CN213514337U - Liquid distribution quantity adjusting device for refrigeration falling film evaporator - Google Patents
Liquid distribution quantity adjusting device for refrigeration falling film evaporator Download PDFInfo
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- CN213514337U CN213514337U CN202022481665.2U CN202022481665U CN213514337U CN 213514337 U CN213514337 U CN 213514337U CN 202022481665 U CN202022481665 U CN 202022481665U CN 213514337 U CN213514337 U CN 213514337U
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- expansion valve
- film evaporator
- temperature sensor
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- falling film
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Abstract
A liquid distribution quantity adjusting device for a refrigeration falling film evaporator relates to the technical field of refrigeration air conditioners. The utility model discloses a connect gradually refrigeration compressor, condenser, drier-filter, electronic expansion valve, falling film evaporator and the temperature sensor of breathing in that forms the loop. The structure is characterized by also comprising an electronic liquid level sensor, a temperature sensor and a pressure sensor. The electronic liquid level sensor is positioned on the side of the condenser, the temperature sensor and the pressure sensor are positioned on a pipeline of the suction end of the refrigeration compressor, and the electronic liquid level sensor, the temperature sensor and the pressure sensor are all connected to the controller to drive the electronic expansion valve to control the opening degree of the electronic expansion valve. Compared with the prior art, the utility model discloses adjust two kinds of tradition regulation forms organically and combine together, get the strong point and mend the weak point, two kinds of modes joint control electronic expansion valve's aperture to the realization is adjusted falling liquid film evaporator cloth liquid volume accurately, makes refrigerating unit's operating efficiency and stability all have had qualitative improvement.
Description
Technical Field
The utility model relates to a refrigeration air conditioner technical field especially adopts mixed type falling film evaporator's cloth liquid volume adjusting device.
Background
At present, in large public building air conditioning systems, refrigeration air conditioning units equipped with high-performance falling-film evaporators are increasingly used. In view of the non-uniformity of heat transfer, most of these evaporators also fall into the form of "falling film + flooded" mixed falling film heat transfer. Therefore, the liquid distribution quantity of the heat exchange tube bundle is reasonably and accurately adjusted, and the heat exchange tube bundle can uniformly exchange heat according to the area.
In the prior art, the refrigerant liquid distribution amount adjusting device of the evaporator generally has 2 types: one is to adjust the opening of the electronic expansion valve through the feedback signal of the electronic liquid level sensor to maintain the liquid level of the full liquid area of the evaporator. This mode is indirectly adjusted the liquid distribution volume, only can satisfy the even spraying of design operating mode, and the reaction is sluggish when becoming operating mode, appears the imbalance easily, causes compressor liquid to hit the damage, and stability is extremely poor. The other is to adjust the opening degree of the electronic expansion valve by a feedback signal of the suction superheat degree. The method directly adjusts the liquid distribution amount and maintains the spray heat exchange of the falling film area of the evaporator. Although the control is simple, the liquid level of the full liquid area of the evaporator is not easy to ensure, stable excessive liquid distribution cannot be formed, dry evaporation is generated locally by the heat exchange tube bundle, the heat exchange performance is reduced, and the wide application and popularization of the falling film evaporator refrigeration system in a large public building air conditioning system are influenced.
Disclosure of Invention
To the deficiencies existing in the prior art, the utility model aims to provide a cloth liquid volume adjusting device for refrigeration falling film evaporator. The two traditional adjusting modes are organically combined to make up for the deficiency, and the two modes jointly control the opening degree of the electronic expansion valve, so that the liquid distribution quantity of the falling film evaporator is accurately adjusted, and the operating efficiency and the stability of the refrigerating unit are qualitatively improved.
In order to achieve the above object, the technical solution of the present invention is implemented as follows:
a liquid distribution quantity adjusting device for a refrigeration falling film evaporator comprises a refrigeration compressor, a condenser, a drying filter, an electronic expansion valve, the falling film evaporator and an air suction temperature sensor which are sequentially connected to form a loop. The structure is characterized by also comprising an electronic liquid level sensor, a temperature sensor and a pressure sensor. The electronic liquid level sensor is positioned on the side of the condenser, the temperature sensor and the pressure sensor are positioned on a pipeline of the suction end of the refrigeration compressor, and the electronic liquid level sensor, the temperature sensor and the pressure sensor are all connected to the controller to drive the electronic expansion valve to control the opening degree of the electronic expansion valve.
The utility model adopts the structure, the initial opening of the electronic expansion valve is adjusted through the feedback signal of the electronic liquid level sensor at the condenser side, and the reasonable sinking lowest liquid level of the evaporator full liquid heat exchange area is indirectly maintained, so as to provide the liquid distribution quantity with a certain overspray proportion; and the working opening of the electronic expansion valve is further accurately adjusted by combining suction superheat signals fed back by a temperature sensor and a pressure sensor on a suction end pipeline of the refrigeration compressor so as to adapt to the liquid distribution variable quantity required by the unit in variable working condition operation. Therefore, the falling film heat exchange area of the evaporator always keeps uniform heat exchange, the phenomenon of local dry evaporation (no liquid film covering on the outer surface of the heat exchange tube) of the heat exchange tube bundle can not occur, and the risk of damage caused by liquid-carrying operation of a compressor due to abnormal rising of the liquid level can also not occur.
Compared with the prior art, the utility model, its beneficial effect is:
(1) can meet the requirements of heat exchange characteristics of a full liquid area and a falling film area of an evaporator at the same time.
(2) The uniform liquid distribution effect of the heat transfer tube bundle of the falling film evaporator is improved.
(3) The heat exchange area utilization rate of the falling film evaporator is improved.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
Fig. 1 is a schematic view of the device of the present invention.
Detailed Description
Referring to fig. 1, the liquid distribution amount adjusting device of the present invention includes a refrigeration compressor 11, a condenser 12, a drying filter 13, an electronic expansion valve 15, a falling film evaporator 16, and an air suction temperature sensor, which are connected in sequence to form a loop. The utility model discloses the device is still including the electron level sensor 14 that is located condenser 12 side to and be located temperature sensor 17 and pressure sensor 18 on the refrigerant compressor 11 suction end pipeline, electron level sensor 14, temperature sensor 17 and pressure sensor 18 all are connected to controller drive electronic expansion valve 15 and carry out aperture control to it.
When the device works, the initial opening of the electronic expansion valve 15 is adjusted through the relatively stable liquid level feedback signal measured by the electronic liquid level sensor 14, the falling film evaporator 16 is controlled to have a certain over-spraying proportion liquid distribution amount, and the sunk lowest liquid level of the full liquid heat exchange area of the falling film evaporator 16 is indirectly maintained; and then, combining with the suction superheat degree signal fed back by the temperature sensor 17 and the pressure sensor 18, the working opening of the electronic expansion valve 15 is accurately adjusted to adapt to the liquid distribution variable quantity required by the falling film evaporator 16 when the unit operates in a variable working condition, so that the falling film heat exchange area of the evaporator always keeps uniform and stable heat exchange.
The above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the present invention. It will be apparent to those skilled in the art that various changes and modifications can be made in the above embodiments without departing from the scope of the invention.
Claims (1)
1. The utility model provides a cloth liquid volume adjusting device for refrigeration falling film evaporator, it is including connecting gradually refrigeration compressor (11), condenser (12), drier-filter (13), electronic expansion valve (15), falling film evaporator (16) and the temperature sensor of breathing in that form the loop, its characterized in that, it still includes electronic level sensor (14), temperature sensor (17) and pressure sensor (18), electronic level sensor (14) are located condenser (12) side, temperature sensor (17) and pressure sensor (18) are located the pipeline of refrigeration compressor (11) end of breathing in, and electronic level sensor (14), temperature sensor (17) and pressure sensor (18) all are connected to controller drive electronic expansion valve (15) and carry out opening control to it.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022481665.2U CN213514337U (en) | 2020-11-02 | 2020-11-02 | Liquid distribution quantity adjusting device for refrigeration falling film evaporator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022481665.2U CN213514337U (en) | 2020-11-02 | 2020-11-02 | Liquid distribution quantity adjusting device for refrigeration falling film evaporator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213514337U true CN213514337U (en) | 2021-06-22 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022481665.2U Active CN213514337U (en) | 2020-11-02 | 2020-11-02 | Liquid distribution quantity adjusting device for refrigeration falling film evaporator |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213514337U (en) |
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2020
- 2020-11-02 CN CN202022481665.2U patent/CN213514337U/en active Active
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