Air interchanger for laboratory

Abstract

The utility model discloses an air interchanger for a laboratory. The air interchanger comprises an exhaust hood, a connecting part and an air guide pipe, a slot is formed outside a mounting hole formed in the upper part of the exhaust hood, and the connecting part is vertically connected to the top of the exhaust hood and is communicated with the mounting hole; the air guide pipe is detachably connected to the connecting part, the interior of the connecting part is detachably connected with a purifying part used for filtering air entering the air exhaust hood, and the position, located at the top in the air exhaust hood, of the bottom end of the purifying part is connected with a fixing mechanism; the exhaust hood has the advantages of being convenient to disassemble, easy to maintain, long in service life and capable of purifying air and improving the air quality in a laboratory, and the connecting part, the exhaust hood and the air guide pipe can be fixedly combined into a whole, so that the exhaust hood and the air guide pipe are in a balanced and stable state all the time in the using process; and contact and shaking abrasion generated between the air guide pipe and the air exhaust cover are reduced, and long-term use of the air interchanger for the laboratory is facilitated.

Description

Technical Field

[0001] The utility model relates to the field of laboratory ventilation facilities, in particular to a ventilation device for laboratories. Background Art

[0002] Universal exhaust hood is a common ventilation facility in laboratories and a basic component of laboratory ventilation devices. It is a device used to quickly discharge small-scale dust, hot air, volatile gases, harmful gases and other small-scale floating particles or gases generated in the experiment or production process. The current laboratory ventilation device has a single function, and the overall stability of the exhaust hood and the air duct is poor when installed. The joint between the exhaust hood and the air duct is prone to breakage during use, which affects the service life of the air duct and the exhaust hood, and is not conducive to the promotion and use of the laboratory ventilation device. Utility Model Content

[0003] The utility model aims to provide a laboratory ventilation device to solve the problems in the background art that the exhaust hood and the air duct of the current ventilation device are poor in overall stability when installed and the joint is prone to breakage.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A laboratory ventilation device, comprising:

[0006] An exhaust hood, wherein a slot is arranged outside a mounting hole opened above the exhaust hood;

[0007] A connecting portion, the connecting portion is vertically connected to the top of the exhaust hood and is connected to the mounting hole;

[0008] An air guide tube, the air guide tube is detachably connected to the connecting portion, and the bottom end of the air guide tube is vertically inserted into the groove cavity of the slot;

[0009] Among them, the interior of the connecting part is detachably connected with a purification part for filtering the gas entering the exhaust hood, the vertical height of the purification part exceeds the vertical height of the connecting part, and the bottom end of the purification part is located at the top position in the exhaust hood and is connected to a fixing mechanism, which is used to firmly install the purification part to confine it in the connecting part.

[0010] Preferably, the fixing mechanism includes a second external thread arranged on the outer surface of the purification part, and a screw-on part located at the top of the exhaust hood and screwed to the bottom surface of the outer side of the purification part. A through screw hole is provided in the middle of the top of the screw-on part, and the screw hole cooperates with the second external thread to fix the screw-on part and the purification part together.

[0011] Preferably, the overall transverse length of the screw-on portion exceeds the overall transverse length of the connecting portion, and the diameter of the screw hole on the screw-on portion is equal to the overall transverse length of the purification portion.

[0012] Preferably, the purification part is composed of a support tube that passes through from top to bottom, and a filtering structure installed in the support tube. The top surface of the outer wall of the support tube is provided with a convex edge, and the bottom of the convex edge is attached to the top surface of the connecting part. The filtering structure includes an upper filter and a lower filter installed in the inner cavity of the support tube, and a filter element located between the upper filter and the lower filter. The upper filter and the lower filter are HEPA filters, antibacterial biological filters, nano deodorizing filters or ion photocatalyst filters.

[0013] Preferably, the filter element is composed of an inclined net, an upper filter material layer and a lower filter material layer. The main appearance of the inclined net is a "W" or "M" type structure, and the filter materials of the upper filter material layer and the lower filter material layer are nano-grade activated carbon, carbon fiber or antibacterial cotton.

[0014] The beneficial effects of the utility model are:

[0015] 1. The utility model has the characteristics of convenient disassembly, simple maintenance and long service life. The first external thread, the reinforcement pad and the slot can be used to facilitate the disassembly and installation of the exhaust hood and the air duct, and the connecting part, the exhaust hood and the air duct can be fixedly combined into one during installation, so that the exhaust hood and the air duct are always in a balanced and stable state during use, which improves the overall stability of the exhaust hood and the air duct during installation, greatly reduces the contact wear and shaking wear generated between the air duct and the exhaust hood, thereby extending the service life of the air duct and the exhaust hood, and then extending the service life of the laboratory ventilation device. At the same time, the screw-fastening part and the second external thread can be used to stably place the purification part in the connecting part, and rely on the purification part to allow the ventilation device to have the function of purifying gas and improving the air quality in the laboratory, which is conducive to the promotion and use of the laboratory ventilation device.

[0016] 2. The slot of the utility model is set so that the bottom end of the air duct can be vertically inserted, thereby protecting the joint between the air duct and the exhaust hood, greatly reducing the probability of breakage and rupture at the joint between the air duct and the exhaust hood, extending the service life of the air duct and the exhaust hood, and facilitating the promotion and use of the laboratory ventilation device. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural cross-sectional view of the utility model laboratory ventilation device;

[0018] Figure 2 This is a structural stereogram of the utility model laboratory ventilation device without an air guide tube;

[0019] Figure 3 For this utility model Figure 1 The main view of the structure;

[0020] Figure 4 For this utility model Figure 1 A schematic diagram of the enlarged local structure at A;

[0021] Figure 5 It is a structural stereogram of the purification unit of the utility model;

[0022] Figure 6 It is a top view of the structure of the screw-fastening part of the utility model.

[0023] In the figure: 1 exhaust hood, 101 slot, 2 connecting part, 201 through hole, 202 first external thread, 3 reinforcement pad, 4 purification part, 401 support tube, 402 upper filter screen, 403 lower filter screen, 404 inclined screen, 405 upper filter material layer, 406 lower filter material layer, 407 convex edge, 408 second external thread, 5 air guide tube, 6 screw fixing part, 601 screw hole. 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 in 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] See also Figure 1-6 , which provides a technical solution for the utility model, a laboratory ventilation device, including an exhaust hood 1, a connecting part 2 and an air duct 5; a slot 101 is arranged outside the mounting hole opened above the exhaust hood 1, the connecting part 2 is vertically connected to the top of the exhaust hood 1 and is connected to the mounting hole, the air duct 5 is detachably connected to the connecting part 2, and the bottom end of the air duct 5 is vertically inserted into the groove cavity of the slot 101; wherein the connecting part 2 and the exhaust hood 1 are an integrated connection molding structure, and the inside of the connecting part 2 is detachably connected with a purification part 4 for filtering the gas entering the exhaust hood 1, the vertical height of the purification part 4 exceeds the vertical height of the connecting part 2, and the bottom end of the purification part 4 is located at the top position inside the exhaust hood 1 and is connected with a fixed Mechanism, the fixing mechanism is used to firmly install the purification part 4 to be confined in the connecting part 2; preferably, the connecting part 2 adopts but is not limited to a branch pipe that is connected from top to bottom, and a through hole 201 is provided on the top of the connecting part 2, and a reinforcement pad 3 is bonded to the inner hole wall of the through hole 201. By using the set reinforcement pad 3, the overall stability of the purification part 4 installed inside the connecting part 2 can be improved, and then the purification part 4 can be firmly installed on the exhaust hood 1. Furthermore, the air guide pipe 5 is installed on the connecting part 2 in a threaded connection manner. At this time, the outer surface of the connecting part 2 is arranged with a first external thread 202, and the inner tube wall of the air guide pipe 5 is provided with an internal thread, and the internal thread cooperates with the first external thread 202, so that the air guide pipe 5 and the connecting part 2 are combined into one.

[0026] In the present embodiment, the fixing mechanism mentioned comprises a second external thread 408 arranged on the outer surface of the purification part 4, and a screw-fastening part 6 located at the inner top of the exhaust hood 1 and screwed to the outer bottom surface of the purification part 4, a through screw hole 601 is provided in the middle of the top of the screw-fastening part 6, and the screw hole 601 cooperates with the second external thread 408 to fix the screw-fastening part 6 and the purification part 4 together; the overall lateral length of the screw-fastening part 6 exceeds the overall lateral length of the connecting part 2, and the diameter of the screw hole 601 on the screw-fastening part 6 is equal to the overall lateral length of the purification part 4; wherein, by using the screw-fastening part 6 and the second external thread 408 to cooperate, the stability of the purification part 4 in the connecting part 2 when installed can be further improved, and the contact wear generated when the connecting part 2 and the purification part 4 contact each other can be greatly reduced, thereby extending the service life of the connecting part 2 and the purification part 4, and further extending the service life of the laboratory ventilation device; and under the action of the fixing mechanism, the detachable connection between the purification part 4 and the screw-fastening part 6 can be conveniently realized, thereby facilitating the maintenance of the purification part 4.

[0027] In the present embodiment, the purification section 4 mentioned is composed of a support tube 401 which passes through from top to bottom, and a filtering structure installed in the support tube 401. A convex edge 407 is installed on the top surface of the outer wall of the support tube 401, and the bottom of the convex edge 407 is attached to the top surface of the connecting portion 2. The top view of the convex edge 407 is a circular ring structure. The convex edge 407 mentioned can facilitate the purification section 4 to be quickly set in the through hole 201 of the connecting portion 2, that is, when the purification section 4 is installed, the purification section 4 is first directly placed vertically from top to bottom in the through hole 201. Since the vertical height of the purification section 4 exceeds the vertical height of the connecting portion 2, the bottom end of the purification section 4 extends out of the connecting portion 2 at this time, and the protruding part of the purification section 4 is located at the top of the exhaust hood 1, and then the screw-on section 6 is used to connect with the bottom end of the purification section 4 through threads.

[0028] It should be noted that the filtering structure includes an upper filter 402 and a lower filter 403 installed in the inner cavity of the support tube 401, and a filter element located between the upper filter 402 and the lower filter 403, wherein the upper filter 402 and the lower filter 403 are but not limited to HEPA filters, antibacterial biological filters, nano deodorizing filters or ion photocatalyst filters; the filter element is composed of an inclined mesh 404, an upper filter material layer 405 and a lower filter material layer 406, wherein the main appearance of the inclined mesh 404 is a "W" or "M" shaped structure, and the filter materials of the upper filter material layer 405 and the lower filter material layer 406 are but not limited to nano-grade activated carbon, carbon fiber or antibacterial cotton; the setting of the purification part 4 can filter and purify the gas entering the exhaust hood 1 in advance when the laboratory ventilation device is used; wherein the inclined mesh 404 of the "W" or "M" shaped structure can extend the filtration path of the gas and extend the filtration time of the gas, thereby improving the purification effect of the gas.

[0029] The laboratory ventilation device is a universal exhaust hood. When it needs to be used in conjunction with an exhaust fan, the purification part 4 is directly installed inside the connecting part 2, and the screw-fastening part 6 is used to reinforce the purification part 4, so that the purification part 4 is stably placed in the connecting part 2. When the purification part 4 is installed, the air guide tube 5 is installed on the connecting part 2. At this time, the air guide tube 5 is threadedly connected to the outer surface of the connecting part 2, and the bottom end of the air guide tube 5 vertically extends into the slot 101. The exhaust fan can be started to use the exhaust hood 1; when the exhaust fan 1 is running, the gas in the laboratory is collected in the exhaust hood 1, and under the action of the exhaust fan, the gas in the laboratory enters the exhaust hood 1, the purification part 4, the connecting part 2 and the air guide tube 5 in turn. At this time, the laboratory gas passing through the purification part 4 can be filtered and purified to filter out harmful substances in the laboratory gas, thereby achieving the purpose of purifying the air in the laboratory.

[0030] The above embodiments only express the preferred implementation methods of the utility model, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be understood that, for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, and these all belong to the protection scope of the utility model. In the utility model, unless otherwise clearly specified and limited, the terms "installation", "connection", "connection", "fixation" and the like should be understood in a broad sense, for example, it can be a fixed connection, or a detachable connection, or integrated; it can be a mechanical connection; it can be directly connected, or indirectly connected through an intermediate medium, it can be the internal connection of two components or the interaction relationship between two components; among them, there are many ways of detachable installation, for example, it can be through the method of plug-in and snap-fit, for example, through the method of bolt connection, etc.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A laboratory ventilation device, characterized in that: include: An exhaust hood, wherein a slot is arranged outside a mounting hole opened above the exhaust hood; A connecting portion, the connecting portion is vertically connected to the top of the exhaust hood and is connected to the mounting hole; An air guide tube, the air guide tube is detachably connected to the connecting portion, and the bottom end of the air guide tube is vertically inserted into the groove cavity of the slot; Among them, the interior of the connecting part is detachably connected with a purification part for filtering the gas entering the exhaust hood, the vertical height of the purification part exceeds the vertical height of the connecting part, and the bottom end of the purification part is located at the top position in the exhaust hood and is connected to a fixing mechanism, which is used to firmly install the purification part to confine it in the connecting part.

2. The laboratory ventilation device according to claim 1, characterized in that: The fixing mechanism includes a second external thread arranged on the outer surface of the purification part, and a screw-fastening part located at the top of the exhaust hood and screwed to the bottom surface of the outer side of the purification part. A through screw hole is opened in the middle of the top of the screw-fastening part, and the screw hole cooperates with the second external thread to fix the screw-fastening part and the purification part together.

3. The laboratory ventilation device according to claim 2, characterized in that: The overall transverse length of the screw-on portion exceeds the overall transverse length of the connecting portion, and the diameter of the screw hole on the screw-on portion is equal to the overall transverse length of the purification portion.

4. The laboratory ventilation device according to claim 1, characterized in that: The purification part is composed of a support tube that passes through from top to bottom, and a filtering structure installed in the support tube. The top surface of the outer wall of the support tube is equipped with a convex edge, and the bottom of the convex edge is attached to the top surface of the connecting part. The filtering structure includes an upper filter screen and a lower filter screen installed in the inner cavity of the support tube, and a filter element located between the upper filter screen and the lower filter screen. The upper filter screen and the lower filter screen adopt HEPA filter screen, antibacterial biological filter screen, nano deodorization filter screen or ion photocatalyst filter screen.

5. The laboratory ventilation device according to claim 4, characterized in that: The filter element is composed of an inclined net, an upper filter material layer and a lower filter material layer. The main appearance of the inclined net is a "W" or "M" structure, and the filter materials of the upper filter material layer and the lower filter material layer are nano-grade activated carbon, carbon fiber or antibacterial cotton.

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