CN214791794U - Controller, air conditioner and high-voltage protection circuit - Google Patents
Controller, air conditioner and high-voltage protection circuit Download PDFInfo
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- CN214791794U CN214791794U CN202120778332.8U CN202120778332U CN214791794U CN 214791794 U CN214791794 U CN 214791794U CN 202120778332 U CN202120778332 U CN 202120778332U CN 214791794 U CN214791794 U CN 214791794U
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Abstract
The embodiment of the application provides a controller, an air conditioner and a high-voltage protection circuit, wherein the controller comprises a first rectifying unit, a power supply conversion unit, an HPS wiring terminal, a low-voltage control unit and a high-voltage working unit; the first end of the input side of the first rectifying unit is electrically connected with the first end of the HPS wiring terminal, and the second end of the HPS wiring terminal can be electrically connected with the first end of the input power supply; the second end of the input side of the first rectifying unit can be electrically connected with the second end of the input power supply; the HPS wiring terminal can be electrically connected with the pressure switch; the output end of the first rectifying unit is electrically connected with the input end of the power supply conversion unit, and converts alternating current into direct current high voltage and outputs the direct current high voltage to the power supply conversion unit; the output end of the power supply conversion unit is electrically connected with the input end of the low-voltage control unit, and the output end of the power supply conversion unit converts the direct-current high-voltage electricity into direct-current low-voltage electricity and outputs the direct-current low-voltage electricity to the power supply end of the low-voltage control unit; the output end of the low-voltage control unit is connected to the control end of the high-voltage working unit. The controller has a high-voltage protection function.
Description
Technical Field
The utility model relates to a circuit control field, in particular to controller, air conditioner and high-voltage protection circuit of relevant high-voltage protection.
Background
In the air conditioner operation process, the air conditioner damage can be caused to the pressure of compressor is too big, and the refrigerant in the refrigerant pipe is revealed, causes the pollution to the environment, more seriously can cause the incident, consequently, is provided with high-pressure protection device on the refrigerating system's of air conditioner refrigerant pipe usually, and high-pressure protection device is including being the pressure switch who sets up on the refrigerant pipe usually.
SUMMERY OF THE UTILITY MODEL
Based on this, the embodiment of the application provides a controller, air conditioner and high-voltage protection circuit, can realize high-voltage protection.
In order to achieve the above object, the embodiment of the present invention provides the following technical solutions:
a controller is used for controlling an air conditioner and comprises a first rectifying unit, a power supply conversion unit, an HPS wiring terminal, a low-voltage control unit and a high-voltage working unit;
the first end of the input side of the first rectifying unit is electrically connected with the first end of the HPS wiring terminal, and the second end of the HPS wiring terminal can be electrically connected with the first end of the input power supply; the second end of the input side of the first rectifying unit can be electrically connected with the second end of the input power supply; the HPS wiring terminal can be electrically connected with the pressure switch; the output end of the first rectifying unit is electrically connected with the input end of the power supply conversion unit, and converts alternating current into direct current high voltage electricity to be output to the power supply conversion unit; the output end of the power supply conversion unit is electrically connected with the input end of the low-voltage control unit, and the direct-current high-voltage power is converted into direct-current low-voltage power which is output to the power supply end of the low-voltage control unit to supply power for the low-voltage control unit; and the output end of the low-voltage control unit is connected to the control end of the high-voltage working unit to control the high-voltage working unit to work.
In one embodiment, the low voltage control unit comprises an MCU subunit and/or an IPM driver subunit and/or a PFC driver subunit, and the high voltage working unit comprises a PFC subunit and an inverter subunit; the input end of the PFC subunit is electrically connected with the output end of the first rectifying unit, and the output end of the PFC subunit is electrically connected with the input end of the inverter subunit;
a first signal output end of the MCU subunit is electrically connected with the PFC driving subunit and sends a first control signal to the PFC driving subunit; the PFC driving subunit is electrically connected with a control end of the PFC subunit, and the PFC subunit is controlled to work according to the first control signal; and/or the presence of a gas in the gas,
the second signal output end of the MCU subunit is electrically connected with the IPM drive subunit and sends a second control signal to the IPM drive subunit; and the IPM driving subunit is electrically connected with the control end of the inverter subunit and controls the inverter subunit to work according to the second control signal.
In one embodiment, a second rectifying unit is further included; the low-voltage control unit comprises an MCU subunit and/or an IPM drive subunit and/or a PFC drive subunit, and the high-voltage working unit comprises a PFC subunit and an inversion subunit; the input end of the PFC subunit is electrically connected with the output end of the second rectifying unit, and the output end of the PFC subunit is electrically connected with the input end of the inverter subunit;
a first signal output end of the MCU subunit is electrically connected with the PFC driving subunit and sends a first control signal to the PFC driving subunit; the PFC driving subunit is electrically connected with a control end of the PFC subunit, and the PFC subunit is controlled to work according to the first control signal; and/or the presence of a gas in the gas,
the second signal output end of the MCU subunit is electrically connected with the IPM drive subunit and sends a second control signal to the IPM drive subunit; and the IPM driving subunit is electrically connected with the control end of the inverter subunit and controls the inverter subunit to work according to the second control signal.
In one embodiment, the power conversion unit includes a flyback converter circuit.
In one embodiment, the flyback converter further comprises a DC/DC conversion unit, wherein the output end of the flyback conversion circuit is electrically connected with the input end of the DC/DC conversion unit, and the output end of the DC/DC conversion unit is electrically connected with the power supply end of the low-voltage control unit.
In one embodiment, the PFC sub-unit includes a boost circuit.
The embodiment of the application also provides an air conditioner, which comprises a compressor, a condenser, a throttling device, an evaporator and the controller, wherein a high-pressure working unit of the controller is electrically connected with the compressor and used for controlling the compressor; the pressure switch is arranged on a refrigerant pipe between the compressor and the condenser.
The embodiment of the application also provides a high-voltage protection circuit, which comprises a first rectifying unit, a power supply conversion unit, a pressure switch, a low-voltage control unit and a high-voltage working unit;
the first input side end of the first rectifying unit is electrically connected with the first end of the pressure switch, and the second end of the pressure switch can be electrically connected with the first end of the input power supply; the second end of the input side of the first rectifying unit can be electrically connected with the second end of the input power supply; the output end of the first rectifying unit is electrically connected with the input end of the power supply conversion unit, and converts alternating current into direct current high voltage electricity to be output to the power supply conversion unit; the output end of the power supply conversion unit is electrically connected with the input end of the low-voltage control unit, and the direct-current high-voltage power is converted into direct-current low-voltage power which is output to the power supply end of the low-voltage control unit to supply power for the low-voltage control unit; and the output end of the low-voltage control unit is connected to the control end of the high-voltage working unit to control the high-voltage working unit to work.
In one embodiment, the low voltage control unit comprises an MCU subunit and/or an IPM driver subunit and/or a PFC driver subunit, and the high voltage working unit comprises a PFC subunit and an inverter subunit; the input end of the PFC subunit is electrically connected with the output end of the first rectifying unit, and the output end of the PFC subunit is electrically connected with the input end of the inverter subunit;
a first signal output end of the MCU subunit is electrically connected with the PFC driving subunit and sends a first control signal to the PFC driving subunit; the PFC driving subunit is electrically connected with a control end of the PFC subunit, and the PFC subunit is controlled to work according to the first control signal; and/or the presence of a gas in the gas,
the second signal output end of the MCU subunit is electrically connected with the IPM drive subunit and sends a second control signal to the IPM drive subunit; and the IPM driving subunit is electrically connected with the control end of the inverter subunit and controls the inverter subunit to work according to the second control signal.
In one embodiment, a second rectifying unit is further included; the low-voltage control unit comprises an MCU subunit and/or an IPM drive subunit and/or a PFC drive subunit, and the high-voltage working unit comprises a PFC subunit and an inversion subunit; the input end of the PFC subunit is electrically connected with the output end of the second rectifying unit, and the output end of the PFC subunit is electrically connected with the input end of the inverter subunit;
a first signal output end of the MCU subunit is electrically connected with the PFC driving subunit and sends a first control signal to the PFC driving subunit; the PFC driving subunit is electrically connected with a control end of the PFC subunit, and the PFC subunit is controlled to work according to the first control signal; and/or the presence of a gas in the gas,
the second signal output end of the MCU subunit is electrically connected with the IPM drive subunit and sends a second control signal to the IPM drive subunit; and the IPM driving subunit is electrically connected with the control end of the inverter subunit and controls the inverter subunit to work according to the second control signal.
The controller provided by the embodiment of the application comprises a first rectifying unit, a power conversion unit, an HPS wiring terminal, a low-voltage control unit and a high-voltage working unit; the HPS wiring terminal is connected between the input power supply and the first rectifying unit, when the system generates high voltage, the two ends of the HPS wiring terminal are disconnected, the input end of the first rectifying unit is not provided with voltage input, the power supply conversion unit and the low-voltage control unit circuit behind the output end of the first rectifying unit lose working power supply, and the low-voltage control unit cannot continue to provide control signals for the high-voltage working unit, so that the whole controller stops working, and high-voltage protection is realized.
The air conditioner provided by the embodiment of the application comprises the controller, and the high-voltage protection function can be realized.
The high-voltage protection circuit that this application embodiment provided, with pressure switch access input power and first rectifier unit between, when the system takes place the high pressure, pressure switch disconnection that opens circuit, first rectifier unit input does not have voltage input, power conversion unit behind the first rectifier unit output, low pressure control unit circuit all lose working power, low pressure control unit then can't continue to provide control signal for high pressure working unit, thereby make whole controller stop work, also can realize high-voltage protection function.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present invention, the drawings required to be used in the description of the embodiments or the background art will be briefly introduced below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a block circuit diagram of a controller disclosed herein;
FIG. 2 is a schematic circuit diagram of a controller according to an embodiment of the present disclosure;
FIG. 3 is a schematic circuit diagram of a controller according to another embodiment of the present disclosure;
FIG. 4 is a schematic circuit diagram of a controller according to another embodiment of the present disclosure;
FIG. 5 is a schematic diagram of an air conditioning system;
fig. 6 is a schematic diagram of a high-voltage protection circuit according to an embodiment of the present application.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In this application, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
As shown in fig. 5, a refrigeration apparatus, such as an air conditioning system, generally includes a compressor M1, a gas-liquid separator M2, a condenser M3, a throttling device M4, and an evaporator M5. The outlet end of the compressor M1 is connected to the inlet end of the condenser M3 through a refrigerant pipe, the outlet end of the condenser M3 is connected to the inlet end of a throttling device M4 through a refrigerant pipe, the outlet end of the throttling device M4 is connected to the inlet end of an evaporator M5, the outlet end of the evaporator M5 is connected to the inlet end of a gas-liquid separator M2, the outlet end of the gas-liquid separator M2 is connected to the inlet end of a compressor M1, a refrigeration circuit is formed, and refrigerant circulates in the refrigeration circuit. Wherein, the gas-liquid separator M2 can be a compressor M1 and can also be a liquid storage tank. If the pressure of the compressor is too high, the air conditioner may be damaged, and the refrigerant in the refrigerant pipe may leak, thereby causing environmental pollution, and more seriously, safety accidents may be caused. Therefore, a pressure switch is often arranged at the outlet of the compressor to monitor the pressure of the compressor, and when the pressure is too high, the operation of the air conditioner is stopped, so that high-pressure damage is prevented. Optionally, the pressure switch is disposed on the refrigerant pipe from the outlet end of the compressor M1 to the inlet end of the condenser M3.
In order to implement high voltage protection, the present embodiment provides a controller for controlling an air conditioner, as shown in fig. 1, including a first rectifying unit 11, a power conversion unit 12, an HPS (high voltage switch) terminal 10, a low voltage control unit 13, and a high voltage operating unit 14;
wherein, the first end of the input side of the first rectifying unit 11 is electrically connected with the first end of the HPS wiring terminal 10, and the second end of the HPS wiring terminal 10 can be electrically connected with the first end of the input power AC; the HPS connection terminal 10 can be electrically connected to a pressure switch, that is, the HPS connection terminal 10 receives switch information of the pressure switch provided in the air conditioning system, and is turned on and off according to the turning on and off of the pressure switch; the second end of the input side of the first rectifying unit 11 can be electrically connected with the second end of the input power supply AC; the output end of the first rectifying unit 11 is electrically connected with the input end of the power conversion unit 12, and converts alternating current into direct current high voltage electricity to be output to the power conversion unit 12; the output end of the power supply conversion unit 12 is electrically connected with the input end of the low-voltage control unit 13, and converts the direct-current high-voltage electricity into direct-current low-voltage electricity which is output to the power supply end of the low-voltage control unit 13 to supply power to the low-voltage control unit 13; the output end of the low-voltage control unit 13 is connected to the control end of the high-voltage working unit 14 to control the high-voltage working unit 14 to work; specifically, the operating voltage of the high-voltage operating unit 14 is provided by the input power AC, specifically, the input power AC can be directly supplied with rectified dc high-voltage power, and the supply voltage of the high-voltage operating unit 14 is higher than the supply voltage of the low-voltage control unit 13; the high-pressure working unit 14 is at least used for controlling the compressor, and the output end of the high-pressure working unit is connected to the input end of the air conditioner compressor; the high-voltage working unit 14 is powered by direct current high voltage and is controlled by a control signal output by the low-voltage control unit 13, the high-voltage working unit 14 cannot work when the direct current high voltage of the power supply is lost or the control signal output by the low-voltage control unit 13 is lost, and further, the compressor stops running, and the air conditioner does not work any more.
In this embodiment, the HPS connection terminal 10 is connected in series between the input power AC and the first rectifying unit 11, and the switching signal of the pressure switch is connected to the controller through the HPS connection terminal 10. When the pressure of the air conditioning system is too high, the pressure switch is turned off, then the two ends of the HPS wiring terminal 10 are equivalent to open circuits, at this time, the power supply loop of the input power supply AC is disconnected, the first rectifying unit 11, the power conversion unit 12 and the low-voltage control unit 13 stop working after losing power, the low-voltage control unit 13 cannot provide a control signal for the high-voltage working unit 14 to supply the high-voltage working unit 14 to work, the high-voltage working unit 14 stops working, the compressor driven and controlled by the high-voltage working unit 14 stops working, and therefore the whole air conditioning system also stops working, and high-voltage protection of the air conditioning system is achieved. When the pressure recovers or the air conditioner works normally, the pressure switch is closed, the two ends of the HPS wiring terminal 10 are equivalent to short circuit, at this time, the power supply loop of the input power supply AC is closed, the first rectifying unit 11, the power conversion unit 12 and the low-voltage control unit 13 are powered on to work, the low-voltage control unit 13 provides a control signal for the high-voltage working unit 14, the high-voltage working unit 14 works normally, the compressor is driven to run, the whole air conditioning system also works normally, and the control of the air conditioning system is realized.
In some occasions, in order to realize high-voltage protection, a pressure switch is used for generating a switching signal and outputting the switching signal to a controllable switch, such as a relay and the like; when the system pressure is too high, the pressure switch generates a disconnected switch signal, and the controllable switch controls the low-voltage control unit to stop outputting the control signal according to the disconnected switch signal generated by the pressure switch, so that the low-voltage control unit is prevented from outputting the control signal to the high-voltage working unit; compared with the high-voltage protection mode, the controller provided by the embodiment of the application can directly introduce the switch signal generated by the pressure switch into the power supply side of the low-voltage control unit through the HPS wiring terminal, and the switch signal can be used for controlling the connection and disconnection of the input power supply, so that the power-on and power-off of the low-voltage control unit are controlled, whether the low-voltage control unit outputs the control signal to the high-voltage working unit or not is further controlled, and whether the system normally operates or not is finally controlled. Specifically, when the system is in high voltage, two ends of the HPS wiring terminal are disconnected, the low-voltage control unit loses power supply, the control signal is stopped being output to the high-voltage working unit, and the system stops running; when the system pressure is normal, two ends of the HPS wiring terminal are connected, the low-voltage control unit is electrified to work, a control signal is output to the high-voltage working unit, and the system operates normally.
In one embodiment, as shown in fig. 2, the high voltage operating unit 14 includes a PFC (Power Factor Correction) subunit 141 and an inverter subunit 142; the input end of the PFC subunit 141 is electrically connected to the output end of the first rectifying unit 11, and the output end of the PFC subunit 141 is electrically connected to the input end of the inverting subunit 142; in this embodiment, the power supplies of the high-voltage operating unit 14 and the low-voltage control unit 13 are both provided by the dc high voltage output by the first rectifying unit, and when the system generates a high voltage, the HPS wiring terminal 10 is disconnected, and the high-voltage operating unit 14 and the low-voltage control unit 13 both lose the power supply voltage and stop working, thereby preventing a high-voltage hazard from occurring.
Further, in order to realize the control of the PFC subunit and the inverter subunit, as shown in fig. 4, the low voltage control unit 13 includes an MCU (microcontroller unit) subunit 131, an IPM (Intelligent Power Module) driving subunit 133 and a PFC driving subunit 132, wherein a first signal output end of the MCU subunit 131 is electrically connected to the PFC driving subunit 132, and sends a first control signal to the PFC driving subunit 132; the PFC driving sub-unit 132 is electrically connected to the control end of the PFC sub-unit 141, and controls the PFC sub-unit 141 to operate according to the first control signal; the second signal output end of the MCU subunit 131 is electrically connected to the IPM driver subunit 133, and transmits a second control signal to the IPM driver subunit 133; the IPM driving subunit 133 is electrically connected to the control end of the inverter subunit 142, and controls the inverter subunit 142 to operate according to the second control signal; specifically, the control methods of the PFC and the IPM may be stored in the MCU subunit 131, which is not limited in this application. In this embodiment, when the system generates a high voltage, the HPS terminal is disconnected, the mcu (microcontroller unit) subunit 131, the IPM (Intelligent Power Module) driving subunit 133, and the PFC driving subunit 132 lose Power supplies, and thus cannot provide control signals to the PFC subunit 141 and the inverter subunit 142, and the PFC subunit 141 and the inverter subunit 142 stop working, and the system stops operating until the pressure recovers or the system restarts.
Further, in an embodiment, the power supply of the high-voltage working unit and the low-voltage control unit is from different rectification units, and in this embodiment, as shown in fig. 3 or 4, the controller further includes a second rectification unit 21; the low-voltage control unit 13 comprises an MCU subunit 131 and/or an IPM driver subunit 133 and/or a PFC driver subunit 132, and the high-voltage working unit 14 comprises a PFC subunit 141 and an inverter subunit 142; the input end of the PFC subunit 141 is electrically connected to the output end of the second rectifying unit 21, and the output end of the PFC subunit 141 is electrically connected to the input end of the inverter subunit 142; in this embodiment, the low voltage control unit is supplied with voltage from the first rectifying unit 11, and the high voltage operation unit is supplied with voltage from the second rectifying unit 21. When the system generates high voltage, the HPS wiring terminal connected between the input power AC and the first rectifying unit 11 is equivalent to open circuit, the low-voltage control unit loses power and stops providing control signals for the high-voltage working unit, and the high-voltage working unit stops working; however, because the power supply voltage of the high-voltage operating unit is provided by the second rectifying unit 21, the power supply circuit is still a path, so that the high-voltage operating unit only loses the control signal and does not lose the power supply, and when the system pressure returns to normal, the normal operation can be recovered in time.
In the above embodiments, the supply voltage of the low-voltage control unit often includes one or more of 3.3V, 5V, 12V, 15V and 24V, and in order to convert the dc high voltage output by the first rectification unit 11 into a dc low voltage, the power conversion unit may be configured to include a flyback converter circuit, as shown in fig. 4; further, a DC/DC conversion unit 15 may be further disposed in the controller, an output end of the flyback conversion circuit is electrically connected to an input end of the DC/DC conversion unit 15, and an output end of the DC/DC conversion unit 15 is electrically connected to a power supply end of the low-voltage control unit 13; the output voltage of the flyback converter circuit can be regulated or regulated to a suitable low voltage by the DC/DC conversion unit 15 as required, so as to supply power to the MCU subunit 131 and/or the IPM driver subunit 133 and/or the PFC driver subunit 132.
Further, in the above-described embodiment, the PFC sub-unit 141 may be provided as a boost circuit.
Based on the controller with the high-pressure protection function, an embodiment of the present application further provides an air conditioner, as shown in fig. 5, including a compressor, a condenser, a throttling device, an evaporator, and the controller, where a high-pressure operating unit 14 of the controller is electrically connected to the compressor and is used for controlling the compressor; the pressure switch of the system is arranged on a refrigerant pipe between the compressor M1 and the condenser M3. Under normal conditions, the pressure switch is closed; when the system is under high pressure, the pressure switch is switched off and is conducted into the controller through the HPS wiring terminal of the controller, and the controller loses a power supply or loses control because the two ends of the HPS wiring terminal are disconnected, so that the system stops running, and high-voltage protection is realized. When the pressure returns to normal, the pressure switch is closed and is conducted into the controller through the HPS wiring terminal of the controller, and the controller works normally because the passages at the two ends of the HPS wiring terminal obtain a power supply and a control signal, so that the system runs normally.
Based on the above controller, the embodiment of the present application further provides a high-voltage protection circuit, which is suitable for a refrigeration system, such as an air conditioner, where the refrigeration system is provided with a pressure switch, and specifically, the pressure switch may be disposed on a refrigerant pipe between the compressor M1 and the condenser M3, or may be disposed at an outlet end of the compressor M1; the pressure switch is closed when the system pressure is normal, and is opened if the system pressure is overhigh.
As shown in fig. 6, the high-voltage protection circuit includes a first rectifying unit 11, a power conversion unit 12, a pressure switch 100, a low-voltage control unit 13, and a high-voltage operating unit 14;
a first input side end of the first rectifying unit 11 is electrically connected with a first end of the pressure switch 100, and a second end of the pressure switch 100 can be electrically connected with a first end of an input power supply AC; the second end of the input side of the first rectifying unit 11 can be electrically connected with the second end of the input power supply AC; the output end of the first rectifying unit 11 is electrically connected with the input end of the power conversion unit 12, and converts alternating current into direct current high voltage electricity to be output to the power conversion unit 12; the output end of the power supply conversion unit 12 is electrically connected with the input end of the low-voltage control unit 13, and converts the direct-current high-voltage electricity into direct-current low-voltage electricity which is output to the power supply end of the low-voltage control unit 13 to supply power to the low-voltage control unit 13; the output end of the low-voltage control unit 13 is connected to the control end of the high-voltage working unit 14, and the high-voltage working unit 14 is controlled to work; the operating voltage of the high voltage operating unit 14 is provided by the input power supply. In this embodiment, if the system pressure is too high, the pressure switch is turned off, the low-voltage control unit 13 loses power, the control signal is stopped being provided to the high-voltage working unit, and the system stops operating.
In one embodiment, the low voltage control unit 13 includes an MCU subunit 131 and/or an IPM driving subunit 133 and/or a PFC driving subunit 132, the high voltage operation unit 14 includes a PFC subunit 141 and an inverter subunit 142, and the inverter subunit 142 is connected to a compressor of the refrigeration system and controls the operation of the compressor; the input end of the PFC subunit 141 is electrically connected to the output end of the first rectifying unit 11, and the output end of the PFC subunit 141 is electrically connected to the input end of the inverting subunit 142; a first signal output end of the MCU subunit 131 is electrically connected to the PFC driving subunit 132, and transmits a first control signal to the PFC driving subunit 132; the PFC driving sub-unit 132 is electrically connected to the control terminal of the PFC sub-unit 141, and controls the PFC sub-unit 141 to operate according to the first control signal; the second signal output end of the MCU subunit 131 is electrically connected to the IPM driver subunit 133, and sends a second control signal to the IPM driver subunit 133; the IPM driving subunit 133 is electrically connected to the control end of the inverter subunit 142, and controls the inverter subunit 142 to operate according to the second control signal.
Further, in one embodiment, a second rectifying unit 21 is further included; the low-voltage control unit 13 comprises an MCU subunit 131 and/or an IPM driver subunit 133 and/or a PFC driver subunit 132, and the high-voltage working unit 14 comprises a PFC subunit 141 and an inverter subunit 142; the input end of the PFC subunit 141 is electrically connected to the output end of the second rectifying unit 21, and the output end of the PFC subunit 141 is electrically connected to the input end of the inverter subunit 142;
a first signal output end of the MCU subunit 131 is electrically connected to the PFC driving subunit 132, and transmits a first control signal to the PFC driving subunit 132; the PFC driving sub-unit 132 is electrically connected to the control terminal of the PFC sub-unit 141, and controls the PFC sub-unit 141 to operate according to the first control signal; and/or, a second signal output terminal of the MCU subunit 131 is electrically connected to the IPM driver subunit 133, and sends a second control signal to the IPM driver subunit 133; the IPM driving subunit 133 is electrically connected to the control end of the inverter subunit 142, and controls the inverter subunit 142 to operate according to the second control signal.
The high-voltage protection circuit provided by the embodiment of the application has the advantages provided by the controller, and the high-voltage protection of a system can be realized.
The embodiments in the present specification are described in a progressive manner, and the same and similar parts among the embodiments are referred to each other, and each embodiment focuses on the differences from the other embodiments. In particular, the system or system embodiments are substantially similar to the method embodiments and therefore are described in a relatively simple manner, and reference may be made to some of the descriptions of the method embodiments for related points. The above-described system and system embodiments are only illustrative, wherein the units described as separate parts may or may not be physically separate, and the parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. A controller is used for controlling an air conditioner and is characterized by comprising a first rectifying unit, a power supply conversion unit, an HPS wiring terminal, a low-voltage control unit and a high-voltage working unit;
the first end of the input side of the first rectifying unit is electrically connected with the first end of the HPS wiring terminal, and the second end of the HPS wiring terminal can be electrically connected with the first end of the input power supply; the second end of the input side of the first rectifying unit can be electrically connected with the second end of the input power supply; the HPS wiring terminal can be electrically connected with the pressure switch; the output end of the first rectifying unit is electrically connected with the input end of the power supply conversion unit, and converts alternating current into direct current high voltage electricity to be output to the power supply conversion unit; the output end of the power supply conversion unit is electrically connected with the input end of the low-voltage control unit, and the direct-current high-voltage power is converted into direct-current low-voltage power which is output to the power supply end of the low-voltage control unit to supply power for the low-voltage control unit; and the output end of the low-voltage control unit is connected to the control end of the high-voltage working unit to control the high-voltage working unit to work.
2. The controller according to claim 1, wherein the low voltage control unit comprises an MCU sub-unit and/or an IPM driver sub-unit and/or a PFC driver sub-unit, and the high voltage working unit comprises a PFC sub-unit and an inverter sub-unit; the input end of the PFC subunit is electrically connected with the output end of the first rectifying unit, and the output end of the PFC subunit is electrically connected with the input end of the inverter subunit;
a first signal output end of the MCU subunit is electrically connected with the PFC driving subunit and sends a first control signal to the PFC driving subunit; the PFC driving subunit is electrically connected with a control end of the PFC subunit, and the PFC subunit is controlled to work according to the first control signal; and/or the presence of a gas in the gas,
the second signal output end of the MCU subunit is electrically connected with the IPM drive subunit and sends a second control signal to the IPM drive subunit; and the IPM driving subunit is electrically connected with the control end of the inverter subunit and controls the inverter subunit to work according to the second control signal.
3. The controller of claim 1, further comprising a second rectifying unit; the low-voltage control unit comprises an MCU subunit and/or an IPM drive subunit and/or a PFC drive subunit, and the high-voltage working unit comprises a PFC subunit and an inversion subunit; the input end of the PFC subunit is electrically connected with the output end of the second rectifying unit, and the output end of the PFC subunit is electrically connected with the input end of the inverter subunit;
a first signal output end of the MCU subunit is electrically connected with the PFC driving subunit and sends a first control signal to the PFC driving subunit; the PFC driving subunit is electrically connected with a control end of the PFC subunit, and the PFC subunit is controlled to work according to the first control signal; and/or the presence of a gas in the gas,
the second signal output end of the MCU subunit is electrically connected with the IPM drive subunit and sends a second control signal to the IPM drive subunit; and the IPM driving subunit is electrically connected with the control end of the inverter subunit and controls the inverter subunit to work according to the second control signal.
4. The controller according to any one of claims 1-3, wherein the power conversion unit comprises a flyback converter circuit.
5. The controller according to claim 4, further comprising a DC/DC conversion unit, wherein the output end of the flyback conversion circuit is electrically connected to the input end of the DC/DC conversion unit, and the output end of the DC/DC conversion unit is electrically connected to the power supply end of the low voltage control unit.
6. The controller of claim 2 or 3, wherein the PFC subunit comprises a boost circuit.
7. An air conditioner comprising a compressor, a condenser, a throttling device and an evaporator, and further comprising a controller according to any one of claims 1 to 6, wherein a high-pressure working unit of the controller is electrically connected with the compressor for controlling the compressor; the pressure switch is arranged on a refrigerant pipe between the compressor and the condenser.
8. A high-voltage protection circuit is characterized by comprising a first rectifying unit, a power supply conversion unit, a pressure switch, a low-voltage control unit and a high-voltage working unit;
the first input side end of the first rectifying unit is electrically connected with the first end of the pressure switch, and the second end of the pressure switch can be electrically connected with the first end of the input power supply; the second end of the input side of the first rectifying unit can be electrically connected with the second end of the input power supply; the output end of the first rectifying unit is electrically connected with the input end of the power supply conversion unit, and converts alternating current into direct current high voltage electricity to be output to the power supply conversion unit; the output end of the power supply conversion unit is electrically connected with the input end of the low-voltage control unit, and the direct-current high-voltage power is converted into direct-current low-voltage power which is output to the power supply end of the low-voltage control unit to supply power for the low-voltage control unit; and the output end of the low-voltage control unit is connected to the control end of the high-voltage working unit to control the high-voltage working unit to work.
9. The high voltage protection circuit according to claim 8, wherein the low voltage control unit comprises an MCU subunit and/or an IPM driver subunit and/or a PFC driver subunit, and the high voltage working unit comprises a PFC subunit and an inverter subunit; the input end of the PFC subunit is electrically connected with the output end of the first rectifying unit, and the output end of the PFC subunit is electrically connected with the input end of the inverter subunit;
a first signal output end of the MCU subunit is electrically connected with the PFC driving subunit and sends a first control signal to the PFC driving subunit; the PFC driving subunit is electrically connected with a control end of the PFC subunit, and the PFC subunit is controlled to work according to the first control signal; and/or the presence of a gas in the gas,
the second signal output end of the MCU subunit is electrically connected with the IPM drive subunit and sends a second control signal to the IPM drive subunit; and the IPM driving subunit is electrically connected with the control end of the inverter subunit and controls the inverter subunit to work according to the second control signal.
10. The high-voltage protection circuit according to claim 8, further comprising a second rectifying unit; the low-voltage control unit comprises an MCU subunit and/or an IPM drive subunit and/or a PFC drive subunit, and the high-voltage working unit comprises a PFC subunit and an inversion subunit; the input end of the PFC subunit is electrically connected with the output end of the second rectifying unit, and the output end of the PFC subunit is electrically connected with the input end of the inverter subunit;
a first signal output end of the MCU subunit is electrically connected with the PFC driving subunit and sends a first control signal to the PFC driving subunit; the PFC driving subunit is electrically connected with a control end of the PFC subunit, and the PFC subunit is controlled to work according to the first control signal; and/or the presence of a gas in the gas,
the second signal output end of the MCU subunit is electrically connected with the IPM drive subunit and sends a second control signal to the IPM drive subunit; and the IPM driving subunit is electrically connected with the control end of the inverter subunit and controls the inverter subunit to work according to the second control signal.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120778332.8U CN214791794U (en) | 2021-04-16 | 2021-04-16 | Controller, air conditioner and high-voltage protection circuit |
| PCT/CN2022/086148 WO2022218266A1 (en) | 2021-04-16 | 2022-04-11 | Controller, air conditioner, and high-voltage protection circuit |
| US17/877,222 US20220381497A1 (en) | 2021-04-16 | 2022-07-29 | Controller, air conditioner, and high-pressure protection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120778332.8U CN214791794U (en) | 2021-04-16 | 2021-04-16 | Controller, air conditioner and high-voltage protection circuit |
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| Publication Number | Publication Date |
|---|---|
| CN214791794U true CN214791794U (en) | 2021-11-19 |
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| CN202120778332.8U Active CN214791794U (en) | 2021-04-16 | 2021-04-16 | Controller, air conditioner and high-voltage protection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022218266A1 (en) * | 2021-04-16 | 2022-10-20 | 杭州先途电子有限公司 | Controller, air conditioner, and high-voltage protection circuit |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022218266A1 (en) * | 2021-04-16 | 2022-10-20 | 杭州先途电子有限公司 | Controller, air conditioner, and high-voltage protection circuit |
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