CN202778522U - Low-temperature constant-temperature box - Google Patents
Low-temperature constant-temperature box Download PDFInfo
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- CN202778522U CN202778522U CN 201220377791 CN201220377791U CN202778522U CN 202778522 U CN202778522 U CN 202778522U CN 201220377791 CN201220377791 CN 201220377791 CN 201220377791 U CN201220377791 U CN 201220377791U CN 202778522 U CN202778522 U CN 202778522U
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- temperature
- heater
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- control
- electric
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Abstract
The utility model provides a low-temperature constant-temperature box, comprising a heating device and a refrigerating device. The heating device comprises a heater, a power adjusting device and an electric control switch; the electric control switch is connected between the heater and the power adjusting device, and can be used for changing the working state of the heater through the switching on/off of the electric control switch; the refrigerating device comprises a refrigerating unit, a throttling device, an evaporator and a control valve, which are electrically connected in sequence; and the control valve controls an own switching period according to a set temperature value so as to control an evaporation flow of the evaporator. In conclusion, when the low-temperature constant-temperature box keeps low-temperature control, the electric switch is switched off, and the heating device stops supplying heat inside the low-temperature constant-temperature box; and in a refrigerating device, the automatic control valve automatically adjusts the switching period and controls the evaporation flow of the evaporator, so that the temperature inside the low-temperature constant-temperature box is kept stable; the heat-cold mutual consumption inside the box can be removed; and the electric energy can be realized.
Description
Technical field
The utility model relates to a kind of chamber, particularly relates to a kind of cryostat.
Background technology
Cryostat is usually used in the check of Aerospace Products, information electronic instrument and meter, material, electrician, electronic product, various electronic devices and components various performance indications under low temperature environment, guarantees the repeatability of environmental condition in environmental test.
Traditional cryostat comprises heater and refrigerating plant, described heater comprises the heater that heat is provided, the PCU Power Conditioning Unit of regulating heater power, described heater and refrigerating plant adopt PID(proportion-integration-differentiation, proportional-integral-differential) control mode control, described refrigerating plant comprises refrigeration unit, keep the throttling arrangement of constant refrigerating capacity and be used for the evaporimeter of liquid evaporation.During work, adopt balance temperature adjustment control, the refrigerating capacity of throttling arrangement is constant, and refrigerating plant continues to provide cold air in cryostat; The heating power of PCU Power Conditioning Unit control heater and heater continue to provide heat in cryostat, and under the control of PID controller, accurately the control heating power makes heater and refrigerating plant power-balance, keeps the stable of cryogenic thermostat the temperature inside the box.
Yet, when traditional cryostat is kept low temperature control, when refrigerating plant provides cold air in the cryostat, heater does not quit work and provide heat in cryostat, also freeze in the time of heating, cause undoubtedly cold and hot in-fighting, the waste electric energy.
The utility model content
Based on this, be necessary that for cold and hot in-fighting the problem of waste electric energy provides a kind of cryostat.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of cryostat, comprise heater and refrigerating plant, described heater comprises heater, PCU Power Conditioning Unit and electric-controlled switch, described electric-controlled switch is connected between heater and the PCU Power Conditioning Unit, and can change by the break-make that changes electric-controlled switch the duty of heater, described refrigerating plant comprises the refrigeration unit that is electrically connected successively, throttling arrangement, evaporimeter and control valve, described control valve are controlled the make and break period of self with control evaporator evaporation flow according to the temperature value of setting.
Among embodiment, described heater and refrigerating plant adopt the control of PID control device therein.
In sum, when the utility model cryostat keeps low temperature control, electric-controlled switch disconnects, heater stop provides heat in cryostat, in the refrigerating plant, autocontrol valve is regulated make and break period control evaporator evaporation flow automatically, keeps the stable of cryogenic thermostat the temperature inside the box, eliminate cold and hot mutual consumption in the case, reach and save the electric energy purpose.
Description of drawings
Fig. 1 is the connection diagram of the utility model cryostat.
The specific embodiment
Below in conjunction with accompanying drawing enforcement of the present utility model is elaborated.
See also Fig. 1, the utility model cryostat comprises heater 10 and refrigerating plant 20, and described heater 10 and refrigerating plant 20 adopt the control of PID control system.
Described heater 10 comprises the heater 11 that heat is provided, PCU Power Conditioning Unit 12 and the electric-controlled switch 13 of regulating heater 11 power, described electric-controlled switch 13 is connected between heater 11 and the PCU Power Conditioning Unit 12, and can change by the break-make that changes electric-controlled switch 13 duty of heater 11, particularly, when the cryostat domestic demand keeps low temperature, electric-controlled switch 13 is off-state, and heater 11 quits work; Otherwise PCU Power Conditioning Unit 12 control heaters 11 provide heat in cryostat, improve the temperature in the cryostat.
Described refrigerating plant 20 comprises the refrigeration unit 21 that is electrically connected successively, the throttling arrangement 22 of keeping constant refrigerating capacity, evaporimeter 23 and control valve 24, described control valve 24 is controlled the make and break period of self with control evaporimeter 23 evaporation flows according to the temperature value of setting.
When the work of the utility model cryostat keeps low temperature control, under the control of PID control system, electric-controlled switch 13 disconnects, cut off heating circuit, in refrigerating plant, the PID control system is detected temperatures circularly, and and design temperature setting value make comparisons, control valve 24 is regulated make and break period automatically, with control evaporimeter 23 evaporation flows, keeps the stable of cryogenic thermostat the temperature inside the box.
In sum, when the utility model cryostat keeps low temperature control, electric-controlled switch 13 disconnects, heater 10 stops to provide heat in cryostat, in the refrigerating plant 20, control valve 24 is regulated make and break period control evaporimeter 23 evaporation flows automatically, keeps the stable of cryogenic thermostat the temperature inside the box, eliminate cold and hot mutual consumption in the case, reach and save the electric energy purpose.
Claims (2)
1. cryostat, comprise heater (10) and refrigerating plant (20), it is characterized in that: described heater (10) comprises heater (11), PCU Power Conditioning Unit (12) and electric-controlled switch (13), described electric-controlled switch (13) is connected between heater (11) and the PCU Power Conditioning Unit (12), and can change by the break-make that changes electric-controlled switch (13) duty of heater (11), described refrigerating plant (20) comprises the refrigeration unit (21) that is electrically connected successively, throttling arrangement (22), evaporimeter (23) and control valve (24), described control valve (24) is according to the make and break period of the temperature value control of setting self.
2. cryostat as claimed in claim 1 is characterized in that: described heater and the control of refrigerating plant employing PID control systems.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220377791 CN202778522U (en) | 2012-07-31 | 2012-07-31 | Low-temperature constant-temperature box |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220377791 CN202778522U (en) | 2012-07-31 | 2012-07-31 | Low-temperature constant-temperature box |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202778522U true CN202778522U (en) | 2013-03-13 |
Family
ID=47805867
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220377791 Expired - Fee Related CN202778522U (en) | 2012-07-31 | 2012-07-31 | Low-temperature constant-temperature box |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202778522U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551218A (en) * | 2013-12-03 | 2014-02-05 | 金陵科技学院 | Incubator based on PID (Proportion Integration Differentiation) control |
| CN105387643A (en) * | 2015-12-22 | 2016-03-09 | 重庆泰思特试验仪器有限公司 | Constant-temperature control system for high- and low-temperature and low-air-pressure test box |
-
2012
- 2012-07-31 CN CN 201220377791 patent/CN202778522U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103551218A (en) * | 2013-12-03 | 2014-02-05 | 金陵科技学院 | Incubator based on PID (Proportion Integration Differentiation) control |
| CN103551218B (en) * | 2013-12-03 | 2015-04-29 | 金陵科技学院 | Incubator based on PID (Proportion Integration Differentiation) control |
| CN105387643A (en) * | 2015-12-22 | 2016-03-09 | 重庆泰思特试验仪器有限公司 | Constant-temperature control system for high- and low-temperature and low-air-pressure test box |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20130313 Termination date: 20150731 |
|
| EXPY | Termination of patent right or utility model |