CN220957044U - Four-way valve driving circuit, circuit board and air conditioner - Google Patents

Abstract

The application provides a four-way valve driving circuit, a circuit board and an air conditioner, which comprise a positive and negative polarity switching module, a first driving amplifying unit, a second driving amplifying unit and a valve access end, wherein the positive and negative polarity switching module comprises a first bridge arm provided with a first upper bridge pipe and a first lower bridge pipe and a second bridge arm provided with a second upper bridge pipe and a second lower bridge pipe; the first driving amplification unit is connected to the first lower bridge pipe, and the second driving amplification unit is connected to the second lower bridge pipe or connected to the first upper bridge pipe and the second lower bridge pipe; the valve access end is arranged on the first bridge arm and the second bridge arm. The application can realize the switching of positive and negative polarity functions through the switching states of the first upper bridge pipe, the first lower bridge pipe, the second upper bridge pipe and the second lower bridge pipe, thereby switching the refrigerant flow direction in the direct-current four-way valve, being capable of replacing the existing double-pole double-throw relay scheme, not only being capable of reducing the production cost, but also being capable of reducing the occupied area of a circuit board, and being beneficial to popularization and application and design of a miniaturized scheme.

Description

Four-way valve driving circuit, circuit board and air conditioner

Technical Field

The application relates to the technical field of air conditioners, in particular to a four-way valve driving circuit, a circuit board and an air conditioner.

Background

In the related art, for the current direct-current four-way valve driving circuit, a double-pole double-throw relay is usually selected to switch the coil input voltage of the direct-current four-way valve, but the double-pole double-throw relay is not beneficial to popularization and application due to high cost; in addition, because the volume of the double-pole double-throw relay is large, the occupied circuit board space is large, and the design of a miniaturized scheme is not facilitated.

Disclosure of utility model

The present application aims to solve at least one of the technical problems existing in the prior art. Therefore, the application provides a four-way valve driving circuit, a circuit board and an air conditioner, which aim to reduce production cost and realize miniaturized layout.

In a first aspect, an embodiment of the present application provides a four-way valve driving circuit, including:

The positive and negative polarity switching module comprises a first bridge arm and a second bridge arm, wherein the first bridge arm is provided with a first upper bridge pipe and a first lower bridge pipe, and the second bridge arm is provided with a second upper bridge pipe and a second lower bridge pipe;

The first driving amplifying unit is connected to the first lower bridge pipe and is used for outputting a first switch driving signal;

A second driving amplifying unit connected to the second lower bridge pipe or connected to the first upper bridge pipe and the second lower bridge pipe for outputting a second switch driving signal;

The valve access end is arranged on the first bridge arm and the second bridge arm;

The first lower bridge tube is in response conduction according to the first switch driving signal and drives the second upper bridge tube to be conducted so that a first power supply current is output to the direct-current four-way valve through the valve access end;

The second lower bridge tube is in response conduction according to the second switch driving signal and drives the first upper bridge tube to be in conduction, or the first upper bridge tube and the second lower bridge tube are in response conduction according to the second switch driving signal, so that a second power supply current is output to the direct-current four-way valve through the valve access end; wherein the first supply current and the second supply current flowing through the valve access terminal are in opposite directions.

According to some embodiments of the application, the positive-negative polarity switching module further comprises a first power supply terminal and a ground terminal, and the first bridge arm and the second bridge arm are connected between the first power supply terminal and the ground terminal.

According to some embodiments of the application, the controlled end of the first lower bridge pipe is connected to the output end of the first driving amplifying unit, the output end of the first lower bridge pipe is connected to the ground, the input end of the first lower bridge pipe is connected to the controlled end of the second upper bridge pipe and the first power supply end, and the input end of the second upper bridge pipe is connected to the first power supply end.

According to some embodiments of the application, in a case where the second lower bridge pipe is turned on in response to the second switch driving signal and drives the first upper bridge pipe to be turned on, a controlled end of the second lower bridge pipe is connected to an output end of the second driving amplifying unit, an output end of the second lower bridge pipe is connected to the ground, an input end of the second lower bridge pipe is connected to the controlled end of the first upper bridge pipe and the first power supply end, and an input end of the first upper bridge pipe is connected to the first power supply end.

According to some embodiments of the application, in a case where the first upper bridge pipe and the second lower bridge pipe are turned on in response to the second switch driving signal, the first upper bridge pipe is a first relay including a first coil and a first interlock switch, the second lower bridge pipe is a second relay including a second coil and a second interlock switch, both of the first coil and the second coil are connected to the first power supply terminal and the second driving amplification unit, the first interlock switch is disposed between the first power supply terminal and the first lower bridge pipe, and the second interlock switch is disposed between the second upper bridge pipe and the ground terminal.

According to some embodiments of the application, the first driving amplifying unit includes a first switching tube and a second switching tube, a controlled end of the first switching tube is used for receiving a first control signal, an input end of the first switching tube is connected to a second power supply end and a controlled end of the second switching tube, an input end of the second switching tube is connected to the first power supply end and the first lower bridge tube, and output ends of the first switching tube and the second switching tube are both connected to the ground end.

According to some embodiments of the application, the second driving amplifying unit includes a third switching tube and a fourth switching tube, the controlled end of the third switching tube is used for receiving a second control signal, the input end of the third switching tube is connected to the second power supply end and the controlled end of the fourth switching tube, the input end of the fourth switching tube is connected to the first power supply end and the second lower bridge tube, and the output ends of the third switching tube and the fourth switching tube are both connected to the ground end.

According to some embodiments of the application, the second driving amplifying unit includes a fifth switching tube and a sixth switching tube, the controlled ends of the fifth switching tube and the sixth switching tube are each configured to receive a second control signal, the output end of the fifth switching tube is connected to the first power supply end, the output end of the sixth switching tube is connected to the ground end, and the input end of the fifth switching tube and the input end of the sixth switching tube are each connected to the first coil and the second coil.

According to some embodiments of the application, the valve access end comprises a first access end disposed between the first upper bridge tube and the first lower bridge tube and a second access end disposed between the second upper bridge tube and the second lower bridge tube.

According to some embodiments of the application, the first supply current flows through the first supply terminal, the second upper bridge pipe, the second access terminal, the first lower bridge pipe, and the ground terminal in this order; the second power supply current sequentially flows through the first power supply end, the first upper bridge pipe, the first access end, the second lower bridge pipe and the grounding end.

In a second aspect, an embodiment of the present application provides a circuit board, including the four-way valve driving circuit of the first aspect.

In a third aspect, an embodiment of the present application provides an air conditioner, including a dc four-way valve and a circuit board according to the second aspect, where a coil in the dc four-way valve is connected to the valve access end in the circuit board.

According to the technical scheme provided by the embodiment of the application, the technical effects include but are not limited to the following: the embodiment of the application can realize the switching of positive and negative polarity functions through the switching states of the first upper bridge pipe, the first lower bridge pipe, the second upper bridge pipe and the second lower bridge pipe, so that the refrigerant flow direction in the direct-current four-way valve can be switched, the existing double-pole double-throw relay scheme can be replaced, the production cost can be reduced, the occupied area of a circuit board can be reduced, and the popularization and the application as well as the design of a miniaturized scheme are facilitated.

Additional aspects and advantages of the application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the application.

Drawings

The accompanying drawings are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate and do not limit the application.

FIG. 1 is a block diagram of a four-way valve driving circuit according to an embodiment of the present application;

FIG. 2 is a schematic diagram showing a detailed structure of the four-way valve driving circuit shown in FIG. 1;

FIG. 3 is a block diagram showing the overall structure of a four-way valve driving circuit according to another embodiment of the present application;

fig. 4 is a detailed schematic diagram of the four-way valve driving circuit shown in fig. 3.

Detailed Description

Embodiments of the present application are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the application.

In the description of the present application, it should be understood that references to orientation descriptions such as upper, lower, front, rear, left, right, etc. are based on the orientation or positional relationship shown in the drawings, are merely for convenience of description of the present application and to simplify the description, and do not indicate or imply that the apparatus or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus should not be construed as limiting the present application.

In the description of the present application, a number means one or more, a number means two or more, and greater than, less than, exceeding, etc. are understood to not include the present number, and above, below, within, etc. are understood to include the present number. The description of the first and second is for the purpose of distinguishing between technical features only and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.

In the description of the present application, unless explicitly defined otherwise, terms such as arrangement, installation, connection, etc. should be construed broadly and the specific meaning of the terms in the present application can be reasonably determined by a person skilled in the art in combination with the specific contents of the technical scheme.

In some cases, for the current driving circuit of the direct-current four-way valve, a double-pole double-throw relay is generally selected to switch the input voltage of the coil of the direct-current four-way valve, but the scheme adopting the double-pole double-throw relay often has the following disadvantages: the first and double-pole double-throw relays have high cost, so that the popularization and the application are not facilitated; secondly, because the volume of the double-pole double-throw relay is large, the occupied circuit board space is large, and the design of a miniaturized scheme is not facilitated; and the third and double-pole double-throw relays have high failure rate in the actual use process, so that the reliability of the whole circuit is affected.

Based on the above situation, the embodiment of the application provides a four-way valve driving circuit, a circuit board and an air conditioner, which aim to reduce production cost, realize miniaturized layout and improve reliability of the whole circuit.

Because the embodiment of the application is applied to the four-way valve, the structure and the working principle of the four-way valve are explained below, and the structure and the working principle are specifically as follows:

In an air conditioning system, the system has refrigeration and heating functions, the refrigeration and heating switching is required to be satisfied, the system is not separated from a four-way valve, and the main function of the four-way valve is to improve the flow direction of a refrigerant so as to realize the refrigeration and heating switching; the four-way valve has two structural forms, one is a direct-current four-way valve, and the other is an alternating-current four-way valve; the working principle of the alternating current four-way valve is as follows: a sliding block is arranged in the four-way valve, the sliding block is positioned in one direction when power is not supplied, and the sliding block in the interior is switched to the other direction under the magnetic action when alternating current is supplied, but the largest defect needs to be continuously supplied with power and cannot save energy; in order to meet the energy-saving requirement, a direct-current four-way valve can be introduced, a permanent magnet is arranged in a valve body of the direct-current four-way valve, when the core iron is attracted, forward pulse electricity is applied to a coil of the four-way valve, two magnetic fields are mutually overlapped to attract the core iron, then the coil is powered off, the magnetic force and the friction force of the permanent magnet are utilized to overcome the spring force to keep the attracted state, when the core iron needs to be detached, reverse pulse electricity needs to be applied to the coil of the four-way valve, the two magnetic fields are mutually offset, so that the core iron is detached, then the coil is powered off, and the permanent magnet is overcome by means of the spring force and the friction force, so that the iron core is kept in the detached state.

Based on the structure and the working principle of the four-way valve, various embodiments of the four-way valve driving circuit of the present application are further described below with reference to the accompanying drawings.

As shown in fig. 1 and 3, fig. 1 is a general block diagram of a four-way valve driving circuit according to an embodiment of the present application, and fig. 3 is a general block diagram of a four-way valve driving circuit according to another embodiment of the present application. The four-way valve driving circuit of the embodiment of the application comprises, but is not limited to, a positive and negative polarity switching module 100, a first driving amplifying unit 200, a second driving amplifying unit 300 and a valve access end 400, wherein the positive and negative polarity switching module 100 comprises a first bridge arm and a second bridge arm which are connected in parallel, the valve access end 400 is arranged on the first bridge arm and the second bridge arm, and the valve access end 400 is used for accessing a direct current four-way valve; in addition, the first bridge arm includes, but is not limited to, a first upper bridge pipe and a first lower bridge pipe, and the first driving amplification unit 200 is connected to the first lower bridge pipe in the first bridge arm; the second bridge arm includes, but is not limited to, a second upper bridge pipe and a second lower bridge pipe, and the second driving amplification unit 300 is connected with the second lower bridge pipe in the second bridge arm or is connected with the first upper bridge pipe in the first bridge arm and the second lower bridge pipe in the second bridge arm at the same time.

In the operation process, in order to apply forward pulse electricity and reverse pulse electricity to the coils of the direct-current four-way valve respectively, the working process is as follows:

In the case of receiving the first control instruction, as shown in fig. 1, first, the first driving amplifying unit 200 outputs a first switch driving signal to the first lower bridge pipe according to the first control instruction response, and then the first lower bridge pipe is turned on according to the first switch driving signal response; meanwhile, the first lower bridge pipe is conducted to drive the second upper bridge pipe to conduct, so that the first power supply current is output to the direct-current four-way valve through the valve access end 400. Wherein the path of the first supply current is as follows: the second upper bridge pipe and the valve access end 400 are sequentially arranged at the port of the second bridge arm, the direct-current four-way valve and the valve access end 400 are sequentially arranged at the port of the first bridge arm and the first lower bridge pipe.

Under the condition that the second control command is received, first, as shown in fig. 1, the second driving amplifying unit 300 responds and outputs a second switch driving signal to the second lower bridge pipe according to the second control command, then the second lower bridge pipe responds and turns on according to the second switch driving signal, and meanwhile, the second lower bridge pipe turns on and then drives the first upper bridge pipe to turn on, so that the second power supply current is output to the direct current four-way valve through the valve access terminal 400. Or as shown in fig. 3, the second driving amplifying unit 300 outputs a second switch driving signal to the first upper bridge pipe and the second lower bridge pipe according to the second control command response, and then the first upper bridge pipe and the second lower bridge pipe are turned on according to the second switch driving signal response, so that the second power supply current is output to the dc four-way valve through the valve access terminal 400. Wherein the path of the second supply current is as follows: the first upper bridge pipe and the valve access end 400 are sequentially arranged at the port of the first bridge arm, the direct-current four-way valve and the valve access end 400 are sequentially arranged at the port of the second bridge arm and the second lower bridge pipe.

As can be seen from the above, the first power supply current flows into the direct-current four-way valve through the port of the valve access end 400 arranged on the second bridge arm, and then flows out from the port of the valve access end 400 arranged on the first bridge arm; the second power supply current flows into the direct-current four-way valve through the port of the valve access end 400 arranged on the first bridge arm, and then flows out from the port of the valve access end 400 arranged on the second bridge arm. Thus, the direction of the first supply current and the second supply current flowing through the valve access terminal 400 are opposite.

It is worth noting that, in the embodiment of the application, the switching of the positive and negative polarity functions can be realized through the switching states of the bridge arm switches of the first upper bridge pipe, the first lower bridge pipe, the second upper bridge pipe and the second lower bridge pipe, so that the flow direction of the refrigerant in the direct-current four-way valve can be switched, wherein part or all of the bridge arm switches in the embodiment of the application can be semiconductor switching devices for controlling the on-off path of a semiconductor by using a driving signal, the traditional double-pole double-throw relay scheme can be replaced, the control of the double-pole double-throw relay can be omitted, and the advantages of high-frequency and low-frequency control of the semiconductor can be exerted by controlling the semiconductor devices; in addition, the embodiment of the application not only can reduce the production cost, but also can reduce the occupied area of the circuit board, thereby being beneficial to popularization and application and miniaturization scheme design.

It should be noted that, regarding the first control instruction and the second control instruction, if the first control instruction is a heating control instruction, the second control instruction may be a cooling control instruction or a dehumidifying control instruction, respectively; if the first control command is a cooling control command or a dehumidifying control command, the second control command may correspond to a heating control command. The types of the first control instruction and the second control instruction are not particularly limited in the embodiment of the application.

In one embodiment, as shown in fig. 1 and 3, the valve access terminal 400 includes a first access terminal and a second access terminal, the first access terminal is disposed between the first upper bridge pipe and the first lower bridge pipe, and is used to access one end of the coil of the direct current four-way valve; the second access end is arranged between the second upper bridge pipe and the second lower bridge pipe and is used for being connected with the other end of the coil of the direct-current four-way valve.

Specifically, if the first access terminal is a positive access terminal of the direct-current four-way valve coil and the second access terminal is a negative access terminal of the direct-current four-way valve coil, the first supply current is a reverse pulse current, and the second supply current is a forward pulse current. Conversely, if the first access terminal is the negative access terminal of the direct current four-way valve coil and the second access terminal is the positive access terminal of the direct current four-way valve coil, the first supply current is a forward pulse current and the second supply current is a reverse pulse current.

In an embodiment, as shown in fig. 1 and 3, the positive-negative polarity switching module 100 further includes, but is not limited to, a first power supply terminal and a ground terminal, and the first bridge arm and the second bridge arm are connected between the first power supply terminal and the ground terminal.

Specifically, the path of the first supply current is as follows: the power supply flows through the first power supply end, the second upper bridge pipe, the second access end, the direct-current four-way valve, the first access end, the first lower bridge pipe and the grounding end in sequence. In addition, the path of the second supply current is as follows: the power supply flows through the first power supply end, the first upper bridge pipe, the first access end, the direct-current four-way valve, the second access end, the second lower bridge pipe and the grounding end in sequence.

It will be appreciated that with respect to the first power supply terminal described above, vcc1 may be the one shown in fig. 1 and 3; the ground terminal may be GND corresponding to that shown in fig. 1 and 3.

In an embodiment, as shown in fig. 1 to 4, the controlled end of the first lower bridge tube is connected to the output end of the first driving amplifying unit 200, the output end of the first lower bridge tube is connected to the ground, the input end of the first lower bridge tube is connected to the controlled end and the first power supply end of the second upper bridge tube at the same time, and the input end of the second upper bridge tube is connected to the first power supply end.

Specifically, the controlled end of the first lower bridge pipe is configured to receive the first switch driving signal of the first driving amplifying unit 200, and then the first lower bridge pipe will respond to the input end and the output end according to the first switch driving signal, and since the input end of the first lower bridge pipe is also connected to the controlled end of the second upper bridge pipe, when the first lower bridge pipe is turned on, the second upper bridge pipe will also respond to the conduction, and at this time, since the first lower bridge pipe and the second upper bridge pipe are both turned on, a first supply current sequentially flowing through the first power supply end, the second upper bridge pipe, the second access end, the direct current four-way valve, the first access end, the first lower bridge pipe and the ground end will be generated.

In an embodiment, as shown in fig. 1 and fig. 2, in the case that the second lower bridge tube is turned on and drives the first upper bridge tube to be turned on according to the response of the second switch driving signal, the controlled end of the second lower bridge tube is connected to the output end of the second driving amplification unit 300, the output end of the second lower bridge tube is connected to the ground end, the input end of the second lower bridge tube is connected to the controlled end and the first power supply end of the first upper bridge tube at the same time, and the input end of the first upper bridge tube is connected to the first power supply end.

Specifically, the controlled end of the second lower bridge pipe is configured to receive the second switch driving signal of the second driving amplifying unit 300, and then the second lower bridge pipe responds to the conducting input end and the conducting output end according to the second switch driving signal, and since the input end of the second lower bridge pipe is also connected to the controlled end of the first upper bridge pipe, when the second lower bridge pipe is conducting, the first upper bridge pipe also responds to the conducting, and at this time, since the second lower bridge pipe and the first upper bridge pipe are both conducting, a second power supply current sequentially flowing through the first power supply end, the first upper bridge pipe, the first access end, the direct current four-way valve, the second access end, the second lower bridge pipe and the grounding end is generated.

In an embodiment, as shown in fig. 3 and fig. 4, in the case that the first upper bridge pipe and the second lower bridge pipe are turned on according to the response of the second switch driving signal, the first upper bridge pipe is a first relay, the first relay includes a first coil and a first linkage switch, the second lower bridge pipe is a second relay, the second relay includes a second coil and a second linkage switch, the first coil and the second coil are both connected to the first power supply end and the second driving amplifying unit 300, the first linkage switch is disposed between the first power supply end and the first lower bridge pipe, and the second linkage switch is disposed between the second upper bridge pipe and the ground end.

Specifically, when the second driving amplifying unit 300 outputs the second switch driving signal, the first coil and the second coil are both turned on in response to the second driving signal, and then the first coil drives the first linkage switch to be closed, and at the same time, the second coil drives the second linkage switch to be closed, and at this time, since the first linkage switch and the second linkage switch are both in the closed state, the second power supply current sequentially flowing through the first power supply terminal, the first linkage switch, the first access terminal, the direct current four-way valve, the second linkage switch, the second lower bridge pipe and the ground terminal is generated.

It should be noted that, regarding the first upper bridge tube, the first lower bridge tube, the second upper bridge tube, and the second lower bridge tube in fig. 2, and the first lower bridge tube and the second upper bridge tube in fig. 4, they may be field effect transistors, triodes, or other switching tubes capable of controlling on/off, and the structure types of the switching tubes are not particularly limited in the embodiments of the present application.

It is to be understood that, regarding the first upper bridge pipe described above, it may be a switching pipe Q1 corresponding to that shown in fig. 2 or a relay RY1 shown in fig. 4; the first lower bridge pipe may be a switching pipe Q2 corresponding to that shown in fig. 2 and 4; the second upper bridge pipe may be a switching pipe Q3 corresponding to that shown in fig. 2 and 4; the second lower bridge pipe may be a switching pipe Q4 corresponding to that shown in fig. 2 or a relay RY2 shown in fig. 4.

In an embodiment, as shown in fig. 2 and 4, the first driving amplifying unit 200 includes, but is not limited to, a first switching tube and a second switching tube, wherein a controlled end of the first switching tube is used for receiving a first control signal, an input end of the first switching tube is connected with a second power supply end and a controlled end of the second switching tube, an input end of the second switching tube is connected with the first power supply end and the first lower bridge tube, and output ends of the first switching tube and the second switching tube are connected with a ground end.

Specifically, the controlled end of the first switching tube is configured to receive a first control signal, and then the first switching tube will respond to and turn on the input end and the output end according to the first control signal, so that the second power supply end is grounded through the first switching tube, and then the second switching tube is controlled to be turned off, at this time, because of the second switch Guan Jiezhi, the current of the first power supply end will flow to the first lower bridge tube, so that the first lower bridge tube is turned on.

Conversely, if the controlled end of the first switching tube does not receive the first control signal, the first switching tube is in a cut-off state; because the first switching tube is in a cut-off state, the current of the second power supply end flows to the second switching tube, so that the second switching tube is controlled to be conducted; because the second switch tube is in a conducting state, the first power supply end is grounded through the second switch tube, so that the first lower bridge tube cannot be conducted.

It will be appreciated that, regarding the first switching tube described above, it may be a switching tube Q5 corresponding to that shown in fig. 2 and 4; the second switching tube may correspond to the switching tube Q6 shown in fig. 2 and 4, and the second power supply terminal may correspond to Vcc2 shown in fig. 2 and 4.

In an embodiment, as shown in fig. 2, the second driving amplifying unit 300 includes, but is not limited to, a third switching tube and a fourth switching tube, wherein a controlled end of the third switching tube is used for receiving the second control signal, an input end of the third switching tube is connected with a second power supply end and a controlled end of the fourth switching tube, an input end of the fourth switching tube is connected with the first power supply end and the second lower bridge tube, and output ends of the third switching tube and the fourth switching tube are both connected with a ground end.

Specifically, the controlled end of the third switching tube is configured to receive the second control signal, and then the third switching tube will respond to and turn on the input end and the output end according to the second control signal, so that the second power supply end is grounded through the third switching tube, and further the fourth switch Guan Jiezhi is controlled, at this time, because of the fourth switch Guan Jiezhi, the current of the first power supply end will flow to the second lower bridge tube, so that the second lower bridge tube is turned on.

Conversely, if the controlled end of the third switching tube does not receive the second control signal, the third switching tube is in an off state; because the third switching tube is in a cut-off state, the current of the second power supply end flows to the fourth switching tube, so that the fourth switching tube is controlled to be conducted; because the fourth switching tube is in a conducting state, the first power supply end is grounded through the fourth switching tube, so that the second lower bridge tube cannot be conducted.

It will be appreciated that, regarding the third switching tube described above, it may be a switching tube Q8 corresponding to that shown in fig. 2; the fourth switching tube may correspond to the switching tube Q7 shown in fig. 2, and the second power supply terminal may correspond to Vcc2 shown in fig. 2 and 4.

In an embodiment, as shown in fig. 4, the second driving amplifying unit 300 includes, but is not limited to, a fifth switching tube and a sixth switching tube, wherein the controlled ends of the fifth switching tube and the sixth switching tube are used for receiving the second control signal, the output end of the fifth switching tube is connected with the first power supply end, the output end of the sixth switching tube is connected with the ground end, and the input end of the fifth switching tube and the input end of the sixth switching tube are connected with the first coil and the second coil.

Specifically, after receiving the second control signal, the fifth switch Guan Jiezhi and the sixth switch tube are turned on, and for the first coil, current flows through the first power supply end, the first coil, the sixth switch tube and the grounding end in sequence, so that the first coil is electrified, and the first linkage switch is further caused to be closed; meanwhile, for the second coil, current can flow through the first power supply end, the second coil, the sixth switching tube and the grounding end in sequence, so that the second coil is electrified, and the second linkage switch is further promoted to be closed.

It is understood that, regarding the fifth switching tube described above, it may be a switching tube Q8 corresponding to that shown in fig. 4; the sixth switching tube may be a switching tube Q7 corresponding to that shown in fig. 4.

It should be noted that, regarding the first switching tube, the second switching tube, the third switching tube and the fourth switching tube in fig. 2, and the first switching tube, the second switching tube, the fifth switching tube and the sixth switching tube in fig. 4, the first switching tube, the second switching tube, the fifth switching tube and the sixth switching tube may be field effect tubes, triode tubes or other switching tubes capable of controlling on/off, and the structure types of the switching tubes are not particularly limited in the embodiments of the present application.

Based on the four-way valve driving circuit of each of the above embodiments, specific embodiments of the four-way valve driving circuit of the present application are respectively presented below.

In an embodiment, as shown in fig. 1 and fig. 2, when the system works normally, under the condition that the remote controller sends out a refrigeration command, the MCU receives a signal, the refrigeration cool_pwm control signal is set at a high level, after the voltage is switched to another voltage by the second driving amplification unit to control the switching tube to act, the valve access end outputs the voltage to control the direct current four-way valve, and after the control is finished, the MCU drives the cool_pwm to output a low level; similarly, under the condition that the remote controller sends out a heating command, the MCU receives a signal, the heating hot_PWM control signal is placed at a high level, after the voltage is switched to another voltage through the first driving amplifying unit to control the action of the switching tube, the valve access end outputs the voltage to control the direct-current four-way valve, and after the control is finished, the MCU drives the hot_PWM to output a low level.

The basic operation principle of each part of the driving circuit of the direct-current four-way valve shown in fig. 2 is as follows:

1) MCU processing unit (not shown): the unit is used as an executing part for receiving the refrigerating and heating commands of the remote controller; when the remote controller sends a refrigerating command, the MCU sets a cool_PWM signal at a high level, and sets the signal at a low level after switching is completed; similarly, when the remote controller sends a heating command, the MCU sets the hot_PWM signal at a high level, and after the switching is finished, sets the signal at a low level, and keeps the energy-saving state.

2) A first drive amplifying unit: the method is mainly used for completing the enhancement of driving capability and converting to other voltage driving; when heating is detected, the hot_PWM control signal is placed at a high level, the Q5 triode is conducted, the Q6 triode is in a cut-off state, vcc1 voltage flows to the Q2 MOS tube through the R10 resistor, the Q2 MOS tube is in a conducting state for a period of time, the hot_PWM signal is changed into a low level, the Q5 triode is cut off, the Vcc2 voltage drives the Q6 triode to be conducted, and the Q2 MOS tube is in a cut-off state.

3) A second drive amplifying unit: the method is mainly used for completing the enhancement of driving capability and converting to other voltage driving; when refrigeration is detected, the cool_PWM control signal is placed at a high level, the Q8 triode is conducted, the Q7 triode is in a cut-off state, vcc1 voltage flows to the Q4 MOS tube through the R13 resistor, the Q4 MOS tube is in a conducting state for a period of time, the cool_PWM signal is changed into a low level, the Q8 triode is cut off, the Vcc2 voltage drives the Q7 triode to be conducted, and the Q4 MOS tube is in a cut-off state.

4) Positive and negative polarity switching module: comprises two parts, a heating switching unit and a refrigerating switching unit; when the heating mode is adopted, the hot_PWM signal is placed at a high level, the Q5 triode is conducted, the Q6 triode is cut off, so that the Q2 is in a conducting state at Vcc1 voltage, the D, S level is grounded, the D level is connected with the Q3 PMOS pipe for driving, namely the Q3 PMOS pipe is in a conducting state, vcc1 passes through the R11 resistor, the R11 resistor plays a role in limiting and voltage dividing, so that the current flows to a coil of the direct current four-way valve, the ground flows back from the Q2 NMOS pipe, the 1 foot of the direct current four-way valve CN61 is grounded, the 2 foot is connected with a power supply, the heating switching is completed, the hot_PWM signal is changed to a low level for a certain period of time, the Q5 triode is cut off, the Q6 triode is conducted, the Q2 NMOS pipe is cut off, and the Q3 PMOS is also in a cut-off state; when in a refrigeration mode, the cool_PWM signal is placed at a high level, the Q8 triode is conducted, the Q7 triode is cut off, so that the Q4 is in a conducting state at Vcc1 voltage, as the Q4 is conducted, the D, S level is grounded, the D level is connected with the Q1PMOS tube for driving, namely the Q1PMOS tube is in a conducting state, vcc1 flows to a coil of the direct current four-way valve through the Q1, flows back to the ground from the Q4 NMOS tube, the 1 foot of the direct current four-way valve CN61 is connected with a power supply, the 2 foot is grounded, refrigeration switching is completed, positive and negative polarity switching is completed at the same time, the cool_PWM signal is changed to a low level, the Q8 triode is cut off, the Q7 triode is conducted, the Q4 NMOS tube is cut off, and the Q1PMOS is also in a cut-off state.

As shown in fig. 1 and 2, the embodiment of the present application has an advantage in that relay control is omitted, and a circuit controlled by a semiconductor device exerts the advantage of high-frequency and low-frequency control of a semiconductor. In the embodiment of the application, the positive and negative polarity function switching can be realized through the semiconductor, Q1 to Q4 in FIG. 2 are not limited by MOS tube devices, IGBT devices are suitable as well, and the advantages of the semiconductor are exerted; secondly, the embodiment of the application can replace a relay, thereby realizing miniaturized layout, not being limited to the construction of discrete devices, and also being capable of adopting the integration of the discrete devices and the control of an integrated circuit; moreover, compared with a relay, the embodiment of the application has the advantages of higher actuation speed, more accurate control and high-speed power on; in addition, the circuit of the embodiment of the application can be integrated and has more complete functions.

In another embodiment, as shown in fig. 3 and fig. 4, when the system works normally, under the condition that the remote controller sends out a refrigeration command, the MCU receives a signal, the refrigeration cool_pwm control signal is set at a high level, after the voltage is switched to another voltage by the second driving amplification unit to control the switching tube to act, the valve access end outputs the voltage to control the direct current four-way valve, and after the control is finished, the MCU drives the cool_pwm to output a low level; similarly, under the condition that the remote controller sends out a heating command, the MCU receives a signal, the heating hot_PWM control signal is placed at a high level, after the voltage is switched to another voltage through the first driving amplifying unit to control the action of the switching tube, the valve access end outputs the voltage to control the direct-current four-way valve, and after the control is finished, the MCU drives the hot_PWM to output a low level.

The basic operation principle of each part of the driving circuit of the direct-current four-way valve shown in fig. 4 is as follows:

1) MCU processing unit (not shown): the unit is used as an executing part for receiving the refrigerating and heating commands of the remote controller; when the remote controller sends a refrigerating command, the MCU sets a cool_PWM signal at a high level, and sets the signal at a low level after switching is completed; similarly, when the remote controller sends a heating command, the MCU sets the hot_PWM signal at a high level, and after the switching is finished, sets the signal at a low level, and keeps the energy-saving state.

2) A first drive amplifying unit: the method is mainly used for completing the enhancement of driving capability and converting to other voltage driving; when heating is detected, the hot_PWM control signal is placed at a high level, the Q5 triode is conducted, the Q6 triode is in a cut-off state, vcc1 voltage flows to the Q2 MOS tube through the R10 resistor, the Q2 MOS tube is in a conducting state for a period of time, the hot_PWM signal is changed into a low level, the Q5 triode is cut off, the Vcc2 voltage drives the Q6 triode to be conducted, and the Q2 MOS tube is in a cut-off state.

3) A second drive amplifying unit: the method is mainly used for mainly completing the enhancement of driving capability and converting to other voltage driving; when refrigeration is detected, the cool_PWM control signal is placed at a high level, the Q7 triode is conducted, the Q8 triode is in a cut-off state, the driving parts of the relays RY1 and RY2 are powered on, so that the relays are attracted for a period of time, the cool_PWM signal becomes a low level, the Q7 triode is cut off, and the Q8 triode is conducted, so that the relays are in a cut-off state.

4) Positive and negative polarity switching module: comprises two parts, a heating switching unit and a refrigerating switching unit; when the heating mode is adopted, the hot_PWM signal is placed at a high level, the Q5 triode is conducted, the Q6 triode is cut off, so that the Q2 is in a conducting state at Vcc1 voltage, the D, S level is grounded, the D level is connected with the Q3 PMOS pipe for driving, namely the Q3 PMOS pipe is in a conducting state, vcc1 passes through the R11 resistor, the R11 resistor plays a role in limiting and voltage dividing, so that the current flows to a coil of the direct current four-way valve, the ground flows back from the Q2 NMOS pipe, the 1 foot of the direct current four-way valve CN61 is grounded, the 2 foot is connected with a power supply, the heating switching is completed, the hot_PWM signal is changed to a low level for a certain period of time, the Q5 triode is cut off, the Q6 triode is conducted, the Q2 NMOS pipe is cut off, and the Q3 PMOS is also in a cut-off state; when in the refrigeration mode, the cool_pwm signal is placed at a high level, the Q7 triode is turned on, the Q8 triode is turned off, so that the driving parts of the relays RY1 and RY2 are powered on, the relays are powered on, vcc1 flows to the coil of the direct-current four-way valve through RY1 due to the attraction of the RY1 and RY2, and flows back to the ground from RY2, the 1 foot of the direct-current four-way valve CN61 is connected with the power supply, the 2 foot is grounded, the refrigeration switching is completed, meanwhile, the positive and negative polarity switching is completed for a period of time, the cool_pwm signal becomes a low level, the Q7 triode is turned off, the Q8 triode is turned on, and the RY1 and RY2 are in an off state.

As shown in fig. 3 and 4, the embodiment of the present application has an advantage in that relay control is omitted, and a circuit controlled by a semiconductor device exerts the advantage of high-frequency and low-frequency control of a semiconductor. In the embodiment of the application, the positive and negative polarity function switching can be realized through the semiconductor, Q2 and Q3 in FIG. 4 are not limited by MOS tube devices, and IGBT devices are also suitable to exert the advantages of the semiconductor; secondly, the embodiment of the application can combine the relay and the semiconductor to realize the function of switching the positive polarity and the negative polarity of the voltage; furthermore, the embodiment of the application can realize the given signals of the upper bridge arm switch and the lower bridge arm switch, thereby realizing diversification; in addition, the circuit of the embodiment of the application can be integrated and has more complete functions.

Based on the four-way valve driving circuit of each of the above embodiments, each of the embodiments of the circuit board and the air conditioner of the present application is set forth below, respectively.

An embodiment of the present application further provides a circuit board, including the four-way valve driving circuit of any one of the above embodiments.

It should be noted that, since the circuit board of the embodiment of the present application includes the four-way valve driving circuit of any one of the embodiments, the specific implementation and the technical effect of the circuit board of the embodiment of the present application may refer to the specific implementation and the technical effect of the four-way valve driving circuit of any one of the embodiments.

In addition, an embodiment of the present application provides an air conditioner, which includes the dc four-way valve and the circuit board of the above embodiment, and the coil in the dc four-way valve is connected to the valve access terminal in the circuit board.

It should be noted that, since the air conditioner according to the embodiment of the present application includes the circuit board of the above embodiment, and the circuit board of the above embodiment includes the four-way valve driving circuit of any one of the above embodiments, the specific implementation and technical effects of the air conditioner according to the embodiment of the present application may refer to the specific implementation and technical effects of the four-way valve driving circuit of any one of the above embodiments.

In the description of embodiments of the present application, unless explicitly stated and limited otherwise, the terms "connected," "directly connected," "indirectly connected," "fixedly connected," "mounted," "assembled" should be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; the terms "mounted," "connected," and "fixedly connected" may be directly connected or indirectly connected through intervening media, and may also be in communication between two elements. The specific meaning of the above terms in the present application will be understood in specific cases by those of ordinary skill in the art.

Although the embodiments of the present application are described above, the present application is not limited to the embodiments which are used for understanding the present application. Any person skilled in the art can make any modification and variation in form and detail without departing from the spirit and scope of the present disclosure, but the scope of the present disclosure is defined by the appended claims.

While the preferred embodiment of the present application has been described in detail, the present application is not limited to the above embodiments, and those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit and scope of the present application, and these equivalent modifications or substitutions are included in the scope of the present application as defined in the appended claims.

Claims (12)

1. A four-way valve drive circuit, comprising:

The positive and negative polarity switching module comprises a first bridge arm and a second bridge arm, wherein the first bridge arm is provided with a first upper bridge pipe and a first lower bridge pipe, and the second bridge arm is provided with a second upper bridge pipe and a second lower bridge pipe;

The first driving amplifying unit is connected to the first lower bridge pipe and is used for outputting a first switch driving signal;

A second driving amplifying unit connected to the second lower bridge pipe or connected to the first upper bridge pipe and the second lower bridge pipe for outputting a second switch driving signal;

The valve access end is arranged on the first bridge arm and the second bridge arm;

The first lower bridge tube is in response conduction according to the first switch driving signal and drives the second upper bridge tube to be conducted so that a first power supply current is output to the direct-current four-way valve through the valve access end;

The second lower bridge tube is in response conduction according to the second switch driving signal and drives the first upper bridge tube to be in conduction, or the first upper bridge tube and the second lower bridge tube are in response conduction according to the second switch driving signal, so that a second power supply current is output to the direct-current four-way valve through the valve access end; wherein the first supply current and the second supply current flowing through the valve access terminal are in opposite directions.

2. The four-way valve driving circuit according to claim 1, wherein the positive-negative polarity switching module further comprises a first power supply terminal and a ground terminal, and the first bridge arm and the second bridge arm are connected between the first power supply terminal and the ground terminal.

3. The four-way valve driving circuit according to claim 2, wherein the controlled end of the first lower bridge pipe is connected to the output end of the first driving amplifying unit, the output end of the first lower bridge pipe is connected to the ground, the input end of the first lower bridge pipe is connected to the controlled end of the second upper bridge pipe and the first power supply end, and the input end of the second upper bridge pipe is connected to the first power supply end.

4. The four-way valve driving circuit according to claim 2, wherein in a case where the second lower bridge tube is turned on in response to the second switch driving signal and drives the first upper bridge tube to be turned on, a controlled end of the second lower bridge tube is connected to an output end of the second drive amplifying unit, an output end of the second lower bridge tube is connected to the ground, an input end of the second lower bridge tube is connected to a controlled end of the first upper bridge tube and the first power supply end, and an input end of the first upper bridge tube is connected to the first power supply end.

5. The four-way valve driving circuit according to claim 2, wherein in a case where the first upper bridge pipe and the second lower bridge pipe are turned on in response to the second switch driving signal, the first upper bridge pipe is a first relay including a first coil and a first interlock switch, the second lower bridge pipe is a second relay including a second coil and a second interlock switch, the first coil and the second coil are both connected to the first power supply terminal and the second driving amplification unit, the first interlock switch is disposed between the first power supply terminal and the first lower bridge pipe, and the second interlock switch is disposed between the second upper bridge pipe and the ground terminal.

6. The four-way valve driving circuit according to claim 3, wherein the first driving amplifying unit comprises a first switching tube and a second switching tube, a controlled end of the first switching tube is used for receiving a first control signal, an input end of the first switching tube is connected to a second power supply end and a controlled end of the second switching tube, an input end of the second switching tube is connected to the first power supply end and the first lower bridge tube, and output ends of the first switching tube and the second switching tube are connected to the ground end.

7. The four-way valve driving circuit according to claim 4, wherein the second driving amplifying unit comprises a third switching tube and a fourth switching tube, wherein a controlled end of the third switching tube is used for receiving a second control signal, an input end of the third switching tube is connected to a second power supply end and a controlled end of the fourth switching tube, an input end of the fourth switching tube is connected to the first power supply end and the second lower bridge tube, and output ends of the third switching tube and the fourth switching tube are both connected to the ground end.

8. The four-way valve driving circuit according to claim 5, wherein the second driving amplifying unit comprises a fifth switching tube and a sixth switching tube, wherein the controlled ends of the fifth switching tube and the sixth switching tube are used for receiving a second control signal, the output end of the fifth switching tube is connected to the first power supply end, the output end of the sixth switching tube is connected to the ground end, and the input end of the fifth switching tube and the input end of the sixth switching tube are connected to the first coil and the second coil.

9. The four-way valve drive circuit of claim 2, wherein the valve access terminal comprises a first access terminal and a second access terminal, the first access terminal being disposed between the first upper bridge tube and the first lower bridge tube, the second access terminal being disposed between the second upper bridge tube and the second lower bridge tube.

10. The four-way valve driving circuit according to claim 9, wherein the first power supply current flows through the first power supply terminal, the second upper bridge pipe, the second access terminal, the first lower bridge pipe, and the ground terminal in this order; the second power supply current sequentially flows through the first power supply end, the first upper bridge pipe, the first access end, the second lower bridge pipe and the grounding end.

11. A wiring board comprising the four-way valve driving circuit according to any one of claims 1 to 10.

12. An air conditioner, characterized by comprising a direct-current four-way valve and the circuit board according to claim 11, wherein a coil in the direct-current four-way valve is connected to the valve access terminal in the circuit board.