JPH0554016B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to an air conditioning ventilation fan for a duct that recovers thermal energy from indoor air exhausted to the outside through ventilation.

Conventional technology In recent years, as a means of ventilating a room that is being cooled or heated, a method has been developed to exhaust dirty air from the room to the outside, bring in fresh air from the outdoors, and exchange heat between the indoor air and the outdoor air. Duct air conditioning ventilation fans have come into use that exchange heat through a chamber, transfer the thermal energy of exhausted indoor air to outdoor intake air, and recover it indoors.

In addition, circulators are used to smooth out indoor temperature fluctuations during heating and cooling, and during the intermediate seasons such as spring and autumn, it may be more economical and more comfortable to supply outside air directly into the room. There have also been requests for normal ventilation that can be done without the need for ventilation.

Furthermore, since duct air-conditioning ventilation fans are generally installed in the ceiling, there was a demand for one with a low body height.

For this reason, the conventional duct air conditioning ventilation fan has an air supply passage 104 and an exhaust passage in a main body 103 that incorporates blowers 101 and 102 for taking in outside air and discharging indoor air, as shown in FIG. 5, for example. A heat exchanger 107 is provided at the intersection 106 of the heat exchanger 105 with the longitudinal direction horizontally, and the indoor suction part 109 and the exhaust air of the heat exchanger 107 are provided in the exhaust bypass space 108 on a route that does not pass through the heat exchanger 107. A damper 11 that can be opened and closed and partitions the outlet side space 110
1 was set up.

Problems to be Solved by the Invention In such a conventional duct air conditioning ventilation fan, if a large amount of air is required, a heat exchanger 107 with a relatively large air passage surface is required, and an exhaust bypass space 108 is also required. , the main body 103 becomes large and particularly tall, the height of the ceiling is required to be high, the floor height of the building becomes high, and it is necessary to simply circulate the room without ventilation to eliminate uneven temperature inside the room. However, there was a problem in that building construction costs were high because the circulator had to be installed separately.

The present invention has taken into account the above-mentioned conventional problems, and provides an air conditioning ventilation fan for ducts that can reduce the height of the main body even if it is provided with a normal ventilation function and a circulation function in addition to heat exchange ventilation, and is advantageous in building construction costs. The purpose is to

Means for Solving the Problem In order to solve this problem, the present invention provides a plurality of heat exchangers arranged in parallel with each other in a rectangular prism shape in the main body, and each of the heat exchangers has a A first space serving as an independent air passage is formed between the exhaust air passage surfaces, and a second space serving as an independent air passage is also formed between the supply air passage surfaces, and is connected to the indoor discharge port in the main body. A supply air blower is provided in the air passage leading to the outdoor outlet, and an exhaust air blower is provided in the air passage connected to the outdoor outlet. Independent dampers are provided to open and close the space, and heat exchange air, normal ventilation, and air circulation are performed by selectively opening and closing each of the dampers.

Effect In the above configuration, by switching the damper, the air passage from the indoor suction port to the first space, the heat exchanger to the outdoor discharge port, and the outdoor air intake port to the second space and the heat exchanger. an air path (heat exchange air path) from the indoor side suction port to the indoor side discharge port, an air path from the indoor side suction port to the outdoor side discharge port via the first space portion, and an air path from the outdoor side suction port to the outdoor side discharge port via the second space portion. Forms an air path leading to the indoor discharge port (ventilation air path), an air path from the indoor suction port to the indoor discharge port, and an air path from the outdoor suction port to the outdoor discharge port (circulation air path). That will happen.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 4.

In the figure, 1 is the main body of a duct air conditioning ventilation fan, which has an indoor suction port 2 and an indoor discharge port 3 that communicate with the room on one side, and an outdoor suction port 4 that communicates with the outdoors and an indoor air intake port on the other side. Outer outlet 5
has been established. Inside the main body 1, a supply air blower 6 is provided in the air path leading to the indoor outlet 3, an exhaust air blower 7 is provided in the air path leading to the outdoor outlet 5, and two blowers with the same specifications are installed. heat exchanger 8,
8 are arranged. The heat exchangers 8, 8 are formed into a rectangular prism shape by laminating a plurality of partition plates 9 and spacing plates 10 alternately, and exhaust air so that the supply air flow and the exhaust air flow alternately flow orthogonally between the laminated layers. The passage 11 and the air supply passage 12 are formed, and the exhaust air passage surface 13a, which serves as the intake port for the exhaust air flow, and the supply air passage surface 13b, which serves as the intake port for the supply air flow, are inclined at 45 degrees with respect to the horizontal plane, and the exhaust air passage surface The ridge lines 14, 14 where the air supply air road surface 13a intersects with the air supply air road surface 13b are arranged so as to be in contact with each other. Then, a first space 16 is formed surrounded by the exhaust air passage surfaces 13a, 13a of both heat exchangers 8, 8 and the main body top surface 15, and the supply air air passage surface 1
3b, 13b and the bottom surface 18 of the main body 1 form a second space 19. The indoor suction port 2 of the main body 1 communicates with the first space 16, so that the indoor suction port 2, the first space 16, and the exhaust air of the two heat exchangers 8, 8 are connected to the first space 16. Passage 11,1
1. A main body exhaust passage 17 leading to an exhaust blower 7 and an outdoor outlet 5 is formed. The outdoor suction port 4 communicates with the second space 19, so that the outdoor suction port 4 is connected to the second space 19, the air supply passages 12, 12 of the two heat exchangers 8, 8, and the intake air. A main body air supply passage 20 leading to the air blower 6 and the indoor discharge port 3 is formed. The main body air supply passage 20 and the main body exhaust passage 17 are formed independently from each other by an L-shaped partition wall 21.

Furthermore, dampers that open and close independently are provided at both ends of the first and second spaces 16 and 19 inside the main body 1. In other words, the indoor suction port 2
and the first space 16, and the air supply passage 1 of the heat exchangers 8, 8 without passing through the indoor suction port 2 and the heat exchangers 8, 8.
A first damper 23 that can be opened and closed from the first outlet side space 22 of No. 2 and 12, and a first space 16
and a second damper 25 that can open and close the second outlet side space 24 of the exhaust passages 11, 11 of the heat exchangers 8, 8 without passing through the heat exchangers 8, 8, and the outdoor side suction port 4. and the second space 19, and the outdoor suction port 4 and the second outlet side space 24 of the exhaust passages 11, 11 of the heat exchangers 8, 8 without passing through the heat exchangers 8, 8. The third damper 26 partitions the second space 19 into the first outlet side space 22 of the air supply passages 12, 12 of the heat exchangers 8, 8 without passing through the heat exchangers 8, 8. A fourth damper 27 is provided which partitions the housing so as to be openable and closable.

In the above configuration, when passing through two heat exchangers 8 and 8 as shown in FIG.
When the duct air conditioning ventilation fan is operated with the damper 26 horizontally opened and the second damper 25 and fourth damper 27 vertically closed, the indoor air is transferred to the indoor suction port by the exhaust blower 7. 2, reaches the first space 16, and is divided into the exhaust air passage surface 13a of one heat exchanger 8 and the exhaust air passage surface 13a of the other heat exchanger 8, and is sucked into each heat exchanger 8. , 8 through exhaust passages 11, 11,
One side is sucked into the suction port of the exhaust blower 7, and the other side bypasses the side surface of the main body 1 and enters the second outlet side space 2.
4 and is also sucked into the suction port of the exhaust blower 7. Then, it is discharged from the outdoor discharge port 5. On the other hand, the outdoor air is sucked in from the outdoor suction port 4 by the air supply blower 6, reaches the second space 19, and is passed through the two heat exchangers 8 as in the case of the indoor air. . The air is also sucked into the air supply blower 6. Air is then supplied from the indoor discharge port 3.
Heat is exchanged between the exhaust air flow and the supply air flow in respective heat exchangers.

Next, when the heat exchangers 8, 8 are not passed as shown in FIG. 3, the first, second, third, fourth dampers 23,
When the duct air conditioning ventilation fan is operated with all 25, 26, and 27 opened horizontally, indoor air is sucked in from the indoor suction port 2 by the exhaust blower 7, and passes through the heat exchangers 8 and 8. The air directly passes through the second outlet side space 24 from the first space 16, is sucked into the suction port of the exhaust blower 7, and is discharged from the outdoor side discharge port 5. On the other hand, the air on the outdoor side is sucked in from the outdoor side suction port 4 by the air supply blower 6, and directly flows into the second space 1 without passing through the heat exchangers 8, 8.
9, passes below the first outlet side space 22, detours toward the supply air blower 6, and is sucked into the suction port,
Air is supplied from the indoor discharge port 3. The above exhaust flow and supply air flow do not exchange heat, but perform a so-called ventilation operation.

Furthermore, when the duct air conditioning ventilation fan is operated with all the first, second, third, and fourth dampers 23, 25, 26, and 27 vertically closed as shown in FIG.
Indoor air is sucked in from the indoor side suction port 2 by the air supply blower 6, detours downward and directly passes through the first outlet side space 22, and then passes through the air supply blower 6.
The air is sucked into the suction port 3 and supplied from the indoor discharge port 3. On the other hand, the air on the outdoor side is sucked in from the outdoor side suction port 4 by the exhaust blower 7, detours upward, and directly passes through the second outlet side space 24.
It is sucked into the suction port of the exhaust blower 7 and discharged from the outdoor discharge port 5. The above exhaust flow and supply air flow are
They flow from indoor to indoor and from outdoor to outdoor, and are circulated as a circulation effect.

As described above, according to this embodiment, when a large amount of air is required, the exhaust air passage surface 1 of the two heat exchangers 8, 8
3a, 13a and the air supply air passage surfaces 13b, 13b, each heat exchanger 8, 8 can be small, and the simultaneous supply/exhaust function without ordinary heat exchange and circulation function can be solved. Even when performing this, there is no need to newly provide a space or a circulator for simultaneous supply and discharge, and therefore the height of the main body 1 can be reduced without increasing its size.

Effects of the Invention As is clear from the description of the embodiments above, according to the present invention, the first and third dampers are opened, and the second and fourth dampers are opened.
When the damper is closed and the heat exchange function is activated, 2
By dividing the exhaust air flow and the supply air flow into separate heat exchangers, even if the size of each heat exchanger is small, the total air path area can be increased, so a large air volume is required. However, the height of the main body will be lower than before. In addition, when all the dampers are opened to perform the normal ventilation function, an extra space for normal ventilation is required as in the past, but it is now sufficient to just provide the dampers. Furthermore, when all the dampers are closed to provide a circulation function, a new circulator is required in the past, but a sufficient circulation function can be obtained by simply providing the dampers. Therefore, even if it has a heat exchange ventilation function, normal ventilation function, and circulation function, the height of the space behind the ceiling is low, the floor height of the building can be lowered, and it is necessary to create a new space for normal ventilation and install a circulator. Since there is no need for space for use, construction work on buildings can be advantageous.

[Brief explanation of drawings]

Fig. 1 is a partially cutaway perspective view of an air conditioning ventilation fan for a duct according to an embodiment of the present invention, showing the state of the heat exchange ventilation function; Fig. 2 is a perspective view of this heat exchanger; and Fig. 3 is a perspective view of the air conditioning fan for the duct. FIG. 4 is a perspective view showing the normal ventilation function state of the ventilation fan, FIG. 4 is a perspective view showing the circulation function state of the duct air conditioning ventilation fan, and FIG. 5 is a partially cutaway perspective view of the conventional duct air conditioning ventilation fan. . 1...Body, 2...Indoor suction port, 3...Indoor discharge port, 4...Outdoor suction port, 5...Outdoor discharge port, 6...Blower for air supply, 7...For exhaust Blower, 8... Heat exchanger, 13a... Exhaust air road surface, 1
3b... Air supply air road surface, 14... Ridgeline, 16... First space, 17... Body exhaust passage, 19... Second space, 20... Body air supply passage, 21... Partition wall , 22...first exit side space part, 23...first damper, 25...second damper, 26...third damper, 27...fourth damper.

Claims (1)

[Scope of Claims] 1. The main body is provided with an indoor suction port and an indoor discharge port that communicate with the room, and an outdoor suction port and an outdoor discharge port that communicate with the outdoors, and the main body has a rectangular prism shape and a single ridge line. A plurality of heat exchangers are arranged in parallel so as to be in contact with each other, and a first space serving as an independent air passage is formed between the exhaust air duct surfaces of each of the heat exchangers, and also an independent air passage is formed between the supply air duct surfaces. A second space is formed as an air passage, and a supply air blower is provided in the air passage connected to the indoor outlet in the main body, and an exhaust air blower is provided in the air passage connected to the outdoor outlet. A blower is provided, and independent dampers are provided at both ends of each of the first and second spaces to open and close the first and second spaces, and by selectively opening and closing each of the dampers, air is removed from the indoor suction port. A first space section, an air path leading to the outdoor outlet through the heat exchanger, and a second space section, an air path leading from the outdoor air intake port to the indoor outlet through the heat exchanger (heat exchange air path) , an air path from the indoor side inlet to the outdoor outlet via the first space, and an air path from the outdoor side inlet to the second space.
An air path (ventilation air path) leading from the indoor air inlet to the indoor air outlet through the space of ), an air conditioning ventilation fan for a duct configured to switch between