CN203501523U - Film falling type screw rod water chilling unit - Google Patents
Film falling type screw rod water chilling unit Download PDFInfo
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- CN203501523U CN203501523U CN201320501062.1U CN201320501062U CN203501523U CN 203501523 U CN203501523 U CN 203501523U CN 201320501062 U CN201320501062 U CN 201320501062U CN 203501523 U CN203501523 U CN 203501523U
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- screw rod
- falling film
- condenser
- refrigerant
- water chilling
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Abstract
The utility model relates to a film falling type screw rod water chilling unit, which comprises a film falling evaporator, a semi-sealed screw rod compressor and a condenser, wherein an oil separator is built in the condenser, a refrigerant outlet of the film falling evaporator is connected with an inlet of the screw rod compressor through an air suction pipe, an outlet of the screw rod compressor is connected with an inlet of the condenser after passing through a check valve and a check valve, and a refrigerant outlet formed at the bottom of the condenser is connected with a refrigerant inlet of the film falling evaporator. The film falling type screw rod water chilling unit has the advantages that the heat transfer efficiency is improved, the evaporator heat exchange area and the coolant filling quantity are reduced, the oil return performance is good, the use cost is reduced, in addition, refrigerant R134a is used by the unit, and a better environment protection effect is realized. Meanwhile, through the arrangement of a gas-liquid separator, the interference of gas-liquid mixed refrigerants on the gas during the liquid distribution can be avoided, the operation of the unit can be more stable and more reliable, and the energy efficiency of the unit is improved.
Description
Technical field
The utility model relates to a kind of handpiece Water Chilling Units, especially a kind of screw-type water chiller, specifically a kind of falling film type screw rod handpiece Water Chilling Units.
Background technology
At present, current domestic bolt cold water unit is mainly dry type handpiece Water Chilling Units and full liquid handpiece Water Chilling Units.Dry type handpiece Water Chilling Units refrigerant charge is little, but efficiency is low, and full liquid cooling water unit efficiency is higher than dry type handpiece Water Chilling Units, but refrigerant charge increases greatly, and oil return poor performance, cold-producing medium is freon working medium, it destroys atmospheric ozone layer and has the effect that makes global warming.As the falling film type screw rod handpiece Water Chilling Units that combines above-mentioned two kinds of handpiece Water Chilling Units advantages, can when guaranteeing high energy efficiency, reduce the charging amount of cold-producing medium, reduce unit cost, the energy-efficient performance of elevator system, still, current falling film type screw rod handpiece Water Chilling Units ubiquity complex structure, difficulty of processing is large, and manufacturing cost is high, oil return unstable properties, use not environmental protection of cold-producing medium, have problems such as destroying atmospheric ozone layer.And the water conservancy diversion silk screen that evaporimeter adopts and porous aggregate easily enters refrigeration system and cause unit to break down.Because unit design is not considered the interference of gas to cold-producing medium cloth liquid, cause the cloth liquid of evaporimeter inner refrigerant inhomogeneous in addition, make heat exchanger tube two ends and mid portion easily occur dry-out, thereby reduced heat transfer efficiency and unit efficiency.
Summary of the invention
The purpose of this utility model is to provide a kind of the deficiencies in the prior art that overcome, simple in structure, the technical scheme of the falling film type handpiece Water Chilling Units that difficulty of processing is low.
The technical solution of the utility model is:
A falling film type screw rod handpiece Water Chilling Units, comprises the condenser of falling film evaporator, semi-enclosed helical-lobe compressor and built-in oil eliminator.The refrigerant outlet of described falling film evaporator is connected with the entrance of helical-lobe compressor by air intake duct; The outlet of helical-lobe compressor by check-valves with after stop valve, be connected with the entrance of condenser; The refrigerant outlet of condenser bottom passes through successively ball valve, the first device for drying and filtering, the first liquid-sighting glass and is connected with the refrigerant inlet of falling film evaporator after electric expansion valve; The oil export of described condenser sidepiece passes through, after the first oil return solenoid valve and the second liquid-sighting glass, to be connected with the high pressure entry of jet pump; The oil return opening of described falling film evaporator bottom passes through, after the first angle valve, the second device for drying and filtering, the second oil return solenoid valve and the 3rd liquid-sighting glass, to be connected with the low-pressure inlet of jet pump; Described injection delivery side of pump is connected with air intake duct.
Described falling film evaporator comprises housing, and is from top to bottom aligned in sequence with gas-liquid separation device, one-level distribution plate, secondary distribution plate, three grades of distribution plates and heat-exchanging tube bundle in enclosure interior; The two sides of described heat-exchanging tube bundle are provided with flow apron; On described each grade of distribution plate, be equipped with a plurality of apertures; The refrigerant inlet that described case top is provided with refrigerant outlet and is connected with gas-liquid separation device.
The aperture of the aperture on described distribution plate at different levels and hole count are all not identical.
Between described injection delivery side of pump and high pressure entry, be provided with bypass angle valve.
The beneficial effects of the utility model:
1, adopt falling film type evaporation technology, improved heat transfer efficiency, reduced evaporimeter heat exchange area and coolant injection amount, use environmental protection refrigerant R314a, can avoid the destruction to atmospheric ozone layer, improved unit operation efficiency, reduced use cost.
2, by gas-liquid separation device and three grades of distribution plates are set, avoided gas-liquid mixed refrigerant may be subject to the interference of gas when cloth liquid, make the operation of unit more steadily reliable; Unit efficiency value is higher.
3, adopt jet pump and oil return solenoid valve to control oil return technology, while having reduced oil return, liquid refrigerant does not evaporate and directly to the flowing of suction port of compressor, has improved falling film evaporator heat exchange efficiency, has improved unit efficiency value.
Accompanying drawing explanation
Fig. 1 is the utility model general structure schematic diagram.
Fig. 2 is the internal structure schematic diagram of falling film evaporator.
Fig. 3 is the axial symmetry generalized section of falling film evaporator.
Fig. 4 is one-level distribution plate structural representation in falling film evaporator.
Fig. 5 is the structural representation of secondary distribution plate in falling film evaporator.
Fig. 6 is the structural representation of three grades of distribution plates in falling film evaporator.
Wherein: 1-falling film evaporator; 2-helical-lobe compressor; 3-condenser; 4-electric expansion valve; 5-jet pump; 6-check-valves; 7-stop valve; 8-bypass angle valve; 9-the second liquid-sighting glass; 10-the first oil return solenoid valve; 11-the 3rd liquid-sighting glass; 12-the second oil return solenoid valve; 13-the second device for drying and filtering; 14-the first liquid-sighting glass; 15-the first angle valve; 16-the first device for drying and filtering; 17-ball valve; 18-housing; 19-gas-liquid separation device; 20-one-level distribution plate; 21-secondary distribution plate; Tri-grades of distribution plates of 22-; 23-flow apron; 24-refrigerant outlet; 25-refrigerant inlet; 26-oil return opening; 27-heat-exchanging tube bundle.
The specific embodiment
Below in conjunction with drawings and Examples, the utility model is further described.
As shown in Figure 1, the utility model comprises the condenser 3 of falling film evaporator 1, semi-enclosed helical-lobe compressor 2 and built-in oil eliminator.The refrigerant outlet 24 of described falling film evaporator 1 is connected with the entrance of helical-lobe compressor 2 by air intake duct; The outlet of helical-lobe compressor 2 is passed through, after check-valves 6 and stop valve 7, to be connected with the entrance of condenser 3; The refrigerant outlet of condenser 3 bottoms passes through successively ball valve 17, the first device for drying and filtering 16, the first liquid-sighting glass 14 and is connected with the refrigerant inlet 25 of falling film evaporator 1 after electric expansion valve 4; The oil export of described condenser 3 sidepieces passes through, after the first oil return solenoid valve 10 and the second liquid-sighting glass 9, to be connected with the high pressure entry of jet pump 5; The oil return opening 26 of described falling film evaporator 1 bottom passes through, after the first angle valve 15, the second device for drying and filtering 13, the second oil return solenoid valve 12 and the 3rd liquid-sighting glass 11, to be connected with the low-pressure inlet of jet pump 5.Wherein, the second oil return solenoid valve adopts and is interrupted oil return technology, and while having reduced oil return, liquid refrigerant does not evaporate and direct flowing to suction port of compressor.The outlet of described jet pump 5 is connected with air intake duct, and is provided with bypass angle valve 8 between the outlet of jet pump 5 and high pressure entry, can by the adjusting of bypass angle valve, control the flow of jet pump, makes the recirculating oil quantity of unit reach stable state.
As shown in Fig. 2 to 6, described falling film evaporator 1 comprises housing 18, and in housing 18 inside, be from top to bottom aligned in sequence with gas-liquid separation device 19, one-level distribution plate 20, secondary distribution plate 21, three grades of distribution plates 22 and heat-exchanging tube bundles 27; The two sides of described heat-exchanging tube bundle 27 are provided with flow apron 23; On described each grade of distribution plate, be equipped with a plurality of apertures.The aperture of the aperture on distribution plates at different levels and hole count are all not identical.One-level distributes plate hole to press rhombus layout, has a round in centre.Secondary distribution plate hole arranged crosswise, three grades of distribution plate hole matrix types are arranged.From one-level distribution plate to three grade distribution plate, the quantity in hole increases successively, and the diameter in hole reduces successively, between every grade of distribution plate, keeps at a certain distance away.The utility model does not re-use water conservancy diversion silk screen and porous aggregate.The refrigerant inlet 25 that described case top is provided with refrigerant outlet 24 and is connected with gas-liquid separation device 19.Described gas-liquid separation device 19 closed at both ends, lower end is connected with one-level distribution plate.The certain distance in interval between distribution plates at different levels.
The utility model operation principle is:
Under refrigeration mode, as shown in Figure 1, the higher pressure refrigerant gas of discharging from helical-lobe compressor 2 outlets enters after condenser 3 through check-valves 6 and stop valve 7, isolated refrigeration oil, after the high pressure entry of the first oil return solenoid valve 10, the second liquid-sighting glass 9 and jet pump 5, is got back to helical-lobe compressor 2.The high pressure refrigerant liquid of being discharged by condenser 3 outlet at bottoms enters the first device for drying and filtering 16 after ball valve 17, then by the first liquid-sighting glass 14, enters the refrigerant inlet 25 that enters falling film evaporator 1 after electric expansion valve 4 throttlings.After gas-liquid separation device 19, one to three grade of distribution plate, start to flash to refrigerant gas in heat-exchanging tube bundle 27 heat exchange.This refrigerant gas enters falling film evaporator 1 refrigerant outlet 24 after flow apron 23, and enters half envelope helical-lobe compressor 2 entrances by air intake duct.Small part low pressure refrigerant and refrigeration oil in falling film evaporator 1 housing 18, flowed out by oil return opening 26, and discontinuously after the first angle valve 15, the second filter 13, the second oil return solenoid valve 12 and the 3rd liquid-sighting glass 11, enter the injection low-pressure inlet of jet pump 5.Jet pump 5, by after low-pressure refrigeration oil and refrigerant mixed, flow back into helical-lobe compressor 2 by outlet, completes a kind of refrigeration cycle.During this time, can regulate the flow of controlling jet pump 5 by bypass angle valve 8.
The utility model does not relate to partly all prior aries that maybe can adopt same as the prior art to be realized.
Claims (4)
1. a falling film type screw rod handpiece Water Chilling Units, the condenser (3) that comprises falling film evaporator (1), semi-enclosed helical-lobe compressor (2) and built-in oil eliminator, is characterized in that the refrigerant outlet (24) of described falling film evaporator (1) is connected with the entrance of helical-lobe compressor (2) by air intake duct; The outlet of helical-lobe compressor (2) is connected with the entrance of condenser (3) with after stop valve (7) by check-valves (6); The refrigerant outlet of condenser (3) bottom is successively by being connected with the refrigerant inlet (25) of falling film evaporator (1) after ball valve (17), the first device for drying and filtering (16), the first liquid-sighting glass (14) and electric expansion valve (4); The oil export of described condenser (3) sidepiece passes through, after the first oil return solenoid valve (10) and the second liquid-sighting glass (9), to be connected with the high pressure entry of jet pump (5); The oil return opening (26) of described falling film evaporator (1) bottom passes through, after the first angle valve (15), the second device for drying and filtering (13), the second oil return solenoid valve (12) and the 3rd liquid-sighting glass (11), to be connected with the low-pressure inlet of jet pump (5); The outlet of described jet pump (5) is connected with air intake duct.
2. falling film type screw rod handpiece Water Chilling Units according to claim 1, it is characterized in that described falling film evaporator (1) comprises housing (18), and be from top to bottom aligned in sequence with gas-liquid separation device (19), one-level distribution plate (20), secondary distribution plate (21), three grades of distribution plates (22) and heat-exchanging tube bundle (27) in housing (18) inside; The two sides of described heat-exchanging tube bundle (27) are provided with flow apron (23); On described each grade of distribution plate, be equipped with a plurality of apertures; The refrigerant inlet (25) that described housing (18) top is provided with refrigerant outlet (24) and is connected with gas-liquid separation device (19).
3. falling film type screw rod handpiece Water Chilling Units according to claim 2, is characterized in that the aperture of the aperture on described distribution plate at different levels and hole count are all not identical.
4. falling film type screw rod handpiece Water Chilling Units according to claim 1, is characterized in that being provided with bypass angle valve (8) between the outlet of described jet pump (5) and high pressure entry.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320501062.1U CN203501523U (en) | 2013-08-16 | 2013-08-16 | Film falling type screw rod water chilling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320501062.1U CN203501523U (en) | 2013-08-16 | 2013-08-16 | Film falling type screw rod water chilling unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203501523U true CN203501523U (en) | 2014-03-26 |
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ID=50332499
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320501062.1U Expired - Lifetime CN203501523U (en) | 2013-08-16 | 2013-08-16 | Film falling type screw rod water chilling unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203501523U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104676934A (en) * | 2015-03-10 | 2015-06-03 | 南京冷德节能科技有限公司 | Double-stage falling film screw rod cold water/heat pump unit |
| CN104697225A (en) * | 2015-03-10 | 2015-06-10 | 南京冷德节能科技有限公司 | Falling film type water-cooled screw low-temperature solution unit |
| CN105091417A (en) * | 2014-04-24 | 2015-11-25 | 珠海格力电器股份有限公司 | Uniform distribution device, falling film evaporator and water chilling unit |
| CN107166813A (en) * | 2017-05-31 | 2017-09-15 | 珠海格力电器股份有限公司 | Liquid distributor |
| CN108759206A (en) * | 2018-06-15 | 2018-11-06 | 重庆美的通用制冷设备有限公司 | The purification method for controlling oil return of handpiece Water Chilling Units and handpiece Water Chilling Units |
-
2013
- 2013-08-16 CN CN201320501062.1U patent/CN203501523U/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105091417A (en) * | 2014-04-24 | 2015-11-25 | 珠海格力电器股份有限公司 | Uniform distribution device, falling film evaporator and water chilling unit |
| CN105091417B (en) * | 2014-04-24 | 2018-01-30 | 珠海格力电器股份有限公司 | Uniform distribution device, falling film evaporator and water chilling unit |
| CN104676934A (en) * | 2015-03-10 | 2015-06-03 | 南京冷德节能科技有限公司 | Double-stage falling film screw rod cold water/heat pump unit |
| CN104697225A (en) * | 2015-03-10 | 2015-06-10 | 南京冷德节能科技有限公司 | Falling film type water-cooled screw low-temperature solution unit |
| CN107166813A (en) * | 2017-05-31 | 2017-09-15 | 珠海格力电器股份有限公司 | Liquid distributor |
| CN107166813B (en) * | 2017-05-31 | 2023-08-15 | 珠海格力电器股份有限公司 | Liquid distributor |
| CN108759206A (en) * | 2018-06-15 | 2018-11-06 | 重庆美的通用制冷设备有限公司 | The purification method for controlling oil return of handpiece Water Chilling Units and handpiece Water Chilling Units |
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| GR01 | Patent grant | ||
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Granted publication date: 20140326 |