control board that can select a variable frequency fan drive module or a fixed frequency fan relay module according to actual needs, and cooperate with the variable frequency heat pump drive module or the fixed frequency heat pump relay module to drive the heat pump and fan to meet diverse drive requirements.

[0010] The embodiment of the present application also proposes a control board, which can dispose the control board integrated with the variable frequency heat pump drive module outside the variable frequency heat pump, so that the variable frequency heat pump drive module is away from the heat source, thereby avoiding the impact of the internal environment heating of the variable frequency heat pump on the variable frequency heat pump drive module. At the same time, it also helps to dissipate the heat of the heating elements of the variable frequency heat pump drive module itself, thereby improving the stability of the operation of the variable frequency heat pump drive module.

[0011] The embodiment of the present application also proposes a control board that integrates the variable frequency fan drive module into the main control board, reducing the volume occupied by the variable frequency fan drive module, and only needs to fix the main control board, reducing the number of fixed structures and reducing costs.

[0012] An embodiment of the present application also proposes a control board, which can effectively reduce the volume of at least one of the fan and the heat pump by integrating at least one of the variable frequency fan drive module and the variable frequency heat pump drive module into the main control board, and can effectively reduce the heat dissipation cost.

[0013] The present application also provides a water heater and a driving method.

[0014] The control board provided in an embodiment of the present application includes:

[0015] Main control module, fan drive module and heat pump drive module;

[0016] The fan drive module includes a variable frequency fan drive module and a fixed frequency fan relay module, and the fan drive module is connected to the main control module and is used to drive the variable frequency fan or the fixed frequency fan to operate according to the control instructions of the main control module;

[0017] The heat pump drive module includes a variable frequency heat pump drive module and a fixed frequency heat pump relay module, and the heat pump drive module is connected to the main control module and is used to drive the variable frequency heat pump or the fixed frequency heat pump to operate according to the control instructions of the main control module.

[0018] According to the control board of the embodiment of the present application, it includes a main control module, a fan drive module and a heat pump drive module. The fan drive module includes a variable frequency fan drive module and a fixed frequency fan relay module, and the fan drive module is connected to the main control module, and is used to drive the variable frequency fan or the fixed frequency fan to operate according to the control instructions of the main control module. The heat pump drive module includes a variable frequency heat pump drive module and a fixed frequency heat pump relay module, and the heat pump drive module is connected to the main control module, and is used to drive the variable frequency heat pump or the fixed frequency heat pump to operate according to the control instructions of the main control module. Since the control board integrates the variable frequency fan drive module, the fixed frequency fan relay module, the variable frequency heat pump drive module and the fixed frequency heat pump relay module, the variable frequency fan drive module can be selected according to actual needs to drive the variable frequency fan and cooperate with the variable frequency heat pump drive module to drive the variable frequency heat pump, or the variable frequency fan drive module can be selected to drive the variable frequency fan and cooperate with the fixed frequency heat pump relay module to drive the fixed frequency heat pump, or the fixed frequency fan relay module can be selected to drive the fixed frequency fan and cooperate with the variable frequency heat pump drive module to drive the variable frequency heat pump, or the fixed frequency fan relay module can be selected to drive the fixed frequency fan and cooperate with the fixed frequency heat pump relay module to drive the fixed frequency heat pump. There are four optional driving modes to meet the needs of diversified driving.

[0019] Furthermore, since the traditional driving method is to set driving modules in the heat pump and the fan respectively to drive the heat pump and the fan, it is not conducive to the unified control and maintenance of the driving modules. The present application integrates the driving modules in the heat pump and the fan into the same control board, which facilitates the unified control of the driving modules by the same main control and is conducive to the unified maintenance of each driving module.

[0020] According to one embodiment of the present application, a control board is arranged outside the variable frequency fan, the variable frequency heat pump, the fixed frequency fan and the fixed frequency heat pump.

[0021] According to one embodiment of the present application, it further includes:

[0022] Variable frequency fan interface and variable frequency heat pump interface;

[0023] The variable frequency fan drive module is connected to the three-phase motor of the variable frequency fan through the variable frequency fan interface;

[0024] The variable frequency heat pump driving module is connected to the three-phase motor of the variable frequency heat pump through the variable frequency heat pump interface.

[0025] According to one embodiment of the present application, the variable frequency fan drive module and the main control module communicate with each other via a universal asynchronous receiver / transmitter, or a bidirectional two-wire synchronous serial bus, or a serial peripheral interface;

[0026] The variable frequency heat pump drive module communicates with the main control module via a universal asynchronous receiver / transmitter, or a bidirectional two-wire synchronous serial bus, or a serial peripheral interface.

[0027] According to one embodiment of the present application, it further includes:

[0028] Fixed frequency fan interface and fixed frequency heat pump interface;

[0029] The fixed-frequency fan relay module is connected to the fixed-frequency fan through the fixed-frequency fan interface;

[0030] The fixed-frequency heat pump relay module is connected to the fixed-frequency heat pump through the fixed-frequency heat pump interface.

[0031] According to one embodiment of the present application, it further includes:

[0032] A switching power supply module, a first optical coupling isolation module and a second optical coupling isolation module;

[0033] The variable frequency fan is a high-pressure variable frequency fan, and the variable frequency heat pump is a high-pressure variable frequency heat pump;

[0034] The first end of the switching power supply module is connected to the mains, the second end of the switching power supply module is isolated and connected to the main control module, and the third end of the switching power supply module is non-isolated and connected to the variable frequency fan drive module and the variable frequency heat pump drive module;

[0035] The first optical coupling isolation module is connected between the variable frequency fan drive module and the main control module;

[0036] The second optical coupling isolation module is connected between the variable frequency heat pump drive module and the main control module.

[0037] According to one embodiment of the present application, it further includes:

[0038] Switching power supply module;

[0039] The variable frequency fan is a low-voltage variable frequency fan, and the variable frequency heat pump is a low-voltage variable frequency heat pump;

[0040] The first end of the switching power supply module is connected to the mains, the second end of the switching power supply module is isolated and connected to the main control module, and the third end of the switching power supply module is isolated and connected to the variable frequency fan drive module and the variable frequency heat pump drive module.

[0041] According to one embodiment of the present application, it further includes:

[0042] Electronic anode drive module and electronic anode interface;

[0043] The first end of the electronic anode driving module is connected to the main control module, and the second end of the electronic anode driving module is connected to the electronic anode through the electronic anode interface.

[0044] According to one embodiment of the present application, it further includes:

[0045] Leakage detection module, current detection module, sensor drive module, high-voltage switch drive module, display panel communication module, sensor interface and high-voltage switch interface;

[0046] The leakage detection module is connected between the switching power supply module and the mains;

[0047] The current detection module is connected between the leakage detection module and the mains;

[0048] The first end of the sensor driving module is connected to the main control module, and the second end of the sensor driving module is connected to temperature sensors at different positions through the sensor interface;

[0049] The first end of the high-voltage switch driving module is connected to the main control module, and the second end of the high-voltage switch driving module is connected to the high-voltage switch through the high-voltage switch interface;

[0050] The first end of the display panel communication module is connected to the main control module, and the second end of the display panel communication module is connected to the display panel.

[0051] The water heater provided in accordance with an embodiment of the present application includes:

[0052] Variable frequency fan, fixed frequency fan, variable frequency heat pump, fixed frequency heat pump, electronic anode, temperature sensor, high voltage switch, display board and control board as described above.

[0053] The driving method provided in an embodiment of the present application includes:

[0054] Control the main control module to send variable frequency fan control signals to the variable frequency fan drive module;

[0055] Controlling the variable frequency fan drive module to amplify the variable frequency fan control signal to obtain a variable frequency fan amplified signal;

[0056] Controlling the variable frequency fan drive module to send the variable frequency fan amplified signal to the variable frequency fan;

[0057] Controlling the variable frequency fan to operate according to the variable frequency fan amplified signal; or

[0058] The control main control module sends a fixed-frequency fan control signal to the fixed-frequency fan relay module;

[0059] The fixed-frequency fan relay module is controlled to close according to the fixed-frequency fan control signal to drive the fixed-frequency fan to operate.

[0060] According to one embodiment of the present application, it further includes:

[0061] The control main control module sends a variable frequency heat pump control signal to the variable frequency heat pump drive module;

[0062] controlling the variable frequency heat pump driving module to amplify the variable frequency heat pump control signal to obtain a variable frequency heat pump amplified signal;

[0063] Controlling the variable frequency heat pump driving module to send the variable frequency heat pump amplified signal to the variable frequency heat pump;

[0064] controlling the variable frequency heat pump to operate according to the variable frequency heat pump amplified signal; or

[0065] The control main control module sends a fixed-frequency heat pump control signal to the fixed-frequency heat pump relay module;

[0066] The fixed-frequency heat pump relay module is controlled to close according to the fixed-frequency heat pump control signal to drive the fixed-frequency heat pump to operate.

[0067] The control board provided in an embodiment of the present application includes:

[0068] Main control module, fixed frequency fan relay module and variable frequency heat pump drive module;

[0069] The fixed-frequency fan relay module is connected to the main control module and is used to drive the fixed-frequency fan to operate according to the control instructions of the main control module;

[0070] The variable frequency heat pump driving module is connected to the main control module and is used to drive the variable frequency heat pump to operate according to the control instructions of the main control module;

[0071] The control panel is arranged outside the fixed-frequency fan and the variable-frequency heat pump.

[0072] According to the control board of the embodiment of the present application, it includes a main control module, a fixed-frequency fan relay module and a variable-frequency heat pump drive module. The fixed-frequency fan relay module is connected to the main control module and is used to drive the fixed-frequency fan to operate according to the control instructions of the main control module. The variable-frequency heat pump drive module is connected to the main control module and is used to drive the variable-frequency heat pump to operate according to the control instructions of the main control module. The control board is arranged outside the fixed-frequency fan and the variable-frequency heat pump. By arranging the control board with the integrated variable-frequency heat pump drive module outside the variable-frequency heat pump, the variable-frequency heat pump drive module is kept away from the heat source, thereby avoiding the influence of the internal environment heating of the variable-frequency heat pump on the variable-frequency heat pump drive module. At the same time, it also helps to dissipate the heat of the heating elements of the variable-frequency heat pump drive module itself, thereby improving the stability of the operation of the variable-frequency heat pump drive module.

[0073] Furthermore, since the traditional driving method uses measures such as setting up heat sinks to dissipate heat from the heating elements, which will increase the heat dissipation cost, the present application does not require the use of heat sinks, which can reduce the heat dissipation cost.

[0074] Furthermore, since the variable frequency heat pump drive module is usually integrated into the compressor motor of the variable frequency heat pump, the size of the compressor motor will be relatively large, which in turn leads to higher costs for the structural parts of the fixed motor. This application separates the variable frequency heat pump drive module from the compressor motor of the variable frequency heat pump, thereby reducing the height of the motor, reducing the size of the motor and the amount of motor body material used, which helps to reduce the motor fixing cost and the manufacturing cost of the motor itself.

[0075] Furthermore, since the traditional driving method is to set up driving modules in the heat pump and fan respectively to drive the heat pump and the fan, it is not conducive to the unified control and maintenance of the driving modules. The present application integrates the driving modules in the heat pump and the fan into the same control board, which facilitates the unified control of the driving modules by the same main control and is conducive to the unified maintenance of each driving module.

[0076] According to one embodiment of the present application, it further includes:

[0077] Variable frequency heat pump interface;

[0078] The variable frequency heat pump driving module is connected to the three-phase motor of the variable frequency heat pump through the variable frequency heat pump interface.

[0079] According to one embodiment of the present application, the variable frequency heat pump drive module communicates with the main control module via a universal asynchronous receiver / transmitter, or a bidirectional two-wire synchronous serial bus, or a serial peripheral interface.

[0080] According to one embodiment of the present application, it further includes:

[0081] Fixed frequency fan interface;

[0082] The fixed-frequency fan relay module is connected to the fixed-frequency fan through the fixed-frequency fan interface.

[0083] According to one embodiment of the present application, it further includes:

[0084] Switching power supply module and third optocoupler isolation module;

[0085] The variable frequency heat pump is a high-pressure variable frequency heat pump;

[0086] The first end of the switching power supply module is connected to the mains, the second end of the switching power supply module is isolated and connected to the main control module, and the third end of the switching power supply is non-isolated and connected to the variable frequency heat pump drive module;

[0087] The third optical coupling isolation module is connected between the variable frequency heat pump driving module and the main control module.

[0088] According to one embodiment of the present application, it further includes:

[0089] Switching power supply module;

[0090] The variable frequency heat pump is a low-voltage variable frequency heat pump;

[0091] The first end of the switching power supply module is connected to the mains, the second end of the switching power supply module is isolated and connected to the main control module, and the third end of the switching power supply is isolated and connected to the variable frequency heat pump drive module.

[0092] According to one embodiment of the present application, it further includes:

[0093] Electronic expansion valve drive module and electronic expansion valve interface;

[0094] A first end of the electronic expansion valve driving module is connected to the main control module, and a second end of the electronic expansion valve driving module is connected to the electronic expansion valve through the electronic expansion valve interface.

[0095] According to one embodiment of the present application, it further includes:

[0096] Leakage detection module, current detection module, sensor drive module, high-voltage switch drive module, display panel communication module, sensor interface and high-voltage switch interface;

[0097] The leakage detection module is connected between the switching power supply module and the mains;

[0098] The current detection module is connected between the leakage detection module and the mains;

[0099] The first end of the sensor driving module is connected to the main control module, and the second end of the sensor driving module is connected to temperature sensors at different positions through the sensor interface;

[0100] The first end of the high-voltage switch driving module is connected to the main control module, and the second end of the high-voltage switch driving module is connected to the high-voltage switch through the high-voltage switch interface;

[0101] The first end of the display panel communication module is connected to the main control module, and the second end of the display panel communication module is connected to the display panel.

[0102] The water heater provided according to an embodiment of the present application includes the control panel as described above.

[0103] According to one embodiment of the present application, the water heater further includes: a fixed-frequency fan, a variable-frequency heat pump, an electronic expansion valve, a temperature sensor, a high-voltage switch, and a display panel.

[0104] The control board provided in an embodiment of the present application includes:

[0105] A main control board, wherein the main control board is provided with a control module;

[0106] A variable frequency fan drive module is integrated into the main control board, wherein the input end of the variable frequency fan drive module is electrically connected to the first output end of the control module, and the output end of the variable frequency fan drive module is electrically connected to the variable frequency fan;

[0107] A fixed-frequency heat pump switch module, wherein the input end of the fixed-frequency heat pump switch module is electrically connected to the second output end of the control module, and the output end of the fixed-frequency heat pump switch module is electrically connected to the fixed-frequency heat pump.

[0108] According to the control board of the embodiment of the present application, the control module sends corresponding control signals to the variable frequency fan drive module and the fixed frequency heat pump switch module, so that the variable frequency fan drive module can drive the fan to work according to the target operating parameters, and the fixed frequency heat pump switch module can control the fixed frequency heat pump switch. The variable frequency fan drive module is integrated in the main control board, that is, the variable frequency fan drive module and the control module can share a board, and there is no need to set up a separate variable frequency fan control board, which can effectively reduce the volume occupied by the variable frequency fan drive module. Moreover, the main control board integrated with the variable frequency fan drive module is not installed in the variable frequency fan, that is, there is no variable frequency fan control board in the variable frequency fan, which can effectively reduce the volume of the variable frequency fan, reduce the materials required for the production of the variable frequency fan, and reduce the cost. In this case, only the main control board needs to be fixed, and there is no need to set up an additional fixed structure to fix the variable frequency fan drive module, which can effectively reduce the number of fixed structures and reduce costs.

[0109] According to one embodiment of the present application, the fixed-frequency heat pump switch module is integrated into the main control board.

[0110] According to one embodiment of the present application, the variable frequency fan drive module and the control module are communicatively connected via at least one of a serial interface uart, a bidirectional serial data transmission interface I2C, and a serial peripheral interface SPI.

[0111] According to one embodiment of the present application, the control board includes a variable frequency fan interface, which is integrated in the main control board. The variable frequency fan interface is used to connect the variable frequency fan drive module and the variable frequency fan.

[0112] According to one embodiment of the present application, the variable frequency fan interface includes a first U-phase interface, a first V-phase interface and a first W-phase interface, the first U-phase interface is used to connect the variable frequency fan drive module with the U-phase connection end of the variable frequency fan, the first V-phase interface is used to connect the variable frequency fan drive module with the V-phase connection end of the variable frequency fan, and the first W-phase interface is used to connect the variable frequency fan drive module with the W-phase interface of the variable frequency fan.

[0113] According to one embodiment of the present application, the control board includes a fixed-frequency heat pump interface, which is integrated into the main control board and is used to connect the fixed-frequency heat pump switch module and the fixed-frequency heat pump.

[0114] According to one embodiment of the present application, the control board includes a fourth optocoupler isolation module, and the fourth optocoupler isolation module is arranged between the variable frequency fan drive module and the control module.

[0115] According to one embodiment of the present application, the control board includes a PV module, the PV module is integrated with the main control board, and the PV module is used to connect the control module and the power grid.

[0116] According to the water heater provided in the embodiment of the present application, it includes a variable frequency fan, a fixed frequency heat pump and the above-mentioned control board, the variable frequency fan is electrically connected to the variable frequency fan drive module, and the fixed frequency heat pump is electrically connected to the fixed frequency heat pump switch module.

[0117] The water heater according to the present application has a control panel, and thus has all the beneficial effects of the control panel, which will not be described again here.

[0118] According to one embodiment of the present application, the control panel is arranged in a space outside the variable frequency fan, and the control panel is arranged in a space outside the fixed frequency heat pump; and / or,

[0119] The fixed-frequency heat pump switch module is arranged in a space outside the variable-frequency fan, and the fixed-frequency heat pump switch module is arranged in a space outside the fixed-frequency heat pump.

[0120] The control board provided in an embodiment of the present application includes:

[0121] A main control board, wherein the main control board is provided with a control module;

[0122] A variable frequency fan drive module, wherein the input end of the variable frequency fan drive module is electrically connected to the first output end of the control module, and the output end of the variable frequency fan drive module is electrically connected to the variable frequency fan;

[0123] A variable frequency heat pump drive module, wherein the input end of the variable frequency heat pump drive module is electrically connected to the second output end of the control module, and the output end of the variable frequency heat pump drive module is electrically connected to the variable frequency heat pump;

[0124] At least one of the variable frequency fan drive module and the variable frequency heat pump drive module is integrated into the main control board.

[0125] According to the control board of the embodiment of the present application, the control module sends corresponding control signals to the variable frequency fan drive module and the variable frequency heat pump drive module, so that the variable frequency fan drive module can drive the fan to operate according to target operating parameters, and the variable frequency heat pump drive module can drive the variable frequency heat pump to operate according to target operating parameters. At least one of the variable frequency fan drive module and the variable frequency heat pump drive module is integrated into the main control board, that is, the variable frequency fan drive module, the variable frequency heat pump drive module, and the control module can share a single board, eliminating the need for a separate variable frequency fan control board or variable frequency heat pump control board, thereby effectively reducing the volume occupied by the variable frequency fan drive module and the variable frequency heat pump drive module. Furthermore, the main control board with the integrated variable frequency fan drive module and the variable frequency heat pump drive module is not installed in the variable frequency fan or the variable frequency heat pump, that is, there is no variable frequency fan control board in the variable frequency fan, and there is no variable frequency heat pump control board in the variable frequency heat pump, thereby effectively reducing the volume of the variable frequency fan and the variable frequency heat pump. The variable frequency fan drive module and the variable frequency heat pump drive module are integrated into the main control board, so that the heat dissipation of the variable frequency fan drive module and the heat dissipation of the variable frequency fan will not affect each other, and the heat dissipation of the variable frequency heat pump drive module and the heat dissipation of the variable frequency heat pump will not affect each other, thereby improving the heat dissipation effect, effectively reducing the heat dissipation structure, and reducing the heat dissipation cost.

[0126] According to one embodiment of the present application, at least one of the variable frequency fan drive module and the variable frequency heat pump switch module is communicatively connected to the control module through at least one of the serial interface uart or the bidirectional serial data transmission interface I2C or the serial peripheral interface SPI.

[0127] According to one embodiment of the present application, the control board includes a variable frequency heat pump interface, which is integrated into the main control board and is used to connect the variable frequency heat pump drive module and the variable frequency heat pump.

[0128] According to one embodiment of the present application, the variable frequency heat pump interface includes a second U-phase interface, a second V-phase interface and a second W-phase interface, the second U-phase interface is used to connect the variable frequency heat pump drive module with the U-phase connection end of the variable frequency heat pump, the second V-phase interface is used to connect the variable frequency heat pump drive module with the V-phase connection end of the variable frequency heat pump, and the second W-phase interface is used to connect the variable frequency heat pump drive module with the W-phase interface of the variable frequency heat pump.

[0129] According to one embodiment of the present application, the control board includes a variable frequency fan interface, which is integrated in the main control board. The variable frequency fan interface is used to connect the variable frequency fan drive module and the variable frequency fan.

[0130] According to one embodiment of the present application, the variable frequency fan interface includes a third U-phase interface, a third V-phase interface and a third W-phase interface, the third U-phase interface is used to connect the variable frequency fan drive module with the U-phase connection end of the variable frequency fan, the third V-phase interface is used to connect the variable frequency fan drive module with the V-phase connection end of the variable frequency fan, and the third W-phase interface is used to connect the variable frequency fan drive module with the W-phase interface of the variable frequency fan.

[0131] According to one embodiment of the present application, the control board includes:

[0132] A high-voltage switch module, the high-voltage switch module is integrated into the main control board, the input end of the high-voltage switch module is electrically connected to the control module, the output end of the high-voltage switch module is used to be electrically connected to the high-voltage switch, and the high-voltage switch module is used to detect the pressure at the high-voltage switch; and / or,

[0133] A fifth optocoupler isolation module and a sixth optocoupler isolation module, wherein the fifth optocoupler isolation module is arranged between the variable frequency heat pump drive module and the control module, and the sixth optocoupler isolation module is arranged between the variable frequency fan drive module and the control module.

[0134] According to one embodiment of the present application, the control board includes a heater module, which is integrated into the main control board. The input end of the heater module is electrically connected to the control module, and the output end of the heater module is electrically connected to the heater.

[0135] According to the water heater provided in the embodiment of the present application, it includes a variable frequency fan, a variable frequency heat pump and the above-mentioned control board, the variable frequency fan is electrically connected to the variable frequency fan drive module, and the variable frequency heat pump is electrically connected to the variable frequency heat pump drive module.

[0136] The water heater according to the present application has a control panel, and thus has all the beneficial effects of the control panel, which will not be described again here.

[0137] According to one embodiment of the present application, a first distance is set between the control board and the variable frequency fan, and a second distance is set between the control board and the variable frequency heat pump.

[0138] The above one or more technical solutions in the embodiments of the present application have at least one of the following technical effects:

[0139] The control panel of the present application includes a main control module, a fan drive module and a heat pump drive module. The fan drive module includes a variable frequency fan drive module and a fixed frequency fan relay module, and the fan drive module is connected to the main control module, and is used to drive the variable frequency fan or the fixed frequency fan to operate according to the control instructions of the main control module. The heat pump drive module includes a variable frequency heat pump drive module and a fixed frequency heat pump relay module, and the heat pump drive module is connected to the main control module, and is used to drive the variable frequency heat pump or the fixed frequency heat pump to operate according to the control instructions of the main control module. Since the control board integrates the variable frequency fan drive module, the fixed frequency fan relay module, the variable frequency heat pump drive module and the fixed frequency heat pump relay module, the variable frequency fan drive module can be selected according to actual needs to drive the variable frequency fan and cooperate with the variable frequency heat pump drive module to drive the variable frequency heat pump, or the variable frequency fan drive module can be selected to drive the variable frequency fan and cooperate with the fixed frequency heat pump relay module to drive the fixed frequency heat pump, or the fixed frequency fan relay module can be selected to drive the fixed frequency fan and cooperate with the variable frequency heat pump drive module to drive the variable frequency heat pump, or the fixed frequency fan relay module can be selected to drive the fixed frequency fan and cooperate with the fixed frequency heat pump relay module to drive the fixed frequency heat pump. There are four optional driving modes to meet the needs of diversified driving.

[0140] The control panel of the present application includes a main control module, a fixed-frequency fan relay module and a variable-frequency heat pump drive module. The fixed-frequency fan relay module is connected to the main control module and is used to drive the fixed-frequency fan to operate according to the control instructions of the main control module. The variable-frequency heat pump drive module is connected to the main control module and is used to drive the variable-frequency heat pump to operate according to the control instructions of the main control module. The control panel is arranged outside the fixed-frequency fan and the variable-frequency heat pump. By arranging the control panel with the integrated variable-frequency heat pump drive module outside the variable-frequency heat pump, the variable-frequency heat pump drive module is kept away from the heat source, thereby avoiding the influence of the internal environment heating of the variable-frequency heat pump on the variable-frequency heat pump drive module. At the same time, it also helps to dissipate the heat of the heating elements of the variable-frequency heat pump drive module itself, thereby improving the stability of the operation of the variable-frequency heat pump drive module.

[0141] Furthermore, since the traditional driving method uses measures such as setting up heat sinks to dissipate heat from the heating elements, which will increase the heat dissipation cost, the present application does not require the use of heat sinks, which can reduce the heat dissipation cost.

[0142] Furthermore, since the variable frequency heat pump drive module is usually integrated into the compressor motor of the variable frequency heat pump, the size of the compressor motor will be relatively large, which in turn leads to higher costs for the structural parts of the fixed motor. This application separates the variable frequency heat pump drive module from the compressor motor of the variable frequency heat pump, thereby reducing the height of the motor, reducing the size of the motor and the amount of motor body material used, which helps to reduce the motor fixing cost and the manufacturing cost of the motor itself.

[0143] Furthermore, since the traditional driving method is to set up driving modules in the heat pump and fan respectively to drive the heat pump and the fan, it is not conducive to the unified control and maintenance of the driving modules. The present application integrates the driving modules in the heat pump and the fan into the same control board, which facilitates the unified control of the driving modules by the same main control and is conducive to the unified maintenance of each driving module.

[0144] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become obvious from the description below, or will be learned through practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0145] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the following briefly introduces the drawings required for use in the embodiments or related technical descriptions. 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 paying any creative work.

[0146] FIG1 is a circuit diagram of a control board provided in an embodiment of the present application;

[0147] FIG2 is a circuit diagram of a control board provided in an embodiment of the present application;

[0148] FIG3 is a schematic structural diagram of a control panel provided in an embodiment of the present application;

[0149] FIG4 is a schematic diagram of the structure of a control board provided in an embodiment of the present application, in which a variable frequency fan and a fixed frequency heat pump are connected;

[0150] FIG5 is a schematic structural diagram of a control board provided in an embodiment of the present application;

[0151] FIG6 is a schematic structural diagram of a control panel provided in an embodiment of the present application, in which a variable frequency fan and a variable frequency heat pump are connected.

[0152] Figure 1: Electronic anode interface; 2: High-voltage switch interface; 3: Variable-frequency fan interface; 4: Variable-frequency heat pump interface; 5: Fixed-frequency fan interface; 6: Fixed-frequency heat pump interface; 7: Sensor interface; 8: First optocoupler isolation module; 9: Second optocoupler isolation module; 10: Current detection module; 11: First position temperature sensor; 12: Second position temperature sensor; 2-1: High-voltage switch interface; 2-2: Electronic expansion valve interface; 2-3: Variable-frequency heat pump interface; 2-4: Fixed-frequency fan interface; 2-5: Sensor interface; 2-6: Third optocoupler isolation module; 2-7: Current detection module; 2-8: Third position temperature sensor; 2-9: Fourth position temperature sensor; 4-1. Main control board; 4-2. Variable frequency fan drive module; 4-3. Variable frequency fan; 4-4. Fixed frequency heat pump switch module; 4-5. Fixed frequency heat pump; 4-6. Fourth optocoupler isolation module; 4-7. PV module; 4-11. Control module; 4-31. Variable frequency fan interface; 4-51. Fixed frequency heat pump interface; 6-1. Main control board; 6-2. Variable frequency fan drive module; 6-3. Variable frequency fan; 6-4. Variable frequency heat pump drive module; 6-5. Variable frequency heat pump; 6-6. High-voltage switch module; 6-7. Fifth optocoupler isolation module; 6-8. Sixth optocoupler isolation module; 6-9. Heater module; 6-11. Control module; 6-31. Variable frequency fan interface; 6-51. Variable frequency heat pump interface. DETAILED DESCRIPTION

[0153] The following embodiments of the present invention are described in further detail with reference to the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0154] In the description of the embodiments of the present application, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the embodiments of the present application. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0155] In the description of the embodiments of this application, it should be noted that, unless otherwise specified or limited, the terms "connected" and "connection" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium. Those skilled in the art will understand the specific meanings of the above terms in the embodiments of this application based on the specific circumstances.

[0156] In the embodiments of the present application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Furthermore, a first feature being "above," "above," and "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0157] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiments of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art can combine and combine different embodiments or examples described in this specification and the features of different embodiments or examples, unless they are contradictory.

[0158] The inventors found that the heat pump water heaters in the related art are provided with a heat pump control panel and a fan control panel. The heat pump control panel and the fan control panel occupy a certain volume and require a fixed structure to fix the heat pump control panel and the fan control panel, which is costly. The heat pump control panel is usually installed in the heat pump and the fan control panel is installed in the fan, resulting in a larger volume of the heat pump and the fan, and a higher heat dissipation cost.

[0159] FIG1 is a circuit diagram of a control board provided in an embodiment of the present application. Referring to FIG1 , an embodiment of the present application provides a control board, comprising:

[0160] Main control module;

[0161] The fan drive module includes a variable frequency fan drive module and a fixed frequency fan relay module, and the fan drive module is connected to the main control module and is used to drive the variable frequency fan or the fixed frequency fan to operate according to the control instructions of the main control module;

[0162] The heat pump drive module includes a variable frequency heat pump drive module and a fixed frequency heat pump relay module. The heat pump drive module is connected to the main control module and is used to drive the variable frequency heat pump or the fixed frequency heat pump to operate according to the control instructions of the main control module.

[0163] The control board of this embodiment can be applied to mechanical equipment such as heat pump water heaters. The heat pump's drive, specifically the heat pump compressor, is typically configured in heat pump equipment with only one of the variable-frequency heat pump drive module and the fixed-frequency heat pump drive module, in conjunction with one of the variable-frequency fan drive module and the fixed-frequency fan drive module. For example, a heat pump equipment equipped with both a variable-frequency heat pump drive module and a variable-frequency fan drive module to drive both the variable-frequency heat pump and the variable-frequency fan, ultimately has only one drive mode for each heat pump, making it impossible to adjust the drive mode based on actual usage scenarios.

[0164] The control board of this embodiment includes a main control module, a fan drive module and a heat pump drive module. The fan drive module includes a variable frequency fan drive module and a fixed frequency fan relay module, and the fan drive module is connected to the main control module and is used to drive the variable frequency fan or the fixed frequency fan to operate according to the control instructions of the main control module. The heat pump drive module includes a variable frequency heat pump drive module and a fixed frequency heat pump relay module, and the heat pump drive module is connected to the main control module and is used to drive the variable frequency heat pump or the fixed frequency heat pump to operate according to the control instructions of the main control module. Since the control board integrates the variable frequency fan drive module, the fixed frequency fan relay module, the variable frequency heat pump drive module and the fixed frequency heat pump relay module, the variable frequency fan drive module can be selected according to actual needs to drive the variable frequency fan and cooperate with the variable frequency heat pump drive module to drive the variable frequency heat pump; or the variable frequency fan drive module can be selected to drive the variable frequency fan and cooperate with the fixed frequency heat pump relay module to drive the fixed frequency heat pump; or the fixed frequency fan relay module can be selected to drive the fixed frequency fan and cooperate with the variable frequency heat pump drive module to drive the variable frequency heat pump; or the fixed frequency fan relay module can be selected to drive the fixed frequency fan and cooperate with the fixed frequency heat pump relay module to drive the fixed frequency heat pump. In other words, there are four optional driving modes to meet the needs of diversified driving.

[0165] Furthermore, since the traditional driving method is to set driving modules in the heat pump and the fan respectively to drive the heat pump and the fan, it is not conducive to the unified control and maintenance of the driving modules. In this embodiment, the driving modules in the heat pump and the fan are integrated into the same control board, which facilitates the unified control of the driving modules by the same main control and is conducive to the unified maintenance of each driving module.

[0166] In one embodiment, the control board is arranged outside the variable frequency fan, the variable frequency heat pump, the fixed frequency fan and the fixed frequency heat pump.

[0167] Currently, for equipment using variable frequency heat pumps and variable frequency fans, the variable frequency heat pump drive module is installed inside the variable frequency heat pump compressor, and the variable frequency fan drive module is installed inside the variable frequency fan. The compressor motor and variable frequency fan motor of the variable frequency heat pump will generate heat during operation. The main sources of heat are as follows:

[0168] 1. The motor core will be affected by the magnetic flux and produce hysteresis loss and eddy current loss, thereby generating heat;

[0169] 2. The current in the motor winding will generate Joule heat, causing the winding to heat up;

[0170] 3. The motor bearings will be affected by friction and inertia, which will generate heat.

[0171] In addition, the heating elements in the variable frequency drive module will also generate heat. The heat sources are mainly from the following aspects:

[0172] 1. IGBT (Insulated Gate Bipolar Transistor), MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor), or IPM (Intelligent Power Module) has a certain resistance when it is turned on. When current passes through it, it generates Joule heat, thereby generating heat.

[0173] 2. High-frequency switching is required when the heating element is turned on and off, which generates high heat;

[0174] 3. The heating element requires a higher turn-off voltage when turned off, thereby generating higher heat;

[0175] 4. The operating temperature of the heating device is high, which increases its on-resistance and off-voltage, thereby generating more heat.

[0176] Since the compressor and variable frequency fan of the variable frequency heat pump where the variable frequency drive module is located generate heat, as well as the heating elements of the variable frequency drive module itself generate heat, it is necessary to use measures such as setting up heat sinks to dissipate heat from the heating elements to ensure the normal operation of the variable frequency drive module. However, at the same time, the heat dissipation cost will increase. In addition, since the variable frequency drive module is integrated on the corresponding motor, the size of the motor will also become relatively large, which in turn leads to higher costs for the structural parts that fix the motor.

[0177] In this embodiment, the control board integrating the variable frequency fan drive module and the variable frequency heat pump drive module is arranged outside the variable frequency fan and the variable frequency heat pump, so that the variable frequency drive module is far away from the heat source, thereby avoiding the influence of the internal environment heating of the variable frequency fan and the variable frequency heat pump on the variable frequency drive module. At the same time, it also helps to dissipate the heat of the heating elements of the variable frequency drive module itself, improves the stability of the operation of the variable frequency drive module, and reduces the heat dissipation cost. In addition, since the variable frequency fan drive module is separated from the variable frequency fan motor, and the variable frequency heat pump drive module is separated from the compressor motor of the variable frequency heat pump, the height of each motor is reduced (for example, the height of the variable frequency fan motor can be reduced by 10 mm), the volume of the motor and the amount of motor body material used are reduced, which helps to reduce the motor fixing cost and the manufacturing cost of the motor itself.

[0178] 1 , in one embodiment, the control panel may further include:

[0179] Variable frequency fan interface 3, the variable frequency fan drive module is connected to the three-phase motor of the variable frequency fan through the variable frequency fan interface 3. The variable frequency fan drive module can drive the variable frequency fan to operate according to the target speed, target power or target current according to the control instructions of the main control module, and feed back the actual speed, actual power, actual current and fault information of the variable frequency fan to the main control module;

[0180] The variable frequency heat pump interface 4, the variable frequency heat pump drive module is connected to the three-phase motor of the variable frequency heat pump through the variable frequency heat pump interface 4. The variable frequency heat pump drive module can drive the compressor of the variable frequency heat pump to operate according to the target speed, target power or target current according to the control instructions of the main control module, and feed back the actual speed, actual power, actual current and fault information of the compressor of the variable frequency heat pump to the main control module;

[0181] Furthermore, the variable frequency fan drive module and the main control module communicate with each other via a universal asynchronous receiver / transmitter, or a bidirectional two-wire synchronous serial bus, or a serial peripheral interface;

[0182] The variable frequency heat pump drive module and the main control module communicate with each other through a universal asynchronous receiver and transmitter, or a bidirectional two-wire synchronous serial bus, or a serial peripheral interface.

[0183] Among them, the variable frequency fan interface 3 has three pins corresponding to the three-phase terminals U, V, and W of the three-phase motor in the variable frequency fan. The variable frequency fan drive module is connected to the three-phase motor in the variable frequency fan through these three pins;

[0184] Similarly, the variable frequency heat pump interface 4 has three pins corresponding to the three-phase terminals U, V, and W of the three-phase motor in the variable frequency heat pump. The variable frequency heat pump drive module is connected to the three-phase motor in the variable frequency heat pump through these three pins.

[0185] Traditional variable-frequency heat pumps and variable-frequency fans use PWM (Pulse Width Modulation) duty cycle communication. This means the main control module sends PWM control commands to the variable-frequency heat pump and fan drive modules, which then drive the heat pump and fan accordingly. However, this method requires four wires to connect the compressor motor and fan motor to the main control module through their respective variable-frequency drive modules. For example, in a variable-frequency heat pump, the first wire provides power to the compressor motor; the second grounds the compressor motor; the third provides PWM control commands; and the fourth transmits speed feedback signals from the compressor motor to the main control module. The four wires for the variable-frequency fan motor are similar.

[0186] In this embodiment, since the variable frequency fan drive module and the main control module, as well as the variable frequency heat pump drive module and the main control module communicate through a universal asynchronous receiver and transmitter, or a bidirectional two-wire synchronous serial bus, or a serial peripheral interface, the number of wires connecting the compressor motor of the variable frequency heat pump and the variable frequency fan motor to the main control module through their respective variable frequency drive modules can be reduced from four to three, and the wires are respectively connected to the three-phase terminals of each motor, thereby reducing the wiring harness cost.

[0187] On the other hand, using PWM duty cycle communication will result in duty cycle sending and receiving errors. The sources of the errors are as follows:

[0188] The duty cycle is the ratio of the count value of the main control module counter to the maximum value of the counter. If the main frequency of the main control module is too high, the counter count value will be too small, resulting in a small calculated duty cycle; if the main frequency of the main control module is too low, the counter count value will be too large, resulting in a large calculated duty cycle, that is, the main frequency error will lead to the duty cycle error, and the main control module has such a main frequency error whether it is sending PWM control signals or receiving PWM feedback signals, which leads to sending errors and receiving errors of the duty cycle.

[0189] Due to the existence of the above errors, the main control module's control of the motor deviates greatly from the target value, which sometimes affects the operation of the entire system of the heat pump water heater.

[0190] In this embodiment, the main control module communicates through a universal asynchronous receiver and transmitter, or a bidirectional two-wire synchronous serial bus, or a serial peripheral interface to control the operation of the motor. On the one hand, the wires connecting the compressor motor and the variable frequency fan motor of the variable frequency heat pump to the main control module through their respective variable frequency drive modules can be reduced from four to three, thereby reducing the wiring harness cost and improving the data transmission rate. On the other hand, the verification link in this type of communication can be utilized to improve the accuracy of data transmission, so that the target index value in the control instruction can be accurately informed to the target motor, and the target motor can also accurately feed back the current actual index value to the main control module. In practice, the data transmission error can be reduced by 1%-3%, which is beneficial to improving the control accuracy of the entire system.

[0191] 1 , in one embodiment, the control panel may further include:

[0192] Fixed frequency fan interface 5, the fixed frequency fan relay module is connected to the fixed frequency fan through the fixed frequency fan interface 5;

[0193] The fixed-frequency heat pump interface 6 , through which the fixed-frequency heat pump relay module is connected to the fixed-frequency heat pump.

[0194] The fixed-frequency fan relay module is equivalent to the switch of the fixed-frequency fan. When receiving the control command from the main control module, it drives the fixed-frequency fan to start or stop running.

[0195] Similarly, the fixed-frequency heat pump relay module is equivalent to the switch of the fixed-frequency heat pump. When it receives the control instruction from the main control module, it drives the fixed-frequency heat pump to start or stop running.

[0196] This embodiment utilizes the switching characteristics of the relay to conveniently control the switching of the fixed-frequency fan and the fixed-frequency heat pump.

[0197] 1 , in one embodiment, the control panel may further include:

[0198] A switching power supply module, wherein a first end of the switching power supply module is connected to the mains, a second end of the switching power supply module is isolatedly connected to the main control module, and a third end of the switching power supply module is non-isolatedly connected to the variable frequency fan drive module and the variable frequency heat pump drive module;

[0199] A first optical coupling isolation module 8, which is connected between the variable frequency fan drive module and the main control module;

[0200] A second optical coupling isolation module 9, which is connected between the variable frequency heat pump drive module and the main control module;

[0201] The variable frequency fan is a high-pressure variable frequency fan, and the variable frequency heat pump is a high-pressure variable frequency heat pump;

[0202] This embodiment adopts a high-voltage frequency conversion solution. The switching power supply module rectifies 220V or 110V AC mains power and outputs 310V high-voltage DC power. Since the voltage applied by the switching power supply module to the variable-frequency fan motor winding and the variable-frequency heat pump compressor motor winding through the variable-frequency drive module is non-isolated high-voltage electricity, an optocoupler isolation module is required between the variable-frequency drive module and the main control module to achieve isolated communication and improve communication reliability and stability.

[0203] In one embodiment, the control panel may further include:

[0204] A switching power supply module, wherein a first end of the switching power supply module is connected to the mains, a second end of the switching power supply module is isolated and connected to the main control module, and a third end of the switching power supply module is isolated and connected to the variable frequency fan drive module and the variable frequency heat pump drive module;

[0205] The variable frequency fan is a low-voltage variable frequency fan, and the variable frequency heat pump is a low-voltage variable frequency heat pump.

[0206] This embodiment adopts a low-voltage frequency conversion solution. The switching power supply module rectifies 220V or 110V AC mains power and outputs low-voltage DC power such as 36V and 24V. Since the voltage applied by the switching power supply module to the variable-frequency fan motor winding and the variable-frequency heat pump compressor motor winding through the variable-frequency drive module is isolated low-voltage electricity, there is no need to add an optocoupler isolation module between the variable-frequency drive module and the main control module, thereby ensuring communication reliability and stability.

[0207] 1 , in one embodiment, the control panel may further include:

[0208] The electronic anode driving module and the electronic anode interface 1 , the first end of the electronic anode driving module is connected to the main control module, and the second end of the electronic anode driving module is connected to the electronic anode through the electronic anode interface 1 .

[0209] This embodiment provides an electronic anode driving module, which can drive the electronic anode to release ions to neutralize metal ions in water according to the instructions of the main control module, reduce scaling and rust, and feed back the actual neutralization status to the main control module.

[0210] 1 , in one embodiment, the control panel may further include:

[0211] A leakage detection module is connected between the switching power supply module and the mains;

[0212] A current detection module 10 is connected between the leakage detection module and the mains;

[0213] A sensor driving module and a sensor interface 7, wherein a first end of the sensor driving module is connected to the main control module, and a second end of the sensor driving module is connected to temperature sensors at different positions through the sensor interface 7;

[0214] A high-voltage switch driving module and a high-voltage switch interface 2, wherein a first end of the high-voltage switch driving module is connected to the main control module, and a second end of the high-voltage switch driving module is connected to the high-voltage switch through the high-voltage switch interface 2;

[0215] a display panel communication module, wherein a first end of the display panel communication module is connected to the main control module, and a second end of the display panel communication module is connected to the display panel;

[0216] Among them, the leakage detection module can detect whether there is leakage by detecting the current difference between the neutral and live wires, and feedback the leakage status to the main control module in the form of level;

[0217] The current detection module 10 can determine the current size of the load during system operation by detecting the live wire current and feed back the current status to the main control module;

[0218] The sensor driver module can drive the temperature sensors at different positions of the heat pump equipment to detect the temperature at the current position according to the control instructions of the main control module, and feed back the temperature of each position to the main control module;

[0219] The high-voltage switch driver module can drive the high-voltage switch to detect the operating pressure of the system according to the control instructions of the main control module, and feed back the pressure signal to the main control module when the operating pressure exceeds the preset pressure;

[0220] The display panel communication module can display the equipment operation indicators fed back to the main control module according to the control instructions of the main control module.

[0221] It should be noted that the switching power board module can be connected to each module to convert AC mains power into DC voltage, and provide power to the main control module, the frequency conversion chip, driver chip, MOSFET / IGBT / IPM in the frequency conversion fan drive / frequency conversion heat pump drive module, as well as the fixed frequency fan / fixed frequency heat pump relay module, electronic anode drive module, high-voltage switch drive module, sensor drive module, leakage detection module, current detection module 10, and display board communication template.

[0222] In actual application, the switching power supply module and the display panel communication module can be connected non-isolated, and an isolation optocoupler module can be connected between the main control module and the display panel communication module to achieve isolated communication and ensure the stability and reliability of communication.

[0223] The main control module is primarily responsible for sending control commands to each module and collecting and processing the operating status and measurement values ​​of each component fed back by each module. It then displays the collected data on the display board via UART or 485 communication. Taking a heat pump water heater as an example, the main control module can control the water temperature in the water tank through performance logic and collect the values ​​of the first temperature sensor 11, including the inner tank surface temperature sensor, and the second temperature sensor 12, including the evaporator temperature sensor, ambient temperature sensor, exhaust temperature sensor, and return air temperature sensor, and transmit these temperature sensor values ​​to the display board for display.

[0224] This embodiment sets up multiple functional modules on the control panel, which can transmit the control instructions of the main control module to the various components of the heat pump equipment through these functional modules, and feed back the actual operating status and measurement values ​​of each component to the main control module. Finally, the data collected by the main control module is processed and transmitted to the display panel for display.

[0225] 1 , an embodiment of the present application provides a water heater, comprising: a variable frequency fan, a fixed frequency fan, a variable frequency heat pump, a fixed frequency heat pump, an electronic anode, a temperature sensor, a high voltage switch, a display panel, and the aforementioned control panel (as shown in FIG1 ).

[0226] Since the water heater of this embodiment includes the aforementioned control panel, the water heater of this embodiment also has the beneficial effects of the control panel described in the aforementioned embodiments, which will not be described in detail here.

[0227] 1 , an embodiment of the present application provides a driving method, including:

[0228] The main control module is controlled to send a variable frequency fan control signal to the variable frequency fan drive module, which is controlled to amplify the variable frequency fan control signal to obtain a variable frequency fan amplified signal. The variable frequency fan drive module is controlled to send the amplified signal to the variable frequency fan, and the variable frequency fan is controlled to operate according to the amplified signal. At the same time:

[0229] The main control module is controlled to send a variable frequency heat pump control signal to the variable frequency heat pump drive module, the variable frequency heat pump drive module is controlled to amplify the variable frequency heat pump control signal to obtain a variable frequency heat pump amplified signal, the variable frequency heat pump drive module is controlled to send the variable frequency heat pump amplified signal to the variable frequency heat pump, and the variable frequency heat pump is controlled to operate according to the variable frequency heat pump amplified signal.

[0230] Furthermore, the driving method may further include:

[0231] The main control module is controlled to send a variable frequency fan control signal to the variable frequency fan drive module, which is controlled to amplify the variable frequency fan control signal to obtain a variable frequency fan amplified signal. The variable frequency fan drive module is controlled to send the amplified signal to the variable frequency fan, and the variable frequency fan is controlled to operate according to the amplified signal. At the same time:

[0232] The main control module sends a fixed-frequency heat pump control signal to the fixed-frequency heat pump relay module, and controls the fixed-frequency heat pump relay module to close according to the fixed-frequency heat pump control signal to drive the fixed-frequency heat pump to operate.

[0233] Furthermore, the driving method may further include:

[0234] The main control module sends a fixed-frequency fan control signal to the fixed-frequency fan relay module, which controls the fixed-frequency fan relay module to close according to the fixed-frequency fan control signal to drive the fixed-frequency fan to operate. At the same time:

[0235] The main control module is controlled to send a variable frequency heat pump control signal to the variable frequency heat pump drive module, the variable frequency heat pump drive module is controlled to amplify the variable frequency heat pump control signal to obtain a variable frequency heat pump amplified signal, the variable frequency heat pump drive module is controlled to send the variable frequency heat pump amplified signal to the variable frequency heat pump, and the variable frequency heat pump is controlled to operate according to the variable frequency heat pump amplified signal.

[0236] Furthermore, the driving method may further include:

[0237] The main control module sends a fixed-frequency fan control signal to the fixed-frequency fan relay module, which controls the fixed-frequency fan relay module to close according to the fixed-frequency fan control signal to drive the fixed-frequency fan to operate. At the same time:

[0238] The main control module sends a fixed-frequency heat pump control signal to the fixed-frequency heat pump relay module, and controls the fixed-frequency heat pump relay module to close according to the fixed-frequency heat pump control signal to drive the fixed-frequency heat pump to operate.

[0239] This embodiment can realize four different driving schemes by cooperating the fixed frequency drive and variable frequency drive of the fan with the fixed frequency drive and variable frequency drive of the heat pump to meet diverse driving requirements.

[0240] FIG2 is a circuit diagram of a control board provided in an embodiment of the present application. Referring to FIG2 , an embodiment of the present application provides a control board, including:

[0241] Main control module;

[0242] The fixed-frequency fan relay module is connected to the main control module and is used to drive the fixed-frequency fan to operate according to the control instructions of the main control module;

[0243] The variable frequency heat pump drive module is connected to the main control module and is used to drive the variable frequency heat pump to operate according to the control instructions of the main control module;

[0244] The control panel is arranged outside the fixed-frequency fan and the variable-frequency heat pump.

[0245] The control board of this embodiment can be applied to mechanical equipment such as heat pump water heaters, and the driving of the heat pump is to drive the heat pump compressor.

[0246] The heat source of the compressor motor of the variable frequency heat pump can be referred to above and will not be repeated here.

[0247] In addition, the heat source of the heating element in the variable frequency heat pump drive module is the same as the heat source of the variable frequency drive module described above, and will not be repeated here.

[0248] The control panel of the present application includes a main control module, a fixed-frequency fan relay module and a variable-frequency heat pump drive module. The fixed-frequency fan relay module is connected to the main control module and is used to drive the fixed-frequency fan to operate according to the control instructions of the main control module. The variable-frequency heat pump drive module is connected to the main control module and is used to drive the variable-frequency heat pump to operate according to the control instructions of the main control module. The control panel is arranged outside the fixed-frequency fan and the variable-frequency heat pump. By arranging the control panel with the integrated variable-frequency heat pump drive module outside the variable-frequency heat pump, the variable-frequency heat pump drive module is kept away from the heat source, thereby avoiding the influence of the internal environment heating of the variable-frequency heat pump on the variable-frequency heat pump drive module. At the same time, it also helps to dissipate the heat of the heating elements of the variable-frequency heat pump drive module itself, thereby improving the stability of the operation of the variable-frequency heat pump drive module.

[0249] Furthermore, since the traditional driving method uses measures such as setting a heat sink to dissipate heat from the heating element, which will increase the heat dissipation cost, this embodiment does not require the use of a heat sink, which can reduce the heat dissipation cost.

[0250] Furthermore, since the variable frequency heat pump drive module is usually integrated into the compressor motor of the variable frequency heat pump, the size of the compressor motor will be relatively large, which in turn leads to a higher cost for the structural parts of the fixed motor. In this embodiment, the variable frequency heat pump drive module is separated from the compressor motor of the variable frequency heat pump, so that the height of the motor is reduced, the size of the motor and the amount of motor body material used are reduced, which helps to reduce the motor fixing cost and the manufacturing cost of the motor itself.

[0251] Furthermore, since the traditional driving method is to set driving modules in the heat pump and the fan respectively to drive the heat pump and the fan, it is not conducive to the unified control and maintenance of the driving modules. In this embodiment, the driving modules in the heat pump and the fan are integrated into the same control board, which facilitates the unified control of the driving modules by the same main control and is conducive to the unified maintenance of each driving module.

[0252] 2 , in one embodiment, the control panel may further include:

[0253] Variable frequency heat pump interface 2-3, the variable frequency heat pump drive module is connected to the three-phase motor of the variable frequency heat pump through the variable frequency heat pump interface 2-3. The variable frequency heat pump drive module can drive the compressor of the variable frequency heat pump to operate according to the target speed, target power or target current according to the control instructions of the main control module, and feed back the actual speed, actual power, actual current and fault information of the compressor of the variable frequency heat pump to the main control module.

[0254] Furthermore, the variable frequency heat pump drive module and the main control module communicate with each other via a universal asynchronous receiver / transmitter, or a bidirectional two-wire synchronous serial bus, or a serial peripheral interface.

[0255] Among them, the variable frequency heat pump interface 2-3 has three pins corresponding to the three-phase terminals U, V, and W of the three-phase motor in the variable frequency heat pump. The variable frequency heat pump drive module is connected to the three-phase motor in the variable frequency heat pump through these three pins.

[0256] Traditional variable-frequency heat pumps use PWM (Pulse Width Modulation) duty cycle communication, where the main control module sends PWM control instructions to the variable-frequency heat pump drive module, which then drives the heat pump according to these control instructions. However, this method requires four wires to connect the compressor motor of the variable-frequency heat pump to the main control module through the variable-frequency heat pump drive module. The first wire is used to provide power voltage to the compressor motor of the variable-frequency heat pump, the second wire is used to ground the compressor motor of the variable-frequency heat pump, the third wire is used to provide PWM control instructions to the compressor motor of the variable-frequency heat pump, and the fourth wire is used to feed the speed feedback signal of the compressor motor of the variable-frequency heat pump back to the main control module.

[0257] In this embodiment, since the variable frequency heat pump drive module and the main control module communicate through a universal asynchronous receiver and transmitter, or a bidirectional two-wire synchronous serial bus, or a serial peripheral interface, the number of wires connecting the compressor motor of the variable frequency heat pump and the main control module through the variable frequency heat pump drive module can be reduced from four to three, and the wires are respectively connected to the three-phase terminals of the motor, thereby reducing the wiring harness cost.

[0258] On the other hand, when using PWM duty cycle communication, there will be transmission error and reception error of the duty cycle. The source of the error can be referred to above and will not be repeated here.

[0259] Due to the existence of the above errors, the main control module's control of the motor deviates greatly from the target value, which sometimes affects the operation of the entire system of the heat pump water heater.

[0260] In this embodiment, the main control module communicates through a universal asynchronous receiver and transmitter, or a bidirectional two-wire synchronous serial bus, or a serial peripheral interface to control the operation of the motor. On the one hand, the number of wires connecting the compressor motor of the variable frequency heat pump and the main control module through the variable frequency heat pump drive module can be reduced from four to three, thereby reducing the wiring harness cost and improving the data transmission rate. On the other hand, the verification link in this type of communication can be utilized to improve the accuracy of data transmission, so that the target index value in the control instruction can be accurately informed to the target motor, and the target motor can also accurately feed back the current actual index value to the main control module. In practice, the data transmission error can be reduced by 1%-3%, which is beneficial to improving the control accuracy of the entire system.

[0261] 2 , in one embodiment, the control panel may further include:

[0262] Fixed-frequency fan interface 2-4: The fixed-frequency fan relay module is connected to the fixed-frequency fan through the fixed-frequency fan interface 2-4.

[0263] The fixed-frequency fan relay module is equivalent to the switch of the fixed-frequency fan. When it receives the control instruction from the main control module, it drives the fixed-frequency fan to start or stop running.

[0264] This embodiment utilizes the switching characteristics of the relay to conveniently control the switching of the fixed-frequency fan.

[0265] 2 , in one embodiment, the control panel may further include:

[0266] A switching power supply module, wherein a first end of the switching power supply module is connected to the mains, a second end of the switching power supply module is isolatedly connected to the main control module, and a third end of the switching power supply module is non-isolatedly connected to the variable frequency heat pump drive module;

[0267] A third optical coupling isolation module 2-6, the third optical coupling isolation module 2-6 is connected between the variable frequency heat pump drive module and the main control module;

[0268] The variable frequency heat pump is a high-pressure variable frequency heat pump.

[0269] This embodiment adopts a high-voltage frequency conversion solution. The switching power supply module rectifies 220V or 110V AC mains power and outputs 310V high-voltage DC power. Since the voltage applied by the switching power supply module to the compressor motor winding of the variable-frequency heat pump through the variable-frequency heat pump drive module is non-isolated high-voltage electricity, an optocoupler isolation module is required between the variable-frequency heat pump drive module and the main control module to achieve isolated communication and improve communication reliability and stability.

[0270] In one embodiment, the control panel may further include:

[0271] A switching power supply module, wherein a first end of the switching power supply module is connected to the mains, a second end of the switching power supply module is isolated and connected to the main control module, and a third end of the switching power supply module is isolated and connected to the variable frequency heat pump drive module;

[0272] The variable frequency heat pump is a low-voltage variable frequency heat pump.

[0273] This embodiment adopts a low-voltage frequency conversion solution. The switching power supply module rectifies 220V or 110V AC mains power and outputs low-voltage DC power such as 36V and 24V. Since the voltage applied by the switching power supply module to the compressor motor winding of the variable-frequency heat pump through the variable-frequency heat pump drive module is isolated low-voltage electricity, there is no need to add an optocoupler isolation module between the variable-frequency heat pump drive module and the main control module, thereby ensuring communication reliability and stability.

[0274] 2 , in one embodiment, the control panel may further include:

[0275] The electronic expansion valve driving module and the electronic expansion valve interface 2-2, the first end of the electronic expansion valve driving module is connected to the main control module, and the second end of the electronic expansion valve driving module is connected to the electronic expansion valve through the electronic expansion valve interface 2-2.

[0276] This embodiment provides an electronic expansion valve driving module, which can drive the electronic expansion valve to a target number of steps according to the control instructions of the main control module, and feed back the actual number of steps to the main control module.

[0277] 2 , in one embodiment, the control panel may further include:

[0278] A leakage detection module is connected between the switching power supply module and the mains;

[0279] Current detection module 2-7, current detection module 2-7 is connected between the leakage detection module and the mains;

[0280] A sensor driver module and a sensor interface 2-5, wherein a first end of the sensor driver module is connected to the main control module, and a second end of the sensor driver module is connected to temperature sensors at different locations through the sensor interface 2-5;

[0281] High-voltage switch driver module and high-voltage switch interface 2-1, the first end of the high-voltage switch driver module is connected to the main control module, and the second end of the high-voltage switch driver module is connected to the high-voltage switch through the high-voltage switch interface 2-1;

[0282] a display panel communication module, wherein a first end of the display panel communication module is connected to the main control module, and a second end of the display panel communication module is connected to the display panel;

[0283] Among them, the leakage detection module can detect whether there is leakage by detecting the current difference between the neutral and live wires, and feedback the leakage status to the main control module in the form of level;

[0284] The current detection module 2-7 can determine the current size of the load during system operation by detecting the live wire current and feedback the current status to the main control module;

[0285] The sensor driver module can drive the temperature sensors at different positions of the heat pump equipment to detect the temperature at the current position according to the control instructions of the main control module, and feed back the temperature of each position to the main control module;

[0286] The high-voltage switch driver module can drive the high-voltage switch to detect the operating pressure of the system according to the control instructions of the main control module, and feed back the pressure signal to the main control module when the operating pressure exceeds the preset pressure;

[0287] The display panel communication module can display the equipment operation indicators fed back to the main control module according to the control instructions of the main control module.

[0288] It should be noted that the switching power board module can be connected to each module to convert AC mains power into DC voltage, and provide power to the main control module, the frequency conversion chip, driver chip, MOSFET / IGBT / IPM in the variable frequency heat pump drive module, as well as the fixed frequency fan relay module, electronic expansion valve drive module, high-voltage switch drive module, sensor drive module, leakage detection module, current detection modules 2-7, and display board communication template.

[0289] In actual application, the switching power supply module and the display panel communication module can be connected non-isolated, and an isolation optocoupler module can be connected between the main control module and the display panel communication module to achieve isolated communication and ensure the stability and reliability of communication.

[0290] The main control module is primarily responsible for sending control commands to each module and collecting and processing the operating status and measurement values ​​of each component fed back by each module. It then displays the collected data on the display board via UART or 485 communication. For example, in a heat pump water heater, the main control module can control the water tank temperature through performance logic and collect the values ​​of temperature sensors 2-8 (including the inner tank surface temperature sensor) and 2-9 (including the evaporator temperature sensor, ambient temperature sensor, exhaust gas temperature sensor, and return air temperature sensor) in the third position, and transmit these temperature sensor values ​​to the display board for display.

[0291] This embodiment sets up multiple functional modules on the control panel, which can transmit the control instructions of the main control module to the various components of the heat pump equipment through these functional modules, and feed back the actual operating status and measurement values ​​of each component to the main control module. Finally, the data collected by the main control module is processed and transmitted to the display panel for display.

[0292] 2 , an embodiment of the present application provides a water heater, including the aforementioned control panel (as shown in FIG. 2 ).

[0293] Since the water heater of this embodiment includes the aforementioned control panel, the water heater of this embodiment also has the beneficial effects of the control panel described in the aforementioned embodiments, which will not be described in detail here.

[0294] 2 , in one embodiment, the water heater further includes a fixed-frequency fan, a variable-frequency heat pump, an electronic expansion valve, a temperature sensor, a high-voltage switch, and a display panel.

[0295] Since the water heater of this embodiment includes the aforementioned control panel, the water heater of this embodiment also has the beneficial effects of the control panel described in the aforementioned embodiments, which will not be described in detail here.

[0296] The control panel and water heater of the present application will be described below with reference to FIG3 and FIG4 .

[0297] According to an embodiment of the present application, as shown in Figures 3 and 4, the control board includes a main control board 4-1, a variable frequency fan drive module 4-2 and a fixed frequency heat pump switch module 4-4. The main control board 4-1 is provided with a control module 4-11, and the variable frequency fan drive module 4-2 is integrated in the main control board 4-1. The input end of the variable frequency fan drive module 4-2 is electrically connected to the first output end of the control module 4-11, and the output end of the variable frequency fan drive module 4-2 is electrically connected to the variable frequency fan 4-3. The input end of the fixed frequency heat pump switch module 4-4 is electrically connected to the second output end of the control module 4-11, and the output end of the fixed frequency heat pump switch module 4-4 is electrically connected to the fixed frequency heat pump 4-5.

[0298] According to the control board of the embodiment of the present application, the control module 4-11 sends corresponding control signals to the variable frequency fan drive module 4-2 and the fixed frequency heat pump switch module 4-4, so that the variable frequency fan drive module 4-2 can drive the fan to operate according to the target operating parameters, and the fixed frequency heat pump switch module 4-4 can control the fixed frequency heat pump 4-5 to switch on and off. The variable frequency fan drive module 4-2 is integrated into the main control board 4-1, that is, the variable frequency fan drive module 4-2 and the control module 4-11 can share a board, without the need to set up a separate variable frequency fan 4-3 control board, thereby effectively reducing the volume occupied by the variable frequency fan drive module 4-2. Moreover, the main control board 4-1 integrated with the variable frequency fan drive module 4-2 is not installed in the variable frequency fan 4-3, that is, there is no variable frequency fan 4-3 control board in the variable frequency fan 4-3, thereby effectively reducing the volume of the variable frequency fan 4-3, reducing the materials required for the production of the variable frequency fan 4-3, and reducing costs. At this time, only the main control board 4 - 1 needs to be fixed, and there is no need to set up additional fixing structures to fix the variable frequency fan drive module 4 - 2, which can effectively reduce the number of fixing structures and reduce costs.

[0299] It is understandable that the control panel is generally installed in a space outside the fan and the heat pump, and is not installed inside the fan or the heat pump.

[0300] It is understandable that in the related art, since the variable frequency fan 4-3 control board is installed inside the variable frequency fan 4-3, both the variable frequency fan 4-3 control board and the variable frequency fan 4-3 generate heat when they are working, which in turn leads to a large amount of heat inside the variable frequency fan 4-3, a high ambient temperature, and a poor heat dissipation effect. An additional heat dissipation structure is required to meet the heat dissipation requirements, resulting in a high heat dissipation cost. However, the present application integrates the variable frequency fan drive module 4-2 into the main control board 4-1, so that the variable frequency fan drive module 4-2 and the variable frequency fan 4-3 are in different spaces, so that the heat dissipation of the variable frequency fan drive module 4-2 and the heat dissipation of the variable frequency fan 4-3 do not affect each other, thereby improving the heat dissipation effect, and thus can meet the heat dissipation requirements with fewer heat dissipation structures, reducing the heat dissipation cost.

[0301] It's understandable that when a water heater uses variable frequency fan 4-3, if the variable frequency fan 4-3 control board is installed inside the variable frequency fan 4-3, the following conditions will occur due to the heat generated by variable frequency fan 4-3 during operation: a. The motor core will be affected by magnetic flux, generating hysteresis and eddy current losses, which in turn generate heat; b. The current in the motor windings will generate Joule heating, which will cause the windings to heat up; c. The motor bearings will be affected by friction and inertia, which will also generate heat. The variable frequency fan 4-3 control board is placed close to the motor body. The heating elements in the variable frequency drive board, such as IGBTs, MOS transistors, or IPMs, generate Joule heating when current passes through them, which in turn generates heat. When the IGBTs and MOS transistors are turned off, certain heating components require high-frequency switching. During this switching, a cutoff voltage is applied. The higher the cutoff voltage, the greater the heat generated. These heating components require high-frequency switching, which also generates a certain amount of heat during switching. The higher the switching frequency, the greater the heat generated. Furthermore, the higher the operating temperature of the heating element, the higher its on-resistance and off-voltage, generating more heat. This means that the variable frequency fan 4-3 itself will also generate heat, leading to a higher ambient temperature inside the variable frequency fan 4-3. Heat sinks and other structures are required to dissipate heat from the heating element, increasing the cooling cost. Furthermore, integrating the variable frequency fan 4-3 control board into the fan also results in a relatively large fan, requiring structural components to secure the variable frequency fan 4-3 control board, which also results in higher costs.

[0302] It can be understood that the fixed-frequency heat pump switch module 4 - 4 is, for example, a relay.

[0303] In one embodiment of the present application, as shown in FIG3 and FIG4 , the fixed-frequency heat pump switch module 4 - 4 is integrated into the main control board 4 - 1 .

[0304] It can be understood that the fixed-frequency heat pump switch module 4 - 4 and the variable-frequency fan drive module 4 - 2 are integrated into the main control board 4 - 1 at the same time, thereby improving the integration level of the main control board 4 - 1 .

[0305] In one embodiment of the present application, the variable frequency fan drive module 4-2 and the control module 4-11 are communicatively connected via at least one of a serial interface uart, a bidirectional serial data transmission interface I2C, and a serial peripheral interface SPI.

[0306] It can be understood that the communication between the variable frequency fan drive module 4-2 and the control module 4-11 is established through at least one of the serial interface uart or the bidirectional serial data transmission interface I2C or the serial peripheral interface SPI. Since the communication methods such as the serial interface uart or the bidirectional serial data transmission interface I2C or the serial peripheral interface SPI have the verification function, the accuracy of the data transmission between the control module 4-11 and the variable frequency fan drive module 4-2 can be effectively improved, and the precise control of the variable frequency fan 4-3 can be achieved.

[0307] It is understandable that in the water heater in the related art, the variable frequency fan 4-3 and the control module 4-11 are connected through the PWM duty cycle communication method. In the PWM duty cycle communication method, the main frequency error of the chip will affect the counting accuracy of the timer, thereby affecting the calculation of the duty cycle. Therefore, if there is an error in the main frequency of the chip, the duty cycle of sending and receiving may produce a certain error. Specifically, a high main frequency will lead to a small duty cycle, and a low main frequency will lead to a large duty cycle. This will eventually affect the control accuracy of the variable frequency fan 4-3. The variable frequency fan drive module 4-2 and the control module 4-11 of the present application are connected through a serial interface uart or a bidirectional serial data transmission interface I2C or a serial peripheral interface SPI and other communication methods, which can effectively overcome the error problem caused by the PWM duty cycle communication method and improve the control accuracy of the variable frequency fan 4-3.

[0308] It should also be noted that the PWM duty cycle communication method generally requires four wires for VDD, GND, PWM signal, and speed feedback signal, which is relatively expensive. However, the serial interface UART, bidirectional serial data transmission interface I2C, or serial peripheral interface SPI communication method used in this application only requires three wires to connect the variable frequency fan drive module 4-2 and the variable frequency fan 4-3, effectively reducing costs.

[0309] In one embodiment of the present application, as shown in FIG4 , the control board includes a variable frequency fan interface 4 - 31 , which is integrated into the main control board 4 - 1 , and is used to connect the variable frequency fan drive module 4 - 2 and the variable frequency fan 4 - 3 .

[0310] It can be understood that integrating the variable frequency fan interface 4-31 into the main control board 4-1 improves the integration of the main control board 4-1, and connecting the variable frequency fan 4-3 to the variable frequency fan interface 4-31 can realize the connection between the variable frequency fan 4-3 and the variable frequency fan drive module 4-2.

[0311] Illustratively, the variable frequency fan 4-3 is detachably connected to the variable frequency fan interface 4-31, so as to facilitate the disassembly and assembly of the variable frequency fan 4-3 and the replacement of the variable frequency fan 4-3.

[0312] In an embodiment of the present application, the variable frequency fan interface 4-31 includes a first U-phase interface, a first V-phase interface and a first W-phase interface. The first U-phase interface is used to connect the variable frequency fan drive module 4-2 and the U-phase connection end of the variable frequency fan 4-3, the first V-phase interface is used to connect the variable frequency fan drive module 4-2 and the V-phase connection end of the variable frequency fan 4-3, and the first W-phase interface is used to connect the variable frequency fan drive module 4-2 and the first W-phase interface of the variable frequency fan 4-3.

[0313] It can be understood that the variable frequency fan interface 4-31 has a total of three interfaces, namely the first U-phase interface, the first V-phase interface and the first W-phase interface. That is to say, the variable frequency fan interface 4-31 and the variable frequency fan drive module 4-2 can be connected through three wires, and the variable frequency fan interface 4-31 and the variable frequency fan 4-3 can be connected through three wires. This further shows that compared with the relevant technology, this embodiment can use fewer wires to achieve the connection between the variable frequency fan drive module 4-2 and the variable frequency fan 4-3, which can effectively reduce costs.

[0314] In one embodiment of the present application, as shown in FIG4 , the control board includes a fixed-frequency heat pump interface 4 - 51 , which is integrated into the main control board 4 - 1 and used to connect the fixed-frequency heat pump switch module 4 - 4 and the fixed-frequency heat pump 4 - 5 .

[0315] It can be understood that integrating the fixed-frequency heat pump interface 4-51 into the main control board 4-1 improves the integration of the main control board 4-1, and connecting the fixed-frequency heat pump 4-5 with the fixed-frequency heat pump interface 4-51 can realize the connection between the fixed-frequency heat pump 4-5 and the fixed-frequency heat pump 4-5 drive module.

[0316] Illustratively, the fixed-frequency heat pump 4-5 is detachably connected to the fixed-frequency heat pump interface 4-51, which facilitates the disassembly and assembly of the fixed-frequency heat pump 4-5 and the replacement of the fixed-frequency heat pump 4-5.

[0317] In one embodiment of the present application, as shown in FIG4 , the control board includes a fourth optocoupler isolation module 4 - 6 , and the fourth optocoupler isolation module 4 - 6 is disposed between the variable frequency fan drive module 4 - 2 and the control module 4 - 11 .

[0318] It can be understood that by providing the fourth optical coupling isolation module 4-6 between the variable frequency fan drive module 4-2 and the control module 4-11, the stability of the main control board 4-1 can be effectively improved.

[0319] It is understandable that when the variable frequency fan 4-3 is a high-voltage variable frequency fan 4-3, it is necessary to set the second and fourth optical coupling isolation modules 4-6 between the variable frequency fan drive module 4-2 and the control module 4-11.

[0320] The high-voltage inverter fan 4-3 and high-voltage fixed-frequency heat pump 4-5 use a high-voltage inverter solution: AC 220V or 110V mains power is rectified to 310V DC. This means the voltage applied to the motor windings is a non-isolated 310V DC. Therefore, optocoupler isolation is required for communication.

[0321] If variable frequency fan 4-3 is a low-voltage variable frequency fan 4-3, the fourth optical coupler isolation module 4-6 can be omitted. A low-voltage variable frequency solution uses AC220 or 110V mains power, which, after passing through an isolation switch, outputs a low-voltage isolated power supply, such as 36V or 24V. The fans used are all low-voltage motors, and since the voltage is isolated, optical coupler isolation is not required.

[0322] In one embodiment of the present application, as shown in FIG4 , the control board includes a PV module 4 - 7 , which is integrated into the main control board 4 - 1 , and the PV module 4 - 7 is used to connect the control module 4 - 11 and the power grid.

[0323] It can be understood that the PV module 4 - 7 is integrated into the main control board 4 - 1 , thereby improving the integration level of the main control board 4 - 1 .

[0324] It is understandable that the PV module 4 - 7 can convert the signal of the power grid into a signal that can be recognized by the control module 4 - 11 and transmit it to the control module 4 - 11.

[0325] It is understood that the PV module 4-7 is a photovoltaic module that can power the control module 4-11. Since the PV module is connected to the power grid, it can transfer excess power to the power grid. When the PV module's own power generation is insufficient to supply the control module 4-11 and other components, it can use the power of the power grid to power the control module 4-11 and other components.

[0326] According to an embodiment of the present application, the water heater includes a variable frequency fan 4-3, a fixed frequency heat pump 4-5 and the above-mentioned control board. The variable frequency fan 4-3 is electrically connected to the variable frequency fan drive module 4-2, and the fixed frequency heat pump 4-5 is electrically connected to the fixed frequency heat pump switch module 4-4.

[0327] According to the water heater of the embodiment of the present application, it has a control board, and the variable frequency fan drive module 4-2 is integrated into the main control board 4-1, which reduces the volume occupied by the variable frequency fan drive module 4-2, and only needs to fix the main control board 4-1, reducing the number of fixed structures and reducing costs.

[0328] In one embodiment of the present application, the control panel is arranged in a space outside the variable frequency fan 4 - 3 , and the control panel is arranged in a space outside the fixed frequency heat pump 4 - 5 .

[0329] It can be understood that the control board is set in the space outside the variable frequency fan 4-3 and the fixed frequency heat pump 4-5, that is, the control board is not inside the variable frequency fan 4-3, nor inside the fixed frequency heat pump 4-5, thereby reducing the mutual influence between the heat generated by the control board during operation and the heat generated by the variable frequency fan 4-3 and the fixed frequency heat pump 4-5, ensuring the heat dissipation efficiency of the control board and the heat dissipation efficiency of the variable frequency fan 4-3 and the fixed frequency heat pump 4-5.

[0330] In one embodiment of the present application, the fixed-frequency heat pump switch module 4-4 is arranged in a space outside the variable-frequency fan 4-3, and the fixed-frequency heat pump switch module 4-4 is arranged in a space outside the fixed-frequency heat pump 4-5.

[0331] It can be understood that the fixed-frequency heat pump switch module 4-4 is set in the space outside the variable-frequency fan 4-3 and the fixed-frequency heat pump 4-5, that is, the fixed-frequency heat pump switch module 4-4 is not in the variable-frequency fan 4-3, nor in the fixed-frequency heat pump 4-5, thereby reducing the mutual influence between the heat generated by the fixed-frequency heat pump switch module 4-4 during operation and the heat generated by the variable-frequency fan 4-3 and the fixed-frequency heat pump 4-5, ensuring the heat dissipation effect of the fixed-frequency heat pump switch module 4-4 and the heat dissipation efficiency of the variable-frequency fan 4-3 and the fixed-frequency heat pump 4-5.

[0332] The control panel and water heater of the present application will be described below with reference to FIG5 and FIG6 .

[0333] According to an embodiment of the present application, as shown in Figures 5 and 6, the control board includes a main control board 6-1, a variable frequency fan drive module 6-2 and a variable frequency heat pump drive module 6-4. The main control board 6-1 is provided with a control module 6-11. The input end of the variable frequency fan drive module 6-2 is electrically connected to the first output end of the control module 6-11, the output end of the variable frequency fan drive module 6-2 is electrically connected to the variable frequency fan 6-3, the input end of the variable frequency heat pump drive module 6-4 is electrically connected to the second output end of the control module 6-11, the output end of the variable frequency heat pump drive module 6-4 is electrically connected to the variable frequency heat pump 6-5, and at least one of the variable frequency fan drive module 6-2 and the variable frequency heat pump drive module 6-4 is integrated in the main control board 6-1.

[0334] According to the control board of the embodiment of the present application, the control module 6-11 sends corresponding control signals to the variable frequency fan drive module 6-2 and the variable frequency heat pump drive module 6-4, so that the variable frequency fan drive module 6-2 can drive the fan to operate according to the target operating parameters, and the variable frequency heat pump drive module 6-4 can drive the variable frequency heat pump 6-5 to operate according to the target operating parameters. At least one of the variable frequency fan drive module 6-2 and the variable frequency heat pump drive module 6-4 is integrated into the main control board 6-1, that is, the variable frequency fan drive module 6-2, the variable frequency heat pump drive module 6-4 and the control module 6-11 can share a single board, eliminating the need to separately provide a control board for the variable frequency fan 6-3 or the variable frequency heat pump 6-5, thereby effectively reducing the volume occupied by the variable frequency fan drive module 6-2 and the variable frequency heat pump drive module 6-4. Furthermore, the main control board 6-1, which integrates the variable frequency fan drive module 6-2 and the variable frequency heat pump drive module 6-4, is not installed in the variable frequency fan 6-3 or the variable frequency heat pump 6-5. That is, the variable frequency fan 6-3 does not have a variable frequency fan 6-3 control board, and the variable frequency heat pump 6-5 does not have a variable frequency heat pump 6-5 control board. This effectively reduces the size of the variable frequency fan 6-3 and the variable frequency heat pump 6-5. Furthermore, by integrating the variable frequency fan drive module 6-2 and the variable frequency heat pump drive module 6-4 into the main control board 6-1, the heat dissipation of the variable frequency fan drive module 6-2 and the variable frequency fan 6-3 do not affect each other, and the heat dissipation of the variable frequency heat pump drive module 6-4 and the variable frequency heat pump 6-5 do not affect each other. This improves the heat dissipation effect, effectively reduces the heat dissipation structure, and reduces the heat dissipation cost.

[0335] It is understandable that in the related art, since the control board of the variable frequency fan 6-3 is installed in the variable frequency fan 6-3, and the control board of the variable frequency heat pump 6-5 is installed in the variable frequency heat pump 6-5, the control board of the variable frequency fan 6-3 and the variable frequency fan 6-3 will generate heat when they are working, and the control board of the variable frequency heat pump 6-5 and the variable frequency heat pump 6-5 will generate heat when they are working, which will lead to a large amount of heat in the variable frequency fan 6-3 and the variable frequency heat pump 6-5, a high ambient temperature, and a poor heat dissipation effect. An additional heat dissipation structure is required to meet the heat dissipation requirements, resulting in a high heat dissipation cost. However, the present application integrates the variable frequency fan drive module 6-2 and the variable frequency heat pump drive module 6-4 into the main control board 6-1, so that the variable frequency fan drive module 6-2 and the variable frequency fan 6-3 are in different spaces, and the variable frequency heat pump drive module 6-4 and the variable frequency heat pump 6-5 are in different spaces, thereby improving the heat dissipation effect, and thus can meet the heat dissipation requirements with fewer heat dissipation structures, reducing the heat dissipation cost.

[0336] It is understandable that the control panel is generally installed in a space outside the fan and the heat pump, and is not installed inside the fan or the heat pump.

[0337] It is understandable that when the water heater uses a variable-frequency compressor and variable-frequency fan 6-3, if the variable-frequency fan 6-3 control board is installed inside the variable-frequency fan 6-3, and the variable-frequency heat pump 6-5 control board is installed inside the variable-frequency heat pump 6-5, then due to the heat generated by the variable-frequency fan 6-3 and variable-frequency heat pump 6-5 during operation, the following conditions may occur: a) the motor core is affected by magnetic flux, generating hysteresis and eddy current losses, which in turn generate heat; b) the current flowing in the motor windings generates Joule heating, which in turn causes the windings to heat up; and c) the motor bearings are affected by friction and inertia, which in turn generates heat. The variable-frequency fan 6-3 and variable-frequency heat pump 6-5 control boards are located close to the motor body. The heating elements in the variable-frequency drive board, such as IGBTs, MOS transistors, or IPMs, generate Joule heating when current flows through them, generating heat. When the IGBTs and MOS transistors are turned off, certain heating components require high-frequency switching, which results in a cutoff voltage. The higher the cutoff voltage, the greater the heat generated. Heat-generating components require high-frequency switching, which also generates a certain amount of heat during switching. The higher the switching frequency, the greater the heat generated. Furthermore, as the operating temperature of the heat-generating component increases, its on-resistance and off-voltage increase, thereby generating more heat. In other words, both the variable-frequency heat pump 6-5 and the variable-frequency fan 6-3 themselves generate heat, leading to higher ambient temperatures within the variable-frequency heat pump 6-5 and variable-frequency fan 6-3. This requires heat sinks and other structures to dissipate heat from the heat-generating components, increasing the cost of heat dissipation. Furthermore, integrating the variable-frequency heat pump 6-5 control board into the variable-frequency heat pump 6-5 and the variable-frequency fan 6-3 control board into the fan also results in a relatively large fan and heat pump assembly. Furthermore, structural components are required to secure the variable-frequency heat pump 6-5 and variable-frequency fan 6-3 control boards, resulting in higher costs.

[0338] In one embodiment of the present application, at least one of the variable frequency fan drive module 6-2 and the variable frequency heat pump 6-5 switch module is communicatively connected to the control module 6-11 through at least one of the serial interface uart or the bidirectional serial data transmission interface I2C or the serial peripheral interface SPI.

[0339] It can be understood that the communication between the variable frequency fan drive module 6-2 and the control module 6-11 is established through at least one of the serial interface uart or the bidirectional serial data transmission interface I2C or the serial peripheral interface SPI, and the communication between the variable frequency heat pump drive module 6-4 and the control module 6-11 is established through at least one of the serial interface uart or the bidirectional serial data transmission interface I2C or the serial peripheral interface SPI. Since the communication methods such as the serial interface uart or the bidirectional serial data transmission interface I2C or the serial peripheral interface SPI have the verification function, the accuracy of the data transmission between the control module 6-11 and the variable frequency fan drive module 6-2 and the variable frequency heat pump drive module 6-4 can be effectively improved, and precise control of the variable frequency fan 6-3 and the variable frequency heat pump 6-5 can be achieved.

[0340] It is understandable that in water heaters in the related art, the connection between the variable frequency fan 6-3 and the control module 6-11, as well as between the variable frequency heat pump 6-5 and the chip, is achieved through PWM duty cycle communication. With PWM duty cycle communication, errors in the chip's main frequency can affect the timer's counting accuracy, thereby affecting the calculation of the duty cycle. Therefore, if there is an error in the chip's main frequency, both the sent and received duty cycles may have certain errors. Specifically, a high main frequency will result in a low duty cycle, while a low main frequency will result in a high duty cycle. This will ultimately affect the control accuracy of the variable frequency fan 6-3 and the variable frequency heat pump 6-5. However, in the present application, the connection between the variable frequency fan drive module 6-2 and the control module 6-11, as well as between the variable frequency heat pump drive module 6-4 and the control module 6-11, is achieved through a communication method such as a serial interface UART, a bidirectional serial data transmission interface I2C, or a serial peripheral interface SPI. This effectively overcomes the error problem caused by PWM duty cycle communication and improves the control accuracy of the variable frequency fan 6-3 and the variable frequency heat pump 6-5.

[0341] It should also be noted that when using PWM duty cycle communication, four wires are generally required for wiring: VDD, GND, PWM signal, and speed feedback signal, which is relatively expensive. However, the communication methods used in this application, such as serial interface UART, bidirectional serial data transmission interface I2C, or serial peripheral interface SPI, only require three wires to connect the variable frequency fan drive module 6-2 and the variable frequency fan 6-3, and the variable frequency heat pump drive module 6-4 and the variable frequency heat pump 6-5, effectively reducing costs.

[0342] In one embodiment of the present application, as shown in FIG6 , the control board includes a variable frequency heat pump interface 6 - 51 , which is integrated into the main control board 6 - 1 and used to connect the variable frequency heat pump drive module 6 - 4 and the variable frequency heat pump 6 - 5 .

[0343] It can be understood that integrating the variable frequency heat pump interface 6-51 into the main control board 6-1 improves the integration of the main control board 6-1, and connecting the variable frequency heat pump 6-5 to the variable frequency heat pump interface 6-51 can realize the connection between the variable frequency heat pump 6-5 and the variable frequency heat pump drive module 6-4.

[0344] Illustratively, the variable frequency heat pump 6-5 is detachably connected to the variable frequency heat pump interface 6-51, so as to facilitate the disassembly and assembly of the variable frequency heat pump 6-5 and the replacement of the variable frequency heat pump 6-5.

[0345] In an embodiment of the present application, the variable frequency heat pump interface 6-51 includes a second U-phase interface, a second V-phase interface and a second W-phase interface. The second U-phase interface is used to connect the variable frequency heat pump drive module 6-4 and the U-phase connection end of the variable frequency heat pump 6-5, the second V-phase interface is used to connect the variable frequency heat pump drive module 6-4 and the V-phase connection end of the variable frequency heat pump 6-5, and the second W-phase interface is used to connect the variable frequency heat pump drive module 6-4 and the W-phase interface of the variable frequency heat pump 6-5.

[0346] It can be understood that the variable frequency heat pump interface 6-51 has a total of three interfaces, namely, the second U-phase interface, the second V-phase interface and the second W-phase interface. That is to say, the variable frequency heat pump interface 6-51 and the variable frequency heat pump drive module 6-4 can be connected through three wires, and the variable frequency heat pump interface 6-51 and the variable frequency heat pump 6-5 can be connected through three wires. This further illustrates that compared with the relevant technology, this embodiment can use fewer wires to achieve the connection between the variable frequency heat pump drive module 6-4 and the variable frequency heat pump 6-5, which can effectively reduce costs.

[0347] In one embodiment of the present application, as shown in FIG6 , the control board includes a variable frequency fan interface 6 - 31 , which is integrated into the main control board 6 - 1 , and is used to connect the variable frequency fan drive module 6 - 2 and the variable frequency fan 6 - 3 .

[0348] It can be understood that integrating the variable frequency fan interface 6-31 into the main control board 6-1 improves the integration of the main control board 6-1, and connecting the variable frequency fan 6-3 to the variable frequency fan interface 6-31 can realize the connection between the variable frequency fan 6-3 and the variable frequency fan drive module 6-2.

[0349] Illustratively, the variable frequency fan 6-3 is detachably connected to the variable frequency fan interface 6-31, so as to facilitate the disassembly and assembly of the variable frequency fan 6-3 and the replacement of the variable frequency fan 6-3.

[0350] In an embodiment of the present application, the variable frequency fan interface 6-31 includes a third U-phase interface, a third V-phase interface and a third W-phase interface. The third U-phase interface is used to connect the variable frequency fan drive module 6-2 and the U-phase connection end of the variable frequency fan 6-3, the third V-phase interface is used to connect the variable frequency fan drive module 6-2 and the V-phase connection end of the variable frequency fan 6-3, and the third W-phase interface is used to connect the variable frequency fan drive module 6-2 and the W-phase interface of the variable frequency fan 6-3.

[0351] It can be understood that the variable frequency fan interface 6-31 has a total of three interfaces, namely the third U-phase interface, the third V-phase interface and the third W-phase interface. That is to say, the variable frequency fan interface 6-31 and the variable frequency fan drive module 6-2 can be connected through three wires, and the variable frequency fan interface 6-31 and the variable frequency fan 6-3 can be connected through three wires. This further shows that compared with the relevant technology, this embodiment can use fewer wires to achieve the connection between the variable frequency fan drive module 6-2 and the variable frequency fan 6-3, which can effectively reduce costs.

[0352] In one embodiment of the present application, as shown in Figure 6, the control board includes a high-voltage switch module 6-6, which is integrated in the main control board 6-1. The input end of the high-voltage switch module 6-6 is electrically connected to the control module 6-11, and the output end of the high-voltage switch module 6-6 is used to be electrically connected to the high-voltage switch. The high-voltage switch module 6-6 is used to detect the pressure at the high-voltage switch.

[0353] It can be understood that a high-voltage switch module 6-6 is integrated in the main control board 6-1, so that the main control board 6-1 can be connected to the high-voltage switch, thereby improving the integration of the main control board 6-1, and the high-voltage switch module 6-6 can detect the pressure at the high-voltage switch and transmit the detection data to the control module 6-11, so that the control module 6-11 can promptly know whether the pressure at the high-voltage switch exceeds the preset value.

[0354] In one embodiment of the present application, as shown in Figure 6, the control board includes a fifth optocoupler isolation module 6-7 and a sixth optocoupler isolation module 6-8, the fifth optocoupler isolation module 6-7 is arranged between the variable frequency heat pump drive module 6-4 and the control module 6-11, and the sixth optocoupler isolation module 6-8 is arranged between the variable frequency fan drive module 6-2 and the control module 6-11.

[0355] It can be understood that by providing the fifth optical coupling isolation module 6-7 between the variable frequency heat pump drive module 6-4 and the control module 6-11, and by providing the sixth optical coupling isolation module 6-8 between the variable frequency fan drive module 6-2 and the control module 6-11, the stability of the main control board 6-1 can be effectively improved.

[0356] It can be understood that when the variable frequency fan 6-3 is a high-voltage variable frequency fan 6-3, it is necessary to set the sixth optocoupler isolation module 6-8 between the variable frequency fan drive module 6-2 and the control module 6-11, and when the variable frequency heat pump 6-5 is a high-voltage variable frequency heat pump 6-5, it is necessary to set the fifth optocoupler isolation module 6-7 between the variable frequency heat pump drive module 6-4 and the control module 6-11.

[0357] The high-voltage inverter fan 6-3 and high-voltage inverter heat pump 6-5 use a 220V or 110V AC mains power supply, which is rectified to 310V DC. This means the voltage applied to the motor windings is a non-isolated 310V DC. Therefore, optocoupler isolation is required for communication.

[0358] When variable frequency fan 6-3 is a low-voltage variable frequency fan 6-3 and variable frequency heat pump 6-5 is a low-voltage variable frequency heat pump 6-5, the fifth optocoupler isolation module 6-7 and the sixth optocoupler isolation module 6-8 may not be provided. A low-voltage variable frequency solution uses AC220 or 110V mains power, which, after passing through an isolating switch power supply, outputs a low-voltage isolated power supply, such as 36V or 24V. The fan or heat pump used is a low-voltage motor, and since the voltage is isolated, optocoupler isolation is not required.

[0359] In one embodiment of the present application, the control board includes a heater module 6-9, which is integrated into the main control board 6-1. The input end of the heater module 6-9 is electrically connected to the control module 6-11, and the output end of the heater module 6-9 is electrically connected to the heater.

[0360] It can be understood that the heater module 6-9 is integrated in the main control board 6-1, so that the main control board 6-1 can be connected to the heater through the heater module 6-9 and control the operation of the heater, thereby improving the integration of the main control board 6-1.

[0361] According to an embodiment of the present application, the water heater includes a variable frequency fan 6-3, a variable frequency heat pump 6-5 and the above-mentioned control board. The variable frequency fan 6-3 is electrically connected to the variable frequency fan drive module 6-2, and the variable frequency heat pump 6-5 is electrically connected to the variable frequency heat pump drive module 6-4.

[0362] According to the water heater of the embodiment of the present application, it has a control board. By integrating at least one of the variable frequency fan drive module 6-2 and the variable frequency heat pump drive module 6-4 into the main control board 6-1, the volume of at least one of the fan and the heat pump can be effectively reduced, and the heat dissipation cost can be effectively reduced.

[0363] In one embodiment of the present application, as shown in FIG5 and FIG6, a first distance is provided between the control board and the variable frequency fan 6-3, and a second distance is provided between the control board and the variable frequency heat pump 6-5.

[0364] It can be understood that setting the control board at a distance from the variable frequency fan 6-3 and the variable frequency heat pump 6-5 reduces the mutual influence between the heat generated by the control board during operation and the heat generated by the variable frequency fan 6-3 and the variable frequency heat pump 6-5, thereby ensuring the heat dissipation efficiency of the control board and the heat dissipation efficiency of the variable frequency fan 6-3 and the variable frequency heat pump 6-5.

[0365] It can be understood that the first spacing and the second spacing can be the same or different.

[0366] Finally, it should be noted that the above embodiments are intended only to illustrate the present application and are not intended to limit the present application. Although the present application has been described in detail with reference to the embodiments, those skilled in the art should understand that various combinations, modifications, or equivalent substitutions of the technical solutions of the present application do not depart from the scope of the technical solutions of the present application and should be encompassed by the claims of the present application.

Claims

1. A control panel, comprising: Main control module, fan drive module and heat pump drive module; The fan drive module includes a variable frequency fan drive module and a fixed frequency fan relay module, and the fan drive module is connected to the main control module, and is used to drive the variable frequency fan or the fixed frequency fan to operate according to the control instruction of the main control module; The heat pump driving module includes a variable frequency heat pump driving module and a fixed frequency heat pump relay module, and the heat pump driving module is connected to the main control module and is used to drive the variable frequency heat pump or the fixed frequency heat pump to operate according to the control instructions of the main control module.

2. The control panel according to claim 1, wherein: The control panel is arranged outside the variable frequency fan, the variable frequency heat pump, the fixed frequency fan and the fixed frequency heat pump.

3. The control panel according to claim 1 or 2, further comprising: Variable frequency fan interface and variable frequency heat pump interface; The variable frequency fan drive module is connected to the three-phase motor of the variable frequency fan through the variable frequency fan interface; The variable frequency heat pump driving module is connected to the three-phase motor of the variable frequency heat pump through the variable frequency heat pump interface.

4. The control panel according to claim 3, wherein: The variable frequency fan drive module communicates with the main control module via a universal asynchronous receiver / transmitter, or a bidirectional two-wire synchronous serial bus, or a serial peripheral interface; The variable frequency heat pump drive module communicates with the main control module via a universal asynchronous receiver / transmitter, or a bidirectional two-wire synchronous serial bus, or a serial peripheral interface.

5. The control panel according to any one of claims 1 to 4, further comprising: Fixed frequency fan interface and fixed frequency heat pump interface; The fixed-frequency fan relay module is connected to the fixed-frequency fan through the fixed-frequency fan interface; The fixed-frequency heat pump relay module is connected to the fixed-frequency heat pump through the fixed-frequency heat pump interface.

6. The control panel according to any one of claims 1 to 5, further comprising: A switching power supply module, a first optical coupling isolation module and a second optical coupling isolation module; The variable frequency fan is a high-pressure variable frequency fan, and the variable frequency heat pump is a high-pressure variable frequency heat pump; The first end of the switching power supply module is connected to the mains, the second end of the switching power supply module is isolatedly connected to the main control module, and the third end of the switching power supply module is non-isolatedly connected to the variable frequency fan drive module and the variable frequency heat pump drive module; The first optical coupling isolation module is connected between the variable frequency fan drive module and the main control module; The second optical coupling isolation module is connected between the variable frequency heat pump driving module and the main control module.

7. The control panel according to any one of claims 1 to 6, further comprising: Switching power supply module; The variable frequency fan is a low-voltage variable frequency fan, and the variable frequency heat pump is a low-voltage variable frequency heat pump; The first end of the switching power module is connected to the mains, the second end of the switching power module is isolated and connected to the main control module, and the third end of the switching power module is isolated and connected to the variable frequency fan drive module and the variable frequency heat pump drive module.

8. The control panel according to any one of claims 1 to 7, further comprising: Electronic anode drive module and electronic anode interface; The first end of the electronic anode driving module is connected to the main control module, and the second end of the electronic anode driving module is connected to the electronic anode through the electronic anode interface.

9. The control panel according to any one of claims 6 to 8, further comprising: Leakage detection module, current detection module, sensor drive module, high-voltage switch drive module, display board communication module, sensor interface and high-voltage switch interface; The leakage detection module is connected between the switching power supply module and the mains; The current detection module is connected between the leakage detection module and the mains; The first end of the sensor driving module is connected to the main control module, and the second end of the sensor driving module is connected to temperature sensors at different positions through the sensor interface; The first end of the high-voltage switch driving module is connected to the main control module, and the second end of the high-voltage switch driving module is connected to the high-voltage switch through the high-voltage switch interface; The first end of the display panel communication module is connected to the main control module, and the second end of the display panel communication module is connected to the display panel.

10. A water heater, comprising: A variable frequency fan, a fixed frequency fan, a variable frequency heat pump, a fixed frequency heat pump, an electronic anode, a temperature sensor, a high voltage switch, a display panel, and a control panel as claimed in any one of claims 1 to 9.

11. A driving method, comprising: Control the main control module to send a variable frequency fan control signal to the variable frequency fan drive module; Controlling the variable frequency fan driving module to amplify the variable frequency fan control signal to obtain a variable frequency fan amplified signal; Controlling the variable frequency fan driving module to send the variable frequency fan amplified signal to the variable frequency fan; Controlling the variable frequency fan to operate according to the variable frequency fan amplified signal; or The control main control module sends a fixed-frequency fan control signal to the fixed-frequency fan relay module; The fixed-frequency fan relay module is controlled to close according to the fixed-frequency fan control signal to drive the fixed-frequency fan to operate.

12. The driving method according to claim 11, further comprising: Control the main control module to send a variable frequency heat pump control signal to the variable frequency heat pump drive module; Controlling the variable frequency heat pump driving module to amplify the variable frequency heat pump control signal to obtain a variable frequency heat pump amplified signal; Controlling the variable frequency heat pump driving module to send the variable frequency heat pump amplified signal to the variable frequency heat pump; Controlling the variable frequency heat pump to operate according to the variable frequency heat pump amplified signal; or The control main control module sends a fixed-frequency heat pump control signal to the fixed-frequency heat pump relay module; The fixed-frequency heat pump relay module is controlled to close according to the fixed-frequency heat pump control signal to drive the fixed-frequency heat pump to operate.

13. A control panel comprising: Main control module, fixed frequency fan relay module and variable frequency heat pump drive module; The fixed-frequency fan relay module is connected to the main control module and is used to drive the fixed-frequency fan to operate according to the control instructions of the main control module; The variable frequency heat pump driving module is connected to the main control module and is used to drive the variable frequency heat pump to operate according to the control instructions of the main control module; The control panel is arranged outside the fixed-frequency fan and the variable-frequency heat pump.

14. The control panel according to claim 13, further comprising: Variable frequency heat pump interface; The variable frequency heat pump driving module is connected to the three-phase motor of the variable frequency heat pump through the variable frequency heat pump interface.

15. The control panel according to claim 14, wherein: The variable frequency heat pump drive module communicates with the main control module via a universal asynchronous receiver / transmitter, or a bidirectional two-wire synchronous serial bus, or a serial peripheral interface.

16. The control panel according to any one of claims 13 to 15, further comprising: Fixed frequency fan interface; The fixed-frequency fan relay module is connected to the fixed-frequency fan through the fixed-frequency fan interface.

17. The control panel according to any one of claims 13 to 16, further comprising: Switching power supply module and third optical coupler isolation module; The variable frequency heat pump is a high-voltage variable frequency heat pump; The first end of the switching power supply module is connected to the mains, the second end of the switching power supply module is isolatedly connected to the main control module, and the third end of the switching power supply is non-isolatedly connected to the variable frequency heat pump drive module; The third optical coupling isolation module is connected between the variable frequency heat pump driving module and the main control module.

18. The control panel according to any one of claims 13 to 17, further comprising: Switching power supply module; The variable frequency heat pump is a low-voltage variable frequency heat pump; The first end of the switching power supply module is connected to the mains, the second end of the switching power supply module is isolated and connected to the main control module, and the third end of the switching power supply is isolated and connected to the variable frequency heat pump drive module.

19. The control panel according to any one of claims 13 to 18, further comprising: Electronic expansion valve drive module and electronic expansion valve interface; The first end of the electronic expansion valve driving module is connected to the main control module, and the second end of the electronic expansion valve driving module is connected to the electronic expansion valve through the electronic expansion valve interface.

20. The control panel according to any one of claims 17 to 19, further comprising: Leakage detection module, current detection module, sensor drive module, high-voltage switch drive module, display board communication module, sensor interface and high-voltage switch interface; The leakage detection module is connected between the switching power supply module and the mains; The current detection module is connected between the leakage detection module and the mains; The first end of the sensor driving module is connected to the main control module, and the second end of the sensor driving module is connected to temperature sensors at different positions through the sensor interface; The first end of the high-voltage switch driving module is connected to the main control module, and the second end of the high-voltage switch driving module is connected to the high-voltage switch through the high-voltage switch interface; The first end of the display panel communication module is connected to the main control module, and the second end of the display panel communication module is connected to the display panel.

21. A water heater comprising the control panel according to any one of claims 13 to 20.

22. The water heater according to claim 21, further comprising: Fixed frequency fan, variable frequency heat pump, electronic expansion valve, temperature sensor, high voltage switch and display panel.

23. A control panel comprising: A main control board, wherein the main control board is provided with a control module; A variable frequency fan drive module is integrated in the main control board, the input end of the variable frequency fan drive module is electrically connected to the first output end of the control module, and the output end of the variable frequency fan drive module is electrically connected to the variable frequency fan; A fixed-frequency heat pump switch module, wherein the input end of the fixed-frequency heat pump switch module is electrically connected to the second output end of the control module, and the output end of the fixed-frequency heat pump switch module is electrically connected to the fixed-frequency heat pump.

24. The control panel of claim 23, wherein: The fixed-frequency heat pump switch module is integrated into the main control board.

25. A control panel according to claim 23 or 24, wherein: The variable frequency fan driving module is communicatively connected with the control module via at least one of a serial interface uart, a bidirectional serial data transmission interface I2C, and a serial peripheral interface SPI.

26. The control panel of claim 25, wherein: The control board includes a variable frequency fan interface, which is integrated with the main control board and is used to connect the variable frequency fan drive module and the variable frequency fan.

27. The control panel of claim 26, wherein: The variable frequency fan interface includes a first U-phase interface, a first V-phase interface and a first W-phase interface. The first U-phase interface is used to connect the variable frequency fan drive module with the U-phase connection end of the variable frequency fan, the first V-phase interface is used to connect the variable frequency fan drive module with the V-phase connection end of the variable frequency fan, and the first W-phase interface is used to connect the variable frequency fan drive module with the W-phase interface of the variable frequency fan.

28. A control panel according to any one of claims 23 to 27, wherein: The control board comprises a fixed-frequency heat pump interface, which is integrated with the main control board and is used to connect the fixed-frequency heat pump switch module with the fixed-frequency heat pump.

29. A control panel according to any one of claims 23 to 28, wherein: The control board includes a fourth optical coupling isolation module, and the fourth optical coupling isolation module is arranged between the variable frequency fan driving module and the control module.

30. A control panel according to any one of claims 23 to 29, wherein: The control panel includes a PV module, the PV module is integrated with the main control panel, and the PV module is used to connect the control module and the power grid.

31. A water heater, comprising: A variable frequency fan, a fixed frequency heat pump and a control board as described in any one of claims 23 to 30, wherein the variable frequency fan is electrically connected to the variable frequency fan drive module, and the fixed frequency heat pump is electrically connected to the fixed frequency heat pump switch module.

32. The water heater according to claim 31, wherein: The control panel is arranged in a space outside the variable frequency fan, and the control panel is arranged in a space outside the fixed frequency heat pump; and / or, The fixed-frequency heat pump switch module is arranged in a space outside the variable-frequency fan, and the fixed-frequency heat pump switch module is arranged in a space outside the fixed-frequency heat pump.

33. A control panel comprising: A main control board, wherein the main control board is provided with a control module; A variable frequency fan drive module, wherein the input end of the variable frequency fan drive module is electrically connected to the first output end of the control module, and the output end of the variable frequency fan drive module is electrically connected to the variable frequency fan; A variable frequency heat pump drive module, wherein the input end of the variable frequency heat pump drive module is electrically connected to the second output end of the control module, and the output end of the variable frequency heat pump drive module is electrically connected to the variable frequency heat pump; At least one of the variable frequency fan drive module and the variable frequency heat pump drive module is integrated into the Describe the main control board.

34. The control panel of claim 33, wherein: At least one of the variable frequency fan drive module and the variable frequency heat pump switch module is communicatively connected to the control module via at least one of a serial interface uart, a bidirectional serial data transmission interface I2C, or a serial peripheral interface SPI.

35. A control panel according to claim 33 or 34, wherein: The control board comprises a variable frequency heat pump interface, which is integrated in the main control board and is used to connect the variable frequency heat pump drive module and the variable frequency heat pump.

36. The control panel of claim 35, wherein: The variable frequency heat pump interface includes a second U-phase interface, a second V-phase interface and a second W-phase interface, the second U-phase interface is used to connect the variable frequency heat pump drive module with the U-phase connection end of the variable frequency heat pump, the second V-phase interface is used to connect the variable frequency heat pump drive module with the V-phase connection end of the variable frequency heat pump, and the second W-phase interface is used to connect the variable frequency heat pump drive module with the W-phase interface of the variable frequency heat pump.

37. The control panel of claim 33, wherein: The control board includes a variable frequency fan interface, which is integrated with the main control board and is used to connect the variable frequency fan drive module and the variable frequency fan.

38. The control panel of claim 37, wherein: The variable frequency fan interface includes a third U-phase interface, a third V-phase interface and a third W-phase interface. The third U-phase interface is used to connect the variable frequency fan drive module with the U-phase connection end of the variable frequency fan, the third V-phase interface is used to connect the variable frequency fan drive module with the V-phase connection end of the variable frequency fan, and the third W-phase interface is used to connect the variable frequency fan drive module with the W-phase interface of the variable frequency fan.

39. A control panel according to any one of claims 33 to 38, wherein: The control panel comprises: A high-voltage switch module, the high-voltage switch module is integrated in the main control board, the input end of the high-voltage switch module is electrically connected to the control module, the output end of the high-voltage switch module is used to be electrically connected to the high-voltage switch, and the high-voltage switch module is used to detect the pressure at the high-voltage switch; and / or, A fifth optocoupler isolation module and a sixth optocoupler isolation module, wherein the fifth optocoupler isolation module is arranged between the variable frequency heat pump drive module and the control module, and the sixth optocoupler isolation module is arranged between the variable frequency fan drive module and the control module.

40. A control panel according to any one of claims 33 to 38, wherein: The control board includes a heater module, which is integrated with the main control board. An input end of the heater module is electrically connected to the control module, and an output end of the heater module is electrically connected to a heater.

41. A water heater, comprising a variable frequency fan, a variable frequency heat pump and a control board as described in any one of claims 33 to 40, wherein the variable frequency fan is electrically connected to the variable frequency fan drive module, and the variable frequency heat pump is electrically connected to the variable frequency heat pump drive module.

42. The water heater according to claim 41, wherein: A first distance is set between the control board and the variable frequency fan, and a second distance is set between the control board and the variable frequency heat pump.

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