CN106403334A - Refrigerating system capable of performing optimizing control on pressure ratio of water chilling unit - Google Patents
Refrigerating system capable of performing optimizing control on pressure ratio of water chilling unit Download PDFInfo
- Publication number
- CN106403334A CN106403334A CN201610819379.8A CN201610819379A CN106403334A CN 106403334 A CN106403334 A CN 106403334A CN 201610819379 A CN201610819379 A CN 201610819379A CN 106403334 A CN106403334 A CN 106403334A
- Authority
- CN
- China
- Prior art keywords
- pressure ratio
- expansion valve
- water chilling
- compressor
- refrigeration system
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 28
- 238000005057 refrigeration Methods 0.000 claims description 32
- 238000001816 cooling Methods 0.000 claims description 4
- 230000008676 import Effects 0.000 claims description 3
- 238000004891 communication Methods 0.000 claims description 2
- 239000003507 refrigerant Substances 0.000 abstract description 2
- 238000001704 evaporation Methods 0.000 description 3
- 238000007710 freezing Methods 0.000 description 2
- 230000008014 freezing Effects 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000005119 centrifugation Methods 0.000 description 1
- 239000002826 coolant Substances 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000003137 locomotive effect Effects 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 238000005461 lubrication Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Classifications
-
- 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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/04—Compression machines, plants or systems with non-reversible cycle with compressor of rotary type
-
- 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
-
- 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
- F25B41/34—Expansion valves with the valve member being actuated by electric means, e.g. by piezoelectric actuators
-
- 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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
The invention provides a refrigerating system capable of performing optimizing control on the pressure ratio of a water chilling unit. The refrigerating system comprises a compressor, a condenser, an expansion valve and a heat exchanger, wherein the compressor, the condenser, the expansion valve and the heat exchanger are connected to a refrigerating circuit; a refrigerant is in a one-way cycle and passes through the compressor, the condenser and the heat exchanger; and the expansion valve is arranged at an outlet of the condenser, and the open angle of the expansion valve is adjusted according to the pressure ratio of the two sides of the compressor. According to the refrigerating system disclosed by the invention, the expansion valve is arranged in the refrigerating circuit for controlling the high pressure ratio and the low pressure ratio of the refrigerating system capable of performing optimizing control on the pressure ratio of the water chilling unit, so that the problem of low pressure ratio in the actual operation is solved, and the whole system can be maintained in a safe operation area.
Description
Technical field
The present invention relates to refrigeration system, more particularly, to a kind of refrigeration system of the pressure ratio of energy optimal control handpiece Water Chilling Units.
Background technology
Refrigeration system provides cold air, is applied to the every aspect lived, produce, there are various technical problems.Wherein, cold
Water dispenser group low-pressure ratio usually occurs in the initial start stage of unit, and freezing temperature is high, and coolant water temperature is low.And this problem is to all classes
The handpiece Water Chilling Units of type compressor all can produce impact, the stable operation of impact unit.It is listed below：
Helical-lobe compressor handpiece Water Chilling Units：The internal lubrication of helical-lobe compressor needs certain height pressure reduction to carry out mechanical forced
Circulation, when high-low pressure pressure ratio, the internal lubricating system of helical-lobe compressor will appear from problem；
Oil-free centrifugal compressor handpiece Water Chilling Units：Such compressor, due to being high-speed electric expreess locomotive, built-in DC frequency-changing
Therefore, to assure that cooling system is working properly, in order to ensure cooling system is working properly, refrigeration system needs to ensure certain height device
Low-pressure ratio, otherwise cools down liquid measure by deficiency, leads to report to the police；
Scroll compressor handpiece Water Chilling Units：When pressure ratio is low, evaporating temperature is high, and capacity is big, and a large amount of freezing oil will therewith
Discharge, will appear from throwing oily problem, meanwhile, when evaporating temperature is high, when capacity is big, the operation noise of compressor will increase.
Content of the invention
For the problems referred to above of prior art, the refrigeration system of the present invention by the expansion valve of setting in refrigerating circuit Lai
Control the high-low pressure ratio in refrigeration system, thus solving the problems, such as low-pressure ratio in actual motion so that whole system can keep
In safe operating area.
The invention provides a kind of can optimal control handpiece Water Chilling Units pressure ratio refrigeration system, including being connected to a refrigeration
Compressor in loop, condenser, expansion valve and heat exchanger, wherein cold-producing medium one-way circulation pass through described compressor, condenser
And heat exchanger, wherein said expansion valve is arranged at the exit of described condenser, and the pressure ratio according to described compressor both sides
To adjust the aperture of described expansion valve.
It is preferred that in the refrigeration system of the pressure ratio of above-mentioned energy optimal control handpiece Water Chilling Units, also including：Pressure sensing
Device, described pressure sensor detects the pressure value of described compressor both sides.
It is preferred that in the refrigeration system of the pressure ratio of above-mentioned energy optimal control handpiece Water Chilling Units, also including：Control single
Unit, is connected with described pressure sensor and expansion valve signal, wherein said control unit detects according to described pressure sensor
Pressure value determining described pressure ratio, wherein said control unit adjusts the aperture of described expansion valve according to described pressure ratio.
It is preferred that in the refrigeration system of the pressure ratio of above-mentioned energy optimal control handpiece Water Chilling Units, if described pressure ratio
Less than preset value, then described control unit reduces the aperture of described expansion valve, and if described pressure ratio is more than described preset value,
Then described control unit improves the aperture of described expansion valve.
It is preferred that in the refrigeration system of the pressure ratio of above-mentioned energy optimal control handpiece Water Chilling Units, described expansion valve is electricity
Sub- expansion valve or hand expansion valve.
It is preferred that in the refrigeration system of the pressure ratio of above-mentioned energy optimal control handpiece Water Chilling Units, described cold-producing medium is
R134a, R407C, R410A or R22 cold-producing medium.
It is preferred that in the refrigeration system of the pressure ratio of above-mentioned energy optimal control handpiece Water Chilling Units, described condenser is wind
Cold finned cooler.
It is preferred that in the refrigeration system of the pressure ratio of above-mentioned energy optimal control handpiece Water Chilling Units, described compressor is spiral shell
Bar compressor, oil-free centrifugal compressor or scroll compressor.
It is preferred that in above-mentioned refrigeration system, described expansion valve includes inlet and outlet, described import and described expansion
The first pipeline communication in valve and described outlet is connected with the second pipe in expansion valve, wherein said first pipeline and described
Two pipelines are arranged substantially perpendicular to each other in the horizontal plane, and the conduit of the side of described first pipeline and described second pipe and heat exchanger
It is connected, and opposite side is connected with the conduit of condenser.
It should be appreciated that the general description more than present invention and the following detailed description are all exemplary and explanat,
And it is intended that the present invention provides further explanation.
Brief description
Fig. 1 shows the structured flowchart of the refrigeration system according to the present invention.
Fig. 2 shows the structural representation of an embodiment of expansion valve.
Specific embodiment
With reference first to Fig. 1, Fig. 1 shows the structured flowchart of the refrigeration system according to the present invention.As illustrated, the present invention
Refrigeration system 100 mainly includes：It is connected to compressor 101 in a refrigerating circuit, condenser 102, expansion valve 103 and heat exchanger
104.
Cold-producing medium (for example described cold-producing medium is preferably R134a, R407C, R410A or R22 cold-producing medium) one-way circulation passes through
Described compressor 101, condenser 102 and heat exchanger 104.Described expansion valve 103 is arranged at the outlet of described condenser 102 (i.e.
Cold-producing medium flows out the outlet of condenser 102) place, and described expansion valve is adjusted according to the pressure ratio of described compressor 101 both sides
103 aperture.
Condenser 102 is preferably air cooling fin formula condenser.Compressor 101 is preferably helical-lobe compressor, oil-free centrifugation pressure
Contracting machine or scroll compressor.
It is preferred that pressure sensor 105 can be arranged further, for example, can be arranged at the both sides of compressor 101, to examine
Survey the pressure value of described compressor both sides.This pressure sensor 105 is connected with control unit 106 signal.Additionally, this control unit
105 are also connected with described expansion valve 103 signal.
So, the pressure value that described control unit 106 just can detect according to described pressure sensor 105 is to determine
State pressure ratio, then this control unit 106 can adjust the aperture of described expansion valve 103 according to described pressure ratio, such as at this
In embodiment, expansion valve 103 is electric expansion valve.Or, if expansion valve 103 selection is hand expansion valve, described control
Unit 106 can also connect a display 107 further, and this display 107 can directly display pressure ratio or can also show
Show other instructions of the aperture improving or reducing expansion valve 103.
When being embodied as, if described pressure ratio is less than preset value, described control unit 106 reduces described expansion valve
103 aperture.In other words, when pressure ratio is less than this preset value, progressively turn down expansion valve 103, such cold-producing medium (refrigerant) will
Progressively transfer in condenser 102, condensing pressure progressively increases；Cold-producing medium in heat exchanger 104 (evaporimeter) will reduce simultaneously,
Evaporating pressure will reduce.So, pressure ratio will be stepped up.If additionally, described pressure ratio is more than described preset value, described
Control unit 106 improves the aperture of described expansion valve 103, if pressure ratio is equal with preset value, can not process.
Turning now to Fig. 2, Fig. 2 shows the structural representation of an embodiment (hand expansion valve) of expansion valve 103.Should
Expansion valve 103 includes inlet and outlet, and this import is connected and this outlet and expansion valve with the first pipeline 201 in expansion valve 103
Second pipe 202 in 103 connects, and this first pipeline 201 is located at the lower section of this second pipe 202.In described expansion valve 103
Centre is provided with the expansion or shrinkage that causes of temperature change and axially reciprocating according to the liquid flowing in described second pipe
Axostylus axostyle (not shown), the top of this expansion valve 103 is provided with lid 203, and this axostylus axostyle is arranged at the lower section of described upper lid 203.
Additionally, the bottom of this axostylus axostyle is additionally provided with the open and close valve (not shown) of the flow adjusting the first pipeline 201.It is preferred that described
One pipeline 201 and described second pipe 202 are arranged substantially perpendicular to each other in the horizontal plane, wherein the conduit 204 of side and heat exchanger 104
Be connected with 205 (end of this two conduits is provided with contiguous block 210), and the conduit 206 of opposite side and condenser 102 and
207 (end of this two conduits is provided with contiguous block 211) are connected.Particularly, the first and second pipelines 201 and 202 are led together
The connection of pipe 204,205 and conduit 206 and 207 can pass through screw (screw 208 in such as Fig. 2 and spiral shell as shown in figure
Hole 209) fixing mode to be realizing.According to the present invention, existed by making described first pipeline 201 and described second pipe 202
Arranged substantially perpendicular to each other on horizontal plane, the space requirement of assembling work can be reduced, that is, allow to realize with cold in less space
Condenser 102 and the connection of heat exchanger 104, therefore this design are particularly suitable for the applied environment of the present invention.
To sum up, the refrigeration system of the present invention controls the height in refrigeration system by the expansion valve of setting in refrigerating circuit
Low-pressure ratio, thus solve the problems, such as low-pressure ratio in actual motion so that whole system can be maintained at safe operating area.This
Outward, by being improved appropriately to the structure of expansion valve so that the present invention can be applied to space narrower and small should
Use environment.
Embodiment described above only have expressed the several embodiments of the present invention, and its description is more concrete and detailed, but simultaneously
Therefore the restriction to the scope of the claims of the present invention can not be interpreted as.It should be pointed out that for those of ordinary skill in the art
For, without departing from the inventive concept of the premise, some deformation can also be made and improve, these broadly fall into the guarantor of the present invention
Shield scope.Therefore, the protection domain of patent of the present invention should be defined by claims.
Claims (9)
1. a kind of refrigeration system of the pressure ratio of energy optimal control handpiece Water Chilling Units is it is characterised in that inclusion is connected to a refrigeration and returns
Compressor in road, condenser, expansion valve and heat exchanger, wherein cold-producing medium one-way circulation pass through described compressor, condenser and
Heat exchanger, wherein said expansion valve is arranged at the exit of described condenser, and according to the pressure ratio of described compressor both sides Lai
Adjust the aperture of described expansion valve.
2. the refrigeration system of the pressure ratio of energy optimal control handpiece Water Chilling Units as claimed in claim 1 is it is characterised in that also wrap
Include：Pressure sensor, described pressure sensor detects the pressure value of described compressor both sides.
3. the refrigeration system of the pressure ratio of energy optimal control handpiece Water Chilling Units as claimed in claim 2 is it is characterised in that also wrap
Include：Control unit, is connected with described pressure sensor and expansion valve signal, wherein said control unit is according to described pressure sensing
Determining described pressure ratio, wherein said control unit adjusts described expansion valve according to described pressure ratio to the pressure value that device detects
Aperture.
If as claimed in claim 3 can optimal control handpiece Water Chilling Units pressure ratio refrigeration system it is characterised in that institute
State pressure ratio and be less than preset value, then described control unit reduces the aperture of described expansion valve, and if described pressure ratio is more than institute
State preset value, then described control unit improves the aperture of described expansion valve.
5. as claimed in claim 1 can optimal control handpiece Water Chilling Units pressure ratio refrigeration system it is characterised in that described swollen
Swollen valve is electric expansion valve or hand expansion valve.
6. as claimed in claim 1 can optimal control handpiece Water Chilling Units pressure ratio refrigeration system it is characterised in that described system
Cryogen is R134a, R407C, R410A or R22 cold-producing medium.
7. as claimed in claim 1 can optimal control handpiece Water Chilling Units pressure ratio refrigeration system it is characterised in that described cold
Condenser is air cooling fin formula condenser.
8. as claimed in claim 1 can optimal control handpiece Water Chilling Units pressure ratio refrigeration system it is characterised in that described pressure
Contracting machine is helical-lobe compressor, oil-free centrifugal compressor or scroll compressor.
9. as claimed in claim 1 can optimal control handpiece Water Chilling Units pressure ratio refrigeration system it is characterised in that described swollen
Swollen valve includes inlet and outlet, in the first pipeline communication in described import and described expansion valve and described outlet and expansion valve
Second pipe connects, and wherein said first pipeline and described second pipe are arranged substantially perpendicular to each other in the horizontal plane, and described first
Pipeline is connected with the conduit of heat exchanger with the side of described second pipe, and opposite side is connected with the conduit of condenser.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610819379.8A CN106403334A (en) | 2016-09-13 | 2016-09-13 | Refrigerating system capable of performing optimizing control on pressure ratio of water chilling unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610819379.8A CN106403334A (en) | 2016-09-13 | 2016-09-13 | Refrigerating system capable of performing optimizing control on pressure ratio of water chilling unit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106403334A true CN106403334A (en) | 2017-02-15 |
Family
ID=57999672
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610819379.8A Pending CN106403334A (en) | 2016-09-13 | 2016-09-13 | Refrigerating system capable of performing optimizing control on pressure ratio of water chilling unit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106403334A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798626A (en) * | 2019-01-07 | 2019-05-24 | 广东美的暖通设备有限公司 | The control method and device of the electric expansion valve of outer machine heat exchanger |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498534A (en) * | 2008-12-08 | 2009-08-05 | 天津大学 | Multi-target intelligent control method for electronic expansion valve of refrigeration air conditioner heat pump system |
| CN102859294A (en) * | 2010-04-27 | 2013-01-02 | 三菱电机株式会社 | Refrigeration cycle device |
| CN104132487A (en) * | 2014-07-24 | 2014-11-05 | 康特能源科技(苏州)有限公司 | Air source heat pump system of double-pressure control |
| CN105074353A (en) * | 2013-03-27 | 2015-11-18 | 日立空调·家用电器株式会社 | Air conditioner and method for operating air conditioner |
| CN205678963U (en) * | 2016-06-06 | 2016-11-09 | 克莱门特捷联制冷设备(上海)有限公司 | A kind of high-low pressure is than controlled refrigeration system |
-
2016
- 2016-09-13 CN CN201610819379.8A patent/CN106403334A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101498534A (en) * | 2008-12-08 | 2009-08-05 | 天津大学 | Multi-target intelligent control method for electronic expansion valve of refrigeration air conditioner heat pump system |
| CN102859294A (en) * | 2010-04-27 | 2013-01-02 | 三菱电机株式会社 | Refrigeration cycle device |
| CN105074353A (en) * | 2013-03-27 | 2015-11-18 | 日立空调·家用电器株式会社 | Air conditioner and method for operating air conditioner |
| CN104132487A (en) * | 2014-07-24 | 2014-11-05 | 康特能源科技(苏州)有限公司 | Air source heat pump system of double-pressure control |
| CN205678963U (en) * | 2016-06-06 | 2016-11-09 | 克莱门特捷联制冷设备(上海)有限公司 | A kind of high-low pressure is than controlled refrigeration system |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798626A (en) * | 2019-01-07 | 2019-05-24 | 广东美的暖通设备有限公司 | The control method and device of the electric expansion valve of outer machine heat exchanger |
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| Date | Code | Title | Description |
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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 | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170215 |