CN104132755B - A kind of temperature testing device that liquid constant temperature can be converted to air constant temperature - Google Patents
A kind of temperature testing device that liquid constant temperature can be converted to air constant temperature Download PDFInfo
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- CN104132755B CN104132755B CN201410380145.9A CN201410380145A CN104132755B CN 104132755 B CN104132755 B CN 104132755B CN 201410380145 A CN201410380145 A CN 201410380145A CN 104132755 B CN104132755 B CN 104132755B
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- temperature
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- 239000007788 liquid Substances 0.000 title claims abstract description 157
- 239000002184 metal Substances 0.000 claims abstract description 45
- 229910052751 metal Inorganic materials 0.000 claims abstract description 45
- 239000012530 fluid Substances 0.000 claims description 17
- 239000000565 sealant Substances 0.000 claims description 17
- 229920000742 Cotton Polymers 0.000 claims description 8
- 238000004321 preservation Methods 0.000 claims description 8
- 230000005540 biological transmission Effects 0.000 claims description 2
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 claims 1
- 239000010931 gold Substances 0.000 claims 1
- 229910052737 gold Inorganic materials 0.000 claims 1
- 238000010438 heat treatment Methods 0.000 abstract description 20
- 239000007789 gas Substances 0.000 description 10
- 238000004134 energy conservation Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 238000011068 load Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 238000009413 insulation Methods 0.000 description 3
- 238000005259 measurement Methods 0.000 description 3
- 230000036760 body temperature Effects 0.000 description 2
- UGFAIRIUMAVXCW-UHFFFAOYSA-N carbon monoxide Chemical compound [O+]#[C-] UGFAIRIUMAVXCW-UHFFFAOYSA-N 0.000 description 2
- 229910002091 carbon monoxide Inorganic materials 0.000 description 2
- 238000001816 cooling Methods 0.000 description 2
- 239000003292 glue Substances 0.000 description 2
- 238000010992 reflux Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000011105 stabilization Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 206010037660 Pyrexia Diseases 0.000 description 1
- 230000000903 blocking Effects 0.000 description 1
- CURLTUGMZLYLDI-UHFFFAOYSA-N carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000009833 condensation Methods 0.000 description 1
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- 238000010586 diagram Methods 0.000 description 1
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- 239000000411 inducer Substances 0.000 description 1
- 239000007791 liquid phase Substances 0.000 description 1
- 150000002739 metals Chemical class 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
Abstract
A kind of temperature testing device that liquid constant temperature can be converted to air constant temperature, it includes liquid thermostatic bath, liquid thermostatic bath agitator and metallic heat exchanger tube, one end of described metallic heat exchanger tube connects with the bottom in metallic test chamber, and the top of liquid thermostatic bath connects liquid constant temperature groove upper cap；One is built-in with the can of blower fan is fixedly connected on the sidepiece of liquid constant temperature groove upper cap by lower fixing bolt and upper fixing bolt, the air outlet of blower fan is connected with the other end of metallic heat exchanger tube by the first heat exchange connecting pipe, and the air intake vent of blower fan is connected with the metal housing being positioned at top, metallic test chamber by the second heat exchange connecting pipe.Operating temperature range of the present invention can reach 100 DEG C～300 DEG C, and improves stability and the uniformity of air themperature.It solves the same liquid used in liquid thermostatic bath to air heating and constant temperature simultaneously, but uses compressed air to flow and problem that the method that empties is brought.
Description
Technical field
The present invention relates to a kind of thermometer (temperature sensor) examine and determine or calibration thermostatic equipment, particularly relating to one can be by
Liquid constant temperature is converted to the temperature testing device of air constant temperature.
Background technology
In the calibrating of current contact type temperature measuring instrument or calibration process, it is common that by tested thermometer (temperature sensor)
Being placed on together with normal thermometer in a temperature stabilization and uniform constant temperature source, tested thermometer and normal thermometer are simultaneously
Measuring the temperature of constant temperature source, relatively tested thermometer and the measurement result of normal thermometer, just obtained the survey of tested thermometer
Amount error.So, the stability of constant temperature source and uniformity, the result of calibrating or calibration will be produced and affect, thus constant temperature
The stability in source and uniformity are the best, and the impact on calibrating or calibration result will be the least.For calibrating or the constant temperature source of calibration,
The feature of its technical specification is exactly the stability, uniformity in constant temperature source temperature field and the temperature range that can reach.
Owing to measuring the multiformity of object, there is the measuring instrument of a large portion, the temperature of air can only be measured, it is impossible to survey
The temperature of quantity of fluid.Also have because temperature sensor combines with other sensor, cause it can only measure air, than
The measuring multiple parameters sensor combined with gas sensors such as carbon monoxide, carbon dioxide, humidity such as temperature sensor,
Owing to the measurement object of the gas sensors such as carbon monoxide can only be air, cause also to measure air during temperature survey.When
When this class sensor carries out temperature correction, it is necessary to be placed in a constant temperature source with air as medium, it is impossible to be placed on
In constant temperature source with liquid as medium, otherwise will be damaged.
Disclosure satisfy that thermometer is examined and determine or the constant temperature source of alignment requirements at present, mainly the temperature chamber with liquid as medium, i.e. one
As daily described thermostatic oil bath and thermostatic water bath etc..Air constant temperature source with air incubator as representative, the stability of its temperature
More than several order of magnitude is differed compared with the temperature chamber with liquid as medium with uniformity.Trace it to its cause, mainly due to air
Character and mode of heating cause.Poor thermal conductivity and thermal capacity little be the inherent character of air.At present, general air is permanent
The stability of incubator and uniformity are in-70 DEG C～300 DEG C of temperature ranges, and it can only achieve ± 0.5 DEG C and 4 DEG C respectively.State
Outer a kind of fine air constant temperature bath cabinet designed exclusively for air type resistor, the measurement of inducer, uses fluorescent tube to air
Heating and constant temperature, owing to fluorescent tube increases the contact area with air, thus the stability of the air themperature obtained and uniformity
Have been improved, reached ± 0.06 DEG C and 0.4 DEG C, but temperature range cover only 5 DEG C～50 DEG C.And best liquid constant
Stability and the uniformity of temperature groove have respectively reached ± 0.0008 DEG C and 0.002 DEG C.That commonly use, common liquid thermostatic bath,
Within the temperature range of-100 DEG C～300 DEG C, stability and uniformity are typically attained by ± 0.02 DEG C and 0.05 DEG C.
Air incubator and the design structure of external fine air constant temperature bath cabinet at present, as it is shown on figure 3, air incubator case
Setting heat-insulation layer 2 in body 1, it is arranged by air-duct clapboard 6 and air incubator casing 1 sidewall at the rear portion of a work space
The air channel 8 constituted, installs heating element heater 7, refrigerator 9 in air channel 8.Air is heated element 7, refrigeration in air channel 8
The directly heating and cooling down of device 9, the blower fan 5 that top, air channel 8 is installed is forced air under the drive of fan driving motor 4
Circulation, is entered work space by wind direction adjusting plate 3, and air forms circulation in being back to air channel 8 again bottom work space.
The major defect of this method for designing can be summarized as:
(1) heating surface (area) (HS of heating element heater 7 is less, and air is insufficient with the heat exchange of heating surface, flows in air channel 8
Air, have considerable part directly not contact with the heating surface of heating element heater 7, this has resulted in partial air by directly
Heating, has partial air not to be themselves directly heated；Being similar to therewith, the refrigeration area of refrigerator 9 is the least, can cause identical
Problem；
(2) control to heating element heater 7, is that the energising of a kind of discontinuous controls, i.e. heating element heater is not that a temperature is steady
Fixed thermal source, is heated when this has resulted in air, time and not heated.
Due to the inherent character of air conduction difference, which results in stability and the uniformity of air themperature, it is impossible to reach relatively
High level.
Contrary with the character of air, heat conductivity is good and thermal capacity is greatly the inherent character of liquid.Use heating element heater, refrigerator
Directly to liquid heating and cooling, liquid is made to flow in test chamber by stirring, the liquid thermostatic bath temperature so obtained
Stability and uniformity can exceed the several order of magnitude of air incubator.
In order to solve the problem of air conduction difference, people devise a kind of air temperature chamber, its structure as shown in Figure 4, it
Including oil-free air compressor 10, air drier 11, metal-air dielectric tests chamber 12, normal thermometer 13, tested
Thermometer 14, test chamber air drain hole 15, agitator 16, Liquid Medium Constant Temperature Oven 17, metallic heat exchanger tube 18 and
Micropore closure air homogenizer 19, it is immersed in a metal-air dielectric tests chamber 12 in Liquid Medium Constant Temperature Oven 17,
Meanwhile, heat conductivity is good, sufficiently long metallic heat exchanger tube 18 is also submerged in Liquid Medium Constant Temperature Oven 17, and metal fever is handed over
The bottom of one end and test chamber of changing pipe 18 is connected, and the other end is passed through compressed air.Compressed air is at metallic heat exchanger tube 18
Interior flowing, though the poor thermal conductivity of air, owing to having carried out the heat exchange of long period with liquid, compressed air arrives to be surveyed
During examination chamber, air themperature also is able to fairly close temperature of liquid.So, just obtain in test chamber suitable with temperature of liquid
Close air themperature, stability is the most fairly close.This is a kind of method of design air temperature chamber, schematic diagram below figure 4.
Although this method obtains the air themperature of fine stability, but there is many shortcomings, major defect can be concluded
For:
(1) wanting optional equipment oil-free air compressor 10 and air drier 11, compressor air humidity out is very big,
Nearly reach saturation, needed to use air drier 11 that air is carried out dehumidification treatments, condensation during to prevent low temperature
Blocking heat-exchange tube；
(2) design of air emptying, determines the air needing larger flow, and compressed-air actuated flow velocity is very fast, so needing
Metallic heat exchanger tube 18 that will be the longest, air could obtain sufficient heat exchange with liquid, in order to obtains and temperature of liquid phase
When close air themperature；
(3) owing to needing the air of larger flow and longer metallic heat exchanger tube 18, the compressed air of room temperature can be taken away greatly
The heat of amount, this is for liquid thermostatic bath, is a load the biggest；
(4) compressed air of room temperature differs the biggest with temperature of liquid, and the heat that air is taken away is the most, liquid thermostatic bath steady
Qualitative and uniformity will become the poorest, and this is the greatest drawback of this design；
(5) general air drier 11, (air starts temperature when condensing dew point also can only to be dried to dew point-70 DEG C
Temperature), which has limited the temperature range of device work.
(6) air and metallic heat exchanger tube 18 load the impact on liquid thermostatic bath, and the most guaranteed liquid thermostatic bath is original
During the technical performance of temperature of liquid field, the technical performance of guarantee air themperature field and the technical performance phase of temperature of liquid field
When；
(7) for these reasons, current this design can only achieve-70 DEG C～the temperature range of 180 DEG C；
(8) be gradually increased along with the temperature difference of initial air themperature with temperature of liquid, for liquid thermostatic bath, load also by
Cumulative greatly, at this moment the original technical performance of liquid thermostatic bath is gradually deteriorated, and the technical performance of air themperature field is also with gradually becoming
Difference, it is impossible to obtain the identical technical performance of technical performance original with liquid thermostatic bath and (include temperature stability and uniformity, temperature
Degree scope etc.)；
(9) design of air emptying, wastes the energy, does not meets energy-conservation requirement.
Summary of the invention
It is an object of the invention to provide a kind of temperature testing device that liquid constant temperature can be converted to air constant temperature, stablizing of it
Property and uniformity be significantly improved, widened temperature range simultaneously, meet air type thermometer calibrating or calibration to air
The demand of temperature chamber.
The invention is for the deficiency of existing air temperature chamber, the i.e. technical performance of air temperature chamber, it is impossible to reach liquid constant
The technical merit of temperature groove, or stability and uniformity technical performance, when can reach the level of liquid thermostatic bath, temperature range
The problems such as the temperature range that can not reach liquid thermostatic bath, redesign, make technical performance and the liquid of air temperature chamber
Temperature chamber technical performance is identical.The present invention solves the problem existing for current air temperature chamber.A kind of air obtained by thus
Temperature chamber, compares current air temperature chamber, and stability and uniformity are significantly improved, and have widened temperature range simultaneously,
Solve the calibrating of air type thermometer or the calibration demand to air temperature chamber.
The present invention is achieved like this, and it includes liquid thermostatic bath and is positioned at the liquid thermostatic bath stirring of liquid thermostatic bath
Device, described liquid thermostatic bath agitator is connected with the second driving motor-driven being positioned at outside liquid thermostatic bath, described liquid constant temperature
It is provided with metallic test chamber in groove and is looped around the metallic heat exchanger tube of periphery, metallic test chamber, the one of described metallic heat exchanger tube
End connects with the bottom in metallic test chamber, and it is structurally characterized in that, described liquid thermostatic bath inwall is provided with heat-preservation cotton layer, liquid constant
The sidewall of temperature groove is additionally provided with spout hole, and the top of liquid thermostatic bath connects liquid constant temperature groove upper cap；
One can being built-in with blower fan is fixedly connected on liquid constant temperature groove upper cap by lower fixing bolt and upper fixing bolt
Sidepiece, the air outlet of blower fan is connected with the other end of metallic heat exchanger tube by the first heat exchange connecting pipe, the air intake vent of blower fan
Connected with the metal housing being positioned at top, metallic test chamber by the second heat exchange connecting pipe.
It is provided with rubber cushion between described can and liquid thermostatic bath contact surface, is positioned at blower fan and first heat exchange of can
The periphery of the part of connecting tube and the second heat exchange connecting pipe is heat-preservation cotton layer.These heat-preservation cotton layers ensure that liquid thermostatic bath
The temperature constant of circulated gases in middle liquid and can.
One end that described first heat exchange connecting pipe is connected with metallic heat exchanger tube is the first connecting tube union joint, and described first even
Adapter union joint is the tubular structure with external screw thread and blunt end, and described first connecting tube union joint passes through the first clamp nut
It is fastenedly connected with metallic heat exchanger tube；
One end that described second heat exchange connecting pipe connects with metal housing is the second connecting tube union joint, described second connecting tube
Union joint is the tubular structure with external screw thread and blunt end, and described second connecting tube union joint passes through the first clamp nut second
The tubular structure that clamp nut highlights with metal housing sidewall is fastenedly connected.Connect on described metal housing and have several metals
Plate, one end of metallic plate is welded on the outer wall of metal housing, the other end by fixing bolt be welded in liquid thermostatic bath
Fixing corner bracket on wall is fixing to be connected.Metallic plate is as support, it is ensured that the structural stability of metal housing.
Described metallic heat exchanger tube and the first connecting tube union joint junction are horn-like structure；With second on described metal housing
The tubular structure that connecting tube union joint is connected also has horn-like structure.In use, the round end of union joint is stuck in loudspeaker
In shape structure, then it is fastened and fixed by the female thread of the external screw thread of union joint with fixing bolt, the convenient dismounting of this structure,
Air-tightness is also very good.
Described liquid constant temperature groove upper cap fixes padlock by be positioned at both sides first and the second clip lock is fixedly connected on liquid
The top of temperature chamber, liquid constant temperature groove upper cap is connected by sealant sealing with liquid thermostatic bath contact surface.This structure makes
Liquid constant temperature groove upper cap and liquid thermostatic bath removably connect, and use clip lock fixing, and seal during use
Glue also ensure that the gas of metallic test intracavity does not leaks.
The middle part of described liquid constant temperature groove upper cap connects to be had for fixed standard thermometer and the rubber stopper of tested thermometer, described
The contact surface of liquid constant temperature groove upper cap and normal thermometer is provided with fluid sealant, liquid constant temperature groove upper cap and the contact of tested thermometer
Face also is provided with fluid sealant, and the upper surface of described rubber stopper is higher than the upper surface of liquid constant temperature groove upper cap, rubber stopper and liquid constant temperature
The contact surface of groove upper cap is provided with fluid sealant.Here rubber stopper is dismountable, it take out after be conveniently replaceable normal thermometer and
Tested thermometer.
The top in described metallic test chamber is connected on the lower surface of rubber stopper, the part that metallic test chamber is closed by metal housing
Being provided with the aperture for aerofluxus, the bottom in metallic test chamber is funnel-shaped structure, in the funnel-shaped structure bottom metallic test chamber
For having the metal charge of microcellular structure.
The top of described metal housing is connected on the lower surface of rubber stopper, and metal housing outer wall connects with liquid constant temperature groove upper cap
Contacting surface is provided with fluid sealant；Which ensure that the gas of metallic test intracavity does not leaks.Above-mentioned rubber stopper, rubber cushion and fluid sealant are intended to
It is resistant to corresponding working temperature.
The invention have the benefit that the technical performance of air temperature chamber obtained by the present invention, with the technology of liquid thermostatic bath
Performance is identical.That is, if the temperature range of the liquid thermostatic bath used can reach-100 DEG C～300 DEG C, then by we
Method and device, also can be converted to temperature range and can reach the air temperature chamber of-100 DEG C～300 DEG C.Meanwhile, the sky obtained
The stability of temperature and uniformity, it is also possible to reach the level identical with primary liquid temperature chamber.Solve and use liquid equally
Liquid in temperature chamber is to air heating and constant temperature, but uses the problem that compressed air flows and the method that empties is brought.
Accompanying drawing explanation
Fig. 1 is the structural front view of the present invention.
Fig. 2 is the structure top view after the present invention removes liquid constant temperature groove upper cap.
The current air incubator of Fig. 3 and the commonly used design structural representation of external fine air constant temperature bath cabinet.
The structural representation of Fig. 4 current air temperature chamber.
In the drawings, 1, air incubator casing 2, heat-insulation layer 3, wind direction adjusting plate 4, fan driving motor 5, blower fan
6, air-duct clapboard 7, heating element heater 8, air channel 9, refrigerator；
10, oil-free air compressor 11, air drier 12, metal-air dielectric tests chamber 13, normal thermometer 14,
Tested thermometer 15, test chamber air drain hole 16, agitator 17, Liquid Medium Constant Temperature Oven 18, metallic heat exchanger tube
19, micropore closure air homogenizer.
Detailed description of the invention
Below in conjunction with the accompanying drawings the detailed description of the invention of the present invention is described further.
The present invention solves current air incubator and uses heating element heater directly to heat air, it is impossible to obtain good stability
And homogeneity question, or at present air temperature chamber needs the emptying of air compressor, air drier, air the most energy-conservation etc. to ask
Topic.The present invention adopts the technical scheme that: use the liquid of temperature stabilization in liquid thermostatic bath 101 to heat air and constant temperature,
Solve heating element heater and directly air heating can not be obtained more preferable temperature stability issues；The method using air circulation,
Solve to need air compressor, air drier, air to empty the most energy-conservation, technical performance and the temperature of liquid of air themperature
The problems such as technical performance is inconsistent；The present invention designs a circulating device, liquid thermostatic bath be converted to air temperature chamber.
The design structural principle of the present invention is, it is immersed in a metallic test chamber 135 in liquid thermostatic bath 101, meanwhile,
Good for one heat conductivity, long enough, the metallic heat exchanger tube 134 that is coiled into round are also submerged in liquid thermostatic bath 101, heat
One end of exchange pipe 134 is connected with the bottom of test chamber, and the other end passes through the first heat exchange connecting pipe 109 and a blower fan
The gas outlet of 107 connects.Second heat exchange connecting pipe (110) then connects test chamber top and the air intake of blower fan 107.
Blower fan 107 drives air to flow in heat-exchange tube and test chamber, thus obtains a kind of with air for being situated between at metallic test intracavity
The temperature source of matter, is i.e. converted to air temperature chamber by liquid thermostatic bath；Wherein, as long as the blast of described blower fan 107 can reach
To the pressure driven needed for air circulation；As long as the temperature of blower fan 107 tolerance can reach by Covering Liguid temperature chamber
Temperature.
As depicted in figs. 1 and 2, it includes liquid thermostatic bath 101 and is positioned at liquid thermostatic bath the concrete structure of the present invention
Liquid thermostatic bath agitator 133 in 101, described liquid thermostatic bath agitator 133 be positioned at outside liquid thermostatic bath 101
Second drives motor 125 to be in transmission connection, and is provided with metallic test chamber 135 and is looped around metal in described liquid thermostatic bath 101
The metallic heat exchanger tube 134 of test chamber 135 periphery, one end of described metallic heat exchanger tube 134 and metallic test chamber 135
Bottom connects, and it is structurally characterized in that, described liquid thermostatic bath 101 inwall is provided with heat-preservation cotton layer 102, liquid thermostatic bath 101
Sidewall be additionally provided with spout hole 128, the top of liquid thermostatic bath 101 connects liquid constant temperature groove upper cap 118；
One can 104 being built-in with blower fan 107 is fixedly connected on liquid by lower fixing bolt 106 and upper fixing bolt 111
The sidepiece of body temperature chamber upper cover 118, the air outlet of blower fan 107 passes through the first heat exchange connecting pipe 109 and metallic heat exchanger tube
The other end connection of 134, the air intake vent of blower fan 107 passes through the second heat exchange connecting pipe 110 and is positioned at metallic test chamber 135
The metal housing 131 on top connects.
It is provided with rubber cushion 103 between described can 104 and liquid thermostatic bath 101 contact surface, is positioned at the wind of can 104
The periphery of the part of machine 107 and the first heat exchange connecting pipe 109 and the second heat exchange connecting pipe 110 is heat-preservation cotton layer
102.These heat-preservation cotton layers 102 ensure that the temperature of circulated gases in liquid in liquid thermostatic bath 101 and can 104
Constant.
One end that described first heat exchange connecting pipe 109 is connected with metallic heat exchanger tube 134 is the first connecting tube union joint
113, described first connecting tube union joint 113 is the tubular structure with external screw thread and blunt end, and described first connecting tube is even
Joint 113 is fastenedly connected with metallic heat exchanger tube 134 by the first clamp nut 114；
One end that described second heat exchange connecting pipe 110 connects with metal housing 131 is the second connecting tube union joint 115, institute
Stating the second connecting tube union joint 115 is the tubular structure with external screw thread and blunt end, described second connecting tube union joint 115
The tubular structure prominent with metal housing 131 sidewall by first clamp nut the second clamp nut 116 is fastenedly connected.Described
Connecting on metal housing 131 and have several metallic plates 126, one end of metallic plate 126 is welded on the outer wall of metal housing 131
On, the other end is connected by fixing bolt 127 is fixing with the fixing corner bracket 130 being welded on liquid thermostatic bath 101 inwall.
Metallic plate 126 is as support, it is ensured that the structural stability of metal housing 131.
Described metallic heat exchanger tube 134 and the first connecting tube union joint 113 junction are horn-like structure；Described metal housing
The tubular structure being connected with the second connecting tube union joint 115 on 131 also has horn-like structure.In use, connect
The round end of head is stuck in horn-like structure, is then fastened and fixed by the female thread of the external screw thread of union joint with fixing bolt, this
Planting the convenient dismounting of structure, air-tightness is also very good.
Described liquid constant temperature groove upper cap 118 is fixed padlock 112 and second by be positioned at both sides first and is fixed padlock 129 admittedly
Surely being connected to the top of liquid thermostatic bath 101, liquid constant temperature groove upper cap 118 and liquid thermostatic bath 101 contact surface are by sealing
Glue 117 is tightly connected.This structure makes liquid constant temperature groove upper cap 118 and liquid thermostatic bath 101 removably connect,
Use clip lock fixing during use, and fluid sealant 117 also ensure that the gas in metallic test chamber 135 does not leaks.
The middle part of described liquid constant temperature groove upper cap 118 connects to be had for fixed standard thermometer 122 and tested thermometer 123
Rubber stopper 120, the contact surface of described liquid constant temperature groove upper cap 118 and normal thermometer 122 is provided with fluid sealant 121, liquid
The contact surface of body temperature chamber upper cover 118 and tested thermometer 123 also is provided with fluid sealant 124, the upper table of described rubber stopper 120
Face is higher than the upper surface of liquid constant temperature groove upper cap 118, and rubber stopper 120 is provided with close with the contact surface of liquid constant temperature groove upper cap 118
Sealing 119.Here rubber stopper 120 is dismountable, and it is conveniently replaceable normal thermometer 122 and tested temperature after taking out
Meter 123.
The top in described metallic test chamber 135 is connected on the lower surface of rubber stopper 120, outside metallic test chamber 135 is by metal
The part of cover 131 closing is provided with the aperture 132 for aerofluxus, and the bottom in metallic test chamber 135 is funnel-shaped structure, metal
It it is the metal charge 136 with microcellular structure in funnel-shaped structure bottom test chamber 135.
The top of described metal housing 131 is connected on the lower surface of rubber stopper 120, metal housing 131 outer wall and liquid constant
The contact surface of temperature groove upper cap 118 is provided with fluid sealant 119；Which ensure that the gas in metallic test chamber 135 does not leaks.
The present invention is that metallic test chamber 135 and metal housing 31 are higher than liquid level installing the key problem in technology with when using, its
Upper end is about at the 1/3 of liquid constant temperature groove upper cap 118 bottom.Rubber stopper 120 stoppers test accent, and has fluid sealant 119
Sealing, normal thermometer 122 and tested thermometer 123 also have fluid sealant 121 and 124 to seal, so liquid and outside
Air will not enter in test chamber.Collection is overflowed by spout hole 128 during liquid thermal expansion.
Metallic test chamber 135 is soaked in a liquid, then the surfaces externally and internally temperature in metallic test chamber 135 is identical with temperature of liquid.Warp
Blower fan 107 drives, and air is in test chamber and heat-exchange tube internal circulation flow.For ensureing that air can be carried out fully with liquid
Heat exchange, the aperture of heat-exchange tube should not be too big, and the biggest heat-exchange tube is also not suitable in liquid constant temperature slot cavity body installing.
Generally, the aperture of metallic heat exchanger tube 134 about φ 10mm is advisable, and the diameter in metallic test chamber 135 is permissible
Reach more than φ 100mm.The aperture of metallic heat exchanger tube 134 about only has the 1/10 of test chamber diameter, and air is through blower fan 107
After driving, when entering bottom metallic test chamber 135, it will becoming one gas column, so this strand air-flow just can not be uniformly distributed
In metallic test chamber 135.Metallic test chamber 135 bottom design funnel also installs the metal charge with micropore
After 136, air-flow will be filled with metal thing 136 water conservancy diversion, so that air-flow is evenly distributed in metallic test chamber 135.
The part that metallic test chamber 135 is closed by metal housing 131 is provided with the aperture 132 for aerofluxus, and it makes metallic test
Air in chamber 135 is even in the metal housing 131 being enclosed within test chamber periphery, subsequently into the second heat exchange connecting pipe
110 air intake vents being back to blower fan 107.Test chamber top arranges the effect of metal housing 131, and one is that liquid barrier enters
Metallic test chamber 135, two is the air collecting metallic test chamber 135 internal reflux.As shown in 2, outside metal housing 131
Week totally 4 pieces of metallic plates 126, its one end is welded on metal housing 131.After removing liquid constant temperature groove upper cap 118, can
To see that totally 4 corner brackets 130 are respectively welded on the medial wall of liquid constant temperature slot cavity body.The other end of metallic plate 126 is logical
Cross fixing bolt 127 to be fixed on corner bracket 130.So metal housing 131 just can be fixedly mounted on the chamber of liquid thermostatic bath
In body.
Compared with prior art disclosed in the present invention and background technology, mainly solve problems with:
(1) need not extra air compressor and air drier；
(2) blower fan is incubated by heat-insulation layer, and air is after heat-exchange tube flows into blower fan, almost with constant temperature reflux to heat
Exchange pipe, so need not too long of metallic heat exchanger tube；
(3) different from using compressed air the method that empties, the air of circulation liquid temperature chamber hardly brings volume
Outer load, the original performance of liquid thermostatic bath will not be destroyed；
(4) stability, uniformity of air themperature field and temperature range in test chamber, identical with liquid thermostatic bath；
(5) air is all the time at heat-exchange tube and test cavity circulation, solves air and empties the problems such as the most energy-conservation.
Claims (8)
1. liquid constant temperature can be converted to a temperature testing device for air constant temperature, and it includes liquid thermostatic bath (101)
And it is positioned at the liquid thermostatic bath agitator (133) of liquid thermostatic bath (101), described liquid thermostatic bath agitator (133)
It is in transmission connection with being positioned at liquid thermostatic bath (101) the second driving motor (125) outward, described liquid thermostatic bath (101)
Inside it is provided with metallic test chamber (135) and is looped around the metallic heat exchanger tube (134) of metallic test chamber (135) periphery, institute
The bottom of one end and metallic test chamber (135) of stating metallic heat exchanger tube (134) connects, it is characterised in that described liquid
Temperature chamber (101) inwall is provided with heat-preservation cotton layer (102), and the sidewall of liquid thermostatic bath (101) is additionally provided with spout hole (128),
The top of liquid thermostatic bath (101) connects liquid constant temperature groove upper cap (118)；
One is built-in with the can (104) of blower fan (107) by lower fixing bolt (106) and upper fixing bolt (111)
Being fixedly connected on the sidepiece of liquid constant temperature groove upper cap (118), the air outlet of blower fan (107) passes through the first heat exchange connecting pipe
(109) other end with metallic heat exchanger tube (134) connects, and the air intake vent of blower fan (107) is by the second heat exchange even
Adapter (110) connects with the metal housing (131) being positioned at metallic test chamber (135) top；
The top of described metallic test chamber (135) is connected on the lower surface of rubber stopper (120), metallic test chamber (135)
The part closed by metal housing (131) is provided with the aperture (132) for aerofluxus, and the bottom of metallic test chamber (135) is
Funnel-shaped structure, is the metal charge (136) with microcellular structure in the funnel-shaped structure of metallic test chamber (135) bottom.
Liquid constant temperature can be converted to the temperature testing device of air constant temperature the most as claimed in claim 1, and its feature exists
In, it is provided with rubber cushion (103) between described can (104) and liquid thermostatic bath (101) contact surface, is positioned at can (104)
Outside interior blower fan (107) and the part of the first heat exchange connecting pipe (109) and the second heat exchange connecting pipe (110)
Zhou Junwei heat-preservation cotton layer (102).
Liquid constant temperature can be converted to the temperature testing device of air constant temperature the most as claimed in claim 1, and its feature exists
In, one end that described first heat exchange connecting pipe (109) is connected with metallic heat exchanger tube (134) is that the first connecting tube is connected
Head (113), described first connecting tube union joint (113) is the tubular structure with external screw thread and blunt end, described first
Connecting tube union joint (113) is fastenedly connected with metallic heat exchanger tube (134) by the first clamp nut (114)；
One end that described second heat exchange connecting pipe (110) connects with metal housing (131) is the second connecting tube union joint
(115), described second connecting tube union joint (115) is the tubular structure with external screw thread and blunt end, and described second even
Adapter union joint (115) is highlighted with metal housing (131) sidewall by the first clamp nut the second clamp nut (116)
Tubular structure be fastenedly connected.
Liquid constant temperature can be converted to the temperature testing device of air constant temperature the most as claimed in claim 1, and its feature exists
In, described liquid constant temperature groove upper cap (118) is fixed padlock (112) and second by be positioned at both sides first and is fixed padlock (129)
Being fixedly connected on the top of liquid thermostatic bath (101), liquid constant temperature groove upper cap (118) connects with liquid thermostatic bath (101)
Contacting surface is tightly connected by fluid sealant (117).
5. the temperature testing device that liquid constant temperature can be converted to air constant temperature as described in claim 1 or 4, its feature
Being, the middle part of described liquid constant temperature groove upper cap (118) connects to be had for fixed standard thermometer (122) and tested temperature
The rubber stopper (120) of meter (123), described liquid constant temperature groove upper cap (118) and the contact surface of normal thermometer (122)
Being provided with fluid sealant (121), the contact surface of liquid constant temperature groove upper cap (118) and tested thermometer (123) also is provided with fluid sealant
(124), the upper surface of described rubber stopper (120) is higher than the upper surface of liquid constant temperature groove upper cap (118), rubber stopper (120)
It is provided with fluid sealant (119) with the contact surface of liquid constant temperature groove upper cap (118).
Liquid constant temperature can be converted to the temperature testing device of air constant temperature the most as claimed in claim 1, and its feature exists
In, the top of described metal housing (131) is connected on the lower surface of rubber stopper (120), and metal housing (131) is outward
Wall is provided with fluid sealant (119) with the contact surface of liquid constant temperature groove upper cap (118)；
The upper connection of described metal housing (131) has several metallic plates (126), one end of metallic plate (126) to be welded on gold
Belong to outer housing (131) outer wall on, the other end by fixing bolt (127) be welded on liquid thermostatic bath (101) inwall
On fixing corner bracket (130) fixing connect.
7. the temperature testing device that liquid constant temperature can be converted to air constant temperature as described in claim 1 or 3, its feature
Being, described metallic heat exchanger tube (134) and the first connecting tube union joint (113) junction are horn-like structure.
Liquid constant temperature can be converted to the temperature testing device of air constant temperature the most as claimed in claim 3, and its feature exists
In, the upper tubular structure being connected with the second connecting tube union joint (115) of described metal housing (131) also has loudspeaker
Shape structure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410380145.9A CN104132755B (en) | 2014-08-04 | A kind of temperature testing device that liquid constant temperature can be converted to air constant temperature |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410380145.9A CN104132755B (en) | 2014-08-04 | A kind of temperature testing device that liquid constant temperature can be converted to air constant temperature |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104132755A CN104132755A (en) | 2014-11-05 |
| CN104132755B true CN104132755B (en) | 2017-01-04 |
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| CN203170337U (en) * | 2013-03-12 | 2013-09-04 | 东莞市升微机电设备科技有限公司 | Constant temperature and humidity test chamber air duct structure |
| CN204128714U (en) * | 2014-08-04 | 2015-01-28 | 广州赛宝计量检测中心服务有限公司 | A kind of temperature testing device that liquid constant temperature can be converted to air constant temperature |
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| US4858155A (en) * | 1985-12-24 | 1989-08-15 | Beckman Instruments, Inc. | Reaction temperature control system |
| CN2928229Y (en) * | 2006-07-31 | 2007-08-01 | 陈坚 | Constant temperature groove |
| CN200941055Y (en) * | 2006-07-31 | 2007-08-29 | 陈坚 | Air supply structure of temp/humidity verifying case |
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