JPH0222303B2 - - 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 conditioning 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.

Configuration of a conventional example and its problems A conventional air conditioning ventilation fan will be explained based on FIGS. 1 and 2. In the figure, 103 is an outdoor side discharge port 104 on the bottom surface and an outdoor side suction port 1 on the back side.
05, and a louver 100 is removably fitted to the front surface of the main body. The louver 100 has an indoor suction port 101 on the front surface and an indoor discharge port 1 on the top surface.
02. The indoor side suction port 101 and the outdoor side discharge port 104 communicate with each other through an exhaust passage 106, and the indoor side discharge port 102 and the outdoor side suction port 105 communicate with each other through an air supply passage 107. The exhaust passage 106 and the air supply passage 1
A heat exchange element 108 is provided at the intersection of 07,
The exhaust passage 106 has exhaust vanes 10 for blowing air.
9 is provided, and the air supply passage 107 is provided with air supply vanes 110 for blowing air. These exhaust vanes 109 and air supply vanes 110 are connected to the motor 111.
It is designed so that it can be rotated.

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 louver 100 flows through the heat exchange element 1 as shown by arrow A→A'.
08 and the main body 103 through the exhaust passage 106.
It is discharged to the outside from the outdoor side discharge port 104. The outside air sucked in from the outdoor side suction port 105 of the main body 103 flows into the air supply passage 10 as shown by arrow B→B'.
7 and the louver 10 through the heat exchange element 108.
It is discharged to the outside from the indoor discharge port 102 of No. 0.
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 into the room by the outdoor air.

However, in the above configuration, since there is only one heat exchange element 108, the heat transfer area is small, and the distance from the exhaust vane 109 and the air supply vane 110 is from the center of the heat exchange element 108 to both ends. There is a considerable difference in terms of surface area, and because the passing air volume is not uniform, the entire heat exchange element is not working effectively.
The amount of thermal energy recovered, that is, the heat exchange rate, was also low. In addition, the size of the heat exchange element 108 is limited due to the appearance of the product and it is difficult to increase it.
The cross-sectional area of the exhaust passageway and the air supply passageway inside the heat exchange element became smaller, the ventilation resistance loss became larger, and the ventilation air volume was also reduced. Furthermore, since the ventilation resistance loss was large, 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 and reduces noise even if the size of the main body is the same or smaller than the conventional one. The present invention provides an air conditioning ventilation fan that facilitates maintenance and inspection of heat exchange elements.

Structure of the Invention The present invention provides a plurality of heat exchange elements on the outer periphery of the exhaust vane and the air supply vane provided in the center of the main body. By providing a heat exchange unit integrated by a frame provided with a plurality of discharge ports communicating with an inner discharge port, an exhaust passage and an air supply passage are formed to perform heat exchange ventilation. By providing multiple heat exchange elements, the volume of the heat exchange element is increased, the heat transfer area is increased, the heat exchange efficiency is improved, and the ventilation resistance loss of the heat exchange element is reduced, reducing noise. By integrally forming the exchange element, the heat exchange element can be easily attached/detached and maintained/inspected.

DESCRIPTION OF THE EMBODIMENTS This embodiment will be described below with reference to FIGS. 3 to 8.

In the figure, 4 has an outdoor outlet 5 on both the left and right sides of the upper and lower surfaces, an outdoor suction port 6 at the center of the back, and an exhaust vane 7 and an air supply vane 8 in the center of the interior for rotating them. The main body has a square front face and has a motor 9, and a louver 1 is removably fitted to the front face. The louver 1 has an indoor suction port 2 at the center of the front surface, and indoor discharge ports on both sides thereof. A heat exchange unit 10 is detachably provided on the outer periphery of the exhaust vane 7 and the air supply vane 8. This heat exchange unit 10 includes a heat exchanger plate 11
are stacked at a predetermined interval, and mutually independent passages are formed alternately.
a slope 22 having an air supply side suction port 21; a first bottom surface 23 adjacent to the slope 22 and communicating with the exhaust side suction port 20; and a second bottom surface 24 communicating with the air supply side suction port 21. It has four heat exchange elements 12 in the shape of right triangular columns in which a part of an exhaust passage 16 and a part of an air supply passage 17 (described later) intersect with each other via a heat exchanger plate 11. , the heat exchange elements 12 are arranged at each of the four corners of the main body 4, and the suction port 13 communicates the indoor suction port 2 of the louver 1 with the exhaust vane 7; It is integrally formed with a square frame 15 made of iron plate and provided with four discharge ports 14 that communicate the outlet 3 and the second bottom surface 24. The heat exchange unit 10 is removably inserted into the front opening of the main body 4 from which the louver 1 has been removed, and is inserted into each right triangular space created between the exhaust and air supply vanes 7 and 8 and the four corners of the main body 4. A heat exchange element 12 is positioned therein.

Four heat exchange elements 1 of the heat exchange unit 10
2 communicates the indoor side suction port 2 of the louver 1 with the outdoor side discharge port 5 of the main body 4 via the suction port 13, the exhaust vane 7, the exhaust side suction port 20, and the first bottom surface 23. A part of the exhaust passage 16, the outdoor suction port 6 of the main body 4, and the indoor discharge port 3 of the louver 1.
The air supply vane 8 , the air supply side suction port 21 , the second bottom surface 24 , and a part of the air supply passage 17 that communicate with each other via the discharge port 14 are formed. The central part of the main body 4 has a rectangular shape with each side in contact with each slope 22 of the heat exchange element 12, and arms 18a extending from each corner toward the back side to fix the motor 9 to the main body 4. A motor support stand 18 is provided.

In the above configuration, when the exhaust vane 7 and the air supply vane 8 are rotated by the motor 9, the louver 1
The indoor air sucked in from the indoor side suction port 2 of the
→C, C→C′′'' through the exhaust passage 16, distributed from the exhaust side suction port 20 into the four heat exchange elements 12, and exhausted to the outside from the outdoor side suction port 5 of the main body 4, The outdoor air sucked in from the outdoor side suction port 6 of the main body 4 is directed by the air supply vane 8 in the direction of arrow D→
D', D→D", D→D, D→D'" It is discharged indoors from the indoor side discharge port 3. At this time, the thermal energy of the outside air and the indoor air are exchanged with each other inside the four heat exchange elements 12, and the thermal energy of the indoor air is In this case, the amount of air passing through each heat exchange element (processing air volume) that performs heat exchange may be small, so the heat transfer area per unit air volume becomes large. is cut at a predetermined angle to the stacking direction of the heat exchanger plate 11 to form a right triangular column,
Since it is provided on the outer periphery of the exhaust vane 7 and the air supply vane 8, the exhaust vane 7 and the air supply vane 8
The distance from the heat exchange element 12 is the same for each heat exchange element 12, and all four heat exchange elements 12 work effectively, making it possible to increase the heat exchange rate. In addition, since each heat exchange element 12 is cut at a predetermined angle with respect to the stacking direction of the heat exchanger plates 11, the inlet area of the air from the exhaust vanes 7 and the air supply vanes 8 is reduced. Because it is large and there are four of them, ventilation resistance loss is small, a large amount of ventilation air can be obtained, and the static pressure applied to the exhaust vanes and air supply vanes is low, which lowers the rotation speed. The noise level is extremely low. In addition, since the four heat exchange elements 12 are integrally formed by the frame 15, they can be easily attached and detached from the main body 4, and maintenance and inspection such as cleaning is easy. Since the element 12 is covered, it is less likely to be scratched during cleaning, extending the life of the heat exchange element. Further, since the suction port 13 of the exhaust vane 7 is provided in the heat exchange unit 10, the depth dimension of the main body is also reduced, and the structure of the main body is also simplified, which facilitates installation work and reduces manufacturing costs.

FIG. 9 shows another embodiment of the present invention, in which the same numbers as in the first embodiment indicate the same components. As shown in FIG. 8, the heat exchange element 1 has slopes 22 facing each other around the turbo-type exhaust vanes 7 and air supply vanes 8 that rotate clockwise, and the stacking direction of the heat exchanger plates 11 is vertical.
2 and a heat exchange element 12' in which the stacking direction of the heat exchanger plates 11 is horizontal are arranged next to each other,
The direction of the suction ports of the heat exchange elements 12, 12' and the airflow caused by the rotation of the exhaust vanes 7 and air supply vanes 8 are configured to be in substantially the same direction.

In the above configuration, when the exhaust vane 7 and the air supply vane 8 are rotated by the motor 9, indoor air and outside air flow, making it possible to perform heat exchange ventilation as in the first embodiment. In this case, as in the above configuration, the heat exchanger plate 1 of the heat exchange element 12
The stacking direction of the heat exchanger element 12' is vertical, and the stacking direction of the heat exchanger plates 11 of the heat exchange element 12' is horizontal, and they are arranged next to each other to prevent airflow due to the rotation of the exhaust vanes 7 and the supply air vanes 8. Heat exchange element 12,1
Since it was made to be approximately the same as the suction port direction of 2',
Air flows smoothly from the exhaust vanes 7 and the air supply vanes 8, and ventilation resistance loss is reduced, so the ventilation air volume increases and the rotational speed decreases.
Noise is reduced. Furthermore, air turbulence at the air inlets of the heat exchange elements 12, 12' is reduced, resulting in effects such as a reduction in noise.

Effects of the Invention As described above, according to the present invention, a heat exchanger is provided in which a plurality of heat exchange elements are integrally formed by a frame on the outer periphery of the exhaust vane and the air supply vane provided in the center of the main body. Since the configuration is such that heat exchange ventilation is performed by providing a unit and forming an exhaust passage and an air supply passage, the heat transfer area of the heat exchange element is increased, thereby improving the heat exchange efficiency and reducing ventilation resistance loss. Since the amount of air is small, 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, so noise can be extremely low. Furthermore, since the plurality of heat exchange elements are integrally formed by the frame, they can be easily attached and detached from the main body, making maintenance and inspection such as cleaning easier, and the life of the heat exchange elements is extended.
Furthermore, since the main body structure is simplified, installation work is simplified, and manufacturing costs are also reduced.

[Brief explanation of drawings]

Fig. 1 is a cross-sectional view of a conventional air-conditioning ventilation fan, Fig. 2 is a front view with the 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. 4 is the same main part. 5 is a cutaway front view of the heat exchange element, FIG. 6 is a perspective view of the heat exchange unit from the front, and FIG. 7 is a perspective view of the heat exchange unit from the back. Figure 8 is an explanatory exploded perspective view of the main parts of the supply and exhaust passages, Figure 9
The figure is a front view of another embodiment of the present invention with main parts cut away. 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 unit, 11...Heat exchange plate, 12, 12'...Heat exchange element, 13...Suction port, 14...Discharge port, 15...
...frame body, 16...exhaust passage, 17...air supply passage.

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 includes a main body 4 provided with an exhaust vane 7, an air supply vane 8, and a motor 9 for rotating them, and a heat exchanger plate 1.
1 are stacked at predetermined intervals and mutually independent passages are alternately formed, and the heat exchange elements 12 are communicated with the indoor suction port 2 of the louver 1. The suction port 13 of the exhaust vane 7 and a plurality of discharge ports 14 communicating with the indoor discharge port 3 are integrated by a frame 15 to form a heat exchange unit 10. is detachably attached to the inside of the main body 4 and is arranged on the outer periphery of the exhaust vane 7 and the air supply vane 8 to connect the indoor suction port 2 of the louver 1 and the outdoor discharge port 5 of the main body 4. an exhaust passage 16 that communicates with
and an air conditioning ventilation fan in which an air supply passage 17 is formed to communicate the indoor side discharge port 3 of the louver 1 with the outdoor side suction port 6 of the main body 4. 2. The air conditioning ventilation fan according to claim 1, wherein each of the heat exchange elements 12 is cut at a predetermined angle with respect to the stacking direction of the heat exchanger plates 11, and is formed into a columnar shape of a right triangle. 3 The heat exchange elements 12 are arranged so that the stacking directions of the heat exchanger plates 11 of the adjacent heat exchange elements 12 and 12' are horizontal and vertical, or vertical and horizontal, and each heat exchange element The air conditioning ventilation fan according to claim 1 or 2, wherein 12 is configured to suck air in substantially the same direction as the airflow caused by the rotation of the exhaust vanes 7 and the air supply vanes 8.