CN214667711U - Detection system for air conditioner unit suction and exhaust superheat degree - Google Patents
Detection system for air conditioner unit suction and exhaust superheat degree Download PDFInfo
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- CN214667711U CN214667711U CN202120885142.6U CN202120885142U CN214667711U CN 214667711 U CN214667711 U CN 214667711U CN 202120885142 U CN202120885142 U CN 202120885142U CN 214667711 U CN214667711 U CN 214667711U
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Abstract
The utility model provides a detection system for the degree of superheat of suction and exhaust of an air conditioning unit, which comprises a data acquisition unit, a digital-to-analog conversion unit, a main control unit and a display unit which are connected in sequence; the data acquisition unit comprises a first temperature acquisition part, a second temperature acquisition part, a third temperature acquisition part, a first pressure acquisition part, a second pressure acquisition part and a pressure transmitting part, wherein the first temperature acquisition part is arranged at the bottom of a compressor of the air conditioning unit, the second temperature acquisition part is arranged on the wall of a copper pipe at an air inlet of the compressor, and the second temperature acquisition part is arranged on the wall of the copper pipe at an air outlet of the compressor; the first pressure acquisition part is arranged at the thimble port of the air inlet valve of the compressor, and the second pressure acquisition part is arranged at the thimble port of the exhaust valve of the compressor. The system can improve the recognition level of the liquid return risk of the compressor and improve the reliability of unit operation.
Description
Technical Field
The utility model relates to a superheat degree detecting system, specifically speaking relates to a detecting system of air conditioning unit suction and exhaust superheat degree.
Background
With the development of the water chilling unit, the energy saving level and the performance stability of the water chilling unit gradually become important indexes required by customers. The energy-saving level and the performance stability of the water chilling unit are closely related to the control precision of the electronic expansion valve, and the control precision and the response speed of the electronic expansion valve are directly influenced by the suction superheat degree and the exhaust superheat degree of the electronic expansion valve.
The electronic expansion valve of the water chilling unit is higher in control precision and response speed, and the control of the electronic expansion valve mainly comprises the following steps: the suction superheat and the discharge superheat. The test software of the laboratory does not test the air suction superheat degree and the air exhaust superheat degree, and the test software of the laboratory has detection defects for testing the corresponding heat pump unit of the laboratory, provides a detection method of the air exhaust superheat degree and the air suction superheat degree, and adds a new function to the control detection of the electronic expansion valve.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model aims at providing an air conditioning unit inhales exhaust superheat degree's detecting system, this system can improve the compressor and return the discernment level of liquid risk, improves the reliability of unit operation.
Based on the above purpose, the utility model provides a detection system for the superheat degree of air suction and exhaust of an air conditioning unit, which comprises a data acquisition unit, a digital-to-analog conversion unit, a main control unit and a display unit which are connected in sequence;
the data acquisition unit comprises a first temperature acquisition part, a second temperature acquisition part, a third temperature acquisition part, a first pressure acquisition part, a second pressure acquisition part and a pressure transmitting part, wherein the first temperature acquisition part is arranged at the bottom of a compressor of the air conditioning unit, the second temperature acquisition part is arranged on the wall of a copper pipe at an air inlet of the compressor, and the second temperature acquisition part is arranged on the wall of the copper pipe at an air outlet of the compressor; the first pressure acquisition part is arranged at the thimble opening of the compressor air inlet valve, and the second pressure acquisition part is arranged at the thimble opening of the compressor exhaust valve; the first temperature acquisition component, the second temperature acquisition component and the third temperature acquisition component are all connected with the digital-to-analog conversion unit, the first pressure acquisition component and the second pressure acquisition component are all connected with the pressure transmitting component, and the pressure transmitting component is connected with the digital-to-analog conversion unit.
Preferably, the main control unit comprises an upper computer, and the digital-to-analog conversion unit is communicated with the upper computer through a switch.
Preferably, the display unit is integrated on the upper computer.
Preferably, the first temperature acquisition component, the second temperature acquisition component and the third temperature acquisition component are all of a sheet structure, the first temperature acquisition component is attached to the bottom of the compressor, the second temperature acquisition component is attached to the copper pipe wall at the air inlet of the compressor, and the third temperature acquisition component is attached to the copper pipe wall at the air outlet of the compressor.
Preferably, the first temperature collection member, the second temperature collection member and the third temperature collection member each include a thermocouple.
Preferably, the first pressure-collecting part and the second pressure-collecting part each include a pressure sensor.
Preferably, the system further comprises an alarm unit, and the alarm unit is connected with the main control unit.
Compared with the prior art, the beneficial effects of the utility model are that:
the utility model discloses through add temperature and pressure detection part on the compressor of air conditioning unit, make the superheat degree detection passageway, can effectively improve the recognition level of compressor liquid return risk, improve the reliability of unit operation;
in addition, the superheat degree data collected in the detection process is stored and counted, a data correlation analysis report can be formed, and a basis is provided for verifying the stability of the refrigeration system in a laboratory stage.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the application and, together with the description, serve to explain the application and are not intended to limit the application.
Fig. 1 is a schematic view of a connection structure of a detection system for the superheat degree of air suction and exhaust of an air conditioning unit in the embodiment of the present invention.
Wherein, 1, a compressor; 2. a first temperature acquisition component; 3. a second temperature acquisition component; 4. a third temperature acquisition component; 5. a first pressure acquisition component; 6. a second pressure acquisition component; 7. a digital-to-analog conversion unit; 8. a switch; 9. and a main control unit.
Detailed Description
The present invention will be further explained with reference to the accompanying drawings and examples.
It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the disclosure. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.
It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise.
The embodiment also provides a detection system for the suction and exhaust superheat degree of the air conditioning unit, as shown in fig. 1, the system comprises a data acquisition unit, a digital-to-analog conversion unit 7, a main control unit 9 and a display unit which are connected in sequence;
the data acquisition unit comprises a first temperature acquisition part 2, a second temperature acquisition part 3, a third temperature acquisition part 4, a first pressure acquisition part 5, a second pressure acquisition part 6 and a pressure transmitting part, wherein the first temperature acquisition part 2 is arranged at the bottom of a compressor 1 of the air conditioning unit, the second temperature acquisition part 3 is arranged on the wall of a copper pipe at an air inlet of the compressor 1, and the second temperature acquisition part 3 is arranged on the wall of the copper pipe at an air outlet of the compressor 1; the first pressure acquisition part 5 is arranged at the thimble opening of the air inlet valve of the compressor 1, and the second pressure acquisition part 6 is arranged at the thimble opening of the exhaust valve of the compressor 1; the first temperature acquisition component 2, the second temperature acquisition component 3 and the third temperature acquisition component 4 are all connected with the digital-to-analog conversion unit 7, the first pressure acquisition component 5 and the second pressure acquisition component 6 are all connected with the pressure transmitting component, and the pressure transmitting component is connected with the digital-to-analog conversion unit 7.
As a preferred embodiment, the main control unit 9 includes an upper computer, and the digital-to-analog conversion unit 7 communicates with the upper computer through a switch 8.
As a preferred embodiment, the display unit is integrated on the upper computer.
As a preferred embodiment, the first temperature collection part 2, the second temperature collection part 3, and the third temperature collection part 4 are all sheet structures, and the first temperature collection part 2 is attached to the bottom of the compressor 1, the second temperature collection part 3 is attached to the copper pipe wall at the air inlet of the compressor 1, and the third temperature collection part 4 is attached to the copper pipe wall at the air outlet of the compressor 1.
In a preferred embodiment, the first temperature collection member 2, the second temperature collection member 3 and the third temperature collection member 4 each include a thermocouple.
As a preferred embodiment, the first pressure-collecting part 5 and the second pressure-collecting part 6 each comprise a pressure sensor.
As a preferred embodiment, the system further comprises an alarm unit, which is connected with the main control unit 9, and when the superheat degree of the refrigerant in the compressor is detected, or when the main control unit predicts the occurrence of the superheat degree event according to the collected pressure and temperature data, the main control unit starts the alarm unit to alarm the superheat degree.
The system can be applied to the detection of the superheat degree of air suction and exhaust of the air conditioning unit in an enthalpy difference laboratory at the laboratory stage, and the specific implementation process is as follows:
when the unit is installed in the laboratory:
the first step is as follows: the thermocouples are respectively connected to the exhaust and suction port copper pipe walls of the compressor and the bottom of the compressor, the detection position can be adjusted randomly and is not fixed, and the pressure sensor is connected to the corresponding position of a pressure valve of the unit.
The second step is that: the digital-to-analog conversion unit converts the voltage and current analog quantities of the thermocouple and the pressure sensor into temperature and pressure values, and directly transmits the values to the test software through an industrial bus or an Ethernet.
In the test software superheat function:
the temperature sensor acquires the temperature T1 of the exhaust port of the compressor, the temperature T2 of the suction port of the compressor and the temperature T3 of the bottom of the compressor, and the pressure sensor acquires the exhaust pressure P1 and the suction pressure P2;
the data collector is connected with temperature and pressure and sends T1, T2, T3, P1 and P2 back to the main control unit (upper computer).
The main control unit automatically inquires a corresponding pressure-enthalpy diagram according to the type of the refrigerant and inquires a saturation temperature value T corresponding to the pressure according to the current pressure of the refrigerant.
The superheat = refrigerant pressure corresponds to saturation temperature T-refrigerant temperature T1 or T2 or T3, and the calculated superheat is plotted according to test software to show the trend of the curve.
The degree of superheat is analyzed in data correlation with prototype electrical parameters (voltage, current, power), ambient temperature, and the like. Data relevance analysis: correlation analysis
And (3) correlation analysis: a Pearson correlation coefficient algorithm is adopted to measure whether two data sets are on the same line or not, and the linear relation between distance variables is measured. The judgment logic: two data sequences for which correlation is to be analyzed, before performing correlation analysis, it is generally assumed that there is no correlation between the two columns of data. After the correlation analysis is initiated, two quantitative indicators can be obtained: correlation coefficient and significance test probability. Wherein, the probability value is tested to reflect the possibility of no correlation, and if the probability is less than 0.05, the correlation exists between the two data sequences.
The system has the following advantages when being applied to an enthalpy difference laboratory:
1. reliability: the superheat degree is added in the test software, the reliability of the air conditioning unit can be judged more intuitively, the functional deficiency of the enthalpy difference laboratory is compensated, the superheat degree test method plays a very large role in laboratory fault diagnosis and data analysis, and the superheat degree test method is very helpful for operation identification and analysis of a refrigeration system.
2. Performance is improved: the test software can automatically calculate without manual calculation and table look-up and detection.
3. The control is simple: and the connection between each temperature acquisition component and each pressure acquisition component and the digital-to-analog conversion unit is simple and quick.
4. Efficiency improvement: the calculation process is obviously reduced, and the visibility of the test process is increased.
5. And the error caused by artificial calculation is reduced.
6. The change rule of the unit to be tested can be mastered in time, the method is simple and clear, and whether the unit meets the design requirements or not is judged quickly, so that the project investment cost is reduced.
The utility model discloses through add temperature and pressure detection part on the compressor of air conditioning unit, make the superheat degree detection passageway, can effectively improve the recognition level of compressor liquid return risk, improve the reliability of unit operation;
in addition, the superheat degree data collected in the detection process is stored and counted, a data correlation analysis report can be formed, and a basis is provided for verifying the stability of the refrigeration system in a laboratory stage.
Although the embodiments of the present invention have been shown and described, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present invention, and that those skilled in the art can make changes, modifications, substitutions and alterations to the above embodiments without departing from the spirit and scope of the present invention, and that any simple modification, equivalent change and modification made to the above embodiments according to the technical spirit of the present invention still fall within the technical scope of the present invention.
Claims (7)
1. A detection system for the suction and exhaust superheat degree of an air conditioning unit is characterized by comprising a data acquisition unit, a digital-to-analog conversion unit (7), a main control unit (9) and a display unit which are connected in sequence;
the data acquisition unit comprises a first temperature acquisition component (2), a second temperature acquisition component (3), a third temperature acquisition component (4), a first pressure acquisition component (5), a second pressure acquisition component (6) and a pressure transmitting component, wherein the first temperature acquisition component (2) is arranged at the bottom of a compressor (1) of the air conditioning unit, the second temperature acquisition component (3) is arranged on the wall of a copper pipe at an air inlet of the compressor (1), and the second temperature acquisition component (3) is arranged on the wall of the copper pipe at an air outlet of the compressor (1); the first pressure acquisition part (5) is arranged at the thimble opening of an air inlet valve of the compressor (1), and the second pressure acquisition part (6) is arranged at the thimble opening of an exhaust valve of the compressor (1); the temperature acquisition device is characterized in that the first temperature acquisition component (2), the second temperature acquisition component (3) and the third temperature acquisition component (4) are connected with the digital-to-analog conversion unit (7), the first pressure acquisition component (5) and the second pressure acquisition component (6) are connected with the pressure transmission component, and the pressure transmission component is connected with the digital-to-analog conversion unit (7).
2. The system for detecting the superheat of air sucked and exhausted by the air conditioning unit as claimed in claim 1, wherein the main control unit (9) comprises an upper computer, and the digital-to-analog conversion unit (7) is communicated with the upper computer through a switch (8).
3. The system for detecting the superheat degree of air sucked and exhausted by the air conditioning unit as claimed in claim 2, wherein the display unit is integrated on the upper computer.
4. The system for detecting the superheat degree of air sucked and exhausted by the air conditioning unit as claimed in claim 1, wherein the first temperature acquisition component (2), the second temperature acquisition component (3) and the third temperature acquisition component (4) are all of a sheet structure, the first temperature acquisition component (2) is attached to the bottom of the compressor (1), the second temperature acquisition component (3) is attached to the copper pipe wall at the air inlet of the compressor (1), and the third temperature acquisition component (4) is attached to the copper pipe wall at the air outlet of the compressor (1).
5. The system for detecting the superheat of air sucked and exhausted by an air conditioning unit as claimed in claim 4, wherein the first temperature acquisition component (2), the second temperature acquisition component (3) and the third temperature acquisition component (4) comprise thermocouples.
6. The system for detecting the superheat of air sucked and exhausted by an air conditioning unit as claimed in claim 1, wherein the first pressure acquisition component (5) and the second pressure acquisition component (6) comprise pressure sensors.
7. The system for detecting the superheat of air sucked and exhausted by an air conditioning unit as claimed in claim 1, further comprising an alarm unit, wherein the alarm unit is connected with the main control unit (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120885142.6U CN214667711U (en) | 2021-04-27 | 2021-04-27 | Detection system for air conditioner unit suction and exhaust superheat degree |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120885142.6U CN214667711U (en) | 2021-04-27 | 2021-04-27 | Detection system for air conditioner unit suction and exhaust superheat degree |
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| Publication Number | Publication Date |
|---|---|
| CN214667711U true CN214667711U (en) | 2021-11-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120885142.6U Active CN214667711U (en) | 2021-04-27 | 2021-04-27 | Detection system for air conditioner unit suction and exhaust superheat degree |
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| CN (1) | CN214667711U (en) |
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2021
- 2021-04-27 CN CN202120885142.6U patent/CN214667711U/en active Active
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Address after: 323000 No.96 Yunjing Road, Shuige Industrial Park, Lishui City, Zhejiang Province Patentee after: Zhejiang Zhongguang Electric Appliance Group Co.,Ltd. Address before: 323000 No.96 Yunjing Road, Shuige Industrial Park, Lishui City, Zhejiang Province Patentee before: ZHEJIANG ZHONGGUANG ELECTRIC APPLIANCES Co.,Ltd. |