JPH0137709Y2 - - Google Patents

Description

[Detailed explanation of the idea]

INDUSTRIAL APPLICATION FIELD The present invention relates to an electrostatic precipitator for air purification that charges dust and collects it by electrically adsorbing it. Conventional technology Conventionally, this type of electrostatic precipitator uses high voltage, so in order to prevent danger, the power must be cut off even if any opening/closing part of the dust collector body is opened, and the high voltage must be short-circuited. This is stipulated by the Electrical Appliance and Material Control Law. Therefore, a limit switch that turns off the power in conjunction with each opening/closing section, and a short circuit mechanism that shorts the high voltage are provided individually for the number of opening/closing sections. Problems that the invention aims to solve In such a conventional configuration, the failure rate increases due to the large number of safety mechanisms, and the wiring of the limit switch becomes complicated, making it difficult to assemble. The problem was that the cost of parts and materials was high. The object of the present invention is to provide an inexpensive electrostatic precipitator with a reliable safety mechanism. Means for Solving the Problems The electrostatic precipitator of the present invention has a dust collector main body provided with multiple opening/closing parts such as a filter and a front grill,
A buckle body is provided to engage the dust collector main body and the front grill, and when the front grill is removed from the dust collector body, the buckle body is biased by a spring body and one end of the buckle body is attached to the filter. The buckle body is made to protrude from the opening/closing part to prevent the filter from being inserted into the dust collector body, and the buckle body is rotated by the front grill against the spring body when the front grill is attached to the dust collector body. The front grille is engaged with the dust collector body to enable insertion of the filter into the dust collector body, and the filter inserted into the dust collector body comes into contact with the buckle body to restrict rotation of the buckle body. The dust collector body is configured to be held at a position where engagement between the dust collector main body and the front grill is maintained. Function According to this configuration, by devising the shape of the buckle body in multiple opening/closing parts, the opening/closing order of the opening/closing parts can be changed so that if the first opening/closing part (filter) is not opened, the other opening/closing part (front grille) is opened. ) can be prevented from opening, and by providing a limit switch and a short-circuit mechanism linked to the first opening/closing part (filter), it is possible to eliminate the need for all opening/closing parts. Examples will be described with reference to the drawings. In FIGS. 1 to 13, 1 is a front body that fixes built-in parts and forms a part of the outer shell, and 2 is a rear body that faces this front body 1 and forms the outer shell. A front grill 3 is removably attached to the entire surface. A counter electrode 5 facing the discharge wire 4 supported on the front body 1 is provided on the front grill 3 as a prefilter 6.
They are fixed as shown in Figures 2 and 3 with the two sides in between. The front grille 3 has intake holes 7 formed therein. Reference numeral 8 denotes a blower, which is composed of a motor 9 and a fan 10, and is held between a front body 1 and a rear body 2. Reference numeral 11 denotes an intake port, 12 a fan casing, and 13 an exhaust duct, which form an air passage for exhausting air through a louver 14, as shown in FIG. A high voltage unit 15 supplies the high voltage generated here to the discharge wire 4 via a discharge wire support plate 16. 17 is a discharge wire protection tube, and 18 is a discharge wire attachment spring.
Reference numeral 19 denotes a main body switch, which can be operated by either a push button 20 or a pull string 21. Reference numeral 22 denotes a limit switch, which operates only when the filter 23 is almost completely inserted into the dust collector body, as shown in FIG. 13, and otherwise turns off the power. 24 is a shorting plate, and as shown in FIGS. 4 and 6, due to the attachment 25, the shorting plate spring 26, and the rotating shaft 27, the discharge wire support plate 16 is always closed when the filter 23 is not inserted into the dust collector body.
It is rotatably attached to the front body 1 so as to come into contact with the front body 1. As shown in FIG. 5, the filter 23 includes a filter frame 28, a dielectric filter 29, and a fibrous activated carbon filter 3 attached to its rear stage.
0 and a filter metal fitting 31 attached to the filter frame 28 and in conductive contact with the fibrous activated carbon filter 30. When the filter 23 is completely inserted into the dust collector body, the shorting plate 24 and the filter metal fitting 31 are installed so that they touch each other. 32 is an earth spring, which is attached to the mounting plate 2.
5, and the front grill 3 is formed so as to come into contact with the counter electrode 5 as shown in FIGS. 5 and 6 when it is inserted into the main body of the dust collector. The mounting plate 25 is electrically connected to the ground side of the high voltage unit 15. 33 is a buckle body, which is attached to the front body 1 as shown in FIGS. 7 to 10.
When the front grille 3 is inserted, it is biased by the buckle spring 34, and the locking pawl 35 of the front grille 3 and the buckle body 33
The engaging portion 36 is engaged. 37 is an attachment/detachment button, and when this is pressed, the buckle body 33 rotates.
The engagement between the locking pawl 35 and the locking portion 36 is released, and the front grill 3 can be removed from the front body 1. The buckle body 33 has a filter stop protrusion 38,
A rotation stop protrusion 39 is formed, and when the front grill 3 is not present, the filter stop protrusion 38 protrudes into the filter opening/closing part 40, preventing the filter 23 from being completely attached to the dust collector body, and the limit switch 22 does not turn ON. . In addition, the rotation stopper protrusion 3
9 does not protrude into the filter opening/closing part 40 at all when the front grill 3 is inserted, similar to the filter stopper protrusion 38, and when the filter 23 is fully inserted, it almost contacts the filter frame 28 and even when the attachment/detachment button 37 is pressed. The buckle body 33 cannot be rotated. That is, the front grill 3 is formed so that it cannot be removed. In the electrostatic precipitator having such a configuration, dust-containing air taken in through the intake hole 7 of the front grille 3 is charged with dust due to corona discharge caused by a high voltage being applied between the discharge wire 4 and the counter electrode 5. It is becoming more and more common. The charged dust is adsorbed by the filter 23 at the subsequent stage (it is at ground potential), and only the purified air flows into the intake port 11,
It is discharged to the outside of the machine via the fan casing 12, exhaust duct 13, and louver 14. In this configuration, for maintenance of the filter 23, one location is provided between the counter electrode 5 and the prefilter 6.
For maintenance purposes, a total of two opening/closing sections, one at one location, are required. It has two opening/closing parts, and
In order to obtain a safety mechanism (power off, high voltage short circuit) that is reliable in operation, has a small number of parts, and satisfies the Electrical Appliance and Material Control Law, the conditions in the table below must be met.

[Table] Other accompanying conditions include the following. If you do not remove the filter 23, the front grill 3
can't be removed. (Rules for the order of operation so that only one safety mechanism is required) If the front grill 3 is not present, the filter 23 cannot be inserted and installed. (Since the safety mechanism is activated by the filter, without this regulation, the power will turn on and the high voltage short circuit will be canceled even when the front grill is open.) Based on the above conditions, in the configuration of the present invention,
First, check the conditions that must be satisfied in the first table. Condition 1: When the filter 23 is “ON” and the front grille 3 is “ON”, it is in normal use and the filter 23 is completely inserted into the dust collector body, so the limit switch 22 is “ON”.
Then, the shorting plate 24 is turned “OFF” (the discharge wire support plate 16
(a state of being far away from one another) At this time, the discharge line 4 is in a state where it can be supplied with a high voltage, and the counter electrode 5 and the fibrous activated carbon filter can be supplied with a ground potential. (Power is supplied when the main body switch 19 is set to “ON.” See Figures 5, 7, 9, and 13.) Condition 2: When the filter 23 is “ON” and the front grill 3 is “OFF,” this state is It doesn't happen because regulations work. That is, without the front grille 3, the filter stopper projection 38 of the buckle body 33 would protrude into the filter opening/closing part 40, making it impossible to insert the filter 23. (See Figures 8 and 10) Condition 3: When the filter 23 is "OFF" and the front grill 3 is "ON", the limit switch 22 is "OFF", and the shorting plate 24 is connected to the discharge wire support plate 1.
6 and becomes “ON”. (See Figure 6) Condition 4 In this case, as above, the limit switch 2 is "OFF" and the shorting plate 24 is "ON".
As shown above, all the conditions in the table are satisfied. Further, the accompanying conditions are also determined by the buckle body 33.
be satisfied together. Effects of the invention As described above, the electrostatic precipitator of the present invention has a specially devised shape of the buckle body, so that if the first opening/closing part (filter) is not opened, the other opening/closing parts will be closed. In order to restrict the operation so that the (front grill) cannot be opened, by providing a limit switch and a short-circuit mechanism linked to the first opening/closing part, it is possible to omit providing them on all the opening/closing parts. Therefore, it not only improves the failure rate of component circuits and the ease of assembling wiring for limit switches, but also greatly helps in reducing component material costs.

[Brief explanation of drawings]

Fig. 1 is a perspective view of an embodiment of the electrostatic precipitator of the present invention, Fig. 2 is a sectional view of the same embodiment, Fig. 3 is a perspective view of the front grill seen from the inside, and Fig. 4 is a front body viewed from the inside. Figure 5 is a cross-sectional view with the filter fully inserted into the dust collector body, Figure 6 is a cross-sectional view with the filter removed from Figure 5, and Figure 7 is a cross-sectional view with the filter completely inserted into the dust collector body. Figure 8 is a cross-sectional view of the buckle body when inserted into the filter and the front grill is also attached, as seen from the filter opening/closing part side. Figure 8 is a cross-sectional view of the same part with the filter removed and the front grill removed. Figure 9 Fig. 10 is a partial perspective view of the buckle body corresponding to Fig. 7 and Fig. 8, respectively, Fig. 11 is a perspective view of the filter fitting, and Fig. 12 is a perspective view showing the state of the shorting plate part and the ground spring, etc. Figure, 1st
Figure 3 is a plan view of the limit switch section when the filter is completely inserted into the dust collector body. 1...Front body, 2...Rear body, 3...
Front grill, 4...discharge wire, 5...counter electrode, 6...prefilter, 16...discharge wire support plate, 22...limit switch, 23...filter, 24...shorting plate, 33...buckle body, 34...
Buckle spring, 35...Latching claw, 36...Locking part, 3
7... Attachment/detachment button, 38... Filter retaining protrusion, 39
... Rotation stopper projection, 40 ... Filter opening/closing part.

Claims (1)

[Scope of utility model registration request] A dust collector body is provided with a plurality of opening/closing parts such as a filter and a front grill, and a buckle body that engages the dust collector body and the front grille is provided. One end of the buckle body biased by the body projects into the opening/closing part of the filter to prevent the filter from being inserted into the main body, and
When the front grill is attached to the dust collector body, the buckle body is rotated by the front grill against the spring body, so that the dust collector body and the front grill are engaged, and the buckle body protrudes into the opening/closing part of the filter. is released to enable the filter to be inserted into the dust collector body, and the filter inserted into the dust collector body comes into contact with the buckle body to restrict the rotation of the buckle body, thereby allowing the filter to be inserted into the dust collector body and the buckle body. An electrostatic precipitator configured to be held in a position that maintains engagement with the front grille.