CN211900977U - Motor temperature protection system in semi-closed screw compressor - Google Patents
Motor temperature protection system in semi-closed screw compressor Download PDFInfo
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- CN211900977U CN211900977U CN202020127009.XU CN202020127009U CN211900977U CN 211900977 U CN211900977 U CN 211900977U CN 202020127009 U CN202020127009 U CN 202020127009U CN 211900977 U CN211900977 U CN 211900977U
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Abstract
The utility model relates to a motor temperature protection system among semi-closed screw compressor, including the first miniature circuit breaker that control screw compressor working circuit opened, with the scram switch terminal that screw compressor working circuit is connected, establish temperature sensor, temperature controller, the miniature circuit breaker of second and alarm on semi-closed screw compressor motor housing. The temperature controller comprises a temperature controller coil and a temperature controller normally open contact; one end of the first miniature circuit breaker is connected with a live wire, and the other end of the first miniature circuit breaker is connected with an emergency stop switch terminal; one end of the temperature controller coil is connected with the temperature sensor and the zero line respectively, the other end of the temperature controller coil is connected with one end of the second miniature circuit breaker, and the other end of the second miniature circuit breaker is connected with the live wire; one end of a normally open contact of the temperature controller is connected with the live wire, the other end of the normally open contact of the temperature controller is connected with one end of the alarm, and the other end of the alarm is connected with the zero line. The utility model discloses a set up temperature and report to the police and remind setting up when staff and force the disconnection compressor power, protect effective protection to the motor.
Description
Technical Field
The utility model belongs to the technical field of the temperature protection technique and specifically relates to a motor temperature protection system among semi-enclosed screw compressor is related to.
Background
The cooling mode of the motor in the existing semi-closed screw compressor is suction cooling, once the low-pressure part of the system is evacuated or an electrical fault occurs, the motor in the semi-closed screw compressor is easy to burn out, and once the motor serving as the most important and expensive core component in the semi-closed screw compressor is burnt out, the pollution and the great loss of the whole compression system can be caused.
The prior art does not design a system for monitoring and protecting the temperature of a motor in a semi-closed screw compressor, so that a system for timely finding that the temperature of the motor in the compressor is too high and protecting the motor is urgently needed.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a be convenient for realize motor temperature protection system among semi-closed screw compressor.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
a motor temperature protection system in a semi-closed screw compressor comprises a first miniature circuit breaker QF1 for controlling the opening of a working circuit of the screw compressor, an emergency stop switch terminal ES for connecting with the working circuit of the screw compressor, a temperature sensor ST arranged on a motor shell in the semi-closed screw compressor, a temperature controller TC, a second miniature circuit breaker QF2 and an alarm BZ; wherein the content of the first and second substances,
the temperature controller TC comprises a temperature controller coil and a temperature controller normally open contact;
one end of the first miniature circuit breaker QF1 is connected with a live wire L, the other end of the first miniature circuit breaker QF1 is connected with an emergency stop switch terminal ES, and the emergency stop switch terminal ES is also connected with a compressor circuit;
one end of the temperature controller coil is connected with the temperature sensor ST and the zero line N respectively, the other end of the temperature controller coil is connected with one end of the second miniature circuit breaker QF2, and the other end of the second miniature circuit breaker QF2 is connected with the live wire L;
one end of a normally open contact of the temperature controller is connected with the live wire L, the other end of the normally open contact of the temperature controller is connected with one end of the alarm BZ, and the other end of the alarm BZ is connected with the zero line N.
Through adopting above-mentioned technical scheme, temperature sensor ST detects the motor temperature, and when the temperature value more than or equal to first temperature threshold value of testing, temperature controller normally open contact is closed, and alarm BZ exports the warning because of the closed electricity that gets of temperature controller normally open contact, informs the personnel on duty to break off semi-closed screw compressor power and avoids burning out the motor because of the high temperature.
The present invention may be further configured in a preferred embodiment as: the device also comprises an intermediate relay KA and an alternating current contactor KM; wherein the content of the first and second substances,
the intermediate relay KA comprises an intermediate relay coil and an intermediate relay normally open contact;
the alternating current contactor KM comprises an alternating current contactor coil and an alternating current contactor normally closed contact;
the temperature controller TC also comprises a normally closed contact of the temperature controller;
one end of the intermediate relay coil is connected with a zero line N, the other end of the intermediate relay coil is connected with one end of a normally closed contact of a temperature controller, and the other end of the normally closed contact of the temperature controller is connected with a live line L;
one end of the coil of the alternating current contactor is connected with a zero line N, the other end of the coil of the alternating current contactor is connected with one end of a normally open contact of the intermediate relay, and the other end of the normally open contact of the intermediate relay is connected with a live line L;
one end of the normally closed contact of the alternating current contactor is connected with one end of the first miniature circuit breaker QF1, and the other end of the normally closed contact of the alternating current contactor is connected with the emergency stop switch terminal ES.
Through adopting above-mentioned technical scheme, when the temperature value that temperature sensor ST tested is greater than or equal to the second temperature threshold value, temperature controller normally closed contact is opened, the auxiliary relay coil loses the electricity because of temperature controller normally closed contact is opened, the auxiliary relay coil loses the electricity back auxiliary relay normally open contact closure, the ac contactor coil gets electricity because of the auxiliary relay normally open contact closure, the ac contactor normally closed contact is opened after the ac contactor coil gets electricity, opening of ac contactor normally closed contact will break off the power of compressor, thereby force the shut down of compressor, thereby prevent that the motor from continuing overheated burnout the motor and protected the motor.
The present invention may be further configured in a preferred embodiment as: the intermediate relay KA is RM1A45-230 VAC.
The present invention may be further configured in a preferred embodiment as: the model of the alternating current contactor KM is Zhengtai CJX2-3201/220 v.
The present invention may be further configured in a preferred embodiment as: the alarm BZ is any one of a sound alarm, a vibration alarm or a light alarm.
By adopting the technical scheme, the on-duty personnel are reminded of the situation that the motor needs to be powered off under the high-temperature condition through sound, vision or combination of sound and vision.
The present invention may be further configured in a preferred embodiment as: the first miniature circuit breaker QF1 and the second miniature circuit breaker QF2 are BKN1PD 10A in model.
The present invention may be further configured in a preferred embodiment as: the model of the temperature controller TC is XMTG-308220V.
The present invention may be further configured in a preferred embodiment as: the temperature sensor ST is a magnetic-type temperature sensor.
To sum up, the utility model discloses a following at least one useful technological effect:
1. detect the motor temperature through temperature sensor ST, when the temperature value that tests was more than or equal to first temperature threshold, the closed temperature controller normally open contact, alarm BZ exports the warning because of the closed electricity that gets of temperature controller normally open contact, informs the personnel on duty to break off semi-enclosed screw compressor power and avoids burning out the motor because of the high temperature.
2. Detect motor temperature through temperature sensor ST, when the temperature value that temperature sensor ST tested is greater than or equal to the second temperature threshold value, temperature controller normal close contact is opened, the auxiliary relay coil loses the electricity because of temperature controller normal close contact is opened, the auxiliary relay normally open contact is closed after the auxiliary relay coil loses the electricity, the ac contactor coil obtains the electricity because of the auxiliary relay normally open contact is closed, the ac contactor normally close contact is opened after the ac contactor coil obtains the electricity, the power of compressor will be cut off in opening of ac contactor normally close contact, thereby force the shut down of compressor, thereby prevent that the motor from continuing overheated burnout the motor and protected the motor.
Drawings
Fig. 1 is an electrical schematic diagram of a motor temperature protection system in a semi-hermetic screw compressor according to a first embodiment of the present invention;
fig. 2 is an electrical schematic diagram of a motor temperature protection system in a semi-hermetic screw compressor according to a second embodiment of the present invention.
Reference numerals: QF1, first miniature circuit breaker; ES, emergency stop switch terminal; ST, a temperature sensor; TC, a temperature controller; QF2, second miniature circuit breaker; BZ and an alarm; KA. An intermediate relay; KM, an alternating current contactor; l, a live wire; n, zero line.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Referring to fig. 1, fig. 1 is an electrical schematic diagram of a motor temperature protection system in a semi-hermetic screw compressor according to a first embodiment of the present invention. A motor temperature protection system in a semi-closed screw compressor comprises a first miniature circuit breaker QF1 for controlling a working circuit of the screw compressor to be opened, an emergency stop switch terminal ES for being connected with the working circuit of the screw compressor, a temperature sensor ST arranged on a motor shell in the semi-closed screw compressor, a temperature controller TC, a second miniature circuit breaker QF2 and an alarm BZ, wherein the temperature controller TC comprises a temperature controller coil and a temperature controller normally open contact;
one end of the first miniature circuit breaker QF1 is connected with the live wire L, and the other end thereof is connected with the emergency stop switch terminal ES, and the emergency stop switch terminal ES is further connected with the compressor circuit.
One end of the temperature controller coil is connected with the temperature sensor ST and the zero line N respectively, the other end of the temperature controller coil is connected with one end of the second miniature circuit breaker QF2, and the other end of the second miniature circuit breaker QF2 is connected with the live wire L.
One end of a normally open contact of the temperature controller is connected with the live wire L, the other end of the normally open contact of the temperature controller is connected with one end of the alarm BZ, and the other end of the alarm BZ is connected with the zero line N.
Wherein, the brand of compressor is: the model of the compressor is CSH 7573-90-40P.
The first miniature circuit breaker QF1 and the second miniature circuit breaker QF2 are BKN1PD 10A in model.
Wherein the model of the temperature controller is XMTG-308220V.
Wherein, the temperature sensor is a magnetic-type temperature sensor.
The alarm BZ is any one of a sound alarm, a vibration alarm and/or a light alarm. When the alarm BZ is powered on, the buzzer alarm can be used for carrying out buzzer alarm, or the voice prompt alarm can be used for carrying out voice prompt alarm; the vibration alarm can be a touch alarm capable of generating vibration and can give an alarm by generating vibration; the light alarm can be set as an LED lamp, and light alarm is sent out through continuous flashing or long-time lighting of the LED lamp. In the concrete implementation, when reporting to the police, can adopt one or more among the above-mentioned alarm to report to the police, the utility model discloses do not do the restriction to this. For example, only the buzzer alarm can be used for carrying out buzzer alarm, or the buzzer alarm and the vibration alarm can be simultaneously used for carrying out alarm so as to enhance the alarm intensity, so that the person on duty can timely pay attention to and receive the alarm sent by the alarm.
The working principle of the embodiment is as follows: when the first miniature circuit breaker QF1 is closed, the semi-hermetic screw compressor enters the working state. The temperature sensor ST of setting on motor housing in semi-closed screw compressor will test the semi-closed screw compressor in the temperature signal transmission of motor and give the temperature controller coil, first temperature threshold value is predetermine in the chip in the temperature controller, when the temperature value that temperature sensor ST tested is greater than or equal to first temperature threshold value, the closed temperature controller normally open contact, alarm BZ is because of the closed output warning that gets electricity of temperature controller normally open contact, inform the personnel on duty disconnection semi-closed screw compressor power and avoid burning out the motor because of the high temperature.
Referring to fig. 2, fig. 2 is an electrical schematic diagram of a motor temperature protection system in a semi-hermetic screw compressor according to a second embodiment of the present invention. The utility model provides a motor temperature protection system still includes auxiliary relay KA and AC contactor KM among the semi-enclosed screw compressor, and auxiliary relay KA includes auxiliary relay coil and auxiliary relay normally open contact, and AC contactor KM includes AC contactor coil and AC contactor normally closed contact, and temperature controller TC still includes temperature controller normally closed contact.
One end of the intermediate relay coil is connected with the zero line N, the other end of the intermediate relay coil is connected with one end of the normally closed contact of the temperature controller, and the other end of the normally closed contact of the temperature controller is connected with the live line L.
One end of the coil of the alternating current contactor is connected with a zero line N, the other end of the coil of the alternating current contactor is connected with one end of a normally open contact of the intermediate relay, and the other end of the normally open contact of the intermediate relay is connected with a live line L.
One end of the normally closed contact of the alternating current contactor is connected with one end of the first miniature circuit breaker QF1, and the other end of the normally closed contact of the alternating current contactor is connected with the emergency stop switch terminal ES.
Wherein the model of the intermediate relay is RM1A45-230 VAC.
Wherein the type of the alternating current contactor is Zhengtai CJX2-3201/220 v.
The working principle of the embodiment is as follows: when the first miniature circuit breaker QF1 is closed, the semi-hermetic screw compressor enters the working state. The temperature sensor ST of setting on motor housing among the semi-enclosed screw compressor will test the semi-enclosed screw compressor in the temperature signal of motor send for the temperature controller coil, predetermine first temperature threshold value in the chip among the temperature controller, when the temperature value that temperature sensor ST tested is greater than or equal to first temperature threshold value, the closed temperature controller normally open contact, alarm BZ is because of the closed output warning that gets electricity of temperature controller normally open contact. When the power supply of the semi-closed screw compressor is not disconnected, the temperature of the motor continues to rise. The second temperature threshold value is preset in the chip in the temperature controller, when the temperature value that temperature sensor ST tested is greater than or equal to the second temperature threshold value, temperature controller normally closed contact is opened, the intermediate relay coil loses the electricity because of temperature controller normally closed contact is opened, the intermediate relay normally open contact is closed after the intermediate relay coil loses the electricity, the ac contactor coil obtains the electricity because of the intermediate relay normally open contact is closed, the ac contactor normally closed contact is opened after the ac contactor coil obtains the electricity, the power of compressor will be cut off in opening of ac contactor normally closed contact, thereby shut down the compressor by force, thereby prevent that the motor from continuing overheated burnout the motor and having protected the motor.
The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.
Claims (8)
1. The utility model provides a motor temperature protection system in semi-closed helical-lobe compressor which characterized in that: the intelligent control system comprises a first miniature circuit breaker (QF 1) for controlling the opening of a working circuit of the screw compressor, an emergency stop switch terminal (ES) for connecting with the working circuit of the screw compressor, a temperature Sensor (ST) arranged on a motor shell in the semi-closed screw compressor, a Temperature Controller (TC), a second miniature circuit breaker (QF 2) and an alarm (BZ); wherein the content of the first and second substances,
the Temperature Controller (TC) comprises a temperature controller coil and a temperature controller normally open contact;
one end of the first miniature circuit breaker (QF 1) is connected with a live wire (L), the other end of the first miniature circuit breaker is connected with an emergency stop switch terminal (ES), and the emergency stop switch terminal (ES) is also connected with a compressor circuit;
one end of the temperature controller coil is respectively connected with the temperature Sensor (ST) and the zero line (N), the other end of the temperature controller coil is connected with one end of a second miniature circuit breaker (QF 2), and the other end of the second miniature circuit breaker (QF 2) is connected with the live wire (L);
one end of a normally open contact of the temperature controller is connected with the live wire (L), the other end of the normally open contact of the temperature controller is connected with one end of the alarm (BZ), and the other end of the alarm (BZ) is connected with the zero line (N).
2. The system of claim 1, wherein the motor temperature protection system comprises: the device also comprises an intermediate relay (KA) and an alternating current contactor (KM); wherein the content of the first and second substances,
the intermediate relay (KA) comprises an intermediate relay coil and an intermediate relay normally open contact;
the alternating current contactor (KM) comprises an alternating current contactor coil and an alternating current contactor normally closed contact;
the Temperature Controller (TC) also comprises a temperature controller normally closed contact;
one end of the intermediate relay coil is connected with a zero line (N), the other end of the intermediate relay coil is connected with one end of a normally closed contact of the temperature controller, and the other end of the normally closed contact of the temperature controller is connected with a live line (L);
one end of the coil of the alternating current contactor is connected with a zero line (N), the other end of the coil of the alternating current contactor is connected with one end of a normally open contact of the intermediate relay, and the other end of the normally open contact of the intermediate relay is connected with a live wire (L);
one end of the normally closed contact of the alternating current contactor is connected with one end of a first miniature circuit breaker (QF 1), and the other end of the normally closed contact of the alternating current contactor is connected with an emergency stop switch terminal (ES).
3. The system for protecting the temperature of the motor in a semi-hermetic screw compressor according to claim 2, characterized in that said intermediate relay (KA) is of the type RM1a45-230 VAC.
4. The system for protecting the temperature of the motor in the semi-hermetic screw compressor according to claim 2, wherein the type of the ac contactor (KM) is zhentai CJX2-3201/220 v.
5. The system for protecting the temperature of the motor in the semi-closed screw compressor according to claim 1 or 2, characterized in that the alarm (BZ) is any one of an audible alarm, a vibration alarm or a light alarm.
6. The motor temperature protection system in semi-hermetic screw compressor according to claim 1, characterized in that the first micro breaker (QF 1) and the second micro breaker (QF 2) are BKN1PD 10A.
7. The system for protecting the temperature of the motor in the semi-hermetic screw compressor according to claim 1, wherein the Temperature Controller (TC) is XMTG-308220V.
8. System for protecting the temperature of an electric motor in a semi-hermetic screw compressor, in accordance with claim 1, characterized in that said temperature Sensor (ST) is a magnetic temperature sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020127009.XU CN211900977U (en) | 2020-01-20 | 2020-01-20 | Motor temperature protection system in semi-closed screw compressor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202020127009.XU CN211900977U (en) | 2020-01-20 | 2020-01-20 | Motor temperature protection system in semi-closed screw compressor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN211900977U true CN211900977U (en) | 2020-11-10 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202020127009.XU Active CN211900977U (en) | 2020-01-20 | 2020-01-20 | Motor temperature protection system in semi-closed screw compressor |
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| Country | Link |
|---|---|
| CN (1) | CN211900977U (en) |
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2020
- 2020-01-20 CN CN202020127009.XU patent/CN211900977U/en active Active
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