CN115903966B - Portable large-cavity body temperature and humidity generator and application method thereof - Google Patents
Portable large-cavity body temperature and humidity generator and application method thereof Download PDFInfo
- Publication number
- CN115903966B CN115903966B CN202211357102.XA CN202211357102A CN115903966B CN 115903966 B CN115903966 B CN 115903966B CN 202211357102 A CN202211357102 A CN 202211357102A CN 115903966 B CN115903966 B CN 115903966B
- Authority
- CN
- China
- Prior art keywords
- cavity
- temperature
- humidity
- chamber
- heating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 230000036760 body temperature Effects 0.000 title claims abstract description 23
- 238000001035 drying Methods 0.000 claims abstract description 56
- 238000012544 monitoring process Methods 0.000 claims abstract description 23
- 238000012360 testing method Methods 0.000 claims description 81
- 238000010438 heat treatment Methods 0.000 claims description 74
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 71
- 238000001816 cooling Methods 0.000 claims description 60
- 239000002184 metal Substances 0.000 claims description 11
- 230000008569 process Effects 0.000 claims description 9
- 238000005192 partition Methods 0.000 claims description 8
- 238000007791 dehumidification Methods 0.000 claims description 6
- 239000003822 epoxy resin Substances 0.000 claims description 5
- 229920000647 polyepoxide Polymers 0.000 claims description 5
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 claims description 3
- 230000008859 change Effects 0.000 claims description 3
- 230000001419 dependent effect Effects 0.000 claims description 3
- 239000006261 foam material Substances 0.000 claims description 3
- 238000012423 maintenance Methods 0.000 claims description 3
- 230000009467 reduction Effects 0.000 claims description 3
- 230000000630 rising effect Effects 0.000 claims description 3
- 239000000741 silica gel Substances 0.000 claims description 3
- 229910002027 silica gel Inorganic materials 0.000 claims description 3
- 239000007921 spray Substances 0.000 claims description 3
- 238000006467 substitution reaction Methods 0.000 claims description 3
- 238000012546 transfer Methods 0.000 claims description 3
- 239000002274 desiccant Substances 0.000 abstract description 7
- 238000005259 measurement Methods 0.000 abstract description 4
- 239000002699 waste material Substances 0.000 abstract description 4
- 230000001276 controlling effect Effects 0.000 description 7
- 239000004065 semiconductor Substances 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000004321 preservation Methods 0.000 description 2
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002457 bidirectional effect Effects 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000007363 regulatory process Effects 0.000 description 1
Classifications
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Landscapes
- Testing Resistance To Weather, Investigating Materials By Mechanical Methods (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a portable large-cavity body temperature and humidity generator and a use method thereof, wherein the generator comprises the following components: the device comprises a cavity, a drying unit, a humidifying unit, a temperature and humidity monitoring control unit and a temperature and humidity sensor. The portable large-cavity body temperature and humidity generator disclosed by the invention can be used for rapidly drying wet air by dehumidifying the drying tank, the drying tank can be repeatedly used for multiple times, and complicated operations of waste and replacement of a drying agent are avoided. The device provided by the invention greatly improves the time for the portable large-cavity body temperature and humidity generator to reach stability, and greatly perfects the technical means of on-site measurement of the hygrothermograph.
Description
Technical Field
The invention belongs to the field of measurement systems for measuring physical quantities, and particularly relates to a portable large-cavity body temperature and humidity generator and a use method thereof.
Background
According to the requirements of the JJF 165-2017 (digital hygrothermograph calibration Specification) and other regulations, various hygrothermographs need to be regularly metered and detected, so that a stable and controllable temperature and humidity detecting environment is required, and a temperature and humidity generator is main equipment for metering and detecting the hygrothermographs in a laboratory.
At present, the technology of a standard temperature and humidity generator for laboratories at home and abroad is mature, and a constant and uniform temperature and humidity field is generated by a temperature and humidity standard box for each metering mechanism laboratory mainly through a double-temperature method and a temperature and humidity regulating method. In recent years, the requirements of field portable temperature and humidity generators are rapidly increased, domestic researchers develop various portable temperature and humidity control boxes by adopting different principles and methods, for example, a temperature and humidity independent control mode, a water circulation mode, a high-efficiency gas-liquid heat exchange mode, a multi-cavity internal permeation mode of a three-way air distribution system of an electromagnetic valve and the like, but the test chamber body of the temperature and humidity generator is smaller and cannot meet the actual requirements, so that the portable temperature generator with a large cavity is required to be developed.
Disclosure of Invention
In view of the above, the portable large-cavity body temperature and humidity generator disclosed by the invention can be used for rapidly drying wet air by dehumidifying a drying tank before use, the drying tank can be repeatedly used for multiple times, the waste and the complicated replacement operation of a drying agent are avoided, all air in a cavity is directly extracted by the generator to zero the initial relative humidity of the cavity, then the humidity control can be rapidly realized by calculating the humidifying time, and the temperature control adopts the double regulation measures of air circulation and an annular water pipe, so that the rapid realization of the temperature control is facilitated.
In order to achieve the purpose, the first aspect of the invention provides a portable large-cavity body temperature and humidity generator, which comprises a cavity, a drying unit, a humidifying unit, a temperature and humidity monitoring control unit and a temperature and humidity sensor;
The cavity comprises a testing chamber and a circulating chamber which are positioned in the cavity, wherein the testing chamber and the cavity share a top panel, and a space is reserved between the side surface and the bottom panel of the testing chamber and between the side surface and the bottom panel of the cavity respectively;
The humidifying unit comprises a convection component, a heating component and a moisture generating component, wherein the convection component is arranged at the position of an opening of a panel at the bottom of the test chamber, the heating component is arranged at the bottom of the convection component, the moisture generating component is arranged in the circulation chamber, and the generated moisture vertically acts on the convection component;
The temperature and humidity monitoring control unit is installed on the cavity panel, and the temperature and humidity sensor is installed inside the test chamber.
Preferably, the cavity is divided into an inner layer and an outer layer, the inner layer is an epoxy resin layer, the outer layer is an insulating foam material layer, a transparent observation hole is formed in the part, shared by the top panel of the cavity and the test chamber, of the cavity, a first fan is arranged in the part, shared by the top panel of the cavity and the circulation chamber, of the cavity, and the first fan is inwards in wind direction and perpendicular to the circulation chamber.
Preferably, the side face panel of the test chamber is provided with through holes, the bottom panel is uniformly provided with sample placement columns arranged in an array manner, and the middle of the bottom panel is provided with holes.
Preferably, the drying unit comprises a drying tank, a gas pipeline, a multi-way electromagnetic valve, a first motor and a two-way electromagnetic valve;
The drying tank is connected with the first interface of the multi-way electromagnetic valve and the first interface of the two-way electromagnetic valve through gas pipelines respectively;
The second interface of the multi-power-on valve is connected with the first motor through a gas pipeline, and the third interface is directly connected with the gas pipeline and extends the gas pipeline to the outer side of the cavity;
The first motor is connected with the testing chamber through a gas pipeline, and the gas pipeline extends into the testing chamber;
and a temperature and humidity sensor is arranged in the two-way electromagnetic valve, and a second interface of the two-way electromagnetic valve extends into the circulating chamber through a gas circuit pipeline.
The drying tank is of a U-shaped structure, a U-shaped shell is arranged on the outer side of the drying tank, metal grid partitions are arranged at two ends of the inner portion of the U-shaped shell, the metal grid partitions divide the inner portion of the U-shaped shell into a first cavity, a third cavity and a second cavity, the first cavity and the third cavity are located in the middle of the first cavity, an electromagnetic valve, a gas flow sensor, a humidity sensor and a second fan are sequentially arranged in the first cavity and the third cavity, the electromagnetic valve is arranged at an air inlet and an air outlet of the first cavity and the air outlet of the third cavity, the gas flow sensor and the humidity sensor are arranged on pipelines connected with the electromagnetic valve in the shell, the second fan is arranged between the gas flow sensor and the metal grid partitions, and the second cavity is a drying chamber which is U-shaped and comprises a spiral heating wire fixedly arranged along the central axis of the second cavity, silica gel filled between the heating wire and the second cavity shell, and a temperature sensor located in the middle of the second cavity.
The convection assembly comprises a flow fan arranged at the position of an opening at the bottom of the test chamber and a corrugated fin arranged below the flow fan, the flow fan is oriented to the inside of the test chamber, the heating assembly is a first heating and cooling sheet arranged below the corrugated fin, the bottom of the first cooling sheet is directly exposed in air outside a cavity, the moisture generating assembly comprises a water adding tank arranged in a circulation chamber, a second motor connected with the water adding tank, a water valve connected with the second motor, an ultrasonic humidifier connected with the water valve, and a water vapor spray head of the ultrasonic humidifier is vertically opposite to the corrugated fin.
Preferably, the bottom of the water adding tank is provided with a second heating and cooling sheet, a temperature sensor is arranged in the second heating and cooling sheet, the second heating and cooling sheet is clung to the base of the water adding tank, the bottom of the second heating and cooling sheet is directly exposed in the air outside the cavity, the water adding tank is also connected with a third motor, the third motor is connected with a water pipe, the water pipe is annularly laid on the inner surface of the bottom surface of the test chamber, and a metal heat transfer sheet is arranged on the surface of the water pipe.
Preferably, the temperature and humidity sensor is arranged in the middle of 4 side edges in the test chamber.
A second aspect of the present invention provides a method of using a portable large cavity body temperature and humidity generator as described above, the method comprising:
S1, starting a flow fan to dehumidify a drying tank;
S2, controlling a multi-way electromagnetic valve, starting a first motor to enable gas to flow from the cavity to the outside of the cavity, and calculating the internal volume V of the cavity by adopting an equal-product substitution method after the gas in the cavity is completely pumped;
s3, setting the temperature T and the relative humidity RH which are required to be reached by the test chamber on the temperature and humidity monitoring control unit;
S4, controlling the multi-way electromagnetic valve to enable gas to flow into the circulating chamber after passing through the drying tank from the outside of the cavity, so that the air in the testing chamber is in a completely dried normal air pressure state;
S5, the temperature and humidity monitoring control unit controls the moisture generating assembly to humidify and regulate the test chamber;
s6, the temperature and humidity monitoring control unit judges and adjusts the temperature in the test chamber in real time;
and S7, the temperature and humidity monitoring control unit monitors the temperature and the relative humidity of the test chamber in real time and performs regulation and control maintenance.
Preferably, in the step S1, the dehumidifying process is performed on the drying tank as follows:
Simultaneously utilizing humidity sensors of a first chamber and a third chamber in the drying tank to monitor the air humidity in the drying tank in real time, closing the multi-solenoid valve and the bi-directional solenoid valve when the relative humidity change of the humidity sensors of the first chamber and the third chamber is less than 5%, then closing the first heating and cooling sheet, and ending the dehumidification process;
preferably, the humidification adjustment process in S5 is as follows:
Firstly, a calculation formula for calculating the opening time t on,ton of the water valve according to the set relative humidity RH is as follows:
Wherein P T represents the water saturation vapor pressure at the temperature T, the specific value is obtained by checking the water saturation vapor pressure table, the unit is MPa, V represents the internal volume of the cavity, the unit is m 3, RH represents the set relative humidity, R represents the general gas constant, the unit is MPa.m 3/(kmol.K), T represents the set temperature, the unit is K, ρ T represents the density of water at the temperature T, the unit is kg/m 3, and the value is obtained by checking the water density table;
Then, the second motor and the high-frequency ultrasonic humidifier are started, and then the water valve is closed after t on time is elapsed;
preferably, the method for determining and adjusting the temperature in the test chamber in real time in S6 includes performing a temperature increasing operation if the temperature T set in S3 is greater than the initial temperature T 0 of the temperature and humidity sensor, and performing a temperature decreasing operation if the temperature T is not greater than the initial temperature T 0 of the temperature and humidity sensor;
starting a third motor, starting and setting the tops of a first heating and cooling sheet and a second heating and cooling sheet to be in a heating state, setting the temperatures of the tops of the first heating and cooling sheet and the second heating and cooling sheet to be (T 0 +80) DEG C before the time of T 1 on the assumption that the heating time is T 1, and then linearly reducing the temperatures to be T and keeping the temperatures at T all the time, wherein the heating time T 1 is dependent on the difference value between the set temperature T and the initial temperature T 0 of a temperature and humidity sensor, and the linear reduction time is 1/4 of T 1;
The cooling operation is that a third motor is started, the tops of the first heating and cooling piece and the second heating and cooling piece are set to be in a cooling state, the cooling duration is T 2, the temperatures of the tops of the first heating and cooling piece and the second heating and cooling piece before the time of T 2 are set to be (T 0 -70) DEG C, then the temperatures are linearly increased to the temperature T and then kept at the T all the time, wherein the cooling duration T 2 depends on the difference value between the set temperature T and the initial temperature T 0 of the temperature and humidity sensor, and the linear rising time is 1/3 of T 2.
The portable large-cavity body temperature and humidity generator has the advantages that the portable large-cavity body temperature and humidity generator can quickly dry wet air by dehumidifying the drying tank, the drying tank can be repeatedly used for a plurality of times, waste and complicated replacement operation of a drying agent are avoided, all air in the cavity is directly extracted by the generator to zero the initial relative humidity of the cavity, then the humidity control can be quickly realized by calculating the humidifying time, and the temperature control adopts double regulation measures of air circulation and an annular water pipe, so that the temperature control can be quickly realized. The device provided by the application greatly improves the time for the portable large-cavity body temperature and humidity generator to reach stability, and greatly perfects the technical means of on-site measurement of the hygrothermograph.
Drawings
FIG. 1 is a schematic diagram of a portable large-cavity body temperature and humidity generator according to an embodiment of the present application;
FIG. 2 is a schematic diagram of a drying tank according to an embodiment of the present application;
In the figure, the temperature and humidity sensor is characterized by comprising a cavity 1, a circulating chamber 3, a testing chamber 4, a side face plate 5, a temperature and humidity sensor 6, a flow fan 7, a sample placing column 8, a water pipe 9, a first motor 10, a multi-solenoid valve 11, a drying tank 12, a two-way solenoid valve 13, a first heating and cooling plate 14, a corrugated fin 15, an ultrasonic humidifier 16, a second motor 17, a water adding tank 18, a second heating and cooling plate 19, a water valve 20, a third motor 21, a temperature and humidity monitoring control unit 22, a first fan 23, a transparent observation hole 111, a solenoid valve 112, a U-shaped shell 113, a heating wire 114, a drying agent silica gel 115, a temperature sensor 116, a drying chamber 117, a second fan 118, a gas flow sensor 119 and a humidity sensor.
Detailed Description
Those of ordinary skill in the art will recognize that the embodiments described herein are for the purpose of aiding the reader in understanding the principles of the present invention and should be understood that the scope of the invention is not limited to such specific statements and embodiments. Those of ordinary skill in the art can make various other specific modifications and combinations from the teachings of the present disclosure without departing from the spirit thereof, and such modifications and combinations remain within the scope of the present disclosure.
According to the portable large-cavity body temperature and humidity generator disclosed by the application, the drying tank is subjected to dehumidification treatment, so that the wet air can be quickly dried, the drying tank can be repeatedly used for a plurality of times, and the waste and the complicated replacement operation of a drying agent are avoided; the generator of the application firstly extracts all air in the cavity to directly zero the initial relative humidity of the cavity, then can quickly realize humidity control by calculating the humidification time, and the temperature control adopts double regulation measures of air circulation and an annular water pipe, thereby being beneficial to quickly realizing temperature control. The device provided by the application greatly improves the time for the portable large-cavity body temperature and humidity generator to reach stability, and greatly perfects the technical means of on-site measurement of the hygrothermograph.
The optimization method of the portable large-cavity humidity generator is described in detail below with reference to fig. 1-2 and specific embodiments.
Examples
The portable large-cavity body temperature and humidity generator shown in fig. 1 comprises a cavity 1, a drying unit, a humidifying unit, a temperature and humidity monitoring and controlling unit 21 and a temperature and humidity sensor 5, and the following components are respectively described for the sake of clear understanding of the application:
(1) The cavity 1 comprises a test chamber 3 and a circulating chamber 2 which are positioned in the cavity 1, the test chamber 3 and the cavity 1 share a top panel, a certain distance is reserved between a side panel 4 and a bottom panel of the test chamber 3 and the side panel and the bottom panel of the cavity 1 respectively, as the large cavity characteristic of the temperature and humidity generator is realized to the maximum extent, the distance between the left side and the right side of the test chamber 3 and the inner side panel of the cavity 1 is set to be 40mm, the distance between the bottom panel of the test chamber 3 and the inner side of the bottom of the cavity 1 is set to be 80mm, and the space between the test chamber 3 and the inner surface of the cavity 1 forms the circulating chamber 2;
The cavity 1 is divided into an inner layer and an outer layer, the inner layer is an epoxy resin layer, the outer layer is an insulating foam material layer, the heat preservation and moisture preservation effects can be better achieved through the two-layer design, a transparent observation hole 23 is formed in the part, shared by the top panel of the cavity 1 and the test chamber 3, of the cavity 3, real-time monitoring of conditions in the test chamber 3 is facilitated, a first fan 22 is arranged in the part, shared by the top panel of the cavity 1 and the circulation chamber 2, of the first fan 22, and the first fan is inwards and perpendicular to the circulation chamber 2, so that air flow in the cavity 1 is quickened.
In the embodiment, the panel of the test chamber 3 is made of epoxy resin material, a plurality of through holes are formed in the side panel 4 of the test chamber 3 for keeping air flow between the test chamber and the circulation chamber 2, and the bottom panel of the test chamber is uniformly provided with epoxy resin cylindrical sample placing columns 7 which are arranged in an array manner, so that the sample to be tested is conveniently placed, and a round hole for installing a convection unit is formed in the middle of the bottom of the test chamber for accelerating air circulation from the bottom direction of the test chamber 3.
(2) The drying unit is arranged in the circulating chamber 2, and the drying unit communicates the testing chamber 3, the outside of the cavity body 1 and the circulating chamber 2 through a gas path pipeline and a valve, as shown in fig. 1, and comprises a drying tank 11, a gas pipeline, a multi-way electromagnetic valve 10, a first motor 9 and a bidirectional electromagnetic valve 12. The drying tank 11 is connected with a first interface of the multi-way electromagnetic valve 10 and a first interface of the two-way electromagnetic valve 12 through gas pipelines respectively, a second interface of the multi-way electromagnetic valve 10 is connected with the first motor 9 through a gas pipeline, the third interface is directly connected with the gas pipeline and extends the gas pipeline to the outer side of the cavity body 1, the first motor 9 is connected with the testing chamber 3 through the gas pipeline and extends the gas pipeline to the testing chamber 3, a temperature and humidity sensor is arranged in the two-way electromagnetic valve 12, and the second interface of the two-way electromagnetic valve 12 extends in the circulating chamber 2 through the gas pipeline.
Through the connection of the gas pipelines, the multi-way control electromagnetic valve 10 can realize multi-directional flow of the gas path in the cavity 1, wherein the multi-way control electromagnetic valve comprises the steps of flowing gas from the test chamber 3 to the outside of the cavity 1, flowing gas from the test chamber 3 to the circulating chamber 2 and flowing gas from the outside of the cavity 1 to the circulating chamber 2.
As shown in fig. 2, as a preferred embodiment, the drying tank 11 has a U-shaped structure, and the outside thereof is a U-shaped housing 112, and the U-shaped housing 112 is made of transparent acrylic material resistant to heat at 200 ℃. The inside of the U-shaped shell 112 is divided into a first cavity and a third cavity at two ends and a second cavity in the middle of the first cavity and the third cavity by the metal grid partition, an electromagnetic valve 111, a gas flow sensor 118, a humidity sensor 119 and a second fan 117 are sequentially arranged in the first cavity and the third cavity, the electromagnetic valve 111 is arranged at the air inlet and the air outlet of the first cavity and the air outlet of the third cavity and used for controlling the flow of gas, the gas flow sensor 118 and the humidity sensor 119 are arranged on pipelines connected with the electromagnetic valve in the shell and used for detecting the flow of gas and the relative humidity of the gas passing through a drying tank, the second fan 117 is arranged between the gas flow sensor 118 and the metal grid partition and used for timely taking away the volatilized moisture in the drying agent in the drying tank in the dehumidification process, and the second cavity is a U-shaped drying chamber 116 which comprises a spiral heating wire 113 fixedly arranged along the central axis of the second cavity, a drying agent 114 filled between the heating wire 113 and the second cavity and a temperature sensor 115 arranged in the middle of the second cavity.
(3) A humidifying unit is also installed in the circulation chamber 3, and includes a convection assembly, a heating assembly, and a moisture generating assembly.
As an embodiment, the convection assembly comprises a flow fan 6 installed at the position of an opening at the bottom of the test chamber 3 and a corrugated fin 14 installed below the flow fan, wherein the flow fan 6 is windward to the inside of the test chamber 3, the purpose of the convection assembly is to accelerate the air flow in the cavity, and quickly send the water vapor generated by the moisture generating assembly into the test chamber 3, so that the test chamber 3 can quickly and uniformly reach the humidity required for detection;
As an example, the heating component is a first temperature raising and reducing plate 13 installed below the corrugated fins, and the bottom of the first temperature reducing plate 13 is directly exposed to the air outside the cavity, which is used for heating the corrugated fins 14 and further heating the water vapor through the corrugated fins 14, and those skilled in the art will understand that other components with temperature raising and reducing control are equivalent substitutes for the first temperature raising and reducing plate 13.
The moisture generating assembly comprises a water adding tank 17 arranged in a circulating chamber, a second motor 16 connected with the water adding tank 17, a water valve 19 connected with the second motor 16, and an ultrasonic humidifier 15 connected with the water valve 19, wherein a water vapor spray head of the ultrasonic humidifier 15 is vertically opposite to the corrugated fins 14, and the corrugated fins 14 timely convey water vapor into the test moisture 3 through the flow fan 6.
As an embodiment, a second heating and cooling plate 18 is arranged at the bottom of the water adding tank 17, a temperature sensor is installed in the water adding tank, the second heating and cooling plate 18 is closely attached to the base of the water adding tank 17, the bottom of the second heating and cooling plate is directly exposed in the air outside the cavity 1, and the second heating and cooling plate 18 can regulate and control the temperature of water in the water adding tank 17;
As the best embodiment, the application also connects the third motor 20 on the water adding pool 17, the third motor 20 connects the water pipe 8, the water pipe 8 is laid on the inner surface of the bottom surface of the test chamber 3 annularly, the heating element in the test chamber 3 is further increased by setting the water pipe 8, the hot water circulation in the water pipe 8 and the water vapor with certain temperature blown by the air blower 6 are laid annularly, the heating or cooling in the test chamber 3 can be realized evenly, more preferably, the metal heat transfer sheet is installed on the surface of the water pipe 8, the heating effect is accelerated.
The first temperature-raising and lowering sheet 13 and the second temperature-raising and lowering sheet 18 are stacked semiconductor temperature control elements, and the upper part is raised when the current passes through the stacked semiconductor temperature control elements in the forward direction and lowered when the current passes through the stacked semiconductor temperature control elements in the reverse direction.
(4) The temperature and humidity monitoring control unit 21 is installed on the cavity panel and is connected to the temperature and humidity sensor 5, the first motor 9, the multi-way electromagnetic valve 10, the drying tank 11, the two-way electromagnetic valve 12, the first heating and cooling sheet 13, the flow fan 6, the ultrasonic humidifier 15, the second motor 16, the water adding tank 17, the water valve 19, the third motor 20 and the first fan 22 in the test chamber 3 through aviation plugs respectively, and the temperature and humidity monitoring control unit (21) also provides power for the parts and controls the working state.
(5) The temperature and humidity sensor is arranged in the test chamber and in the middle of 4 side edges in the test chamber.
The use method of the portable large-cavity body temperature and humidity generator is as follows:
S1, starting a flow fan to dehumidify a drying tank;
The process of dehumidification treatment comprises opening a first motor, controlling a multi-way electromagnetic valve and a bi-directional electromagnetic valve to enable gas to flow from a test chamber to a circulation chamber after passing through a drying tank, monitoring air humidity in the drying tank in real time by utilizing humidity sensors of a first chamber and a third chamber in the drying tank, closing the multi-way electromagnetic valve and the bi-directional electromagnetic valve when the relative humidity change of the humidity sensors of the first chamber and the third chamber is less than 5%, then closing a first heating and cooling sheet, and ending the dehumidification process;
S2, controlling a multi-way electromagnetic valve, starting a first motor to enable gas to flow from the cavity to the outside of the cavity, and calculating the internal volume V of the cavity by adopting an equal-product substitution method after the gas in the cavity is completely pumped;
s3, setting the temperature T and the relative humidity RH which are required to be reached by the test chamber on the temperature and humidity monitoring control unit;
S4, controlling the multi-way electromagnetic valve to enable gas to flow into the circulating chamber after passing through the drying tank from the outside of the cavity, so that the air in the testing chamber is in a completely dried normal air pressure state;
S5, the temperature and humidity monitoring control unit controls the moisture generating assembly to humidify and regulate the test chamber;
The humidifying and regulating process is that firstly, the calculation formula for calculating the opening time t on,ton of the water valve according to the set relative humidity RH is as follows:
wherein P T represents the water saturation vapor pressure at the temperature T, the specific value is obtained by checking a water saturation vapor pressure meter, the unit is MPa, V represents the internal volume of a cavity, the unit is m 3, RH represents the set relative humidity, R represents the general gas constant, the unit is MPa.m 3/(kmol.K), T represents the set temperature, the unit is K, rho T represents the density of water at the temperature T, the unit is kg/m 3, the water density meter is obtained, then, a second motor and a high-frequency ultrasonic humidifier are started, and then a water valve is opened for T on time and then closed;
S6, the temperature and humidity monitoring control unit judges and adjusts the temperature in the test chamber in real time, wherein the real-time judging and adjusting method comprises the following steps of heating if the temperature T set in the S3 is greater than the initial temperature T 0 of the temperature and humidity sensor, and cooling if the temperature T is not greater than the initial temperature T 0 of the temperature and humidity sensor;
Starting a third motor, starting and setting the tops of the first heating and cooling sheet and the second heating and cooling sheet to be in a heating state, setting the temperatures of the tops of the first heating and cooling sheet and the second heating and cooling sheet to be (T 0 +80) DEG C before the time of T 1 on the assumption that the heating time is T 1, and then linearly reducing the temperatures to be T and keeping the temperatures at T all the time, wherein the heating time T 1 is dependent on the difference value between the set temperature T and the initial temperature T 0 of the temperature and humidity sensor, and the linear reduction time is 1/4 of T 1;
The cooling operation is to start the third motor, start and set the tops of the first heating and cooling sheet and the second heating and cooling sheet to be in a cooling state, assume that the cooling time period is T 2, set the temperatures of the tops of the first heating and cooling sheet and the second heating and cooling sheet before the time T 2 to be (T 0 -70) DEG C, and then linearly rise to the temperature T and keep the temperature T at the time T, wherein the size of the cooling time period T 2 depends on the difference value between the set temperature T and the initial temperature T 0 of the temperature and humidity sensor, and the linear rising time is 1/3 of T 2.
And S7, the temperature and humidity monitoring control unit monitors the temperature and the relative humidity of the test chamber in real time and performs regulation and control maintenance.
Claims (9)
1. The portable large-cavity body temperature and humidity generator comprises a cavity, a drying unit, a humidifying unit, a temperature and humidity monitoring control unit and a temperature and humidity sensor, wherein the cavity comprises a test chamber and a circulating chamber which are arranged in the cavity, a top panel is shared by the test chamber and the cavity, spaces are reserved between the side surface of the test chamber and the bottom panel, the side surface of the test chamber and the bottom panel are respectively reserved between the side surface of the cavity and the bottom panel, the spaces between the test chamber and the cavity form the circulating chamber, the test chamber and the circulating chamber are communicated, the drying unit and the humidifying unit are both arranged in the circulating chamber, the drying unit is communicated with the test chamber, the outside of the cavity and the circulating chamber through an air channel pipeline and a valve, the humidifying unit comprises a convection assembly, a heating assembly and a moisture generating assembly, the convection assembly is arranged at the position of an opening of the bottom panel of the test chamber, the heating assembly is arranged at the bottom of the convection assembly, the moisture generating assembly is arranged in the circulating chamber, and moisture generated by the moisture vertically acts on the convection assembly, the temperature and humidity monitoring control unit is arranged on the panel, and the temperature and humidity sensor is arranged in the cavity, and the test chamber, and the inside the test chamber.
S1, starting a flow fan to dehumidify a drying tank in the drying unit;
S2, controlling a multi-way electromagnetic valve, starting a first motor to enable gas to flow from the cavity to the outside of the cavity, and calculating the internal volume V of the cavity by adopting an equal-product substitution method after the gas in the cavity is completely pumped;
s3, setting the temperature T and the relative humidity RH which are required to be reached by the test chamber on the temperature and humidity monitoring control unit;
S4, controlling the multi-way electromagnetic valve to enable gas to flow into the circulating chamber after passing through the drying tank from the outside of the cavity, so that the air in the testing chamber is in a completely dried normal air pressure state;
s5, the temperature and humidity monitoring control unit controls the moisture generating assembly to carry out humidification adjustment on the test chamber, and the humidification adjustment process is as follows:
Firstly, a calculation formula for calculating the opening time t on,ton of the water valve according to the set relative humidity RH is as follows:
Wherein P T represents the water saturation vapor pressure at the temperature T, the specific value is obtained by checking the water saturation vapor pressure table, the unit is MPa, V represents the internal volume of the cavity, the unit is m 3, RH represents the set relative humidity, R represents the general gas constant, the unit is MPa.m 3/(kmol.K), T represents the set temperature, the unit is K, ρ T represents the density of water at the temperature T, the unit is kg/m 3, and the value is obtained by checking the water density table;
Then the second motor and the high-frequency ultrasonic humidifier are started, and then the water valve is closed after t on time is started;
s6, the temperature and humidity monitoring control unit judges and adjusts the temperature in the test chamber in real time;
and S7, the temperature and humidity monitoring control unit monitors the temperature and the relative humidity of the test chamber in real time and performs regulation and control maintenance.
2. The method for using the portable large-cavity body temperature and humidity generator according to claim 1, wherein the cavity is divided into an inner layer and an outer layer, the inner layer is an epoxy resin layer, the outer layer is an insulating foam material layer, a transparent observation hole is formed in a part, shared by a cavity top panel and the test chamber, of the cavity, a first fan is arranged in a part, shared by the cavity top panel and the circulation chamber, of the cavity, and the first fan is inwards and perpendicular to the circulation chamber.
3. The method of claim 1, wherein the side panels of the test chamber are provided with through holes, the bottom panel is provided with sample placement columns arranged in an array, and the middle of the bottom panel is provided with holes.
4. The method for using the portable large-cavity body temperature and humidity generator according to claim 1, wherein the drying unit comprises a drying tank, a gas pipeline, a multi-way electromagnetic valve, a first motor and a two-way electromagnetic valve;
The drying tank is connected with the first interface of the multi-way electromagnetic valve and the first interface of the two-way electromagnetic valve through gas pipelines respectively;
The second interface of the multi-power-on valve is connected with the first motor through a gas pipeline, and the third interface is directly connected with the gas pipeline and extends the gas pipeline to the outer side of the cavity;
the first motor is connected with the testing chamber through a gas pipeline, and the gas pipeline extends into the testing chamber;
and a temperature and humidity sensor is arranged in the two-way electromagnetic valve, and a second interface of the two-way electromagnetic valve extends into the circulating chamber through a gas circuit pipeline.
5. The method for using the portable large-cavity body temperature and humidity generator according to claim 4, wherein the drying tank is of a U-shaped structure, a U-shaped shell is arranged on the outer side of the drying tank, metal grid partitions are arranged at two ends of the inner portion of the U-shaped shell, the metal grid partitions divide the inner portion of the U-shaped shell into a first cavity, a third cavity and a second cavity, the first cavity and the third cavity are respectively internally provided with an electromagnetic valve, a gas flow sensor, a humidity sensor and a second fan in sequence, the electromagnetic valves are arranged at gas inlets and gas outlets of the first cavity and the third cavity, the gas flow sensor and the humidity sensor are arranged on pipelines connected with the electromagnetic valves in the shell, the second fan is arranged between the gas flow sensor and the metal grid partitions, and the second cavity is a U-shaped drying chamber and comprises a spiral heating wire fixedly arranged along the central axis of the second cavity, silica gel filled between the heating wire and the second cavity shell, and the temperature sensor arranged in the middle of the second cavity.
6. The method for using the portable large-cavity body temperature and humidity generator according to claim 1, wherein the convection assembly comprises a flow fan arranged at the position of an opening at the bottom of a test chamber and a corrugated fin arranged below the flow fan, the wind direction of the flow fan is the inside of the test chamber, the heating assembly is a first heating and cooling fin arranged below the corrugated fin, the bottom of the first cooling fin is directly exposed in air outside the cavity, the humidity generating assembly comprises a water adding tank arranged in a circulation chamber, a second motor connected with the water adding tank, a water valve connected with the second motor, an ultrasonic humidifier connected with the water valve, and a water vapor spray head of the ultrasonic humidifier is vertically opposite to the corrugated fin.
7. The method for using the portable large-cavity body temperature and humidity generator according to claim 6, wherein a second heating and cooling sheet is arranged at the bottom of the water adding tank, a temperature sensor is installed in the water adding tank, the second heating and cooling sheet is closely attached to a base of the water adding tank, the bottom of the second heating and cooling sheet is directly exposed in air outside the cavity, the water adding tank is further connected with a third motor, the third motor is connected with a water pipe, the water pipe is annularly laid on the inner surface of the bottom surface of the test chamber, and a metal heat transfer sheet is installed on the surface of the water pipe.
8. The method of claim 1, wherein the temperature and humidity sensor is installed in the middle of 4 side edges inside the test chamber.
9. The method of using a portable large cavity thermal humidity generator according to any one of claims 1 to 8,
In the step S1, the dehumidifying process is performed on the drying tank as follows:
Simultaneously utilizing humidity sensors of a first chamber and a third chamber in the drying tank to monitor the air humidity in the drying tank in real time, closing the multi-solenoid valve and the bi-directional solenoid valve when the relative humidity change of the humidity sensors of the first chamber and the third chamber is less than 5%, then closing the first heating and cooling sheet, and ending the dehumidification process;
The real-time judging and adjusting method for the temperature in the test chamber in the S6 comprises the following steps of performing heating operation if the temperature T set in the S3 is greater than the initial temperature T 0 of the temperature and humidity sensor, and performing cooling operation if the temperature T is not greater than the initial temperature T 0 of the temperature and humidity sensor;
starting a third motor, starting and setting the tops of a first heating and cooling sheet and a second heating and cooling sheet to be in a heating state, setting the temperatures of the tops of the first heating and cooling sheet and the second heating and cooling sheet to be (T 0 +80) DEG C before the time of T 1 on the assumption that the heating time is T 1, and then linearly reducing the temperatures to be T and keeping the temperatures at T all the time, wherein the heating time T 1 is dependent on the difference value between the set temperature T and the initial temperature T 0 of a temperature and humidity sensor, and the linear reduction time is 1/4 of T 1;
The cooling operation is that a third motor is started, the tops of the first heating and cooling piece and the second heating and cooling piece are set to be in a cooling state, the cooling duration is T 2, the temperatures of the tops of the first heating and cooling piece and the second heating and cooling piece before the time of T 2 are set to be (T 0 -70) DEG C, then the temperatures are linearly increased to the temperature T and then kept at the T all the time, wherein the cooling duration T 2 depends on the difference value between the set temperature T and the initial temperature T 0 of the temperature and humidity sensor, and the linear rising time is 1/3 of T 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211357102.XA CN115903966B (en) | 2022-11-01 | 2022-11-01 | Portable large-cavity body temperature and humidity generator and application method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211357102.XA CN115903966B (en) | 2022-11-01 | 2022-11-01 | Portable large-cavity body temperature and humidity generator and application method thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN115903966A CN115903966A (en) | 2023-04-04 |
| CN115903966B true CN115903966B (en) | 2024-12-31 |
Family
ID=86475487
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211357102.XA Active CN115903966B (en) | 2022-11-01 | 2022-11-01 | Portable large-cavity body temperature and humidity generator and application method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115903966B (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107748585A (en) * | 2017-12-15 | 2018-03-02 | 中环天仪（天津）气象仪器有限公司 | A kind of portable humidity device1 and humidity generation method |
| CN215955012U (en) * | 2021-09-27 | 2022-03-04 | 陕西卓源电气科技有限公司 | Novel maintenance-free moisture absorber for transformer |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2990170B1 (en) * | 1998-08-05 | 1999-12-13 | スガ試験機株式会社 | Humidity control mechanism of environmental test equipment |
| CN106950908A (en) * | 2012-08-28 | 2017-07-14 | 戴尔斯生活有限责任公司 | For improve with can the associated happiness of living environment system, method and object |
| CN107065993A (en) * | 2017-05-02 | 2017-08-18 | 习水县龙洋生态食品开发有限公司 | A kind of Edible mushroom processing bakery |
| CN210426608U (en) * | 2019-09-29 | 2020-04-28 | 辽宁东测检测技术有限公司 | Temperature and humidity calibration box |
| CN110941297A (en) * | 2019-11-26 | 2020-03-31 | 山东省计量科学研究院 | Portable temperature and humidity generator |
| CN112965562A (en) * | 2021-03-24 | 2021-06-15 | 济南长峰致远仪表科技有限公司 | Humidity control structure and control method of temperature and humidity verification box |
| CN216204834U (en) * | 2021-10-02 | 2022-04-05 | 南京瓦科机械设备有限公司 | Lithium battery drying device |
-
2022
- 2022-11-01 CN CN202211357102.XA patent/CN115903966B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107748585A (en) * | 2017-12-15 | 2018-03-02 | 中环天仪（天津）气象仪器有限公司 | A kind of portable humidity device1 and humidity generation method |
| CN215955012U (en) * | 2021-09-27 | 2022-03-04 | 陕西卓源电气科技有限公司 | Novel maintenance-free moisture absorber for transformer |
Also Published As
| Publication number | Publication date |
|---|---|
| CN115903966A (en) | 2023-04-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112234230B (en) | Temperature and humidity control system and method for fuel cell test gas | |
| CN102937464B (en) | Performance detection testing system of mine air returning heat exchanger and using method thereof | |
| CN206064437U (en) | A kind of humidity control device in climate compartment | |
| CN112310441B (en) | A temperature and humidity control system for fuel cell reaction gas | |
| CN103386330A (en) | Variable-volume combined-drawer-type test box controlled by individual blower fan | |
| CN109026120B (en) | A boiling condensation type mine thermal and humid environment simulation experiment platform | |
| CN106000483A (en) | Condensation-controllable split type testing tank | |
| CN108756996A (en) | A kind of mine hot wet environment simulating experiment porch | |
| CN109781783A (en) | A kind of multi-functional moisture synchronism detection experimental bench | |
| CN113899476B (en) | An in-situ environment simulated wet bulb temperature calibration device | |
| CN104932038A (en) | Temperature-humidity-pressure comprehensive generator used for verifying temperature, humidity and pressure sensors | |
| CN113517457A (en) | Gas heating and humidifying system of fuel cell detection platform | |
| CN206840398U (en) | A kind of cement protecting box | |
| CN207478612U (en) | A kind of multifunctional comprehensive environmental chamber detecting system | |
| CN115903966B (en) | Portable large-cavity body temperature and humidity generator and application method thereof | |
| CN203425833U (en) | Test box with high utilization rate in upper feeding and lower discharging mode | |
| CN104132686B (en) | Thermostatic temperature and humidity calibration box heated through liquid | |
| CN203929552U (en) | A kind of one dimension heat and moisture transmission characteristic parameter measurement testing table | |
| CN109176855A (en) | A kind of curing kilns | |
| CN104795967A (en) | Cooling and dehumidifying device and converter applying same | |
| CN204358909U (en) | A kind of temperature and humidity regulation system being applicable to air-conditioner enthalpy difference experiment | |
| CN208771443U (en) | A kind of energy conservation high-low temperature test chamber | |
| CN219178148U (en) | Drying test bed for granular and flaky materials | |
| CN215988867U (en) | Gas heating and humidifying system of fuel cell detection platform | |
| CN112952148B (en) | A fuel cell humidification control device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |