Formaldehyde tester

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By setting a cover plate and a second air inlet on the rear case of the formaldehyde tester, a comprehensive formaldehyde detection of wooden cards is achieved, solving the problem of inaccurate detection in the prior art and improving the accuracy of detection.

CN222482187UActive Publication Date: 2025-02-14GLOBAL CARD SYSTEMS CO LTD

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Patent Information

Application Number: CN202420059136.9
Authority / Receiving Office: CN · China
Patent Type: Utility models(China)
Current Assignee / Owner
Filing Date: 2024-01-09
Publication Date: 2025-02-14
Estimated Expiration: 2034-01-09

AI Technical Summary

Technical Problem

The existing formaldehyde tester can only detect the formaldehyde emission in one area of the wooden card, and cannot accurately detect the formaldehyde emission in all areas of the wooden card, resulting in inaccurate detection.

Method used

A formaldehyde tester is designed. By setting a cover plate on the rear shell of the shell, a working cavity is formed, and a second air inlet is provided on the side of the cover plate to ensure that air can enter from the second air inlet and pass by. The two sides and surfaces of the wooden card are detected, and then they enter the inside of the shell through the first air inlet, achieving comprehensive formaldehyde detection of the wooden card.

Benefits of technology

Through this design, the formaldehyde detection sensor can more accurately detect the formaldehyde emission of wooden cards, improving the accuracy and reliability of the detection.

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Figure CN222482187U_ABST

Patent Text Reader

Abstract

The utility model provides a formaldehyde tester which comprises a shell, and the shell comprises a front shell and a rear shell which are in butt joint. A key module and a display screen are arranged on the front shell, and a first air inlet and an air outlet are formed in the rear shell; a circuit board is arranged in the shell, a formaldehyde detection sensor and an air driving device are arranged on the face, close to the rear shell, of the circuit board, the air driving device is arranged below the air outlet, and the formaldehyde detection sensor is arranged below the first air inlet; a cover plate is arranged on the side, away from the front shell, of the rear shell, the cover plate and the rear shell form a working cavity, and the first air inlet communicates with the working cavity. And a second air inlet is formed in the side part of the cover plate. When the to-be-detected wooden card is placed in the working cavity, the air of the second air inlet can pass through the two sides of the to-be-detected wooden card and the surface of the wooden card, so that the formaldehyde detection sensor can more accurately detect the formaldehyde emission of the wooden card, and the detection is more accurate.

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Description

Technical Field

[0001] The utility model relates to the technical field of formaldehyde testing, in particular to a formaldehyde tester. Background Art

[0002] Wooden cards often need to be bonded with adhesives to ensure that the wood chips are firmly bonded. However, adhesives will cause wooden cards to contain formaldehyde, which will have a certain impact on the user's health. Therefore, wooden cards need to be tested with a formaldehyde tester before leaving the factory. They can only leave the factory after the formaldehyde emission test is qualified.

[0003] The existing formaldehyde tester includes a tester, a front shell is arranged on the front of the tester, a rear shell is arranged on the back of the tester, the front shell is fixedly connected to the rear shell by screws, an air hole is arranged on the top of the front of the front shell, a transmitting sound playing port is arranged in the middle of the bottom of the front shell, a fan arranged inside the tester is arranged on one side of the air hole, a sound player arranged inside the tester is arranged on one side of the sound playing port, a single-chip microcomputer controller is arranged at one end of the fan, a formaldehyde sensor is arranged at one end of the single-chip microcomputer controller, a storage module, a signal conversion module and a display module are arranged in the single-chip microcomputer controller, and the single-chip microcomputer controller is electrically connected to the battery slot through a connecting line. However, the formaldehyde tester only has an air hole. When testing the formaldehyde of a wooden card, the air hole can only detect the formaldehyde emission of one area of the wooden card, and cannot test the formaldehyde emission of all areas of the wooden card, so that the formaldehyde emission of the wooden card is not detected correctly, and the formaldehyde emission of the wooden card cannot be accurately detected. Utility Model Content

[0004] The utility model aims to provide a formaldehyde tester which can accurately detect the formaldehyde release amount of wooden cards.

[0005] In order to achieve the above-mentioned purpose, the formaldehyde tester provided by the utility model includes: a shell, the shell includes a front shell and a rear shell connected to each other; the front shell is provided with a key module and a display screen, and the rear shell is provided with a first air inlet and an air outlet; a circuit board is provided inside the shell, and a formaldehyde detection sensor and an air driving device are provided above a side of the circuit board close to the rear shell, the air driving device is provided below the air outlet, and the formaldehyde detection sensor is provided below the first air inlet; a cover plate is provided on the side of the rear shell away from the front shell, the cover plate and the rear shell form a working cavity, the first air inlet is connected to the working cavity, and a second air inlet is provided on the side of the cover plate.

[0006] As can be seen from the above scheme, the formaldehyde tester of the utility model is provided with a cover plate, a second air inlet is provided on the side of the cover plate, and the working cavity is connected with the first air inlet, so driven by the air drive device, air can enter from the second air inlet, enter the inside of the shell from the first air inlet, and go out from the air outlet after passing through the inside of the shell. When the wooden card to be tested is placed in the working cavity, the air from the second air inlet can pass through the two sides of the wooden card to be tested and the surface of the wooden card, so that the formaldehyde detection sensor can more accurately detect the formaldehyde release of the wooden card, making the detection more accurate.

[0007] In a further solution, the rear shell is provided with a protrusion, and the wooden card to be detected abuts against the protrusion.

[0008] It can be seen that the protrusion can prevent the wooden card to be detected from being attached to the first air inlet, so that the first air inlet can be connected to the second air inlet.

[0009] In a further solution, a threaded hole is provided on the cover plate, a fixing screw passes through the threaded hole, and the fixing screw abuts against the wooden card to be detected.

[0010] It can be seen that the fixing screw can fix the wooden card to be detected, so that the wooden card to be detected will not shake during the detection.

[0011] In a further solution, the circuit board is provided with a first through hole, and the first through hole is provided below the first air inlet; the circuit board is also provided with a second through hole, and the second through hole is provided below the air driving device.

[0012] It can be seen that the first through hole and the second through hole can allow air to circulate, so that the formaldehyde detection sensor can achieve more accurate detection.

[0013] In a further solution, a temperature and humidity sensor and a VOC sensor are further arranged above one side of the circuit board close to the rear shell, and the temperature and humidity sensor, the VOC sensor and the formaldehyde detection sensor are arranged close to the first air inlet.

[0014] It can be seen that by placing the sensor close to the first air inlet, the sensor can receive the detection data of the wooden card to be detected in time, making the detection more accurate.

[0015] In a further solution, the temperature and humidity sensor, the VOC sensor, the formaldehyde detection sensor, the display screen, the button module and the air drive device are connected to the main control module.

[0016] It can be seen that the main control module can control the operation of each module of the formaldehyde tester.

[0017] In a further solution, a power supply module is provided inside the shell, and the power supply module is connected to the temperature and humidity sensor, the VOC sensor, the formaldehyde detection sensor, the display screen, the button module, the air drive device, and the main control module.

[0018] It can be seen that the power supply module can supply power to each module of the formaldehyde tester.

[0019] In a further solution, the first air inlet, the second air inlet, the first through hole, the second through hole, and the air outlet sequentially form an air flow channel.

[0020] It can be seen that the air flow channel allows air to circulate better in the formaldehyde tester, thereby allowing the formaldehyde tester to detect data more accurately.

[0021] In a further solution, the temperature and humidity sensor, the VOC sensor, and the formaldehyde detection sensor are arranged around the first through hole.

[0022] It can be seen that when the air is circulating, each sensor can detect the air data in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a front shell structure diagram of an embodiment of the formaldehyde tester of the utility model.

[0024] Figure 2 It is a structural diagram of the rear shell and cover plate of the embodiment of the formaldehyde tester of the utility model.

[0025] Figure 3 This is a structural diagram of the rear shell and the cover plate of the embodiment of the formaldehyde tester of the utility model from another perspective.

[0026] Figure 4 It is a structural diagram of the rear shell and protrusion of an embodiment of the formaldehyde tester of the utility model.

[0027] Figure 5 It is a structural diagram of a circuit board of an embodiment of the formaldehyde tester of the utility model.

[0028] Figure 6 It is a structural exploded view of a circuit board and an air driving device of an embodiment of the formaldehyde tester of the utility model.

[0029] Figure 7 It is a structural diagram of an embodiment of the formaldehyde tester of the utility model and a wooden card to be tested.

[0030] Figure 8 It is a structural exploded view of an embodiment of the formaldehyde tester of the utility model and a wooden card to be tested.

[0031] The present invention will be further described below with reference to the accompanying drawings and embodiments. DETAILED DESCRIPTION

[0032] See also Figure 1 and Figure 2 The formaldehyde tester of the utility model comprises a housing 1, which comprises a front housing 2 and a rear housing 3 connected to each other. A key module 22 and a display screen 21 are arranged on the front housing 2. The display screen 21 is used to display the detected data, such as formaldehyde emission, temperature and humidity data, and volatile organic compound data. The key module 22 can be used by the user to control the execution of the formaldehyde detection operation.

[0033] See also Figure 2 and Figure 3 , the rear shell 3 is provided with a first air inlet 32 and an air outlet 31, and a cover plate 4 is provided on a side of the rear shell 3 away from the front shell 2, and a second air inlet 41 is provided on the side of the cover plate 4. Further, the second air inlet 41 is provided on both the first side and the second side of the cover plate 4. Further, the cover plate 4 is provided above the first air inlet 32. The cover plate 4 and the rear shell 3 form a working cavity 42. The smart card to be detected can be provided in the working cavity 42. Among them, the working cavity 42 is connected to the second air inlet 41.

[0034] See also Figure 4 The rear shell 3 is provided with a protrusion 33. Further, the protrusion 33 is arranged in the working cavity 42. When in use, the protrusion 33 can prevent the wooden card to be detected from fitting with the first air inlet 32 so that air cannot enter through the first air inlet.

[0035] The cover plate is also provided with a threaded hole (not shown in the figure), through which a fixing screw 7 passes. The fixing screw 7 is threadedly connected with the threaded hole. The fixing screw 7 is used to fix the wooden card to be detected.

[0036] Due to the setting of the protrusion 33 and the fixing screw 7, it is ensured that when the formaldehyde detector detects different wooden cards 6 to be detected, the interval between the wooden card 6 to be detected and the first air inlet 32 is the same, so that the wind resistance of the first air inlet 32 is constant when the formaldehyde detector detects different wooden cards 6 to be detected, thereby reducing the error of the measurement value.

[0037] See also Figure 5 and Figure 6 A circuit board 5 is arranged inside the housing 1, and a formaldehyde detection sensor 522, a VOC detection sensor 521, and a temperature and humidity sensor 523 are arranged on one side of the circuit board 5 close to the rear housing. The formaldehyde detection sensor 522, the VOC detection sensor 521, and the temperature and humidity sensor 523 are arranged below the first air inlet 31. The formaldehyde detection sensor 522 can timely obtain the formaldehyde emission data of the wood card to be detected, the VOC detection sensor 521 can timely obtain the volatile organic matter data of the wood card to be detected, and the temperature and humidity sensor 523 can timely obtain the temperature and humidity data of the wood card to be detected.

[0038] An air driving device 51 is also provided on one side of the circuit board 5 close to the rear housing. The air driving device 51 is provided below the air outlet 31. The air driving device 51 can discharge air in time. Specifically, the air driving device 51 is a fan.

[0039] The circuit board 5 is provided with a first through hole 54, which is provided below the first air inlet 32; the circuit board 5 is provided with a second through hole 55, which is provided below the air driving device 51. The first air inlet 32, the second air inlet 41, the first through hole 54, the second through hole 55, and the air outlet 31 sequentially form an air flow channel. The air enters from the second air inlet 41, enters the interior of the housing 1 through the first air inlet 32, enters the space formed by the circuit board 5 and the front housing 2 from the first through hole 54, and then exits from the second through hole 55, and is discharged from the air outlet 31 through the air driving device 51.

[0040] The temperature and humidity sensor 523, the VOC sensor 521, and the formaldehyde detection sensor 522 are arranged around the first through hole 54. When the air enters the interior of the housing 1 from the first air inlet 32 and then enters the space formed by the circuit board 5 and the front housing 2 from the first through hole 54, the air from the first air inlet 32 will pass through the temperature and humidity sensor 523, the VOC sensor 521, the formaldehyde detection sensor 522 and other sensors and then enter the first through hole 54, so that the detection of each sensor is more accurate.

[0041] The formaldehyde tester also includes a main control module (not shown in the figure), and the temperature and humidity sensor 523, VOC sensor 521, formaldehyde detection sensor 522, display screen 21, button module 22 and air drive device 51 are connected to the main control module, and the main control module can control the operation of each module of the formaldehyde tester.

[0042] A power supply module 53 is provided inside the housing 1, and the power supply module 53 is connected to the temperature and humidity sensor 523, the VOC sensor 521, the formaldehyde detection sensor 522, the display screen 21, the key module 22, the air drive device 51, and the main control module. The power supply module 53 can supply power to each module of the formaldehyde tester.

[0043] See also Figure 7 and Figure 8When the formaldehyde detector is in use, the wooden card 6 to be detected is inserted into the working cavity 42, wherein the wooden card 6 to be detected abuts against the protrusion 33, and the fixing screw 7 abuts against the wooden card 6 to be detected. The protrusion 33 can prevent the wooden card 6 to be detected from being attached to the first air inlet 32, so that the first air inlet 32 can be connected to the second air inlet 41. The fixing screw 7 can fix the wooden card 6 to be detected, so that the wooden card 6 to be detected will not shake during detection. In addition, due to the setting of the protrusion 33 and the fixing screw 7, it is ensured that when the formaldehyde detector detects different wooden cards 6 to be detected, the interval between the wooden card 6 to be detected and the first air inlet 32 is the same, so that the wind resistance of the first air inlet 32 is constant when the formaldehyde detector detects different wooden cards 6 to be detected, thereby reducing the error of the measurement value.

[0044] The air enters from the second air inlet 41, passes through the two sides of the wooden card 6 to be detected, and then enters the interior of the housing 1 through the first air inlet 32. When the wooden card 6 to be detected is placed in the working cavity, the air from the second air inlet 41 can pass through the two sides of the wooden card 6 to be detected and the surface of the wooden card 6 to be detected, so that the formaldehyde detection sensor 522 can more accurately detect the formaldehyde release of the wooden card 6, making the detection more accurate.

[0045] When the formaldehyde tester is used, the zeroing operation is first performed, that is, under clean air, a wooden card calibrated to zero is inserted into the working chamber 42, the wooden card is fixed with the fixing screw 7, and the zeroing button in the button module 22 is pressed. The formaldehyde tester marks the data detected at this time as zero.

[0046] Then insert the wooden card 6 to be tested into the working cavity 42, fix the wooden card 6 to be tested with the fixing screw 7, press the detection button in the button module 22, and the formaldehyde tester starts to work, driving the air driving device 51 to work to make the air flow, and each sensor collects data. The screen can display the data collected by each sensor.

[0047] The above are only preferred embodiments of the present invention, but the design concept of the present invention is not limited thereto. Without departing from the concept of the present invention, more other equivalent embodiments may be included. It is possible for those skilled in the art to make various obvious changes, readjustments and substitutions without departing from the protection scope of the present invention.

Claims

1. A formaldehyde tester, comprising a housing, wherein the housing comprises a front housing and a rear housing connected to each other; The front shell is provided with a button module and a display screen, and the rear shell is provided with a first air inlet and an air outlet; A circuit board is disposed inside the housing, a formaldehyde detection sensor and an air driving device are disposed on a side of the circuit board close to the rear housing, the air driving device is disposed below the air outlet, and the formaldehyde detection sensor is disposed below the first air inlet; Features: A cover plate is provided on one side of the rear shell away from the front shell, the cover plate and the rear shell form a working cavity, and the first air inlet is connected to the working cavity; A second air inlet is arranged on the side of the cover plate.

2. The formaldehyde tester according to claim 1, characterized in that: The rear shell is provided with a protrusion, and the wooden card to be detected abuts against the protrusion.

3. The formaldehyde tester according to claim 2, characterized in that: The cover plate is provided with a threaded hole, through which a fixing screw passes, and the fixing screw abuts against the wooden card to be detected.

4. The formaldehyde tester according to any one of claims 1 to 3, characterized in that: The circuit board is provided with a first through hole, and the first through hole is arranged below the first air inlet; The circuit board is also provided with a second through hole, and the second through hole is arranged below the air driving device.

5. The formaldehyde tester according to claim 4, characterized in that: A temperature and humidity sensor and a VOC sensor are also arranged above one side of the circuit board close to the rear shell. The temperature and humidity sensor, the VOC sensor and the formaldehyde detection sensor are arranged close to the first air inlet.

6. The formaldehyde tester according to claim 5, characterized in that: The temperature and humidity sensor, the VOC sensor, the formaldehyde detection sensor, the display screen, the key module and the air drive device are connected to a main control module.

7. The formaldehyde tester according to claim 6, characterized in that: A power supply module is arranged inside the shell, and the power supply module is connected with the temperature and humidity sensor, the VOC sensor, the formaldehyde detection sensor, the display screen, the button module, the air drive device, and a main control module.

8. The formaldehyde tester according to claim 4, characterized in that: The first air inlet, the second air inlet, the first through hole, the second through hole, and the air outlet sequentially form an air flow channel.

9. The formaldehyde tester according to claim 7, characterized in that: The temperature and humidity sensor, the VOC sensor, and the formaldehyde detection sensor are arranged around the first through hole.