JPH0155385B2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Fields In recent years, as a means of ventilating a room that is being heated and cooled, a method has been developed to exhaust dirty air from inside the room to the outside, bring in fresh air from outside, and mix it with the air inside the room. BACKGROUND ART Air ventilation fans have come into use that exchange heat with outdoor air, transfer thermal energy from exhausted indoor air to outdoor air, and recover it indoors. And as homes become more airtight, their popularity has been remarkable. The present invention relates to an air conditioning ventilation fan that recovers indoor thermal energy that is discharged to the outside through ventilation of such a house.

Conventional configuration and its problems Figures 1 and 2 show the conventional air conditioning ventilation fan.
This will be explained based on the diagram.

In the figure, 103 is a main body having an outdoor outlet 104 and an outdoor suction port 105 at the center of the back side, and an indoor suction port 101 on the right side, and a louver 100 is removably fitted on the front side. There is. This louver 100 has an indoor discharge port 102 on the left side of the front surface. Inside the main body 103 is the indoor suction port 10.
1 and the outdoor side outlet 104, and an air supply passage 107 that communicates the indoor side outlet 102 and the outdoor side suction port 105.
A heat exchange element 108 is provided at the intersection of the exhaust passage 106 and the air supply passage 107. An exhaust vane 109 for blowing air is disposed in the exhaust passage 106, and the air supply passage 107
Air supply vanes 110 for blowing air are arranged.
The exhaust vanes 109 and the air supply vanes 110 are rotated by a motor 111.

In the above configuration, when the exhaust vane 109 and the air supply vane 110 are rotated by the motor 111,
Indoor air sucked in from the indoor side suction port 101 of the main body 103 is transferred to the heat exchange element 10 as shown by arrow A→A'.
8 and is discharged to the outside from the outdoor outlet 104 of the main body 103 through the exhaust passage 106. The outside air sucked in from the outdoor side suction port 105 of the main body 103 is transferred to the air supply passage 107 as shown by the arrow B→B'.
through the heat exchange element 108 to the louver 100
It is discharged indoors from the indoor side discharge port 102 of. At this time, the thermal energy of the outside air and the indoor air are exchanged with each other inside the heat exchange element 108, and the thermal energy of the indoor air is recovered indoors.

However, in the above configuration, since there is only one heat exchange element 108, the heat transfer area is small, and the exhaust vane 109 and the air supply vane 1
There is a considerable difference in the distance from the center of the heat exchange element 108 to the end faces of the heat exchange element 108, and because the passing air volume is not uniform, the entire heat exchange element is not working effectively, and the amount of recovered thermal energy, that is, the heat exchange rate. It was also low. In addition, the size of the heat exchange element is limited due to the product appearance and it is difficult to increase the size, so the cross-sectional area of the exhaust passage and air supply passage inside the heat exchange element becomes small, which increases ventilation resistance loss and reduces ventilation. The amount of wind was also low. Furthermore, due to the large ventilation resistance loss, static pressure was applied to the exhaust vanes 109 and the air supply vanes 110, resulting in high rotational speed and large noise.

In order to overcome these drawbacks with conventional air conditioning ventilation fans, it is possible to increase the size of the heat exchange element to increase the heat transfer area and reduce ventilation resistance loss, but this would increase the size of the main unit itself. This made installation work extremely difficult and caused problems such as poor appearance.

Purpose of the Invention The present invention solves these conventional drawbacks, and improves the heat exchange efficiency by making the size of the main body the same or smaller than the conventional one, reducing noise and making installation easier. The present invention provides an air conditioning ventilation fan that facilitates the use of air conditioners.

Structure of the Invention The present invention performs heat exchange ventilation by forming an exhaust passage and an air supply passage by providing a plurality of heat exchange elements on the outer periphery of the exhaust vane and air supply vane provided in the center of the main body. In addition, by providing multiple heat exchange elements on the outer periphery of the exhaust vane and air supply vane, the volume of the heat exchange element is increased and the heat transfer area is increased, improving the heat exchange rate and improving the heat exchange efficiency. To reduce noise by reducing ventilation resistance loss of an element, and to provide a chamber part on the back side of the main body, to communicate an outdoor side discharge port with the chamber part, and to form an outdoor side suction port to pass through the chamber part. The heat exchange rate has also been improved, and the duct connection port, which is separated into two layers by the central partition wall, is connected to each of the above exhaust and air supply passages, and is provided on the back of the main unit to facilitate installation work. It is.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. 3 to 6. In the figure, 4 has an outdoor side discharge port 5 and an outdoor side suction port 6 arranged in parallel at the center of the back side,
It is a rectangular main body having an exhaust vane 7, an air supply vane 8, and a motor 9 for rotating them in the center thereof, and a louver 1 is removably fitted on the front surface. The louver 1 has an indoor suction port 2 at the center of the front surface and indoor discharge ports 3 on the left and right sides thereof. A substantially trapezoidal space is formed between the air exhaust vanes 7 and the air supply vanes 8 and the four corners of the main body 4, and a heat exchanger plate 11 is formed in this space. Four heat exchange elements 10 are provided, which are stacked at predetermined intervals and have mutually independent passages alternately formed therein. This heat exchange element 10 is cut at a predetermined angle with respect to the stacking direction of the heat exchanger plates 11 to form a rectangular surface 18, and two end surfaces 19 and 20 facing each other with only two corners at 90 degrees are shaped like trapezoidal columns. It is said that The heat exchange element 10 has two sides on the surface 18.
One suction port 18a communicates with the discharge port on the end surface 19, the other suction port 18b communicates with the discharge port on the end surface 20, and the two passages connect the heat exchanger plate 11. They are interposed and intersect with each other. A chamber part 14 is provided on the back side of the main body 4, and an outdoor side outlet 5 opening into the chamber part 14 and an outdoor side suction port 6 penetrating through the chamber part 14 are connected to each other by a central partition wall 16. A cylindrical duct connection port 15 separated into two layers is connected in a protruding manner. Then, the indoor suction port 2 of the louver 1
, an exhaust passage 12 (arrow C→C' in the figure) that communicates with the outside from the outdoor outlet 5 via the exhaust vane 7 , the four heat exchange elements 10 , and the chamber 14 , and the outdoor suction of the main body 4 . An air supply passage 13 (indicated by arrow D in the figure) communicates from the opening 6 to the indoor side discharge port 3 of the louver 1 through the air supply vane 8 and four heat exchange elements 10.
→D′) is formed. 17 in the figure is the motor 9
His slender arms support him.

In the above configuration, when the exhaust vane 7 and the air supply vane 8 are rotated by the motor 9, the louver 1
Indoor air sucked in from the indoor side suction port 2 passes through the exhaust passage 12 as shown by arrows C→C', passes through four heat exchange elements 10, and then reaches the chamber part 1 on the back of the main body.
4 and is discharged outdoors from the outdoor discharge port 5 of the main body 4. Then, the outside air sucked in from the outdoor side suction port 6 of the main body 4 passes through the air supply passage 13 as shown by the arrow D→D', passes through the four heat exchange elements 10,
It is discharged indoors from the indoor side discharge port 3 of the louver 1. At this time, the thermal energy of the outside air and the indoor air are exchanged with each other inside the heat exchange element 10, and the thermal energy of the indoor air is recovered indoors. In this case, the passing air volume (processing air volume) per heat exchange element that performs heat exchange may be small, so the heat transfer area per unit air volume becomes large.
In addition, the four heat exchange elements 10 are cut at a predetermined angle with respect to the stacking direction of the heat exchanger plates 11, and only two corners are cut.
Since trapezoidal columns with an angle of 90° are provided on the outer periphery of the exhaust vane 7 and the air supply vane 8, the distance from the exhaust vane 7 and the supply air vane 8 is the same as that of each heat exchange element. 10, and all four heat exchange elements 10 work effectively, making it possible to increase the heat exchange rate. In addition, since each heat exchange element 10 is cut at a predetermined angle with respect to the stacking direction of the heat exchanger plates, the inlet area of the air from the exhaust vanes 7 and the air supply vanes 8 is large. Furthermore, since there are four of them, ventilation resistance loss is reduced, a large amount of ventilation air is obtained, and the static pressure applied to the exhaust vanes 7 and air supply vanes 8 is also low, which lowers the rotation speed. Noise is extremely low.

Furthermore, since the outdoor side suction port 6 of the air supply passage 13 penetrates the chamber portion 14, which is the exhaust passage 12, heat is exchanged at the boundary surface 6a, increasing the heat exchange rate. In addition, since the exhaust passage 12 is provided with a chamber portion 14, and the outdoor side discharge port 5 and the outdoor side suction port 6 are provided in the duct connection port 15 separated into two layers by the central partition wall 16, one It has the advantage that it can be installed simply by drilling a duct hole in the installation wall.

Effects of the Invention As is clear from the description of the embodiments described above, according to the present invention, a plurality of heat exchange elements are provided on the outer periphery of the exhaust vane and the air supply vane provided in the center of the main body, thereby improving the exhaust passage. Since it is configured to perform heat exchange ventilation by forming an air supply passage with the heat exchanger, the heat transfer area of the heat exchange element is larger than before, which improves the heat exchange efficiency and reduces ventilation resistance loss. Since a large amount of ventilation air can be obtained, the static pressure applied to the exhaust vanes and the air supply vanes is low, and the rotational speed is also low, noise can be extremely low. Furthermore, the single duct connection port provided on the back of the main unit is divided into two layers by a partition wall, and each communicates with the outdoor outlet and outdoor suction port, so it can be installed by just drilling a single duct hole. This simplifies the installation work, and since the outdoor suction port is connected to the air supply passage through the chamber that leads to the outdoor discharge port on the back of the main unit, heat is recovered from the exhaust air in this area as well. It is possible to achieve the following effects.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a conventional air-conditioning ventilation fan, FIG. 2 is a front view of a conventional air-conditioning ventilation fan with main parts cut out, FIG. 3 is a cross-sectional view of an air-conditioning ventilation fan according to an embodiment of the present invention, and FIG. FIG. 5 is a perspective view of the heat exchange element, and FIG. 6 is an explanatory perspective view of the supply and exhaust passages. 1...Louver, 2...Indoor side suction port, 3...Indoor side discharge port, 4...Main body, 5...Outdoor side discharge port,
6... Outdoor suction port, 7... Exhaust vane, 8...
Air supply vane, 9...Motor, 10...Heat exchange element, 11...Heat transfer plate, 12...Exhaust passage, 13...
...Air supply passage, 14...Chamber part, 15...Duct connection port, 16...Partition wall.

Claims (1)

[Claims] 1. A louver 1 having an indoor side suction port 2 and an indoor side discharge port 3, to which the louver 1 is attached, and has an outdoor side discharge port 5 and an outdoor side suction port 6, and a central portion The main body 4 is provided with an exhaust vane 7, an air supply vane 8, and a motor 9 for rotating them, and a heat exchanger plate 11 is stacked at a predetermined interval to form mutually independent passages alternately. The heat exchange elements 10 are installed in the main body 4 and arranged on the outer periphery of the exhaust vanes 7 and the air supply vanes 8, and An exhaust passage 12 that communicates between the indoor suction port 2 and the outdoor discharge port 5 of the main body, and an air supply passage 13 that communicates the indoor discharge port 3 of the louver 1 with the outdoor suction port 6 of the main body 1. are formed respectively, and the exhaust passage 12
The chamber part 14 is provided on the back of the main body, and the outdoor side discharge port 5 is communicated with the chamber part 14, and the outdoor side suction port 6 of the air supply passage 13 is connected to the chamber part 14.
passes through the chamber part 14, and furthermore, the outdoor side discharge port 5 and the outdoor side suction port 6 are separated into two layers by a partition wall 16, and each communicates with a duct connection port 15 provided in the chamber part 14. Ventilation fan. 2. Each of the heat exchange elements 10 is cut at a predetermined angle with respect to the stacking direction of the heat exchanger plates 11, and only two corners are cut.
Claim 1: Trapezoidal columnar shape with an angle of 90°
Air conditioning ventilation fan as described in section.