JPS6036820Y2 - Air supply/exhaust type central ventilation system - Google Patents

Description

[Detailed description of the invention] This invention relates to a supply/exhaust type central ventilation system that exhausts contaminated air from indoors and at the same time sucks in clean air from outside.

Figures 3 and 4 show conventional examples of supply/exhaust type ventilation equipment used in this type of supply/exhaust type central ventilation equipment, and in the figures,
Reference numeral 1 denotes a casing that houses an exhaust blower and a supply air blower (both not shown), which is buried in the ceiling and forms an indoor suction port 2 and an air outlet 3 on the lower surface of the ceiling. , an exhaust port 4 and an air supply port 5 are formed in the ceiling.

Note that a heat exchanger (not shown) is housed in the casing 1 for exchanging heat between the exhaust flow from the room (indicated by arrow A) and the air supply flow from the outdoors (indicated by arrow B). .

A conventional supply/exhaust type ventilation system is composed of components 1 to 5, an exhaust blower, a supply air blower, and a heat exchanger.

Reference numeral 6 denotes an exhaust duct connected to the exhaust port 4 and guiding exhaust gas outdoors.

In addition, an air supply duct (
(not shown) is connected to the air supply port 5.

The above-mentioned supply/exhaust type ventilation system is installed on the ceiling surfaces of multiple rooms having different purposes and uses.

In this case, the exhaust duct 6 is connected to a common exhaust concentration duct (not shown) to form a common exhaust duct, and the above-mentioned air supply duct is connected to a common supply air concentration duct (not shown) to form a common exhaust duct. Configure the air supply duct.

A conventional supply/exhaust type central ventilation system to which a supply/exhaust type ventilation system is applied is constructed as described above.

Next, the operation will be explained.

Indoor air is sucked in from the indoor suction port 2 by an exhaust blower, passes through the heat exchanger inside the casing 1, and is sent to the ceiling exhaust port 4.
and is discharged outdoors through the above-mentioned common exhaust duct including the exhaust duct 6.

At the same time, outdoor air is drawn in by the air supply blower from the above-mentioned common air supply duct through the in-ceiling air supply port 5,
Furthermore, it passes through the heat exchanger inside the casing 1 and is supplied indoors from the indoor air outlet 3.

During heating in the winter, heating efficiency decreases due to ventilation, but by warming the incoming low-temperature outdoor air with the high-temperature indoor air that flows out, this decrease in heating efficiency is prevented, and conversely, during cooling in the summer, the low-temperature indoor air that flows out is reduced. This prevents a drop in cooling efficiency by cooling the incoming high-temperature outdoor air.

By the way, if the supply/exhaust type ventilation system is not used in only one room among multiple rooms each equipped with supply/exhaust type ventilation systems, other supply/exhaust type ventilation systems may be operated. There is a problem in that the exhaust air from the room flows through the above-mentioned common exhaust duct from the exhaust port 4 of the inactive air supply/exhaust type ventilation system to the inactive room through the inlet port 2.

This idea was made to improve the above-mentioned problems, and the air supply and exhaust ventilation system that is in operation is not able to exhaust air from the room from the exhaust port of the supply and exhaust ventilation system that is not in use to other rooms. The purpose of the present invention is to provide a supply/exhaust type central ventilation system that prevents air from flowing into a room.

An embodiment of this invention will be described below with reference to FIGS. 1 and 2.

FIG. 1 schematically shows a supply/exhaust type central ventilation system according to this invention, and FIG. 2 shows a cross section of the exhaust port portion of the supply/exhaust type ventilation system used in the supply/exhaust type central ventilation system of FIG. 1.

In FIGS. 1 and 2, the same reference numerals as in FIGS. 3 and 4 indicate the same or corresponding parts. This configuration is different from that of the conventional example shown in the figure.

4a is attached to the exhaust port 4 in the ceiling so that it can be opened and closed freely, and is indicated by arrow A.
4b is a backflow prevention shutter that is opened only by the wind pressure of the exhaust air in the outdoor direction.
4C is a stopper provided on the exhaust port 4 so as to stop the shutter 4a at the position where the shutter 4a closes the exhaust port 4 when the shutter 4a receives wind pressure in the opposite direction indoors.
This is a fulcrum shaft that rotatably supports a.

7 is an air supply duct connected to the air supply port 5, 8 is a room 9.1
A supply/exhaust type ventilation system 20 having the above configuration is attached to the ceiling surface of each of the plurality of rooms 9, 10, and 11 on the wall that partitions the room 0.11.

12 is a common exhaust gas concentration duct connected to the exhaust duct 6, and 13 is a common air supply concentration duct connected to the air supply duct 7.

The exhaust duct 6 and the concentrated exhaust duct 12 constitute a common exhaust duct 21, and the air supply duct 7 and the concentrated air supply duct 13
A common air supply duct 22 is configured.

As described above, the supply/exhaust type central ventilation system according to this invention was constructed.

Next, a case will be described in which the supply/exhaust type ventilation system 20 is not used in only one of the plurality of rooms 9, 10, 11, for example, room 10.

Supply/exhaust ventilation system 20 in operation in other rooms 9 and 11
The exhaust gas passes through the exhaust concentration duct 12 and the exhaust duct 6 attached to the supply/exhaust type ventilation system 20 of the room 10, and applies wind pressure to the shutter 4a in the direction opposite to the arrow A shown in the figure.

However, the shutter 4 of the supply/exhaust ventilation system 20 in the room 10
A is stopped by a stopper 4b in the closed position where the exhaust port 4 is closed, and does not open in the opposite direction to the opening direction during exhaustion.

Therefore, the exhaust gas is blocked by the shutter 4a, so that it does not flow into the room 10 through the exhaust port 4 of the air supply/exhaust type ventilation system 20 in the room 10.

As explained above, according to this invention, the exhaust ports of a plurality of supply/exhaust type ventilation devices are connected by a common exhaust duct, and the shutter that opens due to wind pressure and the stopper that abuts the shutter in the closed position of the shutter are connected to exhaust the air. The structure provided at the opening prevents the exhaust air from the room where the supply/exhaust ventilation system is being operated from flowing into the room where the supply/exhaust ventilation system is not in use and contaminates the air in that room. This has the effect of keeping the air clean.

[Brief explanation of the drawing]

Fig. 1 is a simplified diagram showing one embodiment of this invention, Fig. 2 is a vertical sectional view showing the exhaust port portion of the supply/exhaust type ventilation system used in this invention, and Fig. 3 is a perspective view of the supply/exhaust type ventilation system. , FIG. 4 is a vertical sectional view showing a conventional exhaust port portion. In the figure, 1 is a casing, 4 is an exhaust port, 4a is a shutter, 4b is a stopper, 4C is a support shaft, 6 is an exhaust duct,
9, 10, 11 are rooms, 12 is a central exhaust duct, 20 is a supply/exhaust type ventilation system, and 21 is a common exhaust duct. Note that the same reference numerals in the figures indicate the same or corresponding parts.

Claims (1)

[Scope of Claim for Utility Model Registration] (11) A casing that is provided with an exhaust port for discharging indoor air and is also provided with a supply air blower and an exhaust air blower inside, and a shutter that is provided at the exhaust port and opens by wind pressure. A supply/exhaust type ventilation device is provided in each of the plurality of rooms, and each room is provided with a supply/exhaust type ventilation device that sucks in outdoor air using the air supply blower and exhausts indoor air from the exhaust port using the exhaust blower, and A supply/exhaust type central ventilation system connected by an exhaust duct, characterized in that the exhaust port is provided with a stopper that comes into contact with the shutter when it is in a closed position. (2) The casing 2. A supply/exhaust type central ventilation system according to claim 1, characterized in that a heat exchanger for exchanging heat between an exhaust flow from indoors and a supply air flow from outside is provided inside the ventilation system.