CN212898849U - Two-stage compression air compressor cooling system - Google Patents
Two-stage compression air compressor cooling system Download PDFInfo
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- CN212898849U CN212898849U CN202021236250.2U CN202021236250U CN212898849U CN 212898849 U CN212898849 U CN 212898849U CN 202021236250 U CN202021236250 U CN 202021236250U CN 212898849 U CN212898849 U CN 212898849U
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- air compressor
- compression air
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- stage compression
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Abstract
The utility model discloses a two-stage compression air compressor cooling system, including temperature monitoring unit and fan control unit, the temperature monitoring unit is including setting up the temperature sensor in two-stage compression air compressor, the utility model discloses a temperature monitoring unit carries out real-time detection to the temperature in two-stage compression air compressor to design one-level amplifier circuit and second grade amplifier circuit and handle temperature sensor's output signal, promoted the accuracy of temperature detection well; the controller controls the output of the frequency converter according to the temperature detection value in the fan control unit, and then controls the rotating speed of the fan, so that the internal heat of the air compressor is kept in a safe range all the time in the long-time working process, and the safe and stable operation of the air compressor is guaranteed.
Description
Technical Field
The utility model relates to an air compressor technical field especially relates to doublestage compression air compressor machine cooling system.
Background
The double-stage compression air compressor utilizes an isothermal compression principle, isothermal compression is achieved, a large amount of heat waste is avoided, the utilization efficiency of energy is high, energy consumption can be effectively reduced by adopting the double-stage compression, and therefore higher use power and gas use value are brought, and the double-stage compression air compressor has good use value. Because most double-stage compression air compressors are installed indoors, the ventilation effect is poor, long-time work can lead to a large amount of heat accumulated in the air compressors, the working temperature of the air compressors is high, and the air compressors are shut down due to the fact that the heat dissipation effect is poor and the outlet temperature of the air compressors is higher than a protection value.
So the utility model provides a new scheme to solve the problem.
SUMMERY OF THE UTILITY MODEL
To the above situation, in order to overcome the defects of the prior art, the present invention is directed to a two-stage compression air compressor cooling system.
The technical scheme for solving the problem is as follows: the cooling system of the double-stage compression air compressor comprises a temperature monitoring unit and a fan control unit, wherein the temperature monitoring unit comprises a temperature sensor arranged in the double-stage compression air compressor, and a detection signal of the temperature sensor is processed by a first-stage amplifying circuit and a second-stage amplifying circuit and then is sent to an A/D converter to be converted into a digital quantity; the fan control unit comprises a controller, a frequency converter and a fan, the controller is connected with the A/D converter and is communicated with the frequency converter through a serial port, and the frequency converter is used for controlling the rotating speed of the fan.
Preferably, the primary amplifying circuit comprises an operational amplifier AR1, a non-inverting input terminal of the operational amplifier AR1 is connected to a signal output terminal of the temperature sensor through a resistor R1, an inverting input terminal of the operational amplifier AR1 is connected to a +5V power supply through a resistor R2, and is grounded through a capacitor C1 and a rheostat RP1 which are connected in parallel, and an output terminal of the operational amplifier AR1 is connected to an input terminal of the secondary amplifying circuit through a zener diode DZ 1.
Preferably, the second-stage amplifying circuit includes an operational amplifier AR2, an inverting input terminal of the operational amplifier AR2 is connected to the output terminal of the first-stage amplifying circuit and one end of a rheostat RP2 through a resistor R3, and is connected to an output terminal of an operational amplifier AR2 through a resistor R4 and a capacitor C3 which are connected in parallel, a non-inverting input terminal of the operational amplifier AR2 is connected to the output terminal of the operational amplifier AR3 and one end of a resistor R5, the other end of the resistor R5 is connected to the non-inverting input terminal of the operational amplifier AR3 and the other end and a sliding terminal of the rheostat RP2, and is grounded through a capacitor C2, the inverting input terminal of the operational amplifier AR3 is grounded, and the output terminal of the operational amplifier AR2 is.
Preferably, the controller is a PLC control module.
Through the technical scheme, the beneficial effects of the utility model are that:
1. the utility model discloses a temperature monitoring unit carries out real-time detection to the temperature in the doublestage compression air compressor machine to design first grade amplifier circuit and second grade amplifier circuit and handle temperature sensor's output signal, promoted the accuracy of temperature detection well;
2. the controller controls the output of the frequency converter according to the temperature detection value in the fan control unit, and then controls the rotating speed of the fan, so that the internal heat of the air compressor is kept in a safe range all the time in the long-time working process, and the safe and stable operation of the air compressor is guaranteed.
Drawings
Fig. 1 is a schematic circuit diagram of the temperature monitoring unit of the present invention.
Detailed Description
The foregoing and other features, aspects and utilities of the present invention will be apparent from the following more particular description of the embodiments of the invention, as illustrated in the accompanying drawings and described in the accompanying drawings of which 1 is a part hereof. The structural contents mentioned in the following embodiments are all referred to the attached drawings of the specification.
Exemplary embodiments of the present invention will be described below with reference to the accompanying drawings.
The cooling system of the double-stage compression air compressor comprises a temperature monitoring unit and a fan control unit, wherein the temperature monitoring unit comprises a temperature sensor arranged in the double-stage compression air compressor, and a detection signal of the temperature sensor is processed by a first-stage amplifying circuit and a second-stage amplifying circuit and then is sent to an A/D converter to be converted into a digital quantity; the fan control unit comprises a controller, a frequency converter and a fan, when the fan control unit is specifically set, the controller selects a PLC control module, the PLC control module is connected with an A/D converter and is communicated with the frequency converter through a serial port, and the frequency converter is used for controlling the rotating speed of the fan.
In order to improve the accuracy of the temperature monitoring unit in amplifying the temperature detection signal, a primary amplifying circuit and a secondary amplifying circuit are designed to process the output signal of the temperature sensor. As shown in fig. 1, the primary amplifying circuit includes an operational amplifier AR1, a non-inverting input terminal of the operational amplifier AR1 is connected to a signal output terminal of the temperature sensor through a resistor R1, an inverting input terminal of the operational amplifier AR1 is connected to a +5V power supply through a resistor R2, and is grounded through a capacitor C1 and a varistor RP1 connected in parallel, and an output terminal of the operational amplifier AR1 is connected to an input terminal of the secondary amplifying circuit through a zener diode DZ 1. The operational amplifier AR1 firstly amplifies the temperature detection signal in phase, the resistor R2 and the rheostat RP1 form a series voltage dividing resistor, the inverting input end of the operational amplifier AR1 provides a reference comparison voltage, thereby improving the output waveform of the operational amplifier, and finally the amplitude of the operational amplifier is stabilized by the voltage stabilizing diode DZ1 and then the operational amplifier is sent to the secondary amplifying circuit for further amplification.
The two-stage amplifying circuit comprises an operational amplifier AR2, an inverting input terminal of the operational amplifier AR2 is connected with an output terminal of the one-stage amplifying circuit and one end of a rheostat RP2 through a resistor R3, and is connected with an output terminal of the operational amplifier AR2 through a resistor R4 and a capacitor C3 which are connected in parallel, a non-inverting input terminal of the operational amplifier AR2 is connected with an output terminal of an operational amplifier AR3 and one end of a resistor R5, the other end of a resistor R5 is connected with a non-inverting input terminal of the operational amplifier AR3 and the other end and a sliding terminal of the rheostat RP2, and is grounded through a capacitor C2, an inverting input terminal of the operational amplifier AR3 is grounded, and an output terminal of the. The resistor R3 and the rheostat RP2 are connected in parallel to shunt output signals of the primary amplifying circuit, a part of the output signals are shunted by the resistor R3 and then sent to the operational amplifier AR2 for secondary amplification, and the resistor R4 and the capacitor C3 form resistance-capacitance feedback compensation in the amplification process, so that system errors are greatly reduced; and another part of signal shunt signals are sent into an operational amplifier AR3, and the part of signals are sent into a non-inverting input end of an operational amplifier AR2 after being amplified in phase by an operational amplifier AR3 and are offset with operational amplifier offset voltage input by a non-inverting input end of an operational amplifier AR2, so that the aim of eliminating temperature drift is achieved, and the accuracy of temperature detection is greatly ensured.
The utility model discloses when specifically using, the temperature monitoring unit carries out real-time detection to the inside temperature of doublestage compression air compressor machine to design one-level amplifier circuit and second grade amplifier circuit and come to handle temperature sensor's output signal, promoted temperature detection's accuracy well. After the output quantity of the temperature monitoring unit is subjected to data processing by the PLC control module, the output of the frequency converter is controlled according to the temperature value, and then the rotating speed of the fan is controlled, namely the temperature is higher than the rotating speed of the fan, so that the internal heat of the air compressor is kept in a safe range all the time in the long-time working process, and the safe and stable operation of the air compressor is ensured.
The present invention has been described in further detail with reference to the specific embodiments, which should not be construed as limiting the present invention; to the utility model discloses affiliated and relevant technical field's technical personnel are based on the utility model discloses under the technical scheme thinking prerequisite, the extension of doing and the replacement of operating method, data all should fall within the utility model discloses within the protection scope.
Claims (4)
1. Doublestage compression air compressor machine cooling system, including temperature monitoring unit and fan control unit, its characterized in that: the temperature monitoring unit comprises a temperature sensor arranged in the two-stage compression air compressor, and a detection signal of the temperature sensor is processed by a first-stage amplification circuit and a second-stage amplification circuit and then is sent to an A/D converter to be converted into digital quantity; the fan control unit comprises a controller, a frequency converter and a fan, the controller is connected with the A/D converter and is communicated with the frequency converter through a serial port, and the frequency converter is used for controlling the rotating speed of the fan.
2. The two-stage compression air compressor cooling system according to claim 1, characterized in that: the primary amplifying circuit comprises an operational amplifier AR1, the non-inverting input end of the operational amplifier AR1 is connected with the signal output end of the temperature sensor through a resistor R1, the inverting input end of the operational amplifier AR1 is connected with a +5V power supply through a resistor R2 and is grounded through a capacitor C1 and a rheostat RP1 which are connected in parallel, and the output end of the operational amplifier AR1 is connected with the input end of the secondary amplifying circuit through a voltage stabilizing diode DZ 1.
3. The two-stage compression air compressor cooling system according to claim 2, characterized in that: the two-stage amplifying circuit comprises an operational amplifier AR2, the inverting input end of an operational amplifier AR2 is connected with the output end of the first-stage amplifying circuit and one end of a rheostat RP2 through a resistor R3, the output end of an operational amplifier AR2 is connected through a resistor R4 and a capacitor C3 which are connected in parallel, the non-inverting input end of an operational amplifier AR2 is connected with the output end of an operational amplifier AR3 and one end of a resistor R5, the other end of a resistor R5 is connected with the non-inverting input end of an operational amplifier AR3 and the other end and the sliding end of a rheostat RP2, the non-inverting input end of the operational amplifier AR3 is grounded through a capacitor C2, and the output end of the operational amplifier AR2 is connected with.
4. The two-stage compression air compressor cooling system according to any one of claims 1 to 3, characterized in that: the controller is a PLC control module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021236250.2U CN212898849U (en) | 2020-06-30 | 2020-06-30 | Two-stage compression air compressor cooling system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021236250.2U CN212898849U (en) | 2020-06-30 | 2020-06-30 | Two-stage compression air compressor cooling system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN212898849U true CN212898849U (en) | 2021-04-06 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021236250.2U Active CN212898849U (en) | 2020-06-30 | 2020-06-30 | Two-stage compression air compressor cooling system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN212898849U (en) |
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2020
- 2020-06-30 CN CN202021236250.2U patent/CN212898849U/en active Active
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