JP7336630B2 - ventilation system - Google Patents

Description

The present invention relates to ventilation systems for buildings.

Conventionally, this type of ventilation system is installed in the toilet or bathroom of the building, and the ventilation device that can constantly ventilate by continuously exhausting the indoor air, and the main body is installed in the space above the ceiling of the building. 2. Description of the Related Art A heat exchange ventilator is known that exchanges heat between air and outdoor air, and simultaneously supplies air to the room and exhausts air to the outside.

Furthermore, the heat exchange type ventilation system is equipped with separate motors for driving the supply air blower that supplies air to the room and the exhaust air blower that exhausts air to the outside. It is known to stop a driving motor of an exhaust fan based on an arbitrarily set humidity condition (for example, Patent Document 1).

Japanese Patent Application Laid-Open No. 2013-195008

In such a conventional ventilation system, the power consumption of the ventilation system is reduced by, for example, stopping the drive motor of the exhaust fan of the heat exchange type ventilator under temperature and humidity conditions that do not require much heat exchange. do. However, when the exhaust air blower of the heat exchange type ventilation system is stopped, the heat exchanger operation is stopped, and the temperature and humidity of the outdoor air flows into the room as it is, so there is a problem that the user may feel uncomfortable. there were.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to provide a ventilation system that supplies comfortable air to a room while reducing power consumption.

In order to achieve this object, the ventilation system according to one aspect of the present invention includes a first ventilation device including a supply air blower, an exhaust air blower, and a heat exchanger; a second ventilator that exhausts the air, an indoor supply air temperature sensor that detects the temperature of the air blown out from the indoor outlet of the first ventilator, and an indoor air inlet of the first ventilator an indoor exhaust temperature sensor that detects the temperature of the air sucked from the indoor exhaust humidity sensor that detects the humidity of the air sucked from the indoor air inlet of the first ventilation device; and the first ventilation device a controller for controlling operation, wherein the air supply blower includes an air supply motor and an air supply fan; the exhaust air blower includes an exhaust motor and an exhaust fan; The exchanger exchanges heat between the air supplied to the room and the air discharged to the outside, and when the second ventilator performs the exhaust operation, the first ventilator is for the exhaust. The exhaust operation is continued while reducing the number of revolutions of the motor, and the controller controls that the indoor dew point temperature calculated from the detection results of the indoor exhaust temperature sensor and the indoor exhaust humidity sensor is equal to the indoor supply air. The ventilation system increases the rotation speed of the exhaust motor within a range below the rotation speed before the second ventilator starts operating when the supply air temperature detected by the temperature sensor is higher than or equal to the supply air temperature detected by the temperature sensor. , to achieve the intended purpose.

ADVANTAGE OF THE INVENTION According to this invention, the ventilation system which supplies comfortable air indoors can be provided, reducing power consumption.

1 is a perspective view of a heat exchange ventilator according to Embodiment 1 of the present invention; Cross-sectional view of the same heat exchange type ventilation system Block diagram showing the configuration of the same heat exchange type ventilation system Sectional view of the same bathroom ventilation dryer Block diagram showing the configuration of the bathroom ventilation dryer Schematic diagram of a house equipped with a ventilation system according to Embodiment 1 of the present invention Flowchart showing the control method of the system Flowchart showing the control method of the system Flowchart showing the control method of the system Schematic diagram of a house equipped with a ventilation system according to Embodiment 2 of the present invention Sectional view of the cooker hood according to Embodiment 3 of the present invention FIG. 11 is a block diagram showing the configuration of the ventilation system according to Embodiment 3 of the present invention (when the first controller receives the signal from the third controller); Flowchart showing the control method of the same ventilation system Flowchart showing the control method of the same ventilation system Flowchart showing the control method of the same ventilation system FIG. 11 is a block diagram showing the configuration of a ventilation system according to Embodiment 4 of the present invention (when the third controller receives the signal from the first controller); Flowchart showing the control method of the same ventilation system Block diagram showing the configuration of the same ventilation system (when the fourth control unit receives signals bidirectionally with the first control unit and the third control unit)

A ventilation system according to an aspect of the present invention includes a first ventilation device including a supply air blower, an exhaust air blower, and a heat exchanger; a second ventilation device for exhausting air in a bathroom; The air supply blower includes an air supply motor and an air supply fan, the exhaust air blower includes an exhaust motor and an exhaust fan, and the heat exchanger includes air supplied to the room When the second ventilator performs the exhaust operation, the first ventilator continues the exhaust operation while decreasing the rotation speed of the exhaust motor.

According to such a configuration, the exhaust operation by the second ventilator is continued, and a small amount of heat is exchanged between the exhausted air and the drawn outside air. As a result, a small amount of heat-exchanged outside air is supplied to the interior of the room, so comfortable air can be supplied to the interior of the room. In addition, power consumption of the ventilation system can be reduced by reducing the rotation speed of the exhaust motor.

Further, a control unit for controlling the operation of the first ventilation device may be provided, and the control unit may reduce the rotation speed of the exhaust motor when it determines that heat exchange in the first ventilation device is unnecessary. good.

With such a configuration, it is possible to easily control the rotation speed of the exhaust motor.

In addition, an indoor supply air temperature sensor that detects the temperature of the air blown out from the indoor air outlet of the first ventilation device and a room temperature sensor that detects the temperature of the air sucked in from the indoor air suction port of the first ventilation device An inner exhaust temperature sensor and an indoor exhaust humidity sensor for detecting the humidity of the air sucked from the indoor air suction port of the first ventilation device are provided, and the number of rotations of the exhaust motor is determined by the indoor supply air temperature sensor. The setting may be made based on the detected temperature, the temperature detected by the indoor exhaust temperature sensor, and the humidity detected by the indoor exhaust humidity sensor.

According to such a configuration, it is possible to suppress the occurrence of dew condensation due to the temperature difference between the outdoor air supplied indoors and the indoor air.

Also, the bathroom air sucked by the second ventilation device flows into the first ventilation device, and the heat exchanger is a sensible heat exchange element that recovers heat from the inflowing bathroom air. good too.

According to such a configuration, more comfortable air can be supplied indoors by recovering the heat of the bathroom in the heat exchanger.

In addition, a third ventilator is provided above the cooker to exhaust air, and when the third ventilator performs exhaust operation, the first ventilator reduces the rotation speed of the exhaust motor. may be configured.

According to such a configuration, it is possible to further reduce the power consumption of the ventilation system and prevent the interior of the room from becoming negative pressure.

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
First, the configuration of the heat exchange ventilator will be described with reference to FIGS. 1 and 2. FIG. FIG. 1 is a perspective view of a heat exchange ventilator according to Embodiment 1 of the present invention. FIG. 2 is a cross-sectional view of the heat exchange ventilator according to Embodiment 1 of the present invention.

As shown in FIG. 1, the heat exchange ventilator 1 has a box-shaped main body. An outside air intake port 2, an indoor air exhaust port 3 (indoor air intake port), and an outdoor air supply port 4 (indoor air outlet) are provided, for example, on a side surface of the main body. An indoor air suction port 5 is provided on, for example, the lower surface of the main body. The main body is installed in the ceiling of the room or the like.

The outside air supply port 4 is provided on the side facing the side where the outside air intake port 2 or the indoor air exhaust port 3 is provided.

The external air intake port 2, the indoor air exhaust port 3, and the external air supply port 4 are shaped so that ducts can be connected to them. A duct connected to the outside air inlet 2 and the indoor air outlet 3 is routed to the outer wall surface of the building to communicate with the outdoor air outside the building. The duct connected to the outside air supply port 4 communicates with the ceiling surface or wall surface of the living room and communicates with the indoor air. The indoor air suction port 5 is provided on the surface exposed to the living room and communicates with the living room.

As shown in FIG. 2 , inside the heat exchange type ventilator 1 , a heat exchange element 6 , a first control section 13 , an exhaust air blowing section 17 and an air supply blowing section 18 are provided.

The air supply blower 18 has an air supply fan 9 and an air supply motor 11 . The air supply fan 9 is rotated by an air supply motor 11 . The air supply motor 11 is, for example, a DC motor.

The exhaust air blower 17 has an exhaust fan 10 and an exhaust motor 12 . The exhaust fan 10 is rotated by an exhaust motor 12 . The exhaust motor 12 is, for example, a DC motor.

The operations of the exhaust air blower 17 and the air supply blower 18 are controlled by the first controller 13 . Specifically, the first control unit 13 controls the rotational speeds of the air supply motor 11 and the exhaust motor 12 .

The heat exchange type ventilator 1 has a supply air passage 7 and an exhaust air passage 8 .

In the supply air passage 7, the outdoor air taken into the heat exchange type ventilator 1 undergoes heat exchange with the air that passes through the heat exchange element 6 and is exhausted. After that, the outdoor air is sucked into the air supply fan 9 and supplied into the room from the indoor outlet. That is, the supply air passage 7 draws in fresh outdoor air (supplied air) from the outside air intake port 2, passes through the heat exchange element 6 inside the heat exchange type ventilator 1, and enters the room from the outside air supply port 4. supply route.

The air exhausted in the exhaust air passage 8 is sucked into the main body from the indoor air suction port 5, passes through the heat exchange element 6, exchanges heat with the supplied air, and is sent to the exhaust fan 10. sucked in. The air sucked by the exhaust fan 10 is discharged to the outside from the indoor air exhaust port 3. - 特許庁That is, the exhaust air passage 8 is a path for sucking polluted indoor air (exhaust air) from the indoor air suction port 5, passing through the heat exchange element 6, and exhausting it to the outside from the indoor air exhaust port 3.

The heat exchange element 6 has a heat recovery function of supplying the heat quantity of the exhausted air to the supplied air or supplying the heat quantity of the supplied air to the heat quantity of the exhausted air. there is The heat exchange element 6 is arranged at a position where the supply air passage 7 and the exhaust air passage 8 intersect.

In addition, the heat exchange type ventilator 1 may be provided with a bypass exhaust air passage (not shown). A damper (not shown) may be used to switch between the heat exchange exhaust air path and the bypass exhaust air path, that is, the switching between the exhaust air path passing through the heat exchange element and the exhaust air path not passing through the heat exchange element.

The heat exchange type ventilator 1 also includes an indoor supply air temperature sensor 14 , an indoor exhaust temperature sensor 15 , and an indoor exhaust humidity sensor 16 .

The indoor supply air temperature sensor 14 is provided in the supply air passage 7 and detects the temperature of the air (SA) blown out from the outside air supply port 4 of the heat exchange type ventilator 1 . The indoor-side exhaust temperature sensor 15 is provided in the exhaust air passage 8 and detects the temperature of the air (RA) sucked from the indoor air inlet 5 of the heat exchange type ventilator 1 . The indoor-side exhaust humidity sensor 16 is provided in the exhaust air passage 8 and detects the humidity of the air (RA) sucked from the indoor air suction port 5 of the heat exchange type ventilator 1 .

The indoor-side exhaust temperature sensor 15 and the indoor-side exhaust humidity sensor 16 may be integrated temperature/humidity sensors instead of separate units. Also, the indoor exhaust temperature sensor 15 and the indoor exhaust humidity sensor 16 may be provided in a first operation section 19 which will be described later.

Also, the first control unit 13 may be provided outside the heat exchange ventilator 1 instead of inside.

Next, the configuration of the heat exchange ventilator will be described with reference to FIG. FIG. 3 is a block diagram showing the configuration of the heat exchange ventilator.

The heat exchange ventilator 1 includes a first control section 13 and a first operation section 19 .

The first controller 13 controls the supply air blower 18 and the exhaust air blower 17 . Specifically, the first control unit 13 controls the rotation speed of the air supply motor 11 and the rotation speed of the exhaust motor 12 . Thereby, the first control unit 13 controls the air supply air volume and the exhaust air volume of the heat exchange type ventilator 1 .

The first operation unit 19 is provided, for example, in a living room, and instructs the first control unit 13 to operate at least one of the supply air blower 18 and the exhaust air blower 17 . Temperature information from the indoor supply air temperature sensor 14 , temperature information from the indoor exhaust temperature sensor 15 , and humidity information from the indoor exhaust humidity sensor 16 are input to the first control unit 13 .

Next, a bathroom ventilation dryer according to the ventilation system of the present invention will be described with reference to FIG. FIG. 4 is a cross-sectional view of the bathroom ventilation dryer according to the embodiment of the present invention.

The bathroom ventilation dryer 20 is installed behind the ceiling of the bathroom. The bathroom ventilator/dryer 20 has a circulation fan 25 , a circulation motor 24 , an outside bathroom outlet 23 , a bathroom air inlet 21 , and an inside bathroom outlet 22 .

A ventilation air passage 28 is formed through which the air in the bathroom is blown from the bathroom air inlet 21 to the bathroom outside outlet 23 . When the bathroom ventilation operation is instructed to the bathroom ventilation dryer 20, the circulation fan 25 is operated to suck the air in the bathroom from the bathroom air suction port 21.例文帳に追加The bathroom air drawn into the bathroom ventilator/dryer 20 passes through the bathroom outside air outlet 23 and is exhausted to the outside.

A circulation air passage 27 is formed through which the air in the bathroom is blown from the bathroom air inlet 21 to the bathroom outside air outlet 23 . When the bathroom circulation operation is instructed to the bathroom ventilation dryer 20, the circulation fan 25 is operated to suck the air of the bathroom from the bathroom air suction port 21.例文帳に追加The bathroom air sucked into the bathroom ventilation dryer 20 passes through the bathroom air outlet 22 and is blown out into the bathroom.

Switching between the circulation air passage 27 and the ventilation air passage 28 is performed by the air passage changing means 26 . The air path changing means 26 includes, for example, a stepping motor and an air path changing plate.

The second control unit 29 is provided, for example, on the upper surface of the body of the bathroom ventilator/dryer 20 and controls the operation of at least one of the circulation fan 25 and the air path changing means 26 .

Next, the configuration of the bathroom ventilation dryer will be described with reference to FIG. FIG. 5 is a block diagram showing the configuration of the bathroom ventilation dryer.

The bathroom ventilation dryer 20 includes a second control section 29 and a second operation section 30 . A second control unit 29 controls the operation of the circulation motor 24 or the operation of the air path changing means 26 . Also, the second controller 29 is electrically connected to the first controller 13 . The second operation unit 30 is provided in, for example, a dressing room, and instructs the second control unit 29 to operate at least one of the circulation fan 25 and the air path changing means 26 .

The bathroom ventilator/dryer 20 may have a heating function or a humidifying function.

Next, a ventilation system according to this embodiment will be described with reference to FIG. FIG. 6 is a schematic diagram of a house with a ventilation system.

A ventilation system 100 according to the present embodiment includes a heat exchange type ventilation device 1 and a bathroom ventilation dryer 20 .

The heat exchange type ventilator 1 and the bathroom ventilation dryer 20 are connected via, for example, a relay (not shown).

The heat exchange type ventilator 1 communicates with the outdoors via an air supply side duct 50 . The air supply side duct 50 is connected to the outside air intake port 2 . In addition, the heat exchange type ventilator 1 communicates with the outdoors via the exhaust side duct 51 . The exhaust-side duct 51 is connected to the indoor air exhaust port 3 .

The bathroom ventilation dryer 20 communicates with the outside through a bathroom exhaust duct 52. - 特許庁The bathroom exhaust duct 52 is connected to the outside bathroom outlet 23 .

Next, a method for controlling the ventilation system according to the present invention will be described with reference to FIG. FIG. 7 is a flow chart showing the operation of the ventilation system according to the invention.

First, numerical examples of each constant are described for the air volume shown in FIG. Predetermined air volume A: 110 m ³ /h, first air volume A ₁ : 80 m ³ /h. In other words, it is a value that satisfies the relationship of "predetermined air volume A>first air volume _A1 ".

As shown in FIG. 7, when the exhaust operation of the bathroom ventilation dryer 20 is started (S01), the first control unit 13 controls the exhaust air volume (EA air volume) to change from the predetermined air volume A to the first air volume _A1 . The rotation speed of the exhaust motor 12 is decreased (S02). At this time, the air supply air volume (SA air volume) is not reduced, and remains at the predetermined air volume A (S02). That is, the heat exchange air operation is performed in a state in which the amount of exhaust air from the exhaust air blower 17 is reduced. By continuing the heat exchange exhaust operation with a small amount, heat exchange is performed in the heat exchange type ventilator 1, and the heat-exchanged air is continuously supplied to the room.

Then, when the exhaust operation of the bathroom ventilation dryer 20 is stopped during the heat exchange exhaust operation with the rotation speed of the exhaust motor 12 reduced (S03), the first control unit 13 controls the exhaust air volume to be the first 1 air volume A The number of revolutions of the exhaust motor 12 is increased so as to reach a predetermined air volume A from ₁ (S04). As a result, the exhaust air volume, which had been reduced, is increased to bring it closer to the supply air volume, thereby enabling efficient heat exchange.

Note that the number of rotations of the exhaust motor 12 may be set in consideration of the amount of air exhausted by the bathroom ventilation dryer 20 . Further, if the heat exchange type ventilator 1 is not in operation when the exhaust operation of the bathroom ventilation dryer 20 is started, the operation of the heat exchange type ventilator 1 may be started. At this time, it is preferable that the amount of air exhausted by the exhaust blower 17 is smaller than the amount of air supplied by the air supply blower 18 . By performing the heat exchange air operation, it is possible to supply air after heat exchange into the room and to prevent the room from becoming negative pressure.

Next, the case of setting the number of rotations of the exhaust motor 12 based on the detected temperature and humidity will be described with reference to FIG. FIG. 8 is a flow chart showing the operation of the ventilation system according to the invention.

Here, the temperature at which indoor air condenses is defined as the dew point temperature Td, and the temperature of the supplied air (SA) detected by the indoor supply air temperature sensor 14 is defined as the supplied air temperature (SA temperature) _T1 . Further, regarding the air volume shown in FIG. 8, a numerical example of the constant is the second air volume A ₂ : 90 m ³ /h. In other words, it is a value that satisfies the relationship of "predetermined air volume A>second air volume _A2 >first air volume _A1 ".

When the exhaust operation of the bathroom ventilation dryer 20 is started (S10), the rotation speed of the exhaust motor 12 is decreased so that the exhaust air volume becomes the first air volume _A1 from the predetermined air volume A (S11). At this time, the amount of supplied air is not reduced, and remains at the predetermined amount of air A (S11).

Then, the dew point temperature Td is calculated from the detection results of the indoor exhaust temperature sensor 15 and the indoor exhaust humidity sensor 16 (S12). Also, the supply air temperature _T1 is detected by the room-side supply air temperature sensor 14 (S12). Then, the supply air temperature _T1 and the dew point temperature Td are compared (S13).

When the supply air temperature T ₁ ≤ the dew point temperature Td (Yes in S13), the supply air temperature T ₁ > the dew point temperature _{Td .} The rotation speed of the motor 12 is increased (S15). After that, when the exhaust operation of the bathroom ventilation dryer 20 is stopped (S16), the first control unit 13 adjusts the rotation speed of the exhaust motor 12 so that the exhaust air volume changes from the second air volume _A2 to the predetermined air volume A. Increase (S17).

The heat exchange efficiency is increased by increasing the exhaust air volume, which has been reduced to the first air volume _A1 with respect to the air supply air volume of the predetermined air volume A, to the second air volume _A2 . As a result, the temperature of the air supplied into the room rises. As a result, it is possible to suppress the occurrence of dew condensation due to the temperature difference between the indoor air and the supplied air.

On the other hand, as a result of comparing the supply air temperature _T1 and the dew point temperature Td, if the supply air temperature _T1 > the dew point temperature Td (No in S13), the exhaust air volume remains the first air volume _A1 , that is, the exhaust motor 12 is kept reduced from the predetermined air volume A (S14). At this time, the supplied air volume remains at the predetermined air volume A. After that, when the exhaust operation of the bathroom ventilation dryer 20 is stopped (S16), the first control unit 13 adjusts the rotation speed of the exhaust motor 12 so that the exhaust air volume changes from the first air volume _A1 to the predetermined air volume A. Increase (S17).

The temperature of the supplied air after a certain period of time is assumed to be the supplied air temperature T ₂ and the supplied air temperature T ₃ , and is compared with the dew point temperature Td at regular intervals to control the rotation speed of the exhaust motor 12. There may be.

In addition, when the first control unit 13 determines that heat exchange is not necessary in the middle of spring or autumn or at night in summer, the exhaust amount of the heat exchange ventilator 1 is further increased. It is good also as a structure which reduces.

A control method when heat exchange is unnecessary will be described with reference to FIG. Numerical examples of the respective constants for the air volumes shown in FIG. 9 are the third air volume A ₃ : 120 m ³ /h and the fourth air volume A ₄ : 70 m ³ /h. That is, the values satisfy the relationship of "third air volume _A3 >predetermined air volume A>second air volume _A2 >first air volume _A1 >fourth air volume _A4 ".

When the bathroom exhaust operation is started (S30), the rotation speed of the exhaust motor 12 is decreased so that the exhaust air volume becomes the first air volume _A1 from the predetermined air volume A (S31). At this time, the amount of supplied air is not reduced, and remains at the predetermined amount of air A (S31).

Then, the first control unit 13 determines whether heat exchange is necessary (S32). When it is determined that heat exchange is necessary (Yes in S32), the rotation speed of the air supply motor 11 and the rotation speed of the exhaust motor 12 are maintained (S34). When it is determined that heat exchange is not necessary (No in S32), the rotation speed of the exhaust motor 12 is further reduced so that the exhaust air volume becomes from the first air volume _A1 to the fourth air volume _A4 (S33). At this time, the rotational speed of the air supply motor 11 may be increased so that the amount of supplied air changes from the predetermined amount of air A to the third amount of air _A3 (S33).

Whether or not heat exchange is necessary can be determined using indicators such as "whether the temperature difference between indoors and outdoors is a predetermined value or less" and "whether the temperature of indoors and outdoors is within a predetermined range". It is determined by the first control unit 13 .

Regardless of whether or not heat exchange is necessary, when the bathroom exhaust operation is stopped (S35), the rotation speed of the exhaust motor 12 and the rotation speed of the air supply motor 11 are set so that the air supply air volume and the exhaust air volume become the predetermined air volume A. (S36).

According to this configuration, when heat exchange is required, power consumption can be reduced by further reducing the operation of the exhaust air blowing section 17 of the heat exchange type ventilator 1 . Further, when heat exchange is unnecessary, the air supply amount is increased while the exhaust amount of the heat exchange type ventilator 1 is decreased. As a result, the pressure inside the room is made positive, and the intrusion of dust and the like can be suppressed. And the indoor air can be kept clean.

Note that, when the first control unit 13 determines that heat exchange is unnecessary, the heat exchange type ventilator 1 may be configured to switch to a bypass exhaust air passage that does not pass through the heat exchange element 6 . As a result, unnecessary heat exchange is not performed, so comfortable air can be supplied to the room.

Further, the ventilation system 100 according to the present embodiment may have a configuration in which the heat exchange type ventilation device 1 and the range hood 40 (third ventilation device) are interlocked. As shown in FIG. 6, the range hood 40 is provided above the cooker 41 and exhausts air. The air sucked by the range hood 40 is exhausted to the outside through the range hood exhaust duct 53 .

Here, when comparing the amount of air exhausted by the range hood 40 and the amount of air exhausted by the bathroom ventilation dryer 20, the amount of air exhausted by the range hood 40 is larger. Therefore, when performing the exhaust operation with the range hood 40, the exhaust air volume of the heat exchange type ventilator 1 may be set to be smaller than the fourth air volume _A4 . As a result, the exhaust operation in the heat exchange type ventilator 1 is reduced, so that the power consumption can be further reduced.

Furthermore, when the range hood 40 is performing exhaust operation, the rotation speed of the air supply motor 11 is adjusted so that the air supply air volume of the heat exchange type ventilator 1 is greater _than the third air volume A3. It may be configured to be increased. Accordingly, by increasing the amount of supplied air, it is possible to suppress the negative pressure in the room.

Alternatively, the toilet exhaust duct 64 of the ventilation device (toilet ventilation fan 42) installed in the toilet may join the exhaust side duct 51 connected to the heat exchange type ventilation device 1 (see FIG. 6). . According to this configuration, the air sucked by the toilet ventilation fan 42 passes through the exhaust side duct 51 and is exhausted to the outside. With such a configuration, the exhaust duct and the exhaust port of the toilet ventilation fan 42 and the heat exchange type ventilation device 1 can be shared. This improves workability.

Furthermore, the heat exchange ventilator 1 may be configured to interlock with a HEMS (Home Energy Management System) and other devices. For example, it may cooperate with a ceiling-embedded air purifier or the like.

In addition, the heat exchange type ventilator 1 may detect VOC (Volatile Organic Compounds) and the like to set the air volume of each blower (exhaust air blower 17, supply air blower 18). .

In the present embodiment, each of heat exchange ventilator 1 and bathroom ventilator/dryer 20 has a control unit, but ventilation system 100 as a whole may have a single control unit.

(Embodiment 2)
Parts having the same configuration as in Embodiment 1 are assigned the same reference numerals, and detailed description thereof is omitted.

FIG. 10 is a schematic diagram showing another connection mode of the ventilation system 100 according to the present invention. As shown in FIG. 10 , in the ventilation system 100 a according to Embodiment 2, the heat exchange ventilator 1 and the bathroom ventilation dryer 20 communicate with each other via a connection duct 54 . That is, the bathroom outside air outlet 23 and the outside air intake 2 are communicated so that the bathroom air sucked into the bathroom ventilation dryer 20 flows into the heat exchange type ventilator 1 . At this time, it is preferable to use the heat exchange element 6 as a sensible heat exchange element. As a result, the hot and humid air in the bathroom can be used to provide more comfortable air in the room.

(Embodiment 3)
The interlocking of equipment in the ventilation system composed of the heat exchange type ventilator 1 and the cooker hood 40 will be described in detail as a third embodiment in which the first control unit receives the signal from the third control unit.

Parts having the same configuration as those in Embodiment 1 or 2 are assigned the same reference numerals, and detailed description thereof is omitted.

A range hood 40 (third ventilator) according to the ventilation system of the present invention will be described with reference to FIG.

The range hood 40 is installed above the cooker. The cooker hood 40 has a cooker upper air inlet 55 , an outdoor air outlet 56 , an exhaust motor 57 , an exhaust fan 58 , and a third controller 60 .

A ventilation air passage 59 is formed through which the air above the cooker is blown from the cooker upper air inlet 55 to the outdoor air outlet 56 .

Next, with reference to FIG. 12, the configuration of a ventilation system comprising the heat exchange type ventilation device 1 and the cooker hood 40 will be described using a block diagram. FIG. 12 is a block diagram when the first control unit 13 receives the signal from the third control unit 60. As shown in FIG.

The cooker hood 40 includes a third control section 60 and a third operation section 61 . The third control unit 60 is provided, for example, on the upper right side of the cooker hood 40 and controls the operation of the exhaust motor 57 . Also, the third controller 60 is electrically connected to the first controller 13 . The third operation unit 61 is provided in the kitchen, for example, and instructs the third control unit 60 to operate the exhaust motor 57 . When the range hood 40 is instructed to operate for ventilation, the exhaust fan 58 is activated to suck the air above the cooker through the cooker upper air suction port 55 . The air above the cooker sucked into the cooker hood 40 passes through the outdoor air outlet 56 and is exhausted to the outside.

Next, a method of controlling the ventilation system according to Embodiment 3 of the present invention will be described with reference to FIG. FIG. 13 is a flow chart showing the operation of the ventilation system according to Embodiment 3 of the present invention.

As shown in FIG. 13, when the exhaust operation of the range hood 40 is started (S37), the first control unit 13 rotates the exhaust motor 12 so that the exhaust air volume (EA air volume) becomes the first air volume _A1 . Decrease the rotation speed (S38). At this time, the air supply air volume (SA air volume) is not reduced, and remains at the predetermined air volume A (S38). That is, the heat exchange air operation is performed in a state in which the amount of exhaust air from the exhaust air blower 17 is reduced. By continuing the heat exchange exhaust operation with a small amount, heat exchange is performed in the heat exchange type ventilator 1, and the heat-exchanged air is supplied indoors.

Then, when the exhaust operation of the range hood 40 is stopped during the heat exchange exhaust operation with the rotation speed of the exhaust motor 12 reduced (S39), the first control unit 13 controls the exhaust air volume to be the predetermined air volume A The number of rotations of the exhaust motor 12 is increased so that (S40). As a result, the exhaust air volume, which had been decreased, is increased to bring it closer to the supply air volume, thereby improving the heat exchange efficiency of the heat exchange type ventilator 1 .

Note that the rotation speed of the exhaust motor 12 may be set in consideration of the amount of air exhausted by the cooker hood 40 . Further, if the heat exchange ventilator 1 is not in operation when the exhaust operation of the range hood 40 is started, the operation of the heat exchange ventilator 1 may be started. At this time, it is preferable that the exhaust amount by the exhaust blower 17 is smaller than the air supply amount by the supply air blower. By performing the heat exchange air operation, it is possible to supply air after heat exchange into the room and to prevent the room from becoming negative pressure.

Next, a case where the ventilation system according to Embodiment 3 of the present invention operates with the number of rotations of the exhaust motor 12 set based on the detected temperature and humidity will be described with reference to the flow chart of FIG.

Here, the temperature at which indoor air condenses is defined as the dew point temperature Td, and the temperature of the supplied air (SA) detected by the indoor supply air temperature sensor 14 is defined as the supplied air temperature (SA temperature) _T1 . Further, regarding the air volume shown in FIG. 17, a numerical example of the constant is the second air volume A ₂ : 90 m ³ /h. In other words, it is a value that satisfies the relationship of "predetermined air volume A>second air volume _A2 >first air volume _A1 ".

When the exhaust operation of the range hood 40 is started (S45), the rotation speed of the exhaust motor 12 is decreased so that the exhaust air volume becomes the first air volume _A1 (S46). At this time, the amount of supplied air is not reduced, and remains at the predetermined amount of air A (S46).

Then, the dew point temperature Td is calculated from the detection results of the indoor exhaust temperature sensor 15 and the indoor exhaust humidity sensor 16 (S47). Also, the supply air temperature _T1 is detected by the indoor supply air temperature sensor 14 (S47). Then, the supply air temperature _T1 and the dew point temperature Td are compared (S48).

If the supply air temperature T ₁ ≤ the dew point temperature Td (Yes in S48), the rotation speed of the exhaust motor 12 is adjusted so that the exhaust air volume becomes the second air volume A ₂ in order to satisfy the supply air temperature T ₁ > the dew point temperature Td. Increase (S50). The heat exchange efficiency is increased by increasing the exhaust air volume that has been reduced to the first air volume _A1 with respect to the air supply air volume of the predetermined air volume A. As a result, the temperature of the air supplied into the room rises. As a result, it is possible to suppress the occurrence of dew condensation due to the temperature difference between the indoor air and the supplied air.

On the other hand, as a result of comparing the supply air temperature _T1 and the dew point temperature Td, if the supply air temperature _T1 > the dew point temperature Td (No in S48), the exhaust air volume remains the first air volume _A1 , that is, the exhaust motor The operation is continued while the number of rotations of 12 is decreased (S49).

After that, when the exhaust operation of the range hood 40 is stopped (S51), the first control unit 13 increases the rotation speed of the exhaust motor 12 so that the exhaust air volume becomes the predetermined air volume A (S52).

The temperature of the supplied air after a certain period of time is assumed to be the supplied air temperature _Tn (n is an integer of 2 or more), and is compared with the dew point temperature Td at regular intervals to control the rotation speed of the exhaust motor 12. It may be a configuration.

In addition, when the first control unit 13 determines that heat exchange is not necessary in the middle of spring or autumn or at night in summer, the exhaust amount of the heat exchange ventilator 1 is further increased. It is good also as a structure which reduces.

A control method when heat exchange is unnecessary will be described with reference to FIG. Numerical examples of each constant for the air volume shown in FIG. 15 are the third air volume A ₃ : 120 m ³ /h and the fourth air volume A ₄ : 70 m ³ /h. That is, the values satisfy the relationship of "third air volume _A3 >predetermined air volume A>second air volume _A2 >first air volume _A1 >fourth air volume _A4 ". A predetermined temperature is _TA .

When the operation of the range hood 40 is started (S53), the rotation speed of the exhaust motor 12 is decreased so that the exhaust air volume becomes the first air volume _A1 (S54). At this time, the amount of supplied air is not reduced, and remains at the predetermined amount of air A (S54).

The first control unit 13 then compares the predetermined temperature _TA with the supply air temperature _T1 to determine whether heat exchange is necessary.

If "predetermined temperature T _A ≤ supplied air temperature T ₁ ", it is determined that heat exchange is unnecessary (No in S55). This is because when the outside air temperature is higher than the room temperature, such as in summer, the room temperature rises due to heat exchange, which may lead to an increase in cooling costs. If it is determined that heat exchange is not necessary, the rotation speed of the exhaust motor 12 is further reduced so that the exhaust air volume becomes the fourth air volume _A4 (S56). At this time, the rotational speed of the air supply motor 11 is increased so that the air supply volume becomes the third air volume _A3 (S56).

On the other hand, if it is determined that heat exchange is necessary (Yes in S55), the rotation speed of the air supply motor 11 and the rotation speed of the exhaust motor 12 are maintained (S57).

After that, when the operation of the range hood 40 is stopped (S58), the rotational speed of the exhaust motor 12 and the rotational speed of the air supply motor 11 are set so that the air supply air volume and the exhaust air volume become the predetermined air volume A (S59).

According to this configuration, power consumption can be reduced by reducing the operation of the exhaust air blower 17 of the heat exchange type ventilator 1 . Also, the air supply amount is increased while reducing the exhaust amount of the heat exchange type ventilator 1 . As a result, the pressure inside the room is made positive, and the intrusion of dust and the like can be suppressed. And the indoor air can be kept clean.

When the first control unit 13 determines that heat exchange is unnecessary, the heat exchange ventilator 1 may be configured to switch to a bypass exhaust air passage (not shown) that does not pass through the heat exchange element 6. . As a result, unnecessary heat exchange is not performed, so comfortable air can be supplied to the room.

Switching between the exhaust air passage 8 passing through the heat exchange element 6 and the bypass exhaust air passage may be performed by a damper (not shown).

(Embodiment 4)
A case where the first control unit transmits a control signal to the third control unit will be described in detail as a fourth embodiment of the interlocking of the equipment of the ventilation system composed of the heat exchange type ventilator 1 and the cooker hood 40. .
Parts having the same configuration as those of Embodiments 1 to 3 are assigned the same reference numerals, and detailed description thereof is omitted.

FIG. 16 is a block diagram of the first controller transmitting a control signal to the third controller.

A control method when the heat exchange type ventilator 1 needs to exhaust heat during operation will be described with reference to FIG. 17 . FIG. 17 is a flow chart showing the operation of the ventilation system according to the invention.
A predetermined temperature is _TA . The predetermined temperature _TA is detected by the indoor exhaust temperature sensor 15 .

As shown in FIG. 17, when the operation of the heat exchange ventilator 1 is started (S41), the first control unit 13 controls the predetermined temperature T _A and the temperature from the room air inlet 5 of the heat exchange ventilator 1 It is compared with the intake air (RA) temperature _T2 to determine if heat rejection is required. If "RA temperature T ₂ ≧predetermined temperature T _A ", it is determined that exhaust heat is necessary. (Yes in S42). When it is determined that exhaust heat is necessary, the operation of the range hood with a large amount of ventilation is started (S43), and the rotation speed of the exhaust motor 12 is decreased (S44).

When it is determined that exhaust heat is not necessary (No in S42), the rotation speed of the air supply motor 11 and the rotation speed of the exhaust motor 12 are maintained.

According to this configuration, the cooling load can be reduced when the room temperature is high, such as in summer, and there is a possibility that the cooling cost will increase.

In addition, as shown in FIG. 18 , an integrated control unit 63 having a fourth control unit 62 may be provided, and the heat exchange ventilator 1 and the range hood 40 may be interlocked via the fourth control unit 62 . The integrated control unit 63 is provided, for example, in the living room.

At this time, the first control section and the fourth control section, and the third control section and the fourth control section are electrically connected.

According to this configuration, when the heat exchange type ventilator 1 and a plurality of ventilators are desired to be interlocked, a plurality of relays are prevented from being crowded in the first control unit 13 through the fourth control unit 62. As a result, it is possible not only to prevent the electrical wiring of the first control unit from becoming complicated, but also to prevent the size of the first control unit from increasing, thereby realizing space saving.

Although the ventilation system according to the present invention has been described above based on the embodiments, the present invention is not limited to the embodiments. As long as it does not deviate from the spirit of the present invention, the present embodiment includes various modifications that a person skilled in the art can think of, and the form constructed by combining the components of different embodiments is also included in the scope of the present invention. .

The ventilation system according to the present invention is also effective for applications such as a duct-type heat exchange system and a duct-type air conditioner for the purpose of exchanging heat between outside air and indoor air.

1 heat exchange type ventilator 2 outdoor air inlet 3 indoor air outlet 4 outdoor air inlet 5 indoor air inlet 6 heat exchange element 7 supply air passage 8 exhaust air passage 9 air supply fan 10 exhaust fan 11 for air supply Motor 12 exhaust motor 13 first control unit 14 indoor supply air temperature sensor 15 indoor exhaust temperature sensor 16 indoor exhaust humidity sensor 17 exhaust air blower 18 air supply blower 19 first operation unit 20 bathroom ventilation dryer 21 bathroom air suction port 22 air outlet in bathroom 23 air outlet outside bathroom 24 motor for circulation 25 fan for circulation 26 air path changing means 27 circulation air path 28 ventilation air path 29 second control unit 30 second operation unit 40 range Hood 41 Cooker 42 Toilet ventilation fan 50 Air supply side duct 51 Exhaust side duct 52 Bathroom exhaust duct 53 Range hood exhaust duct 54 Connection duct 55 Cooker upper air inlet 56 Outdoor air outlet 57 Exhaust motor 58 Exhaust fan 59 Ventilation air path 60 Third control unit 61 Third operation unit 62 Fourth control unit 63 Integrated control unit 64 Toilet exhaust duct 100 Ventilation system 100a Ventilation system

Claims (4)

a first ventilation device comprising a supply air blower, an exhaust air blower, and a heat exchanger;
a second ventilator for exhausting air in the bathroom;
an indoor supply air temperature sensor for detecting the temperature of the air blown out from the indoor outlet of the first ventilation device;
an indoor exhaust temperature sensor that detects the temperature of the air sucked from the indoor air inlet of the first ventilation device;
an indoor exhaust humidity sensor for detecting the humidity of the air sucked from the indoor air suction port of the first ventilation device;
a control unit that controls the operation of the first ventilator;
with
The air supply blower includes an air supply motor and an air supply fan,
The exhaust air blower includes an exhaust motor and an exhaust fan,
The heat exchanger exchanges heat between air supplied to the room and air exhausted to the outside,
When the second ventilator performs the exhaust operation, the first ventilator continues the exhaust operation while reducing the rotation speed of the exhaust motor,
When the indoor dew point temperature calculated from the detection results of the indoor exhaust temperature sensor and the indoor exhaust humidity sensor is equal to or higher than the supply air temperature detected by the indoor supply air temperature sensor, the control unit controls the A ventilation system in which the number of revolutions of the exhaust motor is increased within a range less than the number of revolutions before the start of operation of the second ventilator . 2. The ventilation system according to claim 1, wherein the controller reduces the rotation speed of the exhaust motor when determining that heat exchange in the first ventilation device is unnecessary. Air in the bathroom drawn in by the second ventilation device flows into the first ventilation device,
3. The ventilation system according to claim 1 , wherein the heat exchanger is a sensible heat exchange element that recovers heat from the air that has flowed into the bathroom. A third ventilation device is provided above the cooker and performs exhaust,
4. The ventilation system according to any one of claims 1 to 3 , wherein the first ventilation device reduces the rotation speed of the exhaust motor when the third ventilation device performs an exhaust operation.

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