Device for measuring content of harmful gas in indoor air field

Abstract

The utility model relates to the technical field of air quality detection, and discloses an indoor air field harmful gas content measuring device which comprises a detector body, an air inlet arranged at one end of the detector body, an exhaust port arranged at the other end of the detector body and an exhaust fan arranged in the exhaust port. A mounting seat is arranged in the air inlet, a guide rod is arranged on the mounting seat, a sealing plug is arranged on the top face of the guide rod, a guide seat is further arranged on the guide rod in a sliding mode, a barrel is arranged on the guide seat, a barrel seat blocked by the sealing plug is arranged on the top face of the barrel, and a piston body attached to the inner wall of the air outlet is fixedly arranged on the outer wall of the barrel seat. And a flow guide assembly for uniformly distributing gas is arranged on the bottom surface of the gas inlet. According to the utility model, residual air in the detector body can be exhausted during detection, so that the phenomenon of cross contamination of indoor detected air and air in the detector body is avoided, and the accuracy of determining the content of harmful gas in the indoor air is ensured.

Description

TECHNICAL FIELD

[0001] The utility model relates to air quality detection technical field, specifically point to a kind of indoor air field harmful gas content determination device. BACKGROUND

[0002] Indoor air refers to the air in the interior space of a building, and the quality of indoor air directly affects the health of people who are in the room for a long time. By determining the content of harmful gases in indoor air on site, the quality of the air can be judged. Currently, when determining harmful gases in indoor air on site, a handheld detector is usually used.

[0003] The existing handheld detector usually includes an upper shell and a lower shell that cooperate with each other and form a sealed space. An air inlet and an air outlet are respectively formed on the top surface and the bottom surface of the detector body. A detection module is arranged inside. The detection module includes a circuit board and an electrochemical sensor connected to the circuit board for detecting harmful gases. A display screen and a button connected to the circuit board are nested on the upper shell. When determining the content of harmful gases in indoor air, the detector body is taken to the indoor space to be measured and started. The air in the room flows into the detector body from the air inlet in a natural flow manner and is then discharged from the air outlet. When the air flows in the detector body, it contacts and senses the electrochemical sensor. The measured value of the sensor is displayed on the display screen.

[0004] When determining the content of harmful gases in indoor air using the above-mentioned handheld detector, the residual gas in the detector body from the last detection cannot be removed. When the air in the room enters the detector body, cross contamination is easily caused, which affects the accuracy of determining the content of harmful gases in indoor air. INVENTION CONTENTS

[0005] The technical problem to be solved by the utility model is to overcome the above-mentioned difficulties and provide a device for determining the content of harmful gases in indoor air on site.

[0006] To solve the above-mentioned technical problem, the utility model provides the following technical scheme: a device for determining the content of harmful gases in indoor air on site includes a detector body, an air inlet arranged at one end of the detector body, an air outlet arranged at the other end of the detector body and provided with an exhaust fan, a mounting seat fixedly arranged in the air inlet and provided with a guide rod fixedly arranged on the mounting seat, a sealing plug arranged on the top surface of the guide rod, a guide seat slidably arranged on the guide rod, a cylinder arranged on the guide seat, a cylinder seat arranged on the top surface of the cylinder and sealed by the sealing plug, a piston body fixedly arranged on the outer wall of the cylinder seat and abutting against the inner wall of the air inlet, and a return spring one sleeved on the guide rod between the guide seat and the mounting seat.

[0007] The bottom surface of the air inlet is provided with a flow guide assembly for uniformly distributing the gas, and the bottom surface of the air outlet is provided with an adjusting assembly for opening or closing the air outlet.

[0008] As an improvement, the flow guide assembly comprises a flow guide cover fixed on the bottom surface of the air inlet, the flow guide cover comprises arc-shaped cover bodies symmetrically arranged at both ends of the air inlet in an inclined state, a through slot is formed in the air inlet and penetrates the arc-shaped cover bodies, a sealing plate is arranged between each arc-shaped cover body and the air inlet, a dispersion plate is arranged on the bottom surface of the flow guide cover, and a plurality of air outlet holes are equidistantly formed in the dispersion plate.

[0009] As an improvement, the adjusting assembly comprises a cover body hingedly connected to one end of the detector body and covering the air outlet, a plug body is fixedly arranged on the inner wall of the cover body and extends into the air outlet, and the other end of the detector body is provided with a fixing assembly for positioning the cover body.

[0010] As an improvement, the fixing assembly comprises a fixing seat fixedly arranged on the cover body and away from the hinge seat, a U-shaped frame is arranged on the detector body and surrounds the fixing seat, a positioning pin with a rebound function is slidingly arranged in the U-shaped frame, a pin hole is formed in the fixing seat and extends into the positioning pin, and a pressing assembly is arranged on the U-shaped frame and controls the sliding of the positioning pin.

[0011] As an improvement, the pressing assembly comprises a support frame fixedly arranged on the U-shaped frame, a pressing rod is slidingly arranged in the support frame, a swing rod is hingedly connected between the pressing rod and the positioning pin, the cover body is hingedly connected to the detector body through a rotating shaft, and a torsional spring is sleeved on the rotating shaft.

[0012] As an improvement, the sealing plug is of a conical structure, and a conical hole is formed in the cylinder seat and matched with the conical structure.

[0013] The beneficial effects of the utility model compared with the prior art are as follows:

[0014] 1. Under the cooperation of the exhaust fan arranged in the air outlet, the mounting seat, the guide rod, the sealing plug, the guide seat, the cylinder body, the cylinder seat and the piston body arranged in the air inlet, the exhaust fan can be started to exhaust and remove all residual gas in the detector body, at this time, negative pressure is formed in the detector body, under the action of the negative pressure, the piston body is driven to slide downward in the air inlet, the cylinder body is driven to slide downward and separate from the sealing plug, and the air inlet is opened, at this time, external air enters the detector body and contacts and senses the electrochemical sensor on the detection module, thereby avoiding cross contamination of indoor air and air in the detector body and ensuring the accuracy of the determination of the harmful gas content in indoor air.

[0015] 2、The air entering the air inlet can be evenly distributed to the inside of the detector body under the action of the arranged flow guide assembly, so that the effective contact of the detected air and the electrochemical sensor is improved;

[0016] 3、The exhaust port can be closed under the action of the arranged adjusting assembly for opening and closing the exhaust port, so that the phenomenon that the external air and dust enter the detector body from the exhaust port is avoided. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 is a structural schematic diagram of the utility model.

[0018] Figure 2 is a structural schematic diagram of the utility model in a test state.

[0019] Figure 3 is a split structure diagram of the utility model.

[0020] Figure 4 is a schematic diagram of the internal structure of the utility model.

[0021] Figure 5 is a structural schematic diagram of the flow guide assembly in the utility model.

[0022] Figure 6 is a schematic diagram of the internal structure of the air inlet and the flow guide assembly.

[0023] Figure 7 is a structural schematic diagram of the fixing assembly and the pressing assembly in the utility model.

[0024] Figure 8 is a schematic diagram of the internal structure of the fixing assembly and the pressing assembly.

[0025] As shown in the figure: 1, detector body; 111, upper shell; 112, lower shell; 113, air inlet; 114, detection module; 2, exhaust port; 211, exhaust fan; 311, mounting seat; 312, guide rod; 313, sealing plug; 314, guide seat; 315, cylinder; 316, cylinder seat; 317, piston body; 318, reset spring one; 4, flow guide assembly; 41, flow guide cover; 411, arc cover body; 412, through slot; 413, sealing plate; 42, dispersion plate; 43, air outlet hole; 5, adjusting assembly; 511, cover body; 512, plug body; 6, fixing assembly; 611, fixing seat; 612, U-shaped frame; 613, positioning pin; 7, pressing assembly; 711, support frame; 712, pressing rod; 713, swing rod; 714, limiting seat; 715, reset spring two; 716, cover plate. DETAILED DESCRIPTION

[0026] The utility model discloses make further detailed instructions below with the drawings.

[0027] Combining the drawings Figure 1 , the drawings Figure 2 , the drawings Figure 3 , the drawings Figure 4 , the drawings Figure 5 and the drawings Figure 6 As shown in the drawings, an indoor air field harmful gas content measuring device, including detector body 1, the air inlet 113 of setting in the one end of detector body 1, detector body 1 includes the upper casing 111 and lower casing 112 of mutually cooperating and forming sealed space, is equipped with detection module 114 in sealed space, the other end of detector body 1 is equipped with exhaust port 2 and is equipped with exhaust fan 211 in this exhaust port 2, the mounting seat 311 of being fixed through support rod one is equipped with in air inlet 113, the top surface of mounting seat 311 is fixedly equipped with guide rod 312, the top surface of guide rod 312 is equipped with sealing plug 313, guide seat 314 is also slidably equipped on guide rod 312, the cylinder 315 of being fixed through support rod two is equipped on guide seat 314, the cylinder seat 316 of being blocked by sealing plug 313 is equipped on the top surface of cylinder 315, sealing plug 313 is conical structure, the taper hole of being adapted with conical structure is opened in cylinder seat 316 and cylinder seat 316 is through this taper hole and cylinder 315 and is penetrated, the piston body 317 of being fixedly equipped with the inner wall of cylinder seat 316 and the inner wall of air inlet 113 is pasted, and sealing plug 313, cylinder seat 316 and piston body 317 distribution and the top surface of air inlet 113 flush setting, the reset spring one 318 of being sleeved has on the guide rod 312 between guide seat 314 and mounting seat 311;

[0028] In order to make the air that enters into air inlet 113 evenly distributes to detector body 1, the flow guide assembly 4 that makes gas evenly distributes is equipped on the bottom surface of air inlet 113, in order to avoid the phenomenon that dust enters from exhaust port 2 when not using detector body 1, the adjusting assembly 5 that opens or closes is equipped on the bottom surface of exhaust port 2.

[0029] Through the above structure, when the harmful content of indoor air needs to be tested, the staff will take the detector body 1 to the indoor to be tested, first open the exhaust port 2 through the adjusting assembly 5, start the exhaust fan 211, and exhaust all the residual air in the detector body 1 to the outside, at this time, negative pressure will be formed in the detector body 1, which will drive the piston body 317 to slide downward, and at the same time drive the cylinder seat 316 to slide downward and separate from the sealing plug 313, at this time, the external air will enter the cylinder 315 from the tapered hole, then enter the air inlet 113, and then the air will be evenly distributed in the detector body 1 through the flow guide assembly 4, which can improve the effective contact between the detected air and the electrochemical sensor, thereby avoiding cross contamination between the indoor air and the air in the detector body 1 during the entire detection process, and ensuring the accuracy of the determination of the harmful gas content in the indoor air.

[0030] Combining the drawings Figure 5 and the drawings Figure 6 As shown, the flow guide assembly 4 includes a flow guide cover 41 fixedly arranged on the bottom surface of the air inlet 113, the flow guide cover 41 includes arc-shaped cover bodies 411 arranged in an inclined state at both ends of the air inlet 113, the air inlet 113 is provided with through grooves 412 penetrating the arc-shaped cover bodies 411, and sealing plates 413 are arranged between the left and right ends of each arc-shaped cover body 411 and the air inlet 113 to seal them, and a dispersion plate 42 is fixedly arranged on the bottom surface of the flow guide cover 41, and a plurality of air outlet holes 43 are equidistantly arranged on the dispersion plate 42, under the cooperation of the arc-shaped cover bodies 411, the through grooves 412, the sealing plates 413, the dispersion plate 42 and the air outlet holes 43, the air entering the air inlet 113 can be dispersed and guided outward and evenly distributed into the detector body 1.

[0031] Combining the drawings Figure 2 , the drawings Figure 3 , the drawings Figure 7 and the drawings Figure 8 As shown, the adjusting assembly 5 includes a cover body 511 hingedly connected to the lower shell 112 and covering the exhaust port 2, a plug body 512 is fixedly arranged on the inner wall of the cover body 511 and extends into the exhaust port 2, the upper shell 111 is provided with a fixing assembly 6 for positioning the cover body 511, the fixing assembly 6 includes a fixing seat 611 fixedly arranged on the cover body 511 and away from the hinge seat, the upper shell 111 is provided with a U-shaped frame 612 surrounding the fixing seat 611, the U-shaped frame 612 is slidably provided with a positioning pin 613 having a rebound function, the fixing seat 611 is provided with a pin hole for the positioning pin 613 to extend into, and the U-shaped frame 612 is provided with a pressing assembly 7 for controlling the sliding of the positioning pin 613.

[0032] The pressing assembly 7 comprises a support frame 711 fixedly arranged on the U-shaped frame 612 and in L-shaped structure, a pressing rod 712 slidingly arranged on the support frame 711, a swing rod 713 hingedly connected between the pressing rod 712 and the positioning pin 613, a limiting seat 714 arranged on the top surface of the pressing rod 712, a second reset spring 715 sleeved on the pressing rod 712 between the limiting seat 714 and the support frame 711, and a cover 511 hingedly connected to the lower shell 112 through a rotating shaft and sleeved with a torsion spring on the rotating shaft, and cover plates 716 are arranged at the two ends of the top surface of the U-shaped frame 612 and the support frame 711.

[0033] The working principle of the open exhaust port 2 is as follows: in the initial state, the exhaust port 2 is in a closed state, one hand of a worker holds the detector body 1, and the other hand presses the pressing rod 712 downward to slide downward, at this time, the positioning pin 613 is driven to slide backward and separated from the pin hole under the action of the hinged swing rod 713, the positioning of the fixed seat 611 and the cover 511 is released, and the cover 511 is automatically swung downward to open the exhaust port 2 under the action of the torsion spring.

[0034] When it is necessary to test the harmful content of indoor air, the worker takes the detector body 1 to the indoor to be tested, first presses the pressing rod 712 downward to slide downward, drives the positioning pin 613 to separate from the pin hole, opens the exhaust port 2, starts the exhaust fan 211, and exhausts all residual air in the detector body 1 to the outside, at this time, negative pressure is formed in the detector body 1, the piston body 317 is driven to slide downward under the action of the negative pressure, the cylinder seat 316 is driven to slide downward and separated from the sealing plug 313, at this time, the air outside enters the cylinder 315 through the tapered hole, then enters the air inlet 113, and then is uniformly distributed in the detector body 1 through the flow guide assembly 4, so that the effective contact of the detected air and the electrochemical sensor is improved, and cross contamination of the air in the indoor and the air in the detector body 1 is avoided in the whole detection process, and the accuracy of the determination of the harmful gas content of the indoor air is ensured.

[0035] The above describes the utility model and its implementation mode, which is not limited, and the drawings only show one of the implementation modes of the utility model, and the actual structure is not limited thereto. In summary, if a person skilled in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structure modes and embodiments are designed without creativity, which should belong to the protection scope of the utility model.

Claims

1. A device for measuring harmful gas content in indoor air, comprising a detector body (1), an air inlet (113) arranged at one end of the detector body (1), characterized in that: The detection instrument body (1) is provided with an exhaust port (2) at the other end, and an exhaust fan (211) is arranged in the exhaust port (2); the air inlet (113) is fixedly provided with a mounting seat (311), and a guide rod (312) is fixedly arranged on the mounting seat (311); the top surface of the guide rod (312) is provided with a sealing plug (313); a guide seat (314) is slidably arranged on the guide rod (312); the guide seat (314) is provided with a cylinder (315); the top surface of the cylinder (315) is provided with a cylinder seat (316) blocked by the sealing plug (313); the outer wall of the cylinder seat (316) is fixedly provided with a piston body (317) abutting against the inner wall of the air inlet (113); and a reset spring (318) is sleeved on the guide rod (312) between the guide seat (314) and the mounting seat (311). A guide assembly (4) for uniformly distributing gas is arranged on the bottom surface of the air inlet (113), and an adjusting assembly (5) for opening or closing the exhaust port (2) is arranged on the bottom surface of the exhaust port (2).

2. The indoor air on-site harmful gas content measuring device according to claim 1, characterized in that: The guide assembly (4) comprises a guide cover (41) fixedly arranged on the bottom surface of the air inlet (113); the guide cover (41) comprises arc-shaped cover bodies (411) symmetrically arranged at both ends of the air inlet (113) and distributed in an inclined state; through grooves (412) penetrating through the arc-shaped cover bodies (411) are formed in the air inlet (113); sealing plates (413) are arranged between each arc-shaped cover body (411) and the air inlet (113); and a dispersion plate (42) is arranged on the bottom surface of the guide cover (41), and a plurality of air outlet holes (43) are equidistantly formed in the dispersion plate (42).

3. The device for measuring the content of harmful gases in indoor air according to claim 1, characterized in that: The adjusting assembly (5) comprises a cover body (511) hingedly connected to one end of the detection instrument body (1) and covering the exhaust port (2); the inner wall of the cover body (511) is fixedly provided with a plug body (512) extending into the exhaust port (2); and the other end of the detection instrument body (1) is provided with a fixing assembly (6) for positioning the cover body (511).

4. The device for measuring the content of harmful gases in indoor air according to claim 3, characterized in that: The fixing assembly (6) comprises a fixing seat (611) fixedly arranged on the cover body (511) and away from the hinge seat; a U-shaped frame (612) surrounding the fixing seat (611) is arranged on the detection instrument body (1); a positioning pin (613) having a rebound function is slidably arranged on the U-shaped frame (612); a pin hole into which the positioning pin (613) extends is formed in the fixing seat (611); and a pressing assembly (7) for controlling the sliding of the positioning pin (613) is arranged on the U-shaped frame (612).

5. The apparatus for determining the amount of harmful gases in the indoor air according to claim 4, characterized in that: The pressing assembly (7) comprises a support frame (711) fixedly arranged on the U-shaped frame (612); a pressing rod (712) is slidably arranged on the support frame (711); a swing rod (713) is hingedly connected between the pressing rod (712) and the positioning pin (613); and the cover body (511) is hingedly connected to the detection instrument body (1) through a rotating shaft, and a torsional spring is sleeved on the rotating shaft.

6. The device of claim 1, wherein: The sealing plug (313) is of a conical structure, and a tapered hole is formed in the cylinder seat (316) and matched with the conical structure.

Images