JPH0367944A - Ventilating fan - Google Patents

Abstract

PURPOSE:To change ventilation from the quick one to the gentle one and adjust a dehumidifying capacity by providing a casing for accommodating an absorber composed of an absorbent and a heater, a separator for separating intake air and ventilating air from each other and a blower with an air intake for bypassing the intake air and/or ventilating air. CONSTITUTION:After mixed with indoor air taken in from an intake air bypass 7, outdoor air taken in from an inlet 12 in an air intake mode flows into an absorber 3 wherein steam and harmful components are removed. That is, outdoor and indoor air can be supplied into a room at the same time as clean air while being dehumidified. Moreover, a dehumidifying amount can be controlled by adjusting the opening area of the intake air bypass 7. In a ventilation mode, after ventilating air enters the absorber 3 from an inlet opening 9 and is dehumidified, the ventilating air is mixed with the indoor air flowing in from a ventilation bypass 6 and discharged outdoor from an exhaust opening 13. At this time also, the amount of dehumidification and ventilation can be controlled by changing the opening area of the ventilation bypass 6.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a technique for maintaining good indoor air quality by using adsorbents, dehumidifying membranes, etc. and by utilizing bypass air.

Conventional technology Conventionally, this type of ventilation fan has a configuration shown in FIG.

A return air blower 1 and a supply air blower 2 are provided, and supply air and return air to the total heat exchanger 3. After the indoor air passes through the total heat exchanger 3, the ring air is directly released outdoors. As for air supply, outdoor air is supplied indoors through the total heat exchanger 3.

Problems to be Solved by the Invention In the conventional technology, when it is desired to rapidly ventilate indoor air,
The pressure loss of the total heat exchanger becomes the rate-limiting condition, making it impossible to provide sufficient rapid ventilation. To achieve this, it is necessary to increase the air blowing capacity or reduce the pressure drop of the total heat exchanger. However, these measures have the problem of unavoidably increasing noise and increasing the size of the equipment.

Means for Solving the Problems In order to solve the above problems, the ventilation fan of the present invention focuses on the use of bypass air and an adsorbent. Specifically, it includes a blowing section for supply air and return air, an adsorption section through which supply air and return air pass and is made up of an adsorbent and a heater, and a separation section that separates supply air and return air. It consists of a casing part that houses each of the above parts, and the casing part is provided with an air intake part for bypassing supply air, return air, or both.

Operation The ventilation fan of the present invention operates as follows due to the above configuration.

In the case of recycled air, part of the indoor air passes through the adsorption unit,
Some of the air enters the blower directly through the bypass air intake. Indoor air mixed within the blower is released outdoors. In other words, the amount of indoor air ventilation can be adjusted depending on the size of the bypass section.

In the case of air supply, the outdoor air and a portion of the indoor air that has passed through the bypass section are mixed in the blower, then passed through the adsorption section and supplied indoors. As a result, contaminants in indoor air can be directly purified, and the amount of ventilation from outside can be controlled.

Embodiment Hereinafter, one embodiment of the present invention will be described based on the accompanying drawings. In FIG. 1, 1 is a return air blower, and 2 is a supply air blower. 3 is the adsorption part, and honeycomb-shaped adsorbent 1
0 and the heater 11 embedded in the same adsorbent. The return air and the supply air are separated by a separation section 4. Reference numeral 5 denotes a casing section which houses the above-mentioned components and has a return air bypass section 6 immediately above the return air blower 1 and a supply air bypass section 7 immediately below the supply air blower 2. 8 is a supply air outlet, and 9 is a return air intake port. 12 is an air supply port provided outdoors, and 13 is an exhaust port.

Next, the operation of the configuration of this embodiment will be explained.

(Air supply mode); Outdoor air taken in from the air supply port 12 is mixed with indoor air taken in from the air supply bypass section 7 in the air supply blower 2, and then flows into the adsorption section 3. Water vapor and harmful components are removed from this mixed air in the adsorption section 3. That is, the ventilation fan of this embodiment can simultaneously dehumidify outdoor and indoor air and supply clean air into the room. Moreover, the air supply bypass section 7
The amount of dehumidification can be controlled by adjusting the opening area.

(Recirculation mode): Recirculation air is supplied from the suction port 9 to the suction unit 3.
After being dehumidified, it mixes with indoor air that has flowed in from the return air bypass section 6, and is discharged outdoors from the exhaust port 13. Even in this mode, dehumidification and ventilation amount can be controlled by varying the opening area of the return air bypass section 6.

As described above, by adjusting the opening areas of the air supply and return air bypass sections, rapid ventilation is possible without changing the size of the device body and the blower.

Effects of the Invention As described above, the present invention provides the following effects by incorporating indoor air intake means while using an adsorbent.

(1) By adjusting the opening area of the indoor air intake, the amount of ventilation can be controlled over a wide range. Therefore, rapid ventilation can be changed to gentle and quiet ventilation.

(2) Since indoor and outdoor air can be mixed, dehumidification capacity can be adjusted.

[Brief explanation of drawings]

FIG. 1 is a longitudinal sectional view of a ventilation fan showing an embodiment of the present invention, and FIG. 2 is a longitudinal sectional view of a conventional ventilation fan. 1... Air supply blower, 2... Ventilation blower, 3... Adsorption section, 4... Separation section, 5
...Casing part, 7...Air supply bypass part, 8...Return air bypass part, IO...
...Adsorbent, 11...Heater.

Claims (1)

[Claims] an air blowing section for supply air and return air; an adsorption section through which the supply air and return air pass and are composed of an adsorbent and a heater; a separation section that separates the supply air and return air; A ventilation fan comprising a casing part that houses an adsorption part and the separation part, and the casing part is provided with an air intake part for bypassing supply air, return air, or both.