CN202188703U - Air-cooling spillover type cold water machine set - Google Patents
Air-cooling spillover type cold water machine set Download PDFInfo
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- CN202188703U CN202188703U CN2011202039830U CN201120203983U CN202188703U CN 202188703 U CN202188703 U CN 202188703U CN 2011202039830 U CN2011202039830 U CN 2011202039830U CN 201120203983 U CN201120203983 U CN 201120203983U CN 202188703 U CN202188703 U CN 202188703U
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Abstract
The utility model discloses an air-cooling spillover type cold water machine set, which belongs to the technical field of refrigerating and air-conditioning equipment. The existing cold water air-conditioning machine set is low in energy efficiency under normal working conditions. The air-cooling spillover type cold water machine set is connected with a compressor, an oil separator, a condenser, a throttling device and an evaporator which are all arranged in a refrigerating fluid circulation loop. The evaporator is a spillover type shell-tube heat exchanger, and a system oil return pipeline is further connected onto the refrigerating fluid circulation loop. The system oil return pipeline comprises an evaporator injection oil return pipeline and an oil content oil return pipeline, wherein the evaporator injection oil return pipeline is composed of an injection pump, a first regulating valve, a second regulating valve and a pipeline, and the oil content oil return pipeline is composed of a third regulating valve, a filter and a pipeline. Therefore, the air-cooling spillover type cold water machine set can reach coefficient of performance (COP) above 3.4 and is reasonable in cost, reliable in performance and high in implementation value.
Description
Technical field
The utility model belongs to the Refrigeration & Air-Conditioning equipment technical field, is specifically related to a kind of air-cooled flooded type handpiece Water Chilling Units.
Background technology
Along with the raising day by day of national economic development, people's lives, domestic air-conditioning installed capacity is day by day surging, and the prosperity of air-conditioning industry is when founding comfortable life for people, and the following energy is highly consumed.According to statistics, the air conditioning energy consumption of the general hotel of China, office building accounts for 30～40% of building energy consumption, and the air conditioning energy consumption in big-and-middle-sized market is then up to 50%, so the energy-saving and emission-reduction of HVAC have become the urgent day by day problem that solves.
Present wind-cooled cold-water air-conditioning unit water-side heat is commonly traditional dry evaporator (as shown in Figure 1), and water is walked shell side, and cold-producing medium is walked tube side.Cold-producing medium absorbs water side heat when in pipe, flowing and evaporates, and becomes gaseous state by saturated liquid state, and flow velocity constantly increases, and causes the bigger pressure loss thus; Outlet simultaneously needs enough degrees of superheat not to be with liquid to guarantee compressor, and the existence of single-phase overheated zone has reduced the effective rate of utilization of heat exchange area, has weakened the whole coefficient of heat transfer.At shell side, though flowing around deflection plate, water strengthened heat exchange, the restriction that hydraulic pressure falls causes and can not fully increase water flow velocity and improve the water side coefficient of heat transfer.This dry evaporator, though in recent years through using thermoexcell and the miniaturization of evaporimeter caliber to improve heat exchange, promote limited and the heat transfer coefficient radix still on the low side.
In the wind-cooled cold-water air-conditioning unit; Current water-side heat is mainly dry evaporator; The air side condenser then is a copper aluminium finned heat exchanger; Basically about 3.0, COP can reach the unit phoenix feathers and unicorn horns of national energy-conservation one-level efficiency 3.4 to Energy Efficiency Ratio COP under disposing like this under the unit nominal condition, and COP is higher than 3.4 has then become a kind of technical bottleneck.Promptly enabling to reach this target, be under high design cost supports, could realize, and this low input-output ratio in the today of pursuing the sustainable development maximizing the benefits, has not obviously worthed promotion and implementation yet.
Summary of the invention
The technical problem that the utility model will solve and the technical assignment of proposition are to overcome the existing lower defective of the Energy Efficiency Ratio of wind-cooled cold-water air-conditioning unit under nominal condition, and a kind of air-cooled flooded type handpiece Water Chilling Units is provided.
For achieving the above object; The air-cooled flooded type handpiece Water Chilling Units of the utility model; It comprises compressor, oil eliminator, condenser, throttling arrangement, the evaporimeter that is connected in the refrigerant circulation loop, it is characterized in that: described condenser is an air-cooled condenser, and described evaporimeter is the flooded type case tube heat exchanger; Also be connected with the system oil return pipeline on the described refrigerant circulation loop; Described system oil return pipeline comprises evaporimeter injection return line and oil content return line, and described evaporimeter injection return line is made up of jet pump, control valve one, control valve two and pipeline, and described oil content return line is made up of control valve three, filter and pipeline.
As the optimization technique measure; Described jet pump has three connectivity ports; A connectivity port connects the refrigerant circulation loop between said compressor and the evaporimeter by the road; Another connectivity port connects the refrigerant circulation loop between said compressor and the oil eliminator through described control valve one, pipeline, and the 3rd connectivity port connects described evaporimeter with from described evaporimeter injection cold-producing medium through described control valve two, pipeline.
As the optimization technique measure, described control valve three is connected with filter by the road and through pipeline described control valve three, filter is connected between described compressor and the oil eliminator.
As the optimization technique measure, described air-cooled condenser is micropassage type flat pipe heat exchanger or copper aluminium finned heat exchanger.
As the optimization technique measure, described throttling arrangement is by the major-minor orifice plate of changeable flow combination or is electric expansion valve.
As the optimization technique measure, the liquid way solenoid valve is installed in the described refrigerant circulation loop.
The utility model, water-side heat have adopted efficient flooded type evaporimeter, and it flows to differently fully with dry evaporator, and chilled water is walked tube side, and pressure drop is little, and water flow velocity can obviously improve and comes enhanced heat exchange; And water flows is inboard in pipe, and incrustation scale cleans easily.Cold-producing medium is then walked shell side, and heat exchanger tube moistens in the liquid refrigerant that is immersed in boiling fully, and compressor directly sucks saturated moist steam, and the big pressure drop of refrigerant mass fluxes is little, and overall heat-transfer coefficient is more than three times of dry evaporator, can significantly improve unit eer thus.
The utility model; The air-cooled condenser device adopts efficient micro-channel heat exchanger; This is a kind of close-coupled cross-flow heat exchanger that uses micro-channel flat and louvered fin, in air conditioning for automobiles, has used more than 20 years, compares with copper aluminium finned heat exchanger; It has significant advantages such as heat transfer efficiency is higher, the heat exchanger size is little, in light weight, refrigerant charge is little, and therefore this is a kind of desirable selection in the air-cooled condenser design of high-efficiency air-condition unit.
The utility model, throttling arrangement adopt the major-minor orifice plate of changeable flow combination or are electric expansion valve.The electric expansion valve throttling is high-grade configuration, and orifice plate is a kind of inexpensive and reliable restricting element, and just its Flow-rate adjustment ability is very limited.For this reason, the present invention adopts the major-minor orifice plate throttling of changeable flow, has solved the deficiency that the single orifice plate throttling exists.In the major-minor orifice plate throttling scheme; Main aperture plate 14 is born 70% flow system flow; And auxilliary orifice plate 16 is born 30% flow system flow, and auxilliary orifice plate throttling output can come further refinement Flow-rate adjustment fully by auxilliary orifice plate magnetic valve 15 controls through the make-and-break time of regulating magnetic valve when reality is used.
Generally there is the difficult unit reliability problem that influences of system oil return in the flooded type unit; Adopt the pressure reduction oil return of oil content and dual fail-safe design that the oil return of evaporimeter injection combines in this programme; The shutoff magnetic valve is set in the liquid road simultaneously; Be not with liquid when guaranteeing unit starting, thereby promoted the reliability of system greatly.
The beneficial effect of the utility model is: unit COP is reached more than 3.4, and cost is reasonable, dependable performance has much implementary value.
Description of drawings
Fig. 1 is a conventional dry evaporation structure sketch map.
Fig. 2 is a flooded type evaporation structure sketch map.
Fig. 3 is air-cooled flooded type handpiece Water Chilling Units refrigeration principle key diagram.
Fig. 4 is the refrigeration system general flow chart of air-cooled flooded type handpiece Water Chilling Units configuration orifice plate throttling.
Fig. 5 is the refrigeration system general flow chart of air-cooled flooded type handpiece Water Chilling Units configuration electric expansion valve throttling.
Label declaration among the figure: 1-compressor, 2-oil eliminator, 3-condenser, 4-throttling arrangement, 5-evaporimeter, 6-liquid way solenoid valve, 7-device for drying and filtering; The 8-stop valve, 9-control valve two, 10-jet pump, 11-control valve one, 12-control valve three, 13-filter; 14-main aperture plate, 15-assists the orifice plate magnetic valve, and 16-assists orifice plate, 17-liquid reservoir, 18-water inlet, 19-delivery port; The 20-heat exchanger tube, 21-refrigerant inlet, 22-refrigerant outlet, 23-deflection plate, 24-distributor, 25-shell.
The specific embodiment
Below in conjunction with Figure of description the utility model is further specified.
The air-cooled flooded type handpiece Water Chilling Units of the utility model; Like Fig. 4, shown in 5, it comprises the compressor 1 that is connected in the refrigerant circulation loop, oil eliminator 2, condenser 3, throttling arrangement 4, evaporimeter 5; Condenser 3 is an air-cooled condenser; Evaporimeter 5 is flooded type case tube heat exchanger (concrete structure is as shown in Figure 2, and its water inlet, delivery port can set up separately and the shell two ends, also can be located at the same end of shell jointly); Also be connected with the system oil return pipeline on the refrigerant circulation loop; The system oil return pipeline comprises evaporimeter injection return line and oil content return line, and evaporimeter injection return line is made up of jet pump 10, control valve 1, control valve 29 and pipeline, and the oil content return line is made up of control valve 3 12, filter 13 and pipeline.
As shown in Figure 3; Air-cooled flooded type handpiece Water Chilling Units refrigeration system operation principle is: compressor 1 sucks the low-temperature low-pressure refrigerant saturated vapor of flash-pot 5, to becoming the superheated vapor of HTHP after its compression work done, then it is entered oil eliminator 2 and carries out Oil-gas Separation; The after separating heat steam gets into air-cooled condenser again; Through the forced ventilation of blower fan, the surrounding air lower with temperature carries out heat exchange, makes gaseous refrigerant be condensed into highly pressurised liquid.Highly pressurised liquid becomes low-temp low-pressure and the higher gas-fluid two-phase mixture of content liquid after throttling arrangement 4 throttling step-downs, then get into evaporimeter 5.In evaporimeter 5, become the low-temperature low-pressure refrigerant steam behind the heat of the cold-producing medium absorption refrigerating water of low-temp low-pressure, temperature decline reached the refrigeration purpose after chilled water then was cooled.Cold-producing medium damp steam after the gasification is inhaled into compressor again, so reciprocation cycle.
As further improving and replenishing to technique scheme; The utility model also comprises following additional technical characterictic; The major part below though Fig. 4,5 has optionally comprised in all additional technical features; Be the preferred embodiment of the utility model, but the utility model is not limited to this situation, when implementing the utility model, they is selected for use on the described technical scheme of epimere according to specifically acting on.
At first; Jet pump 10 has three connectivity ports; A connectivity port connects the refrigerant circulation loop between compressor 1 and the evaporimeter 5 by the road; Another connectivity port connects the refrigerant circulation loop between compressor 1 and the oil eliminator 2 through control valve 1, pipeline, the 3rd connectivity port through control valve 29, pipeline connection evaporimeter 5 with from evaporimeter 5 injection cold-producing mediums.
Secondly, control valve 3 12 is connected with filter 13 by the road and through pipeline control valve 3 12, filter 13 is connected between compressor 1 and the oil eliminator 2.
Three, air-cooled condenser is micropassage type flat pipe heat exchanger or copper aluminium finned heat exchanger.
The 4th, throttling arrangement 4 is by the major-minor orifice plate of changeable flow combination or is electric expansion valve.
The 5th, liquid way solenoid valve 6 is installed in the refrigerant circulation loop.
Below through two embodiment the utility model is further specified.
Embodiment 1:
As shown in Figure 4; What it adopted is a kind of air-cooled flooded type handpiece Water Chilling Units of orifice plate throttling; By compressor 1, oil eliminator 2, air-cooled condenser 3 (micro-channel heat exchanger), liquid reservoir 17, stop valve 8, device for drying and filtering 7, liquid way solenoid valve 6, main aperture plate 14, auxilliary orifice plate magnetic valve 15, auxilliary orifice plate 16, flooded type evaporimeter 5; And the system oil return pipeline is formed main aperture plate 14, auxilliary orifice plate magnetic valve 15, auxilliary orifice plate 16 formation throttling arrangements 4.The main oil return of unit is after isolating refrigeration oil through oil content; The height pressure reduction of dependence system; The oil return branch road of forming through valve 12 and filter 13 is back in the compressor, and the oil pump capacity of oil content can rely on control valve 3 12 to regulate, and oil return can prevent that through filter process impurity from getting into compressor.Oil in the unit evaporimeter then is to rely on gases at high pressure pump injection mode to solve; The gases at high pressure of drawing from gas exhaust piping are after control valve 1 is regulated; Flow in the jet pump 10 at a high speed, produce powerful injection power, on oil-enriched layer sucking-off guiding suction side low-voltage tube in the evaporimeter.The injection recirculating oil quantity can be through regulating the adjustment of control valve 29 apertures.Magnetic valve 6 in that main fluid path is installed automatically shuts down when compressor emergency shutdown, prevents that too much liquid refrigerants from flowing into evaporimeter 5, guarantees the clean boot of unit operation next time with this.
In this programme, throttling arrangement is the major-minor orifice plate of changeable flow combination, and this is a kind of very economic and practical scheme.Main aperture plate 14 is born 70% flow system flow, and auxilliary orifice plate 16 is born 30% flow system flow, and auxilliary orifice plate throttling output is fully by auxilliary orifice plate magnetic valve 15 controls.When full-load run, major-minor orifice plate is all dropped into, for system provides maximum stream flow; When minimum load, then close auxilliary orifice plate magnetic valve, by an amount of cold medium flux of main aperture Plate supplying; At the shoulder load state, then control the flow output of auxilliary orifice plate, and then satisfy the required traffic requirement of system through the make-and-break time of regulating magnetic valve.
Embodiment 2:
As shown in Figure 5; What embodiment adopted is a kind of air-cooled flooded type handpiece Water Chilling Units of electric expansion valve throttling; By compressor 1, oil eliminator 2, air-cooled condenser 3 (micro-channel heat exchanger), liquid reservoir 17, stop valve 8, device for drying and filtering 7, throttling arrangement (electric expansion valve) 4, flooded type evaporimeter 5, and the system oil return pipeline is formed.The main oil return of unit is after isolating refrigeration oil through oil content; The height pressure reduction of dependence system; The oil return branch road of forming through control valve 3 12 and filter 13 is back in the compressor, and the oil pump capacity of oil content can rely on control valve 3 12 to regulate, and oil return can prevent that through filter process impurity from getting into compressor.Oil in the unit evaporimeter then is to rely on gases at high pressure pump injection mode to solve; The gases at high pressure of drawing from gas exhaust piping are after control valve 1 is regulated; Flow in the jet pump 10 at a high speed, produce powerful injection power, on oil-enriched layer sucking-off guiding suction side low-voltage tube in the evaporimeter.The injection recirculating oil quantity can be through regulating the adjustment of control valve 29 apertures.Throttling arrangement adopts electric expansion valve, and the system of can be provides more accurate flow, when compressor emergency shutdown, electric expansion valve is closed fully, cuts off liquid refrigerants and flows into flooded type evaporimeter 5, guarantees the clean boot of unit operation next time with this.
Claims (6)
1. air-cooled flooded type handpiece Water Chilling Units; It comprises compressor (1), oil eliminator (2), condenser (3), throttling arrangement (4), the evaporimeter (5) that is connected in the refrigerant circulation loop; It is characterized in that: described condenser (3) is an air-cooled condenser; Described evaporimeter (5) is the flooded type case tube heat exchanger; Also be connected with the system oil return pipeline on the described refrigerant circulation loop; Described system oil return pipeline comprises evaporimeter injection return line and oil content return line, and described evaporimeter injection return line is made up of jet pump (10), control valve one (11), control valve two (9) and pipeline, and described oil content return line is made up of control valve three (12), filter (13) and pipeline.
2. air-cooled flooded type handpiece Water Chilling Units according to claim 1; It is characterized in that: described jet pump (10) has three connectivity ports; A connectivity port connects the refrigerant circulation loop between said compressor (1) and the evaporimeter (5) by the road; Another connectivity port connects the refrigerant circulation loop between said compressor (1) and the oil eliminator (2) through described control valve one (11), pipeline, and the 3rd connectivity port connects described evaporimeter (5) with from described evaporimeter (5) injection cold-producing medium through described control valve two (9), pipeline.
3. air-cooled flooded type handpiece Water Chilling Units according to claim 1 is characterized in that: described control valve three (12) is connected with filter (13) by the road and through pipeline described control valve three (12), filter (13) is connected between described compressor (1) and the oil eliminator (2).
4. air-cooled flooded type handpiece Water Chilling Units according to claim 1 is characterized in that: described air-cooled condenser is micropassage type flat pipe heat exchanger or copper aluminium finned heat exchanger.
5. air-cooled flooded type handpiece Water Chilling Units according to claim 1 is characterized in that: described throttling arrangement is by the major-minor orifice plate of changeable flow combination or is electric expansion valve.
6. air-cooled flooded type handpiece Water Chilling Units according to claim 1 is characterized in that: liquid way solenoid valve (6) is installed in the described refrigerant circulation loop.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202039830U CN202188703U (en) | 2011-06-16 | 2011-06-16 | Air-cooling spillover type cold water machine set |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011202039830U CN202188703U (en) | 2011-06-16 | 2011-06-16 | Air-cooling spillover type cold water machine set |
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| Publication Number | Publication Date |
|---|---|
| CN202188703U true CN202188703U (en) | 2012-04-11 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011202039830U Expired - Lifetime CN202188703U (en) | 2011-06-16 | 2011-06-16 | Air-cooling spillover type cold water machine set |
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| CN (1) | CN202188703U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662815A (en) * | 2018-06-04 | 2018-10-16 | 珠海格力电器股份有限公司 | Oil return circuit system, refrigeration unit and the oil circuit switching method of refrigeration unit |
| CN117647033A (en) * | 2024-01-29 | 2024-03-05 | 荏原冷热系统（中国）有限公司 | Injection oil return control method |
-
2011
- 2011-06-16 CN CN2011202039830U patent/CN202188703U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108662815A (en) * | 2018-06-04 | 2018-10-16 | 珠海格力电器股份有限公司 | Oil return circuit system, refrigeration unit and the oil circuit switching method of refrigeration unit |
| CN108662815B (en) * | 2018-06-04 | 2023-07-04 | 珠海格力电器股份有限公司 | Oil return way system of refrigerating unit, refrigerating unit and oil way switching method |
| CN117647033A (en) * | 2024-01-29 | 2024-03-05 | 荏原冷热系统（中国）有限公司 | Injection oil return control method |
| CN117647033B (en) * | 2024-01-29 | 2024-04-02 | 荏原冷热系统（中国）有限公司 | Injection oil return control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: ZHEJIANG KING AIR CONDITIONER CO., LTD. Free format text: FORMER NAME: ZHEJIANG KING AIR CONDITIONING EQUIPMENT CO., LTD. |
|
| CP03 | Change of name, title or address |
Address after: 312300 Zhejiang city of Shaoxing province Shangyu city street high road No. 18 Patentee after: Zhejiang Guo Xiang air-conditioning limited company Address before: City Economic Development Zone Street gongxingcun 312300 Zhejiang city of Shaoxing province Shangyu City Patentee before: Zhejiang Guo Xiang Air Conditioner Equipment Co., Ltd |
|
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 312300 Zhejiang city of Shaoxing province Shangyu city street high road No. 18 Patentee after: Zhejiang state auspicious Limited by Share Ltd Address before: 312300 Zhejiang city of Shaoxing province Shangyu city street high road No. 18 Patentee before: Zhejiang Guo Xiang air-conditioning limited company |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20120411 |