CN210154023U - Air conditioning system pressure and power supply voltage protection device and air conditioner - Google Patents
Air conditioning system pressure and power supply voltage protection device and air conditioner Download PDFInfo
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- CN210154023U CN210154023U CN201921012414.0U CN201921012414U CN210154023U CN 210154023 U CN210154023 U CN 210154023U CN 201921012414 U CN201921012414 U CN 201921012414U CN 210154023 U CN210154023 U CN 210154023U
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Abstract
The utility model provides an air conditioning system pressure and mains voltage protection device and air conditioner, air conditioning system pressure and mains voltage protection device are including control mainboard, voltage detection device and pressure switch, wherein: the voltage detection device is respectively electrically connected with the control mainboard and the air conditioner power supply and is used for detecting the power supply voltage and disconnecting the power supply voltage when the power supply voltage exceeds a set range; the pressure switch is electrically connected with the control main board and is used for detecting the operating pressure of the system and disconnecting the pressure switch when the operating pressure exceeds a set range; the control main board is used for protecting an air conditioner when the voltage detection device and/or the pressure switch are disconnected. The air-conditioning system pressure and power supply voltage protection device can timely detect the abnormal states of the system pressure and the power supply voltage, timely protects the air conditioner when the system pressure or the power supply voltage is abnormal, avoids damaging the air conditioner, and is high in safety.
Description
Technical Field
The utility model relates to an air conditioner technical field particularly, relates to an air conditioning system pressure and mains voltage protection device and air conditioner.
Background
When the air conditioner is operated, the system is damaged by overhigh or overlow system pressure and overhigh or overlow power supply voltage. At present, the conventional air conditioner is difficult to effectively protect the air conditioner when the system pressure or the power supply voltage is abnormal, and the safety is low.
Therefore, a user needs to provide an effective protection device for the air conditioner when the system pressure or the power supply voltage is abnormal.
SUMMERY OF THE UTILITY MODEL
The utility model provides a problem be: the existing air conditioner is difficult to effectively protect the air conditioner when the system pressure or the power supply voltage is abnormal.
In order to solve the above problem, the utility model provides an air conditioning system pressure and mains voltage protection device is including control mainboard, voltage detection device and pressure switch, wherein:
the voltage detection device is respectively electrically connected with the control mainboard and the air conditioner power supply and is used for detecting the power supply voltage and disconnecting the power supply voltage when the power supply voltage exceeds a set range;
the pressure switch is electrically connected with the control main board and is used for detecting the operating pressure of the system and disconnecting the pressure switch when the operating pressure exceeds a set range;
the control main board is used for protecting an air conditioner when the voltage detection device and/or the pressure switch are disconnected.
Therefore, the abnormal states of the system pressure and the power supply voltage can be detected in time, the air conditioner is protected in time when the system pressure or the power supply voltage is abnormal, damage to the air conditioner is avoided, and the safety is higher.
Optionally, the voltage detection device is connected in series with the pressure switch and is connected to the same port of the control mainboard.
Therefore, on the premise of protecting the pressure of the air conditioning system and the power supply voltage, the interface of the control mainboard is released, pin resources are saved, and the practicability is high.
Optionally, the voltage detection device includes a relay.
The relay can control high voltage by low voltage and realize remote automatic control.
Optionally, the voltage detection device includes a rectification circuit, an overvoltage protection circuit and a switching tube, wherein:
the input end of the rectifying circuit is electrically connected with the power supply, and the output end of the rectifying circuit is electrically connected with the input end of the overvoltage protection circuit;
the output end of the overvoltage protection circuit is electrically connected with the grid electrode of the switch tube, and the overvoltage protection circuit outputs a low level to the switch tube when the output voltage of the rectifying circuit exceeds a set range;
the control mainboard is grounded through the switch tube, and the switch tube is disconnected after receiving the low level output by the overvoltage protection circuit.
Therefore, the voltage detection device can detect the power supply voltage in real time and is disconnected when the power supply voltage is abnormal, so that the control mainboard can protect the air conditioner when the voltage detection device is disconnected.
Optionally, the rectifier circuit includes a rectifier bridge, a first resistor and a second resistor, an output end of the rectifier bridge sequentially passes through the first resistor and the second resistor, and is grounded, and a common end of the first resistor and the second resistor is electrically connected with an input end of the overvoltage protection circuit.
Thus, the rectifying circuit can convert the power supply voltage into a voltage which can be detected by the overvoltage protection circuit.
Optionally, the overvoltage protection circuit includes a first voltage regulator tube, a second voltage regulator tube, a first triode, a second triode, and a third triode, an output end of the rectifier circuit is electrically connected to a gate of the switch tube and a base of the third triode, and an output end of the rectifier circuit is also electrically connected to the base of the first triode through the first voltage regulator tube and the base of the second triode through the second voltage regulator tube; the output end of the rectifying circuit and the common end of the base level of the third triode are grounded through the first triode and the second triode respectively; the output end of the rectifying circuit and the common end of the grid electrode of the switch tube are grounded through the third triode.
Therefore, the overvoltage protection circuit can control the switch tube to be turned off when the power supply voltage is too high and too low, so that the control mainboard can protect the air conditioner when the switch tube is turned off.
Optionally, the air conditioning system pressure and power supply voltage protection device further includes a fault indication device, and the fault indication device is electrically connected to the control main board and is used for indicating a fault when the voltage detection device and/or the pressure switch is disconnected.
Therefore, maintenance personnel can find the abnormal state of the power supply voltage or the system pressure in time, and timely maintenance is facilitated.
Optionally, the fault indication device includes an indicator light, and the control main board controls the indicator light to be turned on when the voltage detection device and/or the pressure switch is turned off.
Therefore, maintenance personnel can find the abnormal state of the power supply voltage or the system pressure in time conveniently, and the maintenance is convenient in time; and the maintenance personnel can find out which abnormal state in time, which is beneficial to accelerating the maintenance process.
Optionally, the fault indication device further includes a buzzer, and the control main board controls the buzzer to alarm when the voltage detection device and/or the pressure switch is turned off.
Therefore, maintenance personnel can find the abnormal state of the power supply voltage or the system pressure in time, and timely maintenance is facilitated.
Another object of the present invention is to provide an air conditioner to solve the problem that the conventional air conditioner is difficult to effectively protect the air conditioner when the system pressure or the power supply voltage is abnormal.
In order to achieve the above purpose, the technical scheme of the utility model is realized like this:
an air conditioner comprises any one of the air conditioning system pressure and power supply voltage protection devices.
Compared with the prior art, the air conditioner has the same advantages as the air conditioner system pressure and power supply voltage protection device, and the description is omitted.
Drawings
Fig. 1 is a schematic diagram of an air conditioning system pressure and power supply voltage protection device according to an embodiment of the present invention;
fig. 2 is a schematic connection diagram of an air conditioning system pressure and power supply voltage protection device according to an embodiment of the present invention;
fig. 3 is a circuit diagram of a voltage detection device according to an embodiment of the present invention;
fig. 4 is another schematic diagram of an air conditioning system pressure and supply voltage protection device according to an embodiment of the present invention.
Description of reference numerals:
10-control the mainboard; 20-voltage detection means; 201-a rectifying circuit; 202-overvoltage protection circuit; 30-a pressure switch; 40-a fault indication device; DB 1-rectifier bridge; r1 — first resistance; r2 — second resistance; ZD 1-first voltage regulator tube; ZD 2-a second voltage regulator tube; q1-first triode; q2-second transistor; q3-third transistor; s1-switching tube.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention more comprehensible, embodiments accompanied with figures are described in detail below.
Fig. 1 is a schematic diagram of a protection device for air conditioning system pressure and power supply voltage in the present embodiment; wherein, air conditioning system pressure and mains voltage protection device is including controlling mainboard 10, voltage detection device 20 and pressure switch 30, wherein:
the voltage detection device 20 is respectively electrically connected with the control main board 10 and the air conditioner power supply, and is used for detecting the power supply voltage and disconnecting the power supply voltage when the power supply voltage exceeds a set range;
the pressure switch 30 is electrically connected with the control main board 10, and is used for detecting the operating pressure of the system and disconnecting the pressure switch when the operating pressure exceeds a set range;
the control main board 10 is used for protecting the air conditioner when the voltage detection device 20 and/or the pressure switch 30 are turned off.
The pressure switch 30 is a commonly used device for detecting pressure, and controls the suction thereof by detecting pressure.
The fact that the power supply voltage of the air conditioner exceeds the set range represents that the power supply voltage is too high or too low, namely the power supply voltage is in an abnormal state; the operating pressure of the system exceeding the set range represents that the operating pressure is too high or too low, i.e., the system pressure is in an abnormal state. In this embodiment, the voltage detection device 20 detects the power supply voltage of the air conditioner in real time, when the power supply voltage of the air conditioner is abnormal, the voltage detection device 20 is turned off in time when detecting an abnormal state, and the control main board 10 protects the air conditioner after receiving a turn-off signal of the voltage detection device 20; the pressure switch 30 is located at an exhaust position or an air suction position of the system and used for detecting the operating pressure of the air conditioning system in real time, when the operating pressure of the system is abnormal, the pressure switch 30 is timely disconnected when detecting an abnormal state, and the control main board 10 can protect the air conditioner after receiving a disconnection signal of the pressure switch 30.
Like this, the air conditioning system pressure in this embodiment and mains voltage protection device can in time detect system pressure and mains voltage's abnormal state to in time protect the air conditioner when system pressure or mains voltage are unusual, avoid causing the harm to the air conditioner, the security is higher.
Optionally, the set range of the power voltage is 200-240V, and the set range of the operating pressure is 0.15-4.2 MPa. The voltage detection device 20 is turned off when detecting that the power supply voltage is lower than 200V or higher than 240V, and the pressure switch 30 is turned off when detecting that the operating pressure of the system is lower than 0.15MPa or higher than 4.2 MPa.
Alternatively, as shown in fig. 2, the voltage detection device 20 is connected in series with the pressure switch 30 and is connected to the same port of the control main board 10.
Wherein the same port may be a pressure switch 30 port of the control motherboard 10. The control main board 10, the voltage detection device 20 and the pressure switch 30 form a closed loop together. Because the voltage detection device 20 is connected with the pressure switch 30 in series, when the voltage detection device 20 is disconnected, the air conditioning system pressure and power supply voltage protection device is disconnected no matter whether the pressure switch 30 is disconnected or not; similarly, when the pressure switch 30 is turned off, the protection device for the air conditioning system pressure and the power supply voltage is also turned off regardless of whether the voltage detection device 20 is turned off.
Like this, air conditioning system pressure and mains voltage protection device in this embodiment release the interface of control mainboard 10 under the prerequisite of realizing air conditioning system pressure and mains voltage protection, have practiced thrift the pin resource, and the practicality is strong.
Optionally, the voltage detection device 20 and the pressure switch 30 may also be connected to different ports of the control motherboard 10, so that the voltage detection device 20 and the pressure switch 30 are in a parallel relationship, and will not be described in detail here.
Optionally, the voltage detection device 20 includes a relay, such as a relay of DPB51, DPB52, or the like.
The relay may be opened when the supply voltage is outside a set range and closed when the supply voltage returns to a normal level. The relay can control high voltage by low voltage and realize remote automatic control.
Optionally, as shown in fig. 3, the voltage detection device 20 includes a rectification circuit 201, an overvoltage protection circuit 202, and a switching tube S1, wherein:
the input end of the rectifying circuit 201 is electrically connected with the power supply, and the output end of the rectifying circuit is electrically connected with the input end of the overvoltage protection circuit 202;
the output end of the overvoltage protection circuit 202 is electrically connected to the gate of the switch tube S1, and the overvoltage protection circuit 202 outputs a low level to the switch tube S1 when the output voltage of the rectifier circuit 201 exceeds a set range;
the control main board 10 is grounded through the switch tube S1, and the switch tube S1 is turned off after receiving the low level output by the overvoltage protection circuit 202.
If the voltage detection device 20 is connected in series with the pressure switch 30, the control main board 10 is grounded through the switch tube S1 and the pressure switch 30 in sequence. The switch tube S1 is turned on at low level.
The rectifying circuit 201 is used for converting alternating current of a power supply into direct current, and converting the direct current into voltage which can be detected by the overvoltage protection circuit 202. When the power supply voltage is abnormal, the output voltage of the rectifying circuit 201 exceeds a set range, and the overvoltage protection circuit 202 outputs a low level signal to the gate of the switching tube S1 when the output voltage of the rectifying circuit 201 is too high or too low, so as to control the switching tube S1 to be turned off, thereby disconnecting the voltage detection device 20 from the air conditioning system pressure and power supply voltage protection device, and controlling the main board 10 to protect the air conditioner when the switching tube S1 is turned off.
In this way, the voltage detection device 20 can detect the power voltage in real time and turn off when the power voltage is abnormal, so as to control the main board 10 to protect the air conditioner when the voltage detection device 20 turns off.
Optionally, the switching tube S1 may be a MOS tube or an IGBT tube.
Optionally, the rectifier circuit 201 includes a rectifier bridge DB1, a first resistor R1 and a second resistor R2, an output end of the rectifier bridge DB1 is sequentially grounded through the first resistor R1 and the second resistor R2, and a common end of the first resistor R1 and the second resistor R2 is electrically connected to an input end of the overvoltage protection circuit 202.
The first resistor R1 and the second resistor R2 are used as voltage dividing resistors, and are configured to convert the current output by the rectifier bridge DB1 into a voltage and divide the voltage to output a voltage that can be detected by the overvoltage protection circuit 202, and a common end of the first resistor R1 and the second resistor R2 is an output end of the rectifier circuit 201.
Thus, the rectifier circuit 201 can convert the power supply voltage into a voltage that can be detected by the overvoltage protection circuit 202.
Optionally, the overvoltage protection circuit 202 includes a first voltage regulator ZD1, a second voltage regulator ZD2, a first triode Q1, a second triode Q2, and a third triode Q3, an output end of the rectifier circuit 201 is electrically connected to both the gate of the switch tube S1 and the base of the third triode Q3, and an output end of the rectifier circuit 201 is also electrically connected to the base of the first triode Q1 through the first voltage regulator ZD1 and electrically connected to the base of the second triode Q2 through the second voltage regulator ZD 2; the output end of the rectifying circuit 201 and the common end of the base stage of the third triode Q3 are grounded through the first triode Q1 and the second triode Q2 respectively; the output end of the rectifying circuit 201 and the common end of the grid electrode of the switching tube S1 are grounded through the third triode Q3.
The first transistor Q1 is an NPN transistor, and the second transistor Q2 and the third transistor Q3 are PNP transistors. The parameters of the first zener ZD1 are set as: when the power supply voltage is too high, the first voltage regulator ZD1 is turned on. The parameters of the second zener ZD2 are set as: when the power supply voltage is too low, the second zener ZD2 is turned on. Thus, when the power supply voltage is too low, the second voltage regulator tube ZD2 is turned on, the base level of the second triode Q2 is high level, the second triode Q2 is turned on, the base level of the third triode Q3 is grounded through the second triode Q2, the third triode Q3 is turned on, the gate of the switch tube S1 is grounded through the third triode Q3, and the switch tube S1 is turned off; when the power supply voltage is too high, the first voltage-regulator tube ZD1 and the second voltage-regulator tube ZD2 are both conducted, the base level of the first triode Q1 is high level, the first triode Q1 is conducted, the base level of the third triode Q3 is grounded through the first triode Q1, the third triode Q3 is conducted, the grid electrode of the switch tube S1 is grounded through the third triode Q3, and the switch tube S1 is turned off; when the power supply voltage is in the set range, the first triode Q1 and the second triode Q2 are both turned off, the third triode Q3 is turned off, and the switch tube S1 is turned on.
In this way, the overvoltage protection circuit 202 can control the switch tube S1 to turn off when the power voltage is too high or too low, so as to control the main board 10 to protect the air conditioner when the switch tube S1 is turned off.
Optionally, as shown in fig. 4, the air conditioning system pressure and power supply voltage protection device further includes a fault indication device 40, where the fault indication device 40 is electrically connected to the control main board 10, and is configured to indicate a fault when the voltage detection device 20 and/or the pressure switch 30 is turned off.
Therefore, maintenance personnel can find the abnormal state of the power supply voltage or the system pressure in time, and timely maintenance is facilitated.
Optionally, the fault indication device 40 includes an indicator light, and the control main board 10 controls the indicator light to be turned on when the voltage detection device 20 and/or the pressure switch 30 is turned off.
Specifically, the number of the indicator lights may be 1, and the indicator lights have two light emitting colors, and respectively display different colors when the voltage detection device 20 or the pressure switch 30 is turned off; the indicator lamps may be 2 and have different light emitting colors, one of which is turned on when the voltage detection device 20 is turned off and the other of which is turned on when the pressure switch 30 is turned off.
Therefore, maintenance personnel can find the abnormal state of the power supply voltage or the system pressure in time conveniently, and the maintenance is convenient in time; and the maintenance personnel can find out which abnormal state in time, which is beneficial to accelerating the maintenance process.
Optionally, the fault indication device 40 further includes a buzzer, and the control main board 10 controls the buzzer to alarm when the voltage detection device 20 and/or the pressure switch 30 is turned off.
Therefore, maintenance personnel can find the abnormal state of the power supply voltage or the system pressure in time, and timely maintenance is facilitated.
The embodiment also provides an air conditioner, which comprises any one of the air conditioning system pressure and power supply voltage protection devices. The air conditioner can timely detect the abnormal states of the system pressure and the power supply voltage, and timely protect the air conditioner when the system pressure or the power supply voltage is abnormal, so that damage to the air conditioner is avoided, and the safety is higher.
Although the present invention is disclosed above, the present invention is not limited thereto. Various changes and modifications may be effected therein by one of ordinary skill in the pertinent art without departing from the scope or spirit of the present invention, and the scope of the present invention is defined by the appended claims.
Claims (10)
1. The utility model provides an air conditioning system pressure and mains voltage protection device which characterized in that, includes control mainboard (10), voltage detection device (20) and pressure switch (30), wherein:
the voltage detection device (20) is respectively electrically connected with the control main board (10) and the air conditioner power supply and is used for detecting the power supply voltage and disconnecting the power supply voltage when the power supply voltage exceeds a set range;
the pressure switch (30) is electrically connected with the control main board (10) and is used for detecting the operating pressure of the system and disconnecting the pressure switch when the operating pressure exceeds a set range;
the control main board (10) is used for protecting the air conditioner when the voltage detection device (20) and/or the pressure switch (30) are/is turned off.
2. Air conditioning system pressure and supply voltage protection device according to claim 1, characterized in that said voltage detection means (20) are connected in series with said pressure switch (30) and are connected to the same port of said control motherboard (10).
3. Air conditioning system pressure and supply voltage protection device according to claim 1 or 2, characterized in that said voltage detection means (20) comprise a relay.
4. The air conditioning system pressure and supply voltage protection device according to claim 1 or 2, wherein the voltage detection device (20) comprises a rectification circuit (201), an overvoltage protection circuit (202) and a switching tube (S1), wherein:
the input end of the rectifying circuit (201) is electrically connected with the power supply, and the output end of the rectifying circuit is electrically connected with the input end of the overvoltage protection circuit (202);
the output end of the overvoltage protection circuit (202) is electrically connected with the grid electrode of the switch tube (S1), and the overvoltage protection circuit (202) outputs a low level to the switch tube (S1) when the output voltage of the rectifying circuit (201) exceeds a set range;
the control main board (10) is grounded through the switch tube (S1), and the switch tube (S1) is disconnected after receiving the low level output by the overvoltage protection circuit (202).
5. The air conditioning system pressure and power supply voltage protection device according to claim 4, wherein the rectification circuit (201) comprises a rectification bridge (DB1), a first resistor (R1) and a second resistor (R2), an output end of the rectification bridge (DB1) is connected to the ground through the first resistor (R1) and the second resistor (R2) in sequence, and a common end of the first resistor (R1) and the second resistor (R2) is electrically connected with an input end of the overvoltage protection circuit (202).
6. The air conditioning system pressure and power supply voltage protection device according to claim 4, wherein the overvoltage protection circuit (202) comprises a first voltage regulator tube (ZD1), a second voltage regulator tube (ZD2), a first triode (Q1), a second triode (Q2) and a third triode (Q3), the output end of the rectification circuit (201) is electrically connected with the grid electrode of the switch tube (S1) and the base stage of the third triode (Q3), and the output end of the rectification circuit (201) is also electrically connected with the base stage of the first triode (Q1) through the first voltage regulator tube (ZD1) and the base stage of the second triode (Q2) through the second voltage regulator tube (ZD 2); the output end of the rectifying circuit (201) and the common end of the base stage of the third triode (Q3) are grounded through the first triode (Q1) and the second triode (Q2) respectively; the output end of the rectifying circuit (201) and the common end of the grid electrode of the switching tube (S1) are grounded through the third triode (Q3).
7. Air conditioning system pressure and supply voltage protection device according to claim 1 or 2, characterized in that it further comprises a fault indication device (40), said fault indication device (40) being electrically connected to said control motherboard (10) for indicating a fault when said voltage detection device (20) and/or said pressure switch (30) is open.
8. Air conditioning system pressure and supply voltage protection device according to claim 7, characterized in that said fault indication means (40) comprise an indicator light, said control main board (10) controlling said indicator light to light up when said voltage detection means (20) and/or said pressure switch (30) are turned off.
9. Air conditioning system pressure and supply voltage protection device according to claim 7, characterized in that said fault indication means (40) further comprise a buzzer, said control main board (10) controlling said buzzer to alarm when said voltage detection means (20) and/or said pressure switch (30) are turned off.
10. An air conditioner characterized by comprising an air conditioning system pressure and supply voltage protection device as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921012414.0U CN210154023U (en) | 2019-07-01 | 2019-07-01 | Air conditioning system pressure and power supply voltage protection device and air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921012414.0U CN210154023U (en) | 2019-07-01 | 2019-07-01 | Air conditioning system pressure and power supply voltage protection device and air conditioner |
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| Publication Number | Publication Date |
|---|---|
| CN210154023U true CN210154023U (en) | 2020-03-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201921012414.0U Active CN210154023U (en) | 2019-07-01 | 2019-07-01 | Air conditioning system pressure and power supply voltage protection device and air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN210154023U (en) |
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2019
- 2019-07-01 CN CN201921012414.0U patent/CN210154023U/en active Active
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