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CN104132686B - Thermostatic temperature and humidity calibration box heated through liquid - Google Patents

Thermostatic temperature and humidity calibration box heated through liquid Download PDF

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Publication number
CN104132686B
CN104132686B CN201410380251.7A CN201410380251A CN104132686B CN 104132686 B CN104132686 B CN 104132686B CN 201410380251 A CN201410380251 A CN 201410380251A CN 104132686 B CN104132686 B CN 104132686B
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liquid
temperature
humidity
air
work chamber
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CN104132686A (en
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伍伟雄
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GUANGZHOU CEPREI CALIBRATION AND TESTING CENTER SERVICE CO Ltd
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GUANGZHOU CEPREI CALIBRATION AND TESTING CENTER SERVICE CO Ltd
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Abstract

The invention provides a thermostatic temperature and humidity calibration box heated through liquid. The thermostatic temperature and humidity calibration box heated through the liquid comprises a liquid thermostat, an air flue and a working chamber, wherein the liquid thermostat, the air flue and the working chamber are located in a temperature and humidity calibration box body. The thermostatic liquid in the liquid thermostat conducts heat exchange with air in the air flue through a metal plate located between the liquid thermostat and the air flue. The air flue is a narrow channel composed of the metal plate and a heat insulation cotton layer. The two ends of the air flue are connected and communicated with the two ends of the working chamber respectively. A draught fan for driving gas circulation is further arranged between the working chamber and the air flue. The communicating position between the bottom of the working chamber and the lower portion of the air flue is provided with a humidifier and a dehumidifier. The thermostatic temperature and humidity calibration box heated through the liquid can make the temperature within the range of 5-50 DEG C reach the level of +/-0.01 DEG C and +/-0.02 DEG C, the humidity within the range of 40%RH-90%RH reach the level of +/-0.2%RH and +/-0.3%RH and the wind speed be not higher than 0.2 m/s, so the thermostatic temperature and humidity calibration box heated through the liquid especially meets the requirements of JJG205-2005 mechanical hygrothermograph calibration rules.

Description

A kind of temperature/humidity verification box heated by liquid with constant temperature
Technical field
The present invention relates to a kind of Hygrothermograph, humiture recorder calibrating or calibration equipment, more particularly to one kind by Liquid heats the temperature/humidity verification box with constant temperature.
Background technology
Hygrothermograph, humiture recorder need to be placed on simultaneously together with standard one surely in calibrating or calibration Measurement is compared in fixed and uniform humiture environment.The effect of humiture standard test case, exactly produces such a steady Fixed and uniform humiture field.It is this by the calibrating being compared by test examination instrument and standard or the mode of calibration, humiture field Stability and uniformity just directly affects calibrating or calibrate result.Therefore, make great efforts to improve humiture standard test case Stability and uniformity, the uncertainty to reducing calibrating or calibrate has practical significance.
According to requirement of the mechanical Hygrothermograph vertification regulation in JJG205-2005 to humiture standard test case, in case Wind speed is not more than 0.2m/s, and within the temperature range of 5 DEG C~50 DEG C, temperature stability is not more than ± 0.2 DEG C, and temperature homogeneity is not More than 0.3 DEG C, in the humidity range of 40%RH~90%RH (temperature 20 DEG C when), humidity stability is not more than ± 0.8%RH, Humidity uniformity is not more than 1.0%RH.
Currently used for Hygrothermograph, the calibrating of humiture recorder or the humiture standard test case calibrated, at 5 DEG C~50 DEG C Within the temperature range of, the stability and uniformity of temperature can reach ± 0.2 DEG C and 0.3 DEG C;The stability of humidity and uniform Property, in the humidity range of 40%RH~90%RH (temperature 20 DEG C when), compares and can reach reluctantly ± 0.8%RH and 1.0%RH; And wind speed then also can not be less than 0.2m/s, and the wind speed of each position of working space is uneven, and difference is very big, each The wind speed of position is general all in more than 0.5m/s, and maximum has reached more than 2m/s.
Either dual-temperature process, dry and wet air blending method, or humidification the humiture standard test case that method makes such as dries, The air of working space is stirred using blower fan, to obtain the stable and uniform of working space humiture field.It is this to adopt The method stirred with blower fan is difficult to obtain the stable and uniform of wind speed, can not obtain little wind speed.
At present the design structure of the humiture standard test case that humidification drying method makes is as shown in Fig. 2 it is including warm and humid Degree calibrating box body 1 and the heat-insulation layer 2 on the madial wall of temperature/humidity verification box casing 1, set in temperature/humidity verification box casing 1 There are wind direction adjusting plate 3, blower fan 5, air-duct clapboard 3, heating element heater 7, air channel 8, refrigerator 9 and humidifier 10, wherein blower fan 5 is by position Fan driving motor 5 outside temperature/humidity verification box casing 1 drives, and also show the operation principle of temperature/humidity verification box; It arranges at the rear portion of working space and install in an air channel 8, air channel 8 heating element heater 7, refrigerator 9 (as dehumidifier, condensation Dehumidifying), humidifier 10.Air heated element 7, refrigerator 9 in air channel 8 directly heating and cooling down, humidified device 10 plus Wet, the blower fan 5 that the top of air channel 8 is installed is forced air circulation to working space, and again Jing working spaces bottom is back to wind to air Circulation is formed in road 8.
The major defect of above-mentioned design structure can be summarized as:
(1) heating surface (area) (HS of heating element heater is less, and air is insufficient with the heat exchange of heating surface, the sky flowed in air channel Gas, has considerable part without the heating surface directly contact with heating element heater, and this has resulted in partial air and has been themselves directly heated, and has Partial air is not themselves directly heated;It is similar to therewith, the refrigeration area of refrigerator is also less, identical problem can be caused;
(2) to the control of heating element heater, be a kind of power control of discontinuous, i.e. heating element heater be not a temperature stabilization Thermal source, be heated when this has resulted in air, when without be heated;
(3) using blower fan forced-air circulation, the flow behavior based on air, it is then not possible to obtain stable and uniform wind Speed;
(4) due to this operation principle, wind speed directly affects the heat exchange of air, generally requires larger wind speed and accelerates sky Heat exchange between gas and heating element heater and air and air between, could so obtain stable and uniform temperature control relatively System, therefore be also impossible to use less stirring wind speed, the stability and uniformity of otherwise humiture do not reach requirement.
Humidity in humiture standard test case represents that the definition of relative humidity is the temperature with humid air with relative humidity Degree condition is corresponding, and in air under the conditions of contained aqueous vapor identical, air themperature is different, then the relative humidity of air is different. Research shows, the aerial distribution of aqueous vapor is uniform, and relative humidity unstability and inhomogeneities are mainly due to temperature Unstable and uneven cause.The stability and uniformity for improving air humidity substantially mainly improves the steady of air themperature Qualitative and uniformity.Therefore, the stability and uniformity of humiture standard test case humidity are improved, is needed from raising air themperature Stability and uniformity are set about.
Poor thermal conductivity and thermal capacity it is little be air inherent characteristic, in contrast, thermal conductivity is good and thermal capacity is liquid greatly Inherent characteristic.
Using the humiture standard test case of structure fabrication shown in Fig. 2, i.e., using heating element heater, refrigerator directly to air Heating and cooling, by using blower fan stirring air flow is made, and the stability and uniformity of the air themperature for so obtaining is at 5 DEG C In~50 DEG C of temperature ranges, ± 0.2 DEG C and 0.3 DEG C are typically can only achieve.
Directly liquid is heated and is cooled down using heating element heater, refrigerator, make liquid flow by stirring, so design system The liquid thermostatic bath of work, the stability and uniformity of the fluid temperature for obtaining, in 5 DEG C~50 DEG C temperature ranges, it is easy to reach To ± 0.01 DEG C and 0.02 DEG C of level, than current humiture standard test case the above is several orders of magnitude higher.
The content of the invention
It is an object of the invention to provide a kind of temperature/humidity verification box heated by liquid with constant temperature, its temperature and humidity tool There are extraordinary stability and uniformity, its wind speed is less than 0.2m/s.
The present invention solves current humiture standard test case using heating element heater, refrigerator directly to air plus hot and cold But, it is impossible to obtain good stability and homogeneity question, directly stirring air using blower fan can not obtain little wind speed problem, this Invention is adopted the technical scheme that:
(1) air is heated and constant temperature using the liquid of temperature stabilization in liquid thermostatic bath, is solved heating element heater not It is the heat source of a temperature stabilization;
(2) heat exchanger plate is served as using one piece of large-area metallic plate, one face of metallic plate is by the liquid in liquid thermostatic bath Body constant temperature, another is heated and constant temperature in the face of air, and the heating surface (area) (HS for solving heating element heater is less, air and heating surface The insufficient problem of heat exchange;
(3) air circulation is driven using a kind of blower fan, blower fan gas outlet is a circular pipe, and one is produced in circular pipe Stock air-flow;
(4) working space upper and lower design funnel, the effect of upper funnel shape is to promote air uniformly to spread, The effect of lower hopper shape is to promote air uniformly to reclaim;
(5) a spherical micropore metal material ball is installed in the circular pipe gas outlet that blower fan is connected, and such air will It is decelerated and to surrounding diffusion;
(6) then below spherical micropore metal material ball one piece of micropore metal plate of material is installed, such air is further It is decelerated and equably flows to working space vertically downward, this addresses the problem the little wind speed problem of acquisition and wind speed uniformity problem;
(7) one piece of micropore metal plate of material is equally installed in equipment working space bottom, so promotes air equably vertical Flow downward, be then uniformly recycled in regulation air channel by the funnel-shaped structure of working space bottom;
(8) air channel adopts and narrows design, and the 1/10 of about only current air channel, be so conducive to air to enter with thermostat metal plate The sufficient heat exchange of row;
(9), directly to air heating, cooling and constant temperature, larger wind speed ability is needed with using heating element heater, refrigerator The relatively stable and uniform different of aerial temperature and humidity are obtained, on the contrary, as a result of large-area thermostat metal plate to sky Gas is heated and constant temperature, and air channel, using design is narrowed, at this moment air slowly flows across air channel, is more beneficial for air and thermostat metal Plate carries out sufficient heat exchange.Therefore conversely, the structure of the present invention enables little wind speed to obtain more preferable humiture stability and Even property.
The concrete structure of the present invention is that it includes temperature/humidity verification box casing and is filled in temperature/humidity verification box casing Heat-preservation cotton layer on the wall of side, it is characterised in that it also includes liquid constant temperature device, the wind being located in temperature/humidity verification box casing Road and work chamber, the isothermal liquid Jing in the liquid constant temperature device is located at the metallic plate between liquid constant temperature device and air channel Heat exchange is carried out with the air in air channel, the air channel is the slype being made up of metallic plate and heat-preservation cotton layer, the two of air channel End connects respectively the two ends connection of work chamber, is additionally provided between work chamber and air channel for the blower fan of drive gas body circulation. The work chamber bottom is provided with humidifier and dehumidifier for adjusting gas temperature and humidity with air channel bottom connectivity part.
The periphery of the blower fan is heat-preservation cotton layer, which ensure that the heat from air channel gas does not lose, it is ensured that gas temperature The uniformity of degree;The blower fan is connected with the first motor being fixed on outside temperature/humidity verification box casing.The air channel Upper end connect with the air inlet of blower fan, the gas outlet of the blower fan be located in work chamber with spherical microcellular structure Metal ball is connected by circular pipe;The upper end of the metallic plate and the junction of temperature/humidity verification box cabinet wall be provided with for Liquid sealant in sealing liquid thermostatic bath.
The liquid constant temperature device includes liquid thermostatic bath and the liquid thermostatic bath agitator in liquid thermostatic bath, The liquid thermostatic bath agitator and the second motor being fixed on the outside of temperature/humidity verification box casing, the liquid thermostatic bath Upper portion side wall be provided with spout hole and the fluid sealant for sealing liquid in liquid thermostatic bath.
The top of the work chamber is handstand funnel structure, and the bottom of work chamber is funnel structure, the metal ball Positioned at the handstand funnel structure top of work chamber, metal ball is provided with tip and points to the metal ball centre of sphere with the connectivity part of circular pipe Bellmouth, the air from blower fan enters metal ball through circular pipe, due to the effect of bellmouth so that gas is first concentrated Uniformly spread out by the microcellular structure of metal ball afterwards;Upper micropore metal is fixed with the work chamber immediately below metal ball Plate of material;Abut in the work chamber and lower micropore metal plate of material is fixed with directly over the funnel structure of bottom, upper micropore gold Category plate of material and lower micropore metal plate of material ensure that the stability and uniformity of temperature/humidity verification box wind speed.The upper micropore gold Category plate of material and lower micropore metal plate of material are fixedly connected on work chamber by coupled corner bracket by fixing screws On madial wall.
Beneficial effects of the present invention are:The present invention be directed to the deficiency of existing humiture standard test case is redesigned , it in 5 DEG C~50 DEG C temperature ranges of humiture standard test case, the stability and uniformity of temperature is able to reach ± 0.01 DEG C and 0.02 DEG C of level;In the humidity range of 40%RH~90%RH, the stability of humidity and uniformity distinguish energy Enough reach the level of ± 0.2%RH and 0.3%RH;Wind speed in case is not more than 0.2m/s.It is humiture standard test case temperature Degree, humidity, the stability of wind speed and uniformity bring up to a new height, particularly meet the mechanical temperature in JJG205-2005 Wind speed required by hygrometer vertification regulation is not more than the requirement of 0.2m/s.
Description of the drawings
Fig. 1 is the structural representation of the present invention.
The structural representation of the humiture standard test case before Fig. 2 the present patent application days.
In figure, 1, temperature/humidity verification box casing 2, heat-insulation layer 3, wind direction adjusting plate 4, fan driving motor 5, blower fan 6th, air-duct clapboard 7, heating element heater 8, air channel 9, refrigerator 10, humidifier.,
Specific embodiment
The specific embodiment of the present invention is described further below in conjunction with the accompanying drawings.
The structure design by liquid heating and the humiture standard test case of constant temperature of the present invention is as follows:Liquid thermostatic bath Into the metallic plate 120 without heat-insulation layer, block of metal plate 120 serves as humiture standard test case to 115 lateral layout The whole side of the inside of air channel 119.One face of metallic plate 120 is heated and constant temperature by the liquid of liquid thermostatic bath 115, using gold The good heat conductivility of category, another face just can so be achieved that heating of the liquid to air to air heating and constant temperature And constant temperature.Due to the inherent characteristic that liquid thermal conductivity is good, thermal capacity is big etc., the fluid temperature stability in liquid thermostatic bath 115 Very good with uniformity, the temperature stability and uniformity of block of metal plate 120 are basic with fluid temperature stability and uniformity Identical, metallic plate 120 is just into temperature stabilization again uniform thermostat metal plate.Which solves current humiture standard test Case uses the thermal source that heating element heater is not temperature stabilization, the again little problem of heating surface (area) (HS.
Humidifier 121 and dehumidifier 122 are designed in the bottom of work chamber 104, the air channel 119 of thermostat metal plate side Using design is narrowed, the benefit for narrowing is to enable air to more fully contact with thermostat metal plate, to enter with thermostat metal plate The sufficient heat exchange of row.
The air channel 119 of humiture standard test case is designed the top for extending to work chamber 104, and is similarly installed at top The air intake vent connection of the blower fan 108 in portion.The air outlet of blower fan 108 is connected with circular pipe, and circular pipe leaks with work chamber 104 Bucket-shaped top connection.Air can obtain one stable air-flow Jing after blower fan compression in circular pipe.Generally, The bore of the air outlet of circular pipe, it is less than square working space cross section, at this moment there is spherical micropore by one Ball of metallic material is slowed down and water conservancy diversion, then by the thorough water conservancy diversion of one piece of micropore metal plate of material.It is empty that air-flow flows through from top to bottom work Between after, equally by one piece of bottom micropore metal plate of material, water conservancy diversion be recycled to regulation air channel in formed circulate.
Highly stable and uniform so as to obtain a kind of temperature, humidity, wind speed by design described above, wind speed is again little Humiture standard test case.
The present invention be by structure in detail below realize, as shown in figure 1, it include temperature/humidity verification box casing 109 with And the heat-preservation cotton layer 105 being connected on the madial wall of temperature/humidity verification box casing 109, it is characterised in that it is also included positioned at warm and humid Liquid constant temperature device, air channel 119 and work chamber 104 in degree calibrating box body 109, the constant temperature in the liquid constant temperature device Liquid Jing is located at the metallic plate 120 between liquid constant temperature device and air channel 119 and carries out heat exchange, institute with the air in air channel 119 It is the slype being made up of metallic plate 120 and heat-preservation cotton layer 105 to state air channel 119, and the two ends in air channel 119 connect respectively work The two ends connection of chamber 104, is additionally provided with the blower fan 108 for drive gas body circulation between work chamber 104 and air channel 119, its As long as the blast of middle blower fan 108 can reach the pressure driven needed for air circulation.The bottom of the work chamber 104 and wind The bottom connectivity part of road 119 is provided with humidifier 121 and dehumidifier 122 for adjusting gas temperature and humidity.
The periphery of the blower fan 108 is heat-preservation cotton layer 105, which ensure that the heat from the gas of air channel 123 does not lose, and is protected The uniformity of card gas temperature;The blower fan 108 and the first motor 107 being fixed on outside temperature/humidity verification box casing 109 It is connected.The upper end in the air channel 119 connects with the air inlet 111 of blower fan 108, the gas outlet 110 of the blower fan 108 with The metal ball 112 with spherical microcellular structure in work chamber 104 is connected by circular pipe;The metallic plate 120 The junction of upper end and the inwall of temperature/humidity verification box casing 109 be provided with for sealing liquid sealant in liquid thermostatic bath 115 113。
The liquid constant temperature device includes liquid thermostatic bath 115 and the liquid thermostatic bath in liquid thermostatic bath 115 Agitator 118, the liquid thermostatic bath agitator 118 and the second driving electricity for being fixed on the outside of temperature/humidity verification box casing 109 Machine 114, the upper portion side wall of the liquid thermostatic bath 115 is provided with spout hole 117 and for sealing liquid in liquid thermostatic bath 115 Fluid sealant 116.
The top of the work chamber 104 is handstand funnel structure, and the bottom of work chamber 104 is funnel structure, described Metal ball 112 is located at the handstand funnel structure top of work chamber 104, and metal ball 112 is provided with point with the connectivity part of circular pipe The bellmouth of the centre of sphere of metal ball 112 is pointed at end, and the air from blower fan 108 enters metal ball 112 through circular pipe, due to cone The effect in shape hole so that gas is uniformly spread out after first concentrating by the microcellular structure of metal ball 112;Against metal ball 112 just Micropore metal plate of material 106 is fixed with the work chamber 104 of lower section;Bottom infundibular ganglion is abutted in the work chamber 104 Lower micropore metal plate of material 101, upper micropore metal plate of material 106 and lower micropore metal plate of material 101 are fixed with directly over structure Ensure that the stability and uniformity of temperature/humidity verification box wind speed.The upper micropore metal plate of material 106 and lower micropore metal material Flitch 101 is fixedly connected on the madial wall of work chamber 104 by coupled corner bracket 103 by fixing screws 102.
The operation principle of the present invention is such.
Due to the insulation effect of heat-preservation cotton layer 105 so that the liquid and air channel 119 and work in liquid thermostatic bath 115 The gas temperature of chamber 104 it is constant, the isothermal liquid in liquid thermostatic bath 115 is by the heating air duct 119 of metallic plate 120 Gas;Because metallic plate 120 is a whole side wall in air channel 119, the gas in whole air channel 119 is heated simultaneously, this guarantor Temperature homogeneity of the gas in initial period in air channel 119 is demonstrate,proved;
Blower fan 108 under the drive of the first motor 107, gas of the compressible drive in air channel 119, and by gas The top of work chamber 104 is transported to, the top of work chamber 104 is handstand funnel-form, beneficial to gas in work chamber 104 Interior uniform diffusion, gas sequentially pass through from the top down the deceleration of the metal ball 112 with spherical microcellular structure and diffusion and The deceleration of upper micropore metal plate of material 106 and lower micropore metal plate of material 101 and water conservancy diversion, then through the bottom of work chamber 104 Funnel structure concentrate and enter air channel 119, while when into air channel 119, air will be by the humidification positioned at the bottom of air channel 119 Device 121 and dehumidifier 122 carry out the regulation of temperature and humidity, air channel 119 are then back to from bottom to top, again with liquid constant temperature Liquid in groove 115 carries out heat exchange, and then completes whole circulation.
Compared with the structure for illustrating the conventional apparatus shown in Fig. 2, feature of present invention point is summarized as follows:
(1) current method is directly heated to air and cooled down using heating element heater and refrigerator, and the present invention uses liquid Temperature stabilization and uniform liquid, are heated and constant temperature to air in thermostat, the air themperature being achieved in that and liquid temperature Degree is essentially identical, and stability is also essentially identical;The raising of temperature stability, while the stability for making humidity is improved;
(2) using general blower fan to the direct stirring of air, the present invention produces one air-flow to current method using blower fan, Then using spherical micropore metal material ball and micropore metal plate of material, air-flow is slowed down and water conservancy diversion, so as to obtain it is little, Stable and uniform wind speed;
(3) working space upper and lower design funnel, the effect of upper funnel shape is to promote air uniformly to spread, The effect of lower hopper shape is to promote air uniformly to reclaim;
(4) dehumidifier and humidifier are designed in working space bottom;
(5) air channel is designed to extend to working space top;
(6) design that this method is narrowed using air channel, the 1/10 of about only current air channel, enable air to more fully enter Row heat exchange.
The invention by liquid heating and constant temperature humiture standard test case, as a result of in liquid thermostatic bath Liquid air is heated and constant temperature mode, the stability of resulting humiture standard test case temperature and uniform Property, it is essentially identical with the stability of liquid thermostatic bath and uniformity;Within the temperature range of 5 DEG C~50 DEG C, air themperature it is steady Qualitative and uniformity, has reached the level of ± 0.01 DEG C and 0.02 DEG C;In the humidity range of 40%RH~90%RH, humidity Stability and uniformity, have reached the level of ± 0.2%RH and 0.3%RH.As a result of spherical micropore metal material ball and Micropore metal plate of material is slowed down and water conservancy diversion to air-flow, obtains the wind speed less than 0.2m/s.

Claims (7)

1. it is a kind of by liquid heating and constant temperature temperature/humidity verification box, it include temperature/humidity verification box casing (109) and filling Heat-preservation cotton layer (105) on temperature/humidity verification box casing (109) madial wall, it is characterised in that it also includes being located at humiture Liquid constant temperature device, air channel (119) and work chamber (104) in calibrating box body (109), in the liquid constant temperature device The metallic plate (120) that isothermal liquid Jing is located between liquid constant temperature device and air channel (119) is carried out with the air in air channel (119) Heat exchange, the air channel (119) is the slype being made up of metallic plate (120) and heat-preservation cotton layer (105), air channel (119) Two ends connect respectively the two ends connection of work chamber (104), are additionally provided with for driving between work chamber (104) and air channel (119) The blower fan (108) of body circulation of taking offence;
The gas outlet (110) of the blower fan (108) and the metal ball with spherical microcellular structure being located in work chamber (104) (112) connected by circular pipe;
The top of the work chamber (104) is handstand funnel structure, and the bottom of work chamber (104) is funnel structure, described Metal ball (112) with spherical microcellular structure positioned at work chamber (104) handstand funnel structure top, with spherical micropore The metal ball (112) of structure is provided with tip and points to the metal ball (112) with spherical microcellular structure with the connectivity part of circular pipe The bellmouth of the centre of sphere;It is fixed with work chamber (104) immediately below the metal ball (112) with spherical microcellular structure Micropore metal plate of material (106);Abut in the work chamber (104) and lower micropore gold is fixed with directly over the funnel structure of bottom Category plate of material (101).
2. as claimed in claim 1 by liquid heating and the temperature/humidity verification box of constant temperature, it is characterised in that the work chamber (104) bottom is provided with humidifier (121) and dehumidifier for adjusting gas temperature and humidity with air channel (119) bottom connectivity part (122)。
3. as claimed in claim 1 by liquid heating and the temperature/humidity verification box of constant temperature, it is characterised in that the blower fan (108) periphery be heat-preservation cotton layer (105), the blower fan (108) be fixed on first outward of temperature/humidity verification box casing (109) Motor (107) is connected.
4. as claimed in claim 1 by liquid heating and the temperature/humidity verification box of constant temperature, it is characterised in that the liquid constant temperature Device includes liquid thermostatic bath (115) and the liquid thermostatic bath agitator (118) in liquid thermostatic bath (115), described Liquid thermostatic bath agitator (118)) with the second motor (114) being fixed on the outside of temperature/humidity verification box casing (109), institute The upper portion side wall for stating liquid thermostatic bath (115) is provided with spout hole (117) and for sealing the interior liquid of liquid thermostatic bath (115) Fluid sealant (116).
5. as claimed in claim 1 by liquid heating and the temperature/humidity verification box of constant temperature, it is characterised in that the air channel (119) upper end connects with the air inlet (111) of blower fan (108).
6. as claimed in claim 1 by liquid heating and the temperature/humidity verification box of constant temperature, it is characterised in that the metallic plate (120) upper end is provided with for sealing the interior liquid of liquid thermostatic bath (115) with the junction of temperature/humidity verification box casing (109) inwall Body fluid sealant (113).
7. as claimed in claim 6 by liquid heating and the temperature/humidity verification box of constant temperature, it is characterised in that the upper micropore gold Category plate of material (106) and lower micropore metal plate of material (101) are by coupled corner bracket (103) by fixing screws (102) It is fixedly connected on the madial wall of work chamber (104).
CN201410380251.7A 2014-08-04 2014-08-04 Thermostatic temperature and humidity calibration box heated through liquid Active CN104132686B (en)

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CN113867454B (en) * 2021-09-26 2022-05-03 北京市东城区计量检测所 Humiture verification box capable of realizing full-automatic control and metering detection

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