CN101514854A - Energy-saving type high-temperature water chilling unit - Google Patents
Energy-saving type high-temperature water chilling unit Download PDFInfo
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- CN101514854A CN101514854A CNA2009100954451A CN200910095445A CN101514854A CN 101514854 A CN101514854 A CN 101514854A CN A2009100954451 A CNA2009100954451 A CN A2009100954451A CN 200910095445 A CN200910095445 A CN 200910095445A CN 101514854 A CN101514854 A CN 101514854A
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Abstract
The invention discloses an energy-saving type high-temperature water chilling unit, comprising a compressor, an oil separator, a condensator, an electronic expansion valve and an evaporator which are connected in order to form a closed circuit. The oil separator has an input end and two output ends, the input end of the oil separator is connected with the output end of the compressor, one output end of the separator is connected with the input end of the condensator, the other output end is connected with the input end of the compressor, the evaporator is a full liquid type evaporator and also comprises an oil pressure lifting assembly. The invention adopts the full liquid type evaporator, the wall of the heat transfer tube is immerged in a coolant, the two-phase heat transmission has good efficiency and is free from the degree of superheat, the evaporation temperature can be increased by 3-5 DEG C under the same output water temperature. The oil pressure is lifted by the oil pressure lifting assembly, thus providing enough high-low pressure difference and guaranteeing the oil supply for the compressor. The oil balancing operation of the system is guaranteed by the oil separator and the safe and reliable operation of the water chilling unit can be guaranteed.
Description
[technical field]
The present invention relates to a kind of energy-saving type high-temperature handpiece Water Chilling Units.
[technical background]
From thermal comfort and health, require indoor temperature and humidity is controlled comprehensively.Summer, the human comfort district was 25 ℃, relative humidity 60%, and this moment, dew-point temperature was 16.6 ℃.The task of anthropogenic heat hydrofuge can be regarded as from 25 ℃ of environment to the external world and extract heat, under the environment of 16.6 ℃ dew-point temperatures to extraneous withdrawing moisture.At present the heat extraction hydrofuge of air conditioning mode is by aerial cooler air to be cooled off and dehumidification by condensation, the air of cool drying is sent into indoorly again, realizes the purpose of heat extraction hydrofuge.It is this that there are the following problems by air-conditioning regulative mode that air themperature and humidity are handled simultaneously.1. originally can adopt the heat that the high temperature low-temperature receiver drains but to handle, cause energy to utilize waste on the grade with shared 5 ~ 7 ℃ low temperature cold source of dehumidifying.2. the heat moisture ratio of building actual needs changes in the larger context, is difficult to adapt to the variation of heat moisture ratio, thereby humiture is difficult to accurately regulate simultaneously.3. the condenser coil surface grows mould and has a strong impact on a lot of problems such as indoor air quality.In sum, the needs of the widespread demand of air-conditioning, human settlement's health and the requirement of energy resource system balance have proposed challenge to present air conditioning mode.So introduce the theory of new humiture independence control air conditioner system, promptly adopt two to overlap independently that system controls and regulate indoor humidity and temperature respectively, thereby avoided the energy waste that the humiture Combined Treatment is brought in the conventional system and the reduction of air quality.The core of humiture independent regulation technology is exactly to control two parameter control of temperature and humidity are changed into by dry fresh air dehumidification, two means of 18 ℃ of high temperature cold water coolings by means of 7 ℃ cryogenic freezing water of original conventional air-conditioning system, so not only significantly improved the control accuracy of indoor temperature and humidity, improve the comprehensive Energy Efficiency Ratio of air-conditioning system, and greatly reduced the energy consumption of air-conditioning system.So under this design concept, no longer adopt 7 ℃ cold water of the requirement of satisfying cooling and dehumidifying simultaneously, but adopt about 18 ℃ cold water can satisfy the cooling requirement.
Conventional handpiece Water Chilling Units generally adopts injected compressor, adopts differential fuel feeding to be lubricated the oil circulation, the difference in functionality of, sealing lubricated to satisfy, guiding valve control and cooling., the oil circuit normal circulation directly affects the reliability service of compressor.Conventional handpiece Water Chilling Units is if will produce 16 ~ 18 ℃ high temperature cold water, evaporating pressure improves, the height pressure reduction of unit reduces, when particularly adopting the environmental protection refrigerant of R134a, pressure reduction only maintains about 0.48MPa under this moment declared working condition, when ambient temperature step-down slightly, condensing pressure descends thereupon, unit height pressure reduction may can not form normal oil circulation less than 0.4MPa, influences the normal operation of compressor.Height pressure reduction is too small on the other hand, also can influence the cold of expansion valve,, the heat transfer coefficient of evaporimeter and the heat transfer property of condenser etc.So conventional handpiece Water Chilling Units is produced 16 ~ 18 ℃ high temperature cold water, during unit operation a series of fault can appear. can't normally move.
[summary of the invention]
Purpose of the present invention is exactly to propose a kind of high temperature cold water that can produce 16 ~ 18 ℃ in order to solve problems of the prior art, and energy-saving type high-temperature handpiece Water Chilling Units that can safe and reliable operation.
For achieving the above object, the present invention proposes a kind of energy-saving type high-temperature handpiece Water Chilling Units, comprise the compressor that connects successively and form the closed-loop path, oil eliminator, condenser, electric expansion valve, evaporimeter, described oil eliminator has an input and two outputs, the input of oil eliminator is connected to the output of compressor, an output of separator is connected to the input of condenser, another output is connected to the input of compressor, described evaporimeter is a flooded evaporator, also comprises the oil pressure lifting subassembly that is arranged on the outside of compressor and is connected with compressor.
As preferably, described oil pressure lifting subassembly comprises oil pump, and an end of described oil pump is connected to the input of compressor, and the other end is connected to the output of compressor.
As preferably, also be in series with first check valve on the described oil pump.
As preferably, described oil pressure lifting subassembly also comprises the gate gurgle valve in parallel with oil pump, and the two ends of described gate gurgle valve also are parallel with second check valve.
As preferably, be provided with first filter and the magnetic valve of connecting between the output of described oil eliminator and the suction side of compressor.
As preferably, described compressor is the less compressor of interior volume specific ratio.
As preferably, described compressor adopts screw compressor.
As preferably, also be provided with second filter of connecting between described condenser and the evaporimeter with electric expansion valve.
As preferably, also be provided with pressure sensor on described evaporimeter and the condenser.
As preferably, the connecting line of described compressor and oil eliminator is provided with temperature sensor.
The beneficial effect of patent of the present invention: the present invention adopts flooded evaporator, and the heat-transfer pipe tube wall is fully by the submergence of liquid refrigerants institute, the restriction that the preferable two-phase of efficient is conducted heat and is not subjected to the degree of superheat, and evaporating temperature can improve 3 ~ 5 ℃ under the identical leaving water temperature situation.Promote oil pressure by the oil pressure lifting subassembly, enough height pressure reduction is provided, guarantee the fuel feeding of compressor.Handle Oil-gas Separation, oil return and lubricating oil management well by oil eliminator, keep the oily balance movement of system.This energy-saving type high-temperature handpiece Water Chilling Units can be produced out 16 ~ 18 ℃ high temperature cold water, and can safe and reliable operation.
[description of drawings]
Fig. 1 is the structural representation of a kind of energy-saving type high-temperature handpiece Water Chilling Units of the present invention.
[specific embodiment]
Consult Fig. 1, the energy-saving type high-temperature handpiece Water Chilling Units, comprise the compressor 4, oil eliminator 1, condenser 15, the evaporimeter 11 that connect successively and form the closed-loop path, described oil eliminator 1 has an input and two outputs, the input of oil eliminator 1 is connected to the output of compressor 4, an output of separator 1 is connected to the input of condenser 15, another output is connected to the input of compressor 4, described evaporimeter 11 is a flooded evaporator, also comprises the oil pressure lifting subassembly that is arranged on the outside of compressor 4 and is connected with compressor 4.Described oil pressure lifting subassembly comprises oil pump 9, and an end of described oil pump 9 is connected to the input of compressor 4, and the other end is connected to the output of compressor 4.Also be in series with first check valve 7 on the described oil pump 9.Described oil pressure lifting subassembly also comprises the gate gurgle valve 3 in parallel with oil pump 9, and the two ends of described gate gurgle valve 3 also are parallel with second check valve 16.Be provided with first filter 5 and the magnetic valve 6 of connecting between the suction side of the output of described oil eliminator 1 and compressor 4.Described compressor 4 is the less compressor of interior volume specific ratio.Described compressor 4 adopts screw compressor.Be provided with second filter 14 and the electric expansion valve 12 of connecting between described condenser 15 and the evaporimeter 11.Described evaporimeter 11 is provided with pressure sensor 10.Described compressor 4 is provided with temperature sensor 2 with the connecting line of oil eliminator 1.
Being compressed discharge in compressor 4 after, cold-producing medium enters external secondary oil separator 1, change gas flow by adopting, reduce gas flow rate, the method that the machinery separation combines is with lubricating oil separation, isolated lubricating oil is through filter 5, magnetic valve 6, the suction side that first form 8 sprays back compressor 4, and cold media gas enters condenser 15 condensations, filter through second filter 14 after being condensed into liquid, become gas-liquid two-phase through cold-producing medium after the electric expansion valve 12 throttling step-downs and enter evaporimeter 11 from the second filter 14 back cold-producing medium that comes out, cold-producing medium carries out heat exchange with chilled water therein, absorb heat of vaporization, produce the high temperature chilled water, become gaseous state after the cold-producing medium heat absorption and enter compressor 4 compressions, circulation is carried out.Also comprise second form 13 among the figure.
Two oil circuit interfaces are arranged on the described compressor 4, one-in-and-one-out,, promptly oil piping system adds external pipeline and promotes charge oil pressure by auxilliary.Wherein the import of flowline and oil pump 9 is joined, and the outlet of oil return pipe and oil pump 9 is joined, and in parallel with oil pump have second check valve 16 and a gate gurgle valve 3.Behind unit starting, drive oil pump 9 immediately, promptly utilize oil pump 9 that the lubricating oil forced conveyance is lubricated to each oil site, compressor 4 can normally move when height pressure reduction is low to satisfy.Unit starting finishes the duty of rear pump or output pump 9 to be controlled according to suction and discharge pressure reduction, if pressure at expulsion is with the pressure of inspiration(Pi) difference during less than the bottom line value, and oil pump 9 unlatchings, on the contrary then oil pump 9 cuts out.This moment oil directly flows to import by the compressor oil way outlet without oil pump 9, and when oil pump 9 inlet outlet pressure differential switches during greater than a certain value, oil pump outlet oil goes back to bypass to the suction side, in order to avoid the oil circulation amount is excessive compressor 4 is moved and causes harmful effect.The oil pump outlet is installed first check valve 7 and is prevented to produce counter-rotating when oil pump 9 from shutting down, and prevents the lubricating oil migration.
For realizing purpose of the present invention, present embodiment has mainly adopted following mode, and these modes are safeguards system reliability of operation to a certain extent separately, is not all to make up the reliability that could improve system.The first, adopt flooded evaporator, the heat-transfer pipe tube wall is fully by the submergence of liquid refrigerants institute, the restriction that the preferable two-phase of efficient is conducted heat and is not subjected to the degree of superheat, and evaporating temperature can improve 3 ~ 5 ℃ under the identical leaving water temperature situation.Thereby improve the heat transfer coefficient of evaporimeter, improve unit performance.The second, achieve the goal by the performance of improving compressor.Choose the less compressor of interior volume specific ratio as far as possible, prevent the power loss that overcompression causes.Such as for the screw unit, need choose the less Rotary Compressor of interior volume specific ratio as far as possible, also can adopt screw compressor with adaptive characteristic.Three, by external oil pump oil pressure is promoted, enough charge oil pressures are provided, control height pressure reduction makes lubricating oil have enough power to be lubricated work within suitable scope.Four, handle the management of Oil-gas Separation, oil return and lubricating oil well, by complete air-breathing concentrated oil return, stop and the liquid refrigerant of evaporation section in air-breathing, heating concentrates oil droplet and the oil content oil return in air-breathing, keeps the oily balance movement of system.By the rectification to system aspects, thereby assurance high temperature cold water unit can be produced 16 ~ 18 ℃ high temperature cold water, satisfies outdoor interior cooling requirement.
The foregoing description is to explanation of the present invention, is not limitation of the invention, any scheme after the simple transformation of the present invention is all belonged to protection scope of the present invention.
Claims (10)
1. energy-saving type high-temperature handpiece Water Chilling Units, it is characterized in that: comprise the compressor (4) that connects successively and form the closed-loop path, oil eliminator (1), condenser (15), electric expansion valve (12), evaporimeter (11), described oil eliminator (1) has an input and two outputs, the input of oil eliminator (1) is connected to the output of compressor (4), an output of separator (1) is connected to the input of condenser (15), another output is connected to the input of compressor (4), described evaporimeter (11) is a flooded evaporator, also comprises the oil pressure lifting subassembly that is arranged on the outside of compressor (4) and is connected with compressor (4).
2. a kind of energy-saving type high-temperature handpiece Water Chilling Units as claimed in claim 1 is characterized in that: described oil pressure lifting subassembly comprises oil pump (9), and an end of described oil pump (9) is connected to the input of compressor (4), and the other end is connected to the output of compressor (4).
3. a kind of energy-saving type high-temperature handpiece Water Chilling Units as claimed in claim 2 is characterized in that: also be in series with first check valve (7) on the described oil pump (9).
4. a kind of energy-saving type high-temperature handpiece Water Chilling Units as claimed in claim 3 is characterized in that: described oil pressure lifting subassembly also comprises the gate gurgle valve (3) in parallel with oil pump (9), and the two ends of described gate gurgle valve (3) also are parallel with second check valve (16).
5. a kind of energy-saving type high-temperature handpiece Water Chilling Units as claimed in claim 1 is characterized in that: be provided with first filter (5) and the magnetic valve (6) of connecting between the output of described oil eliminator (1) and the suction side of compressor (4).
6. a kind of energy-saving type high-temperature handpiece Water Chilling Units as claimed in claim 1 is characterized in that: described compressor (4) is the less compressor of interior volume specific ratio.
7. a kind of energy-saving type high-temperature handpiece Water Chilling Units as claimed in claim 6 is characterized in that: described compressor (4) adopts screw compressor.
8. a kind of energy-saving type high-temperature handpiece Water Chilling Units as claimed in claim 1 is characterized in that: also be provided with second filter (14) of connecting with electric expansion valve (12) between described condenser (15) and the evaporimeter (11).
9. a kind of energy-saving type high-temperature handpiece Water Chilling Units as claimed in claim 1 is characterized in that: also be provided with pressure sensor (10) on described evaporimeter (11) and the condenser (15).
10. as any one described a kind of energy-saving type high-temperature handpiece Water Chilling Units in the claim 1 to 9, it is characterized in that: described compressor (4) is provided with temperature sensor (2) with the connecting line of oil eliminator (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100954451A CN101514854A (en) | 2009-01-13 | 2009-01-13 | Energy-saving type high-temperature water chilling unit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA2009100954451A CN101514854A (en) | 2009-01-13 | 2009-01-13 | Energy-saving type high-temperature water chilling unit |
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| CN101514854A true CN101514854A (en) | 2009-08-26 |
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| CNA2009100954451A Pending CN101514854A (en) | 2009-01-13 | 2009-01-13 | Energy-saving type high-temperature water chilling unit |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949618A (en) * | 2010-10-08 | 2011-01-19 | 浙江盾安人工环境股份有限公司 | Refrigerant switching sewage-source heat pump system |
| CN102281742A (en) * | 2011-07-01 | 2011-12-14 | 新疆金风科技股份有限公司 | Closed cabinet body cooling system and wind generating set |
| CN104089347A (en) * | 2014-06-24 | 2014-10-08 | 广东申菱空调设备有限公司 | Low-temperature air-cooled water chiller unit and control method thereof |
| CN104422198A (en) * | 2013-08-20 | 2015-03-18 | 珠海格力电器股份有限公司 | Compressor and control method of oil pump thereof |
| CN112460865A (en) * | 2020-12-07 | 2021-03-09 | 珠海格力电器股份有限公司 | Refrigeration oil self-circulation heating device, control method thereof and water chilling unit |
| CN112665222A (en) * | 2020-12-16 | 2021-04-16 | 珠海格力电器股份有限公司 | Refrigeration system and oil supply control method, device and controller thereof |
| CN113294940A (en) * | 2020-02-21 | 2021-08-24 | 浙江盾安机电科技有限公司 | Shell-tube heat exchanger |
| CN114353371A (en) * | 2022-01-24 | 2022-04-15 | 珠海格力电器股份有限公司 | Four-pipe system and control method |
-
2009
- 2009-01-13 CN CNA2009100954451A patent/CN101514854A/en active Pending
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101949618A (en) * | 2010-10-08 | 2011-01-19 | 浙江盾安人工环境股份有限公司 | Refrigerant switching sewage-source heat pump system |
| CN102281742A (en) * | 2011-07-01 | 2011-12-14 | 新疆金风科技股份有限公司 | Closed cabinet body cooling system and wind generating set |
| CN104422198A (en) * | 2013-08-20 | 2015-03-18 | 珠海格力电器股份有限公司 | Compressor and control method of oil pump thereof |
| CN104089347A (en) * | 2014-06-24 | 2014-10-08 | 广东申菱空调设备有限公司 | Low-temperature air-cooled water chiller unit and control method thereof |
| CN113294940A (en) * | 2020-02-21 | 2021-08-24 | 浙江盾安机电科技有限公司 | Shell-tube heat exchanger |
| CN112460865A (en) * | 2020-12-07 | 2021-03-09 | 珠海格力电器股份有限公司 | Refrigeration oil self-circulation heating device, control method thereof and water chilling unit |
| CN112665222A (en) * | 2020-12-16 | 2021-04-16 | 珠海格力电器股份有限公司 | Refrigeration system and oil supply control method, device and controller thereof |
| CN114353371A (en) * | 2022-01-24 | 2022-04-15 | 珠海格力电器股份有限公司 | Four-pipe system and control method |
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Open date: 20090826 |