JPH0646147B2 - Smoke and deodorizer for dental electric furnace - Google Patents

Description

Detailed Description of the Invention

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a smoke eliminating and deodorizing device for a dental electric furnace that smokes and deodorizes exhaust gas such as wax burned in a dental electric furnace using a catalyst. It is characterized in that the exhaust gas is prevented from being discharged to the outside without being oxidized by the catalyst, though the replacement of the exhaust gas can be done very easily and the trouble of repair can be saved.

[Prior art]

Conventionally, a smoke eliminating and deodorizing apparatus for a dental electric furnace, which smokes and deodorizes exhaust gas such as wax burned in a dental electric furnace using a catalyst, can be roughly classified into the following two structures. 1) A structure in which a heater and a catalyst are sequentially grounded on the exhaust hole of a dental electric furnace, and smoke and deodorization are performed while naturally exhausting upwards by utilizing the lightness of high-temperature exhaust gas, 2) a heater and a catalyst And the exhaust fan are arranged side by side in the horizontal direction, and the exhaust fan provided behind the catalyst forcibly exhausts the exhaust gas discharged from the exhaust hole of the dental electric furnace in the order of the heater part and the catalyst to eliminate the exhaust gas. Structure that deodorizes smoke. Since the smoke eliminating and deodorizing device for a dental electric furnace having the above-mentioned second basic structure is a horizontal type in which a heater, a catalyst, and an exhaust fan are arranged side by side in the horizontal direction, installation is difficult if the height is high. It has been widely used in recent years because it has an advantage that it can be installed without obstacle even when there are restrictions such as a difficult dental laboratory.

[Problems to be Solved by the Invention]

Exhaust gas such as wax burned in the dental electric furnace contains a large amount of water vapor, hydrocarbons, ammonia, carbon, etc., and the exhaust gas is heated and oxidized when passing through the heater part where the heater is installed. Although the harmful substances etc. are considerably reduced but they are not yet complete, it is the smoke eliminating deodorizer of the dental electric furnace that is used for the purpose of completely removing the harmful substances etc. by the catalyst. Since the catalyst is also deteriorated by harmful substances and the like, it must be frequently replaced. In the smoke eliminating and deodorizing device of the dental electric furnace having the basic structure as shown in the second above, the heater and the catalyst are heat insulating materials and the like. Although the exhaust gas passes through it because it is covered with, the heat insulating material is processed with low precision and the heat insulating material is integrally processed by a handmade manufacturing method to prevent leakage of the exhaust gas. Therefore, when replacing the catalyst, the heater must be removed together, and it takes time to remove the catalyst, fill in the gap between the catalyst and the heat insulating material, and fix the catalyst, which is troublesome for the operator. I got it.

[Means for solving problems]

The present inventor repeated trial and error with respect to the smoke eliminating and deodorizing apparatus for a dental electric furnace having the basic structure as shown in the above-mentioned No. 2 surface in order to solve the above problems, and as a result, the heat insulating material covering the heater and the catalyst. The heat insulating material that covers is divided into a structure that does not need to remove the heater together when replacing the catalyst.
The present invention has been completed by researching the structure of a smoke eliminating and deodorizing device for a dental electric furnace in which there is no fear of exhaust gas leakage even if there is a slight gap between the catalyst and the heat insulating material. That is, in the present invention, a heater, a catalyst, and an exhaust fan are sequentially arranged side by side on a base, and the exhaust gas provided at the rear of the catalyst forces exhaust gas exhausted from an exhaust hole of a dental electric furnace. In a device that removes smoke and deodorizes by sequentially sucking and passing through the heater part where the heater is installed and the catalyst in order, the heat insulating material for the heater that covers the heater and the heat insulating material for the catalyst that covers the catalyst are separated. The heater heat insulating material is fixed to the base by the heater heat insulating material fixing metal fitting, the catalyst heat insulating material is fixed to the base by the catalyst heat insulating material fixing metal fitting, and the catalyst heat insulating material heater A smoke deodorizing device for a dental electric furnace, characterized in that the protruding portion of the catalyst protruding toward the heater rather than the side edge is fitted into the end of the heat insulating material for the heater. A.

【Example】

Hereinafter, the smoke eliminating and deodorizing apparatus for a dental electric furnace according to the present invention will be described in detail based on the embodiments shown in the drawings. FIG. 1 is a structural explanatory view of a smoke eliminating and deodorizing device for a dental electric furnace according to the present invention, in which 1 is a base made of a heat insulating material or the like installed on an exhaust hole of a dental electric furnace (not shown). As shown in the drawing, a flow path 1a for guiding exhaust gas is provided inside. Reference numeral 2 is a heater for heating exhaust gas discharged from a dental electric furnace to completely convert steam, hydrocarbons, ammonia, carbon (gas and soot) contained in the exhaust gas into active gas. It is covered and supported by the heater heat insulating material 2a fixed to the base 1 by the heater heat insulating material fixing fitting 2b. 3 is a catalyst that oxidizes exhaust gas that has been heated and activated by the heater 2 to remove smoke and deodorize it. This catalyst 3 is a catalyst heat insulating material 3a fixed to the base 1 by a catalyst heat insulating material fixing metal fitting 3b. Heater 2 of the catalyst heat insulating material 3a which is covered and supported by
The protruding portion 3'of the catalyst 3 protruding toward the heater 2 side from the side edge 3a 'is inserted into the end portion of the heater heat insulating material 2a, and as shown in the figure, the catalyst heat insulating material fixing bracket. If 3b also covers the end of the heater heat insulating material 2a on the catalyst 3 side, even if there is a slight gap between the catalyst heat insulating material 3a and the heater heat insulating material 2a, almost no exhaust gas will leak. It is preferable because it can be completely prevented, and a heat insulating material fixing metal fitting for catalysts
In order that 3b can press the catalyst heat insulating material 3a simultaneously to the heater heat insulating material 2a and the base 1 direction, on the side surface of the heater heat insulating material fixing metal fitting 2b in a direction of 45 ° with respect to the catalyst heat insulating material fixing metal fitting 3b. A metal fitting 2b 'for the heater is provided toward the heat insulating material fixing metal fitting 2b for the heater at a position facing the metal fitting 2b' for the catalyst on the side surface of the catalyst heat insulating material fixing metal fitting 3b.
If the locking metal fitting 3b 'is provided in the 5 ° direction,
By screwing the screw 9 inserted through the locking metal fitting 3b ′ to the locking metal fitting 2b ′, one screw is connected to the catalyst heat insulating material fixing metal fitting 3b to the heater heat insulating material fixing metal fitting 2b. And fixing to the base 1 and the heater 2 side edge 3a 'of the catalyst heat insulating material 3a
More preferably, the protruding portion 3 ′ of the catalyst 3 protruding toward the heater 2 side can be simultaneously inserted into the end portion of the heater heat insulating material 2 a to reduce the number of times of screwing. Numeral 4 is provided behind the catalyst 3 and driven by an exhaust fan motor described later via a rotary shaft described later to forcibly suck in the exhaust gas discharged from the exhaust hole of the dental electric furnace and Exhaust fan for passing exhaust gas in order of the heater part and the catalyst 3 provided, 5
Is an exhaust fan motor for driving the exhaust fan 4 via the rotary shaft 5a, and 6 is a mica material provided between the exhaust fan motor 5 and the exhaust fan 4 so that only the rotary shaft 5a is penetrated. It is a heat insulating shield. 7 is a rotary shaft 5a located on the exhaust fan motor 5 side of the heat insulating shield plate 6
Is a cooling fan provided to cool the exhaust fan motor 5, and the exhaust fan motor 5 is mounted on the rotary shaft 5a located between the heat insulating shield plate 6 and the exhaust fan motor 5 as shown in the figure. When installed,
It may be attached to the rotary shaft 5a located on the side opposite to the heat insulating shield plate 6 of the exhaust fan motor 5 as shown by the one-dot chain line in the drawing, and the flow direction of the cooling air sucked in this case is shown in the figure. The direction opposite to the direction is more preferable because the air that has passed through the catalyst 3 is not sucked. 8a and 8b are cases in which the heater 2 side and the exhaust fan motor 5 side are separated from each other with the location provided on the heat insulating shield plate 6 as a boundary, and are separately fixed to the base 1. . Reference numeral 9 denotes a screw, which includes the locking metal fitting 3b 'provided on the side surface of the catalyst heat insulating material fixing metal fitting 3b and the locking metal fitting 2b' provided on the side surface of the heater heat insulating material fixing metal fitting 2b. By fixing the heat insulating material fixing metal fitting 3b for the catalyst to the heat insulating material fixing metal fitting 2b for the heater and the base 1.

[Action]

In the smoke eliminating and deodorizing apparatus for a dental electric furnace according to the present invention having the above structure, the heater heat insulating material 2a covering the heater 2 and the catalyst heat insulating material 3a covering the catalyst 3 are separate bodies. Since the catalyst 3 is only covered with the catalyst heat insulating material 3a, the catalyst 3 can be replaced very easily, and the heater 2 side edge 3a 'of the catalyst heat insulating material 3a is also provided.
Since the protruding portion 3'of the catalyst 3 which is projected to the heater 2 side is inserted into the end of the heater heat insulating material 2a, the heater heat insulating material 2a and the catalyst heat insulating material 3a are provided between the heater heat insulating material 2a and the catalyst heat insulating material 3a. Even if there is a slight gap, the exhaust gas passing through the gap comes into contact with the catalyst 3 and then flows out, so that smoke or odor does not leak to the outside.

【effect】

As described above, the smoke eliminating and deodorizing apparatus for a dental electric furnace according to the present invention is very easy to replace the catalyst while maintaining the smoke eliminating and deodorizing performance of the conventional smoke eliminating and deodorizing apparatus for a dental electric furnace. It is easy to do, and it saves the trouble of repairing, so it is of great value in the dental industry.

[Brief description of drawings]

The drawings are structural explanatory views of the smoke eliminating and deodorizing device for a dental electric furnace according to the present invention. 1 ... Base, 1a ... Flow path 2 ... Heater 2a ... Heater insulation 2b ... Heater insulation fixing fitting 2b '... Stop fitting 3 ... Catalyst 3' ... Heater side Protruding part 3a …… Catalyst heat insulating material 3a ′ …… Heat end edge of catalyst heat insulating material 3b …… Catalyst heat insulating material fixing metal fitting 3b ′ …… Stopping metal fitting 4 …… Exhaust fan 5 …… Exhaust fan Motor 5a …… Rotating shaft 6 …… Adiabatic shield plate 7 …… Cooling fan 8a, 8b …… Case 9 …… Screw

Claims (3)

[Claims] 1. A heater (2), a catalyst (3), and an exhaust fan (4) are sequentially arranged side by side on a base (1), and an exhaust fan () is provided behind the catalyst (3). 4) The heater part where the heater (2) is provided by forcibly sucking the exhaust gas discharged from the exhaust hole of the dental electric furnace by
In the device for passing the exhaust gas through the catalyst (3) in this order to eliminate smoke and deodorize, a heater heat insulating material (2
a) and the catalyst heat insulating material (3a) covering the catalyst (3) are divided, and the heater heat insulating material (2a) is fixed to the base (1) by the heater heat insulating material fixing bracket (2b). The catalyst heat insulating material (3a) is fixed to the base (1) by the catalyst heat insulating material fixing metal fitting (3b), and the heater (2) side edge of the catalyst heat insulating material (3a) ( Dental, characterized in that the protruding portion (3 ') of the catalyst (3) protruding toward the heater (2) side with respect to 3a') is inserted into the end portion of the heater heat insulating material (2a). Smoke deodorizer for electric furnace. 2. Dental electricity according to claim 1, wherein the catalyst heat insulating material fixing bracket (3b) is a catalyst heat insulating material fixing metal fitting covering a part of the heater heat insulating material (2a). Smoke removing device for furnace. 3. The catalyst heat insulating material fixing bracket (3b) is a catalyst heat insulating material.
The metal fitting (2b ') for fixing the heater heat insulating material (2a) and the base (1) at the same time as the heat insulating material (2a) for the heater and the base (1) are oriented at 45 ° to the heat insulating material fixing metal fitting (2b). ) And (3
The smoke eliminating and deodorizing device for a dental electric furnace according to claim 1 or 2, which is a heat insulating material fixing metal fitting for a catalyst, which is connected to b ') by a screw (9).