WO2022127008A1

WO2022127008A1 - Device for controlling air conditioner, and air conditioner

Info

Publication number: WO2022127008A1
Application number: PCT/CN2021/092863
Authority: WO
Inventors: 文先仕
Original assignee: 广东美的制冷设备有限公司; 美的集团股份有限公司
Priority date: 2020-12-17
Filing date: 2021-05-10
Publication date: 2022-06-23
Also published as: CN213693503U

Abstract

A device for controlling an air conditioner, and an air conditioner. The device for controlling an air conditioner comprises: a circuit substrate (100); a power converter module (103); intelligent power modules, the intelligent power modules being electrically connected to the power converter module (103) by means of the circuit substrate (100); a heat dissipation assembly (104), the power converter module (103) and the intelligent power modules being located between the heat dissipation assembly (104) and the circuit substrate (100), and the heat dissipation assembly (104) being arranged close to the center of the circuit substrate (100); and inductor elements (105) and electrolytic capacitors (106), the inductor elements (105) and the electrolytic capacitors (106) being electrically connected to the power converter module (103) by means of the circuit substrate (100), the inductor elements (105) and the electrolytic capacitors (106) being respectively located on two sides of the heat dissipation assembly (104), and the power converter module (103), the intelligent power modules, the inductor elements (105), and the electrolytic capacitors (106) being all arranged on the circuit substrate (100).

Description

Air conditioner controls and air conditioners

CROSS-REFERENCE TO RELATED APPLICATIONS

This application claims the priority of the Chinese patent application with application number 202023058192.1 and titled "Control Device for Air Conditioner and Air Conditioner" filed on December 17, 2020, the entire contents of which are incorporated herein by reference.

technical field

The present disclosure relates to the technical field of air conditioner control, and in particular, to a control device of an air conditioner and an air conditioner.

Background technique

The control device of the air conditioner is usually constructed by a combination of discrete power devices such as a rectifier bridge, a PFC (Power Factor Correction) drive component, a compressor IPM (Intelligent Power Module) single module, and a fan IPM single module. made. In the existing solution, two-level active PFC drive components are generally used. On the one hand, the switching tube will suffer from excessive voltage, low switching frequency, large inductance, and large heat generation. On the other hand, it is not considered. The wiring design between the devices on the substrate leads to complicated circuit connections, resulting in a long current loop, which is not conducive to the distinction between power flow and signal flow, and is prone to electromagnetic interference, which affects the EMC (electromagnetic compatibility) performance of the control device. In addition, the irregular arrangement of devices on the substrate can easily lead to the deformation of PCBA (Printed Circuit Board Assembly, which refers to the entire process of the empty PCB board going through the upper part or the plug-in, referred to as PCBA).

SUMMARY OF THE INVENTION

The present disclosure aims to solve one of the technical problems existing in the prior art at least to a certain extent.

To this end, an object of the present disclosure is to provide a control device for an air conditioner.

Another object of the present disclosure is to provide an air conditioner.

A control device for an air conditioner according to an embodiment of the first aspect of the present disclosure includes:

circuit substrate;

Power conversion module;

an intelligent power module, which is electrically connected to the power conversion module through the circuit substrate;

a heat dissipation assembly, the power conversion module and the intelligent power module are both located between the heat dissipation assembly and the circuit substrate, and the heat dissipation assembly is disposed close to the center of the circuit substrate;

An inductance element and an electrolytic capacitor are electrically connected to the power conversion module through the circuit substrate, and the inductance element and the electrolytic capacitor are located on both sides of the heat dissipation assembly, respectively. The power conversion module, the intelligent power module, the inductance element and the electrolytic capacitor are all arranged on the circuit substrate.

A control device for an air conditioner according to an embodiment of the present disclosure has at least the following beneficial effects: the power conversion module and the intelligent power module are arranged between the circuit substrate and the heat dissipation assembly, and the inductance element and the electrolytic capacitor are respectively disposed on the two sides of the heat dissipation assembly. When the PCB is wired, the wiring can be performed in the order of power supply, which simplifies the wiring design of the control device, reduces the loop area of the current in the line, can distinguish the power flow and the signal flow, and reduces the power conversion module. The electromagnetic interference of the device can improve the EMC performance of the control device; while realizing the control function of the air conditioner, the devices in the control device can be more reasonably arranged to avoid PCBA deformation, which is conducive to improving production and assembly. efficiency and reduce the occupied space of the control device.

According to some embodiments of the present disclosure, the power conversion module includes a package and a first switch tube, a second switch tube, a third switch tube, a fourth switch tube, a fifth switch tube, The sixth switch tube, the first diode, the second diode, the third diode, the fourth diode, the fifth diode and the sixth diode, the power conversion module is a three-level rectifier. Stream boost module.

According to some embodiments of the present disclosure, the first switch transistor, the second switch transistor, the third switch transistor, the fourth switch transistor, the fifth switch transistor, and the sixth switch transistor are One side edge of the package is arranged, the first diode, the second diode, the third diode, the fourth diode, the fifth diode and the The sixth diode is arranged along the other side edge of the package.

According to some embodiments of the present disclosure, the power conversion module further includes an AC input terminal and a DC output terminal, the AC input terminal includes a first input terminal, a second input terminal and a third input terminal, and the DC output terminal includes The first output terminal, the second output terminal and the third output terminal, the drain of the first switch tube, the anode of the first diode and the cathode of the second diode are all connected to the first output terminal. The input terminal is connected, the drain of the third switch tube, the anode of the third diode, and the cathode of the fourth diode are all connected to the second input terminal, and the fifth switch tube is connected to the second input terminal. The drain, the anode of the fifth diode and the cathode of the sixth diode are all connected to the third input terminal, and the cathode of the first diode and the cathode of the third diode are all connected to the third input terminal. The negative electrode and the negative electrode of the fifth diode are both connected to the first output end, the drain of the second switch tube, the drain of the fourth switch tube and the drain of the sixth switch tube are connected to the second output terminal, the anode of the second diode, the anode of the fourth diode and the anode of the sixth diode are all connected to the third output terminal, so The source of the first switch is connected to the source of the second switch, the source of the third switch is connected to the source of the fourth switch, and the source of the fifth switch is connected to the source of the sixth switch tube.

According to some embodiments of the present disclosure, the intelligent power module includes a first power module and a second power module, the first power module includes a first motor drive circuit, the second power module includes a second motor drive circuit, Both the first output terminal and the third output terminal are connected to the input terminal of the first motor drive circuit, and the second output terminal and the third output terminal are both connected to the input terminal of the second motor drive circuit. input connection.

According to some embodiments of the present disclosure, the first power module and the second power module are located on two sides of the power conversion module, respectively;

or,

the first power module and the power conversion module are respectively located on both sides of the second power module;

or

The second power module and the power conversion module are respectively located on both sides of the first power module.

According to some embodiments of the present disclosure, the control device of the air conditioner further includes a first motor interface and a second motor interface provided on the circuit substrate, the first motor interface and the first motor drive circuit The second motor interface is connected to the output end of the second motor drive circuit, the first motor interface is arranged close to the output end of the first motor drive circuit, and the second motor interface is close to the output end of the first motor drive circuit. The output terminal of the second motor drive circuit is set.

According to some embodiments of the present disclosure, the electrolytic capacitor includes a first capacitor and a second capacitor, a positive electrode of the first capacitor is connected to the first output terminal, and a negative electrode of the second capacitor is connected to the third output terminal, the negative pole of the first capacitor and the positive pole of the second capacitor are both connected to the second output terminal.

According to some embodiments of the present disclosure, the control device for the air conditioner further includes a power input interface disposed on the circuit substrate, the inductance element includes a first inductance, a second inductance and a third inductance, the first inductance One end of the inductance is connected to the first input end, one end of the second inductance is connected to the second input end, one end of the third inductance is connected to the third input end, and the first end of the inductance is connected to the third input end. The other end, the other end of the second inductor and the other end of the third inductor are all connected to the power input interface.

According to some embodiments of the present disclosure, the AC input terminal and the DC output terminal are respectively disposed on two sides of the package, the first inductor is disposed close to the first input terminal, and the second inductor is disposed The third inductor is disposed close to the third input end, and the electrolytic capacitor is disposed close to the DC output end.

According to some embodiments of the present disclosure, the control device of the air conditioner further includes a switching power supply module disposed on the circuit substrate, the switching power supply module is connected to the power input interface, and the switching power supply module is close to the The input end of the intelligent power module and the input end of the power conversion module are arranged.

According to some embodiments of the present disclosure, the control device of the air conditioner further includes a control chip disposed on the circuit substrate, and the power conversion module, the intelligent power module and the switching power supply module are all related to the control chip. The chips are electrically connected, and the control chip is arranged close to the input end of the intelligent power module.

According to some embodiments of the present disclosure, the control device of the air conditioner further includes a plurality of control components disposed on the circuit substrate, the control components are connected to the control chip, and the control components are close to the control chip set up.

An air conditioner according to an embodiment of the second aspect of the present disclosure, comprising:

cooling device;

A control device for an air conditioner as defined in the embodiments of the first aspect above, the control device for the air conditioner is disposed close to the heat dissipation device;

Wherein, the heat dissipation device is an air-cooled heat sink or a refrigerant pipe of a refrigerant circulation system.

An air conditioner according to an embodiment of the present disclosure has at least the following beneficial effects: arranging the control device close to the heat dissipation device, and radiating heat from the control device through the heat dissipation device, is beneficial to improve the heat dissipation efficiency of the control device and ensure the normal operation of the control device. run.

Additional aspects and advantages of the present disclosure will be set forth, in part, from the following description, and in part will become apparent from the following description, or may be learned by practice of the present disclosure.

Description of drawings

The above and/or additional aspects and advantages of the present disclosure will become apparent and readily understood from the following description of embodiments taken in conjunction with the accompanying drawings, wherein:

FIG. 1 is a schematic diagram of device layout of a control device of an air conditioner provided by an embodiment of the present disclosure;

2 is a schematic diagram of a circuit connection of a control device of an air conditioner according to an embodiment of the present disclosure;

3 is a schematic diagram of the layout of diodes and switch tubes of a power conversion module according to an embodiment of the present disclosure;

4 is a schematic diagram of a layout of a power conversion module, a first power module, and a second power module according to an embodiment of the present disclosure;

FIG. 5 is another schematic layout diagram of a power conversion module, a first power module, and a second power module according to an embodiment of the present disclosure;

FIG. 6 is another schematic diagram of layout of a power conversion module, a first power module, and a second power module according to an embodiment of the present disclosure;

FIG. 7 is a schematic diagram of an air conditioner according to an embodiment of the present disclosure.

Among them, the corresponding relationship between the reference numerals and the component names in Fig. 1 to Fig. 7 is:

100 circuit substrate, 101 first power module, 102 second power module, 103 power conversion module, 104 heat dissipation component, 105 inductance element, 106 electrolytic capacitor, 107 first motor interface, 108 second motor interface, 109 power input interface, 110 control chip, 111 switching power supply module, 112 control component, 1031 package, 300 air conditioner, 301 heat sink, D1 first diode, D2 second diode, D3 third diode, D4 fourth second Diode, D5 fifth diode, D6 sixth diode, T1 first switch, T2 second switch, T3 third switch, T4 fourth switch, T5 fifth switch, T6 sixth Switch tube, L1 first inductance, L2 second inductance, L3 third inductance, C1 first capacitor, C2 second capacitor, A, B, C respectively represent the A phase, B phase, and C phase of the three-phase alternating current, N represents The neutral line of three-phase alternating current, P1 first input, P2 second input, P3 third input, Q1 first output, Q2 second output, Q3 third output, M1 first motor, M2 first Two motors.

Detailed ways

Embodiments of the present disclosure are described in detail below, examples of which are illustrated in the accompanying drawings, wherein the same or similar reference numerals refer to the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present disclosure and should not be construed as a limitation of the present disclosure.

As shown in FIG. 1 , a control device for an air conditioner according to an embodiment of the present disclosure includes:

Circuit substrate 100:

a power conversion module 103;

an intelligent power module, the intelligent power module is electrically connected to the power conversion module 103 through the circuit substrate 100;

The heat dissipation assembly 104, the power conversion module 103 and the intelligent power module are all located between the heat dissipation assembly 104 and the circuit substrate 100, and the heat dissipation assembly 104 is disposed close to the center of the circuit substrate 100;

The inductive element 105 and the electrolytic capacitor 106 are electrically connected to the power conversion module 103 through the circuit substrate 100. The inductive element 105 and the electrolytic capacitor 106 are located on both sides of the heat dissipation component 104, respectively. The power conversion module 103, the intelligent The power module, the inductance element 105 and the electrolytic capacitor 106 are all disposed on the circuit substrate 100 .

In this embodiment, the power conversion module 103 and the intelligent power module are disposed between the circuit substrate 100 and the heat dissipation assembly 104 (FIG. 1 is a top view of the control device, and the heat dissipation assembly 104, the power conversion module 103 and the intelligent power module are not shown). It should be noted that the heat dissipation component 104 is arranged on the power conversion module 103 and the intelligent power module), and the inductance element 105 and the electrolytic capacitor 106 are respectively arranged on both sides of the heat dissipation component 104. When performing PCB wiring, you can Wiring according to the power supply sequence simplifies the wiring design of the control device, reduces the loop area of the current in the line, can distinguish the power flow and the signal flow, and reduces the electromagnetic interference of the power conversion module 103 to other devices in the control device, thereby improving the Improve the EMC performance of the control device; while realizing the control function of the air conditioner, the components in the control device can be more reasonably arranged to avoid PCBA deformation, which is conducive to improving the efficiency of production and assembly and reducing the control device. occupied space.

It can be understood that the power conversion module 103, the intelligent power module and the heat dissipation component 104 are arranged in the middle of the circuit substrate 100, and the inductance element 105 and the electrolytic capacitor 106 are respectively arranged on both sides of the heat dissipation component 104, so that the power conversion module 103, the intelligent The weight of the power module and the heat dissipation component 104 is distributed in the middle area of the circuit substrate 100, the weight of the inductance element 105 and the electrolytic capacitor 106 are distributed on both sides of the circuit substrate 100 respectively, the weight distribution is relatively uniform, and the heat dissipation component 104 is in the middle as the long center, The circuit substrate 100 is not easy to bend during transportation, drop, and vibration test, so as to avoid PCBA deformation.

It can be understood that the heat dissipation component 104 covers the surface of the smart power module away from the circuit substrate 100 and the surface of the power conversion module 103 away from the circuit substrate 100, so that the smart power module and the power conversion module 103 can be dissipated.

In some examples, the heat dissipation assembly 104 includes a first heat dissipation assembly 104 and a second heat dissipation assembly 104. The first heat dissipation assembly 104 covers a surface of the smart power module on one side away from the circuit substrate 100, and the second heat dissipation assembly 104 covers the power conversion module. 103 is far away from the side surface of the circuit substrate 100 , which can also realize heat dissipation for the intelligent power module and the power conversion module 103 .

According to the embodiments of the present disclosure, the specific material of the circuit substrate 100 is not particularly limited, and those skilled in the art can select it according to actual needs. According to a specific example of the present disclosure, in order to further improve the heat dissipation performance of the circuit substrate 100, the circuit substrate 100 may use a ceramic substrate or a metal substrate with an insulating layer (for example, an aluminum substrate or a copper substrate, etc.), wherein the insulating layer may be 70- The common high thermal conductivity material with a thickness of 150 μm can further facilitate the heat dissipation of each device on the circuit substrate 100 , thereby ensuring the overall stability and service life of the control device. At the same time, each device on the circuit substrate 100 can be a bare chip, and the electrical connection can be realized through the copper wiring and external metal binding wires adapted on the circuit substrate 100, which can further facilitate the connection of each device on the circuit substrate 100. Dissipate heat to ensure the overall stability and service life of the control device.

As shown in FIG. 3 , it can be understood that, in the above embodiment, the power conversion module 103 includes a package 1031 and a first switch tube T1 , a second switch tube T2 , and a third switch tube T3 arranged in the package member 1031 . , the fourth switch tube T4, the fifth switch tube T5, the sixth switch tube T6, the first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the fifth and second diodes The pole tube D5 and the sixth diode D6, the power conversion module 103 is a three-level rectification and boosting module.

In this embodiment, the power conversion module 103 includes six switch tubes, six diodes, and a package 1031, and the six switch tubes and six diodes can be distributed in the package 1031, which is more conducive to heat dissipation and enables the power conversion module The stability of each element in 103 is better, thereby improving the reliability and stability of the control device.

In this embodiment, a three-level rectification and boosting module is used for power conversion, which reduces the voltage experienced by the switching tube when switching, increases the switching frequency of the switching tube, reduces the volume of the inductance and reduces the heating of the control device.

It can be understood that the power conversion module 103 can be an integrated module or a modular circuit constructed by discrete components. In the embodiment of the present disclosure, the integrated module packaged by the package 1031 is beneficial to the miniaturization design of the power conversion module 103. Thus, the volume of the control device is reduced.

As shown in FIG. 3 , it can be understood that in the above embodiment, the first switch transistor T1 , the second switch transistor T2 , the third switch transistor T3 , the fourth switch transistor T4 , the fifth switch transistor T5 and the sixth switch transistor The tube T6 is disposed along one side edge of the package 1031, the first diode D1, the second diode D2, the third diode D3, the fourth diode D4, the fifth diode D5 and the sixth diode The tube D6 is arranged along the other side edge of the package 1031 .

In this embodiment, six switch tubes are arranged in a row along one side edge of the package 1031, and six diodes are arranged in a row along the other side edge of the package 1031. This arrangement has a small driving loop and can drive The circuit has strong anti-interference ability and strong robustness.

In some examples, six diodes and six switches can be placed on the top or bottom side of the PCB.

As shown in FIG. 2, it can be understood that in the above embodiment, the power conversion module 103 further includes an AC input terminal and a DC output terminal, and the AC input terminal includes a first input terminal P1, a second input terminal P2 and a third input terminal Terminal P3, the DC output terminal includes a first output terminal Q1, a first output terminal Q2 and a first output terminal Q3, the drain of the first switch tube T1, the anode of the first diode D1 and the anode of the second diode D2. The negative poles are all connected to the first input terminal P1, the drain of the third switch tube T3, the positive pole of the third diode D3 and the negative pole of the fourth diode D4 are all connected to the second input terminal P2, and the fifth switch tube T5 The drain, the anode of the fifth diode D5 and the cathode of the sixth diode D6 are all connected to the third input terminal P3, the cathode of the first diode D1, the cathode of the third diode D3 and the fifth The cathode of the diode D5 is connected to the first output terminal Q1, the drain of the second switch tube T2, the drain of the fourth switch tube T4 and the drain of the sixth switch tube T6 are all connected to the first output terminal Q2, The anode of the second diode D2, the anode of the fourth diode D4 and the anode of the sixth diode D6 are all connected to the first output terminal Q3, and the source of the first switch T1 is connected to the second switch T2. The source is connected, the source of the third switch T3 is connected to the source of the fourth switch T4, and the source of the fifth switch T5 is connected to the source of the sixth switch T6.

In this embodiment, six switch tubes and six diodes are used to form a three-level rectifier boost circuit to replace the traditional rectifier bridge and PFC circuit, which is beneficial to reduce the complexity of the layout and wiring of the control device of the air conditioner. Improve the EMC performance of the control device and reduce the space occupied by the control device.

In this embodiment, the AC input terminal is used to input three-phase AC power, wherein the first input terminal P1 is used to connect to the A-phase AC power, the second input terminal P2 is used to connect to the B-phase AC power, and the third input terminal P3 is used to connect to the B-phase AC power. Connect to C-phase alternating current.

As shown in FIG. 1 , it can be understood that in the above embodiment, the intelligent power module includes a first power module 101 and a second power module 102 , the first power module 101 includes a first motor drive circuit, and the second power module 102 It includes a second motor drive circuit, the first output end Q1 and the first output end Q3 are both connected to the input end of the first motor drive circuit, the first output end Q2 and the first output end Q3 are both connected to the input end of the second motor drive circuit end connection.

It should be noted that the above-mentioned first power module 101 is a compressor power module, which is used to drive the compressor to run, and the second power module 102 is a fan power module, which is used to drive the fan to run. It is connected between the first output terminal Q1 and the first output terminal Q3. As shown in FIG. 2 , the motor to be driven includes a first motor M1 and a second motor M2 , and the first motor M1 and the second motor M2 are respectively a compressor and a fan.

As shown in FIGS. 4 , 5 and 6 , it can be understood that, in the above embodiment, the first power module 101 and the second power module 102 are located on both sides of the power conversion module 103 respectively;

or,

The first power module 101 and the power conversion module 103 are respectively located on both sides of the second power module 102;

or

The second power module 102 and the power conversion module 103 are respectively located on both sides of the first power module 101 .

In this embodiment, since the connecting lines between the power conversion module 103 and the first power module 101 and the second power module 102 are relatively thick, and there is high-frequency pulsation, the longer the wiring, the larger the occupied area, and the more sensitive the surrounding circuits are. The greater the impact, the principle of arrangement is that the shorter the trace, the better. 4 , 5 and 6 respectively show three situations in which the power conversion module 103 , the first power module 101 and the second power module 102 are arranged. In this embodiment of the present disclosure, the power conversion module 103 , the first power module 101 , and the second power module 102 are arranged side by side under the heat dissipation assembly 104 , which not only considers the design of the wiring between the three modules, but also considers the heat dissipation assembly 104 . While taking into account the miniaturized design of the control device, the size and area are optimized, and the wiring is optimized to the maximum extent, and the EMC performance of the control device is improved.

As shown in FIG. 1 , it can be understood that in the above-mentioned embodiment, the control device of the air conditioner further includes a first motor interface 107 and a second motor interface 108 provided on the circuit substrate 100 , and the first motor interface 107 is connected to the first motor interface 107 The output end of the motor drive circuit is connected, the second motor interface 108 is connected to the output end of the second motor drive circuit, the first motor interface 107 is arranged close to the output end of the first motor drive circuit, and the second motor interface 108 is close to the second motor drive circuit The output of the circuit is set.

In this embodiment, the first motor interface 107 is used for connection with an external compressor, the second motor interface 108 is used for connection with an external fan, and the first motor interface 107 is arranged close to the side of the output power of the first power module 101, The second motor interface 108 is disposed close to the side of the output power of the second power module 102, which facilitates the wiring design of the control device and reduces the current loop.

As shown in FIG. 1 and FIG. 2 , it can be understood that, in the above embodiment, the electrolytic capacitor 106 includes a first capacitor C1 and a second capacitor C2, the positive electrode of the first capacitor C1 is connected to the first output terminal Q1, and the second capacitor C1 is connected to the first output terminal Q1. The negative electrode of the capacitor C2 is connected to the first output end Q3, and the negative electrode of the first capacitor C1 and the positive electrode of the second capacitor C2 are both connected to the first output end Q2.

In this embodiment, the electrolytic capacitor 106 is used to output the DC bus voltage, and the DC bus voltage is used to supply power to the first motor driving circuit and the second motor driving circuit.

In some examples, at least two high-frequency low-internal resistance electrolytic capacitors 106 can be used in parallel for both the first capacitor C1 and the second capacitor C2. Under the same capacitor requirement, compared with using one electrolytic capacitor 106, the electrolytic capacitor 106 can be reduced in size. The capacitor 106 occupies space, and at the same time, the internal resistance of the electrolytic capacitor 106 can be reduced, and the stability can be improved.

As shown in FIG. 1 and FIG. 2 , it can be understood that, in the above embodiment, the control device of the air conditioner further includes a power input interface 109 disposed on the circuit substrate 100 , and the inductance element includes a first inductance L1 , a second inductance L2 and the third inductance L3, one end of the first inductance L1 is connected to the first input end P1, one end of the second inductance L2 is connected to the second input end P2, one end of the third inductance L3 is connected to the third input end P3, the first The other end of an inductor L1 , the other end of the second inductor L2 and the other end of the third inductor L3 are all connected to the power input interface 109 .

In this embodiment, the first inductor L1 is connected between the A-phase alternating current input from the power input interface 109 and the first input terminal P1 of the power conversion module 103 , and the second inductor L2 is connected between the B-phase alternating current input from the power input interface 109 . Between the second input terminal P2 of the power conversion module 103 , the third inductor L3 is connected between the C-phase alternating current input from the power input interface 109 and the third input terminal P3 of the power conversion module 103 .

As shown in FIG. 1 , it can be understood that, in the above-mentioned embodiment, the AC input terminal and the DC output terminal are respectively arranged on both sides of the package 1031 , the first inductor L1 is arranged close to the first input terminal P1 , and the second inductor L2 is disposed close to the second input end P2, the third inductor L3 is disposed close to the third input end P3, and the electrolytic capacitor 106 is disposed close to the DC output end.

In this embodiment, the inductance element 105 is arranged on the side of the AC input of the power conversion module 103, and the electrolytic capacitor 106 is arranged on the side of the DC output of the power conversion module 103. This layout is conducive to the distinction between power flow and signal flow. At the same time, the wiring length is reduced, and the wiring design of the control device is optimized.

As shown in FIG. 1 , it can be understood that, in the above embodiment, the control device of the air conditioner further includes a switching power supply module 111 disposed on the circuit substrate 100 . The switching power supply module 111 is connected to the power input interface 109 , and the switching power supply module 111 is disposed close to the input end of the intelligent power module and the input end of the power conversion module 103 .

In this embodiment, the switching power supply module 111 supplies power to the control signals of the power conversion module 103 and the intelligent power module, and in some examples, the switching power supply module 111 also supplies power to the control chip 110 and the control assembly 112 .

As shown in FIG. 1 , it can be understood that, in the above embodiment, the control device of the air conditioner further includes a control chip 110 disposed on the circuit substrate 100 , and the power conversion module 103 , the intelligent power module and the switching power supply module 111 are all related to the The control chip 110 is electrically connected, and the control chip 110 is disposed close to the input end of the intelligent power module.

In this embodiment, the control chip 110 is used to issue control signals to the power conversion module 103 and the intelligent power module.

In this embodiment, the switching power supply module 111 is used to convert the DC bus voltage into a target DC voltage, and the target DC voltage is used to supply power to the control chip 110 and the control component 112 . The main control chip and switching power supply are close to the driving side (ie the input end) of the intelligent module and far away from the power output side (ie the output end), which facilitates the routing design of the driving signal and the sampling signal, reduces the switching noise, and further improves the performance of the control device. EMC performance.

The above-mentioned control chip 110 includes at least one of MCU (Micro-programmed Control Unit, micro program control device), CPU (Central Processing Unit, central processing unit), DSP (Digital Signal Processor, digital signal processor), single-chip microcomputer and embedded equipment. A logical computing device.

As shown in FIG. 1 , it can be understood that, in the above embodiment, the control device of the air conditioner further includes a plurality of control components 112 disposed on the circuit substrate 100 , the control components 112 are connected to the control chip 110 , and the control components 112 are close to The control chip 110 is set.

In some examples, the control component 112 includes a sampling resistor connected in series between the DC output terminal and the first motor interface 107 and/or between the DC output terminal and the second motor interface 108 , the sampling resistor is used for sampling at least one motor interface current.

In some examples, the control assembly 112 further includes an anti-inrush current loop, an EMI filter loop, and an anti-lightning loop, and the power input interface 109 is connected to the inductive element 105 through the anti-lightning loop, the EMI filtering loop, and the anti-inrush current loop in sequence.

Specifically, the EMI filter loop includes a common mode inductor and at least two types of safety capacitors (eg, 2 X capacitors and 4 Y capacitors).

In this embodiment, the anti-inrush current loop is used to prevent the control device from generating inrush current when the power input interface 109 is connected to the power supply; the EMI filter loop is used to reduce common mode interference and differential mode interference; the lightning protection loop is used to prevent lightning strikes The generated high voltage is input to the control device through the power input interface 109 . The arrangement of the above-mentioned anti-inrush current loop, EMI filter loop and lightning protection loop improves the safety and reliability of the control device, thereby making the service life of the control device longer.

In some examples, the control component 112 further includes an auxiliary loop, a communication loop, and a current detection loop. The auxiliary loop, the communication loop, and the current detection loop are all electrically connected to the control chip 110 , and the current detection loop is also connected to the power conversion module 103 .

In this embodiment, the current detection loop is connected between the inductance element 105 and the power conversion module 103 for detecting the AC current input to the power conversion module 103 .

In some examples, the current detection loop is connected between the electrolytic capacitor 106 and the power conversion module 103 for detecting the DC current output by the power conversion module 103 .

In some examples, the auxiliary circuit includes at least one of a four-way valve circuit, an electronic expansion valve circuit, an electric heating circuit, and a sensor circuit.

In this embodiment, the AC power is connected to the AC input end of the power conversion module 103 through the inductance element 105 after passing through the power input interface 109, the lightning protection circuit, the EMI filter circuit, and the inrush current protection circuit, and then the power conversion module The DC output terminal of 103 is output to the external electrolytic capacitor 106, and after charging, a smooth DC bus voltage is obtained, and the DC bus voltage is input into the parallel first motor drive circuit and the second motor drive circuit, and then through the first motor The drive circuit and the second motor drive circuit output drive signals to the motor to be driven to drive the motor to run.

In addition, the DC bus voltage needs to be converted into a target DC voltage to supply power to the control chip 110, the communication circuit, the four-way valve circuit, the electric heating circuit, the sensor circuit, and the electronic expansion valve circuit.

The control chip 110 is specifically used to control or drive the first power module 101 , the second power module 102 , the communication circuit, the four-way valve circuit, the electric heating circuit, the sensor circuit, and the electronic expansion valve circuit to work.

As shown in FIG. 7 , an air conditioner 300 according to an embodiment of the present disclosure includes:

a heat sink 301;

As in the control device of the air conditioner described in the above embodiment, the control device of the air conditioner is arranged close to the cooling device 301;

Wherein, the heat dissipation device 301 is an air-cooled heat sink or a refrigerant pipe of a refrigerant circulation system.

In this embodiment, the control device is arranged close to the heat dissipation device, so as to realize the heat dissipation of the control device, and the heat dissipation method can be air cooling or cooling medium pipe heat dissipation.

As shown in FIG. 7 , it can be understood that, in the above embodiment, the side of the heat dissipation component 104 away from the circuit substrate 100 is disposed close to the heat dissipation device.

In this embodiment, by disposing the heat dissipation component 104 close to the heat dissipation device, the heat dissipation efficiency of the control device is further improved.

Through the limitation of the control device, the air conditioner using the control device defined in the above embodiments at least also has the following technical effects:

(1) It is beneficial to the layout of components in the control device, and realizes the optimization of the layout of heat dissipation components and power devices;

(2) It is beneficial to the layout and wiring design of the control device, improves the EMC performance of the control device, and reduces the complexity of the control device design;

(3) It is conducive to the distinction between power flow and signal flow, and can also effectively solve the deformation of PCBA.

(4) It is beneficial to improve the production efficiency of the control device.

In the description of the present disclosure, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", " Rear, Left, Right, Vertical, Horizontal, Top, Bottom, Inner, Outer, Axial, Radial, Circumferential The orientation or positional relationship indicated by etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, a specific orientation, and a specific orientation. The orientation configuration and operation are therefore not to be construed as limiting the present disclosure.

In the description of the present disclosure, the meaning of several is one or more, the meaning of multiple is two or more, greater than, less than, exceeding, etc. are understood as not including this number, above, below, within, etc. are understood as including this number. If it is described that the first and the second are only for the purpose of distinguishing technical features, it cannot be understood as indicating or implying relative importance, or indicating the number of the indicated technical features or the order of the indicated technical features. relation.

In the present disclosure, unless otherwise expressly specified and limited, terms such as "installed", "connected", "connected" and "fixed" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection, Or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal communication between two elements or the interaction relationship between the two elements, unless otherwise specified limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific situations.

In the present disclosure, unless expressly stated and defined otherwise, a first feature "on" or "under" a second feature may be in direct contact with the first and second features, or indirectly through an intermediary between the first and second features touch. Also, the first feature being "above", "over" and "above" the 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 level higher than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature has a lower level than the second feature.

In the description of this specification, description with reference to the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples", etc., mean specific features described in connection with the embodiment or example , structures, materials, or features are included in at least one embodiment or example of the present disclosure. In this specification, schematic representations of the above terms are not necessarily directed to the same embodiment or example. Furthermore, the particular features, structures, materials or characteristics described may be combined in any suitable manner in any one or more embodiments or examples. Furthermore, those skilled in the art may combine and combine the different embodiments or examples described in this specification, as well as the features of the different embodiments or examples, without conflicting each other.

The above is a specific description of some implementations of the application, but the application is not limited to the above-mentioned embodiments. Those skilled in the art can make various equivalent modifications or replacements without departing from the spirit of the application. These equivalents Variations or substitutions of the above are all included within the scope defined by the claims of the present application.

Claims

A control device for an air conditioner, comprising:

Circuit board:

Power conversion module;

an intelligent power module, which is electrically connected to the power conversion module through the circuit substrate;

a heat dissipation assembly, the power conversion module and the intelligent power module are both located between the heat dissipation assembly and the circuit substrate, and the heat dissipation assembly is disposed close to the center of the circuit substrate;

Inductance element and electrolytic capacitor, both of which are electrically connected to the power conversion module through the circuit substrate, the inductance element and the electrolytic capacitor are respectively located on both sides of the heat dissipation component, so The power conversion module, the intelligent power module, the inductance element and the electrolytic capacitor are all arranged on the circuit substrate.
The control device of an air conditioner according to claim 1, wherein: the power conversion module comprises a package and a first switch tube, a second switch tube, a third switch tube, a first switch tube, a Four switch tubes, fifth switch tube, sixth switch tube, first diode, second diode, third diode, fourth diode, fifth diode and sixth diode, The power conversion module is a three-level rectification and booster module.
The control device of an air conditioner according to claim 2, wherein: the first switch tube, the second switch tube, the third switch tube, the fourth switch tube, and the fifth switch The first diode, the second diode, the third diode, the fourth diode, The fifth diode and the sixth diode are arranged along the other side edge of the package.
The control device of an air conditioner according to claim 2, wherein: the power conversion module further comprises an AC input terminal and a DC output terminal, and the AC input terminal comprises a first input terminal, a second input terminal and a third input terminal. an input end, the DC output end includes a first output end, a second output end and a third output end, the drain of the first switch tube, the anode of the first diode and the second diode The cathode of the tube is connected to the first input terminal, the drain of the third switch tube, the anode of the third diode and the cathode of the fourth diode are all connected to the second input terminal connection, the drain of the fifth switch tube, the anode of the fifth diode and the cathode of the sixth diode are all connected to the third input terminal, and the cathode of the first diode , the cathode of the third diode and the cathode of the fifth diode are connected to the first output end, the drain of the second switch tube, the drain of the fourth switch tube and The drain of the sixth switch tube is connected to the second output terminal, and the anode of the second diode, the anode of the fourth diode and the anode of the sixth diode are all connected to the anode. the third output terminal is connected, the source of the first switch is connected to the source of the second switch, the source of the third switch is connected to the source of the fourth switch, The source of the fifth switch is connected to the source of the sixth switch.
The control device of an air conditioner according to claim 4, wherein: the intelligent power module includes a first power module and a second power module, the first power module includes a first motor drive circuit, the second power module The power module includes a second motor drive circuit, the first output end and the third output end are both connected to the input end of the first motor drive circuit, and the second output end and the third output end are both connected to the input end of the first motor drive circuit. connected to the input end of the second motor drive circuit.
A control device for an air conditioner according to claim 5, wherein:

the first power module and the second power module are respectively located on both sides of the power conversion module;

or,

the first power module and the power conversion module are respectively located on both sides of the second power module;

or

The second power module and the power conversion module are respectively located on both sides of the first power module.
A control device for an air conditioner according to claim 5, wherein the control device for the air conditioner further comprises a first motor interface and a second motor interface provided on the circuit substrate, the first motor interface is connected to the output end of the first motor drive circuit, the second motor interface is connected to the output end of the second motor drive circuit, and the first motor interface is arranged close to the output end of the first motor drive circuit , the second motor interface is arranged close to the output end of the second motor drive circuit.
The control device of an air conditioner according to claim 4, wherein: the electrolytic capacitor comprises a first capacitor and a second capacitor, the positive electrode of the first capacitor is connected to the first output terminal, and the second capacitor is connected to the first output terminal. The negative electrode of the capacitor is connected to the third output end, and the negative electrode of the first capacitor and the positive electrode of the second capacitor are both connected to the second output end.
The control device for an air conditioner according to claim 4, wherein the control device for the air conditioner further comprises a power input interface provided on the circuit substrate, and the inductance element comprises a first inductance and a second inductance and a third inductor, one end of the first inductor is connected to the first input, one end of the second inductor is connected to the second input, and one end of the third inductor is connected to the third input The other end of the first inductor, the other end of the second inductor and the other end of the third inductor are all connected to the power input interface.
A control device for an air conditioner according to claim 9, wherein: the AC input end and the DC output end are respectively arranged on both sides of the package, and the first inductor is close to the first The input end is disposed, the second inductor is disposed close to the second input end, the third inductor is disposed close to the third input end, and the electrolytic capacitor is disposed close to the DC output end.
The control device for an air conditioner according to claim 9, wherein the control device for the air conditioner further comprises a switching power supply module arranged on the circuit substrate, and the switching power supply module is connected to the power input interface , the switching power supply module is arranged close to the input end of the intelligent power module and the input end of the power conversion module.
A control device for an air conditioner according to claim 11, wherein the control device for the air conditioner further comprises a control chip arranged on the circuit substrate, the power conversion module, the intelligent power module and the control chip. The switching power supply modules are all electrically connected to the control chip, and the control chip is disposed close to the input end of the intelligent power module.
A control device for an air conditioner according to claim 12, wherein the control device for the air conditioner further comprises a plurality of control components arranged on the circuit substrate, the control components are connected to the control chip, The control assembly is arranged close to the control chip.
An air conditioner comprising:

cooling device;

The control device of an air conditioner according to any one of claims 1 to 13, wherein the control device of the air conditioner is arranged close to the heat dissipation device;

Wherein, the heat dissipation device is an air-cooled heat sink or a refrigerant pipe of a refrigerant circulation system.