CN218497996U - Air conditioner and high-voltage switch self-locking circuit thereof - Google Patents
Air conditioner and high-voltage switch self-locking circuit thereof Download PDFInfo
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- CN218497996U CN218497996U CN202221946121.1U CN202221946121U CN218497996U CN 218497996 U CN218497996 U CN 218497996U CN 202221946121 U CN202221946121 U CN 202221946121U CN 218497996 U CN218497996 U CN 218497996U
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- air conditioner
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Abstract
The utility model discloses an air conditioner and high tension switchgear self-locking circuit thereof. The circuit includes: the relay comprises a first relay, a second relay, a main contactor, a pressure switch and a controller; the controller at least comprises a starting signal output end; the pressure switch is arranged in an exhaust pipeline of a compressor of the air conditioner; the first relay comprises a first coil and a first normally closed contact; the second relay comprises a second coil, a second normally closed contact and a first normally open contact; the first normally closed contact is connected with the first normally open contact in parallel; the main contactor and the second normally closed contact are connected in series between the starting signal output end and the grounding end; wherein, the pressure switch is a fixed pressure disconnection type pressure switch. The utility model discloses a with pressure switch direct setting on compressor blast pipe in order to acquire the system pressure value, need not to set up system pressure and get the pressure pipe, avoid because getting the accuracy that the dirty stifled reason of pressure pipe influences pressure and acquires, the high-voltage switch that traditional air conditioner adopted relatively more has economic nature and reliability.
Description
Technical Field
The embodiment of the utility model provides an embodiment relates to the air conditioner field, especially relates to an air conditioner and high tension switchgear self-locking circuit thereof.
Background
In the prior art, when the screw air conditioner generates overhigh pressure, a high-pressure cut-off signal is output to the controller so as to control the compressor to stop working and prevent a system pipeline from bursting to cause danger.
In order to prevent the occurrence of the above situation, a central air-conditioning manufacturer usually adopts a high-voltage switch with a manual reset function, needs to lead pressure out of a system to the high-voltage switch, often sets a longer pressure tapping pipeline, and needs a self-locking mechanism and a manual reset mechanism, so that the cost is too high, and the pressure tapping pipeline of the connecting system often has a filth blockage phenomenon, so that a deviation exists to a certain extent when a pressure value is obtained.
In view of the above, it is necessary to improve a manual reset high-voltage switch in the prior art, and further design a high-voltage switch circuit with high economy and high reliability, which is a technical problem to be solved in the industry.
SUMMERY OF THE UTILITY MODEL
The utility model provides an air conditioner and high voltage switch self-locking circuit thereof to the realization more has the high voltage switch circuit of economic nature and reliability.
In a first aspect, an embodiment of the present invention provides a high voltage switch self-locking circuit of an air conditioner, including: the relay comprises a first relay, a second relay, a main contactor, a pressure switch and a controller;
the controller at least comprises a starting signal output end;
the pressure switch is arranged in a compressor exhaust pipeline of the air conditioner;
the first relay comprises a first coil and a first normally closed contact; the first coil and the pressure switch are connected in series between the positive pole end and the negative pole end of the mains supply;
the second relay comprises a second coil, a second normally closed contact and a first normally open contact; the first normally closed contact is connected with the first normally open contact in parallel; the second coil and the first normally closed contact are connected in series between the starting signal output end and a grounding end;
the main contactor and the second normally closed contact are connected in series between the starting signal output end and a grounding end;
wherein, the pressure switch is a fixed pressure disconnection type pressure switch.
Optionally, the controller further comprises a switch power supply terminal; the power supply end of the switch is electrically connected with the mains supply.
Optionally, the high-voltage switch self-locking circuit of air conditioner still includes: and the overcurrent protection circuit is electrically connected between the switch power end and the mains supply.
Optionally, the overcurrent protection circuit includes a fuse.
Optionally, the high-voltage switch self-locking circuit of air conditioner still includes: an alarm switch;
the controller also comprises an alarm signal input end; the alarm switch is electrically connected between the alarm signal input end and the alarm signal source.
Optionally, the first relay further includes a second normally open contact; and the second normally open contact is reused as the alarm switch.
Optionally, the controller further includes a power signal terminal;
and the power signal end is electrically connected with a power supply.
Optionally, the power supply is multiplexed as the alarm signal source.
Optionally, the controller is a programmable logic controller.
In a second aspect, the embodiment of the present invention further provides an air conditioner, which comprises the present invention, in any embodiment, a high voltage switch self-locking circuit of the air conditioner.
According to the technical scheme of the embodiment of the utility model, the pressure switch is arranged in the compressor exhaust pipeline of the air conditioner, the system high pressure of the compressor can be directly obtained on the compressor exhaust pipeline, and compared with the high-pressure switch with manual reset in the prior art, on one hand, the system pressure-taking pipe does not need to be arranged, and the cost of the pressure-taking pipe is saved; on the other hand, the problem that the pressure acquisition precision of the system is influenced due to the dirty blockage of the pressure acquisition pipeline is avoided, and high economical efficiency and reliability are realized. In addition, through setting up first normally closed contact and first normally open contact parallel connection in the circuit, second coil and first normally closed contact series connection are between start signal output and earthing terminal for when the system takes place unexpected pressure and risees, first normally open contact closure forms the auto-lock to the second relay, even system pressure recovery is normal, because the auto-lock of second relay makes second normally closed contact be in off-state always, has avoided the compressor to move again, has guaranteed that the trouble can obtain confirming.
Drawings
Fig. 1 is a schematic structural view of a high-voltage switch self-locking circuit of an air conditioner.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Example one
Fig. 1 is the utility model provides a pair of high tension switchgear self-locking circuit's of air conditioner structural schematic diagram, this embodiment is applicable to the condition that air condition compressor carries out the during operation, as shown in fig. 1, this air conditioner's high tension switchgear self-locking circuit 1 includes: a first relay 11, a second relay 12, a main contactor 13, a pressure switch 14, and a controller 15; the controller 15 includes at least an activation signal output 151; the pressure switch 14 is arranged in a compressor exhaust pipeline of the air conditioner; the first relay 11 includes a first coil 111 and a first normally closed contact 112; the first coil 111 and the pressure switch 14 are connected in series between the positive terminal and the negative terminal of the mains supply; the second relay 12 includes a second coil 121, a second normally closed contact 122, and a first normally open contact 123; the first normally closed contact 112 is connected in parallel with the first normally open contact 123; the second coil 121 and the first normally closed contact 112 are connected in series between the start signal output terminal 151 and the ground terminal; the main contactor 13 and the second normally closed contact 122 are connected in series between the start signal output terminal 151 and the ground terminal; the pressure switch 14 is a fixed pressure disconnection type pressure switch.
Specifically, the relay is an electric control device for converting a variation of a certain electric quantity into a switching quantity, and the first relay 11 and the second relay 12 in this embodiment include a coil itself and a normally closed/open contact, and the contact is closed or opened while the coil is powered on or powered off by using an electromagnetic principle, so as to achieve the purpose of turning on or off a circuit. The contactor is an electric appliance which uses an electromagnetic coil to generate a magnetic field by current flowing through the electromagnetic coil in industrial electricity to close a contact so as to control a load, and the main contactor 13 in the embodiment is mainly used for controlling the operation of a compressor, for example, when the contact of the main contactor 13 is opened, the compressor stops; the compressor starts running when the main contactor 13 contacts are closed. The start signal output 151 may be understood as an output terminal of the controller 15, that is, a start signal given after a series of logic operations of the controller 15, for controlling the output current.
In addition, the pressure switch 14 in this embodiment is a fixed pressure disconnection type pressure switch, which is disposed in the exhaust pipe of the compressor of the air conditioner, so as to directly obtain the system pressure value of the compressor on the exhaust pipe of the compressor, and the working principle is that when the system pressure in the compressor is higher than the rated safety pressure, the disc in the sensor of the pressure switch 14 instantaneously moves, the switch joint is pushed to be disconnected by the connecting guide rod, when the pressure is reduced to the rated recovery value, the disc in the sensor of the pressure switch 14 instantaneously resets, and at this time, the switch automatically resets. It should be noted that the type of air conditioner related to this embodiment may be understood as a central air conditioner, or may be a split air conditioner or a window air conditioner, and the present invention is not limited to the type of air conditioner.
Next, various cases existing during the operation of the air conditioner will be specifically described.
For example, referring to fig. 1, when the air conditioning system normally operates, when the controller 15 receives a start command, the start signal output terminal 151 of the controller 15 is powered to output, and the pressure switch 14 is in a closed state because the pressure in the compressor discharge duct detected by the pressure switch 14 is normal, and because the first coil 111 and the pressure switch are connected in series, the first coil 111 of the first relay 11 is powered at this time, and the first normally closed contact 112 in the corresponding circuit is opened; in addition, the second coil 121 connected in series with the first normally-closed contact 112 is disconnected due to the first normally-closed contact 112, so that the second coil 121 is de-energized, the second normally-closed contact 122 in the corresponding circuit is closed, and finally the contact of the main contactor 13 is closed, so as to ensure the normal operation of the compressor at this time.
When the pressure in the air conditioner compressor is higher than the rated safety pressure, a disc in the inductor in the pressure switch 14 pushes the switch joint to be disconnected, so that the normally closed point of the pressure switch 14 is in an open state, and based on the fact that the first coil 111 and the pressure switch are connected in series, the first coil 111 of the first relay 11 is powered off at the moment, and the first normally closed contact 112 in the corresponding circuit is closed; in addition, the second coil 121 connected in series with the first normally closed contact 112 is closed due to the first normally closed contact 112, so that the second coil 121 is electrified, the second normally closed contact 122 in the corresponding circuit is disconnected, further, the contact of the main contactor 13 connected in series with the second normally closed contact 122 is disconnected, and at the moment, the compressor is in a stop operation state, so that serious safety accidents caused by overhigh system pressure are avoided.
It should be noted that, in the actual working process of the air conditioner, some reasons may occur to cause the pressure value originally higher than the rated safe pressure in the compressor of the air conditioner to recover to be below the rated safe pressure, so that the pressure switch 14 is reset, the compressor operates again, and the cause of the fault cannot be confirmed, thereby having a great potential safety hazard.
In view of the above technical problems, the present embodiment further improves this, and designs a technical solution in which the first normally closed contact 112 of the first relay 11 is connected in parallel with the first normally open contact 123 of the second relay 12.
For example, with reference to fig. 1, when the first coil 111 of the first relay 11 loses power, because the first normally closed contact 112 is connected in parallel with the first normally open contact 123, while the first normally closed contact 112 in the corresponding circuit is closed, the first normally open contact 123 will be closed to form self-locking for the second relay 12, even if the pressure value in the compressor recovers below the rated safety pressure, so that the first coil 111 is powered on, the first normally closed contact 112 is disconnected, but because of the self-locking of the second relay 12, the second normally closed contact 122 of the second relay 12 will be always in an open state, so as to avoid the compressor from running again; until the start signal output terminal 151 is de-energized by a system shutdown command, the second coil 121 is de-energized, so that the second normally closed contact 122 is closed, and the compressor can be restarted, thereby ensuring that the fault is confirmed.
According to the technical scheme of the embodiment, the pressure switch is arranged in the compressor exhaust pipeline of the air conditioner, the system high pressure of the compressor can be directly obtained on the compressor exhaust pipeline, and compared with the high-pressure switch with manual reset in the prior art, on one hand, the system pressure obtaining pipe does not need to be arranged, and the cost of the pressure obtaining pipe is saved; on the other hand, the problem that the pressure acquisition precision of the system is influenced due to the dirty blockage of the pressure acquisition pipeline is avoided, and high economical efficiency and reliability are achieved. In addition, through setting up first normally closed contact and first normally open contact parallel connection in the circuit, second coil and first normally closed contact series connection are between start signal output and earthing terminal for when the system takes place unexpected pressure and risees, first normally open contact closure forms the auto-lock to the second relay, even system pressure recovery is normal, because the auto-lock of second relay makes second normally closed contact be in off-state always, has avoided the compressor to move again, has guaranteed that the trouble can obtain confirming.
Optionally, the controller 15 further comprises a switch power supply terminal 152; the switch power supply terminal 152 is electrically connected to the mains power supply.
Specifically, the switch power supply terminal 152 is a power switch of the output module in the controller 15, and is used for controlling the normal start of the compressor circuit. The commercial power supply is a commercial frequency alternating current power supply, and optionally, the rated voltage of the commercial power supply in this embodiment is 220V alternating current.
Optionally, the high voltage switch self-locking circuit of the air conditioner further comprises: and the overcurrent protection circuit is electrically connected between the switch power supply end 152 and the mains supply.
In particular, the overcurrent protection circuit can act to limit or break the current path for current flow when the current flow exceeds a predetermined maximum value. Illustratively, an overcurrent protection circuit is connected in series between the switch power supply terminal 152 and the mains supply, and when the current flowing through the line is too large, the overcurrent protection circuit will cut off the line between the switch power supply terminal 152 and the mains supply, so that the circuit breaker trips or gives an alarm signal, thereby preventing the devices in the circuit from being damaged.
Optionally, the over-current protection circuit includes a fuse 16. The fuse 16 may be composed of a fuse element and a fuse tube, and when the current flowing through the fuse element exceeds a certain value, the fuse element will be blown out, so that the circuit between the switch power supply end 152 and the commercial power supply is disconnected.
For example, in the present embodiment, a fuse 16 is connected in series between the switching power supply end 152 and the mains power supply, and in the series circuit, when the current exceeds the rated value, the fuse generates heat to melt the fuse, so as to break the current path and achieve the effect of protecting the components in the circuit. Optionally, the rated protection current of the fuse 16 may be 1A, and the present embodiment does not specifically limit the value of the rated protection current of the fuse 16.
Optionally, the high-voltage switch self-locking circuit of the air conditioner further includes: an alarm switch; controller 15 also includes an alarm signal input 153; the alarm switch is electrically connected between the alarm signal input end 153 and the alarm signal source.
For example, referring to fig. 1, an alarm signal input end 153 is provided in the controller 15, and an alarm switch is connected in series between the alarm signal input end 153 and an alarm signal source, so that when the pressure in the air conditioner compressor is too high, the controller 15 can send out an alarm signal to remind a worker to confirm and overhaul the fault.
Optionally, the first relay 11 further includes a second normally open contact 113; the second normally open contact 113 is multiplexed as an alarm switch.
Illustratively, with continued reference to fig. 1, by multiplexing the second normally open contact 113 as an alarm switch, when the air conditioning system is operating normally, the pressure switch 14 is in a closed state, and at this time, the first coil 111 of the first relay 11 is powered on, so that the corresponding second normally open contact 113 is closed, and at this time, the system detects that the line is normal and does not send an alarm signal; when the pressure in the air conditioner compressor is higher than the rated safety pressure, the pressure switch 14 is in a disconnected state, the first coil 111 of the first relay 11 is powered off, the corresponding second normally open contact 113 is disconnected, and the system detects that the line cannot be conducted and then sends an alarm signal to remind workers to confirm and overhaul the fault.
Optionally, the controller 15 further comprises a power signal terminal 154; the power signal terminal 154 is electrically connected to a power supply.
Specifically, the controller 15 is provided with a power signal terminal 154 connected to a power supply for providing a rated voltage to the controller 15, so that the controller 15 operates normally. It is understood that the power supply of this embodiment is rated for 24V dc.
Wherein, power supply can multiplex as the alarm signal source to this under the prerequisite of the alarm device normal operating in guaranteeing controller 15, can reduce the quantity of the signal source that provides to controller 15, simplify the interconnecting link of controller 15 and external signal source, and then simplify the high-voltage switch self-locking circuit's of air conditioner structure, be favorable to reducing the high-voltage switch self-locking circuit's of air conditioner cost.
Optionally, the controller 15 is a programmable logic controller.
The controller 15 is a programmable logic controller, and can store operation instructions such as executing logic operation in the programmable logic controller, control the operation of the air conditioner compressor in a digital input and output mode, and control an alarm device therein to give an alarm when detecting that the pressure in the compressor is abnormal.
Based on same design, the embodiment of the utility model provides a still provide an air conditioner, include the utility model discloses the high tension switchgear self-locking circuit of the air conditioner that arbitrary embodiment provided. Therefore, the utility model provides an air conditioner can include the utility model discloses the technical characteristic of the high tension switchgear self-locking circuit of air conditioner that provides can reach the utility model discloses the beneficial effect of the high tension switchgear self-locking circuit of air conditioner that provides, the same part can refer to the superposition right the utility model provides a description of the high tension switchgear self-locking circuit of air conditioner, no longer give unnecessary details here.
It should be noted that the foregoing is only a preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious modifications, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail with reference to the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the scope of the present invention.
Claims (10)
1. A high-voltage switch self-locking circuit of an air conditioner is characterized by comprising: the system comprises a first relay, a second relay, a main contactor, a pressure switch and a controller;
the controller at least comprises a starting signal output end;
the pressure switch is arranged in a compressor exhaust pipeline of the air conditioner;
the first relay comprises a first coil and a first normally closed contact; the first coil and the pressure switch are connected in series between the positive pole end and the negative pole end of the mains supply;
the second relay comprises a second coil, a second normally closed contact and a first normally open contact; the first normally closed contact is connected with the first normally open contact in parallel; the second coil and the first normally closed contact are connected in series between the starting signal output end and a grounding end;
the main contactor and the second normally closed contact are connected in series between the starting signal output end and a grounding end;
wherein, the pressure switch is a fixed pressure disconnection type pressure switch.
2. The high voltage switch self-locking circuit of an air conditioner according to claim 1, wherein the controller further comprises a switch power supply terminal; and the power end of the switch is electrically connected with the mains supply.
3. The high voltage switch self-locking circuit of the air conditioner according to claim 2, further comprising: and the overcurrent protection circuit is electrically connected between the power end of the switch and the mains supply.
4. The high voltage switch self-locking circuit of an air conditioner according to claim 3, wherein the overcurrent protection circuit comprises a fuse.
5. The high voltage switch self-locking circuit of an air conditioner according to claim 1, further comprising: an alarm switch;
the controller also comprises an alarm signal input end; the alarm switch is electrically connected between the alarm signal input end and the alarm signal source.
6. The high voltage switch latching circuit of an air conditioner according to claim 5, wherein the first relay further comprises a second normally open contact; and the second normally open contact is reused as the alarm switch.
7. The self-locking circuit for the high-voltage switch of the air conditioner as claimed in claim 5, wherein the controller further comprises a power signal terminal;
and the power signal end is electrically connected with a power supply.
8. The high-voltage switch self-locking circuit of the air conditioner as claimed in claim 7, wherein the power supply is multiplexed as the alarm signal source.
9. The high voltage switch self-locking circuit of an air conditioner according to claim 1, wherein the controller is a programmable logic controller.
10. An air conditioner, comprising: the high voltage switch self-locking circuit of the air conditioner as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221946121.1U CN218497996U (en) | 2022-07-25 | 2022-07-25 | Air conditioner and high-voltage switch self-locking circuit thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221946121.1U CN218497996U (en) | 2022-07-25 | 2022-07-25 | Air conditioner and high-voltage switch self-locking circuit thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218497996U true CN218497996U (en) | 2023-02-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221946121.1U Active CN218497996U (en) | 2022-07-25 | 2022-07-25 | Air conditioner and high-voltage switch self-locking circuit thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218497996U (en) |
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2022
- 2022-07-25 CN CN202221946121.1U patent/CN218497996U/en active Active
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