JPH0461942A - Electric dust collecting type air cleaner - Google Patents

Abstract

PURPOSE:To ensure an electrical connection between a filter and ground terminals by a method wherein ground terminals are pressed by a filter frame into contact with a conductive body of a filter. CONSTITUTION:When a filter frame 2 is mounted on an air cleaner body 6, a grille 63 provided with the peripheral wall enclosing a discharge device 4 is removed and the filter frame is inserted from below into a filter receiving part 66 defining a space between the discharge device 4 and the air cleaner body 6. Upon insertion of the filter frame 2 in this way, the one side of a ground terminal 3 is pressed by the filter frame 2 so as to rotate the ground terminal. As a result, a contact piece 37 of a terminal plate 35 comes in contact with a resilient ground terminal 47 projected from the discharge device 4 and a terminal piece 38 moves into a biting contact with a conductive sheet 14 of the filter l through a window formed in the filter frame 2.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to an electrostatic precipitator air cleaner, and particularly to a contact structure between a conductor part of a dust collecting filter and a grounding terminal.

[Conventional technology]

Electrostatic precipitator air purifiers apply a high voltage of about 6,500 V between a discharge electrode and a counter electrode plate facing the discharge electrode to cause corona discharge, thereby reducing the amount of corona contained in the air flow passing between the two electrodes. Dust particles are charged, and the charged particles are collected by a filter that is equipped with a conductor and connected to a ground electrode. For this purpose, the filter used here must be able to be cleaned and replaced, and at the same time the electrical conductor of the filter must be connected to a grounding pole. . An example is shown in FIG. 21 and below. As shown in FIG. 22, the filter 1 includes a dust removal filter 11 which is bent into a corrugated plate shape and is made of a nonwoven fabric such as polypropylene fiber or polyester fiber, and a trough on one side of the dust removal filter 11 is filled. A granular deodorizing filter 12 made of activated carbon or the like, a cover 13 made of a breathable sheet to prevent the deodorizing filter 12 from falling off, and a conductive sheet 14 provided on one surface of the dust removing filter 11. It is formed as consisting of. Since this filter 1 is flexible, in order to ensure that it can be attached to the purifier body without compromising the ease of attachment and detachment for cleaning or replacement, a filter frame is attached. 2 to be set in the air purifier main body 6. As shown in FIGS. 21 and 23, this filter frame 2 consists of a rectangular main body 20 and a contact spring 25 attached to the main body 20. The main body 20 is integrally formed on one side of the main body 20. In addition to having a crosspiece 21, a handle 23 is provided at the center of the side surface, projections 24 are provided at both ends, and a plurality of presser projections 29 are provided on the surface opposite to the surface on which the crosspiece 21 is provided. ing. In the figure, reference numeral 22 denotes a reverse insertion prevention protrusion that prevents reverse insertion when inserting and setting the filter frame 2 into the air purifier main body 6. One end of the contact spring 25 in the filter frame 2 is caulked and fixed to the main body 20, the central part bent in a dogleg shape protrudes laterally from a notch 28 provided on the end surface of the main body 20, and the other end edge is serrated. As shown in FIG. 24, when the filter frame 2 is set in the purifier main body 6, the contact terminal 27, which is the part that is caulked and fixed at one end of the contact spring 25, is connected to the contact terminal 27. 26 contacts the grounding terminal 47 of the discharge device. Also, the filter 1 is the crosspiece 21
It is fixed to the filter frame 2 by being sandwiched between the front and back by two presser protrusions, and the filter frame 2 with the filter 1 mounted in this way is slid into the filter storage part 66 in the purifier main body 6. When inserted, the side wall of the filter housing 66 presses the contact spring 25 protruding from the filter frame 2 and pushes the contact terminal 27 inward.
6 to make an electrical connection with the terminal portion 16 of the conductor sheet 14 of the filter 1 exposed on the side surface of the filter 1.

[Problem to be solved by the invention]

However, the presence of the contact spring 25 in the filter frame 2 is an obstacle when fitting the filter 1 into the filter frame 2, and sometimes the filter 1 covers the contact terminals 27 of the contact spring 25, causing the filter 1 to be deformed. This sometimes results in insufficient electrical connection, resulting in a situation where the electrostatic precipitator function cannot be fully obtained. The present invention has been made in view of these points, and its purpose is to provide an electrostatic precipitator air system in which the filter can be easily attached and detached, and the electrical connection between the filter and the grounding terminal can be ensured. There are purifiers available.

[Means to solve the problem]

Therefore, in the present invention, the purifier main body is provided with a filter housing portion into which a filter frame is detachably attached, and a grounding terminal electrically connected to a conductive portion of the filter held by the filter frame. The electrostatic precipitator air cleaner is characterized in that the terminal is formed as a movable member that is pressed by the filter frame, protrudes into the filter frame, and comes into contact with the conductor portion of the filter. [Function] According to the present invention, the terminal comes into direct contact with the filter, so there is no need to pay any attention to electrical connections when attaching the filter to the filter frame, and the filter frame can be cleaned easily. When attached to the main body of the filter, the terminals pressed by the filter frame come into contact with the conductive portion of the filter, making it possible to obtain a reliable electrical connection. [Embodiment] The present invention will be described in detail below based on the illustrated embodiment. The purifier main body 6 of this electrostatic precipitator air purifier has a suction port on the front side and a motor 61 arranged on the back side. and fan 6
2, in order from the front side, a grill 63, a discharge device 4,
A filter 1 is installed. The filter 1 here includes a dust removal filter material 11, a deodorizing filter material 12, a cover 13, and a conductive sheet 14, as in the conventional example, and the dust removal filter material 11 is made of polypropylene fibers. It is formed of a fiber filter bent into a corrugated plate shape made of non-woven fabric such as polyester fiber or polyester fiber, and as shown in FIG.
It is equipped with The deodorizing filter material 12 is a granular material made of activated carbon or the like, and is filled in each valley on one side of the dust removing filter material 71, and covered with a cover 13 which is a breathable sheet made of non-woven fabric. The discharge device 4 has a discharge electrode 41 and a return electrode plate 42 fixed to a fixed frame 40 fixed to the purifier main body 6, and the fixed frame 40 has a pressing rib 44 for fixing the filter 1 at its end.
It is equipped with Now, if the fan 62 is driven to draw air from the grille 63 side, dust particles in the air will be removed by the corona discharge between the discharge electrode 41 and the return electrode 42 to which a high voltage of about 6500V is applied in the discharge device 4. The charged particles are collected by the dust removal filter material 11 connected to the ground electrode of the discharge device W4 in the filter 1, and then the odor is removed from the air that comes into contact with the deodorization filter material 12. The rectangular filter 1 is set in the air purifier main body 6 via the filter frame 2. As shown in FIG. 7, the filter frame 2 has a crosspiece 2 on one side of a rectangular main body 20.
1 is integrally provided with a plurality of presser protrusions 29 on the opposite surface, and when the filter 1 is fitted, the filter 1 is fixed between the crosspiece 22 and the presser protrusions 29. Ru. On the other hand, the grounding terminal 3 shown in FIGS. 3 and 4 is disposed above the filter accommodating portion 66 in the purifier main body 6. This grounding terminal 3 consists of a bell crank type lever 30 that is rotatably supported by a shaft 69 protruding from the purifier main body 6 side, and a terminal plate 35 that is fixed to this lever 30. As shown in FIG. 5, the lever 30 is formed with a mounting hole 31 on the negative side and a positioning hole 32 on the other side, and the terminal plate 35 is provided with the lever 30 as shown in FIG. It is equipped with a mounting piece 36 that is inserted and fixed into the mounting hole 31 of the lever 30, a contact piece 37 arranged in the positioning groove 32 of the lever 30, and a terminal piece 38 for contacting with the filter 1. When the filter frame 2 is not attached to the grounding terminal 3 configured in this way, as shown in FIG. I have evacuated to a position where it will not occur. As described above, the filter frame 2 does not include a relay member for electrical contact, and therefore the filter 1 can be easily attached to the filter frame 2. The work of attaching the filter frame 2 to the purifier body 6 involves removing the grill 63 that has a peripheral wall surrounding the discharge device 4, and attaching it to the filter housing 66, which is the space between the discharge device 4 and the purifier body 6. This is done by inserting it from below in Figure 1, and when the filter frame 2 is inserted in this way, the filter frame 2 presses one side of the grounding terminal 3 as shown in Figure 3 (6). As a result, the contact piece 37 of the terminal plate 35 rotates the grounding terminal 3 with a spring property protruding from the discharge device 4.
7, and the terminal piece 38 comes into contact with the conductive sheet 14 of the filter 1 through the window formed in the filter frame 2 by biting into it. When the lever 30 is formed of a conductive material, the terminal plate 38 can be omitted by forming a terminal piece 38 on the lever 3o, as shown in FIG. As shown in FIG. 10, a pinion 34 is formed on the lever 3o, and a rack 28 is formed on the side surface of the filter frame 2 as shown in FIG. As shown in FIG. 12, the terminal 3 may be rotated by the engagement between the pinion 34 and the rack 28, and the terminal piece 38 may come into contact with the filter 1. FIGS. 13 and 14 show still other embodiments,
A projecting piece 33 is protruded from one end of the lever 30. Also,
Here, the purifier main body 6 is equipped with a limit switch 9 that is pressed and driven by a rib 68 that protrudes from the grille 63, and when the filter frame 2 is not attached, as shown in FIG. 14(b). , the protrusion 33 of the lever 30
covers the limit switch 9 to prevent the rib 68 of the grille 63 from driving the limit switch 9. If the power can be turned on only when the limit switch 9 is activated, in this case, the filter frame 2 should be attached, the protrusion 33 should be removed from the limit switch 9, and the grille 63 should be attached. If so, you will not be able to turn on the power. The rib 68 protruding from the grille 63 may press the protruding piece 33 in the direction in which the terminal piece 38 comes into contact with the filter 1, as shown in FIGS. 15 and 16. The contact between the terminal piece 38 and the filter 1 becomes even more reliable. By the way, the pressing rib 44 on the fixed frame 4 of the discharge device 4
is the filter frame 2 inserted into the filter storage section 66
is pressed against the purifier main body 6 side to fix the filter frame 2, and together with the grill 63 which covers the periphery of the filter frame 2 with a peripheral wall, the filter accommodating portion 66 is passed through without being passed through the filter 1. This is to prevent wind from forming, but if the contact surface of the pressing rib 44 with the filter frame 2 is made into an arcuate surface as shown in FIG. 17, the resistance when attaching and detaching the filter frame 2 can be reduced. can be further lowered, and the filter frame 2 can be attached and detached even more smoothly. Further, as is clear from FIG. 18, the return electrode plate 42 of the discharge device 4 is formed by punching and bending two metal plates. If the inclined surface 46 is interposed in the part, the first
As shown in Figure 9, the flow of air becomes smoother, the amount of air can be increased, and noise is less likely to be generated. As shown in FIG.
If 6 are butted together to form a mountain shape, the air resistance will be further reduced.

【Effect of the invention】

As described above, in the present invention, the terminals are in direct contact with the filter, so there is no need to pay any attention to electrical connections when attaching the filter to the filter frame, and the filter frame is cleaned. When attached to the main body of the filter, the grounding terminal pressed by the filter frame comes into contact with the conductive part of the filter, so a reliable electrical connection can be obtained, and it is effective for collecting charged dust particles. will be ensured.

[Brief explanation of the drawing]

Figure 1 is a sectional view of one embodiment of the present invention, Figures 2 (a) and (b)
3(a) and 3(b) are cutaway front views of the filter storage section, FIG. 4 is a perspective view of the terminal, and FIG. 5 is a perspective view and side view of the same as above.
Figures (a), (b), and (e) are a side view, front view, and perspective view of the lever, Figure 6 (a), (b), and (c) are a side view, front view, and perspective view of the terminal board, and Figure 7. (a) and (b) are a front view and a sectional view of the filter frame, FIGS. 8(a) and (b) are a front view and an enlarged sectional view of the filter, and FIG. 9 is a perspective view of another example of the terminal.
FIG. 10 is a perspective view of a lever in another embodiment;
The figure is a front view of the same filter frame as above, and Fig. 12(a)(b)
) is a front view showing the same operation as above, FIG. 13 is a perspective view of a terminal of another embodiment, FIGS. 14(a) and (b) are cutaway front views showing the same operation as above, and FIGS. 17 is a sectional view showing another example of the pressing rib of the fixed frame of the discharge device, FIG. 18 is a broken perspective view of the return electrode plate, and FIG. )(b) is a front view and a sectional view of the same as above, FIGS. 20(a) and 20(b) are a front view and a sectional view showing another example of the return electrode, and FIG. 21 is a perspective view of a conventional filter and filter frame. , FIG. 22 is a cross-sectional view of the same filter, and FIG.
3 is a partial front view of the filter frame same as the above, and FIG. 24 is a partial front view of the filter storage part same as the above, where 1 shows the filter, 2 the filter frame, 3 the terminals, and 6 the purifier main body. Agent Patent Attorney Ishi 1) Chief 72 Filter frame Figure 3 (a) (b) Figure 4 Figure 5 <a> (b) (c) Figure 7 1 So Figure 6 (b) Figure 9 Figure 10 Figure 15 Figure 16 Figure 19 (a) Figure 17 Figure 18 Figure 20 (a) (b') Figure 22 Figure 23 Figure 21 Figure 24 Procedural amendment (voluntary) August 31, 1990 1990 Patent Application No. 167901 2 Name of the invention Electrostatic precipitator air purifier 3 Name of address related to the case of the person making the amendment Name 4 Postal code of the agent

Claims (1)

[Claims] (1) An electric dust collector in which the purifier body is equipped with a filter storage part into which a filter frame is detachably attached, and a grounding terminal electrically connected to the conductor part of the filter held by the filter frame. An electrostatic precipitator air purifier, characterized in that the terminal is formed as a movable member that is pressed by the filter frame, protrudes into the filter frame, and comes into contact with the conductor portion of the filter.