Gas removal device

Abstract

The utility model discloses a kind of gas removal devices, it includes a by one upper semicircle scroll casing and one lower semicircle scroll casing opposite cover synthesis shell body, shell body inside has a chamber, and is separated into two parallel vortex passages, its two side walls are respectively equipped with one opposite air inlet, top end has one exhaust hole, and chamber is equipped with one fan group, its motor has double-end output shaft and is respectively equipped with one impeller at two ends, to be guided into by each air inlet by outside gas when running and be discharged by exhaust hole after being compressed, and shell body bottom edge is locked with a fairing, to gather and guide airflow into chamber, by the design of protruding one cover part and one flow guide area, can improve air intake efficiency and maintain air pressure balance, reduce vibration and noise caused by impeller in high-speed operation, and chamber structure forms airflow passage conducive to motor heat dissipation, can reduce temperature rise and prolong service life.

Description

Technical Field

[0001] This utility model relates to the field of ventilation technology, specifically to a gas exhaust device, which can efficiently exhaust gas, and makes the manufacturing and assembly of the shell body simple and time-saving, while improving the stability of its structure and solving the problem of the exhaust shell body becoming loose or damaged due to vibration. Background Technology

[0002] Exhaust equipment is widely used in various places that require gas exchange or exhaust, such as factories, indoor spaces, kitchens, or above cooking stoves, for the rapid removal of gases. Existing exhaust equipment, such as blowers, includes a housing and a fan assembly. The housing is composed of two horizontally joined half-shells, with opposing air inlets on both sides and an exhaust port on the top. The fan assembly includes a motor locked inside the housing, which has two output shafts corresponding to two impellers located at the two air inlets. When the motor drives the impellers to rotate at high speed, gas is drawn in through the air inlets on both sides of the housing and discharged through the exhaust port at the top.

[0003] In existing designs of dual-inlet blowers, the airflow from both inlets typically converges radially towards the center. Due to the large circumferential intake range, insufficient inlet rectification or improper inlet contraction ratio design can lead to uneven inlet velocity distribution and secondary airflow (turbulence), reducing the effective intake cross-section utilization. Furthermore, simultaneous suction from both impellers causes a rapid initial pressure drop in the central region, easily resulting in localized low-pressure or near-vacuum areas. This imbalance in impeller chamber pressure generates axial aerodynamic imbalance and radial pulsation, manifesting as vibration and noise (including eddy current noise) during high-speed operation. Motor thermal management is also a common issue in dual-inlet centrifugal blowers. The motor is located between the two impellers, surrounded by low-speed backflow and secondary turbulence, resulting in insufficient convective heat transfer. If the casing lacks dedicated cooling airflow channels or auxiliary ventilation paths, the temperature rise of the motor windings and bearings is difficult to control during prolonged high-load operation, potentially affecting service life and lubrication stability. Although some designs employ external rotor motors, heat dissipation fins, or air ducts to improve heat dissipation, a trade-off between heat dissipation and protection still exists in environments with oil fumes, dust, or high humidity.

[0004] In other words, existing dual-intake centrifugal exhaust systems have made various improvements in terms of inlet rectification, pressure equalization of both chambers, volute-volute coupling, motor heat dissipation, and structural vibration suppression. However, under conditions of limited space, long-term pollution, and continuous operation under high load, they still face common problems such as insufficient intake efficiency, pressure pulsation and high structural noise, and insufficient thermal management margin. How to solve the aforementioned problems is something that the industry and users are eager to explore, and it is also the topic that this utility model aims to explore and solve.

[0005] Due to the aforementioned shortcomings and needs, the inventor of this utility model, drawing on years of experience in related technologies and product design and manufacturing, researched and developed a utility model to address these deficiencies and needs, and actively sought solutions. Through continuous research and trial production, a gas removal device was successfully developed, which overcomes the aforementioned problems and inconveniences in use without significantly increasing volume and cost. Utility Model Content

[0006] The main objective of this invention is to provide a gas exhaust device that can balance efficiency, gas pressure balance, and effective motor heat dissipation, thereby improving exhaust reliability and service life.

[0007] A secondary primary objective of this invention is to provide a gas removal device that can improve the rigidity and vibration damping effect of the structure, and reduce noise and energy consumption under all operating conditions.

[0008] Therefore, this utility model mainly achieves the above-mentioned objectives and effects through the following technical means, which at least include:

[0009] A shell body is formed by an upper semicircular vortex shell and a lower semicircular vortex shell being longitudinally closed on opposite sides, forming a chamber inside. The chamber has two parallel vortex channels. The top of the upper semicircular vortex shell has an exhaust hole that connects to the chamber. The upper and lower semicircular vortex shells have an upper semicircular air duct and a lower semicircular air duct on their respective sides to form the vortex channels. The outer wall of each vortex channel has an upper semicircular notch and a lower semicircular notch, which together form an air inlet on both sides of the shell body and connect to the vortex channels.

[0010] A fan assembly, disposed within the chamber, includes a motor having a dual-head output shaft. Each output shaft has an impeller at one end corresponding to the vortex channel, allowing gas to be introduced through the air inlet, agitated by the impeller, and discharged through the exhaust port.

[0011] A flow guide is located below the shell body and is locked to the bottom edge of the upper semi-circular vortex shell to gather and guide external airflow into the chamber.

[0012] Furthermore, this utility model utilizes the following technical means to further achieve the aforementioned objectives and effects; such as:

[0013] The upper and lower semicircular vortex shells are integral semicircular shells formed by injection molding of plastic material.

[0014] The upper semicircular vortex shell has a circular connecting ring around the exhaust hole at the top. The circular connecting ring surrounds the exhaust hole and is used to connect a row of air ducts.

[0015] The upper semicircular vortex housing and the lower semicircular vortex housing have a semicircular convex partition between their inner edges to divide the chamber into two vortex channels for the motor of the fan assembly to be inserted and positioned.

[0016] The semi-circular convex partition has a plurality of interlocking parts, and the outer periphery of the motor has a plurality of locking parts corresponding to the interlocking parts, so that the fan assembly is fixed to the cavity.

[0017] The upper semicircular vortex shell has grooves on its front and rear walls corresponding to the semicircular convex partitions, and each groove is covered with a front cover plate and a rear cover plate to form a space for guiding gas into the chamber.

[0018] The upper and lower semicircular vortex shells are provided with a locking part on each of the corresponding grooves, so that the upper and lower semicircular vortex shells can be locked together as a whole.

[0019] The upper semicircular vortex shell has a covering portion protruding outward from the upper semicircular notch on both sides, so that a guide zone is formed between each upper semicircular notch and the covering portion, which is used to collect external gas and introduce it into the chamber.

[0020] The air inlet is equipped with a grid cover to prevent foreign objects from entering the chamber.

[0021] The flow guide is in the shape of a hollow cylinder, with a second mating flange at its upper end and a plurality of locking parts to lock with the first mating flange of the upper semi-circular vortex shell. The lower end of the flow guide forms a connecting edge for connecting with a row of fans.

[0022] The beneficial effects of this utility model are as follows: The gas exhaust device of this utility model can utilize the upper and lower semi-circular vortex shells to cover each other to form the shell body, and the fan assembly can be stably embedded in the chamber. Combined with the guide shroud and the cover of the upper semi-circular vortex shell to form a guide area, it can effectively improve the efficiency of external airflow convergence, avoid air intake vortex and unevenness, and further guide the gas to the fan assembly to maintain the smooth and uniform air intake and the air pressure balance of the vortex channels on both sides. This reduces the pressure difference disturbance of each impeller on both sides and suppresses the vibration and aerodynamic noise generated during high-speed operation. In addition, it also forms a convection channel that is conducive to motor heat dissipation, extends the service life of the fan assembly, and greatly enhances its practical value. Attached Figure Description

[0023] Figure 1 This is a three-dimensional appearance schematic diagram of the present invention.

[0024] Figure 2 This is a three-dimensional exploded view of the present invention, used to illustrate the appearance and relative relationships of its main components.

[0025] Figure 3 This is a partial exploded perspective view of the present invention, used to illustrate the state of its shell body.

[0026] Figure 4 This is a side view sectional diagram of the assembled components of this utility model.

[0027] Figure 5 This is a front cross-sectional view of the assembled components of this utility model.

[0028] 10: Shell Body

[0029] 11: Chamber

[0030] 12: Vortex Channel

[0031] 13: Air intake

[0032] 15: Exhaust port

[0033] 20A: Upper semi-circular vortex shell

[0034] 20B: Lower semi-circular vortex shell

[0035] 21: Circular connector

[0036] 22: Semicircular convex partition

[0037] 220: Flat on bottom surface

[0038] 23: Groove section

[0039] 230: Locking part

[0040] 24: Fitting part

[0041] 25A: Upper semi-circular air duct

[0042] 25B: Lower semi-circular air duct

[0043] 250A: Upper semi-circular notch

[0044] 250B: Lower semicircular notch

[0045] 26: Covering section

[0046] 260: Diversion Zone

[0047] 27: First mating edge

[0048] 270: First locking part

[0049] 28: Front cover

[0050] 29: Rear cover

[0051] 40: Fan assembly

[0052] 41: Motor

[0053] 42: Dual-head output shaft

[0054] 45: Impeller

[0055] 46: Grille cover

[0056] 50: fairing

[0057] 51: Second mating edge

[0058] 52: Connection edge

[0059] 53: Second locking part Detailed Implementation

[0060] The accompanying drawings illustrate specific embodiments of the present invention and its components. All references to front and back, left and right, top and bottom, upper and lower, and horizontal and vertical are for ease of description only and are not intended to limit the present invention or restrict its components to any position or spatial orientation. The dimensions specified in the drawings and specification may be varied according to the design and requirements of specific embodiments of the present invention without departing from the scope of the patent application, and are therefore not limited to this structure in the patent application.

[0061] For details regarding the composition of the gas removal device of this utility model, please refer to [link / reference]. Figures 1 to 5 As shown, the gas exhaust device comprises at least a housing body (10), a fan assembly (40) disposed inside the housing body (10), and a flow guide (50) disposed below the housing body (10).

[0062] The shell body (10) has an internal chamber (11) with two parallel vortex channels (12). Each side wall of the shell body (10) has a corresponding air inlet (13) that connects to the adjacent vortex channels (12). The top of the shell body (10) has an exhaust port (15) that connects to the chamber (11). A preferred embodiment of the shell body (10) of this invention is as follows: Figure 2 As shown, the shell body (10) is composed of an upper semi-circular vortex shell (20A) and a lower semi-circular vortex shell (20B) that can be closed relative to each other. The upper and lower semi-circular vortex shells (20A, 20B) are integral semi-circular shell covers formed by injection molding of plastic material. The upper and lower semi-circular vortex shells (20A, 20B) are longitudinally locked together, forming the chamber (11) inside the shell body (10). The upper semi-circular vortex shell (20A) located at the top has a vent forming the exhaust. The circular connecting ring (21) of the opening (15) is used to connect a duct (not shown in the figure). The inner edge of the upper and lower semicircular vortex shells (20A, 20B) has a semicircular convex partition (22) that divides the chamber (11) into two vortex channels (12). The upper and lower semicircular vortex shells (20A, 20B) have a flat bottom surface (220) that can be fitted to each other at both ends of the aforementioned semicircular convex partition (22). Furthermore, the upper and lower semicircular vortex shells (20A, 20B) have a circular connecting ring (21) that can be fitted to each other. The front and rear walls of the outer edge of the 0B) are respectively formed with grooves (23) corresponding to the semi-circular convex partition (22), and the upper and lower semi-circular volutes (20A, 20B) have a corresponding locking part (230) in each of the grooves (23), so that the upper and lower semi-circular volutes (20A, 20B) that fit together can be locked together as one unit. In addition, the semi-circular convex partition (22) has a plurality of interlocking parts (24) for the aforementioned fan assembly (40) to be interlocked together, for the fan assembly (40) to be used to lock together. The upper and lower semicircular vortex shells (20A, 20B) are fixed inside the shell body (10). The upper and lower semicircular vortex shells (20A, 20B) have an upper semicircular air duct (25A) and a lower semicircular air duct (25B) respectively on both sides of the semicircular convex partition (22) for forming each vortex channel (12). The upper and lower semicircular vortex shells (20A, 20B) have an upper semicircular notch (250A) and a lower semicircular notch (250B) respectively on the outer side of each vortex channel (12) for forming the aforementioned air inlet (13).

[0063] Furthermore, a covering portion (26) is provided on both sides of the upper semicircular vortex shell (20A) at the aforementioned semicircular notch (250), so that a guide zone (260) is formed between the upper semicircular notch (250A) on both sides inside the upper semicircular vortex shell (20A) and the covering portion (26). Figure 5As shown, the gas can be effectively collected and guided into the chamber (11) of the shell body (10). The bottom edge of the upper semicircular vortex shell (20A) has a first mating flange (27), and the first mating flange (27) has a plurality of first locking parts (270). The first mating flange (27) and the first locking parts (270) can be used to lock the guide shroud (50) in a corresponding manner. In addition, a front cover plate (28) and a rear cover plate (29) are respectively covered on the grooves (23) on the front and rear walls of the upper semicircular vortex shell (20A) to form a space for guiding gas (e.g., Figure 4 As shown, this allows the gas to be completely introduced into the chamber (11) of the shell body (10);

[0064] The fan assembly (40) has a motor (41), and the motor (41) has a double-headed output shaft (42) that can extend from both ends. The outer periphery of the motor (41) has a plurality of equal angles and corresponding to the aforementioned housing body (10) insertion part (24) insertion part (43), so that the motor (41) of the fan assembly (40) can be fixed in the cavity (11) of the housing body (10). The two ends of the double-headed output shaft (42) are respectively provided with an impeller (45) corresponding to the aforementioned vortex channel (12), which is used to be driven to rotate at high speed to agitate the airflow. Furthermore, the fan assembly (40) is further provided with a grid cover (46) on the air inlet (13) of the aforementioned housing body (10).

[0065] Furthermore, the flow guide (50) is in the shape of a hollow cylinder, and the upper and lower end edges of the flow guide (50) are respectively formed with a second mating edge (51) and a connecting edge (52). The second mating edge (51) has a plurality of second locking parts (53) corresponding to the locking parts (270) of the first mating edge (27), so that the flow guide (50) can be locked to the bottom edge of the upper semi-circular vortex shell (20A) of the shell body (10), and the connecting edge (52) of the flow guide (50) can be used to connect a gas exhaust device such as an exhaust fan (not shown in the figure);

[0066] This allows for the construction of a gas exhaust device structure that combines efficiency with effective heat dissipation.

[0067] In practical use, the gas removal device of this utility model, such as Figure 1 , Figure 4 and Figure 5The disclosed fan assembly (40) is locked between the upper and lower semicircular volutes (20A, 20B) of the shell body (10), and the impellers (45) on both sides of the fan assembly (40) are aligned with the vortex channels (12) on both sides in the chamber (11) of the shell body (10). The guide shroud (50) is locked at the bottom edge of the upper semicircular volute (20A) of the shell body (10), and the guide shroud (50) is connected to the gas exhaust device. The cover (26) of the upper semicircular volute (20A) of the shell body (10) and the front and rear cover plates (28, 29) are used to form a complete gas guiding space. In this way, when the impellers (45) of the fan assembly (40) are driven at high speed, the gas can be effectively driven to flow to the exhaust port (15) of the shell body (10).

[0068] In actual operation, the gas can be collected by the gas exhaust device through the guide shroud (50) and the guide area (260) of the upper semi-circular vortex shell (20A), and enter the cavity (11) of the shell body (10) through the air inlet (13). After being compressed by the vortex channels (12) on both sides, it is quickly discharged through the exhaust port (15). Figure 5 As shown], to effectively improve exhaust efficiency, while some gas can be guided from the grooves (23) of the front and rear cover plates (28, 29) of the upper semi-circular volute (20A) to the motor (41) of the fan assembly (40) inside the housing body (10) [as shown]. Figure 4 As shown, not only does it keep the air pressure on both sides of the impeller (45) of the fan assembly (40) balanced, effectively reducing vibration frequency and noise, but also, because the gas flows through the motor (41) at high speed, the flow of the gas can quickly carry away the heat generated by the motor (41) during operation, thereby achieving the purpose of heat dissipation.

[0069] Based on the aforementioned structural design and operation mode, the gas exhaust device of this utility model uses the upper and lower semi-circular vortex shells (20A, 20B) to cover each other to form the shell body (10), and allows the fan assembly (40) to be stably embedded in the chamber (11). Combined with the guide shroud (50) and the cover part (26) of the upper semi-circular vortex shell (20A) to form the guide area (260), the efficiency of external airflow convergence is effectively improved, and the intake vortex and unevenness are avoided. Furthermore, the grooves (23) on the front and rear walls of the upper semi-circular vortex shell (20A) guide the gas to the fan assembly (40), thereby maintaining the smooth and uniform intake and the air pressure balance of the vortex channels (12) on both sides, thereby reducing the pressure difference disturbance of each impeller (45) on both sides, and suppressing the vibration and aerodynamic noise generated during high-speed operation. In addition, the structure also forms a convection channel that facilitates heat dissipation of the motor (41), which can effectively extend the service life of the fan assembly. At the same time, the housing body (10) has improved structural rigidity through a multi-locking design, and has excellent shock absorption and deformation resistance, so that the whole device can take into account high efficiency, low energy consumption and low noise operation performance under all working conditions, thereby greatly improving the reliability and durability of the overall exhaust device and enhancing its practical value in industrial and household exhaust applications.

[0070] In summary, it can be understood that this utility model is a highly inventive utility model. In addition to effectively solving the problems faced by the inventors, it greatly improves the efficiency. Moreover, no identical or similar product utility models or publicly available products have been found in the same technical field. Since it also has the effect of improving efficiency, this utility model has met the requirements of "novelty" and "inventiveness" for utility model patents, and therefore a utility model patent application has been filed in accordance with the law.

Claims

1. A gas removal device, characterized in that: It includes at least: A shell body is formed by an upper semicircular vortex shell and a lower semicircular vortex shell being longitudinally closed on opposite sides, forming a chamber inside. The chamber has two parallel vortex channels. The top of the upper semicircular vortex shell has an exhaust hole that connects to the chamber. The upper and lower semicircular vortex shells have an upper semicircular air duct and a lower semicircular air duct on their respective sides to form the vortex channels. The outer wall of each vortex channel has an upper semicircular notch and a lower semicircular notch, which together form an air inlet on both sides of the shell body and connect to the vortex channels. A fan assembly, disposed within the chamber, includes a motor having a dual-head output shaft. Each output shaft has an impeller at one end corresponding to the vortex channel, allowing gas to be introduced through the air inlet, agitated by the impeller, and discharged through the exhaust port. A flow guide is located below the shell body and is locked to the bottom edge of the upper semi-circular vortex shell to gather and guide external airflow into the chamber.

2. The gas removal device as described in claim 1, characterized in that, The upper and lower semi-circular vortex shells are integral semi-circular shells formed by injection molding of plastic material.

3. The gas removal device as described in claim 1, characterized in that, The exhaust port at the top of the upper semi-circular vortex shell has a circular connecting ring around it, which forms the exhaust port and is used to connect a row of air ducts.

4. The gas removal device as described in claim 1, characterized in that, A semi-circular convex partition is provided between the inner edges of the upper and lower semi-circular volutes to divide the chamber into two vortex channels for the motor of the fan assembly to be inserted and positioned.

5. The gas removal device as described in claim 4, characterized in that, The semi-circular convex partition has a plurality of interlocking parts, and the outer periphery of the motor has a plurality of locking parts corresponding to the aforementioned interlocking parts, so that the fan assembly is fixed to the chamber.

6. The gas removal device as described in claim 1, characterized in that, The front and rear walls of the upper semicircular vortex shell are respectively formed with grooves corresponding to the semicircular convex partitions, and a front cover plate and a rear cover plate are respectively covered on each groove to form a space for guiding gas into the chamber.

7. The gas removal device as described in claim 6, characterized in that, The upper and lower semicircular vortex shells are each provided with a locking part in their respective grooves, so that the upper and lower semicircular vortex shells can be locked together as one unit.

8. The gas removal device as described in claim 1, characterized in that, The upper semicircular vortex shell has a covering portion protruding outward on both sides of the upper semicircular notch, so that a flow guiding area is formed between each upper semicircular notch and the covering portion, which is used to collect external gas and introduce it into the chamber.

9. The gas removal device as described in claim 1, characterized in that, The air inlet is equipped with a grid cover to prevent foreign objects from entering the chamber.

10. The gas removal device according to any one of claims 1 to 9, characterized in that, The flow guide is in the shape of a hollow cylinder. It has a second mating flange at the upper end and a plurality of locking parts to lock with the first mating flange of the upper semi-circular vortex shell. The lower end of the flow guide forms a connecting edge for connecting with a row of fans.

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