CN104654682A - Environmental testing apparatus - Google Patents
Environmental testing apparatus Download PDFInfo
- Publication number
- CN104654682A CN104654682A CN201310594524.3A CN201310594524A CN104654682A CN 104654682 A CN104654682 A CN 104654682A CN 201310594524 A CN201310594524 A CN 201310594524A CN 104654682 A CN104654682 A CN 104654682A
- Authority
- CN
- China
- Prior art keywords
- temperature side
- high temperature
- bypass
- temperature
- test equipment
- 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.)
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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
- F25B41/00—Fluid-circulation arrangements
- F25B41/30—Expansion means; Dispositions thereof
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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
- F25B2600/00—Control issues
- F25B2600/25—Control of valves
- F25B2600/2513—Expansion valves
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- 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 relates to an environmental testing apparatus. The environmental testing apparatus comprises a test camber, an air conditioning assembly connected with the test chamber and capable of controlling temperatures, a freezing circuit connected with the air conditioning assembly, and an electrical control assembly connected to the previous parts by use of a circuit; the freezing circuit comprises a high-temperature side circuit and a low-temperature side circuit; the low-temperature side circuit comprises a low-temperature side compressor, a low-temperature electronic expansion valve, a low-temperature evaporator, a hot gas bypass and a high-temperature bypass; the high-temperature bypass comprises a high-temperature bypass electronic expansion valve and a high-temperature bypass electromagnetic valve. The control state of the environmental testing apparatus is of linear change and the cooling effect of the apparatus is present mildly; stepless regulation can be achieved, and overlarge or over-low cooling capability can be effectively prevented.
Description
Technical field
The present invention relates to a kind of environmental test equipment.
Background technology
Over the years, the requirement of environmental test is more and more higher.Especially the maximization of testing equipment, the requirement of variations in temperature constantly increases.In order to reach these requirements, the example of Large Copacity refrigerating circuit (refrigerating circuit of more than power 10Hp) is in recent years used to rise significantly.Adopt Large Copacity refrigerating circuit, achieve the thermic load process occurred frequently in low-temperature test, the requirement for height of the quick temperature change of 10 DEG C per minute etc.
The large-scale freezing equipment unit that quick temperature becomes, the instructions for use of user is varied, has high temperature and low temperature.Corresponding different temperature, the operating mode of compressor is completely different.In order to ensure the stable operation of compressor, need to cool compressor.Traditional cooling compressor loop adopts capillary or heating power expansion valve.Both has good effect for cooling, and with low cost.But its cooling circuit controlled is very fineless and smooth, cooling controls stepped change, and nonlinear change, cause cooling capacity excessive or too small, nonideal state, is not suitable for and requires high auto industry, aerospace industry or army's industry etc. to environment temperature control change.This type of user requires that variations in temperature is on controlled track, and namely variations in temperature can accomplish step-less adjustment.Even and if existing environmental test equipment will adjust to very desirable state, a large amount of data of manually carrying out also are needed to grope debugging.This is concerning onsite application person, and operating technology requires very high, nor convenient.
Summary of the invention
The problem to be solved in the present invention is to provide a kind of environmental test equipment, and its state of a control is linear change, and cooling effect presents gently, can accomplish step-less adjustment, effectively prevents cooling capacity excessive or too small.
For reaching above-mentioned purpose, provide following technical scheme:
A kind of environmental test equipment, it air-condition assembly, refrigerating circuit of being connected with described air-condition assembly of temperature controllable of comprising laboratory, being connected with described laboratory, and circuit connects the electric controling assembly of above-mentioned various piece; Described refrigerating circuit comprises high temperature side loop and low temperature side loop; Described low temperature side loop comprises low temperature side compressor that pipeline connects, cryotronics expansion valve, cryogenic vaporizer, hot-gas bypass and high temperature bypass; Described high temperature bypass comprises high temperature bypass electric expansion valve and high temperature bypass magnetic valve.
As a preferred scheme, described high temperature side loop is connected by plate type heat exchanger or Intermediate Heat Exchanger with described low temperature side loop.
As another preferred scheme, described hot-gas bypass comprises hot gas bypass solenoid valve and the capacity adjusting valve of pipeline connection.
As another preferred scheme, described high temperature side loop comprises high temperature side compressor, condenser and the expansion valve that pipeline connects.
As another preferred scheme, described air-condition assembly comprises pressure fan, heater and evaporimeter.
As another preferred scheme, described low temperature side loop also comprises relief circuit, and described relief circuit comprises expansion vessel and constant pressure valve.Described relief circuit can be used for regulating the air pressure in described low temperature survey time road, and when air pressure is too high, described expansion vessel receives certain gas, releases the pressure, and when after the pressure drop in described low temperature survey time road, described expansion vessel discharges gas again.
Compared with prior art, the advantage of environmental test equipment of the present invention is: described high temperature bypass have employed described high temperature bypass electric expansion valve, instead of the capillary or heating power expansion valve that adopt in prior art, control the chilling temperature to described low temperature side compressor.
According to the change of described low temperature side compressor exit temperature, by regulating described high temperature bypass electric expansion valve, linear adjustment can be carried out to the ability of described refrigerating circuit.The i.e. step-less adjustment of ability from 0% to 100%, control ability is fine and smooth, and make in the adjustment process of described refrigerating circuit, namely described low temperature side compressor can ensure stable operating mode, also due to the capacity adjustment of described high temperature bypass, the loss of described low temperature side compressor capacity can not be caused.Cooling effect presents gently, effectively prevents cooling capacity excessive or too small.Solve the consumption of a large amount of man power and materials on chilling temperature controls simultaneously.
Accompanying drawing explanation
Reader, after having read the specific embodiment of the present invention with reference to accompanying drawing, will become apparent various aspects of the present invention.Wherein,
Fig. 1 is schematic perspective view of the present invention;
Fig. 2 is the conspectus of described refrigerating circuit of the present invention.
Detailed description of the invention
In order to more clearly understand technology contents of the present invention, with reference to the accompanying drawings, embodiments of the present invention are described in further detail.
A kind of environmental test equipment, its air-condition assembly 2, refrigerating circuit 3 of being connected with air-condition assembly 2 of temperature controllable of comprising laboratory 1, being connected with laboratory 1, and circuit connects the electric controling assembly 4 of above-mentioned various piece.Refrigerating circuit 3 comprises high temperature side loop 5 and low temperature side loop 6.Low temperature side loop 6 comprises low temperature side compressor 7 that pipeline connects, cryotronics expansion valve 8, cryogenic vaporizer 9, hot-gas bypass 10, high temperature bypass 11 and expansion vessel 20 and constant pressure valve 21.High temperature bypass 11 comprises high temperature bypass electric expansion valve 12 and high temperature bypass magnetic valve 13.High temperature side loop 5 is connected by plate type heat exchanger 14 with low temperature side loop 6.Hot-gas bypass 10 comprises hot gas bypass solenoid valve 15 and the capacity adjusting valve 16 of pipeline connection.High temperature side loop 5 comprises high temperature side compressor 17, condenser 18 and the expansion valve 19 that pipeline connects.
According to the change of low temperature side compressor 7 outlet temperature, by regulating high temperature bypass electric expansion valve 12, linear adjustment can be carried out to the ability of refrigerating circuit 3.The i.e. step-less adjustment of ability from 0% to 100%, control ability is fine and smooth, and make in the adjustment process of refrigerating circuit 3, namely low temperature side compressor 7 can ensure stable operating mode, also due to the capacity adjustment of high temperature bypass 11, can not cause low temperature side compressor 7 capacity loss.Electric controling assembly 4 can according to the temperature of low temperature side compressor outlet feedback, regulate high temperature bypass electric expansion valve 12, such as too high, or exceed certain temperature, requirement degree strengthens, high temperature bypass electric expansion valve 12 speed is uprised, makes low temperature side compressor 7 reply reasonably stability operating mode as early as possible.Reach cooling effect to present gently, effectively prevent cooling capacity excessive or too small.Solve the consumption of a large amount of man power and materials on chilling temperature controls simultaneously.
Be described above the specific embodiment of the present invention.But those of ordinary skill in the art can be understood, when without departing from the spirit and scope of the present invention, various change and replacement can also be done to the specific embodiment of the present invention.These change and replacement all drops in the scope of claims of the present invention restriction.
Claims (6)
1. an environmental test equipment, it air-condition assembly, refrigerating circuit of being connected with described air-condition assembly of temperature controllable of comprising laboratory, being connected with described laboratory, and circuit connects the electric controling assembly of above-mentioned various piece; Described refrigerating circuit comprises high temperature side loop and low temperature side loop; Described low temperature side loop comprises low temperature side compressor that pipeline connects, cryotronics expansion valve, cryogenic vaporizer, hot-gas bypass and high temperature bypass; It is characterized in that: described high temperature bypass comprises high temperature bypass electric expansion valve and high temperature bypass magnetic valve.
2. environmental test equipment according to claim 1, is characterized in that: described high temperature side loop is connected by plate type heat exchanger or Intermediate Heat Exchanger with described low temperature side loop.
3. environmental test equipment according to claim 1, is characterized in that: described hot-gas bypass comprises hot gas bypass solenoid valve and the capacity adjusting valve of pipeline connection.
4. the environmental test equipment according to claim 1 or 2 or 3, is characterized in that: described high temperature side loop comprises high temperature side compressor, condenser and the expansion valve that pipeline connects.
5. the environmental test equipment according to claim 1 or 2 or 3, is characterized in that: described air-condition assembly comprises pressure fan, heater and evaporimeter.
6. the environmental test equipment according to claim 1 or 2 or 3, is characterized in that: described low temperature side loop also comprises relief circuit, and described relief circuit comprises expansion vessel and constant pressure valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310594524.3A CN104654682A (en) | 2013-11-21 | 2013-11-21 | Environmental testing apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310594524.3A CN104654682A (en) | 2013-11-21 | 2013-11-21 | Environmental testing apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN104654682A true CN104654682A (en) | 2015-05-27 |
Family
ID=53246103
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310594524.3A Pending CN104654682A (en) | 2013-11-21 | 2013-11-21 | Environmental testing apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN104654682A (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090114832A (en) * | 2008-04-30 | 2009-11-04 | 엘지전자 주식회사 | Multi-type air condition and the control method |
| CN201983514U (en) * | 2011-02-17 | 2011-09-21 | 中国人民解放军63956部队 | Cold start environmental test chamber |
| CN202304098U (en) * | 2011-11-10 | 2012-07-04 | 北京永源热泵有限责任公司 | Superhigh-temperature water source heat pump unit |
| CN102794206A (en) * | 2011-05-26 | 2012-11-28 | 上海爱斯佩克环境设备有限公司 | Environmental test equipment with large-capacity refrigeration system and control method for environment test equipment |
| WO2013069043A1 (en) * | 2011-11-07 | 2013-05-16 | 三菱電機株式会社 | Air-conditioning apparatus |
| CN203672003U (en) * | 2013-11-21 | 2014-06-25 | 上海爱斯佩克环境设备有限公司 | Environmental testing equipment |
-
2013
- 2013-11-21 CN CN201310594524.3A patent/CN104654682A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20090114832A (en) * | 2008-04-30 | 2009-11-04 | 엘지전자 주식회사 | Multi-type air condition and the control method |
| CN201983514U (en) * | 2011-02-17 | 2011-09-21 | 中国人民解放军63956部队 | Cold start environmental test chamber |
| CN102794206A (en) * | 2011-05-26 | 2012-11-28 | 上海爱斯佩克环境设备有限公司 | Environmental test equipment with large-capacity refrigeration system and control method for environment test equipment |
| WO2013069043A1 (en) * | 2011-11-07 | 2013-05-16 | 三菱電機株式会社 | Air-conditioning apparatus |
| CN202304098U (en) * | 2011-11-10 | 2012-07-04 | 北京永源热泵有限责任公司 | Superhigh-temperature water source heat pump unit |
| CN203672003U (en) * | 2013-11-21 | 2014-06-25 | 上海爱斯佩克环境设备有限公司 | Environmental testing equipment |
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| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20150527 |
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| RJ01 | Rejection of invention patent application after publication |