JPH11108411A - Heat-exchange type ventilation fan and ventilation method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To supply fresh air in a living room and to discharge fouled air and a smell to an outdoor place by a method wherein outdoor air and indoor air are simultaneously fed and discharged, a supply amount is increased to a value higher than an exhaust amount, and an atmosphere pressure in the living room is increased to a higher value compared with a peripheral atmosphere pressure. SOLUTION: A heat-exchange ventilation fan 10 is provided with a grill 18 fitted in a ventilation port 16 opened to an outer wall 14 of a building 12. The grill 18 is partitioned into upper and lower parts by a partition plate 20 to form an exhaust passage 22 and a supply passage 24. An exhaust fan 26 is arranged in the exhaust passage 22 and a supply fan 28 in the supply passage 24. The exhaust fan 26 has diameter reduced to a value lower than that of the supply fan 28 and has a supply amount set to a value higher than an exhaust amount. When the ventilation fan 10 is operated, outdoor air 32 is heat-exchanged with indoor air 34 by a heat-exchanger 30 and introduced in a living room 36. An atmosphere pressure in the living room 36 is increased to a higher value compared with an atmosphere pressure in a corridor, and fouled air and gap air hardly enter the living room 36 from a periphery.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a heat exchange type ventilation fan and a ventilation method.

[0002]

2. Description of the Related Art As a method of ventilation in a room, a ventilation fan for exhaust is provided in a sanitary zone such as a kitchen or a toilet to make a negative pressure, and a flow of air from an intake port provided in each living room to a ventilation fan is forcibly created. A ventilation system for ventilating the entire building has been proposed (see Japanese Patent Application Laid-Open No. 7-55215).

However, in the above method, the ventilation performance depends on the capacity of the ventilation fan, and thus cannot be said to be an efficient ventilation method. In addition, during heating, warm air in the living room is exhausted, so that thermal efficiency is not good.

Therefore, as shown in FIGS. 5 and 6, a heat exchange type ventilation fan 44 is provided in the living room 36, and when the outdoor air supplied by the air supply fan 46 passes through the heat exchanger 30, the exhaust fan Heat exchange with the room air exhausted at 48
There is one that does not lower the temperature of 6.

However, the conventional heat exchange type ventilation fan 44 is
The exhaust amount is set to be larger than the supply amount. This is because it is assumed that a cold region is used as a region where the heat exchange type ventilation fan 44 is used, so that it is necessary to raise the outside air to a temperature at which the user does not feel uncomfortable and take it into the living room 36.

However, if the amount of exhaust air is larger than the amount of air supply, the air pressure in the living room 36 becomes lower (corridor 50 or sanitary zone 5).
As compared with 2), the air becomes dirty, such as the sanitary zone 52, and the outside air flows into the living room 36 from the gap in the entrance. In addition, outside air easily enters as a draft from the gap between the sashes 54 in the living room 36.

[0007]

SUMMARY OF THE INVENTION In view of the above, an object of the present invention is to make the pressure in a living room higher than the pressure in the surroundings without significantly lowering the temperature of the whole living room.

[0008]

According to the first aspect of the present invention, outdoor air and indoor air are simultaneously supplied and exhausted, and heat exchange is performed between the supplied air and the exhaust air. Since the supply air amount is larger than the exhaust air amount, the air pressure in the living room is higher than the air pressure in the surroundings (outdoors, sanitary zones, etc.). This makes it difficult for dirty air and draft to enter the living room from the periphery.

It should be noted that the present invention was created not only by simply increasing the supply air volume than the exhaust air volume, but by partially changing the basic idea of a heat exchange type ventilation fan for use in cold regions. is there.

That is, in the conventional heat exchange type ventilation fan, the supply air amount is made smaller than the exhaust air amount, the outdoor air is heated to a predetermined temperature by the heat exchanger, and unpleasant cool air is prevented from being introduced into the living room. I have. However, considering the heat capacity of the whole room,
Exhausting a large amount of warm room air does not necessarily mean that the room temperature will not be reduced. Rather, it is better to increase the air supply and reduce the exhaust,
This is because energy efficiency may be appropriate. The present invention has been born from such an idea of reversal.

According to the second aspect of the present invention, the capacity of the air supply fan for supplying outdoor air is greater than the capacity of the exhaust fan for exhausting indoor air. As a result, the supply air amount becomes larger than the exhaust air amount. Note that various methods can be considered as means for making a difference in performance, such as making a difference in fan size and rotation speed.

According to the third aspect of the invention, the air resistance of the exhaust passage for exhausting indoor air is made larger than the air resistance of the air supply passage for supplying outdoor air. As a result, the supply air amount becomes larger than the exhaust air amount. Means for providing an air resistance difference to the passage include the length of the passage, the pipe diameter, the number of turns,
Various methods such as the roughness of the passage surface and the like can be considered.

According to the fourth aspect of the present invention, a heat exchange type ventilation fan having an air supply amount larger than an exhaust amount is installed in the living room, and an exhaust ventilation fan is installed in the room where the sanitary facilities are arranged. ing. By driving the heat exchange type ventilation fan and the exhaust ventilation fan, the living room has a positive pressure and the room in which the sanitary facilities are arranged has a negative pressure.

For this reason, air flows from the living room to the room where the sanitary facilities are arranged, and fresh outdoor air is taken into the living room without being influenced by external factors such as the wind direction, and the dirty air is sanitized. It is discharged from the room where the equipment is located.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS As shown in FIGS. 1 and 2, a heat exchange type ventilation fan 10 according to the present embodiment includes a grill 18 fitted into a ventilation opening 16 opened in an outer wall 14 of a building 12. The grill 18 is vertically divided by a partition plate 20, and the exhaust plate 22 and the air supply passage 24 are separated by the partition plate 20.
Is configured.

An exhaust fan 26 is disposed in the exhaust passage 22, and an air supply fan 28 is disposed in the air supply passage 24. The air supply and discharge operations are simultaneously performed by a motor (not shown). The exhaust fan 26 is provided with an air supply fan 28.
The diameter is smaller, and the air supply amount is set to be larger than the exhaust amount.

The heat exchanger 3 is located at the back of the grill 18.
0 is arranged, and the supplied outdoor air 32 and the exhausted indoor air 34 exchange heat in the heat exchanger 30.

Next, the operation of the heat exchange type ventilation fan according to this embodiment will be described. As shown in FIG. 2, when the heat exchange type ventilation fan 10 is operated, the outdoor air 32 exchanges heat with the indoor air 34 in the heat exchanger 30 and is introduced into the living room 36. Here, since the supply air amount is larger than the exhaust air amount, the air pressure in the living room 36 becomes higher than the air pressure in the surrounding corridor 38 and the sanitary zone 40. This makes it difficult for dirty air or draft to enter the living room 36 from the periphery.

As shown in FIGS. 3 and 4, an exhaust ventilation fan 42 may be provided in the sanitary zone 40, and the sanitary zone 40 may be set at a negative pressure. With this, living room 3
6 becomes a positive pressure and the sanitary zone 40 becomes a negative pressure, and an air flow from the living room 36 toward the sanitary zone 40 occurs. The fresh outdoor air 32 is taken into the living room 36 without being affected by external factors such as the wind direction. As a result, dirty air, odor, moisture and the like are discharged from the sanitary zone 40.

In this embodiment, a difference in fan size is provided as a means for increasing the supply air amount to the exhaust air amount.
Various methods are conceivable, such as making a difference in the number of rotations. Further, even if the air resistance between the air supply passage 24 and the exhaust passage 22 is made different, the air supply amount can be made larger than the exhaust amount.
Further, it goes without saying that the heat exchange type ventilation fan of the present invention can be used not only for heating but also for cooling.

[0021]

According to the present invention, the air pressure in the living room is made higher than the surrounding air pressure without changing the temperature of the whole living room so much. Air and odor can be discharged to the outside.

[Brief description of the drawings]

FIG. 1 is a schematic sectional view showing a heat exchange type ventilation fan according to the present embodiment.

FIG. 2 is a conceptual diagram showing a building provided with a heat exchange type ventilation fan according to the present embodiment and the flow of air.

FIG. 3 is a schematic sectional view showing a heat exchange type ventilation fan and an exhaust ventilation fan according to the embodiment.

FIG. 4 is a conceptual diagram showing a building provided with a heat exchange type ventilation fan and an exhaust ventilation fan according to the present embodiment and the flow of air.

FIG. 5 is a schematic sectional view showing a conventional heat exchange type ventilation fan.

FIG. 6 is a conceptual diagram showing a building provided with a conventional heat exchange type ventilation fan and the flow of air.

[Explanation of symbols]

 10. Heat exchange type ventilation fan. 26 exhaust fan 28 air supply fan 42 exhaust ventilation fan

Claims (4)

[Claims] 1. A heat exchange type ventilation fan for simultaneously supplying and discharging outdoor air and indoor air and exchanging heat between air supply and exhaust air, wherein the air supply amount is larger than the exhaust amount. 2. The heat exchange type ventilation fan according to claim 1, wherein the capacity of the air supply fan for supplying outdoor air is greater than the capacity of the exhaust fan for exhausting indoor air. 3. The heat exchange type ventilation fan according to claim 1, wherein the air resistance of an exhaust passage for exhausting indoor air is larger than the air resistance of an air supply passage for supplying outdoor air. 4. A heat exchange type ventilation fan whose supply air amount is larger than the exhaust amount is installed in the living room, an exhaust ventilation fan is installed in the room where the sanitary facilities are arranged, and the heat exchange type ventilation fan and the exhaust ventilation fan are driven. A ventilation method, wherein the living room is set to a positive pressure and the room where the sanitary facilities are arranged is set to a negative pressure.