Variable air volume ventilation mechanism for laboratory

Abstract

The utility model relates to the technical field of laboratory ventilation, in particular to a laboratory variable air volume ventilation mechanism which comprises a ventilation pipe, the ventilation pipe is used for being connected with the air inlet end of an exhaust fan, a plurality of air suction pipes are arranged at the bottom of the ventilation pipe, a plurality of air inlet heads are arranged at the bottom of the ventilation pipe, and negative pressure can be generated in the ventilation pipe when the exhaust fan exhausts air. The sealing plug retracts into the air inlet head and is separated from the sealing ring due to the influence of negative pressure in the air inlet head, so that the air inlet head is opened for air suction, and for an area where extra air can be generated during an experiment, a telescopic pipe can be extracted from an air suction pipe, so that the telescopic pipe is separated from an abutting magnetic suction block, and the telescopic pipe is communicated with a ventilation pipe; and at the moment, the tension of the first spring overcomes the negative pressure of the ventilation pipe, the sealing plug is pushed to abut against the sealing ring, the air inlet head is closed, the suction force of the telescopic pipe is increased, and gas generated in the experiment area is conveniently and intensively absorbed.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of laboratory ventilation, in particular to a variable air volume ventilation mechanism for laboratory. BACKGROUND

[0002] With the continuous development of science and technology, more and more high-standard modern laboratories, as modern laboratories, have certain requirements for indoor temperature, humidity control, room pressure difference and ventilation. In order to create a safe and comfortable experimental environment and ensure the physical and mental health of experimental personnel, the design of the ventilation system of the laboratory is particularly important. Most laboratory ventilation systems use exhaust ducts to connect various exhaust cabinets, thereby replacing the air in the laboratory with fresh air from the outside to improve the air quality in the laboratory. Currently, before performing an experiment, a staff member manually opens the ventilation equipment at the top of the exhaust cabinet. At this time, the ventilation speed of the ventilation equipment is completely controlled by the staff member. However, the amount of harmful gas generated during the experimental operation process cannot be estimated. If the ventilation equipment still maintains a low ventilation speed, the likelihood of poisoning of the staff member increases.

[0003] The prior art, such as the patent publication CN216924648U, provides a variable air volume ventilation mechanism for laboratory, which includes an air inlet duct and an exhaust duct. The exhaust duct is fixedly connected to multiple groups of ventilation mechanisms. The ventilation mechanism includes a ventilation arm and a ventilation cover connected to each other. The ventilation arm is rotatable through a rotating member. The rotating member includes a first rotating part and a second rotating part. The first rotating part is provided with a rotating opening. The second rotating part extends to the inside of the first rotating part through the rotating opening. The side wall of the second rotating part is fixedly connected to the side wall of the first rotating part through a bolt and a nut. The second rotating part is provided with a ventilation opening. Through the rotatable ventilation arm, the ventilation function of a single experimental position can be realized, avoiding the work of the entire ventilation system of the laboratory and greatly reducing power consumption. For the ventilation mechanism of a single experimental position, the structure is designed in a detachable manner, facilitating the disassembly and cleaning of stains inside the structure and avoiding the accumulation of stains affecting the physical and mental health of experimental personnel.

[0004] In this scheme, the air inlet can be adjusted locally to absorb the generated gas specifically, thereby eliminating the need to open the entire ventilation system of the laboratory during the experimental operation process. In fact, only the position near the experimental position needs to be exhausted, and the other positions in the laboratory do not need to be exhausted, which causes the problem of energy waste of the ventilation system. However, since the ventilation mechanism is independent of the original air circulation system of the classroom, it undoubtedly increases the use cost of the classroom and has poor economic efficiency. In view of this, we propose a variable air volume ventilation mechanism for laboratory. UTILITY MODEL CONTENTS

[0005] The utility model discloses a laboratory variable air volume ventilation mechanism, which solves the problem of energy waste of the ventilation system during the operation of the operator in the experimental operation process.

[0006] To achieve the above object, the utility model provides the following technical scheme.

[0007] A laboratory variable air volume ventilation mechanism, including ventilation pipe, the ventilation pipe is used for connecting the air inlet end of the air extractor, the bottom of ventilation pipe is provided with a plurality of suction pipes, should be according to the actual need of laboratory central suction position arrangement, the bottom of ventilation pipe is provided with a plurality of air inlet head, should cover laboratory comprehensively;

[0008] The inner wall of the suction pipe is slidably connected with an extension pipe, the top of the inner wall of the ventilation pipe is fixedly connected with a magnetic suction block corresponding to the position of the extension pipe, for magnetically adsorbing the extension pipe.

[0009] The bottom of the air inlet head is fixedly connected with a sealing ring, the inside of the air inlet head is provided with a sealing plug above the sealing ring for cooperating with the sealing ring, the inside of the air inlet head is fixedly connected with a supporting ring above the sealing plug, and the supporting ring is fixedly connected with the sealing plug and the first spring.

[0010] Preferably, the inner wall of the supporting ring is slidably connected with a sliding rod, the sliding rod is fixedly connected with the sealing plug, and the first spring is movably sleeved on the outer wall of the sliding rod.

[0011] Preferably, the abutting surface of the sealing plug and the sealing ring is provided in a conical surface, and the bottom of the sealing ring is fixedly connected with a first filter plate.

[0012] Preferably, the bottom of the sealing plug is fixedly connected with a dredging head, the dredging head is composed of a plurality of thin needles, and each thin needle corresponds to the aperture of the first filter plate.

[0013] Preferably, the top of the extension pipe is provided with a ring groove, the inner wall of the ring groove is slidably connected with a sliding ring, and the position between the ring groove and the sliding ring is fixedly connected with a second spring.

[0014] Preferably, the bottom of the extension pipe is fixedly connected with a suction cover, the inner wall of the suction cover is provided with an air inlet, and the air inlet is provided in a flat disc shape.

[0015] Preferably, the top of the suction cover is fixedly connected with a second filter plate for filtering impurities in the air.

[0016] Through the above technical scheme, the utility model provides a laboratory variable air volume ventilation mechanism. At least the following beneficial effects are possessed:

[0017] One, the utility model discloses the inside of the ventilation pipe can produce negative pressure when the air extractor carries out air extraction, makes the sealing plug retract inside the air inlet head under the influence of negative pressure, and separates with the sealing ring, makes the air inlet head open and inhales, because the air inlet head can be distributed on the ventilation pipe according to the actual experiment's size situation, makes the air inlet head cover the inside of laboratory comprehensively, avoids the dead angle of laboratory in the air circulation process, the gas of partial area can not carry out effective circulation, and for the area of the additional gas produced when carrying out the experiment, then can draw out the telescopic pipe from the air suction pipe, makes the telescopic pipe separate with the abutment magnetic attraction piece, makes the telescopic pipe communicate with the ventilation pipe, because the telescopic pipe communicates with the ventilation pipe, makes the pressure in the ventilation pipe rise, at this moment, the tension of first spring overcomes the negative pressure of ventilation pipe, pushes the sealing plug against the sealing ring, makes the air inlet head close, makes the suction of telescopic pipe bigger, to facilitate the gas produced in the experimental area to concentrate absorption, to reach the purpose of self -adaptation regulation suction volume.

[0018] Two, the utility model discloses the mode that sets up the first filter plate at the through -hole of sealing ring, can filter the impurity in the air, avoids the impurity gathering in the pipeline, influences the service life of pipeline and the ventilation effect, and the mode that sets up dredging head at the bottom of sealing plug makes the sealing plug close, all will dredge the aperture on the first filter plate, avoids the situation of blockage, the mode that sets up the air suction cover at the bottom of telescopic pipe and sets up the air inlet of flat disc shape on the inner wall of air suction cover can increase the coverage range of air suction, and will not influence the air intake, and the second filter plate set up on the top of air suction cover can filter the impurity in the air, avoids the impurity gathering in the pipeline, influences the service life of pipeline and the ventilation effect. BRIEF DESCRIPTION OF DRAWINGS

[0019] The drawings explained here are used to provide further understanding of the utility model and constitute a part of this application:

[0020] Figure 1 It is the whole structure schematic diagram of the utility model;

[0021] Figure 2 It is the internal structure schematic diagram of the air inlet head in the utility model;

[0022] Figure 3 It is the internal structure schematic diagram of the air suction pipe in the utility model;

[0023] Figure 4 It is the structure schematic diagram of the magnetic attraction piece area in the utility model; Figure 3

[0024] Figure 5 It is the structure schematic diagram of the magnetic attraction piece area in the utility model; Figure 3 ​A schematic structural view of the air suction cover area.

[0025] In the figure: 1, ventilation pipe; 2, air suction pipe; 21, telescopic pipe; 211, ring groove; 212, sliding ring; 213, second spring; 22, air suction cover; 221, air inlet; 222, second filter plate; 23, magnetic suction block; 3, air inlet head; 31, sealing ring; 32, sealing plug; 33, support ring; 34, first spring; 35, sliding rod; 36, first filter plate; 37, dredging head. DETAILED DESCRIPTION

[0026] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0027] A laboratory variable air volume ventilation mechanism, as shown in Figure 1 - Figure 5 The ventilation pipe 1 is used for connecting the air inlet end of the air extractor, the bottom of the ventilation pipe 1 is provided with a plurality of air suction pipes 2, and the positions of the air suction pipes 2 should be arranged according to the actual needs of the laboratory for centralized air extraction. The bottom of the ventilation pipe 1 is provided with a plurality of air inlet heads 3, which should cover the laboratory comprehensively. The inner wall of the air suction pipe 2 is slidably connected with the telescopic pipe 21, the top of the inner wall of the ventilation pipe 1 is fixedly connected with the magnetic suction block 23 corresponding to the position of the telescopic pipe 21, which is used for magnetically adsorbing the telescopic pipe 21. The bottom of the air inlet head 3 is fixedly connected with the sealing ring 31, the inside of the air inlet head 3 is provided with the sealing plug 32 above the sealing ring 31, which is used for cooperating with the sealing ring 31. The inside of the air inlet head 3 is fixedly connected with the support ring 33 above the sealing plug 32, the first spring 34 is fixedly connected between the support ring 33 and the sealing plug 32. The inner wall of the support ring 33 is slidably connected with the sliding rod 35, the sliding rod 35 is fixedly connected with the sealing plug 32, and the first spring 34 is movably sleeved on the outer wall of the sliding rod 35.

[0028] In this embodiment, when the air extractor is extracting air, negative pressure will be generated inside the ventilation pipe 1, causing the sealing plug 32 inside the air inlet head 3 to retract due to the influence of negative pressure and separate from the sealing ring 31, so that the air inlet head 3 is opened to inhale air. Since the air inlet head 3 can be reasonably distributed on the ventilation pipe 1 according to the actual experimental size, the air inlet head 3 can fully cover the inside of the laboratory, avoiding the occurrence of dead angles in the laboratory during air circulation, and the gas in some areas cannot be effectively circulated. However, for the area where additional gas is generated during the experiment, the telescopic pipe 21 can be pulled out from the air suction pipe 2 to separate the telescopic pipe 21 from the abutting magnetic block 23, so that the telescopic pipe 21 is in communication with the ventilation pipe 1. Since the telescopic pipe 21 is in communication with the ventilation pipe 1, the pressure inside the ventilation pipe 1 rises. At this time, the tension of the first spring 34 overcomes the negative pressure of the ventilation pipe 1, pushing the sealing plug 32 against the sealing ring 31, so that the air inlet head 3 is closed, and the suction force of the telescopic pipe 21 increases to facilitate the concentrated absorption of the gas generated in the experimental area, thereby achieving the purpose of self-adaptive adjustment of the air suction amount.

[0029] As shown in Figure 3 , Figure 4 , preferably, the contact surface of the sealing plug 32 and the sealing ring 31 is conical, the bottom of the sealing ring 31 is fixedly connected with the first filter plate 36, and the bottom of the sealing plug 32 is fixedly connected with the dredging head 37. The dredging head 37 is composed of a plurality of thin needles, and each thin needle corresponds to a pore of the first filter plate 36.

[0030] In this embodiment, by arranging the first filter plate 36 at the through hole of the sealing ring 31, impurities in the air can be filtered, preventing impurities from accumulating inside the pipeline and affecting the service life of the pipeline and the ventilation effect. In addition, by arranging the dredging head 37 at the bottom of the sealing plug 32, the pores on the first filter plate 36 can be dredged when the sealing plug 32 is closed, preventing blockage.

[0031] As shown in Figure 3 , Figure 4 , Figure 5 , preferably, the top of the telescopic pipe 21 is provided with a ring groove 211, the inner wall of the ring groove 211 is slidably connected with a sliding ring 212, and the position between the ring groove 211 and the sliding ring 212 is fixedly connected with a second spring 213. The second spring 213 can increase the sealing property of the adsorption surface by pushing the sliding ring 212 against the magnetic block 23 that is magnetically adsorbed to the telescopic pipe 21. The bottom of the telescopic pipe 21 is fixedly connected with an air suction cover 22, the inner wall of the air suction cover 22 is provided with an air inlet 221, the air inlet 221 is flat and disc-shaped, the top of the air suction cover 22 is fixedly connected with a second filter plate 222 for filtering impurities in the air.

[0032] In this embodiment, by setting the air suction cover 22 at the bottom of the telescopic pipe 21, and opening the air inlet 221 in the form of a flat disc on the inner wall of the air suction cover 22, the coverage of air suction can be increased, and the air inlet amount will not be affected, and the second filter plate 222 arranged above the air suction cover 22 can filter impurities in the air to avoid the accumulation of impurities in the pipeline, affecting the service life of the pipeline and the ventilation effect.

[0033] The laboratory variable air volume ventilation mechanism of the utility model in use, the inside of ventilation pipe 1 will produce negative pressure when the air extractor extracts air, the inside of air inlet head 3 is retracted in air inlet head 3 under the influence of negative pressure, and is separated from sealing ring 31, air inlet head 3 opens and inhales, air inlet head 3 can be reasonably distributed on ventilation pipe 1 according to the actual experiment size, so that air inlet head 3 covers the inside of the laboratory comprehensively, avoids the dead angle of the laboratory in the air circulation process, and the gas in the partial area cannot be effectively circulated, and for the area that will produce additional gas during the experiment, the telescopic pipe 21 is extracted from the air suction pipe 2, the telescopic pipe 21 is separated from the abutting magnetic suction block 23, the telescopic pipe 21 is communicated with the ventilation pipe 1, the pressure in the ventilation pipe 1 rises due to the communication of the telescopic pipe 21 and the ventilation pipe 1, at this time, the tension of the first spring 34 overcomes the negative pressure of the ventilation pipe 1, pushes the sealing plug 32 against the sealing ring 31, so that the air inlet head 3 is closed, and the suction of the telescopic pipe 21 is increased, so as to conveniently concentrate the gas generated in the experimental area, so as to achieve the purpose of self-adapting adjustment of the air suction amount, by setting the first filter plate 36 at the through hole of the sealing ring 31, the impurities in the air can be filtered, and the ventilation effect is good, and by setting the dredging head 37 at the bottom of the sealing plug 32, the pores on the first filter plate 36 are dredged when the sealing plug 32 is closed, so as to avoid the blockage, by setting the air suction cover 22 at the bottom of the telescopic pipe 21, and opening the air inlet 221 in the form of a flat disc on the inner wall of the air suction cover 22, the coverage of air suction can be increased, and the air inlet amount will not be affected, and the second filter plate 222 arranged above the air suction cover 22 can filter impurities in the air.

[0034] It should be noted that, in this document, the terms such as first and second are used merely to differentiate one entity or operation from another, and do not necessarily require or imply that there is any such actual relationship or order between these entities or operations. Moreover, the terms "include", "contain" or any other variants thereof are intended to cover non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment.

[0035] Although the embodiments of the present application have been shown and described, it is to be understood that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present application, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A laboratory variable air volume ventilation unit comprising a ventilation duct (1), characterized in that: The ventilation pipe (1) is used for connecting the air inlet end of the air extractor, the bottom of the ventilation pipe (1) is provided with a plurality of air suction pipes (2), which should be arranged according to the actual needs of the laboratory to concentrate air extraction position, the bottom of the ventilation pipe (1) is provided with a plurality of air inlet heads (3), which should cover the laboratory comprehensively; The inner wall of the air suction pipe (2) is slidably connected with the telescopic pipe (21), the top of the inner wall of the ventilation pipe (1) is fixedly connected with the magnetic suction block (23) corresponding to the position of the telescopic pipe (21), which is used for magnetically adsorbing the telescopic pipe (21); The bottom of the air inlet head (3) is fixedly connected with the sealing ring (31), the inside of the air inlet head (3) is provided with the sealing plug (32) above the sealing ring (31), the inside of the air inlet head (3) is fixedly connected with the supporting ring (33) above the sealing plug (32), the supporting ring (33) and the sealing plug (32) are fixedly connected with the first spring (34).

2. A laboratory variable air volume terminal according to claim 1, wherein: The inner wall of the supporting ring (33) is slidably connected with the sliding rod (35), the sliding rod (35) is fixedly connected with the sealing plug (32), and the first spring (34) is movably sleeved on the outer wall of the sliding rod (35).

3. A laboratory variable air volume terminal according to claim 1, wherein: The abutting surface of the sealing plug (32) and the sealing ring (31) is conical, and the bottom of the sealing ring (31) is fixedly connected with the first filter plate (36).

4. A laboratory variable air volume terminal according to claim 3, wherein: The bottom of the sealing plug (32) is fixedly connected with the dredging head (37), the dredging head (37) is composed of a plurality of thin needles, and each thin needle corresponds to the aperture of the first filter plate (36).

5. A laboratory variable air volume terminal according to claim 1, wherein: The top of the telescopic pipe (21) is provided with a ring groove (211), the inner wall of the ring groove (211) is slidably connected with a sliding ring (212), and the position between the ring groove (211) and the sliding ring (212) is fixedly connected with a second spring (213).

6. A laboratory variable air volume terminal according to claim 1 wherein: The bottom of the telescopic pipe (21) is fixedly connected with the air suction cover (22), the inner wall of the air suction cover (22) is provided with an air inlet (221), and the air inlet (221) is provided in a flat disc shape.

7. A laboratory variable air volume terminal according to claim 6, wherein: The top of the air suction cover (22) is fixedly connected with a second filter plate (222) for filtering impurities in the air.

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