CN209877281U - Low-temperature anti-freezing protection device for fresh air cabinet - Google Patents
Low-temperature anti-freezing protection device for fresh air cabinet Download PDFInfo
- Publication number
- CN209877281U CN209877281U CN201920506767.XU CN201920506767U CN209877281U CN 209877281 U CN209877281 U CN 209877281U CN 201920506767 U CN201920506767 U CN 201920506767U CN 209877281 U CN209877281 U CN 209877281U
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- CN
- China
- Prior art keywords
- temperature
- fresh air
- air cabinet
- electrically connected
- protection device
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model relates to a fresh air cabinet low-temperature anti-freezing protection device, which comprises a temperature controller, wherein the temperature controller is electrically connected with a temperature measuring element, an alarm and an intermediate relay; the temperature measuring element is arranged on a surface cooler of the fresh air cabinet and used for measuring the temperature of the surface cooler; the intermediate relay is electrically connected with an air valve actuator of the fresh air cabinet; through the utility model discloses can the temperature in the cold ware of real-time measurement table, when the temperature was less than temperature controller's setting value, temperature controller switch-on auxiliary relay's response end, auxiliary relay control blast gate executor adjusts the blast gate into the closed condition by the open mode, keeps apart outside cold air, slows down the interior water temperature lowering speed of surface cold ware, and the alarm sends the police dispatch newspaper sound simultaneously, reminds maintainer in time to reach the on-the-spot discharge trouble.
Description
Technical Field
The utility model belongs to the technical field of new fan, concretely relates to new trend rack low temperature protection device that prevents frostbite.
Background
In winter in the north, when the temperature is reduced to be below zero centigrade and the heat exchange tube circulating system of the new fan breaks down, the water in the heat exchange tube flows unsmoothly or stops flowing, and if the air valve is not closed in time, the water in the heat exchange tube can be frozen and expanded rapidly to freeze and explode the heat exchange tube of the surface cooler, so that immeasurable loss is caused.
Disclosure of Invention
Not enough to exist among the prior art, the utility model provides a can in time close the blast gate when new fan heat exchange tube internal water stops flowing, avoid the heat exchange tube to freeze the new trend rack low temperature protection device that explodes.
The technical scheme of the utility model is that: the fresh air cabinet low-temperature anti-freezing protection device comprises a temperature controller, wherein a temperature measuring element, an alarm and an intermediate relay are electrically connected to the temperature controller; the temperature measuring element is arranged on a surface cooler of the fresh air cabinet and used for measuring the temperature of the surface cooler; the intermediate relay is electrically connected with an air valve actuator of the fresh air cabinet.
The temperature controller is electrically connected with the induction end of the intermediate relay, the forward end of the air valve actuator is electrically connected with the fresh air machine controller through the normally closed contact of the intermediate relay, and the backward end of the air valve actuator is electrically connected with the fresh air machine controller through the normally open contact of the intermediate relay.
The temperature controller is an ohm dragon E5CSZ temperature controller.
The temperature measuring element is a thermocouple.
The temperature measuring element is wrapped and fixed on the heat exchange tube of the surface cooler through the copper sheet.
The utility model has the advantages that: through the utility model discloses can the temperature in the cold ware of real-time measurement table, when the temperature was less than temperature controller's setting value, temperature controller switch-on auxiliary relay's response end, auxiliary relay control blast gate executor adjusts the blast gate into the closed condition by the open mode, keeps apart outside cold air, slows down the interior water temperature lowering speed of surface cold ware, and the alarm sends the police dispatch newspaper sound simultaneously, reminds maintainer in time to reach the on-the-spot discharge trouble.
Drawings
Fig. 1 is one of the schematic circuit connection diagrams of the present invention.
Fig. 2 is a second schematic circuit diagram of the present invention.
Fig. 3 is a schematic view of the thermocouple of the present invention.
Detailed Description
The following embodiments are further described with reference to the accompanying drawings and examples, and the following examples are used to describe the technical solutions of the present invention more clearly, but the protection scope of the present invention cannot be limited thereby.
As shown in fig. 1 and 2, the fresh air cabinet low-temperature anti-freezing protection device comprises a temperature controller, wherein a temperature measuring element, an alarm and an intermediate relay KM are electrically connected to the temperature controller; the temperature measuring element is arranged on the surface cooler of the fresh air cabinet and used for measuring the temperature of the surface cooler; the intermediate relay KM is electrically connected with an air valve actuator of the fresh air cabinet.
The temperature controller is electrically connected with the induction end of the intermediate relay KM, the forward end of the air valve actuator is electrically connected with the fresh air fan controller through the normally closed contact of the intermediate relay KM, and the backward end of the air valve actuator is electrically connected with the fresh air fan controller through the normally open contact of the intermediate relay KM.
The embodiment is an improvement of the existing fresh air cabinet, wherein the fresh air controller and the air valve actuator are structures of the existing fresh air cabinet, the fresh air cabinet is in a working state, the forward end of the fresh air controller is communicated with the air valve actuator, the air valve actuator controls the air valve to be in an open state, outside air can enter the fresh air cabinet through the air valve, the temperature measuring element is arranged on the surface cooler through the set lowest temperature value of the temperature controller, the temperature measuring element can detect the temperature of the surface cooler, the temperature is the water temperature in the surface cooler, when the temperature value measured by the temperature measuring element is lower than the set lowest temperature value, the internal contact of the temperature controller is closed, the alarm starts to give an alarm sound to remind maintenance personnel to timely arrive at a site to discharge a fault, the induction end of the intermediate relay KM is electrified, the normally closed contact of the intermediate relay KM is disconnected, the normally open contact is closed, the forward end of the fresh air machine controller and the air valve actuator is disconnected, the backward end of the fresh air machine controller and the air valve actuator is communicated, the air valve actuator drives the air valve to close and isolate external cold air, and the water temperature reduction speed in the surface air cooler is slowed down; on-site fault removal, normal circulation of water in the surface cooler, after the water temperature rises, the normally closed contact and the normally open contact of the intermediate relay KM are both restored to the initial state, the fresh air machine controller is connected with the forward end of the air valve actuator, the air valve actuator drives the air valve to be opened, and the fresh air cabinet starts to work normally.
Furthermore, the temperature controller is an ohm dragon E5CSZ temperature controller, the temperature measuring element is a thermocouple TC, a terminal 1 and a terminal 2 of the temperature controller are connected with the intermediate relay KM through leads, a terminal 4 and a terminal 5 of the temperature controller are connected with the thermocouple TC through shielding wires, and a terminal 7 and a terminal 8 of the temperature controller are connected with the alarm through leads.
Furthermore, the temperature measuring element is bound and fixed on a heat exchange tube of the surface cooler through a copper sheet 2, the temperature measuring element can be selected as a thermocouple TC, the thermocouple TC is parallel to the heat exchange tube 1 on the heat exchange tube 1 in the middle of the surface cooler in the surface cooler box, and the thermocouple TC is wrapped and fixed on the heat exchange tube 1 through the copper sheet 2. The copper sheet 2 has good thermal conductivity, the temperature of the copper sheet 2 can be used as the temperature of the heat exchange tube 1, the thermocouple TC is wrapped on the heat exchange tube 1 through the copper sheet 2, and the measuring area of the thermocouple TC can be enlarged through the copper sheet 2.
Claims (5)
1. The fresh air cabinet low-temperature anti-freezing protection device is characterized by comprising a temperature controller, wherein a temperature measuring element, an alarm and an intermediate relay are electrically connected to the temperature controller; the temperature measuring element is arranged on a surface cooler of the fresh air cabinet and used for measuring the temperature of the surface cooler; the intermediate relay is electrically connected with an air valve actuator of the fresh air cabinet.
2. The fresh air cabinet low-temperature anti-freezing protection device as claimed in claim 1, wherein: the temperature controller is electrically connected with the induction end of the intermediate relay, the forward end of the air valve actuator is electrically connected with the fresh air machine controller through the normally closed contact of the intermediate relay, and the backward end of the air valve actuator is electrically connected with the fresh air machine controller through the normally open contact of the intermediate relay.
3. The fresh air cabinet low-temperature anti-freezing protection device as claimed in claim 1, wherein: the temperature controller is an ohm dragon E5CSZ temperature controller.
4. The fresh air cabinet low-temperature anti-freezing protection device as claimed in claim 1, wherein: the temperature measuring element is a thermocouple.
5. The fresh air cabinet low-temperature anti-freezing protection device as claimed in claim 4, wherein: the temperature measuring element is wrapped and fixed on the heat exchange tube of the surface cooler through the copper sheet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920506767.XU CN209877281U (en) | 2019-04-15 | 2019-04-15 | Low-temperature anti-freezing protection device for fresh air cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920506767.XU CN209877281U (en) | 2019-04-15 | 2019-04-15 | Low-temperature anti-freezing protection device for fresh air cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209877281U true CN209877281U (en) | 2019-12-31 |
Family
ID=68960355
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920506767.XU Expired - Fee Related CN209877281U (en) | 2019-04-15 | 2019-04-15 | Low-temperature anti-freezing protection device for fresh air cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209877281U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218020A (en) * | 2021-05-19 | 2021-08-06 | 济南朗仕环境科技有限公司 | Automatic temperature control system that opens of intelligent new trend system |
-
2019
- 2019-04-15 CN CN201920506767.XU patent/CN209877281U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113218020A (en) * | 2021-05-19 | 2021-08-06 | 济南朗仕环境科技有限公司 | Automatic temperature control system that opens of intelligent new trend system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20191231 |