Formaldehyde detection device

Abstract

The utility model discloses a formaldehyde detection device which comprises a collection box, an air exhaust mechanism and a supporting rod, a closed space is formed in the collection box, the collection box is provided with an opening communicated with the closed space, and the opening is used for covering a plane to be detected; the gas extraction mechanism comprises a gas collection bottle and a gas extraction assembly, gas collection liquid is contained in the gas collection bottle, the gas inlet end of the gas collection bottle is communicated with the closed space, the gas outlet end of the gas collection bottle is communicated with the gas inlet end of the gas extraction assembly, and the gas outlet end of the gas extraction assembly is communicated with the closed space; the supporting rod is located on the outer side of the collecting box, one end of the supporting rod is connected with the outer wall of the collecting box, and the other end of the supporting rod can abut against the ground. Formaldehyde gas released by the wall enters the closed space through the opening, the air exhaust set is controlled to enable the gas to pass through the gas collection liquid and not to exchange with external gas, and after a certain time, the gas collection liquid is detected and analyzed, so that the formaldehyde release amount of the wall in the open space is accurately measured.

Description

Technical Field

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

[0002] At present, in the field of on-site detection of indoor gas pollutant formaldehyde, the source of formaldehyde is mainly detected by portable formaldehyde detectors such as Interscan4160-2. The limitation of this method is that it can only detect objects with sealed spaces, such as indoors with closed doors and windows, wardrobes, bedside tables, desk drawers, etc. The formaldehyde release within a certain period of time is determined by detecting the formaldehyde concentration in the sealed space of the object. However, it is impossible to detect pollution sources in open spaces, such as walls, floors, etc.

[0003] In view of this, it is necessary to provide a new formaldehyde detection device to solve or at least alleviate the above technical defects. Utility Model Content

[0004] The main purpose of the utility model is to provide a formaldehyde detection device, aiming to solve the technical problem that the existing formaldehyde detector cannot accurately measure the formaldehyde on the wall or floor in the open space.

[0005] In order to achieve the above object, the utility model provides a formaldehyde detection device, the formaldehyde detection device comprising:

[0006] A collection box, wherein a closed space is formed in the collection box, and an opening communicating with the closed space is provided in the collection box, and the opening is used to cover at least a part of the area within the plane to be measured;

[0007] A gas extraction mechanism, the gas extraction mechanism is arranged outside the collection box, the gas extraction mechanism comprises a gas collection bottle and a gas extraction assembly, the gas collection bottle contains a gas collection liquid, the gas inlet end of the gas collection bottle is connected to the enclosed space, the gas outlet end of the gas collection bottle is connected to the gas inlet end of the gas extraction assembly, and the gas outlet end of the gas extraction assembly is connected to the enclosed space;

[0008] A support rod, wherein the support rod is located outside the collection box, one end of the support rod is connected to the outer wall of the collection box, and the other end of the support rod can abut against the ground, so that the support rod can press the side of the collection box where the opening is provided against the plane to be measured.

[0009] In one embodiment, the formaldehyde detection device further includes a heating mechanism, which is disposed in the enclosed space and is used to heat the gas in the enclosed space.

[0010] In one embodiment, the heating mechanism includes a first heating element and a temperature control unit electrically connected to the first heating element, and the temperature control unit can control the first heating element to be turned on or off according to the temperature in the enclosed space, so that the temperature in the enclosed space can be maintained within a preset temperature range.

[0011] In one embodiment, the heating mechanism further includes a second heating element, and the temperature control element is connected in series with the first heating element and the second heating element so that the temperature control element can control the opening or closing of the first heating element and the second heating element according to the temperature in the enclosed space.

[0012] In one embodiment, the first heating element is an infrared lamp, and the second heating element is a hot air blower.

[0013] In one embodiment, the formaldehyde detection device also includes a power supply component, which includes a plug and a wire, one end of the wire is electrically connected to the plug, and the other end of the wire is electrically connected to the temperature control unit, and the plug is used to be electrically connected to an external power supply.

[0014] In one embodiment, the collection box includes a box body and a sealing strip, the enclosed space is formed in the box body, the box body is provided with the opening, the sealing strip is arranged around the edge of the opening, and the support rod can press the sealing strip against the plane to be measured through the gravity of the collection box.

[0015] In one embodiment, the support rod includes a rod body and an anti-slip pad, one end of the rod body is connected to the outer wall of the collection box, the other end of the rod body is connected to the anti-slip pad, and the side of the anti-slip pad facing away from the rod body is used to abut against the ground.

[0016] In one embodiment, the support rod is a telescopic rod.

[0017] In one embodiment, the formaldehyde detection device further comprises a box cover, and the box cover is detachably connected to the collection box so that the box cover can cover or expose the opening.

[0018] In the above technical scheme of the utility model, when the plane to be measured is a wall, the opening of the collection box is directed toward the plane to be measured, and the collection box is moved so that the opening of the collection box is covered over at least a partial area within the plane to be measured and pressed against the area, and then the collection box is moved so that one end of the support rod is away from the collection box and presses against the ground. The collection box is affected by gravity and also by the reaction force of the wall pressed against by the collection box. These two forces are transmitted to the ground through the support rod, so the support rod will be affected by the reaction force from the ground, and the reaction force is used to balance the gravity of the collection box and the force of the wall on the collection box, so as to ensure that the side of the collection box with the opening is pressed against the wall, thereby ensuring that the enclosed space has A certain degree of sealing; the formaldehyde gas released from the wall will enter the enclosed space through the opening, and the vacuum assembly is controlled to extract the air in the enclosed space through the air inlet end of the gas collecting bottle. The air in the enclosed space enters the collection bottle from the air inlet end of the gas collecting bottle and contacts with the gas collecting liquid in the gas collecting bottle, and then enters the vacuum assembly from the air outlet end of the gas collecting bottle through the air inlet end of the vacuum assembly, and then returns to the enclosed space from the air outlet end of the vacuum assembly, so that the air in the enclosed space does not exchange with the outside gas. After the vacuum assembly has been working for a certain period of time, the gas collecting liquid is detected and analyzed, thereby realizing a more accurate measurement of the formaldehyde release of the walls in the open space. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the implementation mode of the utility model or the technical solution in the prior art, the drawings required for use in the implementation mode or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some implementation modes of the utility model. For ordinary technicians in this field, other drawings can be obtained by using the structures shown in these drawings without paying any creative work.

[0020] Figure 1 This is a schematic structural diagram of a formaldehyde detection device according to an embodiment of the present utility model.

[0021] Description of Figure Numbers:

[0022] 1 Formaldehyde detection device 11 Collection Box 111 Box body 1111 Opening 1112 Lock 1113 Confined Space 112 Sealing strip 12 Air extraction mechanism 121 Gas collection bottle 1211 Gas collecting liquid 122 Air extraction components 13 Support rod 131 Rod body 132 Anti-slip mat 14 Heating mechanism 141 First heating element 142 Second heating element 143 Temperature Control 15 Power Components 151 plug 152 electric wire 16 Box cover 161 Lock 2 Plane to be measured 3 ground

[0023] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with the implementation methods and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] In addition, in the present invention, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" can explicitly or implicitly include at least one of the features.

[0026] Furthermore, the technical solutions between the various implementation modes of the present invention can be combined with each other, but this must be based on the fact that ordinary technicians in the field can implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0027] The utility model provides a formaldehyde detection device 1. In one embodiment, Figure 1 As shown, the formaldehyde detection device 1 includes a collecting box 11, an exhaust mechanism 12 and a support rod 13. A closed space 1113 is formed in the collecting box 11. The collecting box 11 is provided with an opening 1111 connected to the closed space 1113. The opening 1111 is used to cover at least a part of the area in the plane 2 to be measured; the exhaust mechanism 12 is arranged outside the collecting box 11, and the exhaust mechanism 12 includes a gas collecting bottle 121 and an exhaust assembly 122. The gas collecting bottle 121 contains a gas collecting liquid 1211. The air inlet end of the gas collecting bottle 121 is connected to the enclosed space 1113, the air outlet end of the gas collecting bottle 121 is connected to the air inlet end of the vacuum assembly 122, and the air outlet end of the vacuum assembly 122 is connected to the enclosed space 1113; the support rod 13 is located on the outside of the collecting box 11, one end of the support rod 13 is connected to the outer wall of the collecting box 11, and the other end of the support rod 13 can abut against the ground 3, so that the support rod 13 can press the side of the collecting box 11 with the opening 1111 against the plane 2 to be measured.

[0028] Among them, when the plane 2 to be measured is a wall, the opening 1111 of the collection box 11 is directed toward the plane 2 to be measured, and the collection box 11 is moved so that the opening 1111 of the collection box 11 covers at least a partial area in the plane 2 to be measured and presses against the area, and then the collection box 11 is moved so that one end of the support rod 13 away from the collection box 11 presses against the ground 3. In addition to the action of gravity, the collection box 11 is also affected by the force of the wall pressed against by the collection box 11. These two forces are transmitted to the ground 3 through the support rod 13. Therefore, the support rod 13 will be affected by the reaction force from the ground 3, and the reaction force is used to balance the gravity of the collection box 11 and the force of the wall on the collection box 11, so as to ensure that the side of the collection box 11 with the opening 1111 is pressed against the wall, thereby ensuring that the enclosed space 1113 has a certain degree of sealing; the wall is released The formaldehyde gas will enter the enclosed space 1113 through the opening 1111, and the exhaust component 122 is controlled to extract the air in the enclosed space 1113 through the air inlet end of the gas collecting bottle 121. The air in the enclosed space 1113 enters the collection bottle from the air inlet end of the gas collecting bottle 121, and contacts with the gas collecting liquid 1211 in the gas collecting bottle 121, and then enters the exhaust component 122 from the air outlet end of the gas collecting bottle 121 through the air inlet end of the exhaust component 122, and then returns to the enclosed space 1113 from the air outlet end of the gas collecting bottle 121, so that the air in the enclosed space 1113 is not exchanged with the external gas. After the exhaust component 122 has been working for a certain period of time, the gas collecting liquid 1211 is detected and analyzed, thereby achieving a more accurate measurement of the formaldehyde release of the walls in the open space. It should be noted that when the side of the belt is the ground 3, the side with the opening 1111 can be directly oriented toward the ground 3, and the side with the opening 1111 of the collection box 11 can be pressed against the ground 3 by relying on the gravity of the collection box 11 itself. The end of the support rod 13 away from the collection box 11 can be suspended in the air or in contact with the wall, and the reaction force of the wall on the support rod 13 can be relied on to ensure the reliability of the side with the opening 1111 of the collection box 11 being pressed against the ground 3. It should also be noted that the detection of formaldehyde content by the gas collection liquid 1211 can be achieved by using existing technology. Generally, it is only necessary to add a color developing solution into the gas collection liquid 1211, and then detect the formaldehyde content by spectrophotometry.

[0029] According to an embodiment of the utility model, the vacuum assembly 122 includes a vacuum pump, the air inlet end of the vacuum pump is connected to the air outlet end of the gas collection bottle 121 through a rubber tube, and the air outlet end of the vacuum pump is connected to the enclosed space 1113 through a rubber tube.

[0030] In one embodiment, the formaldehyde detection device 1 further includes a heating mechanism 14, which is disposed in the confined space 1113, and the heating mechanism 14 is used to increase the formaldehyde release of the plane 2 to be measured located in the opening 1111. While the vacuum assembly 122 is evacuating, the heating mechanism 14 is controlled to heat the gas in the confined space 1113, thereby increasing the formaldehyde release in the area of ​​the plane 2 to be measured located in the opening 1111, thereby shortening the time spent on formaldehyde detection and improving the detection efficiency. It should be noted that by heating and collecting at the same time, the formaldehyde gas released into the confined space 1113 is continuously dissolved in the gas collection liquid 1211, thereby reducing the formaldehyde content in the confined space 1113, breaking the equilibrium of formaldehyde in the plane 2 to be measured (pollution source) and the air, and further increasing the formaldehyde release in the area of ​​the plane 2 to be measured located in the opening 1111.

[0031] In one embodiment, the heating mechanism 14 includes a first heating element 141 and a temperature control unit 143 electrically connected to the first heating element 141. The temperature control unit 143 can control the opening or closing of the first heating element 141 according to the temperature in the enclosed space 1113, so that the temperature in the enclosed space 1113 can be maintained within a preset temperature range. By setting the temperature control unit 143, when the temperature control unit 143 detects that the temperature in the enclosed space 1113 is lower than the preset temperature, the temperature control unit 143 controls the first heating element 141 to start heating; when the temperature control unit 143 detects that the temperature in the enclosed space 1113 is higher than the preset temperature, the temperature control unit 143 controls the first heating element 141 to close. By controlling the opening and closing of the first heating element 141, the temperature in the enclosed space 1113 can be maintained within a certain temperature range. It should be noted that the temperature control unit 143 includes a temperature control module and a timer module. The temperature control module is connected to the timer module in communication. The timer module is used to set the detection time. When the detection time is reached, the timer module sends a signal to the temperature control module, and the temperature control module controls the first heating element 141 to stop working. It should also be noted that the temperature control unit 143 also includes a display screen, which is used to display the temperature in the enclosed space 1113 detected by the temperature control module, so that the user can intuitively obtain the temperature information in the enclosed space 1113.

[0032] In one embodiment, the heating mechanism 14 further includes a second heating element 142, and a temperature control element 143 is connected in series with the first heating element 141 and the second heating element 142, so that the temperature control element 143 can control the opening or closing of the first heating element 141 and the second heating element 142 according to the temperature in the enclosed space 1113. By setting the second heating element 142 to work together with the first heating element 141, the heating efficiency of the heating mechanism 14 is effectively improved. It should be noted that the temperature control range of the temperature control element 143 is generally 0°C to 80°C.

[0033] In one embodiment, the first heating element 141 is an infrared lamp, and the second heating element 142 is a hot air blower. The infrared lamp is mainly used for heating, and the hot air blower can not only be used for heating, but also can make the temperature distribution in the closed space 1113 more uniform.

[0034] According to another embodiment of the present invention, the first heating element 141 is a hot air blower, and the second heating element 142 is an infrared lamp.

[0035] In one embodiment, the formaldehyde detection device 1 also includes a power supply assembly 15, and the power supply assembly 15 includes a plug 151 and a wire 152, one end of the wire 152 is electrically connected to the plug 151, and the other end of the wire 152 is electrically connected to the temperature control unit 143, and the plug 151 is used to be electrically connected to an external power supply. Through the plug 151 and the wire 152, the external power supply can supply power to the temperature control unit 143, the first heating element 141 and the second heating element 142. It should be noted that the external power supply is generally a 220V voltage. It should also be noted that the part of the wire 152 that passes through the collection box 11 is sealed to prevent the gas in the enclosed space 1113 from entering the external environment.

[0036] According to an embodiment of the present invention, the formaldehyde detection device 1 can also adopt a power supply mode of a built-in power supply, that is, a battery is arranged in the enclosed space 1113, and the battery supplies power to the temperature control unit 143, the first heating element 141 and the second heating element 142.

[0037] In one embodiment, the collection box 11 includes a box body 111 and a sealing strip 112, a closed space 1113 is formed in the box body 111, an opening 1111 is formed in the box body 111, the sealing strip 112 is arranged around the edge of the opening 1111, and the support rod 13 can press the sealing strip 112 against the plane to be measured 2 by the gravity of the collection box 11. By adding the sealing strip 112 around the opening 1111 and then pressing the sealing strip 112 against the plane to be measured 2, the sealing performance of the closed space 1113 is effectively improved.

[0038] In one embodiment, the support rod 13 includes a rod body 131 and an anti-skid pad 132. One end of the rod body 131 is connected to the outer wall of the collection box 11, and the other end of the rod body 131 is connected to the anti-skid pad 132. The side of the anti-skid pad 132 away from the rod body 131 is used to abut against the ground 3. By providing the anti-skid pad 132, the support rod 13 is not easy to slide relative to the ground 3, thereby improving the reliability of pressing the sealing strip 112 against the plane 2 to be measured.

[0039] In one embodiment, the support rod 13 is a telescopic rod. By adjusting the length of the telescopic rod, the pressure of the sealing strip 112 on the plane to be measured 2 can be adjusted.

[0040] According to an embodiment of the utility model, the telescopic rod includes a first rod body and a second rod body, and the connecting part of the first rod body and the second rod body is threadedly connected, that is, the second rod body is rotated relative to the first rod body to adjust the length of the telescopic rod. By adjusting the length of the telescopic rod, the pressure of the sealing strip 112 on the plane to be measured 2 can be adjusted.

[0041] According to another embodiment of the utility model, the telescopic rod includes a first rod body, a second rod body and a positioning pin. The first rod body and the second rod body are slidably matched. The first rod body and the second rod body are both hollow. The first rod body is provided with a plurality of first positioning holes, and the plurality of first positioning holes are arranged in sequence along the axial direction of the first rod body. The second rod body is provided with a plurality of second positioning holes, and the plurality of second positioning holes are arranged in sequence along the axial direction of the second rod body. Taking the first rod body as an example and the second rod body as an example, the positioning pin passes through a first positioning hole, and by moving the second rod body, the positioning pin can pass through different second positioning holes, thereby achieving the purpose of adjusting the length of the telescopic rod.

[0042] In one embodiment, the formaldehyde detection device 1 further comprises a box cover 16, which is detachably connected to the collection box 11, so that the box cover 16 can cover or expose the opening 1111. By providing the box cover 16 detachably connected to the collection box 11, the formaldehyde detection device 1 can also be used to detect the formaldehyde emission of an object of limited volume. By placing the object to be tested into the collection box 11, and then covering the box cover 16 for sealing, the subsequent process is similar to the process of detecting the formaldehyde emission of the wall, which will not be repeated here. The difference between the two is that the support rod 13 is not required to measure the formaldehyde emission of an object of limited volume, so the support rod 13 can be removed, that is, the support rod 13 is detachably connected to the collection box 11, wherein the support rod 13 is threadedly connected to the collection box 11. It should be noted that the box cover 16 and the collection box 11 are detachably connected through a lock buckle 161 and a lock head 1112, and the box cover 16 is provided with a lock buckle 161, and the collection box 11 is provided with a lock head 1112.

[0043] According to an embodiment of the utility model, the steps of using the formaldehyde detection device 1 are as follows: (1) when measuring the formaldehyde emission of a certain area in the plane 2 to be measured, the box cover 16 is opened, and the side of the collection box 11 provided with the opening 1111 is pressed against the plane 2 to be measured; and when measuring the formaldehyde emission of a certain object of limited volume, the object to be measured is placed in the collection box 11, and then the box cover 16 covers the opening 1111, and the box cover 16 is locked by the cooperation of the lock buckle 161 and the lock head 1112; (2) the gas collection bottle is placed in the collection box 11; The air inlet of 121 is extended into the enclosed space 1113 through the rubber tube through the wall of the collection box 11, and the rubber tube of the air outlet of the vacuum pump is extended into the enclosed space 1113 through the wall of the collection box 11; (3) Connect the plug 151 to the external power supply, adjust the starting and stopping temperatures of the temperature control unit 143, and control the start of the hot air blower and the infrared lamp; (4) Turn on the switch of the vacuum pump; (5) The sealing strip 112 is pressed against the plane 2 to be measured, and check whether the sealing of the enclosed space 1113 is good. It should be noted that the sealing of the wire 152 at the point where it passes through the collection box 11 must be ensured to be good, and the temperature control unit 143 is provided with a temperature sensing probe, and the sealing of the opening 1111 where the probe enters the collection box 11 must be ensured to be good; the sealing of the connection between the rubber tube and the collection box 11 must also be ensured to be good.

[0044] The above are only preferred implementations of the utility model, and do not limit the patent scope of the utility model. All equivalent structural changes made based on the concept of the utility model and the contents of the description and drawings of the utility model, or direct / indirect application in other related technical fields are included in the patent protection scope of the utility model.

Claims

1. A formaldehyde detection device, characterized in that: include: A collection box, wherein a closed space is formed in the collection box, and an opening communicating with the closed space is provided in the collection box, and the opening is used to cover at least a part of the area within the plane to be measured; A gas extraction mechanism, the gas extraction mechanism is arranged outside the collection box, the gas extraction mechanism comprises a gas collection bottle and a gas extraction assembly, the gas collection bottle contains a gas collection liquid, the gas inlet end of the gas collection bottle is connected to the enclosed space, the gas outlet end of the gas collection bottle is connected to the gas inlet end of the gas extraction assembly, and the gas outlet end of the gas extraction assembly is connected to the enclosed space; A support rod, wherein the support rod is located outside the collection box, one end of the support rod is connected to the outer wall of the collection box, and the other end of the support rod can abut against the ground, so that the support rod can press the side of the collection box where the opening is provided against the plane to be measured.

2. The formaldehyde detection device according to claim 1, characterized in that: The formaldehyde detection device further comprises a heating mechanism, which is disposed in the enclosed space and is used to increase the formaldehyde release of the plane to be detected located in the opening.

3. The formaldehyde detection device according to claim 2, characterized in that: The heating mechanism includes a first heating element and a temperature control unit electrically connected to the first heating element, and the temperature control unit can control the first heating element to be turned on or off according to the temperature in the enclosed space so that the temperature in the enclosed space can be maintained within a preset temperature range.

4. The formaldehyde detection device according to claim 3, characterized in that: The heating mechanism also includes a second heating element, and the temperature control element is connected in series with the first heating element and the second heating element so that the temperature control element can control the first heating element and the second heating element to be turned on or off according to the temperature in the enclosed space.

5. The formaldehyde detection device according to claim 4, characterized in that: The first heating element is an infrared lamp, and the second heating element is a hot air blower.

6. The formaldehyde detection device according to claim 3, characterized in that: The formaldehyde detection device also includes a power supply component, which includes a plug and a wire, one end of the wire is electrically connected to the plug, and the other end of the wire is electrically connected to the temperature control unit, and the plug is used to be electrically connected to an external power supply.

7. The formaldehyde detection device according to any one of claims 1 to 6, characterized in that: The collection box includes a box body and a sealing strip, the enclosed space is formed in the box body, the box body is provided with the opening, the sealing strip is arranged around the edge of the opening, and the support rod can press the sealing strip against the plane to be measured through the gravity of the collection box.

8. The formaldehyde detection device according to any one of claims 1 to 6, characterized in that: The support rod includes a rod body and an anti-skid pad, one end of the rod body is connected to the outer wall of the collection box, the other end of the rod body is connected to the anti-skid pad, and the side of the anti-skid pad away from the rod body is used to abut against the ground.

9. The formaldehyde detection device according to any one of claims 1 to 6, characterized in that: The support rod is a telescopic rod.

10. The formaldehyde detection device according to any one of claims 1 to 6, characterized in that: The formaldehyde detection device further comprises a box cover, which is detachably connected to the collection box so that the box cover can cover or expose the opening.

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