CN203657308U - Expansion valve control system for refrigerating and heating device - Google Patents
Expansion valve control system for refrigerating and heating device Download PDFInfo
- Publication number
- CN203657308U CN203657308U CN201420018003.3U CN201420018003U CN203657308U CN 203657308 U CN203657308 U CN 203657308U CN 201420018003 U CN201420018003 U CN 201420018003U CN 203657308 U CN203657308 U CN 203657308U
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- China
- Prior art keywords
- expansion valve
- refrigerating
- control system
- compressor
- heating device
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- Expired - Lifetime
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 17
- 239000007788 liquid Substances 0.000 claims description 10
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- 230000001681 protective effect Effects 0.000 abstract 1
- 238000009833 condensation Methods 0.000 description 10
- 230000005494 condensation Effects 0.000 description 10
- 239000012530 fluid Substances 0.000 description 6
- 230000008859 change Effects 0.000 description 5
- 238000001704 evaporation Methods 0.000 description 5
- 239000003507 refrigerant Substances 0.000 description 5
- 230000000694 effects Effects 0.000 description 4
- 230000009467 reduction Effects 0.000 description 4
- 238000005057 refrigeration Methods 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
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- 229910000831 Steel Inorganic materials 0.000 description 1
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- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
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- 230000008901 benefit Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 230000006837 decompression Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000007701 flash-distillation Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
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- 229920006395 saturated elastomer Polymers 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
Images
Abstract
The utility model discloses an expansion valve control system for a refrigerating and heating device. The expansion valve control system comprises an evaporator, a compressor, a fin coil pipe, an expansion valve and an expansion valve drive. The evaporator, the compressor, the fin coil pipe and the expansion valve are orderly connected to form a loop; the expansion valve drive includes a control terminal and a detecting terminal, wherein the control terminal is connected with the expansion valve and the detecting terminal is connected between the evaporator and the compressor, and positioned adjacent to the inlet of the compressor. By adopting the expansion valve control system for the refrigerating and heating device provided by the utility model, temperature and pressure of the compressor and the evaporator are more stable, drastic fluctuation of temperature and pressure is avoided, and thus a protective system is avoided stopping running.
Description
Technical field
The utility model relates to a kind of intelligent air-cooled unit, more particularly, relates to a kind of expansion valve control system for refrigerating/heating device.
Background technology
In common air-cooled unit, according to environment temperature and wind-force, custom system load value changes, and condenser control system must regulate condensation capacity, the blower fan quantity of moving by change and their rotating speed.Run duration, if condensation temperature is unstable, system has same shortcoming.Particularly, when condensation capacity increases suddenly, condensation temperature and pressure reduction Pc reduce, and the pressure reduction that expansion valve can be used reduces, the refrigerant flow in addition simultaneously reducing, evaporation/pressure of inspiration(Pi) Pc.In addition, after then capacity increases, the fluid temperature that condensing pressure minimizing still enters valve can not change, because in condenser outside, it has higher temperature rapid condensation, starts flash distillation/boiling before entering valve.Because its density reduces, valve ability reduces flow and pressure of inspiration(Pi) even more, causes higher evaporator superheat and reduces system effectiveness.
When condensation capacity reduces suddenly, there will be contrary phenomenon.The available pressure of expansion valve increases, the same refrigerant flow in addition increasing, evaporating temperature.Therefore suction superheat reduces, and partially liq can enter compressor and affects the reliability of system effectiveness and compressor.
Existing air-blower control solution has following conventionally:
1. ON/OFF control blower fan.This is the most cheap control but is also that effect is the poorest, most critical be that condensation temperature can significantly change.If more than one of blower fan quantity, controls meeting classification, thereby reduce the impact on condensation temperature, but suction superheat is still unstable.
2. auto-transformer speed Control and grading control.But the higher effect of the method cost also can be better.But suction superheat remains unchanged unstable particularly in the time of lower environment temperature or system loading.
3. use controller to continue speed change, similar rear along phased or frequency converter: but this is the most expensive is also that effect is best.Only have when load or environment temperature is very low and when the ON/OFF pattern of controlling run in minimum speed level.
Utility model content
The purpose of this utility model aims to provide a kind of expansion valve control system for refrigerating/heating device, solves the impact on compressor efficiency and reliability causing due to the pressure and temperature in running in prior art.
According to the utility model, a kind of expansion valve control system for refrigerating/heating device is provided, comprise evaporimeter, compressor, finned coil, expansion valve, expansion valve driver.Evaporimeter, compressor, finned coil and expansion valve are in turn connected to form a loop, and expansion valve driver comprises control end and test side, and control end is connected with expansion valve, and test side is connected between evaporimeter and compressor, are positioned near the import of compressor.
According to an embodiment of the present utility model, also comprise the first blower fan and the second blower fan, the first blower fan and the second blower fan are installed along the direction of the heat exchange of finned coil.
According to an embodiment of the present utility model, also comprise controller of fan, controller of fan is connected with the second blower fan with the first blower fan respectively.
According to an embodiment of the present utility model, controller of fan also comprises the first pressure sensor, and the first pressure sensor is arranged between finned coil and expansion valve, near near the outlet of finned coil.
According to an embodiment of the present utility model, expansion valve driver also comprises receiving the signaling interface of the signal of telecommunication, and signaling interface is electrically connected with controller of fan.
According to an embodiment of the present utility model, the test side of expansion valve driver arranges the second pressure sensor and temperature sensor.
According to an embodiment of the present utility model, evaporimeter comprises a liquid inlet and a liquid outlet.
Adopt the technical solution of the utility model, can make the temperature and pressure of compressor and evaporimeter more stable, avoided the big ups and downs of temperature and pressure, thereby avoid protection system out of service.
Brief description of the drawings
In the utility model, identical Reference numeral represents identical feature all the time, wherein:
Fig. 1 is the structural representation of the utility model for the expansion valve control system of refrigerating/heating device.
Detailed description of the invention
Further illustrate the technical solution of the utility model below in conjunction with drawings and Examples.
With reference to Fig. 1, the utility model discloses a kind of expansion valve 5 control systems for refrigerating/heating device, comprises evaporimeter 1, compressor 4, finned coil 7, expansion valve 5, expansion valve driver 6, the first blower fan 8, the second blower fan 9 and controller of fan 10.The utility model is applicable to the steam compression type air-cooled unit for regulating air, refrigeration or technology application, such as refrigeration machine, and contrary circulating heat pump or energy raiser etc.
As shown in Figure 1, evaporimeter 1, compressor 4, finned coil 7 and expansion valve 5 are in turn connected to form a loop, and evaporimeter 1 can have arbitrary dimension, and no matter no matter how many blower fans, be that single or multiple finned coils 7 design.Evaporimeter 1 can be air-water, air-air, or air and any one fluid heat transfer.As a kind of embodiment of the present utility model, evaporimeter 1 is the heat exchanger of the fluid of the inner cold-producing medium of circulation and the use of user's side.Evaporimeter 1 can be shell-tube type, board-like or other forms of heat exchanger.
Expansion valve driver 6 comprises control end, test side and in order to receive the signaling interface of the signal of telecommunication.As shown in Figure 1, control end is connected with expansion valve 5, and test side is connected between evaporimeter 1 and compressor 4, is positioned near the import of compressor 4, and test side arranges the second pressure sensor and temperature sensor, and signaling interface is electrically connected with controller of fan 10.
Liquid refrigerant flows through electric expansion valve 5, by the adjustable orifice step-down of expansion valve 5.The aperture of expansion valve 5 is controlled according to the degree of superheat by expansion valve driver 6, uses air entry pressure and temperature Ps, Ts can calculate cold-producing medium and exports and the degree of superheat of compressor 4 imports at evaporimeter 1.
Finned coil 7 is heat exchangers of the fluid (normally air) of the inner cold-producing medium of circulation and the fin surface of flowing through.Finned coil 7 can be fin and the pipe of any material, such as aluminium, and copper, steel etc.Fluid is driven by the first blower fan 8 and the second blower fan 9, and the first blower fan 8 and the second blower fan 9 are installed along the direction of the heat exchange of finned coil 7, and then the pressure drop that the pressure reduction that ventilating system produces exceedes in heat exchanger forces fluid to pass through.
Continue with reference to Fig. 1, the first blower fan 8 and the second blower fan 9 are normally opened, and according to pressure P c, control by manual or electronic controller of fan 10, and the first blower fan 8 is connected with controller of fan 10 respectively with the second blower fan 9.Controller of fan 10 also comprises the first pressure sensor, and the first pressure sensor is arranged between finned coil 7 and expansion valve 5, near near the outlet of finned coil 7.
As a kind of embodiment of the present utility model, the first blower fan 8 and the second blower fan 9 can be axially, centrifugal, radially or other forms.In handpiece Water Chilling Units, the cold-producing medium of HTHP enters finned coil 7, reject heat in air, and cooling, condensation, reached cold phase.Under normal and stable operating mode, the cold-producing medium in exit is liquid condition.
Connect by structure as shown in Figure 1, controller of fan 10 can be delivered to expansion valve driver 6 by the information of fan condition, and the information of transmitting here can be based on analog signal, data signal or band consensus standard or self-defining other signal types.Expansion valve driver 6 receives useful signal and adjusts in advance expansion valve 5 positions, stops evaporating pressure and crosses thermal change.
For example, if blower fan is the control of ON/OFF two-stage, unit moves under middle temperature environment, and the first blower fan 8 is opened, and the second blower fan 9 cuts out, and opens the second blower fan 9 until pressure P c approaches setting value.If load or environment temperature increase, pressure P c also can increase and exceed setting value.Controller of fan 10 is opened the second blower fan 9-a decompression is provided, but send information to expansion valve driver 6 forces expansion valve 5 to be opened sooner simultaneously, and therefore stops the variation of evaporating pressure Ps.If pressure P c reduces, will there will be contrary phenomenon, controller of fan 10 is closed the second blower fan 9 and is sent information to expansion valve driver 6, forces expansion valve 5 to be closed sooner and stops Ps to reduce.Like this, can limit or stop at the first blower fan 8, the second blower fan 9 is overheated during ON/OFF large variation, and therefore can increase the reliability of system energy efficiency and compressor 4.
An other benefit of the utility model is to keep evaporating temperature more stable, and refrigerating capacity keeps less fluctuation, and leaving water temperature is more stable.Under maximum conditions---minimum load and environment temperature, can avoid pressure P s to reduce excessive, to such an extent as to the minimum of a value that pressure P s can bear than compressor 4 is also low, therefore avoids protection system out of service.
Those of ordinary skill in the art will be appreciated that, above description is only one or more embodiments in the numerous embodiment of the utility model, and not uses restriction of the present utility model.Any equalization variation, modification for the above embodiment and be equal to the technical schemes such as alternative, as long as meet connotation scope of the present utility model, all will drop in the scope that claims of the present utility model protect.
Claims (7)
1. for an expansion valve control system for refrigerating/heating device, it is characterized in that, comprising:
Evaporimeter, compressor, finned coil, expansion valve, expansion valve driver;
Described evaporimeter, compressor, finned coil and described expansion valve are in turn connected to form a loop;
Described expansion valve driver comprises control end and test side, and described control end is connected with described expansion valve, and described test side is connected between described evaporimeter and described compressor, is positioned near the import of described compressor.
2. the expansion valve control system for refrigerating/heating device as claimed in claim 1, is characterized in that, also comprises the first blower fan and the second blower fan, and described the first blower fan and described the second blower fan are installed along the direction of the heat exchange of described finned coil.
3. the expansion valve control system for refrigerating/heating device as claimed in claim 2, is characterized in that, also comprises controller of fan, and described controller of fan is connected with described the second blower fan with described the first blower fan respectively.
4. the expansion valve control system for refrigerating/heating device as claimed in claim 3, it is characterized in that, described controller of fan also comprises the first pressure sensor, described the first pressure sensor is arranged between described finned coil and described expansion valve, near near the outlet of described finned coil.
5. the expansion valve control system for refrigerating/heating device as claimed in claim 3, is characterized in that, described expansion valve driver also comprises receiving the signaling interface of the signal of telecommunication, and described signaling interface is electrically connected with described controller of fan.
6. the expansion valve control system for refrigerating/heating device as claimed in claim 1, is characterized in that, the test side of described expansion valve driver arranges the second pressure sensor and temperature sensor.
7. the expansion valve control system for refrigerating/heating device as claimed in claim 1, is characterized in that, described evaporimeter comprises a liquid inlet and a liquid outlet.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420018003.3U CN203657308U (en) | 2014-01-13 | 2014-01-13 | Expansion valve control system for refrigerating and heating device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420018003.3U CN203657308U (en) | 2014-01-13 | 2014-01-13 | Expansion valve control system for refrigerating and heating device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203657308U true CN203657308U (en) | 2014-06-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420018003.3U Expired - Lifetime CN203657308U (en) | 2014-01-13 | 2014-01-13 | Expansion valve control system for refrigerating and heating device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203657308U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712389A (en) * | 2014-01-13 | 2014-04-09 | 克莱门特捷联制冷设备(上海)有限公司 | Expansion valve control system for refrigerating/heating device |
| CN104534742A (en) * | 2014-12-30 | 2015-04-22 | 克莱门特捷联制冷设备(上海)有限公司 | Optimized cooling loop of module heat pump unit |
-
2014
- 2014-01-13 CN CN201420018003.3U patent/CN203657308U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103712389A (en) * | 2014-01-13 | 2014-04-09 | 克莱门特捷联制冷设备(上海)有限公司 | Expansion valve control system for refrigerating/heating device |
| CN103712389B (en) * | 2014-01-13 | 2016-05-25 | 克莱门特捷联制冷设备(上海)有限公司 | For the expansion valve control system of refrigerating/heating device |
| CN104534742A (en) * | 2014-12-30 | 2015-04-22 | 克莱门特捷联制冷设备(上海)有限公司 | Optimized cooling loop of module heat pump unit |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140618 |