CN219283572U - Dehumidifier heat exchanger air blocking early warning device - Google Patents

Dehumidifier heat exchanger air blocking early warning device Download PDF

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Publication number
CN219283572U
CN219283572U CN202320148405.4U CN202320148405U CN219283572U CN 219283572 U CN219283572 U CN 219283572U CN 202320148405 U CN202320148405 U CN 202320148405U CN 219283572 U CN219283572 U CN 219283572U
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heat exchanger
acquisition module
data acquisition
box body
temperature
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CN202320148405.4U
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Chinese (zh)
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赵玲华
孙鹏
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Shanghai D&s Air Handling Equipment Co ltd
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Shanghai D&s Air Handling Equipment Co ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

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Abstract

The utility model discloses a dehumidifier heat exchanger air blocking early warning device which comprises a PLC (programmable logic controller) integrated machine, a box body, a temperature sensor group and a pressure sensor group, and is characterized in that the PLC integrated machine comprises a touch screen and a data acquisition module; the PLC integrated machine is arranged on the front end panel of the box body, the touch screen is positioned on the outer side, and the data acquisition module is positioned on the inner side; the temperature sensor group is connected with a temperature wiring terminal of the data acquisition module; the pressure sensor group is connected with a pressure wiring terminal of the data acquisition module; the data acquisition module acquires, converts, calculates and transmits temperature and pressure signals; and the touch screen displays data and provides air blocking early warning. The utility model can monitor the running state of the dehumidifier heat exchanger in real time, immediately early warn the occurrence of abnormality, and ensure that the air blockage detection operation is simpler, more convenient and quicker, thereby reducing and avoiding the formation of air blockage.

Description

Dehumidifier heat exchanger air blocking early warning device
Technical Field
The utility model relates to the technical field of dehumidifier air blocking energy conservation, in particular to an air blocking early warning device for a dehumidifier heat exchanger.
Background
When the dehumidifier works, the processing fan pumps the moist air into the dehumidifier, and the moist air is sent into the room after condensation pre-dehumidification and runner adsorption dehumidification by the surface-cooling heat exchanger. Meanwhile, the rotating wheel after absorbing moisture is filled with hot air for desorption, so that the adsorption capacity is restored again, and continuous dehumidification is realized. The indoor humidity is controlled in a proper humidity range by circulating and reciprocating in this way.
In the processes of installing, operating, debugging and overhauling a refrigerant system of the dehumidifier, some air is inevitably mixed into the refrigerant system, and the air is aggregated into air clusters at the high point of a pipeline of the heat exchanger, namely the transverse pipe section at the tail end of the heat exchanger, so that air blockage is formed. On one hand, the air blockage can cause corrosion to the heat exchanger pipeline, so that the service life of the heat exchanger is reduced; on the other hand, the air blocking can cause an air hammer phenomenon, and great potential safety hazards are brought to the operation safety of the pipeline. In addition, the formation of air lock has reduced the cross-sectional area that the heat exchanger pipeline circulated, leads to refrigerant system circulation unsmooth, causes the heat exchanger cold volume unable transmission, leads to the heat exchange efficiency of heat exchanger to reduce, causes the unable effective cooling of post-treatment air, and then weakens the dehumidification performance of dehumidifier, can't satisfy the humidity demand of target environment. Moreover, the operation energy consumption and the operation cost of the refrigerant system are increased.
At present, most of engineering adopts a manual visual inspection method to diagnose whether the dehumidifier heat exchanger is blocked, if the manual experience is insufficient, the existence of the air blockage cannot be rapidly and accurately diagnosed, the existence of the air blockage cannot be rapidly detected, early warning feedback is made, the reliability is poor, the accuracy is low, and great engineering potential safety hazards exist.
Disclosure of Invention
In view of the above-mentioned drawbacks of the prior art, the present utility model aims to solve the technical problem of diagnosing the presence or absence of air blockage based on the actual detection result, and has high reliability and high accuracy.
The utility model provides a dehumidifier heat exchanger air blocking early warning device, which comprises a PLC (programmable logic controller) integrated machine, a box body, a temperature sensor group and a pressure sensor group, wherein the PLC integrated machine comprises a touch screen and a data acquisition module; the PLC integrated machine is arranged on the front end panel of the box body, the touch screen is positioned on the outer side, and the data acquisition module is positioned on the inner side; the temperature sensor group is connected with a temperature wiring terminal of the data acquisition module; the pressure sensor group is connected with a pressure wiring terminal of the data acquisition module; the data acquisition module acquires, converts, calculates and transmits temperature and pressure signals; and the touch screen displays data and provides air blocking early warning.
Preferably, the temperature sensor group comprises a first temperature sensor and a second temperature sensor; the first temperature sensor is used for measuring the temperature of the top pipe wall of the transverse pipe section at the tail end of the dehumidifier heat exchanger; and the second temperature sensor is used for measuring the wall temperature of the bottom of the transverse pipe section at the tail end of the dehumidifier heat exchanger.
Preferably, the pressure sensor group comprises a first pressure sensor and a second pressure sensor; the first pressure sensor is used for measuring the side pressure of the refrigerant inlet of the dehumidifier heat exchanger; the second pressure sensor is used for measuring the side pressure of the refrigerant outlet of the dehumidifier heat exchanger.
Preferably, the box body is provided with a power interface and a switch interface; the power interface is arranged on the side end panel of the box body and is connected with an external power supply of the device to supply power for the device; the switch interface is arranged on the side end panel of the box body and controls the on-off of the circuit of the device.
Preferably, the switch interface is arranged in parallel with the power interface.
Preferably, the box body is provided with a wiring hole, the wiring hole is positioned on a side end panel of the box body, and the input signal wires of temperature and pressure are connected into the data acquisition module inside the box body.
Preferably, a wiring groove and a direct current power supply are arranged in the box body, the wiring groove is used for placing and protecting an internal circuit of the box body, and the direct current power supply is connected with a power supply wiring terminal of the PLC data acquisition module.
Preferably, the box body is provided with heat dissipation holes, and the heat dissipation holes are arranged on the front end panel of the box body and are distributed in a rectangular array.
The dehumidifier heat exchanger air blockage early warning device provided by the utility model has the advantages that the existence of air blockage is diagnosed according to the actual detection result, the reliability is high, and the accuracy is high.
The dehumidifier heat exchanger air blocking early warning device can monitor the running state of the dehumidifier heat exchanger in real time, immediately early warn the occurrence of abnormality, and enable the air blocking detection operation to be simpler, more convenient and quicker, thereby reducing and avoiding the formation of air blocking.
The conception, specific structure, and technical effects of the present utility model will be further described with reference to the accompanying drawings to fully understand the objects, features, and effects of the present utility model.
Drawings
FIG. 1 is a schematic view of the outside construction of a preferred embodiment of the present utility model;
FIG. 2 is a schematic view of the inside structure of a preferred embodiment of the present utility model;
FIG. 3 is a schematic diagram of a sensor according to a preferred embodiment of the present utility model.
Wherein, the liquid crystal display device comprises a liquid crystal display device,
1. a case;
2. a heat radiation hole;
3. a touch screen;
4. a wiring hole;
5. a power interface;
6. a switch interface;
7. a communication port;
8. a PLC download port;
9. an HMI download port;
10. a direct current power supply;
11、T 1 a first wiring terminal;
12、T 1 a second wiring terminal;
13、T 2 a first wiring terminal;
14、T 2 a second wiring terminal;
15. wiring grooves;
16. a first power supply wiring terminal;
17. a second power supply wiring terminal;
18、P 2 a first wiring terminal;
19、P 2 a second wiring terminal;
20、P 1 a first wiring terminal;
21、P 1 a second wiring terminal;
22. a data acquisition module;
23. a first temperature sensor;
24. a second temperature sensor;
25. a first pressure sensor;
26. and a second pressure sensor.
Detailed Description
The following description of the preferred embodiments of the present utility model refers to the accompanying drawings, which make the technical contents thereof more clear and easy to understand. The present utility model may be embodied in many different forms of embodiments and the scope of the present utility model is not limited to only the embodiments described herein.
In the drawings, like structural elements are referred to by like reference numerals and components having similar structure or function are referred to by like reference numerals. The dimensions and thickness of each component shown in the drawings are arbitrarily shown, and the present utility model is not limited to the dimensions and thickness of each component. The thickness of the components is exaggerated in some places in the drawings for clarity of illustration.
As shown in fig. 1 and 2, the present preferred embodiment provides a dehumidifier heat exchanger air-blocking early warning device, which comprises a PLC integrated machine, a box body 1, a temperature sensor group and a pressure sensor group, wherein the PLC integrated machine comprises a touch screen 3 and a data acquisition module 22; the PLC integrated machine is arranged on the front end panel of the box body 1, the touch screen 3 is positioned on the outer side, and the data acquisition module 22 is positioned on the inner side; the temperature sensor group is connected with a temperature wiring terminal of the data acquisition module 22, and the temperature wiring terminal comprises T 1 Binding post one 11, T 1 Binding post two 12, T 2 Binding post one 13, T 2 A second connecting terminal 14; pressure ofThe sensor group is connected with a pressure wiring terminal of the data acquisition module 22, and the pressure wiring terminal comprises P 2 Binding post one 18, P 2 Binding post two 19, P 1 Binding post one 20, P 1 A second connection terminal 22; the data acquisition module 22 acquires, converts, computes and transmits temperature and pressure signals; the touch screen 3 displays data and provides air lock warning.
The temperature sensor group includes a first temperature sensor 22 and a second temperature sensor 24; the first temperature sensor 23 is used for measuring the temperature of the top pipe wall of the transverse pipe section at the tail end of the dehumidifier heat exchanger; the second temperature sensor 24 is used for measuring the bottom pipe wall temperature of the end transverse pipe section of the dehumidifier heat exchanger.
The pressure sensor group comprises a first pressure sensor 25 and a second pressure sensor 26; the first pressure sensor 25 is used for measuring the refrigerant inlet side pressure of the dehumidifier heat exchanger; the second pressure sensor 26 is used for measuring the refrigerant outlet side pressure of the dehumidifier heat exchanger.
The box body 1 is provided with a power interface 5 and a switch interface 6; the power interface 5 is arranged on the side end panel of the box body 1 and is connected with an external power supply of the device to supply power to the device; the switch interface 5 is arranged on the side end panel of the box body 1 and controls the on-off of a circuit of the device.
As shown in fig. 1 and 2, the switch interface 6 of the present preferred embodiment is arranged in parallel with the power source interface 5.
The box 1 is provided with a wiring hole 4, the wiring hole 4 is positioned on the side end panel of the box 1, and the input signal wires of temperature and pressure are connected into the data acquisition module 22 inside the box 1.
As shown in fig. 2, the inside of the box body 1 is provided with a wiring groove 15 and a dc power supply 10, the wiring groove 15 is used for placing and protecting the internal circuit of the box body 1, the dc power supply 10 is connected with a power supply wiring terminal of the data acquisition module 22, and the power supply wiring terminal comprises a first power supply wiring terminal 16 and a second power supply wiring terminal 17.
As shown in fig. 1 and 2, the case 1 of the preferred embodiment is provided with heat dissipation holes 2, and the heat dissipation holes 2 are arranged on a front panel of the case 1 in a rectangular array.
When the dehumidifier heat exchanger operates, the human-computer interface of the touch screen 3 can display T 1 、T 2 、P 1 And P 2 And monitor Δt and Δp.
Wherein T1 is the refrigerant inlet temperature value, T 2 Is the refrigerant outlet temperature value, P 1 Is the pressure value of the refrigerant inlet, P 2 Is the refrigerant outlet pressure value, delta T is the refrigerant inlet and outlet temperature difference, delta P is the refrigerant inlet and outlet pressure difference.
The pressure is reduced due to resistance caused by the flowing of the refrigerant in the pipeline, namely delta P is more than 0, and the normal running state of the dehumidifier heat exchanger is monitored.
When P 1 ＜P 2 When deltaP is smaller than 0, the refrigerant flow is blocked, the running state of the dehumidifier heat exchanger is monitored to be abnormal, and the touch screen prompts the air blocking pressure difference early warning.
The refrigerant system adopted by the dehumidifier generally comprises a low-temperature direct expansion system, 5-10 ℃ low-temperature chilled water, 6-11 ℃ low-temperature chilled water, 7-12 ℃ low-temperature chilled water and 10-15 ℃ medium-temperature chilled water. As can be seen, when the dehumidifier heat exchanger is operating normally, the refrigerant inlet temperature is generally about 0-10 ℃ and the refrigerant outlet temperature is generally about 5-15 ℃. The refrigerant in the heat exchanger pipeline performs convective heat exchange with the external air through the pipe wall, delta T is approximately 0 within a certain error range, and the normal running state of the dehumidifier heat exchanger is monitored. When T is 1 ＞T 2 I.e. DeltaT > 0, and T 1 When the temperature is more than 20 ℃, monitoring the abnormal running state of the dehumidifier heat exchanger, and prompting the air blocking temperature difference early warning by a touch screen.
On-site debugging personnel timely exhaust the air through the exhaust valve at the top end of the heat exchanger according to the early warning information, so that the formation of air blockage is reduced and avoided.
The dehumidifier heat exchanger air blockage early warning device of the preferred embodiment diagnoses whether air blockage exists or not according to the actual detection result, and is high in reliability and accuracy. The running state of the dehumidifier heat exchanger can be monitored in real time, abnormal immediate early warning is realized, so that the air blockage detection operation is simpler, more convenient and quicker, and further, the formation of air blockage is reduced and avoided.
The foregoing describes in detail preferred embodiments of the present utility model. It should be understood that numerous modifications and variations can be made in accordance with the concepts of the utility model without requiring creative effort by one of ordinary skill in the art. Therefore, all technical solutions which can be obtained by logic analysis, reasoning or limited experiments based on the prior art by the person skilled in the art according to the inventive concept shall be within the scope of protection defined by the claims.

Claims (8)

1. The utility model provides a dehumidifier heat exchanger air blocking early warning device, includes PLC all-in-one, box, temperature sensor group and pressure sensor group, its characterized in that, the PLC all-in-one includes touch-sensitive screen and data acquisition module; the PLC integrated machine is arranged on the front end panel of the box body, the touch screen is positioned on the outer side, and the data acquisition module is positioned on the inner side; the temperature sensor group is connected with a temperature wiring terminal of the data acquisition module; the pressure sensor group is connected with a pressure wiring terminal of the data acquisition module; the data acquisition module acquires, converts, calculates and transmits temperature and pressure signals; and the touch screen displays data and provides air blocking early warning.
2. The dehumidifier heat exchanger air lock warning device of claim 1, wherein the temperature sensor set comprises a first temperature sensor and a second temperature sensor; the first temperature sensor is used for measuring the temperature of the top pipe wall of the transverse pipe section at the tail end of the dehumidifier heat exchanger; and the second temperature sensor is used for measuring the wall temperature of the bottom of the transverse pipe section at the tail end of the dehumidifier heat exchanger.
3. The dehumidifier heat exchanger air lock warning device of claim 1, wherein the pressure sensor set comprises a first pressure sensor and a second pressure sensor; the first pressure sensor is used for measuring the side pressure of the refrigerant inlet of the dehumidifier heat exchanger; the second pressure sensor is used for measuring the side pressure of the refrigerant outlet of the dehumidifier heat exchanger.
4. The dehumidifier heat exchanger air-blocking early warning device according to claim 1, wherein a power interface and a switch interface are arranged on the box body; the power interface is arranged on the side end panel of the box body and is connected with an external power supply of the device to supply power for the device; the switch interface is arranged on the side end panel of the box body and controls the on-off of the circuit of the device.
5. The dehumidifier heat exchanger air lock warning device of claim 4, wherein the switch interface is arranged in parallel with the power interface.
6. The dehumidifier heat exchanger air lock warning device of claim 1, wherein the box is provided with a wiring hole, the wiring hole is positioned on a side end panel of the box, and the input signal wires of temperature and pressure are connected into the data acquisition module inside the box.
7. The dehumidifier heat exchanger air-blocking early warning device of claim 1, wherein a wiring groove and a direct current power supply are arranged in the box body, the wiring groove is used for arranging and protecting an internal circuit of the box body, and the direct current power supply is connected with a power supply wiring terminal of the PLC data acquisition module.
8. The dehumidifier heat exchanger air-blocking early warning device according to any one of claims 1 to 7, wherein the box body is provided with heat dissipation holes, and the heat dissipation holes are arranged on a front end panel of the box body and are arranged in a rectangular array.
CN202320148405.4U 2023-01-16 2023-01-16 Dehumidifier heat exchanger air blocking early warning device Active CN219283572U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202320148405.4U CN219283572U (en) 2023-01-16 2023-01-16 Dehumidifier heat exchanger air blocking early warning device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202320148405.4U CN219283572U (en) 2023-01-16 2023-01-16 Dehumidifier heat exchanger air blocking early warning device

Publications (1)

Publication Number Publication Date
CN219283572U true CN219283572U (en) 2023-06-30

Family

ID=86911023

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202320148405.4U Active CN219283572U (en) 2023-01-16 2023-01-16 Dehumidifier heat exchanger air blocking early warning device

Country Status (1)

Country Link
CN (1) CN219283572U (en)

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