CN104132686A - Thermostatic temperature and humidity calibration box heated through liquid - Google Patents
Thermostatic temperature and humidity calibration box heated through liquid Download PDFInfo
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- CN104132686A CN104132686A CN201410380251.7A CN201410380251A CN104132686A CN 104132686 A CN104132686 A CN 104132686A CN 201410380251 A CN201410380251 A CN 201410380251A CN 104132686 A CN104132686 A CN 104132686A
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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
Technical field
The equipment that the present invention relates to a kind of Hygrothermograph, the calibrating of humiture registering instrument or calibration use, relates in particular to a kind of temperature/humidity verification box by heating liquid and constant temperature.
Background technology
Hygrothermograph, humiture registering instrument, in the time of calibrating or calibration, need to be placed in a stable and uniform humiture environment simultaneously and compare measurement together with standard.The effect of humiture useful test case, just a kind of so stable and uniform humiture of generation field.This by the calibrating being compared by test examination instrument and standard or the mode of calibration, the stability of humiture field and homogeneity have just directly affected the result of calibrating or calibration.Therefore, make great efforts to improve stability and the homogeneity of humiture useful test case, the uncertainty that reduces calibrating or calibration is had to practical significance.
Requirement according to JJG205-2005 mechanical type Hygrothermograph vertification regulation to humiture useful test case, wind speed in case is not more than 0.2m/s, in the temperature range of 5 DEG C～50 DEG C, temperature stability is not more than ± and 0.2 DEG C, temperature homogeneity is not more than 0.3 DEG C, in the humidity range of 40%RH～90%RH (temperature 20 DEG C time), be not more than ± 0.8%RH of humidity stability, humidity uniformity is not more than 1.0%RH.
For the humiture useful test case of Hygrothermograph, the calibrating of humiture registering instrument or calibration, in the temperature range of 5 DEG C～50 DEG C, the stability of temperature and homogeneity, can reach ± 0.2 DEG C and 0.3 DEG C at present; The stability of humidity and homogeneity, in the humidity range of 40%RH～90%RH (temperature 20 DEG C time), can reach more reluctantly ± 0.8%RH and 1.0%RH; Wind speed does not also have to be less than 0.2m/s, and the wind speed of each position of work space is inhomogeneous, and difference is very large, the wind speed of each position generally all more than 0.5m/s, maximum reached 2m/s more than.
No matter be dual-temperature process, dry wet gas current mixing method, or the humiture useful test case made of the humidification method such as dry, all adopt blower fan to stir the air of work space, to obtain the stable of work space humiture field and evenly.The method that this employing blower fan stirs is just difficult to obtain stablizing and evenly, can not obtaining little wind speed of wind speed.
The project organization of the humiture useful test case that humidification drying method is made at present as shown in Figure 2, it comprises temperature/humidity verification box casing 1 and is positioned at the heat-insulation layer 2 on temperature/humidity verification box casing 1 madial wall, in temperature/humidity verification box casing 1, be provided with wind direction adjusting plate 3, blower fan 5, air-duct clapboard 3, heating element 7, air channel 8, refrigerator 9 and humidifier 10, wherein blower fan 5 is driven by the fan driving motor 5 being positioned at outside temperature/humidity verification box casing 1, and has shown the principle of work of temperature/humidity verification box; It arranges an air channel 8 at the rear portion of work space, the interior installation heating element 7 in air channel 8, refrigerator 9 (doubling as dehumidifier, dehumidification by condensation), humidifier 10.Air is the interior direct heating and cooling through heating element 7, refrigerator 9 in air channel 8, and through humidifier 10 humidifications, the blower fan 5 that install on 8 tops, air channel is forced air circulation to work space, and air is back to the interior formation circulation in air channel 8 again through work space bottom.
The major defect of above-mentioned project organization can be summarized as:
(1) heating surface (area) (HS of heating element is less, the heat interchange of air and hot face is insufficient, and mobile air in air channel has considerable part directly to contact with the hot face of heating element, this has just caused part air directly to be heated, and has part air directly not heated; Similar with it, the refrigeration area of refrigerator is also less, can cause identical problem;
(2) control to heating element, is a kind of energising control of discontinuous, and heating element is not the thermal source of a temperature stabilization, when this has just caused air and be heated, time and not heated;
(3) use blower fan forced-air circulation, based on the flow characteristics of air, just can not obtain stable and uniform wind speed;
(4) due to this principle of work, wind speed directly affects the heat interchange of air, generally need larger wind speed to accelerate the heat interchange between air and heating element and between air and air, could obtain so relatively stable and uniform temperature control, therefore just can not use less stirring wind speed, otherwise the stability of humiture and homogeneity do not reach requirement yet.
Humidity in humiture useful test case represents by relative humidity, and the definition of relative humidity is corresponding with the temperature conditions of soft air, under the condition that in air, contained aqueous vapor is identical, and air themperature difference, the relative humidity difference of air.Research shows, the aerial distribution of aqueous vapor is that relative humidity instability and unevenness are mainly unstable and inhomogeneous the causing due to temperature uniformly.The stability and the homogeneity that improve air humidity are in fact mainly to improve stability and the homogeneity of air themperature.Therefore, improve stability and the homogeneity of humiture useful test case humidity, need to set about from improving air themperature stability and homogeneity.
Poor thermal conductivity and thermal capacity are little is the inherent characteristic of air, and in contrast, the good and thermal capacity of thermal conductivity is greatly the inherent characteristic of liquid.
Use the humiture useful test case of structure fabrication shown in Fig. 2, use heating element, refrigerator directly to air heat and cooling, make Air Flow by using blower fan to stir, the stability of the air themperature obtaining like this and homogeneity, in 5 DEG C～50 DEG C temperature ranges, generally can only reach ± 0.2 DEG C and 0.3 DEG C.
Use heating element, refrigerator directly to heating liquid and cooling, make liquid flow by stirring, the liquid thermostatic bath designing and producing like this, the stability of the fluid temperature obtaining and homogeneity, in 5 DEG C～50 DEG C temperature ranges, be easy to reach ± level of 0.01 DEG C and 0.02 DEG C, more than exceeding several orders of magnitude than current humiture useful test case.
Summary of the invention
The object of this invention is to provide a kind of temperature/humidity verification box by heating liquid and constant temperature, its temperature and humidity has extraordinary stability and homogeneity, and its wind speed is less than 0.2m/s.
The invention solves current humiture useful test case adopts heating element, refrigerator directly to air heat and cooling, can not obtain good stability and homogeneity question, adopt blower fan directly to stir air and can not obtain little wind speed problem, the technical scheme that the present invention takes is:
(1) use the liquid of temperature stabilization in liquid thermostatic bath to heat and constant temperature air, solving heating element is not the heat source of a temperature stabilization;
(2) use a large-area sheet metal to serve as heat exchanger plate, face of sheet metal is by the liquid constant temperature in liquid thermostatic bath, another heats and constant temperature in the face of air, and the heating surface (area) (HS that solves heating element is less, the insufficient problem of heat interchange of air and hot face;
(3) use a kind of blower fan to drive air circulation, blower fan gas outlet is a circular pipe, produces one air-flow in circular pipe;
(4) work space upper and lower is designed to funnel-form, and the effect of upper funnel shape is to impel air evenly to spread, and the effect of lower hopper shape is to impel air evenly to reclaim;
(5) a spherical micropore metal material ball is installed in the circular pipe gas outlet that blower fan connects, and air will be slowed down and spread to surrounding like this;
(6) then below spherical micropore metal material ball, a micropore metal plate of material is installed, air is further slowed down and is flowed to vertically downward work space equably like this, has so just solved little wind speed problem and the even problem of wind speed of obtaining;
(7) a micropore metal plate of material of the same installation in equipment work space bottom, impels air to flow vertically downward equably like this, is then evenly recycled to and regulates in air channel by the funnel-shaped structure of work space bottom;
(8) air channel adopts and narrows design, approximately only has 1/10 of current air channel, is conducive to like this air and thermostat metal plate carries out sufficient heat interchange;
(9) with adopt heating element, refrigerator directly to air heat, cooling and constant temperature, need larger wind speed could obtain the relatively stable and even difference of aerial temperature and humidity, just the opposite, owing to having adopted large-area thermostat metal plate to air heat and constant temperature, and air channel employing narrows design, at this moment air slowly flows through air channel, is more conducive to air and thermostat metal plate carries out sufficient heat interchange.Therefore contrary, structure of the present invention makes little wind speed can obtain better humiture stability and homogeneity.
Concrete structure of the present invention is, it comprises temperature/humidity verification box casing and is filled in the heat-preservation cotton layer on temperature/humidity verification box box inside wall, it is characterized in that, it also comprises the liquid constant temperature device that is positioned at temperature/humidity verification box casing, air channel and work chamber, isothermal liquid in described liquid constant temperature device carries out heat interchange through the air in sheet metal and air channel between liquid constant temperature device and air channel, described air channel is the slype being made up of sheet metal and heat-preservation cotton layer, the two ends that the two ends in air channel connect respectively work chamber are communicated with, between work chamber and air channel, be also provided with the blower fan for driving gas circulation.Described work chamber bottom is provided with humidifier and the dehumidifier for adjustments of gas temperature and humidity with bottom, air channel connectivity part.
The periphery of described blower fan is heat-preservation cotton layer, and this has ensured not lose from the heat of air channel gas, ensures the homogeneity of gas temperature; Described blower fan is in transmission connection with the first drive motor being fixed on outside temperature/humidity verification box casing.The upper end in described air channel is communicated with the air intake opening of blower fan, and the gas outlet of described blower fan is communicated with by circular pipe with the Metal Ball with spherical microcellular structure that is positioned at work chamber; The junction of the upper end of described sheet metal and temperature/humidity verification box cabinet wall is provided with for liquid sealant in seal fluid calibration cell.
Described liquid constant temperature device comprises liquid thermostatic bath and is positioned at the liquid thermostatic bath stirrer of liquid thermostatic bath, described liquid thermostatic bath stirrer and the second drive motor that is fixed on temperature/humidity verification box casing outside, the upper portion side wall of described liquid thermostatic bath is provided with spout hole and the fluid sealant for liquid in seal fluid calibration cell.
The top of described work chamber is handstand funnel structure, the bottom of work chamber is funnel structure, described Metal Ball is positioned at the handstand funnel structure top of work chamber, the connectivity part of Metal Ball and circular pipe is provided with the most advanced and sophisticated bellmouth that points to the Metal Ball centre of sphere, air from blower fan enters Metal Ball through circular pipe, due to the effect of bellmouth, make gas first concentrate after evenly spread out by the microcellular structure of Metal Ball; Near being fixed with upper micropore metal plate of material in the work chamber under Metal Ball; In described work chamber, near being fixed with lower micropore metal plate of material directly over the funnel structure of bottom, upper micropore metal plate of material and lower micropore metal plate of material have ensured stability and the homogeneity of temperature/humidity verification box wind speed.Described upper micropore metal plate of material and lower micropore metal plate of material are all fixedly connected on the madial wall of work chamber by gib screw by coupled corner bracket.
Beneficial effect of the present invention is: the present invention be directed to that the deficiency of existing humiture useful test case redesigns, it is in 5 DEG C～50 DEG C temperature ranges of humiture useful test case, and the stability of temperature and homogeneity can reach respectively ± level of 0.01 DEG C and 0.02 DEG C; In the humidity range of 40%RH～90%RH, the level of can reach respectively ± 0.2%RH of the stability of humidity and homogeneity and 0.3%RH; Wind speed in case is not more than 0.2m/s.It brings up to a new height the stability of humiture useful test case temperature, humidity, wind speed and homogeneity, particularly meets the requirement that the JJG205-2005 desired wind speed of mechanical type Hygrothermograph vertification regulation is not more than 0.2m/s.
Brief description of the drawings
Fig. 1 is structural representation of the present invention.
The structural representation of the humiture useful test case before Fig. 2 the present patent application day.
Temperature/humidity verification box casing 2, heat-insulation layer 3, wind direction adjusting plate 4, fan driving motor 5, blower fan 6, air-duct clapboard 7, heating element 8, air channel 9, refrigerator 10, humidifier in the drawings, 1.，
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described further.
The structural design of the humiture useful test case by heating liquid and constant temperature of the present invention is as follows: a lateral layout of liquid thermostatic bath 115 is become not have to the sheet metal 120 of heat-insulation layer, block of metal plate 120 serves as the whole side of 119 the insides, air channel of humiture useful test case.A face of sheet metal 120, by heating liquid and the constant temperature of liquid thermostatic bath 115, utilizes the heat conductivility that metal is good, and another face just can be to air heat and constant temperature, has so just realized heating and the constant temperature of liquid to air.Due to the inherent characteristic that liquid thermal conductivity is good, thermal capacity is large etc., fluid temperature stability in liquid thermostatic bath 115 and homogeneity are very good, the temperature stability of block of metal plate 120 and homogeneity, basic identical with fluid temperature stability and homogeneity, sheet metal 120 has just become temperature stabilization uniform thermostat metal plate again.This has just solved current humiture useful test case use heating element is not the thermal source of temperature stabilization, the problem that heating surface (area) (HS is again little.
Humidifier 121 and dehumidifier 122 are designed to the bottom in work chamber 104, the air channel 119 of thermostat metal plate side adopts narrows design, the benefit narrowing is that air can be contacted with thermostat metal plate more fully, to carry out sufficient heat interchange with thermostat metal plate.
The air channel 119 of humiture useful test case is designed to extend to the top of work chamber 104, connects with the air intake vent of the same blower fan 108 that is arranged on top.The air outlet of blower fan 108 is connected with circular pipe, and circular pipe is connected with work chamber 104 funnelform top.Air, after blower fan compression, can obtain one stable air-flow in circular pipe.Generally, the bore of the air outlet of circular pipe, less than square work space xsect, at this moment slow down and water conservancy diversion by a ball of metallic material with spherical micropore, then by a thorough water conservancy diversion of micropore metal plate of material.After air-flow flows through work space from top to bottom, equally by one of bottom micropore metal plate of material, water conservancy diversion is recycled to regulate in air channel and forms and circulate.
By design described above, thereby it is highly stable and even to obtain a kind of temperature, humidity, wind speed, the humiture useful test case that wind speed is again little.
The present invention realizes by following concrete structure, as shown in Figure 1, it comprises temperature/humidity verification box casing 109 and is connected to the heat-preservation cotton layer 105 on temperature/humidity verification box casing 109 madial walls, it is characterized in that, it also comprises the liquid constant temperature device that is positioned at temperature/humidity verification box casing 109, air channel 119 and work chamber 104, isothermal liquid in described liquid constant temperature device carries out heat interchange through the sheet metal 120 between liquid constant temperature device and air channel 119 and the air in air channel 119, described air channel 119 is the slypes that are made up of sheet metal 120 and heat-preservation cotton layer 105, the two ends that the two ends in air channel 119 connect respectively work chamber 104 are communicated with, between work chamber 104 and air channel 119, be also provided with the blower fan 108 for driving gas circulation, as long as wherein the blast of blower fan 108 can reach and drive the required pressure of air circulation.Described work chamber 104 bottoms and air channel 119 bottom connectivity parts are provided with humidifier 121 and the dehumidifier 122 for adjustments of gas temperature and humidity.
The periphery of described blower fan 108 is heat-preservation cotton layer 105, and this has ensured not lose from the heat of air channel 123 gases, ensures the homogeneity of gas temperature; Described blower fan 108 is in transmission connection with the first drive motor 107 being fixed on outside temperature/humidity verification box casing 109.The upper end in described air channel 119 is communicated with the air intake opening 111 of blower fan 108, the gas outlet 110 of described blower fan 108 be communicated with by circular pipe with the Metal Ball with spherical microcellular structure 112 that is positioned at work chamber 104; The junction of the upper end of described sheet metal 120 and temperature/humidity verification box casing 109 inwalls is provided with for the interior liquid sealant 113 of seal fluid calibration cell 115.
Described liquid constant temperature device comprises liquid thermostatic bath 115 and is positioned at the liquid thermostatic bath stirrer 118 of liquid thermostatic bath 115, described liquid thermostatic bath stirrer 118 and the second drive motor 114 that is fixed on temperature/humidity verification box casing 109 outsides, the upper portion side wall of described liquid thermostatic bath 115 is provided with spout hole 117 and the fluid sealant 116 for seal fluid calibration cell 115 interior liquid.
The top of described work chamber 104 is handstand funnel structure, the bottom of work chamber 104 is funnel structure, described Metal Ball 112 is positioned at the handstand funnel structure top of work chamber 104, Metal Ball 112 is provided with the most advanced and sophisticated bellmouth that points to Metal Ball 112 centre ofs sphere with the connectivity part of circular pipe, air from blower fan 108 enters Metal Ball 112 through circular pipe, due to the effect of bellmouth, make gas first concentrate after evenly spread out by the microcellular structure of Metal Ball 112; Near being fixed with upper micropore metal plate of material 106 in the work chamber 104 under Metal Ball 112; In described work chamber 104, near being fixed with lower micropore metal plate of material 101 directly over the funnel structure of bottom, upper micropore metal plate of material 106 and lower micropore metal plate of material 101 have ensured stability and the homogeneity of temperature/humidity verification box wind speed.Described upper micropore metal plate of material 106 and lower micropore metal plate of material 101 are all fixedly connected on the madial wall of work chamber 104 by gib screw 102 by coupled corner bracket 103.
Principle of work of the present invention is such.
Due to the insulation effect of heat-preservation cotton layer 105, make gas temperature constant of liquid in liquid thermostatic bath 115 and air channel 119 and work chamber 104, the isothermal liquid in liquid thermostatic bath 115 is by the gas in sheet metal 120 heating air ducts 119; Because sheet metal 120 is whole sidewalls in air channel 119, the gas in whole air channel 119 is heated simultaneously, and this has ensured the temperature homogeneity of the interior gas in air channel 119 at initial period;
Blower fan 108 is under the drive of the first drive motor 107, compressible drive is from the gas in air channel 119, and deliver gas to the top of work chamber 104, the top of work chamber 104 is handstand funnel-form, be beneficial to the even diffusion of gas in work chamber 104, gas is from the top down successively through having the deceleration of Metal Ball 112 and deceleration and the water conservancy diversion of diffusion and upper micropore metal plate of material 106 and lower micropore metal plate of material 101 of spherical microcellular structure, then concentrate and enter air channel 119 through the funnel structure of work chamber 104 bottoms, simultaneously in the time entering air channel 119, humidifier 121 and dehumidifier 122 that air will be positioned at 119 bottoms, air channel carry out the adjusting of temperature and humidity, then be back to air channel 119 from bottom to top, again with liquid thermostatic bath 115 in liquid carry out heat interchange, and then complete whole circulation.
Compared with the structure of the prior device shown in schematic diagram 2, unique point of the present invention is summarized as follows:
(1) current method is used heating element and refrigerator directly to air heat and cooling, the present invention uses temperature stabilization and uniform liquid in liquid thermostatic bath, air is heated and constant temperature, and the air themperature and the fluid temperature that obtain are like this basic identical, and stability is also basic identical; The raising of temperature stability makes the stability of humidity be improved simultaneously;
(2) current method is used general blower fan directly to stir air, the present invention uses blower fan to produce one air-flow, then use spherical micropore metal material ball and micropore metal plate of material, air-flow is slowed down and water conservancy diversion, thereby obtain little, stable and uniform wind speed;
(3) work space upper and lower is designed to funnel-form, and the effect of upper funnel shape is to impel air evenly to spread, and the effect of lower hopper shape is to impel air evenly to reclaim;
(4) dehumidifier and humidifier design are in work space bottom;
(5) air channel is designed to extend to work space top;
(6) this method adopts the design that narrow in air channel, approximately only has 1/10 of current air channel, makes air can carry out more fully heat interchange.
The humiture useful test case by heating liquid and constant temperature of the invention, owing to having adopted liquid in liquid thermostatic bath to heat air and the mode of constant temperature, stability and the homogeneity of the humiture useful test case temperature obtaining, basic identical with stability and the homogeneity of liquid thermostatic bath; In the temperature range of 5 DEG C～50 DEG C, the stability of air themperature and homogeneity, reached ± level of 0.01 DEG C and 0.02 DEG C; In the humidity range of 40%RH～90%RH, the stability of humidity and homogeneity, the level of reached ± 0.2%RH and 0.3%RH.Owing to having adopted spherical micropore metal material ball and micropore metal plate of material to slow down and water conservancy diversion to air-flow, obtain the wind speed that is less than 0.2m/s.
Claims (8)
1. the temperature/humidity verification box by heating liquid and constant temperature, it comprises temperature/humidity verification box casing (109) and is filled in the heat-preservation cotton layer (105) on temperature/humidity verification box casing (109) madial wall, it is characterized in that, it also comprises the liquid constant temperature device that is positioned at temperature/humidity verification box casing (109), air channel (119) and work chamber (104), isothermal liquid in described liquid constant temperature device carries out heat interchange through the sheet metal (120) being positioned between liquid constant temperature device and air channel (119) with the air in air channel (119), described air channel (119) is the slype being made up of sheet metal (120) and heat-preservation cotton layer (105), the two ends that the two ends in air channel (119) connect respectively work chamber (104) are communicated with, between work chamber (104) and air channel (119), be also provided with the blower fan (108) for driving gas circulation.
2. the temperature/humidity verification box by heating liquid and constant temperature as claimed in claim 1, it is characterized in that, described work chamber (104) bottom is provided with humidifier (121) and the dehumidifier (122) for adjustments of gas temperature and humidity with bottom, air channel (119) connectivity part.
3. the temperature/humidity verification box by heating liquid and constant temperature as claimed in claim 1, it is characterized in that, the periphery of described blower fan (108) is heat-preservation cotton layer (105), and described blower fan (108) first drive motor (107) outer with being fixed on temperature/humidity verification box casing (109) is in transmission connection.
4. the temperature/humidity verification box by heating liquid and constant temperature as claimed in claim 1, it is characterized in that, described liquid constant temperature device comprises liquid thermostatic bath (115) and is positioned at the liquid thermostatic bath stirrer (118) of liquid thermostatic bath (115), described liquid thermostatic bath stirrer (118)) and be fixed on the second drive motor (114) outside temperature/humidity verification box casing (109), the upper portion side wall of described liquid thermostatic bath (115) is provided with spout hole (117) and the fluid sealant (116) for the interior liquid of seal fluid calibration cell (115).
5. the temperature/humidity verification box by heating liquid and constant temperature as claimed in claim 1, it is characterized in that, the upper end in described air channel (119) is communicated with the air intake opening (111) of blower fan (108), and the gas outlet (110) of described blower fan (108) is communicated with by circular pipe with the Metal Ball with spherical microcellular structure (112) that is positioned at work chamber (104).
6. the temperature/humidity verification box by heating liquid and constant temperature as claimed in claim 1, it is characterized in that, the junction of the upper end of described sheet metal (120) and temperature/humidity verification box casing (109) inwall is provided with for the interior liquid sealant of seal fluid calibration cell (115) (113).
7. the temperature/humidity verification box by heating liquid and constant temperature as described in claim 1 or 5, it is characterized in that, the top of described work chamber (104) is handstand funnel structure, the bottom of work chamber (104) is funnel structure, the described Metal Ball (112) with spherical microcellular structure is positioned at the handstand funnel structure top of work chamber (104), has the Metal Ball (112) of spherical microcellular structure and the connectivity part of circular pipe and is provided with the most advanced and sophisticated bellmouth that points to Metal Ball (112) centre of sphere with spherical microcellular structure; Near being fixed with upper micropore metal plate of material (106) in the work chamber (104) having under the Metal Ball (112) of spherical microcellular structure; Described work chamber (104) is interior near being fixed with lower micropore metal plate of material (101) directly over the funnel structure of bottom.
8. the temperature/humidity verification box by heating liquid and constant temperature as claimed in claim 7, it is characterized in that, described upper micropore metal plate of material (106) and lower micropore metal plate of material (101) are all fixedly connected on the madial wall of work chamber (104) by gib screw (102) by coupled corner bracket (103).
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| CN107873568A (en) * | 2017-11-20 | 2018-04-06 | 乾元浩生物股份有限公司 | A kind of tunnel type hatching case humidification system |
| CN110090670A (en) * | 2019-06-05 | 2019-08-06 | 江苏拓米洛环境试验设备有限公司 | Environmental test chamber with top air draught type air channel structure |
| CN113739289A (en) * | 2020-05-30 | 2021-12-03 | 淮安金泽机电科技有限公司 | Industrial refrigerating device with tubular heating |
| CN113867454A (en) * | 2021-09-26 | 2021-12-31 | 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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