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Control method and system for preventing damage of compressor

A control method and compressor technology, which is applied in pump control, mechanical equipment, machine/engine, etc., can solve problems such as burning, compressor damage, and compressor failure to stop working, so as to avoid damage or burning and improve fault tolerance. Effect

Inactive Publication Date: 2018-04-03
YANTAI EBARA AIR CONDITIONER
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, these two methods will cause the compressor to fail to stop working after the PLC sends a stop command when the PLC is damaged or the contacts of the contactor are stuck or some wiring errors, and finally cause the compressor to be damaged or burned.

Method used

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  • Control method and system for preventing damage of compressor
  • Control method and system for preventing damage of compressor
  • Control method and system for preventing damage of compressor

Examples

Experimental program
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Effect test

Embodiment 1

[0048] Please refer to the attached image 3 , image 3 It is a schematic flowchart of a control method for preventing compressor damage provided by Embodiment 1 of the present invention. Such as image 3 As shown, the embodiment of the present invention discloses a control method for preventing compressor damage, which is applied to the compressor control circuit, the compressor control circuit controls the compressor starting device, and the digital switch of the compressor control circuit adopts double contacts, increasing The second contact of the second contact is connected in series with the contact of the start-up relay, and is connected in series with the contact of the start-up relay to control the emergency stop contact of the compressor control circuit for emergency stop. The control method includes:

[0049] S301. Receive a control command from the PLC output control terminal, and control the action of the start-up relay through the double contacts according to t...

Embodiment 2

[0054] Please refer to the attached Figure 4 , Figure 4 It is a schematic flowchart of a control method for preventing compressor damage provided by Embodiment 2 of the present invention. Such as Figure 4 As shown, the embodiment of the present invention discloses a control method for preventing compressor damage, which is applied to the compressor control circuit, the compressor control circuit controls the compressor starting device, and the digital switch of the compressor control circuit adopts double contacts, increasing The second contact of the switch is connected in series with the contacts of the start-up relay and the circuit breaker release is connected in series with the PLC output control terminal and the power supply terminal, which is connected in series with the contacts of the start-up relay to control the emergency stop contacts of the compressor control circuit for emergency stop. The compressor control circuit also includes: a circuit breaker release c...

Embodiment 3

[0063] Please refer to the attached Figure 5 , Figure 5 It is a schematic flowchart of a control method for preventing compressor damage provided by Embodiment 3 of the present invention. Such as Figure 5 As shown, the embodiment of the present invention discloses a control method for preventing damage to the compressor, which is applied to the compressor control circuit. The compressor control circuit controls the compressor starting device. The second contact of the second contact is connected in series with the contact of the start-up relay, is connected in series with the contact of the start-up relay, controls the emergency stop contact of the emergency stop of the compressor control circuit, and the compressor control circuit also includes: connected in series with the PLC output control terminal and A circuit breaker trip unit between the power terminals, the control method includes:

[0064] S501. Receive a control command from the PLC output control terminal, an...

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Abstract

The invention discloses a control method and system for preventing damage of a compressor. According to the control method, a digital quantity switch signal at the output control end of a PLC adopts double contacts to guarantee the operation of a start-up relay so that the fault tolerance rate can be improved, the second contact additionally arranged is connected to the contact of the start-up relay in series, and an emergency stop contact is additionally arranged in a compressor control circuit; the problem that the fault tolerance rate is low can be well solved by the second contact additionally arranged, namely, the digital quantity switch of the PLC adopts the double contacts, meanwhile, the contact end of the start-up relay also adopts the double contacts, so that the hardware cost isnot required to be increased, when the relay is damaged or the contacts of a contactor are stuck in the circuit, the control circuit of the compressor can be effectively disconnected by adopting thedouble contacts, and the compressor can effectively stop working so that the compressor can be prevented from being damaged or burnt; and in addition, the emergency stop contact additionally arrangedin the compressor control circuit can be used by a worker for emergency outage.

Description

technical field [0001] The invention relates to the technical field of compressor control and protection, in particular to a control method and system for preventing compressor damage. Background technique [0002] Under normal circumstances, the probability of compressor damage is relatively low. Currently, the temperature of the compressor coil is monitored by PLC (Programmable Logic Controller). If the temperature reaches the preset temperature value, the PLC will issue a stop command to control the compressor. Stop working, this method can only prevent damage to the equipment when other hardware designs and hardware itself and wiring are normal, but the protection of the compressor cannot be achieved in the case of contact adhesion or wrong wiring, once a failure occurs would cause serious damage. [0003] At present, the compressor control is the action part of the final program in the electrical circuit. If some relays are damaged or contactor contacts are stuck, the ...

Claims

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Application Information

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IPC IPC(8): F04B49/06F04B51/00
CPCF04B49/065F04B51/00
Inventor 孙晓明黄金龙崔玉刚王玺联时治青
Owner YANTAI EBARA AIR CONDITIONER
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