Detailed Description
A heat exchange ventilator according to one embodiment of the present invention includes an outside air inlet, an outside air supply port, an indoor air inlet, an indoor air outlet, an air supply path, an exhaust path, and a heat exchange element. The outside air suction port sucks outside air into the main body. The outside air supply port supplies the outside air sucked into the main body into the room. The indoor air suction inlet sucks indoor air into the main body. The indoor air discharge port discharges indoor air sucked into the main body to the outside. The air supply path conveys outside air sucked in from the outside air suction port to the outside air supply port. The exhaust path conveys indoor air sucked in from the indoor air suction port to the indoor air discharge port. The heat exchange element is disposed at a position where the air supply path and the air discharge path intersect, and exchanges heat between indoor air and outdoor air. Further, a heat exchange ventilator according to an aspect of the present invention includes an indoor air circulation port, a circulation path, a filter, an exhaust damper, a circulation damper, and a control unit. The indoor air circulation port supplies indoor air sucked into the main body from the indoor air suction port to the room again. The circulation path conveys indoor air sucked from the indoor air suction port to the indoor air circulation port. The filter is disposed on the circulation path. The exhaust damper opens and closes the exhaust path. The circulation damper opens and closes the circulation path. The control unit controls the opening and closing of the exhaust damper and the circulation damper, and switches between a 1 st state in which the exhaust path open/circulation path is closed and a 2 nd state in which the exhaust path closed/circulation path is open.
This makes it possible to clean the air sucked into the room of the main body through the indoor air suction port and return the air to the room through the indoor air circulation port. Therefore, the indoor air can be purified without causing dew condensation in the main body.
In a specific aspect of the heat exchange type ventilator according to one aspect of the present invention, a suction damper for opening and closing the external air suction port is provided, and the control unit controls the suction damper so that the suction damper is closed in the 2 nd state.
This prevents the air from entering the main body when the outside air is at a low temperature or contaminated. Thus, the occurrence of dew condensation and the contamination of the heat exchange element can be prevented, and as a result, the deterioration of the indoor air quality can be prevented.
In another specific aspect of the heat exchange ventilator according to one aspect of the present invention, the ventilator includes a suction damper that opens and closes the external air suction port, and the controller controls the suction damper to be opened in the 2 nd state.
Accordingly, when the outside air is low in temperature and fresh, such air can be sucked into the main body, so that fresh air can be supplied into the room, and an increase in the carbon dioxide concentration in the room can be suppressed.
In another specific aspect of the heat exchange type ventilator according to one aspect of the present invention, the exhaust damper and the circulation damper are formed integrally as one integrated damper, and the opening and closing of the exhaust damper and the opening and closing of the circulation damper are reversed by the integrated damper.
This makes it possible to switch between the heat exchange ventilation operation using the exhaust path and the circulation operation using the circulation path only by the integrated damper, and also to reduce the number of dampers, thereby achieving the effect of reducing the cost.
Embodiments of the present invention will be described below with reference to the drawings.
(embodiment mode)
A heat exchange ventilator according to an embodiment of the present invention will be described with reference to the drawings.
As shown in fig. 1, a heat exchange ventilator 1 according to an embodiment of the present invention is box-shaped, and an indoor air suction port 5 and an indoor air circulation port 6 are provided in a front panel 14 constituting an upper surface of the heat exchange ventilator 1. The indoor air intake port 5 draws indoor air into the main body of the heat exchange type ventilator 1. The indoor air circulation port 6 supplies indoor air sucked into the main body of the heat exchange type ventilator 1 from the indoor air suction port 5 into the room.
Further, an outside air intake port 2 and an indoor air discharge port 3 are provided on one side surface of the heat exchange type ventilator 1, and an outside air supply port 4 is provided on the other side surface opposite to the one side surface. The outside air suction port 2 sucks outside air into the main body of the heat exchange type ventilator 1. The indoor air discharge port 3 discharges indoor air sucked into the main body of the heat exchange type ventilator 1 to the outside. The outside air supply port 4 supplies the outside air sucked into the main body of the heat exchange ventilator 1 into the room.
As shown in fig. 2, the heat exchange type ventilation apparatus 1 includes an air supply path 7 (indicated by solid arrows) and an air discharge path 8 (indicated by broken arrows). The air supply path 7 delivers the outside air sucked in from the outside air suction port 2 to the outside air supply port 4. The exhaust path 8 conveys the indoor air sucked from the indoor air suction port 5 to the indoor air discharge port 3 (see fig. 1).
A heat exchange element 12 having a heat recovery function for exchanging heat between indoor air and outdoor air is disposed at a position where the air supply path 7 and the air discharge path 8 intersect in the main body of the heat exchange ventilator 1.
In the air supply path 7, fresh outside air sucked from the outside air suction port 2 is supplied from the outside air supply port 4 to the room through the heat exchange element 12. On the other hand, as shown in fig. 3, in the exhaust path 8, the contaminated air in the room sucked in through the indoor air suction port 5 passes through the heat exchange element 12 (see fig. 2) and is discharged to the outside through the indoor air discharge port 3. At this time, the heat exchange element 12 supplies heat of the discharged air to the supplied air, and supplies heat of the supplied air to the discharged air.
As shown in fig. 2, fresh outside air sucked from the outside air suction port 2 is sent through the air supply path 7 by operating the air supply fan 9. The contaminated air in the room sucked through the indoor air suction port 5 is sent through the exhaust path 8 by operating the exhaust fan 10. The air supply fan 9 and the air exhaust fan 10 are coupled to a motor 11 fixed to a motor fixing plate 15 via the same shaft. The air supply fan 9 and the air exhaust fan 10 are not necessarily connected to the motor 11 by the same shaft.
The outside air inlet 2, the indoor air outlet 3, and the outside air supply port 4 are each formed in a shape to which a duct (not shown) can be connected. The duct connected to the outside air intake port 2 and the indoor air discharge port 3 is drawn around the outer wall surface of the building to discharge indoor air to the outside. The duct connected to the outside air supply port 4 is drawn around the ceiling surface or the wall surface of the living room, and supplies outside air to the room.
As shown in fig. 7, the heat exchange ventilator 1 further includes a circulation path 21. The circulation path 21 conveys indoor air sucked in from the indoor air suction port 5 to the indoor air circulation port 6. In the circulation path 21, the contaminated air in the room sucked in from the indoor air suction port 5 is purified by a filter 16 (see fig. 2) described later, and then discharged to the outside of the room from the indoor air discharge port 3 through the heat exchange element 12 (see fig. 2).
As shown in fig. 4, an inner case 13 is disposed in the main body of the heat exchange ventilator 1. The inner case 13 has a filter 16 (see fig. 2), and an indoor air blowoff port 17 is provided in a part of the inner case 13. The filter 16 and the indoor air blowoff port 17 are disposed in the circulation path 21.
A control unit (not shown) provided inside or outside the heat exchange ventilator 1 switches between a 1 st state in which the circulation path 21 of the exhaust path 8 is open and a 2 nd state in which the circulation path 21 of the exhaust path 8 is closed.
Specifically, as shown in fig. 5, a suction damper 19 is provided in the outside air inlet 2, and the opening and closing of the suction damper 19 is controlled by the control unit, whereby the outside air inlet 2 is opened and closed and the air supply passage 7 is opened and closed. Further, an exhaust damper 20 is provided in the indoor air outlet 3, and the opening and closing of the exhaust damper 20 is controlled by the control unit, whereby the indoor air outlet 3 is opened and closed and the exhaust path 8 is opened and closed. Further, the inner case 13 is provided with a circulation damper 18, and the opening and closing of the circulation damper 18 are controlled by the control unit, whereby the indoor air blowoff port 17 is opened and closed and the circulation path 21 is opened and closed.
The indoor air outlet 3 is opened and closed by the control unit to set the indoor air blowoff port 17 to the 1 st state, whereby the heat exchange ventilation operation can be performed. In the heat exchange ventilation operation, the indoor air taken into the main body of the heat exchange ventilator 1 through the indoor air inlet 5 is heat exchanged with the outside air, and is discharged through the indoor air outlet 3.
Further, the indoor air outlet 3 is closed and the indoor air re-blowing outlet 17 is opened by the control unit to set the 2 nd state, thereby enabling the circulation operation. In the circulation operation, the indoor air sucked into the main body of the heat exchange type ventilator 1 through the indoor air suction port 5 is purified by the filter 16, and then is supplied again into the room through the indoor air re-blowing port 17. These operations can exhibit an effect of purifying air in a polluted room.
Fig. 6 shows a heat exchange ventilation operation in which the indoor air sucked into the main body of the heat exchange ventilator 1 through the indoor air suction port 5 flows through the exhaust path 8.
By operating the control unit, the indoor air outlet 3 is opened by the exhaust damper 20 (see fig. 5), and the indoor air blowback port 17 (see fig. 7) is closed by the circulation damper 18. As a result, the indoor air sucked into the main body of the heat exchange type ventilator 1 through the indoor air suction port 5 is purified by passing through the filter 16 (see fig. 2), and then is heat-exchanged with the outside air by passing through the heat exchange element 12.
Then, the heat-exchanged indoor air is discharged to the outside of the room from the indoor air outlet 3 by the exhaust fan 10. This makes it possible to achieve the effect of discharging contaminated air in the room to the outside and reducing the carbon dioxide concentration in the room.
Fig. 7 shows a circulation operation in which indoor air sucked into the main body of the heat exchange ventilator 1 through the indoor air suction port 5 flows through the circulation path 21.
By operating the control unit, the indoor air outlet 3 is closed by the exhaust damper 20 (see fig. 5), and the indoor air re-blow-out port 17 is opened by the circulation damper 18. As a result, the indoor air sucked into the main body of the heat exchange ventilator 1 through the indoor air suction port 5 is purified by the filter 16 (see fig. 2), and then is heat-exchanged with the outside air by the heat exchange element 12.
After that, the heat-exchanged indoor air passes through the exhaust fan 10 and the indoor air re-blowing port 17, and is supplied again into the room through the indoor air circulation port 6. Thus, the indoor air is purified by the filter 16 and then supplied from the indoor air circulation port 6 again, and therefore, the effect of purifying the indoor air can be exhibited.
The intake damper 19 (see fig. 5) will be described in detail. In a state where the indoor air outlet 3 is closed and the indoor air outlet 17 is opened to perform the circulation operation, the outside air inlet 2 (see fig. 5) is closed by the control unit, whereby the outside air can be prevented from entering the main body of the heat exchange type ventilator 1. This prevents low-temperature air from flowing through the main body of the heat exchange ventilator 1, and thus the effect of suppressing the occurrence of condensation can be exhibited. Further, when the outside air is polluted, the polluted air can be prevented from flowing in the main body of the heat exchange type ventilator 1, and the effect of prolonging the life of the heat exchange element 12 and the effect of preventing the polluted air from being supplied to the room can be exerted.
On the other hand, in the state where the circulation operation is performed, the outside air suction port 2 is opened by the control unit, so that the outside air can be sucked into the main body of the heat exchange type ventilator 1. This makes it possible to supply outdoor fresh air sucked from the outdoor air suction port 2 into the room through the outdoor air supply port 4, and further exhibit the effect of reducing the carbon dioxide concentration in the room.
Fig. 8 and 9 show the exhaust passage 8 and the circulation passage 21 when the exhaust damper 20 and the circulation damper 18 are integrated to obtain one integrated damper 22. The integrated damper 22 is provided in the vicinity of the indoor-air blowoff port 17 of the inner case 13.
The integrated damper 22 is sized to block the indoor air blowoff port 17 and also to block the exhaust path 8 to prevent ventilation of air. By integrating the exhaust damper 20 and the circulation damper 18, the exhaust path 8 is opened and the indoor air blowoff port 17 is closed (the circulation path 21 is closed) during the heat exchange ventilation operation. During the circulation operation, the exhaust path 8 is closed, and the indoor air blowoff port 17 is opened (the circulation path 21 is opened). This makes it possible to switch between the heat exchange ventilation operation and the circulation operation by using only one integrated damper 22, thereby reducing the number of dampers, and thus achieving the effect of cost reduction.
The heat exchange ventilator of the present invention is effective for applications such as a duct-type heat exchange ventilator for exchanging heat between outside air and indoor air, and a duct-type air conditioner.