CN205627990U - High low temperature test box low -temperature constant -temperature device - Google Patents
High low temperature test box low -temperature constant -temperature device Download PDFInfo
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- CN205627990U CN205627990U CN201620266957.5U CN201620266957U CN205627990U CN 205627990 U CN205627990 U CN 205627990U CN 201620266957 U CN201620266957 U CN 201620266957U CN 205627990 U CN205627990 U CN 205627990U
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- low temperature
- electromagnetic valve
- control system
- test chamber
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Abstract
High low temperature test box low -temperature constant -temperature device, including the compressor, its exhaust high temperature high -pressure gas gets back to the suction port of compressor through condenser, drying device, B solenoid valve, flow controller and evaporimeter in proper order, by the entry of condenser to being equipped with the A solenoid valve the entry of evaporimeter, proof box inner loop wind exit is equipped with temperature sensing device, temperature sensing device transmission temperature signal gives control system, control system controls A solenoid valve and B solenoid valve alternate movement according to temperature signal's the condition. The utility model discloses remain the constancy of temperature throughout, and avoid the evaporimeter to frost, the life and the improvement constant temperature precision of extension equipment, save the heater arrangement of evaporimeter top at the invariable during operation of low temperature, practiced thrift the electric energy.
Description
Technical field
This utility model belongs to high-low temperature test chamber field, especially relates to a kind of high-low temperature test chamber low temperature
Thermostat.
Background technology
High-low temperature test chamber as a kind of test tools testing product reliability, be widely used in aviation,
Space flight, military project, electronics, communication, machinery, automobile, motorcycle, biology, agricultural, weather, environmental protection,
The fields such as building materials, the temperature constancy of high-low temperature test chamber for some to the stricter neck of temperature requirement
The performance test of the product in territory has great importance, and once the range of error of temperature constant the most greatly will shadow
Ring the performance test results of the product in some field, so the constant-temperature precision of high-low temperature test chamber is to evaluate it
One important indicator of performance quality, also there is the problem of evaporimeter frosting in high-low temperature test chamber, so
How to design a kind of constant-temperature precision height and avoid the high-low temperature test chamber constant thermal apparatus at low temperature of evaporimeter frosting
Become the problem of those skilled in the art's research.
Utility model content
In view of this, this utility model is directed to a kind of constant-temperature precision height and avoids the height of evaporimeter frosting
Low-temperature test chamber constant thermal apparatus at low temperature.
For reaching above-mentioned purpose, the technical solution of the utility model is achieved in that
A kind of high-low temperature test chamber constant thermal apparatus at low temperature, including compressor, the high temperature that described compressor is discharged
The most condensed device of gases at high pressure, drying device, B electromagnetic valve, reducer and vaporizer return to compressor
Entrance, by being provided with A electromagnetic valve, described examination the entrance of described condenser to the entrance of described vaporizer
Tryoff circulated air exit is provided with temperature sensing device, and described temperature sensing device transmission temperature signal gives control
System processed, described control system according to the situation of temperature, pressure signal by controlling A electromagnetic valve and B electromagnetism
Valve alternating movement.
Described drying device is device for drying and filtering.
Described temperature, pressure induction installation is temperature sensors of high precision.
Described control system uses instrument control Special temp controller module FA211 or FA200 to control.
Described reducer is capillary tube.
Relative to prior art, high-low temperature test chamber constant thermal apparatus at low temperature described in the utility model have with
Lower advantage:
High-low temperature test chamber constant thermal apparatus at low temperature the most of the present utility model passes through temperature sensing device and control
System is controlled, and constant-temperature precision is high；The input of vaporizer has two-way supply simultaneously, and a road is warp
Crossing condenser and drying device and the low temperature low pressure gas of rearmounted reducer, a road is discharged by compressor
High temperature and high pressure gas, the RST that control system gathers according to temperature sensing device controls A, B electromagnetism
Valve links, and when i.e. temperature is less than setting value, closes B electromagnetic valve, starts A electromagnetic valve simultaneously, and temperature is high
When setting value, start B electromagnetic valve, simultaneously close off A electromagnetic valve, remain temperature constant, and keep away
Exempt from evaporimeter frosting, the service life of extension device and raising constant-temperature precision；
2. eliminate the heater assembly above vaporizer, saves energy；
3. drying device has filtering function can adsorb steam, filter granule foreign etc., extends further
Service life of equipment.
Accompanying drawing explanation
The accompanying drawing constituting a part of the present utility model is further appreciated by of the present utility model for providing,
Schematic description and description of the present utility model is used for explaining this utility model, is not intended that this reality
With novel improper restriction.In the accompanying drawings:
Fig. 1 is structural representation of the present utility model.
Detailed description of the invention
It should be noted that in the case of not conflicting, in embodiment in this utility model and embodiment
Feature can be mutually combined.
In description of the present utility model, it is to be understood that term " " center ", " longitudinally ", " horizontal stroke
To ", " on ", D score, "front", "rear", "left", "right", " vertically ", " water
Flat ", the orientation that indicates of " top ", " end ", " interior ", " outward " etc. or position relationship be based on attached
Orientation shown in figure or position relationship, be for only for ease of description this utility model and simplify description, and not
Be instruction or the hint device of indication or element must have specific orientation, with specific azimuth configuration and
Operation, therefore it is not intended that to restriction of the present utility model.Additionally, term " first ", " second "
Etc. being only used for describing purpose, and it is not intended that instruction or hint relative importance or implicit indicate indication
The quantity of the technical characteristic shown.Thus, the feature defining " first ", " second " etc. can be expressed
Or implicitly include one or more this feature.In description of the present utility model, unless otherwise
Illustrating, " multiple " are meant that two or more.
In description of the present utility model, it should be noted that unless otherwise clearly defined and limited,
Term " is installed ", " being connected ", " connection " should be interpreted broadly, and connects for example, it may be fixing,
Can also be to removably connect, or be integrally connected；Can be to be mechanically connected, it is also possible to be electrical connection；
Can be to be joined directly together, it is also possible to be indirectly connected to by intermediary, can be the company of two element internals
Logical.For the ordinary skill in the art, can understand that above-mentioned term is at this by concrete condition
Concrete meaning in utility model.
Describe this utility model below with reference to the accompanying drawings and in conjunction with the embodiments in detail.
A kind of high-low temperature test chamber constant thermal apparatus at low temperature, including compressor, the high temperature that described compressor is discharged
The most condensed device of gases at high pressure, drying device, B electromagnetic valve, reducer and vaporizer return to compressor
Entrance, by being provided with A electromagnetic valve, described examination the entrance of described condenser to the entrance of described vaporizer
Tryoff circulated air exit is provided with temperature sensing device, described temperature sensing device transmission temperature, pressure signal
To control system, when described control system controls the startup of A electromagnetic valve according to the situation of temperature, pressure signal,
B closed electromagnetic valve；When B electromagnetic valve starts, A closed electromagnetic valve.Thermocycling of the present utility model
Case constant thermal apparatus at low temperature is controlled by temperature sensing device and control system, and constant-temperature precision is high；Simultaneously
The input of vaporizer has two-way supply, and a road is through condenser and drying device and rearmounted reducer
Low temperature low pressure gas, a road is the high temperature and high pressure gas discharged by compressor, and control system is according to pressure
When the RST that temperature sensing device gathers controls A, B electromagnetic valve linking, i.e. temperature less than setting value,
Close B electromagnetic valve, start A electromagnetic valve simultaneously, when temperature is higher than setting value, start B electromagnetic valve, with
Time close A electromagnetic valve, remain temperature constant, and avoid evaporimeter frosting, the use of extension device
Life-span and constant-temperature precision.Eliminate the heater assembly above vaporizer, saves energy.
Described drying device is device for drying and filtering.Drying device has filtering function can adsorb steam, mistake
Filter granule foreign etc., further extension device service life.
Described temperature sensing device is temperature sensors of high precision.Sensor is conveniently installed and used, raising group
Dress efficiency.
Described control system uses instrument control Special temp controller module FA211 or FA200 to control.The special control of instrument control
Temperature module FA211 or FA200 automatic control system have that stability is high, security performance is strong, anti-interference
The advantages such as ability is strong, additionally, instrument control Special temp controller module FA211 or FA200 are in parameter setting procedure
Having obtained effective simplification, workability can be high so that the manipulation of operator becomes easy.Meanwhile,
It is convenient that instrument control Special temp controller module FA211 or FA200 control system install relatively other control system, daily
Maintenance the easiest.
Described reducer is capillary tube.Throttle more stable.
Work process: be changed into medium temperature and medium pressure after the condensed device of high temperature and high pressure gas discharged by compressor
Medium temperature and medium pressure gas is become through B electromagnetic valve after liquid or gas liquid mixture drying filter dry filter again
Enter vaporizer with after reducer throttling decrease temperature and pressure, after evaporator refrigeration, return compressor, control
The RST that system gathers according to pressure and temp induction installation controls A, B electromagnetic valve linking, i.e. works as temperature
When degree pressure is less than setting value, closing B electromagnetic valve, start A electromagnetic valve simultaneously, temperature, pressure is higher than setting
During definite value, start B electromagnetic valve, simultaneously close off A electromagnetic valve.
The foregoing is only preferred embodiment of the present utility model, not new in order to limit this practicality
Type, all within spirit of the present utility model and principle, any modification, equivalent substitution and improvement made
Deng, within should be included in protection domain of the present utility model.
Claims (5)
1. a high-low temperature test chamber constant thermal apparatus at low temperature, it is characterised in that: include compressor, described
Compressor discharge the most condensed device of high temperature and high pressure gas, drying device, B electromagnetic valve, reducer and
Vaporizer returns to suction port of compressor, the entrance of described condenser be provided with to the entrance of described vaporizer
A electromagnetic valve, described proof box circulated air exit is provided with temperature sensing device, described temperature sensing device
Transmission temperature signal controls A electromagnetic valve to control system, described control system according to the situation of temperature signal
With B closed electromagnetic valve alternating movement.
High-low temperature test chamber constant thermal apparatus at low temperature the most according to claim 1, it is characterised in that:
Described drying device is device for drying and filtering.
High-low temperature test chamber constant thermal apparatus at low temperature the most according to claim 1, it is characterised in that:
Described temperature sensing device is temperature sensors of high precision.
High-low temperature test chamber constant thermal apparatus at low temperature the most according to claim 2, it is characterised in that:
Described control system uses instrument control Special temp controller module FA211 or FA200 to control.
5., according to the high-low temperature test chamber constant thermal apparatus at low temperature described in any one of claim 1-4, it is special
Levy and be: described reducer is capillary tube.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620266957.5U CN205627990U (en) | 2016-03-30 | 2016-03-30 | High low temperature test box low -temperature constant -temperature device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620266957.5U CN205627990U (en) | 2016-03-30 | 2016-03-30 | High low temperature test box low -temperature constant -temperature device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205627990U true CN205627990U (en) | 2016-10-12 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620266957.5U Active CN205627990U (en) | 2016-03-30 | 2016-03-30 | High low temperature test box low -temperature constant -temperature device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689021A (en) * | 2016-03-30 | 2016-06-22 | 天津亭华科技有限公司 | Low-temperature constant temperature device of high-temperature and low-temperature testing box |
-
2016
- 2016-03-30 CN CN201620266957.5U patent/CN205627990U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105689021A (en) * | 2016-03-30 | 2016-06-22 | 天津亭华科技有限公司 | Low-temperature constant temperature device of high-temperature and low-temperature testing box |
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| GR01 | Patent grant |