TWM465833U - Diversion door handle for fume hood - Google Patents

Description

Fume hood guide door handle

This creation belongs to the field of auxiliary laboratory equipment, especially for a diversion door handle applied to the edge of the sliding door of the fume hood to reduce turbulence when the airflow enters.

According to the current practice, the fume hood is a common equipment in chemical laboratories. Because of the chemical experiments, most of the gases generated by the gas contain solvents, acidic substances (such as perchloric acid or hydrofluoric acid) or alkaline substances. The polluting exhaust gas is discharged through the fume hood and discharged to the outside to ensure the safety of the operator and the working environment. In operation, the air suction device is installed in the top of the exhaust cabinet to maintain the running state, and the air deflector disposed at the proper position of the exhaust cabinet is used to extract the exhaust gas inside the exhaust cabinet. After the treatment, it is discharged outward. Moreover, the front side of the fume hood is provided with a glass sliding door which is opened from the bottom up, and cannot be completely closed during operation or an inlet port must be reserved at the threshold of the fume hood to provide sufficient intake air to dilute the air inlet. Polluted exhaust gas in the exhaust cabinet.

Moreover, the opening height of the glass sliding door directly affects the surface wind speed of the front opening. If the glass sliding door is opened, the suction wind speed will become smaller. Conversely, if the sliding door is closed, the suction wind speed will become larger. If the operator does not need to operate, the glass sliding door should be kept closed to avoid toxic exhaust gas from escaping.

Since the handle of the glass sliding door has no structure or device for allowing air to circulate, when the glass sliding door of the fume hood is completely closed, not only the external airflow cannot be inhaled. The formation of a vacuum phenomenon within it does not allow the internal air to circulate, but instead accumulates in the cabinet, which not only affects the experimental data results, but also may cause danger. Moreover, when the glass sliding door is not completely closed, although the inside of the fume hood continuously draws in the airflow to prevent the exhaust gas from escaping, the turbulent or turbulent flow occurs when the airflow passes through the handle, and a reverse airflow is generated ( That is, the airflow flowing toward the outside of the fume hood, and some of the entrained exhaust gas escapes, which may damage the health and safety of the operator.

In view of this, one of the aims of the present invention is to provide a fume hood guide door handle, and an air flow passage is formed inside a handle, which can maintain communication with the outside air after being closed, and can be moderately performed. The effect of qi. Moreover, after the sliding door is opened, the door handle can also utilize the diversion design of the air flow passage to avoid turbulence at the edge of the sliding door, affecting the function of the exhausting air to absorb the exhaust gas, and at the same time avoiding the escape of the exhaust gas.

In order to achieve the above object, the ventilating cabinet guide door handle of the present invention is disposed at the edge of one of the sliding doors of the ventilating cabinet, and comprises: a pedestal corresponding to the sliding door to form a long strip structure. According to a cross-sectional view, a side of the base is provided with a fitting groove for receiving the sliding door, and the base is provided with an abutting portion with respect to the other side of the fitting groove. a buckle portion and a second buckle portion, and the interior of the base has at least one air flow passage, and the air flow passage is provided with a first outer air inlet relative to one side of the first buckle portion, relative to the a first outer air outlet is disposed on one side of the second fastening portion; and a cover body has a first barb portion and a second barb portion respectively formed at the two ends for respectively engaging the first buckle And the second fastening portion, the cover body covers the base relative to the one surface of the abutting portion, and a second external air inlet and a second external air are respectively formed between the cover body and the base Export.

In one embodiment, the base is made of an aluminum extrusion technology, and the cover system is made of a plastic material and has a strip-shaped structure, and the surface thereof has a stripe portion, which can increase the handheld Friction when pulling.

In one embodiment, when a plurality of air flow passages are provided, the first outer air inlet and the first outer air outlet of each air flow passage are in the shape of a long ellipse, and are arranged in a straight line arrangement. In the pedestal, an air flow passage can be formed by the first external air inlet, the air flow passage and the first external air outlets, so that the airflow enters the second external air inlet, and then leads The flow is ejected from the second outer air outlet. Moreover, the first barb portion is provided with a flow guiding arc surface with respect to the second outer air inlet, and the second barb portion is provided with a flow guiding slope with respect to the second outer air outlet, and can be added. The smoothness of gas and gas.

In an embodiment, the abutting portion is formed by two folded plates that are folded into the center from the side, and a gap is formed between the two folded plates, so that the cover plate covers the notch, and the abutting portion The central system is hollow and can reduce the weight of the base.

1‧‧‧Fume hood guide door handle

11‧‧‧Base

111‧‧‧ fitting groove

112‧‧‧Abutment

1121‧‧‧Folding

1122‧‧ ‧ gap

113‧‧‧First buckle

114‧‧‧Second buckle

115‧‧‧Air flow path

116‧‧‧First external gas inlet

117‧‧‧First external gas export

12‧‧‧ Cover

121‧‧‧ striped section

122‧‧‧The first barb

1221‧‧ ‧ Diversion surface

123‧‧‧Second barb

1231‧‧ ‧ diversion ramp

124‧‧‧Second external gas inlet

125‧‧‧Second external gas export

2‧‧‧Fume hood

21‧‧‧Slammen

22‧‧‧ Track

23‧‧‧Aspirator

3‧‧‧ airflow

Figure 1 is an exploded perspective view of a preferred embodiment of the present invention.

Figure 2 is a cross-sectional view of a preferred embodiment of the present invention.

Figure 3 is a schematic view showing the state after installation of the preferred embodiment of the present invention.

Figure 4 is a schematic view showing the state of the airflow when used in the preferred embodiment of the present invention.

Figure 5 is an exploded perspective view of another preferred embodiment of the present invention.

Figure 6 is a cross-sectional view showing another preferred embodiment of the present invention.

In order for your review board to have a clear understanding of the content of this creation, please refer to the following description only.

Please refer to Figures 1, 2, 3, and 4 for an exploded perspective view and a cross-sectional view of the preferred embodiment of the present invention, and a schematic diagram of the state after installation and a schematic diagram of the airflow state during use. As shown in the figure, the fume hood guide door handle 1 of the present invention is disposed at the edge of one of the sliding doors 21 of the fume hood 2, wherein the sliding door 21 is made of glass material and is slidably disposed on The fume hood 2 is opened in a rail 22 on both sides of the opening, and is operated to slide up and down. The fume hood guide door handle 1 includes a base 11 and a cover 12.

The pedestal 11 is formed by an aluminum extrusion technique, and the length of the base 11 is made corresponding to the sliding door 21. The pedestal 11 is formed by a cross section, and one side of the pedestal is provided with a side edge. The fitting groove 111 receives the edge of the sliding door 21 and a portion thereof, and can be adhesively reinforced; the base 11 is provided with an offset relative to the other side of the fitting groove 111. a portion 112, a first buckle portion 113 and a second buckle portion 114, and the interior of the base 11 has an air flow passage 115, and the air flow passage 115 is opposite to one side of the first buckle portion 113. A plurality of first external air inlets 116 are provided, and a plurality of first external air outlets 117 are provided with respect to one side of the second fastening portion 114. It should be noted that the first external air inlets 116 and the first outer air outlets 117 are all in the shape of a long ellipse, and the first external air inlets 116 and the first ones are used in order to balance the strength during use. An outer air outlet 117 is arranged in a linear arrangement. In addition, the abutting portion 112 is formed by two folded plates 1121 which are folded into the center from the center, and a notch 1122 is formed between the two folded plates 1121, so that the cover plate 12 covers the notch 1122, not only The cover body 12 can be provided with a moderate abutting force, and the weight of the body of the base 11 can be effectively reduced.

The cover body 12 is formed by a plastic material and is formed into a long strip-shaped structure. And a surface of the first buckle portion 122 and a second barb portion 123 for respectively engaging and wrapping the first buckle portion 113 and the second portion A second outer air inlet 124 and a second outer air outlet 125 are respectively formed between the cover 12 and the base 11 . In addition, in order to balance the air intake and the outflow, the first barb portion 122 is provided with a flow guiding surface 1221 opposite to the second outer air inlet 124, and the second barb portion 123 is opposite to the second barrage portion 123. The second outer air outlet 125 is provided with a flow guiding slope 1231 to increase the smoothness of the intake air and the air outlet. .

When the present invention is used, as shown in FIG. 4, since the top of the fume hood 2 is provided with a suction device 23, suction can be generated to draw air adjacent to the opening of the fume hood 2 into the interior thereof to form an air flow 3 And flowing the airflow 3 to push the exhaust gas of the experiment into the interior of the fume hood 2 without escaping, and further extracting by the air suction device; meanwhile, the fume hood guide door handle 1 of the present invention can be The second outer air inlet 124, the first outer air inlet 116, the air flow path 115, the first outer air outlet 117 and the second outer air outlet 125 form an air flow path, with the air flow 3 When being brought into the interior of the fume hood 2, the airflow 3 near the opening will enter the portion of the airflow 3 in the direction of the airflow path, and then directly sprayed into the fume hood along the second external air outlet 125. In the case of 2, the turbulent air accumulated in the vicinity of the damper guide door handle 1 is dissipated, so that eddy current or turbulence does not occur, so that there is no problem that the exhaust gas escapes as in the conventional handle. Furthermore, the fume hood guide door handle 1 of the present invention can also vent air through the air flow passage after the sliding door 21 is completely closed, so that the air suction device can be burned without excessive operation.

Please refer to Figures 5 and 6 together for an exploded perspective view and a cross-sectional view of another preferred embodiment of the present invention. As shown in the figure, in order to further achieve the purpose of lightening, the design of the base 11 and the cover 12 of the prior preferred embodiment of the present invention is simplified, in particular, the base 11 a central thickness, and removing the structure of the flap 1121 and the notch 1122; and moving the flow guiding bevel 1231 to a position corresponding to the first outer air outlet 116, and the cover 12 extends its length and The second outer air outlet 125 is formed between the bases 11 and is mounted in the same manner as the previous preferred embodiment to achieve the same effect.

However, the above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Therefore, it is common knowledge in the technical field or equivalent or easy to be familiar with the technology. The changes and modifications made by the changer without departing from the spirit and scope of this creation shall be covered by the scope of this creation.

1‧‧‧Fume hood guide door handle

11‧‧‧Base

111‧‧‧ fitting groove

112‧‧‧Abutment

113‧‧‧First buckle

114‧‧‧Second buckle

115‧‧‧Air flow path

116‧‧‧First external gas inlet

117‧‧‧First external gas export

12‧‧‧ Cover

121‧‧‧ striped section

122‧‧‧The first barb

1221‧‧ ‧ Diversion surface

123‧‧‧Second barb

1231‧‧ ‧ diversion ramp

Claims (7)

A ventilating cabinet guide door handle is disposed at an edge of a sliding door of the ventilating cabinet, and comprises: a pedestal corresponding to the sliding door to form a long strip structure, which is viewed from a cross section One of the side edges of the seat is provided with a fitting groove for receiving the sliding door therein, and the base is provided with an abutting portion, a first buckle portion and a second portion opposite to the other side of the fitting groove a buckle portion, and the interior of the base has at least one air flow passage, and the air flow passage is provided with a first outer air inlet relative to one side of the first buckle portion, and is opposite to one side of the second buckle portion And a first outer air outlet; and a cover body, wherein the two ends respectively form a first barb portion and a second barb portion for respectively engaging the first button portion and the second button portion The cover body covers the base with respect to one surface of the abutting portion, and a second outer air inlet and a second outer air outlet are respectively formed between the cover body and the base. The ventilating cabinet guide door handle according to claim 1, wherein the pedestal is made by an aluminum extrusion technique. The ventilating cabinet guide door handle according to claim 2, wherein the cover system is a long strip-shaped structure made of a plastic material, and the surface thereof has a stripe portion. The ventilating cabinet guide door handle according to claim 3, wherein when a plurality of air flow passages are provided, the first outer air inlet and the first outer air outlet of each air flow passage are long The strips are elliptical in shape and are arranged in a line at intervals in the base. The fume hood guide door handle of claim 4, wherein the first barb portion is provided with a flow guiding surface relative to the second outer air inlet. The ventilating cabinet guide door handle of claim 5, wherein the second barb portion is provided with a flow guiding slope relative to the second outer air outlet. The ventilating cabinet guide door handle according to claim 6, wherein the abutting portion is formed by two folded plates which are folded into the center from the side, and a gap is formed between the two folded plates. The cover is wrapped around the gap.