CN107289653A - Condensation pressure regulation device, Condensing units, refrigeration system and control method - Google Patents
Condensation pressure regulation device, Condensing units, refrigeration system and control method Download PDFInfo
- Publication number
- CN107289653A CN107289653A CN201610209157.4A CN201610209157A CN107289653A CN 107289653 A CN107289653 A CN 107289653A CN 201610209157 A CN201610209157 A CN 201610209157A CN 107289653 A CN107289653 A CN 107289653A
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- CN
- China
- Prior art keywords
- path
- interface
- regulation device
- temperature
- pressure regulation
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- 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.)
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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
- F25B1/00—Compression machines, plants or systems with non-reversible cycle
- F25B1/005—Compression machines, plants or systems with non-reversible cycle of the single unit type
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/20—Disposition of valves, e.g. of on-off valves or flow control valves
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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
- F25B49/00—Arrangement or mounting of control or safety devices
- F25B49/02—Arrangement or mounting of control or safety devices for compression type machines, plants or systems
-
- 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
- F25B2500/00—Problems to be solved
- F25B2500/31—Low ambient temperatures
-
- 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
Abstract
The present invention relates to condensation pressure regulation device, Condensing units, refrigeration system and control method, condensation pressure regulation device, include reservoir, one group of valve member and connecting line, there are first interface, second interface and the 3rd interface, the first interface, second interface and the 3rd interface connect the condensator outlet of refrigeration system, throttling arrangement import and evaporator respectively；When condensing pressure is relatively low, by controlling one group of valve member, cut off the connection of the reservoir and the condenser and throttling arrangement of refrigeration system, connect the connection of the reservoir and refrigeration system evaporator, simultaneously make the condenser of refrigeration system directly connected with throttling arrangement and without the reservoir, therefore condensing pressure is improved, making the refrigerant of condensator outlet has larger degree of supercooling.Compared to existing refrigeration system and condensation pressure regulation method, the degree of supercooling when present invention can increase cold season before refrigerant throttling improves running efficiency of system.
Description
Technical field
The present invention relates to refrigerating field, more particularly to a kind of condensation pressure regulation device, Condensing units, refrigeration system and
Condensation pressure control method.
Background technology
In refrigeration system, if condensing pressure is higher, compressor exhaust temperature can rise, and compression ratio increase, refrigerating capacity is reduced, work(
Consumption increase, condensing pressure is higher, is also easy to cause equipment breakage event.If condensing pressure is too low, particularly in the winter time, environment
Temperature or cooling water temperature are relatively low, cause condensing pressure too low, so that pressure differential is too small before and after heating power expansion valve, feed flow power is not
Foot, causes the refrigerant flow for flowing through heating power expansion valve drastically to reduce, substantially reduces refrigerating capacity, or even refrigerating plant work is lost
Adjust.In addition, the compressor of most producers, also has the use requirement of minimum condensing pressure, or even with evaporating pressure not
Together, minimum condensing pressure requirement is also different.Therefore, it is guarantee refrigeration system and the reliably working of compressor, it is necessary to which condensation is pressed
Power implements control.
The control method of condensing pressure, prior art mainly has two kinds：
First, control cooling water flow or cooling air quantity, for air-cooled, conventional has：1. fan motor speed change, 2. air-valves
Control to adjust cooling air delivery, 3. condensation fans open, stop control, these methods apply long-term environment temperature higher than 4 DEG C with
Composition and division in a proportion of entering the court is more effective；
2nd, from refrigerant side using bypass adjusting method control refrigerant pressure, specific connected mode is：Installed in condensator outlet
One septum valve, the other end connection reservoir entrance of septum valve, between exhaust outlet of compressor and reservoir entrance
Bypass pipe is connect, differential pressure control valve is installed on bypass pipe.
Using both the above method, Energy Efficiency Ratio of the refrigeration system in cold season is still relatively low, during with warm season or even summer
Compare, relatively.
The content of the invention
It is an object of the invention to provide a kind of condensation pressure regulation device, Condensing units, refrigeration system and control method,
During cold season, refrigeration system operation has higher Energy Efficiency Ratio.
To achieve the above object, the invention provides a kind of condensation pressure regulation device, reservoir, one group of valve member and connection are included
Pipeline, at least two interfaces of the reservoir：Reservoir import and reservoir outlet, one group of valve member are placed in the connection
In pipeline, the condensation pressure regulation device also includes first interface, second interface and the 3rd interface；The connecting line is formed
Path include path one, path two, path three and path four；The path one connects the first interface and the reservoir
Import, the path two connects the second interface and the reservoir outlet, and the path three connects the first interface and institute
Second interface is stated, the path four connects the 3rd interface and the reservoir；One group of valve member, institute can be opened simultaneously
Path one is stated, the path two is opened, closes the path three, closes the path four, the path can also be simultaneously closed off
First, the path two is closed, the path three is opened, opens the path four.
Further, one group of valve member, can also simultaneously close off the path one, close the path two, open described logical
Road three, the closing path four.
Further, the path four connects the 3rd interface and the reservoir import, or connect the 3rd interface and
The reservoir outlet.
Further, the path four is provided with throttling arrangement.
Further, the path four is provided with flow regulator.
To achieve the above object, the invention provides a kind of Condensing units, including compressor and condenser, have supply opening and
Air entry, in addition to above-mentioned condensation pressure regulation device, the first interface of the condensation pressure regulation device connect the condensation
The outlet of device, the second interface of the condensation pressure regulation device is communicated with the supply opening, the condensation pressure regulation device
3rd interface is communicated with the air entry.
To achieve the above object, the invention provides a kind of refrigeration system, including compressor, condenser, throttling arrangement and evaporation
Device, in addition to above-mentioned condensation pressure regulation device, the first interface of the condensation pressure regulation device connect the refrigeration system
The outlet of condenser, the second interface of the condensation pressure regulation device connects the entrance of the refrigeration system throttling arrangement, described
3rd interface of condensation pressure regulation device connects the evaporator of the refrigeration system.
To achieve the above object, the invention provides a kind of control method based on above-mentioned refrigeration system：When condensing pressure (temperature
Degree) it is equal to or higher than pressure (temperature) setting value for the moment, control one group of valve member：Open the path one, open described
Path two, the closing path three, the closing path four；When condensing pressure (temperature) is equal to or less than pressure (temperature
) setting value two when, control one group of valve member：The path one is closed, the path two is closed, opens the path three
, open the path four；Pressure (temperature) setting value one is more than the pressure (temperature) setting value two.
Further, when condensing pressure (temperature) is equal to or less than the pressure (temperature) setting value two, control described one
Group valve member：The path one is closed, the path two is closed, opens the path three, opens the path four, then, when
When condensing pressure (temperature) is at or above pressure (temperature) setting value three, one group of valve member is controlled：Close described logical
Lu Yi, the closing path two, the opening path three, the closing path four；Pressure (temperature) setting value three is low
In the pressure (temperature) setting value one, higher than the pressure (temperature) setting value two.
Based on above-mentioned technical proposal, the present invention is by controlling one group of valve member, when condensing pressure is relatively low, cuts off the liquid storage
The connection of device and the condenser and throttling arrangement of refrigeration system, connects the connection of the reservoir and refrigeration system evaporator, simultaneously
The condenser of refrigeration system is directly connected with throttling arrangement and without the reservoir, therefore add the refrigeration in condenser
Agent, improves condensing pressure, while making the refrigerant of condensator outlet has larger degree of supercooling.Compared to existing refrigeration system and
Condensation pressure regulation method, the degree of supercooling when present invention can increase cold season before refrigerant throttling improves system operation effect
Rate.
Brief description of the drawings
Fig. 1 is the theory of constitution schematic diagram of inventive refrigeration system first embodiment.
Fig. 2 is the theory of constitution schematic diagram of inventive refrigeration system second embodiment.
Embodiment
Below in conjunction with drawings and examples, technical scheme is described in further detail.
As shown in figure 1, being the theory of constitution schematic diagram of inventive refrigeration system first embodiment.In the present embodiment, compressor 2
1st, condenser 22, magnetic valve 2, reservoir 1, magnetic valve 3, heating power expansion valve 23, evaporator 24 are sequentially connected, and form one
Loop.In addition, a bypass pipe is set between the outlet of condenser 22 and the import of heating power expansion valve 23, and in this bypass pipe
Upper installation magnetic valve 4.In addition, a bypass pipe is also set between the outlet of reservoir 1 and the import of evaporator 24, and
Magnetic valve 5 and capillary 6 are installed successively on this bypass pipe.In the present embodiment, condenser and evaporator are using air-cooled.
In the case where environment temperature is higher, when refrigeration system works, magnetic valve 4 and magnetic valve 5 are closed, magnetic valve 2 and electromagnetism
Valve 3 is opened, after the compression and low pressure refrigerant gas of compressor 21, is exported the refrigerant gas of HTHP to condenser 22, is freezed
It is changed into highly pressurised liquid after agent is condensed, reservoir 1 is entered after magnetic valve 2, the high pressure refrigerant liquid come out from reservoir 1
After magnetic valve 3, throttled by heating power expansion valve 23, be changed into the two phase refrigerant of low-temp low-pressure, subsequently into evaporator 24,
It is changed into low-pressure gas after heat absorption evaporation, finally enters back into the air entry of compressor 21, forms a complete kind of refrigeration cycle.
With the reduction of environment temperature, when refrigeration system is run, condensing pressure is gradually lowered, when condensing pressure is set less than minimum
During definite value, magnetic valve 2 and magnetic valve 3 are closed, and magnetic valve 4 and magnetic valve 5 are opened, at this moment, the suction of compressor 21 and compression and low pressure
After refrigerant gas, the refrigerant of HTHP is exported to condenser 22, is changed into highly pressurised liquid after refrigerant is condensed, then pass through
Heating power expansion valve 23 is directly entered after magnetic valve 4, is throttled by heating power expansion valve 23, is changed into the two phase refrigerant of low-temp low-pressure, so
Enter evaporator 24 afterwards, be changed into low-pressure gas after heat absorption evaporation, finally enter back into the air entry of compressor 21, form one completely
Kind of refrigeration cycle.It is changed into two-phase refrigeration in addition, highly pressurised liquid in reservoir passes through magnetic valve 5, then after being throttled from capillary 6
Agent, also into low pressure evaporator 24, as the refrigerant in reservoir 1 is fewer and fewer, the refrigerant circulated in refrigeration system is got over
Come more, in the outlet of condenser 22, refrigerant degree of supercooling is increasing, condensing pressure also more and more higher, until condensing pressure
Intermediate settings value is reached, magnetic valve 5 is closed, and reservoir 1 is thoroughly isolated with refrigeration system, the refrigerant amount circulated in refrigeration system
It is not further added by, refrigeration system is stable, because the refrigerant liquid before heating power expansion valve 23 has obvious degree of supercooling, system
Operational efficiency is higher.
When environment temperature is raised again, condensing pressure is also increased, electric until condensing pressure reaches a higher setting value
Magnet valve 2 and magnetic valve 3 are opened, and magnetic valve 4 and magnetic valve 5 are closed, refrigeration system reenter environment temperature it is higher in the case of it is described
Kind of refrigeration cycle.
For low-temperature cold store, in the case where environment temperature is also very low, such as Ku Wen -18 DEG C, at this moment -10 DEG C of environment temperature may be used
With with controlling the technology of cooling air quantity to be used in combination.Because in this case, relying only on above-mentioned embodiment, refrigerant liquid exists
It is into the degree of supercooling before heating power expansion valve 23 very big, and heating power expansion valve is chosen according to the situation without degree of supercooling, may lead
Cause heating power expansion valve control failure, it is in particular possible to compressor air suction band liquid occur.Certainly, if refrigeration system uses electronic expansion
Valve, then in the absence of this problem.In addition, also referring to second embodiment of the invention.
As shown in Fig. 2 being the theory of constitution schematic diagram of inventive refrigeration system second embodiment.For the ease of contrast, first
Refrigeration system in embodiment is referred to as main system.It is additionally arranged from the main system for unlike first embodiment, aiming at first embodiment
One accessory system, accessory system is connected successively by the primary side of compressor 11, condenser 12, capillary 13, plate type heat exchanger 14
Connect and form, meanwhile, before the secondary side access main system heating power expansion valve 23 of plate type heat exchanger 14.
In the case where environment temperature is higher, and unlike first embodiment, accessory system is also run together, so that at this moment hot
Refrigerant liquid before power expansion valve 23 also has larger degree of supercooling, therefore the type selecting of heating power expansion valve 23 can be according to larger supercooling
The situation of degree is chosen.
So when environment temperature is relatively low, accessory system is shut down always, and at this moment although the liquid before heating power expansion valve 23 have compared with serious offense
Cold degree, but it is still reliable to work, refrigeration system is stable, and efficiency is very high.
Finally it should be noted that：Above example is merely to illustrate technical scheme rather than its limitations, affiliated technology
Field it is to be appreciated by one skilled in the art that can still be modified to the embodiment of the present invention or special to portion of techniques
Levy carry out equivalence replacement.So, without departing from the spirit of technical solution of the present invention, it should cover and be claimed in the present invention
Technical scheme scope among.
Claims (10)
1. a kind of condensation pressure regulation device, includes reservoir, one group of valve member and connecting line, it is characterised in that：Include
One interface, second interface and the 3rd interface；At least two interfaces of the reservoir：Reservoir import and reservoir outlet, institute
State one group of valve member to be placed in the connecting line, the path of the connecting line formation includes path one, path two, the and of path three
Path four；The path one connects the first interface and the reservoir import, the path two connect the second interface and
The reservoir outlet, the path three connects the first interface and the second interface, and the path four connects the described 3rd
Interface and the reservoir；One group of valve member, can open simultaneously the path one, open the path two, close it is described
Path three, the closing path four, can also simultaneously close off the path one, close the path two, open the path
3rd, the path four is opened.
2. a kind of condensation pressure regulation device according to claim 1, it is characterised in that：One group of valve member, can be with
The path one is simultaneously closed off, the path two is closed, opens the path three, closes the path four.
3. a kind of condensation pressure regulation device according to claim 2, it is characterised in that：The path four connects described
Three interfaces and the reservoir import.
4. a kind of condensation pressure regulation device according to claim 2, it is characterised in that：The path four connects described
Three interfaces and the reservoir outlet.
5. a kind of condensation pressure regulation device according to claim 3 or 4, it is characterised in that：The path four is provided with
Throttling arrangement.
6. a kind of condensation pressure regulation device according to claim 5, it is characterised in that：The path four is provided with flow
Adjusting means.
7. a kind of Condensing units, including compressor and condenser, there is supply opening and air entry, it is characterised in that：Including
Condensation pressure regulation device described in any one of the claims 1 to 6, the first interface connection of the condensation pressure regulation device
The outlet of the condenser, the second interface of the condensation pressure regulation device is communicated with the supply opening, and the condensing pressure is adjusted
3rd interface of regulating device is communicated with the air entry.
8. a kind of refrigeration system, including compressor, condenser, throttling arrangement, evaporator, it is characterised in that：Including above-mentioned
Condensation pressure regulation device described in any one of claim 1 to 6, the first interface connection of the condensation pressure regulation device is described
The outlet of refrigerant system condenser, the second interface of the condensation pressure regulation device connects entering for the refrigeration system throttling arrangement
Mouthful, the 3rd interface of the condensation pressure regulation device connects the evaporator of the refrigeration system.
9. a kind of control method based on refrigeration system described in the claims 8, it is characterised in that：
When condensing pressure (temperature) is equal to or higher than pressure (temperature) setting value for the moment, one group of valve member is controlled：Open institute
Path one is stated, the path two is opened, closes the path three, closes the path four；
When condensing pressure (temperature) is equal to or less than pressure (temperature) setting value two, one group of valve member is controlled：Close institute
Path one is stated, the path two is closed, opens the path three, opens the path four；
Pressure (temperature) setting value one is more than the pressure (temperature) setting value two.
10. control method according to claim 9, it is characterised in that：
When condensing pressure (temperature) is equal to or less than the pressure (temperature) setting value two, one group of valve member is controlled：Close
The path one is closed, the path two is closed, opens the path three, opens the path four, then, works as condensing pressure
When (temperature) is at or above pressure (temperature) setting value three, one group of valve member is controlled：Close the path one, pass
The path two is closed, the path three is opened, closes the path four；
Pressure (temperature) setting value three is less than the pressure (temperature) setting value one, is set higher than the pressure (temperature)
Definite value two.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610209157.4A CN107289653A (en) | 2016-04-02 | 2016-04-02 | Condensation pressure regulation device, Condensing units, refrigeration system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610209157.4A CN107289653A (en) | 2016-04-02 | 2016-04-02 | Condensation pressure regulation device, Condensing units, refrigeration system and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN107289653A true CN107289653A (en) | 2017-10-24 |
Family
ID=60092798
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610209157.4A Pending CN107289653A (en) | 2016-04-02 | 2016-04-02 | Condensation pressure regulation device, Condensing units, refrigeration system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107289653A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107961754A (en) * | 2017-12-16 | 2018-04-27 | 河南莱帕克化工设备制造有限公司 | Emulsion polymerization pilot experiment system |
| CN112254365A (en) * | 2020-10-20 | 2021-01-22 | 英诺绿能技术(河南)有限公司 | Cascade refrigerating system capable of adjusting refrigerant filling amount |
| CN112413936A (en) * | 2020-11-13 | 2021-02-26 | 珠海格力电器股份有限公司 | Refrigeration system applied to wide-temperature working condition, control method and air conditioner |
-
2016
- 2016-04-02 CN CN201610209157.4A patent/CN107289653A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107961754A (en) * | 2017-12-16 | 2018-04-27 | 河南莱帕克化工设备制造有限公司 | Emulsion polymerization pilot experiment system |
| CN112254365A (en) * | 2020-10-20 | 2021-01-22 | 英诺绿能技术(河南)有限公司 | Cascade refrigerating system capable of adjusting refrigerant filling amount |
| CN112413936A (en) * | 2020-11-13 | 2021-02-26 | 珠海格力电器股份有限公司 | Refrigeration system applied to wide-temperature working condition, control method and air conditioner |
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| PB01 | Publication | ||
| PB01 | Publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20171024 |
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| WD01 | Invention patent application deemed withdrawn after publication |