CN110410990B - Automatically controlled board of cross valve and air conditioner - Google Patents
Automatically controlled board of cross valve and air conditioner Download PDFInfo
- Publication number
- CN110410990B CN110410990B CN201910622850.8A CN201910622850A CN110410990B CN 110410990 B CN110410990 B CN 110410990B CN 201910622850 A CN201910622850 A CN 201910622850A CN 110410990 B CN110410990 B CN 110410990B
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- way valve
- switch
- bridge arm
- resistor
- circuit
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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
- F24F11/00—Control or safety arrangements
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
- F24F11/80—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air
- F24F11/83—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers
- F24F11/84—Control systems characterised by their outputs; Constructional details thereof for controlling the temperature of the supplied air by controlling the supply of heat-exchange fluids to heat-exchangers using valves
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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
- F24F11/00—Control or safety arrangements
- F24F11/88—Electrical aspects, e.g. circuits
Abstract
The invention discloses a four-way valve electric control board and an air conditioner, comprising an electric control board and a four-way valve driving circuit arranged on the electric control board, wherein the circuit comprises: the H-bridge switching circuit comprises a first bridge arm switching circuit and a second bridge arm switching circuit, wherein an upper bridge arm switch of the first bridge arm circuit works when receiving a first switch driving signal so as to drive the alternating-current four-way valve to work; or the upper bridge arm switch of the first bridge arm circuit drives the lower bridge arm switch of the second bridge arm circuit to be conducted when being conducted so as to output the positive power supply to the direct-current four-way valve through the direct-current four-way valve access end; and when the upper bridge arm switch of the second bridge arm circuit is conducted, the lower bridge arm switch of the first bridge arm circuit is driven to be conducted, so that the negative power supply is output to the direct-current four-way valve through the connecting end of the direct-current four-way valve. The invention improves the compatibility of the four-way valve electric control board.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a four-way valve electric control plate and an air conditioner.
Background
The four-way valve is divided into an alternating current four-way valve and a direct current four-way valve, driving power supplies of the alternating current four-way valve and the direct current four-way valve are also divided into an alternating current driving power supply and a direct current driving power supply, generally, the driving control circuits and the driving power supplies of the alternating current four-way valve and the direct current driving power supplies are required to be independent, and the alternating. Two driving control circuits are usually required to be designed on the same PCB for two four-way valves, so that the occupied PCB space is large, and the reduction of the size of the air conditioner is not facilitated. Or two corresponding PCB boards are designed aiming at two four-way valve boards, so that at least one electric control board is required to be matched with each four-way valve, the universality of the electric control board is low, and the development efficiency of enterprises is reduced.
Disclosure of Invention
The invention mainly aims to provide a four-way valve electric control board and an air conditioner, and aims to improve the compatibility of the four-way valve electric control board.
In order to achieve the above object, the present invention provides an electric control board for a four-way valve, including an electric control board and a four-way valve electric control board disposed on the electric control board, wherein the four-way valve driving circuit includes:
the AC four-way valve access end is used for accessing the AC four-way valve;
the direct-current four-way valve is connected to the input end and is used for connecting the direct-current four-way valve;
the driving power switch control circuit works when receiving the first control signal and outputs a first switch driving signal;
the negative power switch driving circuit works when receiving the second control signal and outputs a second switch driving signal;
the H-bridge switching circuit comprises a first bridge arm switching circuit and a second bridge arm switching circuit, and when an alternating-current four-way valve is connected to the connecting end of the alternating-current four-way valve, an upper bridge arm switch of the first bridge arm switching circuit works when receiving the first switch driving signal so as to drive the alternating-current four-way valve to work;
when the direct-current four-way valve is connected to the connecting end of the direct-current four-way valve, the upper bridge arm switch of the first bridge arm switch circuit works when receiving the first switch driving signal, and drives the lower bridge arm switch of the second bridge arm switch circuit to be connected when being connected, so that a forward power supply is output to the direct-current four-way valve through the connecting end of the direct-current four-way valve; and the number of the first and second groups,
and the upper bridge arm switch of the second bridge arm switch circuit works when receiving the second switch driving signal and drives the lower bridge arm switch of the first bridge arm switch circuit to be conducted when being conducted so as to output a negative power supply to the direct-current four-way valve through the direct-current four-way valve access end.
Optionally, the driving power switch control circuit includes a forward control signal amplification unit and a forward switch driving unit, a controlled end of the control signal amplification unit is used for accessing the first control signal, an output end of the forward control signal amplification unit is connected with a controlled end of the forward switch driving unit, an input end of the forward switch driving unit is accessed with a switch driving signal, and an output end of the forward switch driving unit is connected with an upper bridge arm switch of the first bridge arm switching circuit and a lower bridge arm switch of the second bridge arm switching circuit respectively.
Optionally, the forward control signal amplifying unit includes a first switching tube, a first resistor and a second resistor, a first end of the first resistor is a controlled end of the forward control signal amplifying unit, and a second end of the first resistor is interconnected with the controlled end of the first switching tube and a first end of the second resistor; the input end of the first switch tube and the second end of the second resistor are both grounded, and the output end of the first switch tube is the output end of the forward control signal amplification unit;
and/or, the forward switch drive unit includes second switch tube, third resistance, fourth resistance and fifth resistance, the first end of third resistance is the controlled end of forward switch drive unit, and with the first end of fourth resistance is connected, the second end of third resistance with the controlled end of second switch tube with the first end of fifth resistance is connected, the input of second switch tube, the second end of fourth resistance and the second end of fifth resistance and first direct current power supply interconnect.
Optionally, the negative power switch driving circuit includes a third switching tube, a sixth resistor, and a seventh resistor, where a first end of the sixth resistor is a controlled end of the negative power switch driving circuit, and a second end of the sixth resistor is interconnected with the controlled end of the third switching tube and a first end of the seventh resistor; the input end of the third switching tube and the second end of the seventh resistor are both grounded, and the output end of the third switching tube is the output end of the negative power switch driving circuit.
Optionally, the negative polarity power switch driving circuit further includes a first pull-up resistor, a first end of the first pull-up resistor is connected to a first dc power supply, and a second end of the first pull-up resistor is connected to the controlled end of the upper arm switch of the second arm switch circuit.
Optionally, an upper bridge arm switch in the first bridge arm switch circuit includes a first relay, a first end of a coil of the first relay is connected with an output end of the driving power supply switch control circuit, a second end of the coil of the first relay is grounded, a movable contact of the first relay is connected with an access end of the alternating-current four-way valve and an access end of the direct-current four-way valve, and a stationary contact of the first relay is connected with a second direct-current power supply and an alternating-current power supply;
a lower bridge arm switch in the first bridge arm switch circuit comprises a fourth switch tube, an eighth resistor and a ninth resistor, wherein a first end of the eighth resistor is connected with an output end of the negative polarity power switch driving circuit, and a second end of the eighth resistor is interconnected with a controlled end of the fourth switch tube and a first end of the ninth resistor; the input end of the fourth switching tube is connected with the direct-current four-way valve; and the output end of the fourth switching tube and the second end of the ninth resistor are grounded.
Optionally, the four-way valve driving circuit further includes a first absorption circuit, and the first absorption circuit is connected in parallel with the first relay.
Optionally, an upper bridge arm switch in the second bridge arm switch circuit includes a fifth switch tube, a tenth resistor and an eleventh resistor, a first end of the tenth resistor is connected to the output end of the driving power switch control circuit, and a second end of the tenth resistor is interconnected with the controlled end of the fifth switch tube and a first end of the eleventh resistor; the input end of the fifth switching tube is interconnected with the second end of the eleventh resistor and a second direct-current power supply; the output end of the fifth switching tube is connected with the direct-current four-way valve;
and/or a lower bridge arm switch in the first bridge arm switch circuit comprises a sixth switch tube, a twelfth resistor and a thirteenth resistor, wherein a first end of the twelfth resistor is connected with an output end of an upper bridge arm switch of the first bridge arm switch circuit, and a second end of the twelfth resistor is connected with a controlled end of the sixth switch tube and a first end of the thirteenth resistor; the input end of the sixth switching tube is connected with the direct-current four-way valve; the output end of the sixth switching tube and the second end of the thirteenth resistor are grounded.
Optionally, the four-way valve electric control board is further provided with a plurality of mounting positions, and the four-way valve electric control board further comprises a current-limiting resistor, a first protective tube and a second protective tube, wherein the current-limiting resistor, the first protective tube and the second protective tube are mounted on the mounting positions corresponding to the four-way valve electric control board;
the current-limiting resistor is arranged between the output end of the upper bridge arm switching tube of the first bridge arm switching circuit and the controlled end of the lower bridge arm switching tube of the second bridge arm switching circuit in series;
the first protective tube is arranged between a first direct-current power supply and the input end of an upper bridge arm switching tube of the first bridge arm switching circuit in series;
the second protective tube is arranged between an alternating current power supply and the input end of the upper bridge arm switching tube of the first bridge arm switching circuit in series.
The invention also provides an air conditioner, which comprises a four-way valve and the four-way valve electric control board, wherein the output end of the four-way valve electric control board is connected with the power supply end of the four-way valve; the four-way valve is a direct-current four-way valve and/or an alternating-current four-way valve.
The invention sets a drive power switch control circuit, works when receiving a first control signal, and outputs a first switch drive signal to control the opening of an upper bridge arm switch of a first bridge arm switch circuit in an H bridge switch circuit, so that an accessed alternating current drive power is output to an alternating current four-way valve through an access end of the alternating current four-way valve; or the upper bridge arm switch of the first bridge arm switch circuit in the H-bridge switch circuit outputs an accessed direct current driving power supply when being opened, and drives the lower bridge arm switch of the second bridge arm switch circuit to be conducted when the upper bridge arm switch is conducted so as to output the accessed positive power supply to the direct current four-way valve. According to the invention, a relay is not required to be arranged, and the first switch driving signal or the second switch driving signal is output through the H-bridge switch circuit, the driving power switch control circuit and the negative polarity power switch driving circuit, so that when the upper bridge arm switch of the corresponding first bridge arm switch circuit or second bridge arm switch circuit in the H-bridge switch circuit is driven to be conducted, the lower bridge arm switch on the diagonal angle with the upper bridge arm switch is controlled to be conducted through the upper bridge arm switch, and thus, the four bridge arm switches can be controlled to work by outputting two driving signals, and the problem of direct connection of the upper pipe and the lower pipe of the same bridge arm switch is solved. The invention solves the problems that when the same PCB comprises the mutually independent AC four-way valve and DC four-way valve power supply control circuit, the number of circuit components is large, the occupied PCB space is large, and the volume of the air conditioner is not favorably reduced. Or two corresponding PCB boards need to be designed for the two four-way valve plates, so that the universality of the electric control plate is low, and the development efficiency of enterprises is reduced. In addition, the circuit structure of the four-way valve electric control board can be simplified, the design requirements on devices can be reduced, and the electric control board circuit of the electrical equipment can be simplified, so that the size of the electric control board is reduced, and the installation convenience of the electric control board in the electrical equipment is improved. The invention improves the driving efficiency of the four-way valve, can realize the self-holding of the state of the four-way valve and is beneficial to energy conservation and emission reduction.
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 diagram of a functional module structure of an embodiment of a four-way valve driving circuit in an electric control board of the four-way valve according to the present invention;
fig. 2 is a schematic circuit diagram of a four-way valve driving circuit in an electric control board of a four-way valve according to an embodiment of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | Drive power switch control circuit | RY1 | |
| 20 | Negative polarity power switch driving circuit | D1 | First diode |
| 30 | H-bridge switching circuit | D2 | |
| 40 | Second switch circuit | J1 | Current-limiting |
| 50 | First absorption circuit | F1 | First protective tube |
| 60 | Second absorption circuit | F2 | Second protective tube |
| 11 | Forward control signal amplifying unit | CN1 | AC four-way valve access end |
| 12 | Forward switch drive unit | CN2 | Direct current four-way |
| 31 | First bridge arm switching circuit | Q1～Q6 | First to |
| 32 | Second bridge arm switching circuit | R1～R13 | First to thirteenth resistors |
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.
The invention provides an electric control plate of a four-way valve.
In an air conditioner, a four-way valve is generally provided to switch between a cooling mode, a dehumidifying mode, and a heating mode. Specifically, when the unit operates in a refrigeration and dehumidification mode, a coil of the four-way valve is controlled to be powered off, and a valve core of the four-way valve is pulled to one end of the four-way valve for refrigeration and dehumidification by the aid of elastic force of a spring in the four-way valve; when the unit operates in a heating mode, the coil of the four-way valve is electrified, and the magnetic force of the coil overcomes the internal spring force of the four-way valve and then wicks the four-way valve to one heating end. The positions of the two ends of the valve core of the four-way valve are different, so that the refrigerant flow path of the system is controlled to be changed for refrigerating or heating. Of course, in some air conditioners, the four-way valve coil can be controlled to be powered on during refrigeration and dehumidification, and the four-way valve coil is controlled to be powered off during heating, and the principle is similar to that of the prior air conditioner. Therefore, in the heating or refrigerating process, the working state of the four-way valve is changed by controlling the on/off of the four-way valve, and the switching of the refrigerating/heating modes is realized.
The four-way valve is divided into an alternating current four-way valve and a direct current four-way valve, driving power supplies of the alternating current four-way valve and the direct current four-way valve are also divided into an alternating current driving power supply and a direct current driving power supply, generally, the driving control circuits and the driving power supplies of the alternating current four-way valve and the direct current driving power supplies are required to be independent, and the alternating. That is, when the same PCB board contains the power control circuit of the ac four-way valve and the dc four-way valve, the driving power and the control of the two valves need to be independent from each other; if set up any one kind of power control circuit of interchange cross valve and direct current cross valve on a PCB board, both circuits can't realize compatibly, will lead to the unable general of automatically controlled board between interchange cross valve and the direct current cross valve like this, need be directed against two kinds of cross valves and design two way drive control circuit at same PCB board, when containing mutually independent interchange cross valve and direct current cross valve power control circuit on this kind of same PCB, circuit components and parts are in large quantities, the shared PCB space is big, be unfavorable for reducing the volume of air conditioner. Or two corresponding PCB boards are designed aiming at two four-way valve boards, so that at least one electric control board is required to be matched with each four-way valve, the universality of the electric control board is low, and the development efficiency of enterprises is reduced.
Referring to fig. 1, in an embodiment of the present invention, the four-way valve electric control board includes:
the alternating current four-way valve access end CN1 is used for accessing the alternating current four-way valve;
the direct-current four-way valve access end CN2 is used for accessing the direct-current four-way valve;
a drive power switch control circuit 10 that operates upon receiving the first control signal and outputs a first switch drive signal;
a negative polarity power switch drive circuit 20 that operates upon receiving the second control signal and outputs a second switch drive signal;
the H-bridge switching circuit 30 comprises a first bridge arm switching circuit 31 and a second bridge arm switching circuit 32, and when an alternating-current four-way valve is connected to the alternating-current four-way valve connection end CN1, an upper bridge arm switch of the first bridge arm switching circuit works when receiving the first switch driving signal to drive the alternating-current four-way valve to work;
when a direct-current four-way valve is connected to the direct-current four-way valve connection end CN2, the upper bridge arm switch of the first bridge arm switch circuit works when receiving the first switch driving signal, and drives the lower bridge arm switch of the second bridge arm switch circuit to be connected when being connected, so that a positive polarity power supply is output to the direct-current four-way valve through the direct-current four-way valve connection end CN 2; and the number of the first and second groups,
the upper bridge arm switch of the second bridge arm switch circuit works when receiving the second switch driving signal, and drives the lower bridge arm switch of the first bridge arm switch circuit to be conducted when being conducted, so that a negative power supply is output to the direct-current four-way valve through the direct-current four-way valve access end CN 2.
In this embodiment, the ac four-way valve input CN1 and the dc four-way valve input CN2 are respectively used for inputting the ac four-way valve and the dc four-way valve, specifically, two ends of the ac four-way valve input CN1 are connected to two ends of the ac four-way valve coil, and two ends of the dc four-way valve input CN2 are connected to two ends of the dc four-way valve coil. The dc drive power supply includes a four-way valve coil, a power supply electrode, a dc drive power supply, and a dc drive power supply. Generally, an ac four-way valve and a dc four-way valve are alternatively provided in an air conditioner, but in other embodiments, an ac four-way valve and a dc four-way valve may be provided in the air conditioner at the same time.
In some embodiments, the four-way valve electric control board is disposed on an electric control board of an outdoor unit of an air conditioner, and the electric control board is further provided with a main control chip for controlling operation of devices such as a compressor, a fan, and the like in the outdoor unit of the air conditioner. Specifically, the main control chip may be a high-level pulse control signal and a low-level pulse control signal, and when receiving the high-level pulse control signal (a first control signal), the driving power switch control circuit 10 outputs a first switch driving signal; when receiving the pulse control signal (first control signal) at the low level, the driving power switch control circuit 10 does not operate, that is, does not output the first switch driving signal. A negative polarity power switch drive circuit 20 for outputting a second switch drive signal when receiving a high-level pulse control signal (second control signal); when receiving the pulse control signal (second control signal) at the low level, the switch does not operate, that is, the second switch driving signal is not output.
The upper arm switch of the first arm switch circuit is used for controlling the output of an alternating current driving power supply of the alternating current four-way valve and a direct current driving power supply of the direct current four-way valve, and the input compatibility of the alternating current power supply (L, N) and the direct current power supply can be realized. Under the working condition that the alternating-current four-way valve is connected to the alternating-current four-way valve connection end CN1 (at the moment, the direct-current four-way valve is not connected), when the upper bridge arm switch of the first bridge arm switch circuit is conducted, an alternating-current driving power supply is output to drive the alternating-current four-way valve to work, and the four-way valve is opened to a corresponding refrigerating and dehumidifying (or heating) mode. When the upper arm switch of the first arm switch circuit is turned off, the output of the ac driving power supply is stopped to stop the supply of the driving power supply to the ac four-way valve, thereby opening the four-way valve to a heating (or cooling or dehumidifying) mode.
Under the working condition that a direct-current four-way valve (at the moment, the alternating-current four-way valve is not connected) is connected to the direct-current four-way valve connecting end CN2, the common end of the upper bridge arm switch and the lower bridge arm switch in the first bridge arm switch circuit is connected with one end of the four-way valve connecting end, and the common end of the upper bridge arm switch and the lower bridge arm switch in the second bridge arm switch circuit is connected with the other end of the four-way valve connecting end through the first bridge arm switch circuit. The upper bridge arm switch of the first bridge arm switch circuit and the upper bridge arm switch of the second bridge arm switch circuit are connected with the driving power supply, and the lower bridge arm switch of the first bridge arm switch circuit and the lower bridge arm switch of the second bridge arm switch circuit are grounded with the driving power supply, namely, the first bridge arm switch circuit and the second bridge arm switch circuit enable the four-way valve coil to be connected with the driving power supply and the ground through the four-way valve access end, so that the accessed driving power supply is output to the four-way valve through the four-way valve access end, and the four-way valve is driven to work.
When the upper arm switch of the first arm switch circuit is turned on, the dc drive power supply is output, and when the upper arm switch of the first arm switch circuit is turned off, the output of the dc drive power supply is stopped. In this embodiment, whether the ac four-way valve is supplied with the ac driving power source can be controlled by controlling whether the upper arm switch of the first arm switch circuit operates, so that the ac four-way valve is driven, and whether the dc driving power source for driving the dc four-way valve to operate is output can be controlled by controlling whether the upper arm switch of the first arm switch circuit operates, so that the dc four-way valve is driven.
It should be noted that, the four-way valve coil includes a first end and a second end, and the positive polarity driving power of the four-way valve means: the current of the drive power supply flows in from the first end of the four-way valve coil, flows through the four-way valve coil, and then flows out from the second end of the four-way valve coil. The negative polarity driving power supply of the four-way valve refers to: the current of the drive power supply flows in from the second end of the four-way valve coil, flows through the four-way valve coil, and then flows out from the first end of the four-way valve coil.
When the H-bridge switch circuit 30 receives the first switch driving signal (at this time, the negative power switch driving circuit 20 does not work), the upper bridge arm switch of the first bridge arm switch circuit is turned on, and drives the lower bridge arm switch of the second bridge arm switch circuit to be turned on after being turned on, at this time, the upper bridge arm switch of the first bridge arm switch circuit will be connected with a driving power supply and flow into the first end a of the four-way valve coil through the common end of the first bridge arm switch circuit, and the second end B of the four-way valve coil is grounded through the lower bridge arm switch of the second bridge arm switch circuit, so that the connected positive driving power supply is output to the direct-current four-way valve. When the H-bridge switch circuit 30 receives the second switch driving signal (at this time, the driving power switch control circuit 10 does not work), the upper bridge arm switch of the second bridge arm switch circuit is turned on, and drives the lower bridge arm switch of the second bridge arm circuit to be turned on after being turned on, at this time, the upper bridge arm switch of the second bridge arm switch circuit enables the connected driving power to flow into the second end B of the four-way valve coil through the common end of the first bridge arm switch circuit, and the first end a of the four-way valve coil is grounded through the lower bridge arm switch of the first bridge arm switch circuit, so that the connected negative polarity driving power is output to the direct-current four-way valve. In this embodiment, the upper arm switch of the first arm switch circuit is controlled to be turned on/off by driving the power switch control circuit 10, and the lower arm switch of the second arm switch circuit at the opposite angle is controlled to be turned on/off by turning on/off the upper arm switch of the first arm switch circuit. In this embodiment, the upper arm switch of the second arm switch circuit is controlled to be turned on/off by the negative polarity power switch driving circuit 20, and then the lower arm switch of the diagonal second arm switch circuit is controlled to be turned on/off by the on/off of the upper arm switch of the second arm switch circuit. By the arrangement, when the upper bridge arm switch of the corresponding first bridge arm switch circuit or second bridge arm switch circuit is driven to be switched on, the lower bridge arm switch on the diagonal angle with the upper bridge arm switch is controlled to be switched on by the upper bridge arm switch through outputting any one drive signal of the first switch drive signal or the second switch drive signal, so that the four bridge arm switches can be controlled to work by outputting two drive signals.
According to the characteristic that a left end and a right end of a valve core of the four-way valve are arranged, the position of the valve core of the four-way valve is controlled by controlling the direction of a coil of the four-way valve, which is connected with a power electrode, of the four-way valve, when a first end A of the coil of the four-way valve, which is connected with the power electrode, is positive (current of a direct current driving power source flows into the coil from the end), and a second end B of the coil of the four-way valve, which is connected with the power electrode, is negative, the valve core is switched to the left end (or the right end), when the second end B of the coil of the four-way valve, which is connected with the power electrode, is positive (current of the direct current driving power. According to the arrangement, the air conditioner enters a refrigeration, dehumidification or heating mode after being started, or the refrigeration, dehumidification mode and the heating mode are mutually switched, the conduction of the lower bridge arm switch on the diagonal line is controlled by controlling the conduction of the upper bridge arm switch of the first bridge arm switch circuit and the upper bridge arm switch of the second bridge arm switch circuit in the H-bridge circuit to form the direction of the current of the direct current driving power supply for driving the four-way valve to work to flow through the four-way valve, so that the four-way valve is opened to the corresponding refrigeration, dehumidification or heating mode, then all the bridge arm switches in the H-bridge circuit can be turned off to turn off the direct current driving power supply for the four-way valve, the self-holding of the state of the four-way valve is realized, and.
The driving power supply switch control circuit 10 is arranged, works when receiving a first control signal, and outputs a first switch driving signal to control the opening of an upper bridge arm switch of a first bridge arm switch circuit in an H bridge switch circuit 30 so as to output an accessed alternating current driving power supply to an alternating current four-way valve through an alternating current four-way valve access end CN 1; or the upper bridge arm switch of the first bridge arm switch circuit in the H-bridge switch circuit 30 outputs the accessed direct current driving power supply when being opened, and drives the lower bridge arm switch of the second bridge arm switch circuit to be conducted when the upper bridge arm switch is conducted so as to output the accessed positive power supply to the direct current four-way valve. According to the invention, a relay is not required to be arranged, and the H-bridge switch circuit 30, the driving power switch control circuit 10 and the negative polarity power switch driving circuit 20 output a first switch driving signal or a second switch driving signal, so that when an upper bridge arm switch of a corresponding first bridge arm switch circuit or second bridge arm switch circuit in the H-bridge switch circuit 30 is driven to be conducted, a lower bridge arm switch on the diagonal direction with the upper bridge arm switch is controlled to be conducted through the upper bridge arm switch, and thus, the four bridge arm switches can be controlled to work by outputting two driving signals, and the problem of direct connection of an upper pipe and a lower pipe of the same bridge arm switch is solved. The invention solves the problems that when the same PCB comprises the mutually independent AC four-way valve and DC four-way valve power supply control circuit, the number of circuit components is large, the occupied PCB space is large, and the volume of the air conditioner is not favorably reduced. Or two corresponding PCB boards need to be designed for the two four-way valve plates, so that the universality of the electric control plate is low, and the development efficiency of enterprises is reduced. In addition, the circuit structure of the four-way valve electric control board can be simplified, the design requirements on devices can be reduced, and the electric control board circuit of the electrical equipment can be simplified, so that the size of the electric control board is reduced, and the installation convenience of the electric control board in the electrical equipment is improved. The invention improves the driving efficiency of the four-way valve, can realize the self-holding of the state of the four-way valve and is beneficial to energy conservation and emission reduction.
It can be understood that the four-way valve electric control board of the invention has simple circuit structure and easy realization, and can be widely applied to the driving of electrical elements which need to output driving circuits with positive and negative polarities, namely the invention includes but is not limited to the driving of the four-way valve.
Referring to fig. 1 and 2, in an embodiment, the driving power switch control circuit 10 includes a forward control signal amplification unit 11 and a forward switch driving unit 12, a controlled end of the forward control signal amplification unit is configured to access the first control signal, an output end of the forward control signal amplification unit is connected to the controlled end of the forward switch driving unit 12, an input end of the forward switch driving unit 12 is connected to a switch driving signal, and an output end of the forward switch driving unit 12 is connected to an upper arm switch of the first arm switch circuit and a lower arm switch of the second arm switch circuit, respectively.
It should be noted that the power supply voltage of the control chip on the electronic control board is usually 3.3V or 5V, and the voltage of the output control signal is also usually 3.3V or 5V, while the upper arm switch and the lower arm switch in the H-bridge switch circuit 30 are usually set as relays or power tubes, and usually require a drive voltage of 9V, 12V or higher to drive, for this reason, the second control signal output by the control chip is amplified and output by setting the negative positive control signal amplification unit. And when receiving the amplified second control signal, the negative polarity switch driving unit outputs a high-level positive polarity switch driving signal to the upper bridge arm switch of the second bridge arm switch circuit and the lower bridge arm switch of the first bridge arm switch circuit so as to drive the upper bridge arm switch of the second bridge arm switch circuit and the lower bridge arm switch of the first bridge arm switch circuit to be conducted. And when the negative polarity switch driving unit does not receive the amplified second control signal, outputting a low-level positive polarity switch driving signal to the upper bridge arm switch of the second bridge arm switch circuit and the lower bridge arm switch of the first bridge arm switch circuit so as to drive the upper bridge arm switch of the second bridge arm switch circuit and the lower bridge arm switch of the first bridge arm switch circuit to be switched off.
Referring to fig. 1 and 2, in an embodiment, the forward control signal amplifying unit 11 includes a first switch Q1, a first resistor R1 and a second resistor R2, a first end of the first resistor R1 is a controlled end of the forward control signal amplifying unit 11, and a second end of the first resistor R1 is interconnected with the controlled end of the first switch Q1 and a first end of the second resistor R2; the input end of the first switch tube Q1 and the second end of the second resistor R2 are both grounded, and the output end of the first switch tube Q1 is the output end of the forward control signal amplifying unit;
and/or, forward switch drive unit 12 includes second switch tube, third resistance, fourth resistance and fifth resistance, the first end of third resistance does the controlled end of forward switch drive unit 12, and with the first end of fourth resistance is connected, the second end of third resistance with the controlled end of second switch tube with the first end of fifth resistance is connected, the input of second switch tube the second end of fourth resistance reaches the second end of fifth resistance and first direct current power VCC1 interconnect.
In this embodiment, the first switching tube Q1 may be implemented by using an NPN-type triode, the second switching tube may be implemented by using power tubes such as an MOS tube and an IGBT, the first switching tube Q1 is controlled by a control chip on an electric control board, the NPN-type triode is turned on when receiving a second high-level control signal to control the second switching tube to be turned on, and when the second switching tube is turned on, the NPN-type triode provides driving electric energy for the lower arm switch of the second arm switching circuit and the upper arm switch of the first arm switching circuit, so that the lower arm switch of the second arm switching circuit and the upper arm switch of the first arm switching circuit form a current loop with the four-way valve to drive the four-way valve to operate. The first switch tube Q1 is turned off when receiving the second control signal of low level, and controls the second switch tube to be turned off.
Referring to fig. 1 and 2, in an embodiment, the negative power switch driving circuit 20 includes a third switching tube Q3, a sixth resistor R6 and a seventh resistor R7, a first end of the sixth resistor R6 is a controlled end of the negative power switch driving circuit 20, and a second end of the sixth resistor R6 is interconnected with the controlled end of the third switching tube Q3 and a first end of the seventh resistor R7; the input end of the third switching tube Q3 and the second end of the fourth resistor are both grounded, and the output end of the third switching tube Q3 is the output end of the negative polarity power switch driving circuit 20.
In this embodiment, the third switching tube Q3 may be implemented by a transistor, an IGBT, an MOS transistor, or another switching tube, and in this embodiment, the third switching tube Q3 may be implemented by an NPN transistor, where the NPN transistor is turned on when receiving the first high-level control signal to output the second switch driving signal to the upper arm switching tube in the second arm switching circuit 32 in the H-bridge switching circuit 30, so as to drive the upper arm switching tube in the second arm switching circuit 32 to be turned on, and output the dc power, and is turned off when receiving the first low-level control signal to stop outputting the first switch driving signal to the upper arm switching tube in the second arm switching circuit 32. The sixth resistor R6 and the seventh resistor R7 form a voltage division circuit, and are used for dividing the voltage of the first control signal and outputting the divided voltage to the NPN triode.
Referring to fig. 1 and 2, in an embodiment, the negative polarity power switch driving circuit 20 further includes a first pull-up resistor R21, a first end of the first pull-up resistor R11 is connected to a first direct current power VCC1, and a second end of the first pull-up resistor R11 is connected to the controlled end of the upper bridge arm switch of the second bridge arm switch circuit 32.
In this embodiment, it can be understood that the upper arm switch of the second arm switch circuit is a switch tube, for example, a P-MOS tube, which is turned on at a low level, so that when the positive polarity power switch driving circuit does not operate, that is, when the positive polarity driving signal is not output, the controlled terminal of the upper arm switch keeps a high potential voltage different from the high potential voltage held by the controlled terminal of the upper arm switch through the first pull-up resistor R21, so that the response speed of the upper arm switch to the positive polarity driving signal can be increased, and meanwhile, when the positive polarity power switch driving circuit does not output the positive polarity driving signal, an interference signal on a loop can be prevented from triggering the upper arm switch to be turned on erroneously. In other embodiments, the upper arm switch of the second arm switch circuit is a switch tube that can also be turned on at a low level, and at this time, the first pull-up resistor R21 is replaced by a pull-down resistor correspondingly.
Referring to fig. 1 and 2, in an embodiment, the upper arm switch in the first arm switch circuit 31 includes a first relay RY1, a first end of a coil of the first relay RY1 is connected to the output end of the driving power switch control circuit 10, a second end of a coil of the first relay RY1 is grounded, a movable contact of the first relay RY1 is connected to the ac four-way valve input end CN1 and the dc four-way valve input end CN2, and a stationary contact of the first relay RY1 is connected to a second dc power VCC2 and an ac power supply (L, N);
the lower bridge arm switch in the first bridge arm switch circuit 31 comprises a fourth switch tube Q4, an eighth resistor R8 and a ninth resistor R9, a first end of the eighth resistor R8 is connected with the output end of the negative polarity power switch driving circuit 20, and a second end of the eighth resistor R8 is interconnected with a controlled end of the fourth switch tube Q4 and a first end of the ninth resistor R9; the input end of the fourth switching tube Q4 is connected with a direct-current four-way valve; the output end of the fourth switching tube Q4 and the second end of the ninth resistor R9 are grounded.
In this embodiment, the upper arm switch in the first arm switch circuit 31 is implemented by using a first relay RY1, the power supply of the coil of the relay is controlled by the driving power switch control circuit 10, when the MOS transistor in the driving power switch control circuit 10 is turned on, one end of the coil of the relay is grounded, and another end of the coil of the relay is connected to a first dc power VCC1 to be electrically conducted, so as to provide a driving power for the four-way valve to drive the four-way valve to operate. In one embodiment, the first dc power source VCC1 and the dc driving power source may be implemented by the same power source, for example, a 12V power source may be used to drive the relay and the dc four-way valve.
The fourth switching tube Q4 can be implemented by selectively using power tubes such as MOS tubes and IGBTs, and in this embodiment, the fourth switching tube Q4 can be an N-MOS tube, and is turned on when receiving a high-level driving signal output by the upper arm switch of the second arm switch circuit 32 based on the control of the upper arm switch of the second arm switch circuit 32, so as to provide a ground terminal for the four-way valve, at this time, the fourth switching tube Q4 forms a current loop with the upper arm switch of the second upper arm circuit and the four-way valve, so as to drive the four-way valve to operate, and the fourth switching tube Q4 keeps a cut-off state when the upper arm switch of the second upper arm circuit is cut off, so as to avoid direct connection with the upper arm switch and the lower arm switch in the first arm switch circuit.
Referring to fig. 1 and 2, in an embodiment, the four-way valve electric control board further includes a first absorption circuit 40, and the first absorption circuit 40 is connected in parallel to the first relay RY 1.
In this embodiment, the first absorption circuit 40 may be implemented by using a diode D11 and a capacitor C11, where the diode is a freewheeling diode, the freewheeling diode is connected in parallel to two ends of the coil of the first relay RY1, and when a current flows through the coil, an induced electromotive force is generated at two ends of the coil. When the current disappears, the induced electromotive force will generate negative voltage to the elements in the circuit. The freewheeling diode is connected in parallel with two ends of the coil, when the current flowing through the coil disappears, the induced electromotive force generated by the coil is consumed by the work of the loop formed by the diode and the coil, thereby avoiding damaging the front-stage circuit. In some embodiments, the first absorption circuit 40 can also be implemented by using an RC absorption circuit, or an RCD absorption circuit, that is, a resistor, an inductor and a capacitor form an absorption circuit, and the first absorption circuit 40 is connected to two ends of a coil of the dc four-way valve through two ends of an input end of the four-way valve, and is used for absorbing and consuming self-induced electromotive force generated by an inductive load, such as an ac four-way valve, when the circuit is disconnected, so as to prevent insulation breakdown of the load due to overvoltage.
Referring to fig. 1 and 2, in an embodiment, the upper leg switch in the second leg switch circuit 32 includes a fifth switch transistor Q5, a tenth resistor R10 and an eleventh resistor R11, a first end of the tenth resistor R10 is connected to the output end of the driving power switch control circuit 10, and a second end of the tenth resistor R10 is interconnected to the controlled end of the fifth switch transistor Q5 and a first end of the eleventh resistor R11; an input end of the fifth switching tube Q5 is interconnected with a second end of the eleventh resistor R11 and a second direct current power supply VCC 2; the output end of the fifth switching tube Q5 is connected with a direct-current four-way valve;
and/or the lower bridge arm switch in the first bridge arm switch circuit 31 includes a sixth switch tube Q6, a twelfth resistor R12 and a thirteenth resistor R13, a first end of the twelfth resistor R12 is connected to the output end of the upper bridge arm switch of the first bridge arm switch circuit 31, and a second end of the twelfth resistor R12 is interconnected with the controlled end of the sixth switch tube Q6 and the first end of the thirteenth resistor R13; the input end of the sixth switching tube Q6 is connected with a direct-current four-way valve; an output terminal of the sixth switching tube Q6 and a second terminal of the thirteenth resistor R13 are grounded.
In this embodiment, the fifth switching tube Q5 may be implemented by a power tube such as an MOS tube or an IGBT, and in this embodiment, the fifth switching tube Q5 may be a P-MOS tube, and the P-MOS tube is turned off when receiving a high-level positive polarity switch driving signal and turned on when receiving a low-level positive polarity switch driving signal, so as to provide a driving power supply for the four-way valve, and when turned on, drive the lower bridge arm switch of the first bridge arm switching circuit to be turned on. The ninth resistor R9 is a current limiting resistor J1 to prevent the MOS transistor from being damaged by an excessive current output to the gate of the MOS transistor, and the tenth resistor R10 is a bias resistor to provide a bias voltage for the MOS transistor. The sixth switching tube Q6 can be implemented by a power tube such as an MOS tube or an IGBT, and is optionally an N-MOS tube in this embodiment, the sixth switching tube Q6 is turned on when the upper arm switch of the first upper arm circuit is turned on and outputs a high-level driving signal based on the control of the upper arm switch of the first upper arm circuit, so as to provide a ground terminal for the four-way valve, and at this time, the sixth switching tube Q6 forms a current loop with the upper arm switch of the first upper arm circuit and the four-way valve, so as to drive the four-way valve to operate.
Referring to fig. 1 and 2, in an embodiment, the four-way valve electronic control board further includes a plurality of mounting locations, and further includes a current-limiting resistor J1, a first fuse tube F1, and a second fuse tube F2, where the current-limiting resistor J1, the first fuse tube F1, and the second fuse tube F2 are mounted on the corresponding mounting locations of the four-way valve electronic control board;
the current-limiting resistor J1 is serially connected between the output end of the upper arm switch tube of the first arm switch circuit 31 and the controlled end of the lower arm switch tube of the second arm switch circuit 32;
the first fuse F1 is serially connected between a first direct current power source VCC1 and the input end of the upper arm switch tube of the first arm switch circuit 31;
the second fuse F2 is serially connected between an ac power supply (L, N) and the input end of the upper arm switch tube of the first arm switch circuit 31.
It can be understood that, in the air conditioner, the ac four-way valve and the dc four-way valve are alternatively arranged, and in practical application, the electric control board is reserved with installation positions of the first protective tube F1, the second protective tube F2 and the current-limiting resistor J1, so that a user can access the current-limiting resistor J1, the first protective tube F1 and the second protective tube F2 according to requirements, thereby selecting a driving circuit for driving the ac four-way valve to be communicated, and communicating the driving circuit for driving the dc four-way valve. When an ac four-way valve is connected to the ac four-way valve connection end CN1, the first fuse tube F1 is connected in series between the ac driving power supply and the ac four-way valve connection end CN1, and at this time, the installation positions of the second fuse tube F2 and the current-limiting resistor J1 may be set in an open circuit or a high resistance, so that the ac driving power supply connected to the upper arm switch of the first arm switch circuit 31 does not flow through the lower arm switch and the dc four-way valve connection end CN 2. When a dc four-way valve is connected to the dc four-way valve connection end CN2, the second fuse F2 is connected in series between the dc power supply and the upper arm switch of the first arm switch circuit 31, and the current-limiting resistor J1 is connected in series between the upper arm switch of the first arm switch circuit 31 and the dc four-way valve connection end CN2, so as to connect the upper arm switch of the first arm switch circuit 31 and the dc four-way valve connection end CN2, at this time, the installation position of the first fuse F1 may be set to an open circuit or a high resistance, so that the dc driving power supply connected to the upper arm switch of the first arm switch circuit 31 does not flow into the ac four-way valve connection end CN 1.
The invention relates to an air conditioner, which comprises a four-way valve and a four-way valve electric control board, wherein two output ends of the four-way valve electric control board are correspondingly connected with two power supply ends of a direct-current four-way valve one by one; the four-way valve is a direct-current four-way valve and/or an alternating-current four-way valve. The detailed structure of the four-way valve electric control board can refer to the above embodiment, and is not described herein; it can be understood that, because the four-way valve electric control board is used in the air conditioner of the present invention, the embodiments of the air conditioner of the present invention include all technical solutions of all embodiments of the four-way valve electric control board, and the achieved technical effects are also completely the same, and are not described herein again.
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 (10)
1. The utility model provides an automatically controlled board of cross valve, includes automatically controlled board, and set up in automatically controlled board of cross valve on the automatically controlled board, its characterized in that, the automatically controlled board of cross valve includes:
the AC four-way valve access end is used for accessing the AC four-way valve;
the direct-current four-way valve is connected to the input end and is used for connecting the direct-current four-way valve;
the driving power switch control circuit works when receiving the first control signal and outputs a first switch driving signal;
the negative power switch driving circuit works when receiving the second control signal and outputs a second switch driving signal;
the H-bridge switching circuit comprises a first bridge arm switching circuit and a second bridge arm switching circuit, and when an alternating-current four-way valve is connected to the connecting end of the alternating-current four-way valve, an upper bridge arm switch of the first bridge arm switching circuit works when receiving the first switch driving signal so as to drive the alternating-current four-way valve to work;
when the direct-current four-way valve is connected to the connecting end of the direct-current four-way valve, the upper bridge arm switch of the first bridge arm switch circuit works when receiving the first switch driving signal, and drives the lower bridge arm switch of the second bridge arm switch circuit to be connected when being connected, so that a forward power supply is output to the direct-current four-way valve through the connecting end of the direct-current four-way valve; and the number of the first and second groups,
and the upper bridge arm switch of the second bridge arm switch circuit works when receiving the second switch driving signal and drives the lower bridge arm switch of the first bridge arm switch circuit to be conducted when being conducted so as to output a negative power supply to the direct-current four-way valve through the direct-current four-way valve access end.
2. The four-way valve electric control board according to claim 1, wherein the driving power switch control circuit comprises a forward control signal amplification unit and a forward switch driving unit, a controlled end of the forward control signal amplification unit is used for accessing the first control signal, an output end of the forward control signal amplification unit is connected with a controlled end of the forward switch driving unit, an input end of the forward switch driving unit is accessed with a switch driving signal, and an output end of the forward switch driving unit is respectively connected with an upper bridge arm switch of the first bridge arm switch circuit and a lower bridge arm switch of the second bridge arm switch circuit.
3. The four-way valve electric control board according to claim 2, wherein the forward control signal amplifying unit comprises a first switch tube, a first resistor and a second resistor, a first end of the first resistor is a controlled end of the forward control signal amplifying unit, and a second end of the first resistor is interconnected with the controlled end of the first switch tube and a first end of the second resistor; the input end of the first switch tube and the second end of the second resistor are both grounded, and the output end of the first switch tube is the output end of the forward control signal amplification unit;
and/or, the forward switch drive unit includes second switch tube, third resistance, fourth resistance and fifth resistance, the first end of third resistance is the controlled end of forward switch drive unit, and with the first end of fourth resistance is connected, the second end of third resistance with the controlled end of second switch tube with the first end of fifth resistance is connected, the input of second switch tube, the second end of fourth resistance and the second end of fifth resistance and first direct current power supply interconnect.
4. The four-way valve electric control board according to claim 1, wherein the negative polarity power switch driving circuit comprises a third switching tube, a sixth resistor and a seventh resistor, a first end of the sixth resistor is a controlled end of the negative polarity power switch driving circuit, and a second end of the sixth resistor is interconnected with the controlled end of the third switching tube and a first end of the seventh resistor; the input end of the third switching tube and the second end of the seventh resistor are both grounded, and the output end of the third switching tube is the output end of the negative power switch driving circuit.
5. The four-way valve electric control board according to claim 4, wherein the negative polarity power switch driving circuit further comprises a first pull-up resistor, a first end of the first pull-up resistor is connected to a first DC power source, and a second end of the first pull-up resistor is connected to the controlled end of the upper bridge arm switch of the second bridge arm switch circuit.
6. The four-way valve electric control board according to claim 1, wherein the upper bridge arm switch in the first bridge arm switch circuit comprises a first relay, a first end of a coil of the first relay is connected with the output end of the driving power switch control circuit, a second end of the coil of the first relay is grounded, a moving contact of the first relay is connected with the ac four-way valve input end and the dc four-way valve input end, and a stationary contact of the first relay is connected with a second dc power supply and the ac power supply;
a lower bridge arm switch in the first bridge arm switch circuit comprises a fourth switch tube, an eighth resistor and a ninth resistor, wherein a first end of the eighth resistor is connected with an output end of the negative polarity power switch driving circuit, and a second end of the eighth resistor is interconnected with a controlled end of the fourth switch tube and a first end of the ninth resistor; the input end of the fourth switching tube is connected with the direct-current four-way valve; and the output end of the fourth switching tube and the second end of the ninth resistor are grounded.
7. The four-way valve electric control board according to claim 6, wherein the four-way valve driving circuit further comprises a first absorption circuit, and the first absorption circuit is arranged in parallel with the first relay.
8. The four-way valve electric control board according to claim 1, wherein the upper bridge arm switch in the second bridge arm switch circuit comprises a fifth switch tube, a tenth resistor and an eleventh resistor, a first end of the tenth resistor is connected with the output end of the driving power switch control circuit, and a second end of the tenth resistor is interconnected with the controlled end of the fifth switch tube and a first end of the eleventh resistor; the input end of the fifth switching tube is interconnected with the second end of the eleventh resistor and a second direct-current power supply; the output end of the fifth switching tube is connected with the direct-current four-way valve;
and/or a lower bridge arm switch in the first bridge arm switch circuit comprises a sixth switch tube, a twelfth resistor and a thirteenth resistor, wherein a first end of the twelfth resistor is connected with an output end of an upper bridge arm switch of the first bridge arm switch circuit, and a second end of the twelfth resistor is connected with a controlled end of the sixth switch tube and a first end of the thirteenth resistor; the input end of the sixth switching tube is connected with the direct-current four-way valve; the output end of the sixth switching tube and the second end of the thirteenth resistor are grounded.
9. The four-way valve electric control board according to claim 1, wherein the four-way valve electric control board is further provided with a plurality of mounting positions, and the four-way valve electric control board further comprises a current limiting resistor, a first protective tube and a second protective tube, wherein the current limiting resistor, the first protective tube and the second protective tube are mounted on the corresponding mounting positions of the four-way valve electric control board;
the current-limiting resistor is arranged between the output end of the upper bridge arm switching tube of the first bridge arm switching circuit and the controlled end of the lower bridge arm switching tube of the second bridge arm switching circuit in series;
the first protective tube is arranged between a first direct-current power supply and the input end of an upper bridge arm switching tube of the first bridge arm switching circuit in series;
the second protective tube is arranged between an alternating current power supply and the input end of the upper bridge arm switching tube of the first bridge arm switching circuit in series.
10. An air conditioner, characterized in that, comprising a four-way valve and a four-way valve electric control board according to any one of claims 1 to 9, wherein the output end of the four-way valve electric control board is connected with the power supply end of the four-way valve; the four-way valve is a direct-current four-way valve and/or an alternating-current four-way valve.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910622850.8A CN110410990B (en) | 2019-07-09 | 2019-07-09 | Automatically controlled board of cross valve and air conditioner |
| PCT/CN2020/100623 WO2021004450A1 (en) | 2019-07-09 | 2020-07-07 | Four-way valve electrical control board and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910622850.8A CN110410990B (en) | 2019-07-09 | 2019-07-09 | Automatically controlled board of cross valve and air conditioner |
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| CN110410990A CN110410990A (en) | 2019-11-05 |
| CN110410990B true CN110410990B (en) | 2021-03-19 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910622850.8A Active CN110410990B (en) | 2019-07-09 | 2019-07-09 | Automatically controlled board of cross valve and air conditioner |
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| WO (1) | WO2021004450A1 (en) |
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| CN110410990B (en) * | 2019-07-09 | 2021-03-19 | 广东美的制冷设备有限公司 | Automatically controlled board of cross valve and air conditioner |
| CN113608455A (en) * | 2021-07-29 | 2021-11-05 | 梁文华 | Test tube cleaning instrument control circuit that disinfects |
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| CN102506485A (en) * | 2011-09-27 | 2012-06-20 | 广东美的电器股份有限公司 | Self-holding four-way valve control circuit of air conditioner and control method thereof |
| CN103944365A (en) * | 2014-04-14 | 2014-07-23 | 山东大学 | Secondary ripple eliminating circuit of single-phase PWM rectifier |
| CN108458443A (en) * | 2018-03-20 | 2018-08-28 | 广东美的制冷设备有限公司 | Air conditioner malfunction detection method, detection device, air conditioner and storage medium |
| CN108521241A (en) * | 2018-04-28 | 2018-09-11 | 常州电子研究所有限公司 | Switching mechanism driving circuit and its driving method |
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| DE102011111839A1 (en) * | 2011-08-27 | 2013-02-28 | Minebea Co., Ltd. | Full bridge rectifier circuit for use with power supply, has semiconductor switches with integrated diodes, whose two gate terminals are arranged on bridge arm sides of full bridge circuit and are connected with input terminal |
| CN204349439U (en) * | 2014-11-21 | 2015-05-20 | 南京鼎瑞智能电力科技有限公司 | The anti-straight-through drive circuit of magnetic latching relay of a kind of Intelligent capacitor |
| JP6354623B2 (en) * | 2015-03-05 | 2018-07-11 | 住友電気工業株式会社 | Conversion device |
| CN106208641B (en) * | 2016-09-18 | 2020-02-21 | 北京机械设备研究所 | Alternating current-direct current multiplexing circuit |
| CN110410990B (en) * | 2019-07-09 | 2021-03-19 | 广东美的制冷设备有限公司 | Automatically controlled board of cross valve and air conditioner |
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2019
- 2019-07-09 CN CN201910622850.8A patent/CN110410990B/en active Active
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2020
- 2020-07-07 WO PCT/CN2020/100623 patent/WO2021004450A1/en active Application Filing
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|---|---|---|---|---|
| CN102222948A (en) * | 2011-06-09 | 2011-10-19 | 卢保聪 | Cascaded online uninterrupted power supply |
| CN102506485A (en) * | 2011-09-27 | 2012-06-20 | 广东美的电器股份有限公司 | Self-holding four-way valve control circuit of air conditioner and control method thereof |
| CN103944365A (en) * | 2014-04-14 | 2014-07-23 | 山东大学 | Secondary ripple eliminating circuit of single-phase PWM rectifier |
| CN108458443A (en) * | 2018-03-20 | 2018-08-28 | 广东美的制冷设备有限公司 | Air conditioner malfunction detection method, detection device, air conditioner and storage medium |
| CN108521241A (en) * | 2018-04-28 | 2018-09-11 | 常州电子研究所有限公司 | Switching mechanism driving circuit and its driving method |
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| CN110410990A (en) | 2019-11-05 |
| WO2021004450A1 (en) | 2021-01-14 |
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