CN212155978U - Electric air valve control system of double-speed air exhauster of refrigeration machine room - Google Patents
Electric air valve control system of double-speed air exhauster of refrigeration machine room Download PDFInfo
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- CN212155978U CN212155978U CN202020545875.0U CN202020545875U CN212155978U CN 212155978 U CN212155978 U CN 212155978U CN 202020545875 U CN202020545875 U CN 202020545875U CN 212155978 U CN212155978 U CN 212155978U
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Abstract
The utility model discloses a control system of an electric air valve of a double-speed exhaust fan of a refrigerating room, which comprises a pole-changing double-speed fan, a low-speed electric air valve and a high-speed electric air valve; the built-in opening position switch of the low-speed electric air valve is connected with an alternating current power supply live wire through a normally-open contact of a contactor QC1, and the built-in closing position switch of the low-speed electric air valve is connected with the alternating current power supply live wire through a normally-closed contact of a contactor QC 1; the built-in opening position switch of the high-speed electric air valve is connected with an alternating current power supply live wire through a normally open contact of a high-speed contactor QC2, and the built-in closing position switch of the high-speed electric air valve is connected with the alternating current power supply live wire through a normally closed contact of a high-speed contactor QC 2; the common ends of the low-speed electric air valve and the high-speed electric air valve are directly connected with the zero line of the alternating current power supply. The utility model discloses utilize low-speed contactor QC1 and high speed contactor QC2 normally open, normally closed contact to control the chain control of low-speed, high-speed electronic blast gate and change utmost point double speed fan, solved change utmost point double speed fan D and low, the interlocking insecure drawback of high-speed electronic blast gate.
Description
Technical Field
The utility model relates to a refrigeration computer lab exhaust system especially relates to refrigeration computer lab double speed air exhauster motor-driven damper control system.
Background
The refrigeration machine room is universally existed in modern large and medium-sized buildings, is mostly located in basements of the buildings, is a core machine room of air conditioning equipment of various large and medium-sized buildings, and plays a vital role in normal operation of the buildings, particularly in winter and summer. The electric refrigerating unit of the refrigerating machine room needs to use a refrigerant for circulating refrigeration, leakage is possible to occur in the using process, and the air quality of the refrigerating machine room is reduced after leakage, so that the body of an operator on duty or patrolling is damaged; secondly, the electric refrigerating unit cannot work normally and needs to give an alarm in time after the refrigerant leaks and carry out accident air exhaust; therefore, the refrigeration machine room is required to meet not only the requirement of usual ventilation but also the requirement of accident ventilation.
Because the air exhaust volume of the air exhaust of the refrigeration machine room at ordinary times is different from the air exhaust volume of the accident air exhaust when the refrigerant leaks, the air exhaust fan of the refrigeration machine room usually adopts a pole-changing double-speed fan, meanwhile, the air exhaust at ordinary times is the upper air exhaust, the air port is at the top of the refrigeration machine room, the accident air exhaust is the lower air exhaust, and the air port is at the bottom of the refrigeration machine room. The branch air pipes for ordinary-time air exhaust and accident air exhaust are respectively provided with an electric air valve, so that when normal air is ventilated, the electric air valves of the ordinary-time ventilation branch air pipes (hereinafter referred to as low-speed electric air valves) are opened, and the electric air valves of the accident air exhaust branch air pipes (hereinafter referred to as high-speed electric air valves) are closed to carry out ordinary-time air exhaust; when a leakage accident occurs, the high-speed electric air valve is opened, and the low-speed electric air valve is closed to exhaust the air in the accident. At present, the control of a low-speed electric air valve and a high-speed electric air valve is mostly finished by a refrigerant leakage detector. When a leakage accident happens, the refrigerant leakage detector sends a control instruction to synchronously control the opening of the accident fan (the pole-changing double-speed fan runs at a high speed), the closing of the low-speed electric air valve and the opening of the high-speed electric air valve. However, when the refrigerant leakage detector issues a control command, if any one of the fault blower (the high-speed operation state of the pole-changing double-speed blower), the low-speed electric air valve or the high-speed electric air valve is not operated, the fault air discharge cannot be completed as required. Meanwhile, when the accident fan (the pole-changing double-speed fan in a high-speed running state) stops working, the low-speed electric air valve cannot be in a closed state, so that the indoor environment of the refrigerator room cannot be completely isolated from the air exhaust air shaft or the outdoor environment.
Disclosure of Invention
The utility model aims to provide a refrigeration computer lab double speed air exhauster motor-driven air valve control system that the reliability is high.
In order to achieve the above purpose, the utility model adopts the following technical proposal:
the utility model discloses a refrigeration machine room double-speed exhaust fan electric air valve control system, which comprises a pole-changing double-speed fan D, a low-speed electric air valve and a high-speed electric air valve; the low-speed power supply terminal and the high-speed power supply terminal of the pole-changing double-speed fan D are respectively connected with a low-voltage circuit breaker QA wire outlet end through a low-speed contactor QC1 and a high-speed contactor QC2, the low-voltage circuit breaker QA wire inlet end is connected with an alternating-current 380-volt power supply, and the pole-changing wiring terminal of the pole-changing double-speed fan D is connected through a star contactor QC 3; the built-in opening position switch K1.1 of the low-speed electric air valve is connected with an AC 220V power live wire through a normally open contact j11 of a low-speed contactor QC1, and the built-in closing position switch K1.2 of the low-speed electric air valve is connected with the AC 220V power live wire through a normally closed contact j12 of a low-speed contactor QC 1; the built-in opening position switch K2.1 of the high-speed electric air valve is connected with an AC 220V power live wire through a normally open contact j21 of a high-speed contactor QC2, and the built-in closing position switch K2.2 of the high-speed electric air valve is connected with the AC 220V power live wire through a normally closed contact j22 of a high-speed contactor QC 2; the common ends of the low-speed electric air valve and the high-speed electric air valve are directly connected with a zero line of an alternating current 220V power supply.
The utility model discloses utilize normally opening of low-speed contactor QC1 and high speed contactor QC2, the normally closed contact controls low-speed electric air valve, high-speed electric air valve and the chain control of change utmost point double speed fan D, change utmost point double speed fan D's low, high-speed operation and the low that corresponds, high-speed electric air valve synchronization action, thoroughly solved change utmost point double speed fan D with low, high-speed electric air valve is chain unreliable, asynchronous drawback, guaranteed to air exhaust at ordinary times and the reliable operation that the accident was aired exhaust, low when changing utmost point double speed fan D stop work, high-speed electric air valve all is in the closed condition, guarantee indoor environment and air exhaust air shaft or outdoor complete isolation, and do not increase any investment economically.
Drawings
Fig. 1 is a schematic diagram of a power circuit of the pole-changing double-speed fan D of the present invention.
Fig. 2 is a schematic circuit diagram of the electric air valve control system of the present invention.
Detailed Description
The following describes embodiments of the present invention in detail with reference to the drawings, which are implemented on the premise of the technical solution of the present invention, and detailed embodiments and specific operation procedures are provided, but the scope of the present invention is not limited to the following embodiments.
As shown in fig. 1 and 2, the dual-speed exhaust fan electric air valve control system of the refrigeration machine room of the present invention comprises a pole-changing dual-speed fan D, a low-speed electric air valve 1 and a high-speed electric air valve 2; the low-speed power supply terminal and the high-speed power supply terminal of the pole-changing double-speed fan D are respectively connected with a low-voltage circuit breaker QA outlet terminal through a low-speed contactor QC1 and a high-speed contactor QC2, the low-voltage circuit breaker QA inlet terminal is connected with an alternating-current 380-volt power supply, and the pole-changing connecting terminal 3 of the pole-changing double-speed fan D is connected through a star contactor QC 3; the built-in opening position switch K1.1 of the low-speed electric air valve 1 is connected with an AC 220V power live wire through a normally open contact j11 of a low-speed contactor QC1, and the built-in closing position switch K1.2 of the low-speed electric air valve 1 is connected with the AC 220V power live wire through a normally closed contact j12 of a low-speed contactor QC 1; the built-in opening position switch K2.1 of the high-speed electric air valve 2 is connected with an AC 220V power live wire through a normally open contact j21 of a high-speed contactor QC2, and the built-in closing position switch K2.2 of the high-speed electric air valve 2 is connected with the AC 220V power live wire through a normally closed contact j22 of a high-speed contactor QC 2; the common ends of the low-speed electric air valve 1 and the high-speed electric air valve 2 are directly connected with a zero line of an alternating current 220V power supply.
The utility model discloses the theory of operation is as follows briefly:
1. when the refrigeration machine room stops not exhausting air, the pole-changing double-speed fan D does not work; the contactors QC1, QC2 and QC3 are all located at open positions, normally closed contacts j12 and j22 of the contactors QC1 and QC2 are closed, normally open contacts j11 and j21 are opened, built-in closed position switches K1.2 and K2.2 of the low-speed electric air valve 1 and the high-speed electric air valve 2 are powered on, and the low-speed electric air valve 1 and the high-speed electric air valve 2 are all located at closed positions.
When the refrigeration machine room is normally ventilated, the contactor QC1 is closed, the contactor QC2 and the contactor QC3 are disconnected, and the normally closed contact of the contactor QC1 is disconnected j12 and the normally open contact j11 is closed; the contactor QC2 and the contactor QC3 are located at the opening positions, the normally closed contact j22 of the contactor QC2 is closed, the normally open contact j21 is opened, the low-speed electric air valve 1 is located at the opening position, the high-speed electric air valve 2 is located at the closing position, and the pole-changing double-speed fan D is in the low-speed running state to exhaust air to the refrigeration machine room.
2. Air exhaust in accident: and when detecting that the refrigerant leaks from the refrigeration machine room, performing accident air exhaust on the refrigeration machine room. At the moment, the contactor QC2 and the contactor QC3 are closed, and the contactor QC1 is opened; the QC2 normally closed contact j22 is opened, and the normally open contact j21 is closed; the contactor QC1 is in the open position, normally closed contact j12 is closed, normally open contact j11 is disconnected, low-speed electric air valve 1 is in the closed position and high-speed electric air valve 2 is in the open position, and the pole-changing double-speed fan D is in the high-speed running state and carries out accident air exhaust to the refrigeration machine room.
3. After the power-on action is completed, the coils of the actuating motors M1 and M2 of the low-speed electric air valve 1 and the high-speed electric air valve 2 are not electrified all the time, so that the purpose of saving electricity is achieved.
Claims (1)
1. The utility model provides a refrigeration room two speed exhaust fan electric air valve control system which characterized in that: comprises a pole-changing double-speed fan D, a low-speed electric air valve (1) and a high-speed electric air valve (2); the low-speed power supply terminal and the high-speed power supply terminal of the pole-changing double-speed fan D are respectively connected with a low-voltage circuit breaker QA outlet terminal through a low-speed contactor QC1 and a high-speed contactor QC2, the low-voltage circuit breaker QA inlet terminal is connected with an alternating-current 380-volt power supply, and a pole-changing connecting terminal (3) of the pole-changing double-speed fan D is connected through a star contactor QC 3; the built-in opening position switch K1.1 of the low-speed electric air valve (1) is connected with an AC 220V power live wire through a normally open contact j11 of a low-speed contactor QC1, and the built-in closing position switch K1.2 of the low-speed electric air valve (1) is connected with the AC 220V power live wire through a normally closed contact j12 of a low-speed contactor QC 1; the built-in opening position switch K2.1 of the high-speed electric air valve (2) is connected with a live wire of an alternating-current 220-volt power supply through a normally-open contact j21 of a high-speed contactor QC2, and the built-in closing position switch K2.2 of the high-speed electric air valve (2) is connected with the live wire of the alternating-current 220-volt power supply through a normally-closed contact j22 of a high-speed contactor QC 2; the common ends of the low-speed electric air valve (1) and the high-speed electric air valve (2) are directly connected with a zero line of an alternating current 220V power supply.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020545875.0U CN212155978U (en) | 2020-04-14 | 2020-04-14 | Electric air valve control system of double-speed air exhauster of refrigeration machine room |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020545875.0U CN212155978U (en) | 2020-04-14 | 2020-04-14 | Electric air valve control system of double-speed air exhauster of refrigeration machine room |
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| CN212155978U true CN212155978U (en) | 2020-12-15 |
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| CN202020545875.0U Active CN212155978U (en) | 2020-04-14 | 2020-04-14 | Electric air valve control system of double-speed air exhauster of refrigeration machine room |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017511A (en) * | 2021-10-13 | 2022-02-08 | 北京市水利规划设计研究院 | Air valve and fan interlocking control system |
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2020
- 2020-04-14 CN CN202020545875.0U patent/CN212155978U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114017511A (en) * | 2021-10-13 | 2022-02-08 | 北京市水利规划设计研究院 | Air valve and fan interlocking control system |
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