CN215490040U - Switching circuit of air conditioner host and standby machine and air conditioner - Google Patents
Switching circuit of air conditioner host and standby machine and air conditioner Download PDFInfo
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- CN215490040U CN215490040U CN202121752419.4U CN202121752419U CN215490040U CN 215490040 U CN215490040 U CN 215490040U CN 202121752419 U CN202121752419 U CN 202121752419U CN 215490040 U CN215490040 U CN 215490040U
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Abstract
The utility model discloses a switching circuit of a main machine and a standby machine of an air conditioner and the air conditioner, comprising: the host control board is provided with a first fault output end and a first state detection end and is used for sending a first fault signal to the fault detection module from the first fault output end after the host is in fault shutdown; the standby machine control board is provided with a second fault output end and a second state detection end and is used for starting the standby machine when the second state detection end receives a second input signal; the fault detection module is used for outputting a second input signal to the second state detection end when receiving the first fault signal so as to start the standby machine; the fault detection module is respectively connected with the first fault output end and the second state detection end, so that the switching between the air conditioner host and the standby machine can be carried out under the condition of not using a centralized control system, the switching cost is reduced, and the reliability of the air conditioner is improved.
Description
Technical Field
The present disclosure relates to the field of air conditioners, and more particularly, to a switching circuit for a main unit and a standby unit of an air conditioner and an air conditioner.
Background
In a scene requiring long-term operation of the air conditioner, the stable operation of the air conditioner can ensure the reliable operation of equipment in the scene. Once the air conditioner fails, the equipment in the scene is damaged, and further loss is caused. Therefore, a scheme of the host and the standby machine is generally adopted, for example, the host a runs for a long time, the standby machine B is started to work alternately after the host a fails, and a centralized control system is generally used in the industry to detect the failure and switch the host/standby machines, but the centralized control system has higher cost and is not suitable for all enterprises and scenes.
Therefore, how to avoid switching between the main unit and the standby unit of the air conditioner by using a centralized control system and reduce the switching cost is a technical problem to be solved at present.
SUMMERY OF THE UTILITY MODEL
The utility model provides a switching circuit of a main machine and a standby machine of an air conditioner, which is used for solving the technical problem of high switching cost of the main machine and the standby machine of the air conditioner in the prior art.
The circuit includes:
the host control board is provided with a first fault output end used for outputting a first fault signal and a first state detection end used for accessing a first input signal, and the host control board is used for sending the first fault signal to the fault detection module from the first fault output end after the host is in fault shutdown;
the standby machine control board is provided with a second fault output end for outputting a second fault signal and a second state detection end for accessing a second input signal, and the standby machine control board is used for starting the standby machine when the second state detection end receives the second input signal;
the fault detection module is used for outputting the second input signal to the second state detection end when the first fault signal is received so as to start the standby machine;
the fault detection module is respectively connected with the first fault output end and the second state detection end.
In some embodiments of the present application, the first fault output terminal and the second fault output terminal respectively include two ports, and the first state detection terminal and the second state detection terminal respectively include three ports.
In some embodiments of the present application, the fault detection module comprises:
a relay that closes when the first fault signal is received and opens when the first fault signal is not received;
the first end of the coil of the relay is connected with the first port of the first fault output end, the second end of the coil of the relay is connected with the second port of the first fault output end, the first end of the switch of the relay is connected with the first port of the second state detection end, and the second end of the switch of the relay is connected with the second port of the second state detection end.
In some embodiments of the present application, the second port and the third port of the first status detection terminal are shorted, and the second port and the third port of the second status detection terminal are shorted.
In some embodiments of the present application, the circuit further comprises:
and the fault alarm module is used for receiving the first fault signal from the first fault port and sending out a first fault alarm signal after the main machine is in fault shutdown, and receiving the second fault signal from the second fault port and sending out a second fault alarm signal after the standby machine is in fault shutdown.
In some embodiments of the present application, a first end of the fault alarm module is connected to a first port of the first fault port and a second port of the second fault port, respectively, and a second end of the fault alarm module is connected to a second port of the first fault port and a first port of the second fault port, respectively.
In some embodiments of the present application, a preset time is delayed after the first state detection terminal loses the first input signal to stop the host and not respond to the power-on command, and the preset time is delayed when the second state detection terminal loses the second input signal to stop the standby power-on command and not respond to the power-on command.
In some embodiments of the present application, the preset time period is 3 s.
In some embodiments of the present application, the first fault signal and the second fault signal are 12V voltage signals.
Correspondingly, the utility model also provides an air conditioner, which comprises a main machine and a standby machine, wherein the main machine and the standby machine respectively comprise:
a refrigerant circulation loop, which circulates the refrigerant in a loop composed of a compressor, a condenser, an expansion valve, an evaporator and a four-way valve;
the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser;
an outdoor heat exchanger and an indoor heat exchanger, wherein one of the heat exchangers operates as a condenser and the other operates as an evaporator;
the four-way valve is used for controlling the flow direction of the refrigerant in the refrigerant loop so as to switch the outdoor heat exchanger and the indoor heat exchanger between the condenser and the evaporator;
the air conditioner also comprises the switching circuit of the air conditioner main machine and the standby machine.
Through applying above technical scheme, the switching circuit of air conditioner host computer and standby machine includes: the host control board is provided with a first fault output end for outputting a first fault signal and a first state detection end for accessing the first input signal, and is used for sending the first fault signal to the fault detection module from the first fault output end after the host is in fault shutdown; the standby machine control board is provided with a second fault output end for outputting a second fault signal and a second state detection end for accessing a second input signal, and the standby machine control board is used for starting the standby machine when the second state detection end receives the second input signal; the fault detection module is used for outputting a second input signal to the second state detection end when receiving the first fault signal so as to start the standby machine; the fault detection module is respectively connected with the first fault output end and the second state detection end, so that the switching between the air conditioner host and the standby machine can be carried out under the condition of not using a centralized control system, the switching cost is reduced, and the reliability of the air conditioner is improved.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram illustrating a switching circuit between a main unit and a standby unit of an air conditioner according to an embodiment of the present invention;
fig. 2 is a schematic control flow diagram illustrating switching between the air conditioner main unit and the standby unit according to the embodiment of the present invention.
In fig. 1, 10, a host control board; 110. a first fault output; 120. a first state detection terminal; 20. a standby machine control panel; 210. a second fault output; 220. a second state detection terminal; 30. a fault detection module; 40. and a fault alarm module.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless otherwise specified.
In the description of the present application, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.
The air conditioner performs a refrigeration cycle of the air conditioner by using a compressor, a condenser, an expansion valve, and an evaporator. The refrigeration cycle includes a series of processes involving compression, condensation, expansion, and evaporation, and supplies refrigerant to the air that has been conditioned and heat-exchanged.
The compressor compresses a refrigerant gas in a high-temperature and high-pressure state and discharges the compressed refrigerant gas. The discharged refrigerant gas flows into the condenser. The condenser condenses the compressed refrigerant into a liquid phase, and heat is released to the surrounding environment through the condensation process.
The expansion valve expands the liquid-phase refrigerant in a high-temperature and high-pressure state condensed in the condenser into a low-pressure liquid-phase refrigerant. The evaporator evaporates the refrigerant expanded in the expansion valve and returns the refrigerant gas in a low-temperature and low-pressure state to the compressor. The evaporator can achieve a cooling effect by heat-exchanging with a material to be cooled using latent heat of evaporation of a refrigerant. The air conditioner can adjust the temperature of the indoor space throughout the cycle.
The outdoor unit of the air conditioner refers to a portion of a refrigeration cycle including a compressor and an outdoor heat exchanger, the indoor unit of the air conditioner includes an indoor heat exchanger, and an expansion valve may be provided in the indoor unit or the outdoor unit.
The indoor heat exchanger and the outdoor heat exchanger serve as a condenser or an evaporator. When the indoor heat exchanger is used as a condenser, the air conditioner is used as a heater in a heating mode, and when the indoor heat exchanger is used as an evaporator, the air conditioner is used as a cooler in a cooling mode.
The embodiment of the application provides a switching circuit of a main machine and a standby machine of an air conditioner, as shown in fig. 1, the switching circuit comprises:
the host control board 10 is provided with a first fault output end 110 for outputting a first fault signal and a first state detection end 120 for accessing the first input signal, and the host control board 10 is used for sending the first fault signal from the first fault output end 110 to the fault detection module 30 after the host is in fault shutdown;
the standby machine control board 20 is provided with a second fault output end 210 for outputting a second fault signal and a second state detection end 220 for accessing a second input signal, and the standby machine control board 20 is used for starting the standby machine when the second state detection end 220 receives the second input signal;
the fault detection module 30 is configured to output a second input signal to the second state detection terminal 220 when receiving the first fault signal, so as to start the standby machine;
the fault detection module 30 is connected to the first fault output terminal 110 and the second status detection terminal 220, respectively.
In this embodiment, the air conditioner includes a host and a standby machine, the host control panel 10 is disposed in the host, the standby control panel 20 is disposed in the standby machine, and the standby machine is in a standby state when the host operates normally; and after the host fails and stops running, the standby machine is started.
Alternatively, the main machine control panel 10 is provided in the indoor unit of the main machine, and the standby machine control panel 20 is provided in the indoor unit of the standby machine. The first fail output terminal 110 does not output the first fail signal when the main machine is normally operated, and the second fail output terminal 210 does not output the second fail signal when the standby machine is normally operated.
In order to improve the reliability of the circuit, in some embodiments of the present invention, as shown in fig. 1, the first fail output terminal 110 and the second fail output terminal 210 respectively include two ports (port 1 and port 2), and the first state detection terminal 120 and the second state detection terminal 220 respectively include three ports (port 1, port 2 and port 3).
To improve the reliability of the circuit, in some embodiments of the present application, as shown in fig. 1, the fault detection module 30 includes:
the relay is closed when receiving the first fault signal and is disconnected when not receiving the first fault signal;
a first end of a coil of the relay is connected to the first port of the first fault output terminal 110, a second end of the coil of the relay is connected to the second port of the first fault output terminal 110, a first end of a switch of the relay is connected to the first port of the second state detection terminal 220, and a second end of the switch of the relay is connected to the second port of the second state detection terminal 220.
In order to improve the reliability of the circuit, in some embodiments of the present application, the second port and the third port of the first state detection terminal 120 are shorted, and the second port and the third port of the second state detection terminal 220 are shorted. As shown in fig. 1, the ports 2 and 3 of the first state detection terminal 120 and the second state detection terminal 220 are shorted.
In order to notify the maintenance personnel in time when the main machine or the standby machine is out of operation due to a fault, in some embodiments of the present application, as shown in fig. 1, the circuit further includes:
and the fault alarm module 40 is used for receiving a first fault signal from the first fault port and sending out the first fault alarm signal after the main machine is in fault shutdown, and receiving a second fault signal from the second fault port and sending out the second fault alarm signal after the standby machine is in fault shutdown.
In order to improve the reliability of the circuit, in some embodiments of the present application, as shown in fig. 1, a first end of the fault alarm module 40 is connected to a first port of the first fault port and a second port of the second fault port, respectively, and a second end of the fault alarm module 40 is connected to a second port of the first fault port and a first port of the second fault port, respectively.
In order to improve the reliability of the circuit, in some embodiments of the present invention, the first state detecting terminal 120 delays for a predetermined time after losing the first input signal to disable the host and not respond to the power-on command, and the second state detecting terminal 220 delays for a predetermined time when losing the second input signal to disable the standby and not respond to the power-on command.
In this embodiment, the non-response to the power-on instruction means that the indoor unit cannot be powered on, and if the user performs a power-on operation, the line controller does not respond, and the line controller displays a power-off state.
After the host machine is recovered from the fault shutdown to the normal operation, the fault detection module 30 is disconnected, the second state detection end 220 loses the second input signal, the preset time length is delayed to enable the standby machine to be shutdown and not respond to the startup instruction, and at the moment, a maintenance worker can reset the standby machine or set the standby machine to be automatically reset in a delayed mode to recover the standby state of the standby machine.
In order to improve the reliability of the circuit, in some embodiments of the present application, the preset time period is 3 s.
To improve the reliability of the circuit, in some embodiments of the present application, the first fault signal and the second fault signal are 12V voltage signals.
Through applying above technical scheme, the switching circuit of air conditioner host computer and standby machine includes: the host control board is provided with a first fault output end for outputting a first fault signal and a first state detection end for accessing the first input signal, and is used for sending the first fault signal to the fault detection module from the first fault output end after the host is in fault shutdown; the standby machine control board is provided with a second fault output end for outputting a second fault signal and a second state detection end for accessing a second input signal, and the standby machine control board is used for starting the standby machine when the second state detection end receives the second input signal; the fault detection module is used for outputting a second input signal to the second state detection end when receiving the first fault signal so as to start the standby machine; the fault detection module is respectively connected with the first fault output end and the second state detection end, so that the switching between the air conditioner host and the standby machine can be carried out under the condition of not using a centralized control system, the switching cost is reduced, and the reliability of the air conditioner is improved.
In order to further illustrate the technical idea of the present invention, the technical solution of the present invention will now be described with reference to specific application scenarios.
In this embodiment of the application, the air conditioner includes a host a and a standby B, and further includes the above-mentioned switching circuit of the host and the standby, as shown in fig. 2, the control flow of switching between the host a and the standby B includes:
1. when the host A works, the first fault output end has no signal output, the switch of the relay is in a default off state, and the second state detection end of the standby machine B has no signal input, cannot work and is in a standby state.
2. When the host A has a fault, the host A stops working, the first fault output end outputs a 12V voltage signal, and a fault alarm is set out. Meanwhile, the relay receives a 12V voltage signal, the switch is switched off to be closed, and the second state detection end of the standby machine B is started to work after receiving a second input signal.
3. And when the failure of the host A is recovered, restarting the normal operation.
At the moment, the relay is switched off, the second state detection end of the standby machine B loses the second input signal, the standby machine B stops running, and the standby machine B automatically enters a standby state.
4. If the standby machine B fails, the second failure output end outputs a 12V voltage signal, and a failure alarm is given out to remind maintenance personnel to maintain in time.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit the same; although the present application has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not necessarily depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.
Claims (10)
1. A switching circuit of a main machine and a standby machine of an air conditioner is characterized by comprising the following components:
the host control board is provided with a first fault output end used for outputting a first fault signal and a first state detection end used for accessing a first input signal, and the host control board is used for sending the first fault signal to the fault detection module from the first fault output end after the host is in fault shutdown;
the standby machine control board is provided with a second fault output end for outputting a second fault signal and a second state detection end for accessing a second input signal, and the standby machine control board is used for starting the standby machine when the second state detection end receives the second input signal;
the fault detection module is used for outputting the second input signal to the second state detection end when the first fault signal is received so as to start the standby machine;
the fault detection module is respectively connected with the first fault output end and the second state detection end.
2. The circuit of claim 1, wherein the first fail output terminal and the second fail output terminal each include two ports, and the first state detection terminal and the second state detection terminal each include three ports.
3. The circuit of claim 2, wherein the fault detection module comprises:
a relay that closes when the first fault signal is received and opens when the first fault signal is not received;
the first end of the coil of the relay is connected with the first port of the first fault output end, the second end of the coil of the relay is connected with the second port of the first fault output end, the first end of the switch of the relay is connected with the first port of the second state detection end, and the second end of the switch of the relay is connected with the second port of the second state detection end.
4. The circuit of claim 2, wherein the second port and the third port of the first state detection terminal are shorted, and the second port and the third port of the second state detection terminal are shorted.
5. The circuit of claim 2, wherein the circuit further comprises:
and the fault alarm module is used for receiving the first fault signal from the first fault port and sending out a first fault alarm signal after the main machine is in fault shutdown, and receiving the second fault signal from the second fault port and sending out a second fault alarm signal after the standby machine is in fault shutdown.
6. The circuit of claim 5, wherein a first end of the fault alarm module is connected to a first port of the first failed port and a second port of the second failed port, respectively, and a second end of the fault alarm module is connected to a second port of the first failed port and a first port of the second failed port, respectively.
7. The circuit of claim 1, wherein delaying the first input signal at the first state detection terminal for a predetermined time period causes the host to shut down and not respond to a power-on command, and delaying the second input signal at the second state detection terminal for the predetermined time period causes the standby to shut down and not respond to a power-on command.
8. The circuit of claim 7, wherein the preset duration is 3 s.
9. The circuit of any of claims 1-8, wherein the first fault signal and the second fault signal are 12V voltage signals.
10. An air conditioner comprising a main unit and a backup unit, the main unit and the backup unit respectively comprising:
a refrigerant circulation loop, which circulates the refrigerant in a loop composed of a compressor, a condenser, an expansion valve, an evaporator and a four-way valve;
the compressor is used for compressing low-temperature and low-pressure refrigerant gas into high-temperature and high-pressure refrigerant gas and discharging the high-temperature and high-pressure refrigerant gas to the condenser;
an outdoor heat exchanger and an indoor heat exchanger, wherein one of the heat exchangers operates as a condenser and the other operates as an evaporator;
the four-way valve is used for controlling the flow direction of the refrigerant in the refrigerant loop so as to switch the outdoor heat exchanger and the indoor heat exchanger between the condenser and the evaporator;
characterized in that the air conditioner also comprises a switching circuit of the main machine and the standby machine of the air conditioner according to any one of claims 1 to 9.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202121752419.4U CN215490040U (en) | 2021-07-29 | 2021-07-29 | Switching circuit of air conditioner host and standby machine and air conditioner |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202121752419.4U CN215490040U (en) | 2021-07-29 | 2021-07-29 | Switching circuit of air conditioner host and standby machine and air conditioner |
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| CN215490040U true CN215490040U (en) | 2022-01-11 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115200157A (en) * | 2022-06-06 | 2022-10-18 | 珠海格力电器股份有限公司 | Unit, unit wheel circulation control system and method and air conditioning unit |
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- 2021-07-29 CN CN202121752419.4U patent/CN215490040U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115200157A (en) * | 2022-06-06 | 2022-10-18 | 珠海格力电器股份有限公司 | Unit, unit wheel circulation control system and method and air conditioning unit |
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