CN104596144A - Refrigerating unit - Google Patents
Refrigerating unit Download PDFInfo
- Publication number
- CN104596144A CN104596144A CN201510026124.1A CN201510026124A CN104596144A CN 104596144 A CN104596144 A CN 104596144A CN 201510026124 A CN201510026124 A CN 201510026124A CN 104596144 A CN104596144 A CN 104596144A
- Authority
- CN
- China
- Prior art keywords
- refrigerant
- heat exchanger
- economizer
- compressor
- condenser
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 239000003507 refrigerant Substances 0.000 claims abstract description 90
- 230000001502 supplementing effect Effects 0.000 claims abstract description 7
- 238000005057 refrigeration Methods 0.000 claims description 44
- 239000007788 liquid Substances 0.000 abstract description 25
- 238000004781 supercooling Methods 0.000 abstract description 10
- 238000004378 air conditioning Methods 0.000 abstract description 2
- 239000013589 supplement Substances 0.000 abstract 1
- 230000006835 compression Effects 0.000 description 4
- 238000007906 compression Methods 0.000 description 4
- 239000002826 coolant Substances 0.000 description 4
- 238000004134 energy conservation Methods 0.000 description 4
- 238000001704 evaporation Methods 0.000 description 4
- 230000008020 evaporation Effects 0.000 description 4
- 230000005494 condensation Effects 0.000 description 3
- 238000009833 condensation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000009711 regulatory function Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B7/00—Compression machines, plants or systems, with cascade operation, i.e. with two or more circuits, the heat from the condenser of one circuit being absorbed by the evaporator of the next circuit
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
- F25B41/31—Expansion valves
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Mechanical Engineering (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
Abstract
The invention discloses a refrigerating unit, and relates to the technical field of air-conditioning refrigerating systems. The refrigerating unit comprises a condenser, a first-stage throttle valve, an economizer, a second-stage throttle valve, an evaporator and a compressor which are sequentially communicated through a refrigerant pipeline, and further comprises a compressor air supplementing device which is arranged between the condenser and the economizer and comprises a heat exchanger connected with the first-stage throttle valve in parallel, a first refrigerant side input end and a second refrigerant side input end of the heat exchanger are respectively communicated with a refrigerant output end of the condenser through the refrigerant pipeline, an expansion valve is arranged on the refrigerant pipeline connecting the refrigerant output end of the condenser and the first refrigerant side input end of the heat exchanger, the first refrigerant side output end is communicated with an air supplementing port of the compressor, and the second refrigerant side output end is communicated with the refrigerant input end of the economizer. The invention improves the supercooling degree of the liquid refrigerant in the economizer and the energy efficiency of the refrigerating unit, and can also finely adjust and control the air supplement amount entering the compressor, so that the refrigerating unit can run more energy-saving.
Description
Technical field
The present invention relates to air-conditioning refrigeration system technical field, particularly relate to a kind of refrigeration unit.
Background technology
At present, the refrigeration unit used in industrial equipment manufacture, heating field of heat exchange requires more and more higher to efficiency, in order to improve unit efficiency, how in refrigeration unit, to configure economizer to improve the energy efficiency coefficient of refrigeration unit in the industry.
As shown in Figure 1, existing with in the refrigeration unit circulatory system of economizer, the liquid refrigerant of HTHP coming condenser 1 ' bottom enters into economizer 5 ' after one-level choke valve 2 ' throttling, in economizer 5 ', part liquid refrigerants flash evaporation becomes gas, the heat that simultaneously stability is certain, remaining liquid refrigerant temperature is made to reduce and produce cold, then enter into evaporimeter 4 ' evaporation and heat-exchange by two-step throttle valve 3 ', finally, by compressor 6 ' to gaseous coolant acting compression, enter in condenser 1 ', complete kind of refrigeration cycle; And the gaseous coolant after shwoot enters into compressor 6 ' second compression again through tonifying Qi pipeline, and then enter in condenser 1 ' and complete kind of refrigeration cycle.This cooling cycle system more effectively can improve the performance of refrigeration unit, but due to economizer 5 ' middle liquid refrigerants dependence heat convection, its degree of supercooling produced is less, to the performance boost limited use of complete machine.The simple air compensation relying on one-level choke valve 2 ' come command economy device 5 ' simultaneously, after restricting orifice aperture is fixing, the air compensation in economizer 5 ' is also just fixing, cannot adjust according to unit actual load situation.
Based on the above, need a kind of new refrigeration unit badly, little to solve the degree of supercooling that existing refrigeration unit economizer exists liquid refrigerants, refrigeration unit efficiency is low, and compressor air compensation cannot regulate according to refrigeration unit actual load, refrigeration unit runs the problems such as not energy-conservation.
Summary of the invention
The object of the invention is to propose a kind of refrigeration unit, this refrigeration unit can make the liquid refrigerants in economizer obtain comparatively big supercooling degree, effective raising refrigeration unit efficiency, simultaneously according to the air compensation of actual load demand modeling compressor, makes refrigeration unit run more energy-conservation.
For reaching this object, the present invention by the following technical solutions:
The invention provides a kind of refrigeration unit, described refrigeration unit comprises the condenser be communicated with successively by refrigerant pipe, one-level choke valve, economizer, two-step throttle valve, evaporimeter and compressor, also comprise the compressor making-up air device be arranged between described condenser and described economizer, described compressor making-up air device comprises the heat exchanger be connected in parallel with described one-level choke valve, first refrigerant side input of described heat exchanger is communicated with the refrigerant output of described condenser respectively by refrigerant pipe with second refrigerant side input, the refrigerant pipe connecting the refrigerant output of described condenser and the first refrigerant side input of described heat exchanger is provided with expansion valve, first refrigerant side output of described heat exchanger is communicated with the gas supplementing opening of described compressor, the second refrigerant side output of described heat exchanger is communicated with the refrigerant input of described economizer.
As a kind of preferred version, described economizer is plate-type heat-exchange economizer.
As a kind of preferred version, described condenser is plate type heat exchanger.
As a kind of preferred version, described heat exchanger is plate type heat exchanger.
As a kind of preferred version, described compressor is screw compressor.
Beneficial effect of the present invention is:
The invention provides a kind of refrigeration unit, described refrigeration unit comprises the condenser be communicated with successively by refrigerant pipe, one-level choke valve, economizer, two-step throttle valve, evaporimeter and compressor, also comprise the compressor making-up air device be arranged between described condenser and described economizer, described compressor making-up air device comprises the heat exchanger be connected in parallel with described one-level choke valve, first refrigerant side input of described heat exchanger is communicated with the refrigerant output of described condenser respectively by refrigerant pipe with second refrigerant side input, the refrigerant pipe connecting the refrigerant output of described condenser and the first refrigerant side input of described heat exchanger is provided with expansion valve, first refrigerant side output of described heat exchanger is communicated with the gas supplementing opening of described compressor, the second refrigerant side output of described heat exchanger is communicated with the refrigerant input of described economizer.
Compared with prior art, the present invention is by increase heat exchanger be connected in parallel with one-level choke valve, the liquid condensation of HTHP in condenser enters in economizer through the second refrigerant side of one-level choke valve and heat exchanger, from condenser, get the first refrigerant side that high-pressure liquid refrigerant enters heat exchanger after expansion valve throttling simultaneously, in heat exchanger, the liquid refrigerants of the first refrigerant side flashes to gas, compressor second compression is again entered by blowdown pipe, simultaneously stability heat make the liquid refrigerants of second refrigerant side produce comparatively be bigger than cold after enter in economizer, in heat exchanger, liquid refrigerants is by convection current and heat conduction heat exchange, larger degree of supercooling can be obtained, in economizer, part is flashed to gas by liquid refrigerants simultaneously, make the liquid refrigerants in economizer excessively cold further, after enter evaporation and heat-exchange in evaporimeter through two-step throttle valve, finally by compressor, gaseous coolant acting is compressed, enter in condenser, complete refrigerative circle system.
Invention increases the degree of supercooling of liquid refrigerants in economizer, further increase the efficiency of refrigeration unit.When refrigeration unit actual load changes, by the aperture of variable expansion valve, the air compensation of compressor can be entered into by meticulous regulation and control, thus it is more energy-conservation that refrigeration unit is run.
Accompanying drawing explanation
Fig. 1 is the structural representation of the refrigeration unit that prior art provides;
Fig. 2 is the structural representation of the refrigeration unit that the preferred embodiment of the present invention provides.
In figure:
1 ', condenser; 2 ', one-level choke valve; 3 ', two-step throttle valve; 4 ', evaporimeter; 5 ', economizer; 6 ', compressor;
1, condenser; 2, one-level choke valve; 3, two-step throttle valve; 4, evaporimeter; 5, economizer; 6, compressor; 7, heat exchanger; 8, expansion valve.
Detailed description of the invention
The technical problem solved for making the present invention, the technical scheme of employing and the technique effect that reaches are clearly, be described in further detail below in conjunction with the technical scheme of accompanying drawing to the embodiment of the present invention, obviously, described embodiment is only the present invention's part embodiment, instead of whole embodiments.Based on the embodiment in the present invention, those skilled in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Present embodiments provide a kind of refrigeration unit, the structure of this refrigeration unit as shown in Figure 2, described refrigeration unit comprises the condenser 1, one-level choke valve 2, economizer 5, two-step throttle valve 3, evaporimeter 4 and the compressor 6 that are communicated with successively by refrigerant pipe, also comprise the compressor making-up air device be arranged between described condenser 1 and described economizer 5, described compressor making-up air device comprises the heat exchanger 7 be connected in parallel with described one-level choke valve 2.
In the present embodiment, the first refrigerant side input of described heat exchanger 7 is communicated with respectively by the refrigerant output of refrigerant pipe with described condenser 1 with second refrigerant side input.As preferably, the refrigerant pipe connecting the refrigerant output of described condenser 1 and the first refrigerant side input of described heat exchanger 7 is provided with expansion valve 8.First refrigerant side output of described heat exchanger 7 is communicated with the gas supplementing opening of described compressor 6, and the second refrigerant side output of described heat exchanger 7 is communicated with by the refrigerant input of refrigerant pipe with described economizer 5.The gas outlet of described economizer 5 is communicated with the gas supplementing opening of compressor 6, and the refrigerant output of described economizer 5 is communicated with the refrigerant input of evaporimeter 4 by two-step throttle valve 3, and the refrigerant output of evaporimeter 4 is communicated with compressor 6.
The liquid condensation of HTHP in condenser 1 enters in economizer 5 through the second refrigerant side of one-level choke valve 2 and heat exchanger 7, from condenser 1, get the first refrigerant side that high-pressure liquid refrigerant enters heat exchanger 7 after expansion valve 8 throttling simultaneously, in the heat exchanger 7, the liquid refrigerants of the first refrigerant side flashes to gas, compressor 6 second compression is again entered by blowdown pipe, simultaneously stability heat make the liquid refrigerants of second refrigerant side produce comparatively be bigger than cold after enter in economizer 5, in heat exchanger 7, liquid refrigerants is by convection current and heat conduction heat exchange, larger degree of supercooling can be obtained, in economizer 5, part is flashed to gas by liquid refrigerants simultaneously, make the liquid refrigerants in economizer 5 excessively cold further, after enter evaporation and heat-exchange in evaporimeter 4 through two-step throttle valve 3, finally done work by compressor 6 pairs of gaseous coolants and compress, enter in condenser 1, complete refrigerative circle system.The heat exchanger 7 that the present invention is connected in parallel by increase by and one-level choke valve 2, makes liquid refrigerants in the heat exchanger 7 by convection current and heat conduction heat exchange, effectively improves the degree of supercooling of liquid refrigerants in economizer 5, further increase the efficiency of refrigeration unit.
Due to the setting of expansion valve 8, make when refrigeration unit actual load changes, by the aperture of variable expansion valve 8, the air compensation of compressor 6 can be entered into by meticulous regulation and control, thus it is more energy-conservation that refrigeration unit is run.
In the present embodiment, in order to improve heat exchange efficiency, increase the degree of supercooling of refrigerant, described economizer 5 is preferably plate-type heat-exchange economizer, and described economizer 5 can also be the economizer of pipe type heat transfer economizer or other types.
In the present embodiment, described condenser 1 is preferably plate type heat exchanger, its compact conformation, and effective heat transfer area is large, and heat exchange efficiency is high.Can also be pipe heat exchanger, but be not limited to plate type heat exchanger and pipe heat exchanger.
In the present embodiment, in order to increase heat transfer area, improve heat transfer efficiency, described heat exchanger 7 is preferably plate type heat exchanger equally.Can also be pipe heat exchanger, also be not limited to plate type heat exchanger and pipe heat exchanger.
In the present embodiment, described compressor 6 is preferably screw compressor, and screw compressor has good capacity regulatory function, can effectively coordinate with economizer and then realize large capacity and low delivery temperature.
The quantity of the heat exchanger in the present embodiment is not limited to one, can also be two or more, can design according to situations such as the efficiencies of real cost of production and refrigeration unit.The quantity of expansion valve is not limit, and its concrete number can design according to the actual load situation of refrigeration unit.
The composition of the refrigeration unit in the present invention and syndeton are not limited to above-mentioned situation, can also be other composition and version, can meet the degree of supercooling improving liquid condensation in economizer, improve the efficiency of refrigeration unit.
Below know-why of the present invention is described in conjunction with specific embodiments.These describe just in order to explain principle of the present invention, and can not be interpreted as limiting the scope of the invention by any way.Based on explanation herein, those skilled in the art does not need to pay performing creative labour can associate other detailed description of the invention of the present invention, and these modes all will fall within protection scope of the present invention.
Claims (5)
1. a refrigeration unit, described refrigeration unit comprises the condenser (1) be communicated with successively by refrigerant pipe, one-level choke valve (2), economizer (5), two-step throttle valve (3), evaporimeter (4) and compressor (6), it is characterized in that: also comprise the compressor making-up air device be arranged between described condenser (1) and described economizer (5), described compressor making-up air device comprises the heat exchanger (7) be connected in parallel with described one-level choke valve (2), first refrigerant side input of described heat exchanger (7) is communicated with respectively by the refrigerant output of refrigerant pipe with described condenser (1) with second refrigerant side input, the refrigerant pipe connecting the refrigerant output of described condenser (1) and the first refrigerant side input of described heat exchanger (7) is provided with expansion valve (8), first refrigerant side output of described heat exchanger (7) is communicated with the gas supplementing opening of described compressor (6), the second refrigerant side output of described heat exchanger (7) is communicated with the refrigerant input of described economizer (5).
2. refrigeration unit according to claim 1, is characterized in that: described economizer (5) is plate-type heat-exchange economizer.
3. refrigeration unit according to claim 1, is characterized in that: described condenser (1) is plate type heat exchanger.
4. refrigeration unit according to claim 1, is characterized in that: described heat exchanger (7) is plate type heat exchanger.
5. refrigeration unit according to claim 1, is characterized in that: described compressor (6) is screw compressor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510026124.1A CN104596144A (en) | 2015-01-19 | 2015-01-19 | Refrigerating unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510026124.1A CN104596144A (en) | 2015-01-19 | 2015-01-19 | Refrigerating unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104596144A true CN104596144A (en) | 2015-05-06 |
Family
ID=53122094
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510026124.1A Pending CN104596144A (en) | 2015-01-19 | 2015-01-19 | Refrigerating unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104596144A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352213A (en) * | 2015-12-14 | 2016-02-24 | 上海理工大学 | Steam and air cascade refrigerating system |
| CN108088116A (en) * | 2017-12-04 | 2018-05-29 | 珠海格力电器股份有限公司 | Heat pump system for increasing air supplement amount by utilizing heat recovery and control method thereof |
| CN111256381A (en) * | 2020-01-19 | 2020-06-09 | 珠海格力电器股份有限公司 | Compressor anti-surge air supply system, control method and air conditioning equipment |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03263551A (en) * | 1990-03-12 | 1991-11-25 | Sanyo Electric Co Ltd | Multiple refrigerating machine |
| CN103968477A (en) * | 2013-02-01 | 2014-08-06 | 珠海格力电器股份有限公司 | Air conditioner |
| CN204535172U (en) * | 2015-01-19 | 2015-08-05 | 珠海格力电器股份有限公司 | Refrigerating unit |
-
2015
- 2015-01-19 CN CN201510026124.1A patent/CN104596144A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH03263551A (en) * | 1990-03-12 | 1991-11-25 | Sanyo Electric Co Ltd | Multiple refrigerating machine |
| CN103968477A (en) * | 2013-02-01 | 2014-08-06 | 珠海格力电器股份有限公司 | Air conditioner |
| CN204535172U (en) * | 2015-01-19 | 2015-08-05 | 珠海格力电器股份有限公司 | Refrigerating unit |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105352213A (en) * | 2015-12-14 | 2016-02-24 | 上海理工大学 | Steam and air cascade refrigerating system |
| CN108088116A (en) * | 2017-12-04 | 2018-05-29 | 珠海格力电器股份有限公司 | Heat pump system for increasing air supplement amount by utilizing heat recovery and control method thereof |
| CN108088116B (en) * | 2017-12-04 | 2018-12-11 | 珠海格力电器股份有限公司 | Heat pump system for increasing air supplement amount by utilizing heat recovery and control method thereof |
| CN111256381A (en) * | 2020-01-19 | 2020-06-09 | 珠海格力电器股份有限公司 | Compressor anti-surge air supply system, control method and air conditioning equipment |
| CN111256381B (en) * | 2020-01-19 | 2021-09-21 | 珠海格力电器股份有限公司 | Compressor anti-surge air supply system, control method and air conditioning equipment |
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| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150506 |
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| RJ01 | Rejection of invention patent application after publication |