CN204254921U - The low-temperature cold water unit structure of single machine two-stage - Google Patents
The low-temperature cold water unit structure of single machine two-stage Download PDFInfo
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- CN204254921U CN204254921U CN201420545296.0U CN201420545296U CN204254921U CN 204254921 U CN204254921 U CN 204254921U CN 201420545296 U CN201420545296 U CN 201420545296U CN 204254921 U CN204254921 U CN 204254921U
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Abstract
A low-temperature cold water unit structure for single machine two-stage, the oil eliminator, condenser, reservoir, evaporimeter, the gas-liquid separator that comprise compressor, throttling arrangement and be connected successively by system pipeline and compressor; Be provided with economizer between reservoir and evaporimeter, this economizer is also connected with compressor.The compressor that the utility model adopts unit bipolar, namely each low-temperature cold water unit only has a compressor, single compressor just can carry out two stages of compression, compared with prior art, under identical efficiency, just can realize the refrigeration of twice, effectively improve the Energy Efficiency Ratio of low-temperature cold water unit, and the single machine two-stage low temperature water cooling machine of this structure can make single module, also can make the form of two modules, three wired in parallel, get final product expansion machine pool-size, play again the effect of unit energy backup.It has simple and reasonable, regulate quick, easy to operate, dependable performance, Energy Efficiency Ratio high, practical.
Description
Technical field
The utility model relates to a kind of low-temperature cold water unit structure, specifically a kind of low-temperature cold water unit structure of single machine two-stage.
Background technology
The low-temperature cold water unit of current use mainly contains single-stage compression refrigeration system, folding type cooling system and uses double-stage compressive refrigerating system three kinds of forms of two compressors.Wherein, single-stage compression refrigeration system structure is simple, easy to operate, but Energy Efficiency Ratio is very low, and-40 DEG C time, Energy Efficiency Ratio only has about 0.8 usually; Folding type cooling system adopts high/low temperature dual unit cooling system, and two systems are linked up by a condenser/evaporator, and owing to needing to cooperatively interact between high/low temperature system, therefore control system is complicated, and Operation and Maintenance all needs special technical staff; Adopt the double-stage compressive refrigerating system of two compressors, low-pressure stage compressor by refrigerant compression to intermediate pressure, cold-producing medium under intermediate pressure through supercooling, and then is compressed to condensing pressure further to high-pressure unit compressor, and this two stage compression refrigeration has identical problem with cascade refrigeration.Therefore, further improvement is necessary.
Utility model content
The purpose of this utility model aims to provide a kind of simple and reasonable, low-temperature cold water unit structure of regulating quick, easy to operate, that dependable performance, Energy Efficiency Ratio are high single machine two-stage, to overcome weak point of the prior art.
The low-temperature cold water unit structure of a kind of single machine two-stage designed by this object, comprise compressor, it is characterized in that: the oil eliminator, condenser, reservoir, evaporimeter, the gas-liquid separator that also comprise throttling arrangement and be connected successively by system pipeline and compressor; Wherein, be provided with economizer between reservoir and evaporimeter, this economizer is also connected with compressor.
Described compressor is unit double stage compressor and carries out adding unloading according to the leaving water temperature of low-temperature cold water unit.
Described economizer is connected with compressor, reservoir and evaporimeter respectively by system pipeline; Be divided into two-way by economizer after the cold-producing medium of low-temperature cold water unit enters reservoir, wherein lead up to the middle air entry entering compressor after economizer evaporation endothermic, economizer of separately leading up to cross cold after enter evaporimeter.
The cold-producing medium of described low-temperature cold water unit is anti-icing fluid, comprises ethylene glycol solution, calcium chloride solution, glacial epoch refrigerant.
The exhaust outlet of described compressor is connected with oil eliminator by system pipeline, the cold-producing medium of low-temperature cold water unit enters shell-and-tube cooler from the exhaust outlet of oil eliminator, cold-producing medium becomes liquid state from gaseous state in shell-and-tube cooler, liquid refrigerant enters in reservoir by shell-and-tube cooler, after the first expansion valve throttling of throttling arrangement, economizer is entered from reservoir cold-producing medium out, make cold-producing medium excessively cold, cross cold cold-producing medium after the second expansion valve throttling of throttling arrangement, enter evaporator evaporation heat absorption, the cold-producing medium of heat absorption evaporation enters into compressor by evaporimeter through gas-liquid separator, complete kind of refrigeration cycle.
Described low-temperature cold water unit also comprises the liquid spray apparatus be arranged between compressor and reservoir, between the refrigerant injection of the low-temperature cold water unit through reservoir is arbitrarily downgraded to the height of compressor by this liquid spray apparatus.
Described low-temperature cold water unit also comprises the oil cooler be arranged between compressor and oil eliminator, this oil cooler is cooled by cooling water, air or the cold-producing medium of self, its one end is connected with compressor, the other end is connected with oil eliminator, is wherein provided with oil pressure difference switch between oil cooler and compressor; The lubricating oil of low-temperature cold water unit enters oil eliminator from the exhaust outlet of compressor, gathers the bottom of oil eliminator and control to be back to compressor by oil pressure difference switch through separation.
The utility model is by the improvement of said structure, adopt the compressor that unit is bipolar, namely each low-temperature cold water unit only has a compressor, single compressor just can carry out two stages of compression, compared with prior art, the refrigeration of twice just can be realized under identical efficiency, effectively improve the Energy Efficiency Ratio of low-temperature cold water unit, and the single machine two-stage low temperature water cooling machine of this structure can make single module, also can make the form of two modules, three wired in parallel, get final product expansion machine pool-size, play again the effect of unit energy backup.It has simple and reasonable, regulate quick, easy to operate, dependable performance, Energy Efficiency Ratio high, practical.
Accompanying drawing explanation
Fig. 1 is the utility model structural representation.
Detailed description of the invention
Below in conjunction with drawings and Examples, the utility model is further described.
See Fig. 1, the low-temperature cold water unit structure of this single machine two-stage, comprises compressor 1, throttling arrangement and the oil eliminator 2, condenser 3, reservoir 4, evaporimeter 5, the gas-liquid separator 6 that are connected successively by system pipeline and compressor 1; Wherein, be provided with economizer 7 between reservoir 4 and evaporimeter 5, this economizer 7 is also connected with compressor 1.
Compressor 1 is unit double stage compressor, namely each low-temperature cold water unit only has a compressor, single compressor just can carry out two stages of compression, this compressor 1 carries out adding unloading according to the leaving water temperature of low-temperature cold water unit, when leaving water temperature reaches a certain setting value higher than setting leaving water temperature, compressor 1 loads, and when leaving water temperature reaches a certain setting value lower than setting leaving water temperature, compressor 1 unloads.
Economizer 7 is connected with compressor 1, reservoir 4 and evaporimeter 5 respectively by system pipeline; Be divided into two-way by economizer 7 after the cold-producing medium of low-temperature cold water unit enters reservoir 4, wherein lead up to the middle air entry entering compressor 1 after economizer 7 evaporation endothermic, economizer 7 of separately leading up to cross cold after enter evaporimeter 5.
The cold-producing medium of low-temperature cold water unit is anti-icing fluid, comprises ethylene glycol solution, calcium chloride solution, glacial epoch refrigerant.
In said structure, the exhaust outlet of compressor 1 is connected with oil eliminator 2 by system pipeline, the cold-producing medium of low-temperature cold water unit enters shell-and-tube cooler 3 from the exhaust outlet of oil eliminator 2, cold-producing medium becomes liquid state from gaseous state in shell-and-tube cooler 3, liquid refrigerant enters in reservoir 4 by shell-and-tube cooler 3, after the first expansion valve 11 throttling of throttling arrangement, economizer 7 is entered from reservoir 4 cold-producing medium out, make cold-producing medium excessively cold, cross cold cold-producing medium and enter evaporimeter 5 evaporation endothermic after the second expansion valve 12 throttling of throttling arrangement, the cold-producing medium of heat absorption evaporation enters into compressor 1 by evaporimeter 5 through gas-liquid separator 6, complete kind of refrigeration cycle.
Low-temperature cold water unit also comprises the liquid spray apparatus 10 be arranged between compressor 1 and reservoir 4, between the refrigerant injection of the low-temperature cold water unit through reservoir 4 is arbitrarily downgraded to the height of compressor 1 by this liquid spray apparatus 10.Both can cooling motor, the delivery temperature of compressor 1 low pressure and the load of hiigh pressure stage can be reduced again.
Low-temperature cold water unit also comprises the oil cooler 8 be arranged between compressor 1 and oil eliminator 2, this oil cooler 8 is cooled by cooling water, air or the cold-producing medium of self, its one end is connected with compressor 1, the other end is connected with oil eliminator 2, is wherein provided with oil pressure difference switch 9 between oil cooler 8 and compressor 1; The lubricating oil of low-temperature cold water unit enters oil eliminator 2 from the exhaust outlet of compressor 1, gathers the bottom of oil eliminator 2 and control to be back to compressor 1 by oil pressure difference switch 9 through separation.Specifically, when in oil eliminator 9, lubricating oil gathers a certain amount of, oil pressure difference switch 9 is opened, and lubricating oil enters in oil cooler 8 by oil eliminator 2, finally gets back to again in compressor 1 through overcooled lubricating oil.
Above-described single machine two-stage low temperature water cooling machine is only single module, also can make the form of two modules, three wired in parallel, gets final product expansion machine pool-size, plays again the effect of unit energy backup.
Above-mentioned is preferred version of the present utility model, and those of ordinary skill in the art, to its simple modification or transformation, all drop within protection domain of the present utility model.
Claims (7)
1. the low-temperature cold water unit structure of a single machine two-stage, comprise compressor (1), it is characterized in that: the oil eliminator (2), condenser (3), reservoir (4), evaporimeter (5), the gas-liquid separator (6) that also comprise throttling arrangement and be connected successively by system pipeline and compressor (1); Wherein, be provided with economizer (7) between reservoir (4) and evaporimeter (5), this economizer (7) is also connected with compressor (1).
2. the low-temperature cold water unit structure of single machine two-stage according to claim 1, is characterized in that described compressor (1) carries out adding unloading for unit double stage compressor and according to the leaving water temperature of low-temperature cold water unit.
3. the low-temperature cold water unit structure of single machine two-stage according to claim 2, is characterized in that described economizer (7) is connected with compressor (1), reservoir (4) and evaporimeter (5) respectively by system pipeline; The cold-producing medium of low-temperature cold water unit enters reservoir (4) and is divided into two-way by economizer (7) afterwards, wherein lead up to the middle air entry entering compressor (1) after economizer (7) evaporation endothermic, economizer (7) of separately leading up to cross cold after enter evaporimeter (5).
4. the low-temperature cold water unit structure of single machine two-stage according to claim 3, is characterized in that the cold-producing medium of described low-temperature cold water unit is anti-icing fluid, comprises ethylene glycol solution, calcium chloride solution, glacial epoch refrigerant.
5. the low-temperature cold water unit structure of single machine two-stage according to any one of claim 1-4, it is characterized in that the exhaust outlet of described compressor (1) is connected with oil eliminator (2) by system pipeline, the cold-producing medium of low-temperature cold water unit enters shell-and-tube cooler (3) from the exhaust outlet of oil eliminator (2), cold-producing medium becomes liquid state from gaseous state in shell-and-tube cooler (3), liquid refrigerant enters in reservoir (4) by shell-and-tube cooler (3), after the first expansion valve (11) throttling of throttling arrangement, economizer (7) is entered from reservoir (4) cold-producing medium out, make cold-producing medium excessively cold, cross cold cold-producing medium and enter evaporimeter (5) evaporation endothermic after the second expansion valve (12) throttling of throttling arrangement, the cold-producing medium of heat absorption evaporation enters into compressor (1) by evaporimeter (5) through gas-liquid separator (6), complete kind of refrigeration cycle.
6. the low-temperature cold water unit structure of single machine two-stage according to claim 1, it is characterized in that described low-temperature cold water unit also comprises the liquid spray apparatus (10) be arranged between compressor (1) and reservoir (4), between the refrigerant injection of the low-temperature cold water unit through reservoir (4) is arbitrarily downgraded to the height of compressor (1) by this liquid spray apparatus (10).
7. the low-temperature cold water unit structure of single machine two-stage according to claim 1, it is characterized in that described low-temperature cold water unit also comprises the oil cooler (8) be arranged between compressor (1) and oil eliminator (2), this oil cooler (8) is cooled by cooling water, air or the cold-producing medium of self, its one end is connected with compressor (1), the other end is connected with oil eliminator (2), is wherein provided with oil pressure difference switch (9) between oil cooler (8) and compressor (1); The lubricating oil of low-temperature cold water unit enters oil eliminator (2) from the exhaust outlet of compressor (1), gathers the bottom of oil eliminator (2) and control to be back to compressor (1) by oil pressure difference switch (9) through separation.
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| CN201420545296.0U CN204254921U (en) | 2014-09-22 | 2014-09-22 | The low-temperature cold water unit structure of single machine two-stage |
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| CN201420545296.0U CN204254921U (en) | 2014-09-22 | 2014-09-22 | The low-temperature cold water unit structure of single machine two-stage |
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Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004089A (en) * | 2015-07-31 | 2015-10-28 | 广东申菱空调设备有限公司 | Cascaded unit used for both medium-high temperature cold storage house and low temperature cold storage house |
| CN105423620A (en) * | 2015-12-25 | 2016-03-23 | 浙江工业大学 | Efficient large temperature rise two-stage throttling intercooling heat pump water heater |
| CN106066101A (en) * | 2016-06-03 | 2016-11-02 | 济南欧菲特制冷设备有限公司 | A kind of double-effect heat pump unit |
| CN107763868A (en) * | 2017-12-07 | 2018-03-06 | 福建雪人股份有限公司 | A kind of Condensing units with oil cooler |
| CN106091455B (en) * | 2016-08-04 | 2018-07-10 | 青岛大学 | A kind of quasi- two stage compression refrigeration system of piston compressor intermediate injection |
| CN108800685A (en) * | 2018-08-22 | 2018-11-13 | 安徽美乐柯制冷空调设备有限公司 | A kind of handpiece Water Chilling Units equipped with subcooler and lube oil cooler |
| CN110686428A (en) * | 2019-10-14 | 2020-01-14 | 珠海格力电器股份有限公司 | Refrigerant circulation system, air conditioning unit and control method of refrigerant circulation system |
| CN112665221A (en) * | 2020-12-07 | 2021-04-16 | 珠海格力电器股份有限公司 | Control system and control method for improving energy efficiency of compressor and air conditioner |
-
2014
- 2014-09-22 CN CN201420545296.0U patent/CN204254921U/en active Active
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105004089A (en) * | 2015-07-31 | 2015-10-28 | 广东申菱空调设备有限公司 | Cascaded unit used for both medium-high temperature cold storage house and low temperature cold storage house |
| CN105423620A (en) * | 2015-12-25 | 2016-03-23 | 浙江工业大学 | Efficient large temperature rise two-stage throttling intercooling heat pump water heater |
| CN105423620B (en) * | 2015-12-25 | 2017-11-07 | 浙江工业大学 | A kind of efficient big temperature rise two-stage throttling cooling during rolling heat pump water-heating machine |
| CN106066101A (en) * | 2016-06-03 | 2016-11-02 | 济南欧菲特制冷设备有限公司 | A kind of double-effect heat pump unit |
| CN106091455B (en) * | 2016-08-04 | 2018-07-10 | 青岛大学 | A kind of quasi- two stage compression refrigeration system of piston compressor intermediate injection |
| CN107763868A (en) * | 2017-12-07 | 2018-03-06 | 福建雪人股份有限公司 | A kind of Condensing units with oil cooler |
| CN108800685A (en) * | 2018-08-22 | 2018-11-13 | 安徽美乐柯制冷空调设备有限公司 | A kind of handpiece Water Chilling Units equipped with subcooler and lube oil cooler |
| CN110686428A (en) * | 2019-10-14 | 2020-01-14 | 珠海格力电器股份有限公司 | Refrigerant circulation system, air conditioning unit and control method of refrigerant circulation system |
| CN112665221A (en) * | 2020-12-07 | 2021-04-16 | 珠海格力电器股份有限公司 | Control system and control method for improving energy efficiency of compressor and air conditioner |
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Address after: 528300, 8, No. ten, flourishing machinery equipment garden, Chencun Town, Shunde District, Guangdong, Foshan Patentee after: GUANGDONG SHENLING AIR-CONDITIONING EQUIPMENT CO., LTD. Address before: 528300, 8, No. ten, flourishing machinery equipment garden, Chencun Town, Shunde District, Guangdong, Foshan Patentee before: Guangdong Shenling Air Conditioning Equipment Co., Ltd. |