JP5791561B2 - Heat exchange ventilator - Google Patents

Description

  The present invention relates to a heat exchange ventilator that performs heat exchange between supply and exhaust in parallel with ventilation by supply and exhaust.

This type of conventional heat exchange ventilator has an outdoor air inlet, an indoor outlet, and a supply air passage provided with air supply blades (blowers), an indoor inlet, an outdoor outlet, and an exhaust. An exhaust air passage provided with blades (blowers) and a heat exchange element are arranged in the main body. During air-conditioning ventilation fan operation, heat exchange is performed between the outside air sucked into the main body from the outdoor suction port by the air supply blade and the indoor air sucked into the main body from the indoor suction port by the exhaust blade. By performing this, heat exchange between supply and exhaust can be performed in parallel with ventilation by supply and exhaust.
In such a case, when the operation is stopped, in conjunction with the switch, the outdoor suction port of the supply air passage and the outdoor discharge port of the exhaust air passage are closed by a shutter, and the exhaust air passage and the supply air passage are connected. Some have been designed to cut off the outside air and prevent the outside air from entering. Then, the indoor discharge damper and the indoor suction damper are opened while the shutter is closed, and the exhaust air and the supply air blade are rotated by the motor to heat the indoor air sucked from the indoor circulation inlet. It can be made to function as a circulator by discharging from the discharge port for indoor circulation through the exchange element. Moreover, the room air sucked from the indoor side suction port of the main body is also discharged into the room from the circulation discharge port through the heat exchange element (see, for example, Patent Document 1).

Japanese Patent Laid-Open No. 60-014030 (FIG. 3)

  The conventional heat exchange ventilator can reduce the temperature drop due to the outside air by stopping the heat exchange ventilation when the operation is stopped or during the indoor circulation operation, and blocking the entrance of the outside wind by the shutter. However, during this indoor circulation operation, the indoor air cannot be ventilated with the outside air. According to the revised Building Standards Law, 24-hour ventilation (more than 0.5 ventilation / hr in living rooms) is obligatory. For this reason, a technique for ventilating with the outside air while reducing the temperature drop during the indoor circulation operation is required.

  The present invention has been made to solve the above-described problems, and an object of the present invention is to allow ventilation while reducing a decrease in indoor temperature during indoor circulation operation.

A heat exchange ventilator according to the present invention includes an air supply air passage provided with an outdoor air inlet, an indoor air outlet, and an air supply fan, a first indoor air inlet, an outdoor air outlet, and an exhaust fan. An exhaust air passage provided with a heat exchanger and a heat exchanger are disposed in the housing, and the first indoor side is provided by outside air sucked into the housing from the outdoor suction port by the air supply blower and the exhaust air blower. In the heat exchange ventilator for exchanging heat with the indoor air sucked into the housing from the suction port, a second indoor suction port is newly provided, and the second indoor suction port and a between the heat exchanger and the outdoor side suction port in the supply air flow path, and between the said heat exchanger and said first chamber side inlet in the exhaust air path, the switchable respectively Connected.

In the heat exchange ventilator according to the present invention, the second indoor side intake port is provided between the heat exchanger and the outdoor side intake port in the supply air passage, and the heat exchanger and the first indoor side in the exhaust air passage. and between the inlet, since the connection can be switched respectively, Ki out to incorporate indoor air (warm air) to the second supply air passage from the indoor-side suction opening, a second indoor-side suction opening It is possible to mix the room air (warm air) taken into the air supply air passage and the outside air (cold air) taken from the outdoor suction port. And the air-fuel mixture whose temperature drop is reduced by this mixing can be further heat-exchanged with the indoor air taken in from the indoor suction port by the heat exchanger, and supplied to the room. The exhaust side path exhausts indoor air to the outside as in normal operation. This makes it possible to switch between ventilation operation, indoor circulation operation, and normal ventilation operation, and reduces the supply air temperature drop into the room, while also reducing the first-class ventilation (ventilation that is forced by mechanical ventilation for both supply and exhaust) Method). That is, it is possible to ventilate while reducing a decrease in the room temperature during the ventilation operation or the indoor circulation operation in winter.

It is an air path simplification figure which shows the ventilation state at the time of the normal ventilation driving | operation of the heat exchange ventilator which concerns on embodiment of this invention. It is an air path simplification figure showing the ventilation state at the time of temperature fall reduction operation of the heat exchange ventilator concerning the embodiment of the present invention. It is an air path simplification figure showing the ventilation state at the time of rapid exhaust operation of the heat exchange ventilator concerning the embodiment of the present invention.

FIG. 1 is a simplified air path diagram showing a ventilation state during normal ventilation operation of the heat exchange ventilator according to the embodiment of the present invention. FIG. 2 is a simplified air passage diagram showing a ventilation state during a temperature drop reduction operation of the heat exchange ventilator according to the embodiment of the present invention. FIG. 3 is a simplified air path diagram showing the ventilation state during the rapid exhaust operation of the heat exchange ventilator according to the embodiment of the present invention.
The heat exchange ventilator according to the embodiment of the present invention includes an outdoor suction port 17 for taking outside air into the room as shown in FIGS. 1 to 3, and an outdoor discharge port 18 for discharging room air to the outside. The first indoor-side suction port 19 for discharging indoor air in the toilet, washroom, and bathroom to the outside, and the indoor-side discharge port 20 for taking outside air into the room.

In FIG. 3, (Ein → Eout) indicated by a solid line arrow indicates the flow of air in the supply air passage 31 that communicates the outdoor suction port 17 and the indoor discharge port 20.
Further, (Fin → Fout) indicated by a broken-line arrow in FIG. 3 indicates the flow of air in the exhaust air passage 32 that communicates the first indoor suction port 19 and the outdoor discharge port 18.

  A heat exchanger 30 is installed at the intersection of the supply air passage 31 and the exhaust air passage 32. In addition, on the upstream side of the heat exchanger 30 in the supply air passage 31, the outside air sucked into the housing from the outdoor suction port 17, or the mixture of the outside air and the indoor air sucked from the second indoor suction port described later. An air cleaning filter 25 is provided to clean the air.

  An intake vane 29 driven by an air supply motor 28 is installed in the supply air passage 31, and an exhaust vane driven by an exhaust motor 26 in the exhaust air passage 32. 27 is installed.

  Moreover, the 2nd indoor side inlet 21 which leads to a living room is newly provided. The second indoor-side intake port 21 is configured by the same pipe extending over the supply air passage 31 and the exhaust air passage 32, and is between the heat exchanger 30 and the outdoor intake port 17 in the supply air passage 31. The exhaust air passage 32 is connected between the heat exchanger 30 and the first indoor side suction port 19.

  In addition, an electric shutter 22 whose opening area can be adjusted is installed at a connection portion of the piping constituting the second indoor side suction port 21 with the air supply air passage 31. Furthermore, an electric shutter 23 whose opening area can be adjusted is also installed at a connection portion of the pipe constituting the second indoor side suction port 21 with the exhaust air passage 32. An electric shutter 24 capable of arbitrarily adjusting the opening area is also installed in the outdoor suction port 17. Further, reference numeral 35 in FIG. 2 indicates a mixing portion of the indoor air taken in from the second indoor side suction port 21 and the outside air taken in from the outdoor side suction port 17 in the supply air passage 31.

In FIG. 1, (G1 → Fout) indicated by a broken-line arrow indicates the flow of air in the exhaust air passage 33 communicating with the exhaust air passage 32 from the second indoor side suction port 21.
In FIG. 2, (G2 → Eout) indicated by a broken-line arrow indicates the air flow in the supply air passage 34 communicating with the supply air passage 31 from the second indoor intake port 21.

Next, the operation of the heat exchange ventilator according to the embodiment of the present invention will be described with reference to FIGS.
First, normal ventilation operation (first type ventilation) will be described. In the normal ventilation operation, as shown in FIG. 1, the electric shutter 23 for exhaust of the exhaust air passage 33 is opened, the electric shutter 22 for air supply of the air supply passage 34 (see FIG. 2) is closed, and the outdoor suction port The 17 electric shutters 24 are opened. As a result, the air supply path becomes the air supply air path 31 (Ein → Eout), and the outside air taken in from the outdoor-side suction port 17 is cleaned by the air cleaning filter 25 and is supplied between the supply and exhaust by the heat exchanger 30. The temperature is exchanged and supplied to the room from the indoor outlet 20.
On the other hand, the exhaust path becomes the exhaust air path 32 (Fin → Fout) and the exhaust air path 33 (G1 → Fout), and the room air in the toilet, the washroom, and the bathroom taken in from the first indoor side intake port 19, The air in the living room taken in from the two indoor side suction ports 21 merges, the temperature is exchanged between supply and exhaust in the heat exchanger 30, and is discharged from the outdoor discharge port 18 to the outside.

Next, the indoor temperature drop reduction ventilation operation (first type ventilation) which is the indoor circulation operation will be described. In the indoor temperature reduction reducing ventilation operation, as shown in FIG. 2, the exhaust electric shutter 23 in the exhaust air passage 33 (see FIG. 1) is closed and the air supply electric shutter 22 in the air supply air passage 34 is opened. In addition, the electric shutter 24 of the outdoor suction port 17 partially blocks the opening area of the outdoor suction port 17. As a result, the air supply path becomes the air supply air path 31 (Ein → Eout) and the air supply air path 34 (G2 → Eout), and the outside air (cold air) taken in from the outdoor air inlet 17 is the second indoor air intake. The air in the room (warm air) taken in from the mouth 21 is mixed in the mixing unit 35, and the temperature is raised. Then, the air-fuel mixture whose temperature has been increased is cleaned by the air purifying filter 25, further increased in temperature by the heat exchanger 30 by exchanging the temperature between the supply and exhaust, and supplied to the room from the indoor outlet 20. The
On the other hand, the exhaust path is an exhaust path 32 (Fin → Fout), and the indoor air in the toilet, the washroom, and the bathroom taken in from the first indoor-side suction port 19 is heated between the supply and exhaust by the heat exchanger 30. It is exchanged and discharged from the outdoor discharge port 18 to the outside.

Next, the rapid exhaust ventilation operation (first type ventilation) will be described. The rapid exhaust ventilation operation is performed when rapid (local) ventilation is necessary, for example, immediately after using a toilet, and an electric shutter for exhausting the exhaust air passage 33 (see FIG. 1) as shown in FIG. 23 and the air supply air passage 34 (see FIG. 2) are closed, and the electric shutter 24 of the outdoor suction port 17 is opened. As a result, the air supply path becomes the air supply air path 31 (Ein → Eout), and the outside air taken in from the outdoor-side suction port 17 is cleaned by the air cleaning filter 25 and is supplied between the supply and exhaust by the heat exchanger 30. The temperature is exchanged and supplied to the room from the indoor outlet 20.
On the other hand, the exhaust path is an exhaust path 32 (Fin → Fout), and the room air in the toilet, washroom, and bathroom taken in from the first indoor side suction port 19 is exchanged in temperature between the supply and exhaust in the heat exchanger 30. Then, it is discharged from the outdoor discharge port 18 to the outside of the room. As a result, the air volume increases and rapid exhaust operation becomes possible.

  In addition, the switch of each ventilation operation may be performed by the user by providing a switch that can be arbitrarily switched to each ventilation operation, or the outdoor temperature and the indoor temperature are detected by a temperature sensor, and in winter and outdoor A method may be adopted in which the operation is automatically switched when the temperature is lower than the room temperature by a certain temperature or more and the outside air temperature becomes a certain temperature or less.

  As described above, according to the heat exchange ventilator according to the embodiment of the present invention, the supply air temperature is increased by mixing the outside air (cold air) with the room air (warm air) in the winter ventilation operation or the indoor circulation operation. After that, the temperature can be further increased (temperature exchange) by the heat exchanger, so that a decrease in the room temperature can be reduced while taking in the outside air.

  Moreover, according to the heat exchange ventilator which concerns on embodiment of this invention, since the 2nd indoor side inlet 21 to the supply air path 31 side and the exhaust air path 32 side is comprised by the same piping, ventilation It becomes possible to reduce the piping members of the operation equipment.

  Moreover, according to the heat exchange ventilator which concerns on embodiment of this invention, the connection part with the supply air path 31 of the piping which comprises the 2nd indoor side suction inlet 21, and the connection with the exhaust air path 32 of this piping Since the electric shutters 22 and 23 each having an adjustable opening area are installed in the section, it is possible to switch between a ventilation operation in winter and an indoor circulation operation and a normal ventilation operation.

  Moreover, according to the heat exchange ventilator which concerns on embodiment of this invention, since the piping which comprises the 2nd indoor side inlet 21 is comprised so that it may lead to a living room, it is the cause of an odor at the time of ventilation operation. It is possible to prevent troubles related to odors without returning the air in the toilet, washroom, and bathroom.

  Further, according to the heat exchange ventilator according to the embodiment of the present invention, since the shutter 24 capable of adjusting the opening area is installed at the outdoor air inlet 17 of the supply air passage 31, the ventilation operation and the indoor circulation operation in the winter season are provided. Sometimes, the air volume of the outside air (cold air) mixed with the room air (warm air) can be adjusted, and the mixing temperature can be adjusted.

  Moreover, according to the heat exchange ventilator which concerns on embodiment of this invention, the external air suck | inhaled in the housing | casing from the outdoor side inlet 31 in the upstream of the heat exchanger 30 in the supply air path 31, or this outdoor air and 2nd Since the air purifying filter 25 for purifying the air-fuel mixture with the indoor air sucked from the indoor air inlet 21 is provided, the indoor air can be cleaned and taken into the room by the air purifying filter 25, and the indoor air is purified. can do.

  17 Outdoor Outlet, 18 Outdoor Outlet, 19 First Indoor Inlet, 20 Indoor Outlet, 21 Second Indoor Inlet, 22, 23, 24 Electric Shutter (Shutter), 25 Air Clean filter (filter), 26 Exhaust motor, 27 Exhaust vane, 28 Supply motor, 29 Intake vane, 30 Heat exchanger, 31, 34 Supply air channel, 32, 33 Exhaust air channel, 35 Outside air and indoor Mixing part with air.

Claims (6)

Heat exchange with an air supply passage provided with an outdoor suction port, an indoor discharge port, and an air supply blower, and an exhaust air passage provided with a first indoor side suction port, an outdoor discharge port, and an exhaust blower And a room that is sucked into the housing from the first indoor suction port by the exhaust air blower and outside air sucked into the housing by the air supply fan. In a heat exchange ventilator that exchanges heat with air by the heat exchanger,
A second indoor inlet is newly provided, and the second indoor inlet is provided between the heat exchanger in the supply air passage and the outdoor inlet, and the heat exchange in the exhaust air passage. The heat exchange ventilator is characterized in that it is switchably connected between the chamber and the first indoor-side suction port.   2. The heat exchange ventilator according to claim 1, wherein the second indoor-side suction port is configured by the same pipe extending over the supply air passage and the exhaust air passage.   A shutter capable of adjusting an opening area is installed at a connection portion of the pipe constituting the second indoor side suction port with the supply air passage and a connection portion of the pipe with the exhaust air passage. The heat exchange ventilator according to claim 2, wherein   The heat exchange ventilator according to claim 2 or 3, wherein the second indoor side suction port communicates with a living room.   The heat exchange ventilator according to any one of claims 1 to 4, wherein a shutter capable of adjusting an opening area is installed at an outdoor air inlet of the supply air passage.   On the upstream side of the heat exchanger in the air supply air passage, outside air sucked into the casing from the outdoor suction port, or a mixture of the outside air and indoor air sucked from the second indoor suction port The heat exchange ventilator according to any one of claims 1 to 5, wherein a filter for cleaning is provided.

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