JPS59170634A - Air conditioning ventilating fan - Google Patents

Abstract

PURPOSE:To improve the humidity adjusting efficiency of the titled fan by a method wherein in the case of the air conditioning ventilating fan capable of adjusting humidity, a heat exchange section and a moisture permeable section are provided in a heat excharger and a bypass passage capable of controlling the flow rate of the open air on the base of the humidity in a room is provided in the moisture permeable section in parallel relationship with an open air passage. CONSTITUTION:The indoor air 8 and the open airs 6 and 12 are exchanged by blowers 15 and 16. In this case, the open air 12 exchanges sensible heat and then latent heat with the indoor air 8 flowing through an indoor air passage 7 through a heat exchange element 4 and through a moisture permeable heat exchange element 5 and is introduced into the room from a blowout port 13. At the same time, the open air 6 is introduced into the room directly from an opening 14 through the bypass passage 18. Further, the opening degree of motor valve 19 in the bypass passage 18 is controlled by the humidity in the room so that the quantity of the open air passing through the bypass passage 18 is controlled. As a consequence, it is possible to improve the accuracy of adjustment of the humidity in the room.

Description

[Detailed description of the invention] The present invention is applied to an air conditioning ventilation fan that can adjust indoor humidity.

As is well known, air conditioning ventilation fans are used to collect pollutants in indoor air, such as Co2. This is an energy-saving type that removes Co, dust, etc., and at the same time exchanges heat with the indoor air that is discharged outside from the outdoor air that is drawn into the room, thereby suppressing significant fluctuations in indoor air temperature.

The heat exchange type of the above-mentioned air conditioning ventilation fan is mainly classified into two types: one type is a type that simply exchanges heat between indoor air and outdoor air, and the other type is a type that exchanges humidity at the same time as heat exchange. be.

However, in the former case, no humidity exchange is performed at all, and in the latter case, only a certain percentage of humidity exchange is performed, and the amount of humidity exchange cannot be adjusted. It is hard to say that it is a ventilation fan.

The present invention has been made in view of the above points, and includes a heat exchanger for an air conditioning ventilation fan that exchanges heat between indoor air discharged to the outside and outdoor air taken into the room. It is formed by a moisture permeable part for humidity exchange connected in series to the heat exchange part, and an outdoor air bypass passage is formed in parallel with the outdoor air passage of the moisture permeable part and is turbidically insulated from the indoor air passage. In addition, by providing the bypass passage with a means for adjusting the area of the passage according to the indoor humidity, the above-mentioned conventional disadvantages are solved.

In other words, when the indoor humidity is low, the passage area of the bypass passage is reduced, and the amount of off-campus air passing through the moisture permeable section is increased to increase the amount of air absorbed, while when the indoor humidity is high, the passage area of the bypass passage is reduced. The amount of moisture absorbed is reduced by increasing the amount of outdoor air passing through the moisture permeable part. As a result, the humidity of the outdoor air heat-exchanged with the indoor air in the heat exchange section can be adjusted according to the indoor humidity, so that a more comfortable indoor environment can be obtained than in the past.

An embodiment of the present invention will be described below based on the drawings.

In the figure, an air conditioning ventilation fan 2 is attached to a wall 1 that separates an indoor room from an outdoor room. Inside the main body case 3 of this empty leg ventilation fan 2, there is a non-permeable heat exchanger 4 made of plastic or metal on the outdoor side, and a moisture-permeable heat exchanger 4 made of treated paper on the indoor side. At the same time, humidity is exchanged and latent heat is A heat exchanger 5, which also performs heat exchange, is provided, and these are connected in series at a joint 6.

The heat exchangers 4 and 5 have respective passages separated from each other so that the indoor air and outdoor air do not mix, and the indoor air passage 7 has an indoor air inlet 8 formed on the side of the main body case 3 on the indoor side. ,
The indoor air outlet 9 is the opening 1 on the outdoor end surface of the main body case 30.
On the other hand, the outdoor air passage 11 is configured such that an outdoor air inlet 12 is opened on the side of the main body case 3 on the outdoor side, and an outdoor air outlet 13 faces an opening 14 on the indoor side end surface of the main body case 3. There is.

A blower 1 for discharging indoor air is provided between the outdoor end opening 10 of the main body case 30 of the air conditioning ventilation fan 2 and the indoor air outlet 9 and between the indoor end opening 14 and the outdoor air outlet 13.
5 and a blower 16 for intake of outdoor air are provided, and each blower 15,16 is used to collect CO2. The operation is controlled by the control circuit 1T in a timely manner depending on the concentration of pollutants such as CO and dust.

On the other hand, between the outdoor air passage section upstream of the blower 16 and the outdoor air passage section of the joint section 6, there is an outdoor air passage 11 between the outdoor air passage section
In parallel with the indoor air passage I in the heat exchanger 5 where humidity exchange is performed, an outdoor air bypass passage 18 disposed at a position humidity-insulated, for example outside the main body case 3, is connected. An electric valve 19 is installed in the bypass passage 18, and the area of the passage is adjusted by a control circuit 20 based on the detected value of a humidity sensor (not shown) that detects indoor humidity. The ventilation resistance is selected to allow most of the flow.

Next, the effect will be explained.

When the concentration of pollutants in the indoor air exceeds a set level, the control circuit 17 starts operating the blowers 15 and 16 to exchange indoor air with outdoor air.

For this exchange, there are two outdoor air flows. One is the 4th heat exchanger that exchanges sensible heat with the indoor air flowing through the indoor air passage 7, and the second is the 5th heat exchanger that exchanges latent heat with the indoor air. (including sensible heat)
At the same time, the humidity is exchanged, and the outdoor air outlet 13.
Blower16. With the flow discharged into the room through the opening 14,
The other flow is a flow that is discharged into the room through the outdoor air bypass passage 18, the electric valve 19, and the opening 14 after sensible heat exchange in the heat exchanger 4 section. The outdoor air flow rate of each of these two flows is varied depending on the indoor humidity layer. For example, as the indoor humidity becomes high, the control circuit 20 increases the opening degree of the stain valve 19 and the outdoor air bypass passage. While the outdoor air flow rate flowing through the heat exchanger 18 increases, the heat exchanger 5 performs humidity exchange.
The outdoor air flow rate flowing through the outdoor air passage 7 inside the room decreases.

As a result, the temperature of the outdoor air discharged into the room from the opening 14 is adjusted by heat exchange with the indoor air, and the humidity is adjusted according to the indoor humidity. Air conditioning is provided.

In the above embodiment, the heat exchanger 5 is used for both heat exchange and humidity exchange, but as long as the amount of heat exchanged by the heat exchanger 4 is sufficient, it may be used for only humidity exchange. Also,
As a mechanism for adjusting the passage area of the outdoor air bypass passage 18, an electric valve 19 whose opening degree changes depending on the indoor humidity is provided, but an orifice or a constriction whose opening area changes depending on the indoor humidity may also be used. Arrangement of heat exchangers 4 and 5: Reverse arrangement may be used. Specifically, the heat exchanger 5, which performs both heat exchange and humidity exchange, is placed outside the room, while
This is a configuration in which a heat exchanger 4 that only performs heat exchange is located on the indoor side.

Furthermore, if a humidifier that humidifies in accordance with the indoor humidity is provided in the main body case 3 on the downstream side of the outdoor air outlet 13 of the heat exchanger 5, the startup performance of humidity control can be improved and the indoor drying time can be improved. humidification can be performed.

In addition, the on/off operation of the blowers 15 and 16 was configured to be controlled by the control circuit 17 based on the pollutant concentration.
It may also be configured to be performed manually.

Furthermore, although the outdoor air bypass passage 1B is configured to be located outside the main body case 3, the outdoor air bypass passage 18, which is made of a non-moisture permeable material, can be housed inside the main body case 3, thereby improving the aesthetic appearance. At the same time, heat exchange is also possible within the outdoor air bypass passage, achieving even greater energy savings than in the embodiments described above.

As explained above, according to the present invention, a heat exchanger of an air conditioning ventilation fan that exchanges heat between indoor air discharged to the outside and outdoor air taken into the room is connected to a non-moisture-permeable heat exchanger. It is formed of moisture permeable parts for humidity exchange connected in series, and an outdoor air bypass passage is formed in parallel with the outdoor air passage of the moisture permeable part and is hygroscopically insulated from the indoor air passage. Since the structure is equipped with a means to adjust the passage area according to the indoor humidity, it is possible to remove indoor pollutants and at the same time adjust the temperature and humidity of the inhaled outdoor air, providing comfortable and energy-saving air conditioning. It is possible to provide an air conditioning ventilation fan that can be operated with a single device.

[Brief explanation of drawings]

The figure is a schematic sectional view of an air conditioning ventilation fan that is an embodiment of the present invention.

Claims (2)

[Claims] (1) In an air conditioning ventilation fan that is equipped with a heat exchanger that exchanges heat between indoor air discharged outdoors and outdoor air drawn into the room, and a blower for discharging indoor air and sucking outdoor air, the heat exchanger is , formed of a non-moisture-permeable heat exchange part and a moisture-exchange part connected in series to the heat exchange part, which is parallel to the outdoor air passage of the moisture-permeable part and is hygroscopically insulated from the indoor air passage. An air conditioning ventilation fan characterized by forming an outdoor air bypass passage and providing means for adjusting the passage area in accordance with indoor humidity in the bypass passage. (2) The air-conditioning ventilation fan according to claim 1, wherein the humidity-appropriate section has a heat exchange function for latent heat.