CN110486851B - Automatically controlled subassembly, off-premises station and air conditioner - Google Patents
Automatically controlled subassembly, off-premises station and air conditioner Download PDFInfo
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- CN110486851B CN110486851B CN201810466940.8A CN201810466940A CN110486851B CN 110486851 B CN110486851 B CN 110486851B CN 201810466940 A CN201810466940 A CN 201810466940A CN 110486851 B CN110486851 B CN 110486851B
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- pfc
- ipm module
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F1/00—Room units for air-conditioning, e.g. separate or self-contained units or units receiving primary air from a central station
- F24F1/06—Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger
- F24F1/20—Electric components for separate outdoor units
- F24F1/24—Cooling of electric components
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Abstract
The invention discloses an electric control assembly, an outdoor unit and an air conditioner, wherein the electric control assembly comprises a main controller, a rectifier bridge, a PFC circuit, a direct current bus capacitor and a compressor IPM module, the rectifier bridge, the PFC circuit and the compressor IPM module are sequentially connected, the direct current bus capacitor is connected in parallel with the output end of the PFC circuit, and the main controller is respectively connected with the PFC circuit and the compressor IPM module; the electronic control assembly further comprises: the box body is detachably connected with the liquid storage tank so as to dissipate heat through contact of the liquid storage tank; the first circuit board, the rectifier bridge, the compressor IPM module, the PFC circuit and the DC bus capacitor are all arranged on the first circuit board, and the first circuit board is arranged in the box body; the main controller is arranged on the second circuit board. The invention utilizes the low-temperature working environment of the liquid storage tank to improve the heat dissipation rate of the electric control assembly.
Description
Technical Field
The invention relates to the technical field of electric appliance control, in particular to an electric control assembly, an outdoor unit and an air conditioner.
Background
In an electrical apparatus such as an air conditioner and a refrigerator, which is equipped with a frequency converter, a PFC circuit, an IPM circuit, and the like are generally provided, and these circuit elements generate heat during operation, and if the heat is not dissipated in time, the working performance of the electrical apparatus may be affected. Therefore, the temperature of the heating elements such as PFC and IPM must be reduced to ensure the reliability and the service life thereof.
At present, most of the methods for performing the above heating elements adopt a method of externally connecting a metal radiator, for example, in an air conditioner, heat radiation may be performed by an outdoor unit fan, which needs to increase the power of the fan and increase the volume of the radiator, resulting in an increase in heat radiation cost, but the heat radiation efficiency is still low, and the temperature of the heating elements such as PFC, IPM, and the like is still over 100 ℃.
Disclosure of Invention
The invention mainly aims to provide an electric control assembly, an outdoor unit and an air conditioner, and aims to improve the heat dissipation rate of the electric control assembly by utilizing the low-temperature working environment of a liquid storage tank.
In order to achieve the above object, the present invention provides an electronic control assembly, which includes a main controller, a rectifier bridge, a PFC circuit, a dc bus capacitor, and a compressor IPM module, wherein the rectifier bridge, the PFC circuit, and the compressor IPM module are sequentially connected, the dc bus capacitor is connected in parallel to an output end of the PFC circuit, and the main controller is connected to the PFC circuit and the compressor IPM module respectively; the electronic control assembly further comprises:
the box body is detachably connected with the liquid storage tank so as to dissipate heat through contact of the liquid storage tank;
the rectifier bridge, the compressor IPM module, the PFC circuit and the DC bus capacitor are all arranged on the first circuit board, and the first circuit board is arranged in the box body;
and the main controller is arranged on the second circuit board.
Optionally, a power input interface, a switching power supply and an EMC filter circuit are further disposed on the second circuit board, an input end of the EMC filter circuit is connected to the power input interface, and an output end of the EMC filter circuit is connected to the rectifier bridge;
the input end of the switching power supply is connected with the rectifier bridge, and the output end of the switching power supply is electrically connected with the power end of the main controller.
Optionally, the PFC circuit includes a PFC power switch and a PFC inductor;
the box body is provided with a first accommodating cavity and a second accommodating cavity, the rectifier bridge, the PFC power switch and the compressor IPM module are accommodated in the first accommodating cavity, the PFC inductor and the DC bus capacitor are accommodated in the second accommodating cavity, and the PFC inductor and the DC bus capacitor radiate heat through the second accommodating cavity;
the PFC power switch is integrated in the compressor IPM module, or the PFC power switch and the compressor IPM module are separately arranged.
Optionally, the electronic control assembly further includes a dc fan IPM module, the dc fan IPM module is disposed on the first circuit board or the second circuit board, and the dc fan IPM module is electrically connected to the main controller.
Optionally, the automatically controlled subassembly still includes the heat dissipation panel beating, one side fixed mounting of heat dissipation panel beating is in a side of liquid storage pot, the opposite side of heat dissipation panel beating with the connection can be dismantled to the box body.
Optionally, the electronic control assembly further includes a mounting bracket, the mounting bracket has a first side and a second side opposite to each other, the first side of the mounting bracket is attached to the first circuit board, the compressor IPM module is mounted on the second side of the mounting bracket, and pins of the compressor IPM module pass through the mounting bracket and are fixedly connected to the first circuit board;
the box body is provided with an installation window, and the compressor IPM module is attached to the heat dissipation metal plate through the installation window.
Optionally, the rectifier bridge is installed on the second side of the mounting bracket, pins of the rectifier bridge penetrate through the mounting bracket and the first circuit board to be connected and fixed, and the rectifier bridge is attached to the heat dissipation metal plate through the mounting window.
The invention also provides an outdoor unit, which comprises a compressor and the electric control assembly, wherein the compressor is provided with a liquid storage tank, the electric control assembly is fixedly arranged on the outer wall of the liquid storage tank, and a main controller of the electric control assembly is communicated with the indoor unit.
Optionally, the second circuit board is disposed in the box body, or the second circuit board is disposed in a casing of the outdoor unit and located outside the box body.
Optionally, the compressor further comprises a compressor main body, the liquid storage tank is arranged on one side of the compressor main body, and the box body is installed between the compressor main body and the liquid storage tank.
The invention also provides an air conditioner, which comprises a compressor and the electric control assembly, wherein the compressor is provided with a liquid storage tank, and the electric control assembly is fixedly arranged on the outer wall of the liquid storage tank; or the outdoor unit comprises the indoor unit and the outdoor unit, and the main controller of the outdoor unit is in communication connection with the main control chip of the indoor unit.
The electric control assembly arranges a rectifier bridge, a compressor IPM module, a PFC power switch, a PFC inductor and a DC bus capacitor on the first circuit board, and arranges a main controller on the second circuit board; the heat dissipation device comprises a main controller, a compressor IPM module, a PFC power switch, a PFC inductance, a direct-current bus capacitor and other components and circuit modules, wherein the main controller is electrically connected with the compressor IPM module through wires, the first circuit board is arranged in a box body, the box body is detachably connected with a liquid storage tank, and the heat dissipation is realized through the contact of the liquid storage tank, so that the components and the circuit modules on the first circuit board are beneficial to heat dissipation, the rectifier bridge, the compressor IPM module, the PFC power switch, the PFC inductance, the direct-current bus capacitor and the like, and the circuit modules work, the generated heat is conducted to the liquid storage tank through the box body and is absorbed by refrigerant in the liquid storage tank during vaporization, the low-temperature working environment of the liquid storage tank is utilized, and the heat dissipation rate is improved. The electric control assembly is realized by adopting the second circuit board and the first circuit board, and the rectifier bridge, the IPM module of the compressor, the PFC power switch, the PFC inductor, the direct current bus capacitor and other heat source devices and the main controller and other non-heat sources are separately arranged, so that the heat source devices can be prevented from radiating to the non-heat source devices, and the work of the non-heat source devices is prevented from being influenced. And can solve when adopting a monoblock circuit board to realize, components and parts are intensive, the difficult problem of circuit wiring and electrical apparatus isolation, adopt two circuit boards can also reduce the monoblock circuit board, for example the volume of first circuit board, conveniently install in the box body of automatically controlled subassembly, simplified the PCB board overall arrangement of automatically controlled board.
The electric control assembly of the invention arranges a rectifier bridge, a compressor IPM module, a PFC power switch, a PFC inductor and a DC bus capacitor on the first circuit board, and arranges a main controller on the second circuit board; the heat dissipation device comprises a main controller, a compressor IPM module, a PFC power switch, a PFC inductance, a direct-current bus capacitor and other components and circuit modules, wherein the main controller is electrically connected with the compressor IPM module through wires, the first circuit board is arranged in a box body, the box body is detachably connected with a liquid storage tank, and the heat dissipation is realized through the contact of the liquid storage tank, so that the components and the circuit modules on the first circuit board are beneficial to heat dissipation, the rectifier bridge, the compressor IPM module, the PFC power switch, the PFC inductance, the direct-current bus capacitor and the like, and the circuit modules work, the generated heat is conducted to the liquid storage tank through the box body and is absorbed by refrigerant in the liquid storage tank during vaporization, the low-temperature working environment of the liquid storage tank is utilized, and the heat dissipation rate is improved. The electric control assembly is realized by adopting the second circuit board and the first circuit board, and the rectifier bridge, the IPM module of the compressor, the PFC power switch, the PFC inductor, the direct current bus capacitor and other heat source devices and the main controller and other non-heat sources are separately arranged, so that the heat source devices can be prevented from radiating to the non-heat source devices, and the work of the non-heat source devices is prevented from being influenced. And can solve when adopting a monoblock circuit board to realize, components and parts are intensive, the difficult problem of circuit wiring and electrical apparatus isolation, adopt two circuit boards can also reduce the monoblock circuit board, for example the volume of first circuit board, conveniently install in the box body of automatically controlled subassembly, simplified the PCB board overall arrangement of automatically controlled board.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic circuit diagram of an electrical control assembly according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of an embodiment of an electrical control assembly according to the present invention;
FIG. 3 is a schematic structural diagram of a first circuit board of the electronic control assembly according to an embodiment of the present invention;
FIG. 4 is a schematic structural diagram of a second circuit board of the electronic control assembly according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of an outdoor unit according to an embodiment of the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that, if directional indications (such as up, down, left, right, front, and back … …) are involved in the embodiment of the present invention, the directional indications are only used to explain the relative positional relationship between the components, the movement situation, and the like in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indications are changed accordingly.
In addition, if there is a description of "first", "second", etc. in an embodiment of the present invention, the description of "first", "second", etc. is for descriptive purposes only and is not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The invention provides an electric control assembly which can be used in equipment such as an air conditioner, a refrigerator and the like, and the electric control assembly is described by taking the electric control assembly applied to the air conditioner as an example for convenience in understanding.
Referring to fig. 1 to 5, in an embodiment of the present invention, the electronic control assembly includes a main controller 10, a rectifier bridge 20, a PFC circuit 30, a dc bus capacitor 40 and a compressor IPM module 50, wherein the rectifier bridge 20, the PFC circuit 30 and the compressor IPM module 50 are sequentially connected, the dc bus capacitor 40 is connected in parallel to an output end of the PFC circuit 30, and the main controller 10 is respectively connected to the PFC circuit 30 and the compressor IPM module 50; the electronic control assembly further comprises:
the box body 100 is detachably connected with the liquid storage tank 200 so as to dissipate heat through the contact of the liquid storage tank 200;
the rectifier bridge 20, the compressor IPM module 50, the PFC circuit 30 and the dc bus capacitor 40 are disposed on the first circuit board 110, and the first circuit board 110 is disposed in the box 100;
a second circuit board 120, the main controller 10 being disposed on the second circuit board 120.
In this embodiment, the case 100 is used to accommodate the first circuit board 110, and the case 100 may be made of plastic material, or may be made of metal material such as aluminum or aluminum alloy material, and this embodiment may be implemented by metal material. The box body 100 is fixedly arranged on the liquid storage tank 200 through one or more of the combination of a screw, a bolt, a rivet joint, a welding, a clamping joint and a plug-in mode, and is attached to one side surface of the liquid storage tank 200, and the refrigerant in the liquid storage tank 200 absorbs heat when being vaporized, so that the working temperature of the refrigerant is generally maintained between 20 ℃ below zero and 30 ℃, and the arrangement is favorable for the rectifier bridge 20, the compressor IPM module 50, the PFC power switch 31, the PFC inductor 32, the direct current bus capacitor 40 and other components and circuit modules on the first circuit board 110 to work, the generated heat is conducted to the liquid storage tank 200 through the box body 100 and is absorbed by the refrigerant in the liquid storage tank 200 when being vaporized, and therefore, the low-temperature working environment of the liquid storage tank 200 is utilized, and the heat dissipation rate is improved. Because the temperature of the heating elements such as the IPM module 50 of the compressor can be reduced very low, the module (chip) can generate higher heat power under the same condition, that is, the current chip can be used to drive higher power load without overheating and damage, in other words, a smaller module can drive a larger number of air conditioners.
In this embodiment, the second circuit board 120 further has a power input interface Vin for receiving ac power, a power output interface Vout for outputting ac power to the first circuit board, and a communication interface CN1 for communicating with an external device, such as an indoor unit of an air conditioner. The first circuit board 110 is also provided with a controller 111 for performing data processing. The main controller 10 integrates a timing controller, a memory, a data processor, and a software program and/or module stored in the memory and executable on the data processor, the main controller 10 executes or executes the software program and/or module stored in the memory, calls the data stored in the memory, and communicates with the control unit on the second circuit board 120 of the indoor unit through the communication interface CN1 to output the control signal output by the control unit to the controller on the first circuit board 110, and the controller converts the control signal into a corresponding logic level signal and outputs the logic level signal to the PFC power switch 31 and the compressor IPM module 50 to drive the PFC power switch 31 and the compressor IPM module 50 to operate.
In this embodiment, the PFC circuit 30 may further include a PFC power switch 31, a diode (not shown), a PFC inductor 32, and other components, so as to correct a power factor of the dc power supply. The PFC circuit 30 may be implemented by a passive PFC circuit to form a boost PFC circuit, a buck PFC circuit, or a boost PFC circuit. It is understood that, in practical applications, the positions and the connection relationship between the PFC power switch 31 and the rectifier bridge 20 may be adaptively adjusted according to the setting type of the PFC circuit 30. The PFC circuit 30 adjusts the power factor of the dc power input by the rectifier bridge 20 based on the control of the main controller 10, for example, the dc voltage output by the rectifier bridge 20 is increased and stabilized at 380V, so that the input current follows the input voltage, and the power factor of the dc power supply is ensured to be above 0.9. The adjusted dc power is transmitted to the dc bus capacitor 40, filtered by the dc bus capacitor 40 and then output to the compressor IPM module 50, so as to be the compressor IPM module 50. The regulated dc power can also be used to generate various driving voltages, such as 5V and 15V, through the switching power supply 70 circuit to supply power to the second circuit board 120, such as the main controller 10 and the components on the first circuit board 110.
It can be understood that the second circuit board 120 is further provided with a real-time detection circuit capable of detecting parameters such as current, temperature, and voltage of each element in the rectifier bridge 20, the PFC power switch 31, and the compressor IPM module 50, and when a fault such as a severe overload, a direct short circuit, or an overheat temperature, an overvoltage driving voltage, etc. occurs, the real-time detection circuit can control the power device in the IPM to be turned off softly, and send a fault signal to the control circuit unit at the same time, so that the control circuit unit controls other circuit modules to operate, thereby preventing other circuit modules from being damaged due to the fault.
In this embodiment, the IPM module 50 of the compressor integrates a plurality of power switch transistors, and the plurality of power switch transistors form a driving inverter circuit, for example, six power switch transistors form a three-phase inverter bridge circuit, or four power switch transistors form a two-phase inverter bridge circuit. Each power switch tube can be realized by adopting an MOS tube or an IGBT. The compressor IPM module 50 is used to drive the compressor motor. In other embodiments, the compressor IPM module 50 may also be used for driving frequency converters of other motors and various inverter power supplies, and may be applied to the fields of variable frequency speed regulation, metallurgical machinery, electric traction, servo drive, and variable frequency household appliances such as air conditioners. It is understood that, in order to improve the integration of the compressor IPM module 50 and reduce the size of the circuit board, the PFC power switch 31 may be integrated into the compressor IPM module 50 in this embodiment, but in other embodiments, the PFC power switch 31 and the compressor IPM module 50 may be separately disposed, which is not limited herein.
In this embodiment, the number of the dc bus capacitors 40 may be one or multiple, and may be specifically set according to the number of power devices, for example, in an air conditioner with 1 or 2, the number of the dc bus capacitors 40 is generally set to one, and in an air conditioner with 3 or more, the number of the dc bus capacitors 40 is generally set to two or more. Of course, in other embodiments, the number of the dc bus capacitors 40 may be set according to the energy storage requirement of the power device, and is not limited herein.
It should be noted that, the rectifier bridge 20, the compressor IPM module 50, the PFC power switch 31, the PFC inductor 32 and the dc bus capacitor 40, especially, the compressor IPM module 50 generally generates heat seriously during operation, and heat generated by the power device is conducted to the main controller 10 through the electric control board, so that the temperature of the main controller 10 is almost the same as that of the main controller 10. And the ideal operating temperature of the main controller 10 is mostly lower than that of the power device, so the operating temperature of the power device may cause the operating temperature of the main controller 10 to be too high, and malfunction occurs, so that the main controller 10 is liable to output an erroneous control signal, in order to avoid the above-mentioned problem, the main controller 10 is provided on the second circuit board 120 in the present embodiment, the rectifier bridge 20, the compressor IPM module 50, the PFC power switch 31, the PFC inductor 32 and the dc bus capacitor 40 are disposed on the first circuit board 110, between the main controller 10 and the compressor IPM module 50, and the main controller 10 and the PFC power switch 31 may be electrically connected by a wire, the first circuit board 110 is disposed in the box body 100, and heat is dissipated through the liquid storage tank 200, thereby maintaining the operating temperature of the components and circuit modules on the first circuit board 110 at-20 to 120 ℃. By the arrangement, heat generated by the rectifier bridge 20, the compressor IPM module 50, the PFC power switch 31, the PFC inductor 32 and the DC bus capacitor 40 can be quickly dissipated through the liquid storage tank 200 without dissipating heat devices such as a hot fan, heat dissipation efficiency can be improved, and meanwhile, the driving delay of the PFC power switch 31 and the compressor IPM module 50 is shortened, so that the switching speed of each power switch tube can be increased, the switching loss and the electromagnetic interference of the compressor IPM module 50 can be reduced, and the compressor IPM module 50 can be reliably operated for a long time.
In the invention, based on the electric control component for heat dissipation of the compressor liquid storage tank 200, the rectifier bridge 20, the compressor IPM module 50, the PFC power switch 31, the PFC inductor 32 and the DC bus capacitor 40 are arranged on the first circuit board 110, and the main controller 10 is arranged on the second circuit board 120; the main controller 10 and the compressor IPM module 50, and the main controller 10 and the PFC power switch 31 can be electrically connected by a wire, the first circuit board 110 is disposed in the box body 100, and the box body 100 is detachably connected to the liquid storage tank 200, and heat is dissipated by the contact of the liquid storage tank 200, which is beneficial to the rectifier bridge 20, the compressor IPM module 50, the PFC power switch 31, the PFC inductor 32, the dc bus capacitor 40 and other components and circuit modules on the first circuit board 110 during operation, and the generated heat is conducted to the liquid storage tank 200 through the box body 100 and absorbed by the refrigerant in the liquid storage tank 200 during vaporization, thereby utilizing the low temperature working environment of the liquid storage tank 200 and improving the heat dissipation rate. The electric control assembly is realized by adopting the second circuit board 120 and the first circuit board 110, and heat source devices such as the rectifier bridge 20, the compressor IPM module 50, the PFC power switch 31, the PFC inductor 32 and the DC bus capacitor 40 are separately arranged from non-heat sources such as the main controller 10, so that the heat source devices can be prevented from radiating heat to the non-heat source devices, and the work of the non-heat source devices is prevented from being influenced. And can solve when adopting a monoblock circuit board to realize, components and parts are intensive, the difficult problem of circuit wiring and electrical apparatus isolation, adopt two circuit boards and can also reduce the volume of monoblock circuit board, for example first circuit board 110, conveniently install in the box body 100 of automatically controlled subassembly, simplified the PCB board overall arrangement of automatically controlled board. The invention solves the problems that the heat dissipation cost is increased and the heat dissipation efficiency is still lower due to the adoption of increasing the power of the fan and increasing the volume of the heat sink.
Referring to fig. 1 to 5, in an alternative embodiment, the electronic control assembly further includes a dc fan IPM module 60, the dc fan IPM module 60 is disposed on the first circuit board 110, and the dc fan IPM module 60 is electrically connected to the main controller 10.
It should be noted that the outdoor fan of the air conditioner can be divided into an ac fan and a dc fan, the ac fan generally operates without driving, and the dc fan needs to be driven by power to control its operation. In this embodiment, the outdoor fan may be implemented by a direct current fan, and the direct current fan IPM module 60 is adapted to drive the direct current fan, the direct current fan IPM module 60 and the compressor IPM module 50 are respectively integrated with a plurality of power switch tubes such as IGBTs and MOS tubes, the number of the plurality of power switch tubes may be four or six, the specific number may be set according to the type of the motor, the driving power, and the like, and the present disclosure is not limited herein. Of course, in other embodiments, the dc fan IPM module 60 may also be disposed on the second circuit board 120, and the embodiment is described by taking the dc fan IPM module 60 disposed on the second circuit board 120 as an example.
Referring to fig. 1 to 5, in an alternative embodiment, the PFC circuit 30 includes a PFC power switch 31 and a PFC inductor 32;
the box body 100 has a first receiving cavity and a second receiving cavity, the rectifier bridge 20, the PFC power switch 31 and the compressor IPM module 50 are received in the first receiving cavity, the PFC inductor 32 and the dc bus capacitor 40 are received in the second receiving cavity, and the PFC inductor 32 and the dc bus capacitor 40 radiate heat through the second receiving cavity.
In this embodiment, the first accommodating cavity is disposed opposite to the heat dissipation metal plate 300, and heat generated by the rectifier bridge 20, the PFC power switch 31 and the compressor IPM module 50 can be quickly conducted to the liquid storage tank 200 through the heat dissipation metal plate 300, so as to accelerate heat dissipation of the above components and improve heat dissipation efficiency. The outer wall of the second accommodating cavity is at least partially attached to the outer wall of the liquid storage tank 200, so that the PFC inductor 32 and the dc bus capacitor 40 on the first circuit board 110 generate heat seriously, and the components with large volume are assembled into the second accommodating cavity, so that when the components and circuit modules such as the PFC inductor 32 and the dc bus capacitor 40 work, the generated heat is conducted to the liquid storage tank 200 through the second accommodating cavity and absorbed by the refrigerant in the liquid storage tank 200 during vaporization, and thus the low-temperature working environment of the liquid storage tank 200 is utilized, and the heat dissipation rate is improved.
Referring to fig. 1 to 5, in an optional embodiment, the electronic control assembly further includes a heat dissipation sheet metal 300, one side of the heat dissipation sheet metal 300 is fixedly mounted on a side surface of the liquid storage tank 200, and the other side of the heat dissipation sheet metal 300 is detachably connected to the box 100.
In this embodiment, one side of heat dissipation panel beating 300 can be through one or more combination mounting in screw, bolt, riveting, welding, joint and the grafting mode on the liquid storage pot 200, the opposite side of heat dissipation panel beating 300 can be equally can be through screw, bolt, riveting, welding, one or more combination and box body 100 can be dismantled fixedly in joint and the grafting mode, the material of heat dissipation panel beating 300 can be aluminium and aluminium alloy, copper and copper alloy, or the panel beating that other metal material made, so, fix box body 100 on liquid storage pot 200, thereby reduce liquid storage pot 200 and take place relative motion and produce the vibration, and transmit to in the box body 100, influence the normal work of circuit module on the first circuit board 110. Meanwhile, when the components and circuit modules such as the rectifier bridge 20, the compressor IPM module 50, the PFC power switch 31, the PFC inductor 32, the dc bus capacitor 40 and the like on the first circuit board 110 work, the generated heat is conducted to the heat dissipation metal plate 300 through the box body 100, the speed of transferring the heat to the liquid storage tank 200 is increased through the heat dissipation metal plate 300, and the heat dissipation rate is increased.
Referring to fig. 1 to 5, in an alternative embodiment, the electronic control assembly further includes a mounting bracket 400, the mounting bracket 400 has a first side and a second side opposite to each other, the first side of the mounting bracket 400 is attached to the first circuit board 110, the compressor IPM module 50 is mounted on the second side of the mounting bracket 400, and the pins of the compressor IPM module 50 are all fixed to the first circuit board 110 through the mounting bracket 400;
the box 100 has an installation window, and the compressor IPM module 50 is attached to the heat dissipation metal plate 300 through the installation window.
Further, in the above embodiment, the rectifier bridge 20 is installed at the second side of the mounting bracket 400, the pins of the rectifier bridge 20 penetrate through the mounting bracket 400 to be connected and fixed with the first circuit board 110, and the rectifier bridge 20 is attached to the heat dissipation metal plate 300 through the mounting window.
In this embodiment, most of the pins of the compressor IPM module 50 are in the direct-insert type or gull-wing type package, and the contact area between the pins and the first circuit board 110 is generally small, especially the direct-insert type, so that the bearing capacity of the compressor IPM module 50 is small, in order to avoid the compressor IPM module 50 being deformed by extrusion or damaged when the first circuit board 110 is mounted on the heat dissipation sheet metal 300, the present embodiment is further provided with a mounting bracket 400, and the compressor IPM module 50 and the rectifier bridge 20 are disposed on the mounting bracket 400, and the pins pass through the mounting bracket 400 and are connected and fixed with the first circuit board 110. With such an arrangement, the compressor IPM module 50 and the rectifier bridge 20 can be arranged opposite to the heat dissipation metal plate 300, so that heat generated by the compressor IPM module 50 and the rectifier bridge 20 can be quickly conducted through the heat dissipation metal plate 300, and the heat dissipation rate of the compressor IPM module 50 and the rectifier bridge 20 is improved. After the box 100 is fixedly mounted on the liquid storage tank 200, in order to reduce the vibration generated by the relative motion between the first circuit board 110 and the liquid storage tank 200 and transmit the vibration to the first circuit board 110, when the box 100 is fixed on the liquid storage tank 200, the first circuit board 110 may be fixed on the heat dissipation metal plate 300 by screws or bolts, and of course, the first circuit board 110 may also be connected and fixed with the box 100 and the heat dissipation metal plate 300 by other methods, which is not limited herein.
Referring to fig. 1 to 5, in an alternative embodiment, the electronic control assembly further includes a sealing ring 500, and the sealing ring 500 is disposed between the cartridge body 100 and the mounting bracket 400.
It should be noted that the working temperature of the liquid storage tank 200 is generally maintained at a temperature of-20 to 30 ℃, so that moisture in the air may be condensed into condensed water in the liquid storage tank 200, and the condensed water may enter the box 100 of the electronic control component along the heat dissipation sheet metal 300 on the outer wall of the liquid storage tank 200, so that the rectifier bridge 20, the compressor IPM module 50, the PFC power switch 31, the PFC inductor 32 and the dc bus capacitor 40 are affected by moisture and short circuit, thereby affecting the normal operation of the electronic control component. In order to solve the above problem, in this embodiment, a sealing ring 500, i.e. a sealing gasket, is further disposed between the mounting bracket 400 and the box 100 to isolate the box 100 from the heat dissipation metal plate 300, so as to seal the components in the box 100.
Referring to fig. 1 to 5, in an alternative embodiment, the electronic control assembly further includes a cover 600 fastened to the opening of the box body 100, and the cover 600 is tightly fitted to the box body 100 to form a sealing structure.
In this embodiment, the size and shape of the box cover 600 are adapted to the size and shape of the first circuit board 110, and may be square, but not limited to square. The box cover 600 and the box body 100 are tightly matched to form a sealing structure, so that the arrangement is favorable for preventing dangers such as external cold air, dust, rainwater, mosquitoes and the like from falling onto the first circuit board 110, and the safe operation of the electric control assembly is guaranteed. In addition, the sealing structure can also transmit and absorb electromagnetic radiation generated by an external electric field, so that the electromagnetic radiation entering the electronic components in the box body 100 is weakened, and the box body 100 has a better electromagnetic shielding function. The sealing structure may also reflect and absorb electromagnetic interference generated by the electronic components inside the box 100, so as to shield electromagnetic signals generated by the electric field of the electronic components inside the box 100, and prevent electromagnetic radiation of the electronic components inside the box 100 from affecting normal operation of surrounding electrical equipment.
It can be understood that the box cover 600 further has a through hole, and the power wires, the data wires, etc. on the first circuit board 110 can be electrically connected to the circuit element interfaces (not shown) of the second circuit board 120, the external dc fan, the compressor fan, etc. through the through hole (not shown).
Referring to fig. 1 to 5, in an alternative embodiment, the second circuit board 120 is disposed in the box body 100, or the second circuit board 120 is disposed in the outdoor unit casing and outside the box body 100.
In this embodiment, the second circuit board 120 may be disposed in the casing 100 of the electronic control component, or may be disposed outside the casing 100, for example, on a mounting position corresponding to a casing of an outdoor unit of an air conditioner, for example, a top of the casing, and the second circuit board 120 may also be mounted on a mounting position corresponding to an indoor unit. In the present embodiment, the second circuit board 120 and the first circuit board 110 may be mounted in the box 100 of the electronic control assembly, and it can be understood that the mounting positions of the second circuit board 120 and the first circuit board 110 on the box 100 may be adjusted according to the respective plate types and sizes and the shape of the liquid storage tank 200, so as to adapt the box 100 to the liquid storage tank 200.
Referring to fig. 1 to 5, in an alternative embodiment, a power input interface Vin, a switching power supply 70 and an EMC filter circuit 80 are further disposed on the second circuit board 120, an input terminal of the switching power supply 70 is connected to the power input interface Vin, an input terminal of the EMC filter circuit 80 is connected to the power input interface Vin, and an output terminal of the EMC filter circuit 80 is connected to the rectifier bridge 20;
the input end of the switching power supply 70 is connected to the rectifier bridge 20, and the output end of the switching power supply 70 is electrically connected to the power supply end of the main controller 10.
In this embodiment, the switching power supply 70 may be composed of a transformer, a dc regulator chip, a switching power supply 70 chip, a voltage sampling resistor, a current sampling resistor, and other components, and the switching power supply 70 is configured to convert an ac power supply or a dc power supply to generate driving voltages with various values, for example, voltages of 3.3V, 5V, 12V, and 15V, to supply power to the components on the second circuit board 120, for example, the main controller 10 and the first circuit board 110. In this embodiment, the EMC filter circuit 80 can provide EMC, EMS, lightning protection, and other related functional protection for the second circuit board 120 and the first circuit board 110.
The invention also provides an outdoor unit.
Referring to fig. 5, the outdoor unit includes a compressor 700 and the electric control assembly, the compressor 700 has a liquid storage tank 200, the electric control assembly is fixedly mounted on an outer wall of the liquid storage tank 200, and a main controller of the electric control assembly is in communication with the indoor unit. The detailed structure of the electronic control assembly can refer to the above embodiments, and is not described herein again; it can be understood that, because the outdoor unit of the present invention employs the above-mentioned electronic control assembly, the embodiment of the outdoor unit of the air conditioner of the present invention includes all technical solutions of all embodiments of the above-mentioned electronic control assembly, and the achieved technical effects are also completely the same, and are not described herein again.
In the above embodiment, the liquid storage tank 200 is disposed at one side of the compressor main body, and the box body 100 is installed between the compressor main body and the liquid storage tank 200.
The working temperature of the liquid storage tank 200 is generally maintained between minus 20 ℃ and 30 ℃, so that moisture in the air can be condensed into condensed water in the liquid storage tank, the condensed water can enter the box body of the electric control component along the heat dissipation sheet metal on the outer wall of the liquid storage tank, the temperature of the compressor 700 is generally higher than that of the liquid storage tank 200, the temperature of one side of the liquid storage tank 200 close to the compressor is relatively higher and basically the same as the ambient temperature, and the condensed water is not easy to form, so that the electric control box body 100 is arranged between the compressor main body and the liquid storage tank 200, and the condensed water formed on the liquid storage tank 200 can be prevented from entering the box body of the electric control component to influence the normal work.
The invention also provides an air conditioner, which comprises a compressor and the electric control assembly, wherein the compressor is provided with a liquid storage tank, and the electric control assembly is fixedly arranged on the outer wall of the liquid storage tank. Or the outdoor unit comprises an indoor unit and the outdoor unit as described above, wherein the main controller of the outdoor unit is in communication connection with the main control chip of the indoor unit.
It should be understood that the air conditioner includes all embodiments of the electrical control assembly or the outdoor unit, and has the same technical effects as the electrical control assembly or the outdoor unit, and the details are not described herein.
The above description is only an alternative embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (9)
1. An electric control assembly based on heat dissipation of a compressor liquid storage tank comprises a main controller, a rectifier bridge, a PFC circuit, a direct current bus capacitor and a compressor IPM module, wherein the rectifier bridge, the PFC circuit and the compressor IPM module are sequentially connected, the direct current bus capacitor is connected in parallel with the output end of the PFC circuit, and the main controller is respectively connected with the PFC circuit and the compressor IPM module; characterized in that, the electric control assembly further comprises:
the box body is detachably connected with the liquid storage tank of the compressor so as to dissipate heat through the contact of the liquid storage tank of the compressor;
the rectifier bridge, the compressor IPM module, the PFC circuit and the DC bus capacitor are all arranged on the first circuit board, and the first circuit board is arranged in the box body;
the main controller is arranged on the second circuit board;
the PFC circuit comprises a PFC power switch and a PFC inductor;
the box body is provided with a first accommodating cavity and a second accommodating cavity, the rectifier bridge, the PFC power switch and the compressor IPM module are accommodated in the first accommodating cavity, the PFC inductor and the DC bus capacitor are accommodated in the second accommodating cavity, and the PFC inductor and the DC bus capacitor radiate heat through the second accommodating cavity; wherein, the outer wall of the second accommodating cavity is at least partially attached to the outer wall of the liquid storage tank.
2. The electrical control assembly for dissipating heat from a compressor fluid reservoir as set forth in claim 1, wherein said second circuit board further comprises a power input interface, a switching power supply, and an EMC filter circuit, wherein an input of said EMC filter circuit is connected to said power input interface, and an output of said EMC filter circuit is connected to said rectifier bridge;
the input end of the switching power supply is connected with the rectifier bridge, and the output end of the switching power supply is electrically connected with the power end of the main controller.
3. The electrical control assembly for dissipating heat based on a compressor reservoir of claim 1,
the PFC power switch is integrated in the compressor IPM module, or the PFC power switch and the compressor IPM module are separately arranged.
4. The compressor-reservoir-based heat dissipation electronic control assembly of claim 1, further comprising a dc fan IPM module, wherein said dc fan IPM module is disposed on said first circuit board or said second circuit board, and wherein said dc fan IPM module is electrically connected to said main controller.
5. The electronic control assembly based on heat dissipation of the compressor liquid storage tank as claimed in any one of claims 1 to 4, further comprising a heat dissipation sheet metal, wherein one side of the heat dissipation sheet metal is fixedly mounted on one side surface of the liquid storage tank, and the other side of the heat dissipation sheet metal is detachably connected with the box body.
6. The electrical control assembly for dissipating heat based on a compressor fluid reservoir of claim 5, further comprising a mounting bracket, wherein the mounting bracket has a first side and a second side opposite to each other, the first side of the mounting bracket is attached to the first circuit board, the compressor IPM module and the rectifier bridge are mounted on the second side of the mounting bracket, and the pins of the compressor IPM module and the pins of the rectifier bridge are fixed to the first circuit board through the mounting bracket;
the box body is provided with an installation window, and the compressor IPM module and the rectifier bridge are attached to the heat dissipation metal plate through the installation window.
7. An outdoor unit, characterized in that, comprising a compressor and the electric control assembly based on heat dissipation of the compressor liquid storage tank as claimed in any one of claims 1 to 6, wherein the compressor is provided with the liquid storage tank, the electric control assembly is fixedly arranged on the outer wall of the liquid storage tank, and a main controller of the electric control assembly is communicated with the indoor unit.
8. The outdoor unit of claim 7, wherein the compressor further has a compressor main body, the liquid tank is provided at one side of the compressor main body, and the box body is installed between the compressor main body and the liquid tank.
9. An air conditioner, comprising an indoor unit and the outdoor unit of any one of claims 7 to 8, wherein the main controller of the outdoor unit is in communication connection with the main control chip of the indoor unit.
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| CN201810466940.8A CN110486851B (en) | 2018-05-14 | 2018-05-14 | Automatically controlled subassembly, off-premises station and air conditioner |
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| CN201810466940.8A CN110486851B (en) | 2018-05-14 | 2018-05-14 | Automatically controlled subassembly, off-premises station and air conditioner |
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| CN111935906A (en) * | 2020-09-18 | 2020-11-13 | 珠海格力电器股份有限公司 | PCB assembly and electrical box |
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