CN100443731C - Ventilation fan and its electrical junction box with wrapping structure - Google Patents

Abstract

A ventilation fan includes a frame, a motor, fan blades, a power cord, a ground wire, an electrical junction box and a control assembly, wherein the electrical junction box is vertically installed on the frame, and the power cord and the motor control assembly are installed in the electrical junction box. The electrical junction box includes a box cover and a box body. The box cover is provided with a wrapping structure, and the box body is provided with a vertical edge, so that the box cover wraps the edge outside the vertical edge of the box body. The box cover and the box body are slidably joined together, which improves the waterproof performance of the electrical junction box (4), that is, enhances the waterproof performance of the ventilation fan.

Description

Ventilation fan and its electrical junction box with wrapping structure

technical field

The invention relates to an electrical appliance junction box with a wrapping structure and a ventilation fan with the electrical appliance junction box.

Background technique

Ventilation fans have been widely used in modern home life, and they are usually installed on the exterior walls or windows of buildings to provide exchange between indoor air and outdoor air. Due to exposure to the external environment, the electrical junction box of the ventilation fan is vulnerable to rainwater, and enhancing the waterproof performance of the electrical junction box of the ventilation fan is a key issue for its improvement.

FIG. 3 shows a schematic diagram of an electrical junction box of a ventilating fan in the prior art. As shown in the figure, the junction box (44) of the ventilation fan is composed of a box body (441) and a box cover (442). When in use, the box body is usually installed vertically on the ventilation fan frame, and the ventilation fan motor is installed in the box body The box cover (442) is horizontally inlaid with the box body (441) to form a waterproof closed structure, but the seal of the horizontal inlay is often not particularly tight, and there is a certain possibility of water leakage .

In addition, in the prior art, the grounding wire introduced together with the power line is to connect the outer end of the grounding terminal to the metal frame of the ventilating fan outside the electrical junction box, which may be touched by human hands.

Contents of the invention

Accordingly, an object of the present invention is to provide an electrical junction box in which waterproof performance is further enhanced. The electrical junction box also has the function of protecting the ground wire.

Another object of the present invention is to provide a ventilating fan with the above electrical junction box.

The purpose of the present invention is achieved in that the present invention provides a ventilation fan with an electrical junction box with a wrapping structure, as shown in Figure 1, including a frame (1), a motor (2), a fan blade (3), and a ground wire (7), a power cord (6), an electrical junction box (4) and a control assembly (5), wherein the electrical junction box (4) is installed vertically on the frame (1), and the power cord and the motor The control assembly (5) is installed in the electrical junction box (4), and the electrical junction box (4) includes a box cover (42) and a box body (41), wherein the box of the electrical junction box The cover is provided with a hemming structure, the hemming (42-2) of the box cover is wrapped around the vertical edge (41-2) of the box body, and the box cover and the box body of the electrical junction box are slidably engaged The structure, and the sliding direction is from top to bottom, and the ground terminal of the ground wire of the ventilation fan is placed in the junction box and covered by the box cover.

The present invention also provides an electrical junction box (4), which includes a box cover (42) and a box body (41), in which power lines and control components can be installed, and is characterized in that the box cover of the electrical junction box A wrapping (42-2) structure is provided on the top, and the wrapping of the box cover is wrapped outside the vertical edge (41-2) of the box body.

The invention has the advantages of improving the waterproof performance of the electrical junction box (4), that is, enhancing the waterproof performance of the ventilation fan using the electrical junction box (4), in case any water splashes onto the electrical junction box (4) of the ventilation fan At the same time, the water will also flow down the outside of the box cover or the box body under the action of gravity, and will not enter the inside of the junction box. In addition, the grounding terminal at one end of the grounding wire is fixedly set in the electrical junction box, which improves the safety of the grounding wire and also plays the role of protecting the grounding wire, and the box is equipped with a fixed power line and control components. The slot position makes the installation of the power cord and control components more firm, and the entrance of the motor lead wire and power cord is arranged below the connection part of the live parts, making the structure more reasonable and the advantages obvious.

Description of drawings

Fig. 1 is a schematic structural view of the ventilation fan of the present invention.

Fig. 2 is a left side view of the ventilation fan of Fig. 1 .

Fig. 3 is a schematic diagram of the joint structure between the box cover and the box body of the electrical junction box of the ventilating fan in the prior art.

Fig. 4 is a schematic explanatory diagram of the joint structure of the box cover and the box body of the electrical junction box (4) of the ventilating fan of the present invention.

Fig. 5 is a perspective view of the box body structure of an embodiment of the electrical junction box of the present invention.

FIG. 6 is a rear view of FIG. 5 .

Fig. 7 is a front view of the cover structure of the electrical junction box of the present invention.

Fig. 8 is a P-P sectional view of Fig. 7 .

Fig. 9 is a perspective explanatory view of the box cover shown in Fig. 7 and Fig. 8 .

Fig. 10 is a schematic diagram of the installation of the electrical junction box of the present invention.

Fig. 11 is also a schematic diagram of the installation of the electrical junction box of the present invention, which is a view seen from the front.

Fig. 12 is an explanatory diagram of the waterproof effect of the electrical junction box of the present invention.

Detailed ways

Referring to Fig. 1, as previously mentioned, the ventilation fan of the present invention includes frame (1), motor (2), fan blade (3), ground wire (7), power cord (6), electrical junction box (4) and control Components (5). The motor (2) and the fan blade (3) are installed on the frame (1), and the motor drives the fan blade to rotate. A power line (6) and a control component (5) for implementing electrical control on the motor are installed in the electrical junction box (4). The terminal of the ground wire (7) is also placed in the electrical junction box (4), which is schematically shown in the figure. As shown in the figure, the electrical junction box (4) is placed at the lower right corner and is fixed on the frame (1), and it is installed vertically. The words "up and down" are marked in the figure, indicating the position of the electrical junction box (4). Referring to Fig. 2, Fig. 2 is the left view of Fig. 1, the dashed line on the left shows the condition that the three rain shields (1-2) of the ventilating fan are blown up when the ventilating fan is working, and the dashed line on the lower part of the right shows the electrical junction box The position of (4), also marked " up and down " among the figure, just clearly shows the vertical arrangement of electrical junction box (4) among Fig. 1 and Fig. 2.

Referring to Fig. 3, Fig. 3 is the combining structure situation of the box cover (442) of the electrical junction box (44) of prior art and box body (441), and they are combined together with the overcoat mode of flat border, this flat The structure of edging may cause the outside water to seep into the electrical junction box (44).

Referring to Fig. 4, Fig. 4 shows the explanatory diagram of main structural features of the electrical junction box (4) of the present invention, shows in the figure, described electrical junction box (4) comprises box cover (42) and box body (41), they It can be made, for example, of plastic, such as polypropylene, by injection moulding. It can also be made from other materials or by other methods. As shown in the figure, the electrical junction box is installed vertically on the frame. The so-called "vertical installation" means that the electrical junction box is installed vertically in the orientation shown in Fig. 1 and Fig. 2 . Show especially in the figure, except bottom edge, box body (41) is provided with vertical edge (41-2), is the vertical narrow plank shape vertical edge, and lid (42), except bottom edge, is provided with wrapping edge (41-2). The edge (42-2) structure, the edge (42-2) wraps up the vertical edge (41-2) of the box body, and covers it, especially wrapped on the outside of the vertical edge (41-2), so that Water cannot easily enter the upper interior of the electrical junction box of the present invention.

Referring to Fig. 5, Fig. 5 is an embodiment structure explanatory drawing of the box body (41) of electrical junction box (4) of the present invention, is a perspective view, clearly shows in the figure, in box body main body (41-1) There is an upright edge (41-2) on the upper left side of the top, and an upright narrow slat guide plate (41-3) on the far right. . Due to the setting of the vertical edge and the guide plate, its outer edge is wrapped by the hemming (42-2) of the box cover (42), and the electrical junction box as a whole has played an excellent waterproof effect, making it difficult for water to enter the main body of the box body The middle and upper part of the box body is provided with a recessed hole (41-4) in the middle of the main body of the box body, which is the position for placing the control assembly (5). There are two raised columns (41-7) at the entrance of the recessed hole for placing Put the control assembly (5) into the concave hole (41-4) and fix it with a column (41-7), and the entrance of the power line (6) is arranged at the groove (41-8) at the bottom right, The entrance of the motor lead wire is set at the notch on the upper plane of the lower left corner, and is introduced from the upper left side of the through hole (41-5) and the outer side of the upper hole wall, and is clamped through the clamping groove (41-6). The control assembly (5) is connected. The power line (6) can be connected to the control assembly (5) and the motor lead wires through the first notch (41-10). When the power cord (6) is inserted from the groove (41-8), it can be pressed by the cover plate of the groove (41-8) to be firmly fixed, and the ground wire grounding terminal in the power cord (6) passes through the second groove The port (41-9) reaches the grid position of the through hole (41-5), the through hole (41-5) corresponds to the corresponding part of the frame (1) of the ventilating fan, and the ground wire (7) is fixed in the lower part of the through hole (41-5) grid position, that is, the ground terminal is connected to the frame (1) at the through hole (41-5) grid position in the box of the electrical junction box (4), to play a grounding effect, like this, The grounding terminal is installed outside the electrical junction box (4) in the prior art, and is changed in the box of the present invention, and is covered by a box cover, so that it is not easy to be touched by hands, thereby making the ventilating fan safer and easier to assemble. It is more beautiful and more convenient. It is clearly shown in the figure that the electrical junction box (4) is provided with ground wire installation grids, slots for fixing power wires and control components, and motor lead wires and power wire inlets are arranged below the connection parts of live parts.

As mentioned above, the part covered by the box cover of the electrical junction box is provided with a ground wire installation compartment, and the ground terminal is a structure fixed on the frame.

Referring to Fig. 6, Fig. 6 is the rear view of Fig. 5, further clearly shows the structure of the vertical edge (41-2) of box body (41) and guide plate (41-3) among the figure, has shown that they are narrow The vertical slat structure, the position of the groove (41-8) of the power cord (6) inlet is also shown below.

Referring to Fig. 7 to Fig. 9, they have shown the structure of an embodiment of the box cover (42) of electrical junction box (4) of the present invention, and Fig. 7 is the front view of box cover (42), is from inside to outside look at the view. On the top right of the box cover (42-1) is the hemming (42-2) structure, and on the left is the guide groove (42-3), and Fig. 8 is a P-P cross-section of Fig. 7, viewed from the bottom up view. From the P-P sectional view of Fig. 8, they can clearly see the groove-shaped structure of the guide groove (42-3) on the left side and the groove shape of the wrapping (42-2) on the right and the "wrapping" of the wrapping edge (42-2) " Containing structure, the vertical edge (41-2) of box body (41) and guide plate (41-3) bag are covered. Fig. 9 is also a stereoscopic view of the lid (42) from the inside to the outside, and from the bottom to the top, it also clearly shows the groove shape of the guide groove (42-3) on the left and the wrapping (42-2) on the right ) groove shape and outsourcing structure.

Apparently, the structure of the outer cover effectively prevents the external water from leaking inward.

Referring to Fig. 10 and Fig. 11, Fig. 10 and Fig. 11 have shown the installation situation of electrical junction box (4) of the present invention respectively from the back and front, among Fig. 10, lid (42) is on, and box body (41) is below , the top surface of the box body (41) and the vertical edge (41-2) on the right side are clearly shown, and the upper part of the guide plate (41-3) on the left side has been covered by the guide groove (42-2) of the box cover (42). 3) included and disturbed inwardly so that the lid (42) can be easily assembled with the box body (41) using the guide groove (42-3), and the guide groove (42-3) of the lid (42) 3) Slide in from top to bottom along with the guide plate (41-3) of the box body (41) to be assembled into one body. Figure 11 further shows the fully slid-in state. Since this structure is covered from three directions, left, upper and right, it has excellent waterproof performance and is easy to slide into and assemble.

In the present invention, the ground terminal of the ground wire of the ventilation fan is arranged in the part covered by the box cover of the electrical junction box and fixed on the frame.

Referring to Fig. 12, Fig. 12 has shown the effect drawing of electrical junction box (4) of the present invention, and it is the A-A sectional view of Fig. 11, can see, when water is poured down, because the wrapping structure of the present invention, water Flow down from both sides of the outside, and will not flow into the electrical junction box (4).

Specific embodiments of the present invention have been described above. However, those skilled in the art should understand that various modifications or changes can be made to the present invention without departing from the spirit and scope of the present invention.

Claims (10)

1. ventilation fan, comprise framework (1), motor (2), flabellum (3), ground wire (7), power line (6), electrical appliance junction box (4) and control unit (5), wherein said electrical appliance junction box (4) is vertical to be installed on the described framework (1), described power line and control unit (5) are installed in the described electrical appliance junction box (4), and described electrical appliance junction box (4) comprises lid (42) and box body (41), it is characterized in that, the lid of described electrical appliance junction box is provided with edge structure, and the bound edge of described lid (42-2) wraps in outside the upright edge (41-2) of described box body.

2. ventilation fan according to claim 1 is characterized in that,, the lid (42) of described electrical appliance junction box (4) is a sliding motion structure with box body (41).

3. ventilation fan as claimed in claim 2 is characterized in that, the structure that the lid (42) of described electrical appliance junction box (4) engages with the sliding type of box body (41), glide direction are served as reasons and gone up to lower slider.

4. ventilation fan as claimed in claim 1 is characterized in that, the ground terminal of the ground wire of described ventilation fan is to be placed in the position that the lid of described electrical appliance junction box is covered with, and is fixed on the structure on the framework.

5. an electrical appliance junction box (4), but built-in power line and control unit comprise lid (42) and box body (41), it is characterized in that, the lid (42) of described electrical appliance junction box (4) is provided with edge structure (42-2), and the bound edge of described lid wraps in outside the upright edge (41-2) of described box body (41).

6. electrical appliance junction box as claimed in claim 5 (4), it is characterized in that, the structure that described lid (42) and box body (41) engage for sliding type, one side of box body (41) is provided with guide plate (41-3), lid (42) is gone up a corresponding side and is provided with guide groove (42-3), and this guide groove (42-3) slides with guide plate (41-3) with matching.

7. electrical appliance junction box as claimed in claim 6 (4) is characterized in that, the structure that described lid (42) engages with the sliding type of box body (41), glide direction are served as reasons and gone up to lower slider.

8. electrical appliance junction box as claimed in claim 5 (4) is characterized in that, is provided with ground wire in the position that the lid of described electrical appliance junction box is covered with case is installed, and ground terminal is installed the framework that the case place is connected to ventilation fan at described ground wire.

9. electrical appliance junction box as claimed in claim 5 (4) is characterized in that, is provided with the groove position of fixed power source line and control unit in the described electrical appliance junction box.

10. electrical appliance junction box as claimed in claim 5 (4) is characterized in that, motor leads and power line inlet are laid in the below of control unit riding position.

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