CN110794010B - Formaldehyde adsorption rate detects test device - Google Patents
Formaldehyde adsorption rate detects test device Download PDFInfo
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- CN110794010B CN110794010B CN201911243019.8A CN201911243019A CN110794010B CN 110794010 B CN110794010 B CN 110794010B CN 201911243019 A CN201911243019 A CN 201911243019A CN 110794010 B CN110794010 B CN 110794010B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
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- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A50/00—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE in human health protection, e.g. against extreme weather
- Y02A50/20—Air quality improvement or preservation, e.g. vehicle emission control or emission reduction by using catalytic converters
Abstract
The invention relates to the technical field of test instruments, in particular to a formaldehyde adsorption rate detection test device which comprises a shell, a detection chamber, a liquid supply assembly, an atomization assembly, a gas balance assembly, a temperature control assembly, a gas detection assembly for monitoring and detecting the content of formaldehyde in the detection chamber and an exhaust cooling assembly for removing harmful and polluted gas after the test, wherein the atomization assembly is communicated with the liquid supply assembly, and the gas balance assembly, the temperature control assembly and the exhaust cooling assembly are all arranged on the shell. According to the invention, liquid is sprayed into the detection chamber through the liquid supply assembly and the atomization assembly to maintain the specific air mass concentration in the detection chamber, the temperature control assembly and the gas balance assembly are arranged to provide the specific temperature to be simulated in the detection chamber and maintain the balance of the gas concentration in the detection chamber and the gas detection assembly is arranged to detect the absorption or release amount of formaldehyde volatile organic pollutants, so that higher accuracy and precision can be obtained.
Description
Technical Field
The invention relates to the technical field of test instruments, in particular to a formaldehyde adsorption rate detection test device.
Background
At present, the home decoration material market has a plurality of multifunctional green pollution-free decoration materials, but lacks a unified detection instrument for effectively detecting and adsorbing formaldehyde and benzene volatile organic pollutants in the air. The existing formaldehyde detector is lack of a high-precision formaldehyde detector capable of testing the formaldehyde adsorption effect of experimental materials in a laboratory. The change of the air concentration caused by the walking of the personnel is easy to cause a certain experimental error, the detected experimental data cannot be displayed in real time, and the accuracy of the air quality measurement data can be ensured only by fixed-point sampling. In addition, when the test is directly carried out in the solid sample room, the whole space of the solid sample room is larger, and the consumed materials of the test materials are also more, so that the formaldehyde detector occupies a large space; in the formaldehyde testing process, the data measured in real time cannot be displayed in time, and can only be used for detecting one gas, and the function is single.
Disclosure of Invention
The invention aims to overcome the defects of inaccurate measurement of test data, excessive detection consumables, large occupied space, incapability of displaying test data in real time and single function of a formaldehyde detector in the prior art, and provides a formaldehyde adsorption rate detection test device.
In order to solve the technical problems, the invention adopts the following technical scheme:
the utility model provides a formaldehyde adsorption rate detects test device, including the casing, locate the inside detection chamber and the confession liquid subassembly of casing, be used for regulating and controlling the atomizing subassembly that detects indoor air mass concentration, be used for balancing the gas balance subassembly that detects indoor gas concentration, be used for regulating and controlling the temperature control subassembly that detects indoor temperature, be used for monitoring the gas detection subassembly that detects indoor formaldehyde content and be used for clear away the harmful pollutant gas's after the test exhaust cooling module, atomizing subassembly and confession liquid subassembly intercommunication set up, gas balance subassembly, temperature control subassembly, gas detection subassembly, exhaust cooling module are all installed in the casing.
According to the formaldehyde adsorption rate detection test device, liquid is sprayed into the detection chamber through the liquid supply assembly and the atomization assembly to maintain specific air mass concentration in the detection chamber, the temperature control assembly and the gas balance assembly are arranged to provide specific temperature to be simulated in the detection chamber and to maintain the balance of the concentration of gas in the detection chamber and the gas detection assembly to detect the absorption or release amount of formaldehyde volatile organic pollutants, and the exhaust cooling assembly is arranged to effectively remove harmful pollution gas after test in the detection chamber. The invention can control and adjust the indoor temperature, air pressure and gas concentration, thereby improving the accuracy and precision of measurement of the absorption or release amount of formaldehyde volatile organic pollutants; the device occupies small volume, and can be placed in a laboratory to simulate specific air conditions to test the adsorption performance of the material.
Further, the liquid supply assembly comprises a liquid storage tank, a filtrate device and a liquid supply device which are sequentially connected, a cover body is connected to the top of the liquid storage tank in a sealing mode, the liquid supply device is arranged at the bottom of the shell and is communicated with a liquid storage area, and the liquid storage area is communicated with the atomization assembly. The liquid is loaded in the liquid storage tank, the liquid in the liquid storage tank flows into the liquid feeder after being filtered by the filter, the purity of the atomized test liquid is guaranteed, the filtered atomized test liquid is stored in the liquid storage area, and the atomized device is communicated with the liquid storage area and can take liquid from the liquid storage area.
Further, atomizing subassembly is including orderly connected pipette, aspirator and ultrasonic atomizer, the bottom that the pipette stretched into the stock solution district, ultrasonic atomizer is equipped with the spray opening that sprays liquid towards detecting the indoor. Under the action of the liquid suction device, the atomized liquid is sucked to the ultrasonic atomizer for atomization through the liquid suction pipe, so that the purpose of maintaining the specific air mass concentration in the material detection chamber by regulating and controlling the spraying liquid amount of the atomizing device can be achieved.
Further, atomizing subassembly below is equipped with the waste liquid and collects the subassembly, the waste liquid is collected the subassembly and is included collecting vat and waste liquid groove, the collecting vat is located the spraying mouth below, the waste liquid pipe intercommunication that collecting vat and waste liquid groove set up through the slope. The waste liquid collecting component is used for collecting waste liquid, so that damage of the waste liquid to the test device is prevented.
Further, the gas balance assembly comprises a mounting plate and a first fan embedded in the mounting plate, wherein the first fan is at least two groups, and the mounting plate is arranged on the side wall of the shell and provided with a plurality of ventilation holes. The first fan work can guarantee to detect indoor gas concentration equilibrium, and the setting of a plurality of ventilation holes can make the indoor outer atmospheric pressure of detection invariable to keep the normal operating of first fan.
Further, the exhaust cooling assembly comprises a second fan and an exhaust pipe, wherein the exhaust pipe is arranged on the side wall of the shell and is connected to the side of the second fan, and the second fan is arranged inside the shell and is at least two groups. The second fan works to exhaust the harmful and polluted gas after the test in the detection chamber through the exhaust pipe, so that the concentration of each gas in the detection chamber is ensured to be reduced to a standard value.
Further, the gas detection assembly comprises a potentiostatic electrochemical sensor and a guide ring, wherein the guide ring surrounds the periphery of the potentiostatic electrochemical sensor; and a constant temperature hole is arranged above the constant potential electrochemical sensor, and the constant temperature hole is formed in the top of the shell. The constant potential electrochemical sensor is integrally connected with the guide ring, and the annular structure of the guide ring ensures that gas flows through the guide ring to form vortex, so that the constant potential electrochemical sensor has the constant function of keeping the gas data collected by the constant potential electrochemical sensor; the constant-temperature hole and the constant-potential electrochemical sensor keep a certain gap, so that the constant-potential electrochemical sensor keeps a constant working temperature range, and the constant-temperature hole has the functions of cooling and radiating heat; the potentiostatic electrochemical sensor may be provided as a formaldehyde-based sensor and/or an organic volatile TVOC sensor.
Further, the potentiostatic electrochemical sensor comprises a shell, a working electrode, a counter electrode, pins, air holes, a filtering membrane, an air permeable membrane and a reference electrode, wherein electrolyte is filled in the inner side of the shell, the air holes are formed in the top of the shell, the air holes, the filtering membrane, the air permeable membrane and the working electrode are sequentially connected, the counter electrode and the reference electrode are arranged at the bottom of the inner side of the shell, the working electrode, the counter electrode and the reference electrode are connected through the electrolyte, and the pins are connected to the bottom of the shell. The working electrode, the counter electrode and the reference electrode are integrally connected through the electrolyte, so that the electrolyte can keep constant voltage of the electrolyte in the cavity after being electrified, and accurate detection of the gas content in the detection chamber is realized.
Further, the temperature control assembly is arranged between the exhaust cooling assembly and the gas detection assembly, and one side of the temperature control device facing the detection chamber is provided with a plurality of ventilation window holes which are regularly arranged. The temperature control assembly provides the temperature required to simulate the specific temperature in the detection chamber, and the ventilation window hole is arranged so that after the first fan is started, the stable and rapid temperature fluctuation of the gas in the material detection chamber is ensured.
Further, still include central controller, screen display, data output module, test solution detection subassembly and power module, liquid supply subassembly, atomizing subassembly, gas balance subassembly, temperature control subassembly, gas detection subassembly, exhaust cooling subassembly, power module, data output module, test solution detection subassembly all are connected with central controller, screen display is connected with data output module. The central controller can send instructions to the liquid supply assembly, the atomization assembly, the gas balance assembly, the temperature control assembly, the gas detection assembly, the exhaust cooling assembly, the power module, the data output module and the test liquid detection assembly, and the screen display can receive data analysis of the data output device and display experimental material analysis data to be tested through the touch screen display plate.
Compared with the prior art, the invention has the beneficial effects that:
the formaldehyde adsorption rate detection test device can regulate and control the indoor temperature, air pressure and gas concentration, thereby improving the accuracy and precision of measurement of the absorption or release amount of formaldehyde volatile organic pollutants;
the formaldehyde adsorption rate detection test device has higher test accuracy and precision and smaller volume, and can be placed in a laboratory to simulate specific air conditions to test the adsorption performance of materials;
according to the formaldehyde adsorption rate detection test device, the central controller and the screen display are arranged to display test data in real time, so that the real-time property and the accuracy of test data recording in a test are improved;
according to the formaldehyde adsorption rate detection test device, the constant potential electrochemical sensor can be replaced by a formaldehyde sensor or an organic volatile TVOC sensor or other sensors according to requirements, so that the multifunction and the flexible activation of the test device are realized, and the application range of the test device is enlarged.
Drawings
FIG. 1 is a schematic diagram of a structure of a removed part of a shell of a formaldehyde adsorption rate detection test device;
FIG. 2 is a schematic view showing the appearance of a formaldehyde adsorption rate detecting test apparatus;
FIG. 3 is a front view of the formaldehyde adsorption rate detection test apparatus with a portion of the housing removed;
FIG. 4 is a rear view of the formaldehyde adsorption rate test unit with a portion of the housing removed;
FIG. 5 is a schematic diagram of a gas detection assembly;
FIG. 6 is a schematic diagram of the structure of a potentiostatic electrochemical sensor of the gas detection assembly;
FIG. 7 is an electrical schematic diagram of a formaldehyde adsorption rate detection test apparatus control system;
in the accompanying drawings: 1-a housing; 11-supporting feet; 12-rubber cushion pad; 13-panel; a 14-USB interface; 15-a movable partition; 16-cover plate; 2-a liquid supply assembly; 21-a reservoir; 22-a filtrate device; 23-liquid feeder; 24-a liquid storage area; 3-an atomizing assembly; 31-pipette; a 32-pipette; 33-an ultrasonic atomizer; 34-a liquid return hopper; 35-a collection tank; 36-a waste liquid tank; 4-a gas balance assembly; 41-mounting plates; 42-a first fan; 43-vent holes; 5-a temperature control assembly; 51-ventilation aperture; 6-a gas detection assembly; 61-potentiostatic electrochemical sensor; 611-a housing; 612—working electrode; 613-a counter electrode; 614-pins; 615-ventilation holes; 616-filtration membrane; 617-breathable film; 618-a reference electrode; 619-electrolyte; 62-a guide ring; 63-a thermostatic orifice; 7-an exhaust cooling assembly; 71-a second fan; 72-exhaust pipe; 8-a central controller; 81-a screen display; 82-a data output module; 83-a power module; 84-three-hole plug; 9-a test solution detection assembly; 91-a test solution state detection electrode; 92-detecting the state of the test solution; 93-micro-grid atomizing tablet.
Detailed Description
The invention is further described below in connection with the following detailed description. Wherein the drawings are for illustrative purposes only and are shown in schematic, non-physical, and not intended to be limiting of the present patent; for the purpose of better illustrating embodiments of the invention, certain elements of the drawings may be omitted, enlarged or reduced and do not represent the size of the actual product; it will be appreciated by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted.
The same or similar reference numbers in the drawings of embodiments of the invention correspond to the same or similar components; in the description of the present invention, it should be understood that, if there is an azimuth or positional relationship indicated by terms such as "upper", "lower", "left", "right", etc., based on the azimuth or positional relationship shown in the drawings, it is only for convenience of describing the present invention and simplifying the description, but it is not indicated or implied that the apparatus or element referred to must have a specific azimuth, be constructed and operated in a specific azimuth, and thus terms describing the positional relationship in the drawings are merely illustrative and should not be construed as limitations of the present patent, and specific meanings of the terms described above may be understood by those skilled in the art according to specific circumstances.
Examples
Referring to fig. 1 to 7, an embodiment of a formaldehyde adsorption rate detection test device according to the present invention includes a housing 1, a detection chamber and a liquid supply assembly 2 disposed inside the housing 1, an atomization assembly 3 for regulating and controlling the air mass concentration in the detection chamber, a gas balance assembly 4 for balancing the air concentration in the detection chamber, a temperature control assembly 5 for regulating and controlling the temperature in the detection chamber, a gas detection assembly 6 for monitoring the formaldehyde content in the detection chamber, and an exhaust cooling assembly 7 for removing the harmful and polluting gas after the test, wherein the atomization assembly 3 is communicated with the liquid supply assembly 2, and the gas balance assembly 4, the temperature control assembly 5, the gas detection assembly 6, and the exhaust cooling assembly 7 are all mounted on the housing 1. Wherein, the bottom of casing 1 is equipped with supporting legs 11 that play a supporting role, and the supporting legs 11 lower extreme is equipped with rubber buffer 12.
In the embodiment, when the device is implemented, liquid is sprayed into a detection chamber through the liquid supply assembly 2 and the atomization assembly 3 to maintain the specific air quality concentration in the detection chamber, the temperature control assembly 5 and the gas balance assembly 4 are arranged to provide the specific temperature required to be simulated in the detection chamber and maintain the concentration balance of the gas in the detection chamber and the gas in the detection chamber, the gas detection assembly 6 is arranged to detect the absorption or release amount of formaldehyde volatile organic pollutants, and the exhaust cooling assembly 7 is arranged to effectively remove harmful pollution gas after test in the detection chamber. The embodiment improves the accuracy and precision of measurement of the absorption or release amount of formaldehyde volatile organic pollutants by controlling, adjusting and detecting the indoor temperature, air pressure and air concentration.
As shown in fig. 7, the formaldehyde adsorption rate detection test device in this embodiment further includes a central controller 8, a screen display 81, a data output module 82, a test solution detection module 9, and a power module 83, where the liquid supply module 2, the atomizing module 3, the gas balance module 4, the temperature control module 5, the gas detection module 6, the exhaust cooling module 7, the power module 83, the data output module 82, and the test solution detection module 9 are all connected with the central controller 8, and the screen display 81 is connected with the data output module 82. The screen display 81 is embedded on the obliquely arranged panel 13, the panel 13 is fixed on the upper part of the shell 1, and the screen display 81 is a touch screen display 81, so that the function of screen display and the function of inputting signals are realized; the data output module 82 may be connected to the screen display 81 to display test data of the test material, and may be used to transmit the test data by externally providing the USB interface 14. In this way, the central controller 8 can send instructions to the liquid supply assembly 2, the atomization assembly 3, the gas balance assembly 4, the temperature control assembly 5, the gas detection assembly 6, the exhaust cooling assembly 7, the power module 83, the data output module 82 and the test liquid detection assembly 9, and the screen display 81 can receive data of the data output device and display analysis data of the tested experimental materials. The power module 83 provides a working power supply for the test device, and the power module 83 is connected with a three-hole plug 84 to supply power to the formaldehyde adsorption rate detection test device by an external power supply.
In this embodiment, the detection chambers may be divided into two detection chambers by using a movable partition 15, in which two independent liquid supply assemblies 2, atomization assemblies 3, gas balance assemblies 4, temperature control assemblies 5, gas detection assemblies 6 and exhaust cooling assemblies 7 are disposed, and each detection chamber may perform comprehensive fine detection on the air quality in a single detection chamber to form two independent subsystems, which are independently controlled by the central controller 8. The detection mode of the control system can be switched by the screen display 81 according to the size of the experimental detection material in the embodiment: when the detection chamber is detected by the double-chamber module, the switchable central control system is in a double-chamber detection mode, and all subsystems below the switchable central control system are operated independently; when the material detection chamber is detected by a single-chamber module, the central control system can be switched to a single-chamber detection mode, and the subsystems below the material detection chamber, including the liquid supply assembly 2, the atomization assembly 3, the gas balance assembly 4, the temperature control assembly 5, the gas detection assembly 6 and the exhaust cooling assembly 7, are switched to a parallel mode by the central controller 8 so as to improve the running performance of the system and the detection precision of the whole experimental material. Wherein, the movable partition 15 is spliced with the shell 1, and a locking piece can be arranged at the upper end of the movable partition 15 to form two independent detection spaces; two sets of cover plates 16 matched with the double chambers respectively are hinged to the top of the shell 1, and the shell 1, the cover plates and the movable partition plates 15 surround to form two cabins and maintain the tightness of the two cabins.
As shown in fig. 3, the liquid supply assembly 2 includes a liquid storage tank 21, a filtrate device 22 and a liquid supply device 23 which are sequentially connected, a cover body is hermetically connected to the top of the liquid storage tank 21, the liquid supply device 23 is arranged at the bottom of the casing 1, the liquid supply device 23 is communicated with a liquid storage area 24, and the liquid storage area 24 is communicated with the atomization assembly 3. The liquid is loaded in the liquid storage tank 21, the liquid in the liquid storage tank 21 flows into the liquid feeder 23 after being filtered by the filter to ensure the purity of the atomized test liquid, the filtered atomized test liquid is stored in the liquid storage area 24, and the atomized device is communicated with the liquid storage area 24 and can take liquid from the liquid storage area 24. In this embodiment, the inner wall of the housing 1 may be provided with a first slot for mounting the liquid storage tank 21, the first slot is provided with an interface for connecting the liquid storage tank 21, the lower part of the liquid storage tank 21 is connected with the upper edge of the filtrate device 22 through a screw interface, the upper part of the liquid storage tank 21 is sealed by a cover body in a screw manner, the liquid storage tank 21 is internally loaded with liquid, and the liquid types can be correspondingly set as organic solvents such as formaldehyde solution and toluene solution or inorganic solvents such as water according to the concentration of each gas in the detection chamber. In the implementation, the type of the liquid in the liquid storage tank and the concentration of each gas in the detection chamber can be set through the screen display 81, the components of the liquid in the liquid storage tank required by the detection chamber are analyzed by the central controller, and then the liquid is conveyed into the detection chamber through the liquid supply assembly and the atomization assembly, so that the condition of specific air concentration in the detection chamber is realized.
The liquid storage tank 21 can be arranged as a U-shaped tank body so that the test liquid in the liquid storage tank 21 is concentrated at the bottom end of the liquid storage tank 21 to improve liquid inlet efficiency; in addition, the filtrate unit 22 of the present embodiment may be integrally connected to the liquid supply unit 23, and the liquid supply unit 23 and the liquid storage area 24 may be communicated through a bayonet tube.
As shown in fig. 3, the atomizing assembly 3 comprises a liquid suction pipe 31, a liquid suction pipe 32 and an ultrasonic atomizer 33 which are sequentially connected, wherein the liquid suction pipe 31 extends to the bottom of the liquid storage area 24, and the ultrasonic atomizer 33 is provided with a spray opening for spraying liquid towards the detection chamber; in practice, the atomized liquid is sucked into the ultrasonic atomizer 33 for atomization through the liquid suction pipe 31 under the action of the liquid suction pipe 32, so that the specific air mass concentration in the material detection chamber can be maintained by regulating and controlling the spraying liquid amount of the atomizing device. In this embodiment, the pipette 31 and the pipette 32 are integrally connected, a liquid return bucket 34 is connected between the pipette 31 and the pipette 32 to receive the return liquid, an ultrasonic stabilizer is connected to the ultrasonic atomizer 33 to improve the working stability of the ultrasonic atomizer 33, and a waste liquid collecting assembly is arranged below the atomizing assembly 3 to collect waste liquid and prevent the damage of the waste liquid to the test device. Wherein, waste liquid collection subassembly includes collecting vat 35 and waste liquid groove 36, and collecting vat 35 locates the spraying mouth below, and collecting vat 35 and waste liquid groove 36 pass through the waste liquid pipe intercommunication that the slope set up, and the waste liquid pipe plays the effect of waste liquid collection conveying.
As shown in fig. 4, the gas balance assembly 4 is mounted beside the exhaust cooling assembly 7, and includes a mounting plate 41 and a first fan 42 embedded in the mounting plate 41, wherein the first fan 42 is at least two groups, the mounting plate 41 is mounted on a side wall of the housing 1, and a plurality of ventilation holes 43 are formed in the mounting plate 41. Wherein, the first fan 42 works to ensure the gas concentration in the detection chamber to be balanced, and the plurality of ventilation holes 43 can ensure the constant air pressure in the detection chamber and the outside so as to maintain the normal operation of the first fan 42.
As shown in fig. 4, the exhaust cooling assembly 7 includes a second fan 71 and an exhaust pipe 72, the exhaust pipe 72 is disposed on a side wall of the housing 1, the exhaust pipe 72 is connected to a side of the second fan 71, the second fan 71 is disposed inside the housing 1, and the second fans 71 are at least two groups. The second fan 71 works to discharge the harmful and polluted gas after the test in the detection chamber through the exhaust pipe 72, so as to ensure that the concentration of each gas in the detection chamber is reduced to the standard value. In addition, the second fan 71 can also be used to detect the balance of indoor temperature, preventing the sensitivity of the potentiostatic electrochemical sensor 61 from decreasing due to the excessive temperature, and preventing the service life of the gas detection assembly 6 from decreasing.
In this embodiment, the first fans 42 and the second fans 71 are two groups, the two groups of second fans 71 are disposed at the bottom of the housing 1, one group of first fans 42 and the second fans 71 are disposed at the bottom of the housing 1 side by side and are located at one side of the second fans 71 away from the exhaust duct 72, and the other group of first fans 42 are disposed above the exhaust duct 72 and are fixed on the side wall of the housing 1.
As shown in fig. 5, the gas detection module 6 includes a potentiostatic electrochemical sensor 61 and a guide ring 62, the guide ring 62 surrounding the potentiostatic electrochemical sensor 61; a constant temperature hole 63 is arranged above the constant potential electrochemical sensor 61, and the constant temperature hole 63 is arranged at the top of the shell 1. The potentiostatic electrochemical sensor 61 is integrally connected with the guide ring 62, and the annular structure of the guide ring 62 ensures that gas flows through the guide ring 62 to form vortex, so that the potentiostatic electrochemical sensor 61 can keep the data of the gas constant and ensure the measurement accuracy; the constant temperature hole 63 and the constant potential electrochemical sensor 61 keep a certain gap, so that the constant potential electrochemical sensor 61 keeps a constant working temperature range, and the constant temperature hole 63 has the functions of cooling and heat dissipation. In addition, the potentiostatic electrochemical sensor 61 of the present embodiment may be configured as a formaldehyde sensor and/or an organic volatile TVOC sensor, and the potentiostatic electrochemical sensor 61 of the present embodiment is detachably connected to the housing 1. Thus, the user can freely change the type of the potentiostatic electrochemical sensor 61 according to the test requirements, thereby realizing the multifunction of the formaldehyde adsorption rate detection test device.
Specifically, as shown in fig. 6, the potentiostatic electrochemical sensor 61 includes a housing 611, a working electrode 612, a counter electrode 613, a pin 614, a vent 615, a filtering membrane 616, a gas permeable membrane 617 and a reference electrode 618, wherein the inside of the housing 611 is filled with an electrolyte 619, the vent 615 is disposed at the top of the housing 611, the vent 615, the filtering membrane 616, the gas permeable membrane 617 and the working electrode 612 are sequentially connected, the counter electrode 613 and the reference electrode 618 are disposed at the bottom of the inside of the housing 611, the working electrode 612, the counter electrode 613 and the reference electrode 618 are connected by the electrolyte 619, and the pin 614 is connected to the bottom of the housing 611. The working electrode 612, the counter electrode 613 and the reference electrode 618 are integrally connected through the electrolyte 619, so that the electrolyte 619 can keep the voltage of the electrolyte 619 in the cavity constant after being electrified, and accurate detection of the gas content in the detection chamber is realized.
As shown in fig. 3, the temperature control unit 5 is disposed between the exhaust cooling unit 7 and the gas detection unit 6, and is disposed at two sides of the movable partition 15, and a plurality of ventilation windows 51 are disposed on the side of the temperature control unit facing the detection chamber, and the ventilation windows 51 may be disposed on the side of the temperature control unit on the two sides as required. In this manner, the temperature control assembly 5 provides for the simulation of a particular temperature within the detection chamber, and the vent aperture 51 is provided to ensure a stable and rapid temperature fluctuation of the material detection chamber gas after the first fan 42 is activated. In this embodiment, the temperature control assembly 5 includes a temperature and humidity sensor capable of detecting temperature and humidity changes of the indoor gas in real time and a heater for increasing the temperature of the detected indoor gas, and when the temperature and humidity sensor detects the temperature and humidity of the detected indoor gas and transmits the detected indoor gas to the central controller 8, the central controller 8 controls the temperature and humidity of the detected indoor gas by controlling the heater and the first fan 42 and the second fan 71 to work or not.
As shown in fig. 3, the test solution detecting assembly 9 includes a test solution state detecting electrode 91, a test solution state detecting contact 92 and a micro-grid atomizing plate 93, wherein the test solution state detecting electrode 91 is disposed at a junction of the liquid storage tank 21 and the filter, the test solution state detecting contact 92 is disposed at a junction of the liquid storage tank 21 and the filter and at a gap junction between the liquid suction pipe 31 and the liquid storage area 24, the test solution state detecting contact 92 is connected with the test solution state detecting electrode 91, the test solution state detecting electrode 91 forms a closed capacitor with a positive electrode of the micro-grid atomizing plate 93 and a liquid in the liquid storage area 24, and the micro-grid atomizing plate 93 is a constituent part of the ultrasonic atomizer 33. Thus, the reagent detecting assembly 9 can be used to determine the filling state of the liquid in the liquid storage area 24 and the liquid storage tank 21: when the reagent detecting module 9 detects that the amounts of the reagents in the liquid storage tank 21 and the liquid storage area 24 are lower than the standard value, the reagent detecting module 9 feeds back a signal of shortage of the reagents to the central controller 8 through a signal of the test detection state contact to control the micro-grid atomizing sheet 93 to stop atomization, and feeds back information of the amounts of the reagents in the liquid storage tank 21 and the liquid storage area 24 to the screen display 81 by the central controller 8.
It is to be understood that the above examples of the present invention are provided by way of illustration only and not by way of limitation of the embodiments of the present invention. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the invention are desired to be protected by the following claims.
Claims (7)
1. The formaldehyde adsorption rate detection test device is characterized by comprising a shell (1), a detection chamber and a liquid supply assembly (2) which are arranged in the shell (1), an atomization assembly (3) for regulating and controlling the mass concentration of air in a detection chamber, a gas balance assembly (4) for balancing the concentration of gas in the detection chamber, a temperature control assembly (5) for regulating and controlling the temperature in the detection chamber, a gas detection assembly (6) for monitoring the content of formaldehyde in the detection chamber and an exhaust cooling assembly (7) for removing harmful and polluted gas after the test, wherein the atomization assembly (3) is communicated with the liquid supply assembly (2), and the gas balance assembly (4), the temperature control assembly (5), the gas detection assembly (6) and the exhaust cooling assembly (7) are all arranged in the shell (1); the gas detection assembly (6) comprises a potentiostatic electrochemical sensor (61) and a guide ring (62), wherein the guide ring (62) surrounds the periphery of the potentiostatic electrochemical sensor (61); a constant temperature hole (63) is arranged above the constant potential electrochemical sensor (61), and the constant temperature hole (63) is arranged at the top of the shell (1); the constant potential electrochemical sensor (61) comprises a shell (611), a working electrode (612), a counter electrode (613), pins (614), ventilation holes (615), a filtering membrane (616), a ventilation membrane (617) and a reference electrode (618), electrolyte (619) is filled inside the shell (611), the ventilation holes (615) are formed in the top of the shell (611), the ventilation holes (615), the filtering membrane (616), the ventilation membrane (617) and the working electrode (612) are sequentially connected, the counter electrode (613) and the reference electrode (618) are formed in the bottom of the inner side of the shell (611), the working electrode (612), the counter electrode (613) and the reference electrode (618) are connected through the electrolyte (619), and the pins (614) are connected to the bottom of the shell (611); the temperature control assembly (5) is arranged between the exhaust cooling assembly (7) and the gas detection assembly (6), and a plurality of regularly arranged ventilation window holes (51) are formed in one side of the temperature control assembly (5) facing the detection chamber.
2. The formaldehyde adsorption rate detection test device according to claim 1, wherein the liquid supply assembly (2) comprises a liquid storage tank (21), a filtrate device (22) and a liquid supply device (23) which are sequentially connected, a cover body is connected to the top of the liquid storage tank (21) in a sealing mode, the liquid supply device (23) is arranged at the bottom of the shell (1) and is communicated with a liquid storage area (24), and the liquid storage area (24) is communicated with the atomization assembly (3).
3. The formaldehyde adsorption rate detection test apparatus as claimed in claim 2, wherein the atomizing assembly (3) comprises a pipette (31), a pipette (32) and an ultrasonic atomizer (33) which are sequentially connected, the pipette (31) extends into the bottom of the liquid storage area (24), and the ultrasonic atomizer (33) is provided with a spray opening for spraying liquid toward the detection chamber.
4. A formaldehyde adsorption rate detection test apparatus according to claim 3 wherein a waste liquid collection assembly is provided below the atomizing assembly (3), the waste liquid collection assembly comprises a collection tank (35) and a waste liquid tank (36), the collection tank (35) is provided below the spray opening, and the collection tank (35) is communicated with the waste liquid tank (36) through a waste liquid pipe arranged obliquely.
5. The formaldehyde adsorption rate detection test device according to claim 1, wherein the gas balance assembly (4) comprises a mounting plate (41) and a first fan (42) embedded in the mounting plate (41), the first fan (42) is at least two groups, the mounting plate (41) is mounted on the side wall of the shell (1), and a plurality of ventilation holes (43) are formed in the mounting plate (41).
6. The formaldehyde adsorption rate detection test apparatus as claimed in claim 1, wherein the exhaust cooling assembly (7) comprises a second fan (71) and an exhaust pipe (72), the exhaust pipe (72) is arranged on the side wall of the housing (1), the exhaust pipe (72) is connected to the side of the second fan (71), the second fan (71) is arranged in the housing (1), and the second fans (71) are at least two groups.
7. The formaldehyde adsorption rate detection test apparatus as claimed in any one of claims 1 to 6, further comprising a central controller (8), a screen display (81), a data output module (82), a test solution detection assembly (9) and a power module (83), wherein the liquid supply assembly (2), the atomizing assembly (3), the gas balance assembly (4), the temperature control assembly (5), the gas detection assembly (6), the exhaust cooling assembly (7), the power module (83), the data output module (82) and the test solution detection assembly (9) are all connected with the central controller (8), and the screen display (81) is connected with the data output module (82).
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