JPH03188959A - Device for preventing electric shock in electrical dust precipitator - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

Detailed Description of the Invention (Industrial Application Field) The present invention is an electrostatic precipitator that quickly dissipates residual charge when removing a dust collection element to prevent electric shock from occurring. The present invention relates to an electric shock prevention device, and particularly to the above-mentioned electric shock prevention device suitable for application to a ceiling-embedded electrostatic precipitator.

(Prior Art) Electrostatic type electrostatic precipitators, which charge dust floating in the air and then collect the dust by electrostatic electrodeposition, require the dust collecting part to be taken out and cleaned or replaced. It has a structure that allows most of it to be put in and taken out.

By the way, since a high voltage is applied to the anode side of the dust collector that is taken out and taken out in this way, there is a residual charge, so as a measure to prevent the risk of receiving an electric shock when taking out the dust collector, conventionally, the main body of the dust collector was When the lid is opened, a short-circuiting mechanism is activated to remove the residual electric charge (Jikkoaki,
15-29657, Japanese Patent Application Laid-Open No. 60-261561), and a self-discharge resistor connected in parallel to the high-voltage power supply circuit of a precipitator to immediately discharge electricity when the operation is stopped (Japanese Utility Model Publication No. 54-20692) Safety devices such as

However, in the safety device proposed in the above-mentioned Japanese Utility Model Publication No. 45-29657, since the picture electrodes only come into contact with each other due to their own weight, the contact itself is unstable and there is still the risk of being shocked by the electric charge when taking out the dust collection section. Also, JP-A-6
The safety devices proposed in Publication No. 0-261561 and Publication No. 54-20692 have the advantage that discharge occurs instantaneously when the dust collection section is a parallel plate type structure with small capacitance and inductance. However, if the dust collection section has a structure in which the anode is molded with an insulator and placed close to the dust collection plate, dielectric polarization may occur in the insulator during dust collection operation. Because of this, the residual charge does not disappear for a long time even after the operation is stopped. Therefore, even if the anode and the dust collection plate are short-circuited on the main body side and the dust collection part is removed, the residual charge remains on the surface of the anode. It was discovered that there is an electric charge, and this causes a high voltage to be generated between the anode and the dust collector plate, often resulting in electric shock.

Moreover, recently, as shown in Figure 6, they are installed in the ceiling, with both ends facing the opening in the ceiling board, and the inlet (22) and outlet (
A dust collector unit (24) as an air purifier and a cooler unit (25) are interposed in series from the windward side in the air duct l-(21) formed in the air duct L-(23). A pre-filter (26), an electrostatic deposition type dust collection element (27), and a high voltage generator (not shown) are housed in the main casing (28), while the cooler unit (25) is equipped with a fan (29). and Kula (30
) is housed in the casing (31), and the suction port (22)
After the indoor air sucked in by the dust collector Uniso (24) is cleaned by collecting dust, etc., it is cooled to a predetermined temperature by the Tara Unisoto (25) and then blown into the room as cold air from the outlet (23). A so-called ceiling-embedded type has been proposed, which allows air conditioning to be carried out, but in this type of device, the dust collector unit, the electric precipitator, usually has multiple dust collectors as shown in the figure. The dust collection element (27) is installed in conjunction with the dust collection element (27).
7) When taking out the lid, it is not suitable for applying a safety device that operates in conjunction with opening and closing of the lid, as it is pulled out to the side in a connected state.

Therefore, the present applicant focused on the above-mentioned problems, and in order to improve the problem, the applicant made further studies and installed a short-circuit between the anode and the dust collecting electrode plate in the dust collecting part itself, which has a structure that allows it to be taken out and taken out. I suggested earlier that it be equipped with a switch that can be used to gain power.

(Patent Application No. 1-1) 7977) (Problem to be Solved by the Invention) However, although the switch according to the above proposal can prevent electric shock in conjunction with the removal of the dust collection element,
However, this method is still insufficient to be applied to an electrostatic precipitator including a plurality of dust collecting elements embedded in a ceiling as described above.

Thus, the present invention deals with the above-mentioned points, and aims to further expand the electric shock prevention device proposed above so that it can be applied to a ceiling-mounted dust collector in which a plurality of dust collection elements are connected. A ground switch is installed on each dust collection element to ensure continuity between the frame and anode when the element is taken out, and a ground switch lever is installed so that the dust collection element can be slid and installed, and a sufficient insulation distance is maintained when the casing is installed. This is intended to effectively prevent electric shock even when a plurality of dust collecting elements are housed.

(Means for Solving the Problems) In order to meet the above objectives, the present invention basically consists of a frame (9).
In an electrostatic precipitator, a dust collection element (1) made of a conductive material is attached to an element accommodating part (2) of a main body casing so as to be removable. a contactor a0 biased in the direction;
A high-voltage connection terminal (10) that the contactor Q4) comes into contact with when it rotates forward, and a high-voltage connection terminal (10) that contacts the contactor α at one end and protrudes from the dust collection element frame (9) at the other end and slides in the axial direction. Each of the dust collecting elements (1) is provided with an earth switch lever Oe that is movable and rotates the contactor (14) in the reverse direction by sliding against the spring 0ω, and the Earth switch lever 06)
The electric shock prevention device is characterized by a configuration in which a mountain-shaped earth switch guide α mark along the direction in which the dust collection element is taken in and taken out is provided at a position opposite to the dust collecting element.

Further, the present invention applies the above-mentioned electric shock prevention device to an electric precipitator in which a plurality of dust collection elements are connected, and the dust collection elements (
1) are connected and attached to the element accommodating portion (2) so that they can be inserted and removed in the connection direction by sliding, and the mounting position of the earth switch lever Qe of each element is set so that each earth switch lever (1) is connected when the element is inserted or removed by sliding.
6) pass through different parts of the accommodating part (2), and a plurality of mountain-shaped earth switch guides αψ corresponding to each earth switch lever Q61 are arranged to accommodate elements corresponding to each earth switch lever (16). Part (2
) It is characterized by being installed on the inner wall.

(Function) In the electric shock prevention device according to the present invention configured as described above, when the dust collection element is taken out from the element storage part, the earth switch guide contact side of the earth switch lever becomes a free end, and the contactor is rotated by the spring. , to be bonded to the high voltage connection terminal.

The contact terminal is connected to the anode plate of the dust collection element, and the dust collection electrode is connected to the frame. Therefore, by joining the two as described above, the contact can be connected to the earth switch lever and through the frame. This state is held by the spring and the remaining charge is completely discharged.

Further, when a plurality of dust collection elements are connected in series according to the invention described in claim 2 and the electric shock prevention device is attached to each element, the positions of the earth switch lever and the earth switch guide are changed. When pulling out each element, the earth switch lever of each element does not engage with the earth switch guide of other elements, so the dust collection elements do not interfere with each other and are maintained in the short-circuited state as described above. , the residual charge is discharged.

(Example) Hereinafter, an example of the present invention will be described based on the accompanying drawings.

Figure 1 shows the main part configuration of an electrostatic precipitator equipped with the device according to the present invention, in which the dust collector Niremen I-(1) can be slid in and out of the element storage part (2) of the main body casing. It is installed.

As shown in FIG. 4 (a) and (b), the dust collection element (1) consists of an ionization section (5) consisting of an ionization wire (3) and an opposing ground electrode plate (4), an anode plate (6), and an anode plate (6). Dust collection electrode plate (7)
It has a known structure in which flat elliptical dust collection parts (8) are arranged in front and back, each of which is arranged in the front and back, and each part has an outer frame (9A) which is a rectangular short cylinder. ),
(9B) is housed inside and is integrally formed as shown in Figs. 1 and 2, and the ionization line (3) has a
A series high voltage of, for example, 2KV is applied to the anode plate (6), respectively, so that the opposite ground electrode plate (4),
An electrostatic electric field is formed between it and the grounded dust collecting electrode plate (7).

Here, the outer frame (98) of the ionization section (5) and the dust collection section (8) are shown.
) are both molded from conductive material such as sheet metal, and the outer frame (9A) of the ionization part (5) has the opposing ground electrode plate (4), and the outer frame (9A) of the ionization part (5) has the opposite ground electrode plate (4), and the outer frame (9B) of the dust collection part (8) The dust collection electrode plates (7) are each grounded to the outer frame (9B), and each outer frame (9B) is also grounded.

Below (9A) there are further connection terminals (10), (
10)' are protruding from each other, and these connection terminals (1
0), (10)' are each outer frame (9B), (9A)
The ionization wire (3) is connected to the ionization section (5) and the anode plate (6) is connected to the dust collection section (8).

Then, the dust collection element (1) consisting of the ionization part (5) and dust collection part (8) that are integrally combined is placed on the rail αυ formed by installing it in the main body casing as shown in FIG. It can be slid along the rail aO and can be put in and taken out freely.

However, in the above-mentioned configuration, the present invention has an earth switch lever Oe and a support member aη as shown in FIGS. A switch is provided.

In other words, in Fig. 2 (A) and (I+), (10 is a contact, which is rotatably supported on a support shaft installed in the dust collecting section (8), and whose rotation is supported by a spring α. is in the positive direction (
This spring 05
), one end of the contactor 0 can be engaged with one end of the connection terminal QOI. On the other hand, the spring (15) is attached to the other end side of the contactor 041.
) The metal earth switch lever Oe that rotates the contactor 04) in the opposite direction (rotation to the right in the figure) has one end in contact with the contactor Oa, and the other end in contact with the dust collecting element I - The dust collection element (1) is secured to the frame (9) with a screw or the like as shown in Fig. 3 by a support member a'0 so as to protrude outward from the frame (9) and slide in the axial direction. Supported.

0 is an earth switch guide corresponding to the earth switch lever 0[9, which is arranged in a mountain shape on the inner wall of the element accommodating portion (2) corresponding to the earth switch lever θe, and is usually made of metal. The dust collection element (1) is placed in the element housing part (2) along the rail aυ.
When the earth switch lever αe is stored in the housing, the protruding end of the earth switch lever comes into contact and presses the earth switch lever αe inward.

Thus, when storing the dust collection element (1) in the housing part (2), the earth switch guide O is
The earth switch lever θ6) is pushed inward by the chevron-shaped protrusion of gl, and as a result, the contact 0L1) rotates against the spring 0ω, and the connecting terminal (10) and the contact 04
) are separated from each other, allowing normal operation of the dust collector.

On the other hand, when the dust collection element (1) is pulled out to the side, the protruding end of the earth switch lever (16) becomes the free side, so the contact 04) is rotated by the spring θω, and the contact 04) is rotated by the spring θω. α^ and high voltage connection terminal α0) are joined, and the frame (
9) and the anode plate (6) are electrically connected, a short circuit occurs between the anode plate (6) and the dust collecting electrode plate (7), and a complete discharge 1 2- of the residual charge is realized.

Above, we have explained the case where there is one earth switch lever α0 and one earth switch guide αl, respectively, as the basics of the electric shock prevention device of the present invention. However, for example, in the case of a ceiling-mounted air conditioner that stores multiple dust collection elements (1) connected together as shown in Figure 6, the number of dust collection elements (1) is equal to the number of dust collection elements (1). can be placed.

FIG. 5 shows a specific example of such a case, where a ground switch lever Ql and a ground switch guide 0 are installed corresponding to each dust collection element (1), (1). It becomes necessary to prevent the earth switch lever Q[fl and the earth inch guide 0 of each dust collecting element (1) from interfering with each other.

Therefore, as shown in the figure, each dust collection element (1)
The positional relationship between the earth switch lever Q61 and the earth switch guide a is that when sliding the element in and out in the connection direction, each earth switch lever (10
Each earth switch lever (10) is provided so that the elements pass through different parts of the accommodating part (2), and earth switch guides Om are respectively provided on the inner wall of the element accommodating part (2) corresponding to the earth switch lever αe, Earthing switch lever (2) on the dust collector l-(1) on the left side of the diagram
The positions of the ground switch guide Q[ll] and the ground switch guide Q[ll are higher than those of the dust collection element (1) on the right side of the figure.

Of course, in FIG. 5, the heights are given as high and low, but depending on the sliding direction of the plurality of dust collecting elements, they may be shifted to the left or right, or it is also possible to use both together.

In this way, even when the dust collecting elements are connected, it is possible to prevent electric shock to the individual dust collecting elements in the same manner as in the above case.

(Effects of the Invention) As described above, the present invention includes a contact element that connects and separates from a high-voltage connection terminal, and a ground switch/notch lever that rotates the contact element, respectively, which are installed in the dust collection element, and a ground switch guide is installed in the dust collection element. is provided in the element accommodating part, and the earth switch lever is brought into contact with and separated from the earth switch guide as the dust collection element is inserted and taken out.The dust collection element is collected by the contact and separation of the earth switch lever and the earth switch guide. When pulled out and separated from the element accommodating part of the main body casing of the dust container, the contactor connects with the high voltage connection terminal, which quickly discharges the residual charge and neutralizes the charge, resulting in the risk of electric shock. Therefore, an extremely safe electrostatic precipitator can be obtained.

According to the invention as claimed in claim 2, each of the plurality of dust collecting elements is provided with an earth switch lever so that each earth switch lever passes through a different part of the housing part when the element is slid in and out. Since they are provided in accordance with this, there is an effect that when the dust collecting elements are pulled out, each of the dust collecting elements does not engage with other earth switch levers, and a complete discharge of the residual charge is reliably achieved for each of the dust collecting elements.

[Brief explanation of drawings]

Fig. 1 is a schematic perspective view showing the main structure of an electrostatic precipitator equipped with a device according to the present invention, and Fig. 2 (a) and (o) show an earth switch lever and an earth switch guide, which are the features of the present invention. In the diagrams showing the relationship between the two, (a) is when the dust collection element is stored, and (a) is when it is taken out. Figure 3 is a perspective view of the earth switch lever, and Figure 4 is a perspective view of the earth switch lever.
In the exploded view of the dust collection element, (a) is the ionization part, (
Il+) indicates a dust collection section. Further, FIG. 5 is a perspective view of a dust collection element installed with the device of the present invention in the case of a ceiling-embedded type air conditioner, and FIG. 6 is a schematic explanatory diagram of a ceiling-embedded type air conditioner. (1) Dust collection element, (2) Element housing, (9) Frame, Ql High voltage connection terminal, 041 Contact, α9 Spring , Q6)...Earth switch lever Q8)...Earth switch guide. 5 6 Ward size■＼

Claims (1)

[Claims] 1. The frame body (9) is a dust collection element (
In an electrostatic precipitator in which 1) is removably attached to an element housing part (2) of a main body casing, a contact element is rotatably supported on a support shaft and biased in the forward rotation direction by a spring (15). (14), a high-voltage connection terminal (10) that the contact (14) comes into contact with when the contact (14) rotates forward; one end contacts the contact (14) and the other end contacts the dust collection element frame (
9) A ground switch lever (16) that protrudes from the dust collection element (1) and is slidable in the axial direction and rotates the contactor (14) in the reverse direction by sliding against the spring.
and a mountain-shaped earth switch guide (18) along the direction in which the dust collection element is taken in and taken out is provided at a position facing the earth switch lever (16) on the inner wall of the element housing part (2). Electric shock prevention device for dust collector. 2. A plurality of the dust collection elements (1) according to claim 1 are connected together and installed in the element accommodating portion (2) so that they can be taken in and out in the connection direction by sliding, and the installation position of the earth switch lever (16) of each element is set as follows. Each earth switch lever (16) is made to pass through a different part of the housing part (2) when the element is taken in and taken out by sliding, and a plurality of mountain-shaped earth switch guides (18) corresponding to each earth switch lever (16) are provided. An electric shock prevention device for an electrostatic precipitator, characterized in that: is provided on the inner wall of an element housing part (2) corresponding to each earth switch lever (16).