A formaldehyde detector for wood cassettes

Abstract

This utility model discloses a formaldehyde detector for wooden cards, belonging to the technical field of environmental testing equipment. It aims to solve the technical problems of inconvenience and inaccuracy in formaldehyde detection of small wooden products such as wooden IC cards. The technical solution of this utility model includes: a main body with a wooden card placement cavity, an air inlet channel, and an exhaust channel; an openable and closable door; a first fan installed in the exhaust channel for generating airflow; a first formaldehyde detection sensor also installed in the exhaust channel for detecting formaldehyde concentration; a weighing unit installed on the top of the main body; and a main control unit electrically connected to the fan, sensor, and weighing unit. This utility model, by constructing a micro-environment integrating weighing and closed airflow detection, enables rapid and accurate detection of formaldehyde release from small samples such as wooden cards, effectively eliminating environmental interference and achieving functional integration and convenient operation.

Description

Technical Field

[0001] This utility model relates to the field of environmental testing equipment technology, and more specifically, to a formaldehyde detector for wood veneers. Background Technology

[0002] In recent years, with increasing awareness of environmental protection and health, new types of wood products such as wooden IC cards, wooden membership cards, and decorative wood chips have become increasingly popular in the market. However, these products may use formaldehyde-containing adhesives or treatment agents during the manufacturing process, resulting in formaldehyde residue in the finished products and its release into the environment. According to relevant industry standards, there are strict requirements for the formaldehyde content of wood products when they leave the factory, and the core indicator is usually "the formaldehyde volatilization per unit weight of wood within a standard time shall not exceed the specified value." Therefore, accurate and efficient formaldehyde emission testing of these small wood products has become a key link in ensuring product quality and user health.

[0003] Currently, common formaldehyde testing methods, such as the 1 cubic meter climate chamber method, while standard, involve large, expensive equipment and have long testing cycles, making them unsuitable for rapid quality inspection of small-sized, high-volume products like wooden IC cards. Meanwhile, commercially available portable formaldehyde detectors are primarily used to measure ambient air concentrations in open spaces like indoors. However, directly measuring near wooden cards is highly susceptible to interference from surrounding airflow and fluctuations in background formaldehyde concentration, resulting in highly random and unrepeatable measurement results that fail to accurately reflect the formaldehyde volatilization characteristics of the sample itself.

[0004] Therefore, how to provide a specialized device that is compact, easy to operate, and can quickly and accurately detect formaldehyde emissions from small wooden products such as wooden IC cards has become a technical problem that urgently needs to be solved in this field. Utility Model Content

[0005] The purpose of this invention is to provide a formaldehyde detector for wood products, which aims to solve the problems of inconvenience and inaccuracy in the existing technology for formaldehyde detection of small wood products.

[0006] This utility model provides a formaldehyde detector for wood veneer, comprising:

[0007] The main body has a wooden card placement cavity, and an air intake channel and an exhaust channel respectively connected to the wooden card placement cavity;

[0008] The hatch, which can be opened and closed, is located on one side of the main body and is used to open and close the wooden card placement cavity;

[0009] The first fan, located in the exhaust channel, is used to generate airflow from the wooden card placement cavity toward the exhaust channel;

[0010] The first formaldehyde detection sensor is installed in the exhaust channel to detect the formaldehyde concentration of the gas discharged from the wooden card placement chamber;

[0011] The weighing unit is located on the top of the main body;

[0012] The main control unit is electrically connected to the first fan, the first formaldehyde detection sensor, and the weighing unit.

[0013] Optionally, a second fan and a second formaldehyde detection sensor are provided in the air intake channel. Both the second fan and the second formaldehyde detection sensor are electrically connected to the main control unit. The second fan is used to generate airflow from the air intake channel toward the wood card placement cavity.

[0014] Optionally, the first formaldehyde detection sensor is located on the air inlet side of the first fan; and / or, the second formaldehyde detection sensor is located on the air outlet side of the second fan.

[0015] Optionally, it also includes a bracket that can be detachably placed within the wooden card placement cavity.

[0016] Optionally, it also includes a fan speed adjustment switch, which is electrically connected to the main control unit and is used to adjust the speed of the first fan.

[0017] Optionally, it also includes a display screen, which is electrically connected to the main control unit.

[0018] Optionally, the weighing unit includes a tray and a weighing sensor, with the tray positioned on top of the main body and the weighing sensor positioned between the main body and the tray.

[0019] Optionally, it also includes a power switch, which is electrically connected to the main control unit.

[0020] Based on the technical content disclosed in this utility model, the following beneficial effects are achieved:

[0021] The formaldehyde detector for wooden cards provided by this utility model constructs a miniature, controlled detection environment by setting up a wooden card placement chamber with inlet and outlet channels, and integrating a first fan and a first formaldehyde detection sensor in the outlet channel. During operation, the main control unit controls the first fan to drive gas flow through the wooden card placement chamber containing the wooden cards to be tested, carrying the formaldehyde released from the wooden cards. The first formaldehyde detection sensor then measures the concentration, thus achieving targeted and closed-loop detection of formaldehyde release from the wooden cards. Simultaneously, the detector integrates a weighing unit on the top of the device, allowing for convenient acquisition of the weight of the wooden cards before testing. This provides a data basis for the main control unit to calculate the formaldehyde release rate per unit weight, achieving a high degree of functional integration. The formaldehyde detector for wooden cards provided by this utility model has a compact overall structure, is easy to operate, and is highly suitable for the rapid screening and detection of small-sized wooden samples.

[0022] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0024] Figure 1 This is a structural diagram of the formaldehyde detector for wood veneer of this utility model.

[0025] Figure 2 This is an exploded view of the wood-based formaldehyde detector of this utility model.

[0026] Figure 3 This is a top view of the formaldehyde detector for wood veneers according to this utility model.

[0027] Figure 4 for Figure 3 Sectional view along line AA.

[0028] Explanation of reference numerals in the attached drawings: 1. Main body; 2. Wooden card placement cavity; 3. Exhaust channel; 4. Intake channel; 5. Door; 6. First fan; 7. Second fan; 8. First formaldehyde detection sensor; 9. Second formaldehyde detection sensor; 10. Bracket; 11. Fan speed adjustment switch; 12. Display screen; 13. Power switch; 14. Weighing sensor; 15. Tray; 16. Circuit board. Detailed Implementation

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0032] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0033] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0034] See Figures 1 to 4This utility model provides a formaldehyde detector for wooden IC cards. The formaldehyde detector is designed as an integrated desktop device. It mainly includes a detection system for holding the sample to be tested (such as a wooden IC card), a weighing system for measuring the sample mass, and a main control system for control and display. The core of the detection system is a cavity with an internal airflow channel, and the weighing system is located on top of the device for convenient sample weighing before testing.

[0035] Specifically, the detector has a single, integrated body 1. Body 1 can be injection molded or stamped from plastic or metal, and its interior is designed with a core wooden card placement cavity 2. The wooden card placement cavity 2 is the space for placing the wooden card sample to be tested. On the front side wall of body 1, there is an opening communicating with the wooden card placement cavity 2, which is closed by a hatch 5 that can be flipped up and down or pulled open laterally. Opening the hatch 5 allows the wooden card to be inserted or removed; closing the hatch 5 creates a relatively sealed testing space.

[0036] To create a directional and stable airflow within the wooden card placement cavity 2, an air inlet channel 4 and an exhaust channel 3 are respectively provided on both sides of the main body 1, both of which are connected to the wooden card placement cavity 2. (Refer to...) Figure 4 The airflow enters from the intake channel 4 on one side, flows through the wooden card placement cavity 2, and then exits from the exhaust channel 3 on the other side.

[0037] A first fan 6 is installed in the exhaust channel 3. Also installed in the exhaust channel 3 is a first formaldehyde detection sensor 8. To ensure detection accuracy, preferably, the first formaldehyde detection sensor 8 is located on the air inlet side of the first fan 6, meaning the airflow passes through the sensor before passing through the fan. This avoids the heat or electromagnetic interference that may be generated by the fan motor affecting the sensor's accuracy.

[0038] In a more optimized implementation, a second fan 7 and a second formaldehyde detection sensor 9 are also correspondingly provided in the air intake channel 4. The second fan 7, acting as an intake fan, works in conjunction with the first fan 6 to more actively and precisely control the airflow and velocity through the cavity. The second formaldehyde detection sensor 9 is located on the outlet side of the second fan 7, i.e., after the ambient air is drawn in by the second fan 7 and before entering the wood card placement cavity 2. Its purpose is to accurately measure the background formaldehyde concentration of the air entering the detection cavity. Because the air in the detection environment (e.g., indoors) may contain trace amounts of formaldehyde, if this background formaldehyde is not measured and compensated for, it will be superimposed on the formaldehyde released from the wood card and detected by the first formaldehyde detection sensor 8, causing a deviation in the results. With this setting, the main control unit can subtract the background reading measured by the second formaldehyde detection sensor 9 from the total reading of the first formaldehyde detection sensor 8 to obtain a difference. This difference accurately reflects the amount of formaldehyde released purely from the wood card sample itself, thereby completely eliminating the interference of ambient background formaldehyde and greatly improving the accuracy and reliability of the detection results.

[0039] To facilitate the placement of the wooden card and ensure proper airflow around it, a removable support 10 can be placed inside the wooden card placement cavity 2. The support 10 can be, for example, a mesh frame with perforations or grids, which supports the wooden card so that its bottom and top surfaces can fully contact the flowing air, thereby improving detection efficiency.

[0040] A weighing unit is integrated at the top of the device. This weighing unit specifically consists of a load cell 14 located inside or at the bottom of the main body 1 and a tray 15 mounted on top of the main body 1. The tray 15 is connected to the load cell 14 via a support structure. Before testing, the user can place a wooden card on the tray 15 for weighing.

[0041] All electronic components, including the first fan 6, the first formaldehyde detection sensor 8, the second fan 7, the second formaldehyde detection sensor 9, and the weighing unit, are electrically connected to a main control unit. For example... Figure 4 As shown, the main control unit can be integrated onto a circuit board 16 at the bottom of the main body 1. The main control unit is usually a microcontroller (MCU) or an embedded processor, which is the brain of the entire device, responsible for controlling the fan to start and stop, collecting and processing sensor data, and driving the display.

[0042] On the front panel of the device, there are also some human-machine interface elements. These include a power switch 13 for turning the device on and off, a display screen 12, and a fan speed adjustment switch 11. The display screen 12 can be an LCD or OLED screen, used to display information such as the detected formaldehyde concentration, background concentration, wood card weight, and detection time in real time. The fan speed adjustment switch 11 allows the user to manually adjust the fan speed according to different detection standards or sample sizes to change the air exchange rate inside the chamber.

[0043] The general workflow of the formaldehyde detector is as follows:

[0044] Press power switch 13 to start the device.

[0045] The wooden IC card to be tested is placed on the top tray 15, and the weighing unit measures its weight, which is then displayed on the screen 12.

[0046] Remove the wooden card, open the hatch 5, place the wooden card on the bracket 10 inside the wooden card placement cavity 2, and then close the hatch 5.

[0047] The detection program is started, and the main control unit controls the first fan 6 and the second fan 7 to start working, forming a stable airflow.

[0048] The second formaldehyde detection sensor 9 measures the background formaldehyde concentration of the air entering the cavity, while the first formaldehyde detection sensor 8 measures the total formaldehyde concentration of the air discharged after passing through the wooden card.

[0049] The main control unit collects data from two sensors and calculates the concentration difference, which is the net formaldehyde concentration released by the wood cardboard. Combined with the previously measured weight of the wood cardboard and the set airflow rate, the formaldehyde release rate per unit time and per unit mass can be calculated.

[0050] The final test results are displayed on screen 12.

[0051] In summary, this utility model, through its integrated design, cleverly combines a closed detection chamber, bidirectional airflow control, differential measurement, and sample weighing functions, providing an effective solution specifically for formaldehyde detection in small wooden samples.

[0052] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. A formaldehyde detector for wood caskets, characterized in that, include: The main body has a wooden card placement cavity, and an air intake channel and an exhaust channel respectively connected to the wooden card placement cavity; A hatch is closable and mounted on one side of the main body for opening and closing the wooden card placement cavity; A first fan is disposed in the exhaust channel to generate airflow from the wooden card placement cavity toward the exhaust channel; A first formaldehyde detection sensor is installed in the exhaust channel to detect the formaldehyde concentration of the gas discharged from the wooden card placement cavity; The weighing unit is located on the top of the main body; The main control unit is electrically connected to the first fan, the first formaldehyde detection sensor, and the weighing unit.

2. The formaldehyde detector for wood caskets according to claim 1, characterized in that: The air intake channel is equipped with a second fan and a second formaldehyde detection sensor, both of which are electrically connected to the main control unit; the second fan is used to generate airflow from the air intake channel toward the wooden card placement cavity.

3. The formaldehyde detector for wood caskets according to claim 2, characterized in that: The first formaldehyde detection sensor is located on the air inlet side of the first fan; and / or, the second formaldehyde detection sensor is located on the air outlet side of the second fan.

4. The formaldehyde detector for wood caskets according to claim 1, characterized in that: It also includes a bracket that can be detachably placed within the wooden card placement cavity.

5. The formaldehyde detector for wood cassettes according to claim 1, characterized in that: It also includes a fan speed adjustment switch, which is electrically connected to the main control unit and is used to adjust the speed of the first fan.

6. The formaldehyde detector for wood caskets according to claim 1, characterized in that: It also includes a display screen, which is electrically connected to the main control unit.

7. The formaldehyde detector for wood cassettes according to claim 1 or 2, characterized in that: The weighing unit includes a tray and a weighing sensor. The tray is disposed on top of the main body, and the weighing sensor is disposed between the main body and the tray.

8. The formaldehyde detector for wood cassettes according to claim 1 or 2, characterized in that: It also includes a power switch, which is electrically connected to the main control unit.

Images