CN108170184A - A kind of circulating cooling type thermostatic case for micro pressure measuring - Google Patents
A kind of circulating cooling type thermostatic case for micro pressure measuring Download PDFInfo
- Publication number
- CN108170184A CN108170184A CN201810025122.4A CN201810025122A CN108170184A CN 108170184 A CN108170184 A CN 108170184A CN 201810025122 A CN201810025122 A CN 201810025122A CN 108170184 A CN108170184 A CN 108170184A
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- temperature
- thermostat
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- babinet
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D23/00—Control of temperature
- G05D23/19—Control of temperature characterised by the use of electric means
- G05D23/20—Control of temperature characterised by the use of electric means with sensing elements having variation of electric or magnetic properties with change of temperature
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- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
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Abstract
The present invention relates to a kind of circulating cooling type thermostatic casees for micro pressure measuring, belong to metrological testing technology field.The insulating box is distinguished and conventional temperature insulating box, between the integral structure of traditional insulating box, there are vibration of compressor and noise problem, the requirement of accurate micro pressure measuring can not be met, using outer loop coolant thermostat, 0.01 DEG C of the thermostat temperature control uniformity, 0.01 DEG C/10min of temperature control fluctuation degree, cooling medium is made to enter in insulating box internal double layers heat exchange copper tube coil from groove body by thermostat itself pump housing and thermo-insulating pipe line to recycle, in babinet fan is arranged in the lower left corner and the upper right corner, by this at two fan the air in babinet is made to carry out forced convection cycle, carry out sufficient heat exchange, the gas temperature reached in babinet is uniform, it can carry out after temperature fluctuation is met the requirements for the pressure measurement and calibration under specific temperature conditions.
Description
Technical field
The present invention relates to a kind of circulating cooling type thermostatic casees for micro pressure measuring, belong to metrological testing technology neck
Domain.
Background technology
Requirement of the micro pressure measuring calibration field to temperature parameter is very high, generally requires temperature range (15~30) DEG C, temperature
0.1 DEG C of uniformity, 0.1 DEG C of temperature fluctuation/for 24 hours, in addition it is also contemplated that the influence of vibration equipment, noise to pressure measurement, most
Vibration and noise may be reduced.Traditional temperature test chamber cannot meet in terms of above-mentioned two, first temperature parameter index
Above-mentioned requirements are not achieved, secondly conventional temperature chamber is all integral structure, cooling compressor gesture on the downside of babinet
The vibration and influence of noise to babinet must be brought.
Micro pressure measuring is carried out in isothermal experiments room at present, using central air-conditioning or individual air-conditioning into trip temperature
Control, temperature condition is generally in (20 ± 1) DEG C, i.e. fluctuations in indoor temperature ± 1 DEG C；And its temperature of common temperature test chamber on the market
Spend uniformity and temperature fluctuation also mostly in (1~2) DEG C, above-mentioned environmental condition micro pressure measuring or calibration tape are come it is larger not
Certainty.
Invention content
The purpose of the present invention is to solve existing temperature test chamber can not meet demand the problem of, provide a kind of for micro-
Press the circulating cooling type thermostatic case measured.
The purpose of the present invention is what is be achieved through the following technical solutions：
A kind of circulating cooling type thermostatic case for micro pressure measuring is made of constant temperature box body and circulation thermostat：
Constant temperature box body is connect with circulation thermostat by thermo-insulating pipe line, by the way that thermostat lower water temperature, heat exchange is carried out with babinet,
Realize that constant temperature is uniform in babinet；
The constant temperature box body includes：Internal box, outer case, copper tube coil, insulating layer, fan；
The internal box is placed in inside outer case, and is kept at a distance with outer case；It is installed on internal box madial wall
Copper tube coil；Insulating layer is installed on internal box lateral wall；Fan is fixedly mounted in internal box；At the top of internal box, outer case
Be provided with door on side wall, and position corresponds to；The door at top is used to place related sensor of minute-pressure test etc.；The Men Bu of side wall
Glass window is put, it is whether correct for observing the test equipment placement position of box house.
The fan is fixedly mounted on the diagonal angle of internal box, forms circulated air, it is ensured that the temperature of babinet is realized uniform；It is logical
Adjusting to fan wind speed size can be realized by crossing the rotation button being fixed at the top of internal box；
The copper tube coil material be TU2 oxygen-free coppers, coil pipe outer diameter 10mm, internal diameter 8mm；Coil pipe spacing be 50mm, stringing
Form uses horizontal " U-shaped " tubular structure, is distributed in the side and bottom surface of thermostatic box.
The circulation thermostat by refrigeration compressor, heater, blender, magnetic water pump, thermal insulation material, liquid medium,
The compositions such as groove body, temperature-control senser and temperature controller.Circulation constant temperature trench bottom places refrigeration compressor, and top is connected to by pipeline
Thermostat groove body, be liquid medium, temperature-control senser and blender inside groove body, outside is thermal insulation material, and heater passes through
External thermal insulation material is fixed on inside groove body, and magnetic water pump is connect with liquid medium, is fixed on the side wall of thermostat groove body；
Temperature-control senser is connect with temperature controller on panel.
The course of work：The temperature that outer loop thermostat is carried out according to the temperature requirement of thermostatic case is set, and opens system
Cold and stirring motor makes temperature uniformity in groove body reach 0.01 DEG C, treat temperature stablize (i.e. temperature fluctuation satisfaction 0.01 DEG C/
Start magnetic water pump after 10min), set flow velocity, cooling medium is made to enter thermostatic along soak cycles pipeline out of groove body
In the heat exchange coil of case, from the outlet return of insulating box coil pipe to thermostat circulation line entrance, so recycle repeatedly, and pass through
The adjusting of wind speed in babinet, it is final to realize thermostatic the temperature inside the box constant homogeneous.
Outer circulation type thermostat is mainly situated between by refrigeration compressor, heater, blender, magnetic water pump, thermal insulation material, liquid
Matter and temperature control equipment composition；There is refrigeration, heating, liquid agitation and external liquid circulation；The temperature control of groove body itself
System can reach 0.01 DEG C of temperature uniformity, and 0.01 DEG C/10min of temperature fluctuation requires that wine can be selected according to set temperature
Essence or distilled water are as liquid circulation medium.
Thermostatic case in left side, right side, three face of the back side using double-deck horizontal U-typed coil pipe, material selection red copper,
There is thermal insulation material package outside coil pipe；Babinet top and bottom preferable heat insulation effect is realized using polyurethane foam；Front is equipped with and opens
Door, devises two-door, and each door front had both been reached preferably heat preservation or can have been realized to babinet using vacuum double heat insulation glass
Object is observed；Small fan is installed in the lower left corner of babinet with upper angle again, has wind speed adjusting knob outside babinet, according to inside
Temperature uniformity requirement carrys out wind speed setting size；It is influenced to reduce babinet by external world's touching, employs and match in the bottom of box
Weight iron block pedestal, it is ensured that it, which is placed, stablizes.
Piping material itself thermal conductivity factor that outer loop pipeline is selected is smaller while is furnished with the smaller guarantor of thermal conductivity factor again
Adiabator wraps up, and integral heat insulation effect is good, reduces liquid temperature loss on the way, circulation line length about 1.5m, pipe as far as possible
The front and back end on road is furnished with valve, and valve is closed when equipment does not start, and reduces the liquid flowing of groove body.
Advantageous effect
It is of the present invention it is a kind of be simple and convenient to operate for the circulating cooling type thermostatic box structure of micro pressure measuring,
Temperature range, uniformity and the fluctuation degree of box house are met the requirements, and vibration and noise are small, are highly suitable for minute-pressure calibration or are surveyed
Amount.
1st, minimum temperature uniformity and the superior performance parameters of temperature fluctuation are realized.In order to reach the temperature of box house
Index request is spent, its temperature uniformity of the circulation thermostat of use is with fluctuation degree index better than index request in constant temperature box body
10 times, by the way of outer loop cooling, refrigerant is introduced into the copper tube coil of constant temperature box body by circulation line
Interior carry out heat exchange, this kind of mode can reach the technical parameter requirement of babinet substantially.
2nd, minimum noise and vibration.Babinet is isolated with thermostat by way of outer loop, reduce vibration and
The influence of noise meets the needs of minute-pressure calibration.In addition counterweight iron block pedestal is employed in the bottom of constant temperature box body, it is ensured that its
It places and stablizes, also reduce the influence that ambient vibration is calibrated minute-pressure or measured.
3rd, the installation operation convenient for test sensor and observation.The design of head cover facilitates micro pressure measuring sensor and correlation
The installation of instrument, by the glass window of front thermal insulating door thermally insulated door, it can be achieved that accurate observation to instrument installation situation, convenient for adjusting in time
Whole instrumented site and posture.
Description of the drawings
Fig. 1 is thermostatic case and circulation thermostat structure diagram of the present invention；
Fig. 2 is outer loop piping diagram of the present invention.
Wherein, 1- internal box；2- outer cases；3- head covers；4- insulating layers；5- wind speed adjusting knobs；6- power switches；7- is protected
Warm external door；8- keeps the temperature inside door；9- fans；10- copper tube coils；11- pedestals；12- circulation thermostats；13- inlet pipelines；14- is returned
Water lines.
Specific embodiment
The present invention is done with embodiment below in conjunction with the accompanying drawings described in detail below.
Embodiment 1
For generating 20 DEG C of temperature.
A kind of circulating cooling type thermostatic case for micro pressure measuring, as shown in Figure 1, permanent by constant temperature box body and cycle
Warm slot 12 forms：Constant temperature box body is connect with circulation thermostat by inlet pipeline 13 and water return pipeline 14, by thermostat
Lower water temperature carries out heat exchange with babinet, realizes that constant temperature is uniform in babinet, as shown in Figure 2；
The constant temperature box body includes：Internal box 1, outer case 2, copper tube coil 10, insulating layer 4 and fan 9；
The internal box 1 is placed in inside outer case 2, and bottom is fixedly mounted on 2 bottom of outer case, other parts and outer case
2 keep at a distance, and outer case 2 is fixed on the pedestal 11；Copper tube coil 10 is installed on 1 madial wall of internal box；Outside internal box 1
Insulating layer 4 is installed on side wall；Fan 9 is fixedly mounted in internal box 1；It is opened on internal box 1,2 top of outer case and side wall
There is door, and position corresponds to；The door of the top of the box is head cover 3；Head cover 3 is used to place the related sensor of minute-pressure test
Deng；The door of the side wall is heat preservation external door 7 and heat preservation inside door 8；Glass window is arranged on heat preservation external door 7 and heat preservation inside door 8, is used
It is whether correct in the test equipment placement position of observation box house；The positive top right side of outer case 2 is mounted with that fan power supply is opened
Close 6.
The fan is fixedly mounted on the diagonal angle of internal box 1, forms circulated air, it is ensured that the temperature of babinet is realized uniform；
The adjusting to fan wind speed size can be realized by the wind speed adjusting knob 5 for being fixed on 1 top of internal box；
The copper tube coil material be TU2 oxygen-free coppers, coil pipe outer diameter 10mm, internal diameter 8mm；Coil pipe spacing be 50mm, stringing
Form uses horizontal " U-shaped " tubular structure, is distributed in the side and bottom surface of thermostatic box；
Circulation thermostat：By refrigeration compressor, heater, blender, magnetic water pump, thermal insulation material, liquid medium, groove body
With the compositions such as temperature-control senser and temperature controller；Circulation constant temperature trench bottom places refrigeration compressor, and top is connected to by pipeline
Thermostat groove body is liquid medium, temperature-control senser and blender inside groove body, and outside is thermal insulation material, and heater passes through outer
The thermal insulation material in portion is fixed on inside groove body, and magnetic water pump is connect with liquid medium, is fixed on the side wall of thermostat groove body；Control
Temperature sensor is connect with temperature controller on panel；
It is 20 DEG C that temperature cycles thermostat is set its temperature controller temperature, starts the refrigeration and agitating function of groove body,
Make its internal temperature quick and uniformly reach 20 DEG C, start water pump button after equalized temperature, and open outer loop pipeline
Valve, it is ensured that cycle is unobstructed, and coil pipe of the loop start liquid medium out of babinet is cooled down and that cycle is returned to after being balanced is permanent
In warm slot, complete a cycle, so repeatedly, until internal temperature is fully achieved 20 DEG C, due to length of pipe have it is warm on the way
Degree loss, it is sometimes desirable to which circulation thermostat temperature setting is relatively low.
Actual test shows that circulation thermostat realizes that temperature uniformity reaches 0.007 after temperature setting completes 1 hour
DEG C, temperature fluctuation reaches 0.004 DEG C/10min, and start liquid medium circulation surveyed insulating box inner body after 2 hours for 24 hours
Examination, temperature uniformity reach 0.07 DEG C, 0.08 DEG C of temperature fluctuation/for 24 hours, better than 0.1 DEG C of temperature uniformity of design and 0.1 DEG C/
Temperature fluctuation index for 24 hours.
Above-described specific descriptions have carried out further specifically the purpose, technical solution and advantageous effect of invention
It is bright, it should be understood that the above is only a specific embodiment of the present invention, the protection model being not intended to limit the present invention
It encloses, all within the spirits and principles of the present invention, any modification, equivalent substitution, improvement and etc. done should be included in the present invention
Protection domain within.
Claims (5)
1. a kind of circulating cooling type thermostatic case for micro pressure measuring, it is characterised in that：It is permanent by constant temperature box body and cycle
Warm slot composition：Constant temperature box body is connect with circulation thermostat by thermo-insulating pipe line, by thermostat lower water temperature, with babinet into
Row heat exchange realizes that constant temperature is uniform in babinet；
The constant temperature box body includes：Internal box, outer case, copper tube coil, insulating layer and fan；
The internal box is placed in inside outer case, and bottom is fixedly mounted on outer case bottom, other parts and outer case keep away from
From；Copper tube coil is installed on internal box madial wall；Insulating layer is installed on internal box lateral wall；Fan is fixedly mounted on
In internal box；Door is provided at the top of internal box, outer case and on side wall, and position corresponds to；The door at top is surveyed for placing minute-pressure
The sensor of examination；The door arrangement glass window of side wall, it is whether correct for observing the test equipment placement position of box house.
2. a kind of circulating cooling type thermostatic case for micro pressure measuring as described in claim 1, it is characterised in that：It is described
Fan is fixedly mounted on the diagonal angle of internal box, forms circulated air, it is ensured that the temperature of babinet is realized uniform；By being fixed on interior case
Rotation button at the top of body can realize the adjusting to fan wind speed size.
3. a kind of circulating cooling type thermostatic case for micro pressure measuring as described in claim 1, it is characterised in that：It is described
Copper tube coil material be TU2 oxygen-free coppers, coil pipe outer diameter 10mm, internal diameter 8mm；Coil pipe spacing is 50mm, and cloth form of tubes is using horizontal
" U-shaped " tubular structure is distributed in the side and bottom surface of thermostatic box.
4. a kind of circulating cooling type thermostatic case for micro pressure measuring as described in claim 1, it is characterised in that：It is described
Circulation thermostat is passed by refrigeration compressor, heater, blender, magnetic water pump, thermal insulation material, liquid medium, groove body and temperature control
The compositions such as sensor and temperature controller；Circulation constant temperature trench bottom places refrigeration compressor, and the thermostat slot on top is connected to by pipeline
Body is liquid medium, temperature-control senser and blender inside groove body, and outside is thermal insulation material, and heater passes through external heat preservation
Material is fixed on inside groove body, and magnetic water pump is connect with liquid medium, is fixed on the side wall of thermostat groove body；Temperature-control senser
It is connect with temperature controller on panel.
5. a kind of circulating cooling type thermostatic case for micro pressure measuring as described in an any of the above-described claim, special
Sign is：The course of work of the insulating box is：The temperature of outer loop thermostat is carried out according to the temperature requirement of thermostatic case
Degree setting, opening refrigeration and stirring motor makes slot body temperature uniformly reach 0.01 DEG C, starts magnetic water pump after temperature stabilization,
Flow velocity is set, cooling medium is made to be entered in the heat exchange coil of thermostatic case along soak cycles pipeline out of groove body, from constant temperature
The outlet return of case coil pipe so recycles repeatedly, and pass through the adjusting of wind speed in babinet, finally to thermostat circulation line entrance
Realize thermostatic the temperature inside the box constant homogeneous.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810025122.4A CN108170184A (en) | 2018-01-11 | 2018-01-11 | A kind of circulating cooling type thermostatic case for micro pressure measuring |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810025122.4A CN108170184A (en) | 2018-01-11 | 2018-01-11 | A kind of circulating cooling type thermostatic case for micro pressure measuring |
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| Publication Number | Publication Date |
|---|---|
| CN108170184A true CN108170184A (en) | 2018-06-15 |
Family
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810025122.4A Pending CN108170184A (en) | 2018-01-11 | 2018-01-11 | A kind of circulating cooling type thermostatic case for micro pressure measuring |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111337719A (en) * | 2020-03-06 | 2020-06-26 | 国网江苏省电力有限公司营销服务中心 | Electric energy meter |
| CN112179527A (en) * | 2019-07-04 | 2021-01-05 | 中国建筑材料科学研究总院有限公司 | Isothermal calorimetry apparatus |
| CN112362235A (en) * | 2020-12-04 | 2021-02-12 | 中国航空工业集团公司北京长城计量测试技术研究所 | Light path adjustable components of a whole that can function independently adds hot type gas pressure calibrating device |
| CN113157016A (en) * | 2021-03-23 | 2021-07-23 | 北京无线电计量测试研究所 | Incubator for atomic clock and use method |
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| GB1025727A (en) * | 1963-10-31 | 1966-04-14 | Ranco Inc | Ice bank control circuits |
| CN202230395U (en) * | 2011-07-24 | 2012-05-23 | 天津渤海晟机械设备配件有限公司 | Insulation box for instrument |
| CN103977850A (en) * | 2014-06-11 | 2014-08-13 | 国家海洋标准计量中心 | High-accuracy constant-temperature tank system with temperature change of seawater |
| CN106768486A (en) * | 2016-12-27 | 2017-05-31 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of thermostat |
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2018
- 2018-01-11 CN CN201810025122.4A patent/CN108170184A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1025727A (en) * | 1963-10-31 | 1966-04-14 | Ranco Inc | Ice bank control circuits |
| CN202230395U (en) * | 2011-07-24 | 2012-05-23 | 天津渤海晟机械设备配件有限公司 | Insulation box for instrument |
| CN103977850A (en) * | 2014-06-11 | 2014-08-13 | 国家海洋标准计量中心 | High-accuracy constant-temperature tank system with temperature change of seawater |
| CN106768486A (en) * | 2016-12-27 | 2017-05-31 | 中国航空工业集团公司北京长城计量测试技术研究所 | A kind of thermostat |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112179527A (en) * | 2019-07-04 | 2021-01-05 | 中国建筑材料科学研究总院有限公司 | Isothermal calorimetry apparatus |
| CN111337719A (en) * | 2020-03-06 | 2020-06-26 | 国网江苏省电力有限公司营销服务中心 | Electric energy meter |
| CN112362235A (en) * | 2020-12-04 | 2021-02-12 | 中国航空工业集团公司北京长城计量测试技术研究所 | Light path adjustable components of a whole that can function independently adds hot type gas pressure calibrating device |
| CN112362235B (en) * | 2020-12-04 | 2022-03-25 | 中国航空工业集团公司北京长城计量测试技术研究所 | Light path adjustable components of a whole that can function independently adds hot type gas pressure calibrating device |
| CN113157016A (en) * | 2021-03-23 | 2021-07-23 | 北京无线电计量测试研究所 | Incubator for atomic clock and use method |
| CN113157016B (en) * | 2021-03-23 | 2022-08-23 | 北京无线电计量测试研究所 | Incubator for atomic clock and use method |
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Application publication date: 20180615 |