JPH0673634U - Air supply / exhaust device - Google Patents

Abstract

(57) [Summary] [Purpose] The construction is simple, there is no discomfort due to indoor air drafts, and there is no need for duct insulation work. [Composition] Exhaust fan 11 is opened to the inside of the room
Of the exhaust hood 10 attached to the exhaust hood 10, an exhaust duct 12 connected to the exhaust hood 12 and led to the outside, an air supply hood 20 provided so as to surround an outer surface of the exhaust hood 10, and an exhaust duct 12 connected to the exhaust hood 10. The air supply duct 21 is formed so as to surround the outer side surface, and the air supply passage 2 is formed adjacent to the outside of the exhaust passage 1.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an air supply / exhaust hood for ventilating a room.

[0002]

[Prior art]

 As an indoor ventilation system for buildings, especially in the kitchen, an exhaust hood located above the kitchen equipment is installed, and the combustion gas and water vapor from the kitchen equipment is exhausted from the exhaust hood to the outside air through the exhaust duct. It is like this. Further, in order to introduce the outside air corresponding to the exhaust amount, it is necessary to provide the air supply port and the air supply flow path separately from the exhaust hood. A filter is installed at the air intake port at the outer end of the air supply passage, and the filter removes dust from the introduced outside air.

[0003]

[Problems to be solved by the device]

 The above conventional kitchen ventilation equipment has the following problems. (1) In addition to the exhaust hood and exhaust duct, it is necessary to provide an air supply port and air supply flow path, and it is often necessary to make struggles with the fitting of the exhaust hood and air supply port on the ceiling surface during construction. . (2) Depending on the position of the air supply port, the outside air supplied to the kitchen may cause drafts in the indoor air, which may cause discomfort to the human body. (3) The exhaust duct is heated by high-temperature exhaust containing combustion gas, high-temperature steam, etc.Therefore, as a disaster prevention measure, this exhaust duct must be insulated and fire-proofed with rock wool, etc. I won't. (4) Since the air supply filter is installed at the air intake opening on the outdoor side, it takes time to maintain it.

The present invention has been made under the circumstances as described above, and its main purpose is that the construction is simple, no discomfort is caused by the draft of the indoor air, and the exhaust duct. There is no need for heat insulation work.

[0005]

[Means for Solving the Problems]

 The above technical problems can be effectively solved by the present invention. That is, the air supply / exhaust device according to the present invention has an exhaust hood that is opened toward the inside of the room and has an exhaust fan mounted inside, an exhaust duct that is connected to the exhaust hood and is led out to the outside, and an outer surface of the exhaust hood. And an air supply duct connected to the air supply hood so as to surround the outer surface of the exhaust duct. Further, preferably, an air supply filter is detachably provided between the exhaust hood and the air supply hood.

[0006]

[Action]

 In the air supply / exhaust device, when the exhaust fan is operated, the air in the room is discharged from the exhaust hood into the outside air through the exhaust duct. At the same time, the negative pressure in the room is accompanied by the exhaust air, so outside air is introduced from the outside through the air supply flow path between the exhaust duct and its outside air supply duct and between the exhaust hood and its outside air supply hood. At this time, this outside air is filtered by the air supply filter. If the exhaust air that passes through the exhaust duct is hot air that contains high-temperature combustion gas generated in the kitchen equipment, the outside air that flows through the air supply flow path outside it will act as a cooling layer, and the heat generated by the exhaust gas will cause an overheat condition. It can't be.

[0007]

【Example】

 1 and 2 show an embodiment of the air supply / exhaust device of the present invention attached to a kitchen. Reference numeral 10 is an exhaust hood, and 11 is installed in a base end portion 10a of the exhaust hood 10. The exhaust fan 12 is an exhaust duct that is connected to the base end portion 10a and extends toward the outside. Reference numeral 20 is an air supply hood provided so as to surround the outer side surface of the exhaust hood 10. Reference numeral 21 is connected to a base end 20a of the air supply hood 20 located outside the base end 10a of the exhaust hood 10. And an air supply duct provided so as to surround the outer surface of the exhaust duct 12. The exhaust hood 10 and the air supply hood 20 are integrally connected to each other through a connecting fitting (not shown), and an opening end of the ceiling 31 is opened above the kitchen equipment (not shown). It is supported by a bracket 22 fixed to the side wall of the air supply hood 20 and a hanging bolt 32 screwed to the bracket 22 while being fitted toward the side. Further, the exhaust duct 12 and the air supply duct 21 are also integrated, and are supported by a suspension bolt or the like (not shown).

On the front side (lower side) of the exhaust fan 11 at the base end portion 10a of the exhaust hood 10, a grease filter 13 is detachably attached with its center protruding downward, and further below it. A funnel-shaped oil pan 14 is detachably fixed via a metal fitting (not shown). An oil receiving groove 15 protruding inward is formed on the entire circumference of the lower end opening edge of the exhaust hood 10. An oil recovery container 16 is detachably attached to a part of the oil receiving groove 15. The oil pipe 14 a extended from the oil pan 14 is introduced into the oil recovery container 16.

An air supply filter 23 is inserted between the side wall of the exhaust hood 10 and the side wall of the air supply hood 20 outside the exhaust hood 10, and is supported on a protrusion 24 protruding inside the air supply hood 20. Has been done. Further, on the side wall of the air supply hood 20, a filter inspection port 26 that can be opened and closed by a lid 25 is provided at a position corresponding to the storage portion of the air supply filter 23.

In the air supply / exhaust device of this embodiment, when the exhaust fan 11 is operated, hot air containing combustion gas, high-temperature steam, etc. generated in the kitchen equipment is exhausted from the inside of the exhaust hood 10 by the exhaust fan 11 to the exhaust duct 12. It is discharged to the outside through the exhaust flow path 1 inside. At this time, the oils and fats contained in the exhaust gas are separated by the grease filter 13, and the oils and fats accumulated in the grease filter 13 flow down to the oil pan 14 and are collected in the oil recovery container 16 via the oil pipe 14a. To be done. Further, oils and fats attached to the inner wall surface of the exhaust hood 10 and flowing down on the wall surface are collected in the oil receiving groove 15. At the same time when the exhaust fan 11 is operated to perform exhaust, negative pressure is generated in the room, so that outside air having a flow rate corresponding to the exhaust amount is discharged from the outside to the exhaust duct 12 and the air supply duct 21 outside thereof. After passing through the space 2 and between the exhaust hood 10 and the air supply hood 20 on the outside thereof, the air is removed by the air supply filter 23 before being supplied indoors.

Exhaust gas sent to the exhaust flow path 1 in the exhaust duct 10 has a high temperature, but the outside air passing through the air supply flow path 2 outside the exhaust duct 10 has a low temperature. The wall surface of the air duct 21 does not become hot. Therefore, it is not necessary to perform heat insulation and fire protection with rock wool or the like on the outside of the duct as in the conventional case. The outside air from the outside is supplied to the room through the opening 2a between the lower end edge of the exhaust hood 10 and the lower end edge of the air supply hood 20 outside the exhaust hood 10, that is, adjacent to the exhaust position inside the exhaust hood 10. Since it is supplied from the position, the draft due to the supply of outside air is unlikely to occur in the room, and therefore does not give any discomfort to the person in the kitchen. When the air supply filter 23 is in a certain contaminated state due to the dust removed from the outside air, the filter inspection port 26 on the side wall of the air supply hood 20 is opened to remove the air supply filter 23. It can be washed with water in the kitchen.

[0012]

[Effect of device]

 According to the air supply / exhaust device of the present invention, the following effects are realized. (1) Since the exhaust hood and the air supply hood and the exhaust duct and the air supply duct are integrated, there is no need to match the air supply position and the exhaust position on the ceiling surface, and the construction is simple. (2) Since the air supply / exhaust positions are close to each other, draft is unlikely to occur in the room air, and discomfort to the human body can be eliminated. (3) Around the exhaust duct through which the high-temperature combustion gas passes, a low-temperature air supply channel is formed, and this air-supply channel serves as a cooling layer. No need to give. (4) Maintenance of the air supply filter is easy.

[Brief description of drawings]

FIG. 1 is a schematic sectional view showing an embodiment of an air supply / exhaust device of the present invention attached to a ceiling 30 of a kitchen.

FIG. 2 is a side view as seen from the direction of arrow A in FIG.

[Explanation of symbols]

 1 Exhaust Flow Path 2 Air Supply Flow Path 10 Exhaust Hood 11 Exhaust Fan 12 Exhaust Duct 20 Air Supply Hood 21 Air Supply Duct 23 Air Supply Filter

Claims (2)

[Scope of utility model registration request] 1. An exhaust hood which is open to the inside of the room and has an exhaust fan mounted inside, an exhaust duct which is connected to the exhaust hood and is led out to the outside, and is provided so as to surround an outer surface of the exhaust hood. An air supply / exhaust device comprising: an air supply hood; and an air supply duct connected to the air supply hood and formed so as to surround an outer surface of the exhaust duct. 2. The air supply / exhaust device according to claim 1, wherein an air supply filter is detachably provided between the exhaust hood and the air supply hood.