JP7227505B2 - ventilator - Google Patents

Description

The present disclosure relates to ventilators.

Patent Literature 1 discloses a ventilation device that replaces the air in a room by simultaneously supplying air from the outdoors to the room and discharging air from the room to the outside. This ventilator includes a heat exchange unit installed indoors, a blower unit installed outdoors, and an air passage structure connecting the heat exchange unit and the blower unit. The blower unit includes an air supply fan that takes in outdoor air into the blower unit and supplies it into the room, and an exhaust fan that takes in the indoor air into the blower unit and discharges it to the outside. The air passage structure is composed of one duct that connects the blower unit and the heat exchange unit. The interior of the duct is partitioned into an air supply passage and an exhaust passage by a partition.

JP-A-2004-132611

Depending on the usage environment of the ventilation system and indoor conditions, it is desirable to increase the amount of air exhausted to the outside rather than the amount of air supplied to the room to create a negative pressure in the room. There is a case where it is desired to increase the amount of air supply to make the indoor pressure positive. For example, after a large number of people have used the room for a meeting or the like, the exhaust volume is increased more than the air supply volume, and the indoor air is actively exhausted to ventilate the room. The ventilator described in Patent Document 1 cannot meet such a demand.

An object of the present disclosure is to easily change the relationship between the amount of air supplied and the amount of exhaust in a ventilator that performs air supply and exhaust at the same time.

(1) The present disclosure is a ventilation device that simultaneously supplies air from the outdoors to the room and exhausts air from the room to the outdoors,
an air supply fan that generates an air flow from the outdoor to the indoor;
an exhaust fan that generates an air flow from the room to the outside;
a duct connected indoors or outdoors;
a partition member that partitions the inside of the duct into an air supply passage through which the air flow generated by the air supply fan passes and an exhaust passage through which the air flow generated by the exhaust fan passes;
The partition member changes the ratio between the cross-sectional area of the air supply passage and the cross-sectional area of the exhaust passage by deforming.

According to the ventilator having the above configuration, by deforming the partition member, the relationship between the air supply amount and the exhaust amount can be easily changed. and one of the displacements can be made larger than the other.

(2) Preferably, the partition member is deformed by a difference between pressure of air flowing through the air supply passage and pressure of air flowing through the exhaust passage.
According to this configuration, by adjusting the output of at least one of the air supply fan and the exhaust fan, the partition member can be deformed, and the relationship between the air supply amount and the exhaust amount can be changed.

(3) Preferably, when a pressure difference between the pressure of the air flowing through the air supply passage and the pressure of the air flowing through the exhaust passage is equal to or less than a predetermined value, the pressure loss between the air supply passage and the exhaust passage is caused by the partition member. The ratio between the cross-sectional area of the air supply passage and the cross-sectional area of the exhaust passage is set so that
According to this configuration, by setting the difference between the pressure of air flowing through the air supply passage and the pressure of air flowing through the exhaust passage in the duct to be equal to or less than a predetermined value, the pressure loss in the air supply passage and the exhaust passage becomes the same. , the air supply amount and the exhaust amount can be easily made the same.

(4) Preferably, a control device is provided for controlling outputs of the air supply fan and the exhaust fan,
The control device controls outputs of the air supply fan and the exhaust fan to control the first operation mode in which the flow rate of the air flowing through the air supply passage is the same as the flow rate of the air flowing through the exhaust passage; and a second operation mode in which the flow rate of air flowing through the exhaust passage is greater than the flow rate of air flowing through the supply passage.
According to this configuration, the controller controls the ventilation state in which the amount of air supply (flow rate of air flowing through the air supply passage) and the amount of exhaust air (flow rate of air flowing through the exhaust passage) are the same, and that the amount of exhaust air is greater than the amount of air supply. can be switched to either with a large exhaust-dominant ventilation state.

(5) Preferably, the control device controls outputs of the air supply fan and the exhaust fan so that the flow rate of the air flowing through the air supply passage is higher than the flow rate of the air flowing through the exhaust passage. Execute driving mode.
According to this configuration, the control device controls the ventilation state in which the air supply amount and the exhaust amount are the same, the ventilation state in which the exhaust amount is greater than the air supply amount, and the ventilation state in which the air supply amount is greater than the exhaust amount. Can switch to either with air-dominant ventilation state.

(6) Preferably, a control device for controlling the output of the air supply fan and the exhaust fan is provided,
The control device controls outputs of the air supply fan and the exhaust fan to control the first operation mode in which the flow rate of the air flowing through the air supply passage is the same as the flow rate of the air flowing through the exhaust passage; and a third operation mode in which the flow rate of air flowing through the air supply passage is greater than the flow rate of air flowing through the exhaust passage.
According to this configuration, it is possible to switch between a ventilation state in which the air supply amount and the exhaust amount are the same and a ventilation state in which the air supply amount is greater than the exhaust amount, and which is superior to the air supply, by the control device.

(7) Preferably, it includes a detection unit that detects the state of the air in the room,
The control device switches the operation mode based on the detection result of the detection unit.
According to this configuration, ventilation can be performed in an appropriate ventilation state according to the state of the air. The indoor conditions refer to the concentration of carbon dioxide in the room, the presence or absence of viruses, the presence or absence of refrigerant leaking into the room, and the like.

(8) Preferably, the maximum amount of deformation of the partition member is half or less of the maximum width of the air supply passage or the exhaust passage from the partition member.
According to this configuration, even if the cross-sectional area of one of the exhaust passage and the air supply passage is maximized, the cross-sectional area of the other of the exhaust passage and the air supply passage can be sufficiently secured, and the air supply and the air exhaust can be secured. can be reliably performed.

(9) Preferably, it comprises a casing that houses the exhaust fan and the air supply fan and is installed in a building,
The duct connects the casing and the outdoors.

1 is a configuration diagram schematically showing a ventilation device according to a first embodiment of the present disclosure; FIG. FIG. 4 is a schematic cross-sectional view of a first duct; It is a control block diagram of a ventilator. 4 is a flow chart showing the control procedure of the ventilator. Fig. 2 is a configuration diagram schematically showing a ventilation device according to a second embodiment of the present disclosure; FIG. 4 is a schematic cross-sectional view of a first duct; FIG. 11 is a configuration diagram schematically showing a ventilation device according to a third embodiment of the present disclosure; Fig. 10 is a configuration diagram schematically showing a ventilation device according to a fourth embodiment of the present disclosure; It is a schematic cross-sectional view of the 1st duct which concerns on a modification. It is a schematic cross-sectional view of the 1st duct which concerns on a modification.

Hereinafter, embodiments of the present disclosure will be described in detail with reference to the accompanying drawings.
[First Embodiment]
FIG. 1 is a configuration diagram schematically showing a ventilation device according to a first embodiment of the present disclosure.
The ventilation device 10 ventilates the room S2 by exchanging the air of the outdoor S1 and the air of the room S2. The ventilation device 10 is installed, for example, above the ceiling S2a of the room S2 (behind the ceiling), and is connected to the outdoor S1 and the indoor S2. The ventilation device 10 of the present embodiment performs first-class ventilation, and the fans 42 and 43 supply air to the room S2 and exhaust air to the outdoor S1 at the same time.

The ventilator 10 has a casing 13 , a total heat exchanger 41 , an air supply fan 42 , an exhaust fan 43 , and ducts 21 , 22 , 23 . The casing 13 is provided with a return air intake 14 , an exhaust air outlet 15 , an outside air intake 16 , and a supply air outlet 17 . One ends of first to third ducts 21, 22, and 23 are connected to the return air intake 14, the exhaust air outlet 15, the outside air intake 16, and the supply air outlet 17, respectively.

The other end of the second duct 22 connected to the return air intake 14 is connected to the room S2. The return air intake 14 is used to take in the air (return air) RA in the room S2 into the casing 13 via the second duct 22 .

The other end of the first duct 21 connected to the exhaust outlet 15 is connected to the outdoor S1. The exhaust outlet 15 is used to discharge the return air RA taken into the casing 13 to the outside S1 through the first duct 21 as the exhaust EA.

The other end of the first duct 21 connected to the outside air intake 16 is connected to the outdoor S1. The outside air intake 16 is used to take in air (outside air) OA from the outdoor S1 into the casing 13 via the first duct 21 .

The other end of the third duct 23 connected to the supply air outlet 17 is connected to the room S2. The supply air outlet 17 is used to supply the outside air OA taken into the casing 13 into the room S2 via the third duct 23 as supply air SA.

The interior of the first duct 21 is partitioned into two passages by a partition member 31 . Specifically, the inside of the first duct 21 is partitioned into an exhaust passage 21 a communicating with the exhaust outlet 15 and an air supply passage 21 b communicating with the outside air intake 16 . A specific configuration of the partition member 31 will be described later in detail.

A total heat exchanger 41 , an air supply fan 42 and an exhaust fan 43 are housed inside the casing 13 . The exhaust fan 43 generates a first air flow F1 that passes through the return air intake 14 , the total heat exchanger 41 and the exhaust outlet 15 inside the casing 13 . The exhaust fan 43 is configured to push air into the exhaust passage 21 a of the first duct 21 . The exhaust fan 43 has a motor whose rotation speed is changed by inverter control, for example.

The supply air fan 42 generates a second airflow F<b>2 inside the casing 13 through the outside air intake 16 , the total heat exchanger 41 , and the supply air outlet 17 . The air supply fan 42 is configured to draw air to the air supply passage 21 b of the first duct 21 . The air supply fan 42 has a motor whose rotational speed is changed by inverter control, for example.

The total heat exchanger 41 exchanges sensible heat and latent heat (total heat exchange) between the first air flow F1 and the second air flow F2. Therefore, it is possible to prevent the temperature and humidity of the room S2 during cooling from increasing due to the outside air, and the temperature and humidity of the room S2 during heating from decreasing due to the outside air.

FIG. 2 is a schematic cross-sectional view of the first duct; In this specification, a cross section perpendicular to the axis C of the first duct 21 is referred to as a cross section.
The first duct 21 has a circular cross-sectional shape. A partition member 31 is provided inside the first duct 21 . The partition member 31 of this embodiment is connected to the upper end and the lower end of the inside of the first duct 21, and partitions the inside of the first duct 21 into the left and right sides of the exhaust passage 21a and the air supply passage 21b.

The partition member 31 of this embodiment is made of a deformable material. Specifically, the partition member 31 of this embodiment is made of an elastically deformable material. The partition member 31 is made of rubber, synthetic resin, or the like, for example. The partition member 31 has a thickness of 0.3 mm or less, for example.

As shown in FIG. 2B, the partition member 31 changes the ratio of the cross-sectional area of the exhaust passage 21a and the cross-sectional area of the air supply passage 21b in the first duct 21 by expanding and contracting. The partition member 31 of this embodiment deforms due to the difference between the pressure (static pressure) Pa of air passing through the exhaust passage 21a and the pressure (static pressure) Pb of air passing through the supply passage 21b, and crosses the exhaust passage 21a. The ratio between the area and the cross-sectional area of the air supply passage 21b is changed.

For example, when the difference ΔP between the pressure Pa in the exhaust passage 21a and the pressure Pb in the air supply passage 21b is equal to or less than a predetermined threshold value Pth (Pa−Pb=ΔP≦Pth), the partition member 31 moves to the axial center of the first duct 21. The first duct 21 extends substantially straight along the vertical direction on C, and divides the inside of the first duct 21 into two substantially evenly. The position of the partition member 31 at this time is also called "neutral position".

When the partition member 31 is in the neutral position, the cross-sectional area of the exhaust passage 21a and the cross-sectional area of the air supply passage 21b are the same. When the partition member 31 is in the neutral position, the amount of air flowing through the exhaust passage 21a and the amount of air flowing through the air supply passage 21b are set to be the same. be the same.

When the output (motor rotation speed) of the exhaust fan 43 is increased and the difference ΔP between the pressure Pa in the exhaust passage 21a and the pressure Pb in the air supply passage 21b exceeds a predetermined threshold value Pth (ΔP>Pth), the exhaust passage 21a The partition member 31 is elastically deformed so that the cross-sectional area of is larger than the cross-sectional area of the air supply passage 21b. The position of the partition member 31 at this time is also referred to as the "exhaust expansion position".

As described above, when the output of the exhaust fan 43 is increased, the air volume (exhaust volume) of the exhaust passage 21a is increased. When the partition member 31 is deformed to the exhaust expansion position due to an increase in the output of the exhaust fan 43, the cross-sectional area of the exhaust passage 21a is enlarged and the pressure loss is reduced, thereby further increasing the air volume of the exhaust passage 21a. Therefore, the exhaust amount can be increased efficiently in a short time. Conversely, when the partition member 31 is deformed to the exhaust expansion position, the cross-sectional area of the air supply passage 21b is relatively decreased, and the pressure loss is increased. Therefore, the air supply amount can be efficiently reduced in a short time. By increasing the exhaust amount and decreasing the air supply amount, the ventilation state of the room S2 can be made "exhaust dominant (exhaust rich)" in which the exhaust amount is larger than the air supply amount.

As shown in FIG. 2, the amount of deformation of the partition member 31 when deformed from the neutral position to the exhaust expansion position is set to be less than half the radius r of the first duct 21 (r/2). The ratio of the cross-sectional area of the exhaust passage to the cross-sectional area of the air supply passage 26b when the partition member 31 is deformed to the maximum deformation amount (r/2) is 2.5:1. Therefore, even when the partition member 31 is in the exhaust expansion position, the air supply passage 21b can be sufficiently secured, and the air supply fan 42 and the exhaust fan 43 can reliably supply and exhaust air at the same time.

FIG. 3 is a control block diagram of the ventilator.
As shown in FIGS. 1 and 3, the ventilator 10 further comprises a control device 33 and a sensor 34 . The control device 33 has a control section 33a such as a CPU, ASIC, or FPGA that has an arithmetic function, and a storage section 33b such as a ROM or RAM that stores data. The control device 33 exhibits a predetermined function when the control section 33a executes a program stored in the storage section 33b.

The control device 33 controls operations of the air supply fan 42 and the exhaust fan 43 . More specifically, the control device 33 controls the output (motor rotation speed) of the air supply fan 42 and the exhaust fan 43 . The control device 33 controls the output of the air supply fan 42 and the exhaust fan 43, so that the amount of air supplied from the outdoor S1 to the indoor S2 and the amount of exhaust air from the indoor S2 to the outdoor S1 are the same as the first operation mode. and the second operation mode in which the exhaust amount from the indoor S2 to the outdoor S1 is larger than the air supply amount from the outdoor S1 to the indoor S2.

Specifically, the control device 33 executes the first operation mode by controlling the outputs of the air supply fan 42 and the exhaust fan 43 so that the partition member 31 is in the neutral position (standard position). The control device 33 executes the second operation mode by increasing the output of the exhaust fan 43 more than in the first operation mode so that the partition member 31 is at the exhaust expansion position. The control device 33 switches and executes the first operation mode and the second operation mode according to the detection result of the sensor 34 .

A sensor 34 detects the state of the air in the room S2. The sensor 34 is located, for example, near the return air intake 14 . As the sensor 34, for example, the sensors exemplified below can be used.
(a) A _CO2 concentration sensor that detects the carbon dioxide concentration in the room S2.
(b) A virus sensor that detects the presence or absence of viruses in the room S2.
(c) A refrigerant sensor that detects refrigerant leaking from the air conditioner when the ventilator 10 is used together with the air conditioner.
(d) A human sensor that detects the presence (or absence) of a person in the room S2.

When the CO ₂ concentration sensor of (a) above is adopted as the sensor 34, the control device 33 switches from the first operation mode to execute the second operation mode when the CO ₂ concentration exceeds a predetermined threshold value. As a result, the ventilation state of the room S2 is made superior to the exhaust air, and the air in the room S2 can be positively discharged to the outside S1 to reduce the CO ₂ concentration.

When the above sensors (b) and (c) are adopted as the sensor 34, the control device 33 switches from the first operation mode to the second operation mode when a detection target such as a virus or a refrigerant is detected. Execute. As a result, the ventilation state of the room S2 can be made superior to the exhaust, and the detection target can be positively discharged from the room S2 to the outdoor S1.

When the human sensor (d) is adopted as the sensor 34, when the presence of a person in the room S2 is no longer detected, the operation mode is switched from the first operation mode to the second operation mode. As a result, the ventilation state of the room S2 can be made superior to the exhaust, and the air in the room S2 can be positively discharged to the outside S1. For example, after a large number of people use the room S2 in a conference hall, movie theater, etc., the room S2 can be rapidly ventilated when the human sensor detects that no one is present.

A detection result of the sensor 34 is input to the control device 33 . The control device 33 controls outputs of the exhaust fan 43 and the air supply fan 42 according to the detection result of the sensor 34 .

Control of the air supply fan 42 and the exhaust fan 43 by the control device 33 will be described below, taking as an example the case where the sensor 34 is a CO ₂ concentration sensor.
FIG. 4 is a flow chart showing an example of the control procedure of the ventilator.
The control device 33 of the ventilator 10 executes the first operation mode based on an operation start instruction from a user or the like (step S11). That is, the control device 33 drives the air supply fan 42 and the exhaust fan 43, and controls the air supply fan 42 and the exhaust fan 43 so that the partition member 31 of the first duct 21 is in the neutral position (see FIG. 2). Control output.

During operation of the ventilator 10, the sensor 34 constantly or intermittently detects the _CO2 concentration, which is the state of the air. The control device 33 acquires the detection value of the sensor 34 in step S12.

In step S13, the control device 33 determines whether or not the detected value of the sensor 34 is equal to or greater than a predetermined value. When the control device 33 determines that the detected value of the sensor 34 is equal to or greater than the predetermined value, in step S14, the operation mode is switched from the first operation mode to the second operation mode, and the output of the exhaust fan 43 and the air supply fan 42 is changed. to control. Specifically, by increasing the output of the exhaust fan 43, the control device 33 increases the difference between the pressure of the air flowing through the exhaust passage 21a and the pressure of the air flowing through the air supply passage 21b to a predetermined threshold value or more. As a result, the partition member 31 is deformed to the expanded exhaust position (see FIG. 2), the cross-sectional area of the exhaust passage 21a becomes relatively larger than the cross-sectional area of the air supply passage 21b, and the exhaust amount increases more than the air supply amount. do. Therefore, the ventilator 10 is in an "exhaust superiority" operating state in which the amount of exhaust air is greater than the amount of supplied air, and the air in the room S2 with high CO ₂ concentration is actively discharged to the outside S1. After that, the control device 33 returns the process to step S12.

In step S13, when the control device 33 determines that the detected value of the sensor 34 is smaller than the predetermined value, the control device 33 returns the process to step S11 and continues the first operation mode.

[Modification of first duct]
9 and 10 are schematic cross-sectional views of first ducts according to modifications.
In the first duct 21 shown in FIG. 9A, the partition member 31 is formed by bending a plate material made of metal or synthetic resin so that crests and troughs are alternately arranged in the cross section. When the pressure of the air flowing through the exhaust passage 21a increases, the bent portion of the partition member 31 is deformed so as to widen, thereby enlarging the exhaust passage 21a.

In the first duct 21 shown in FIG. 9B, the partition member 31 is formed by bending a plate material made of metal or synthetic resin so that crests and troughs are alternately arranged in the cross section. When the pressure of the air flowing through the exhaust passage 21a increases, the curved portion of the partition member 31 is deformed so as to widen, thereby enlarging the exhaust passage 21a.

In the first duct 21 shown in FIG. 9C, the partition member 31 is made of a flexible soft material such as a thin film made of metal, synthetic resin, or rubber. At the neutral position, the partition member 31 is bent by the pressure of the exhaust passage 21a and the air supply passage 21b. is enlarged.

In the first duct 21 shown in FIG. 10A, the partition member 31 has a pair of first portions 31a and a second portion 31b arranged between the pair of first portions 31a. The pair of first portions 31a are formed of a hard member such as metal or synthetic resin, and are attached to the upper and lower ends of the interior of the first duct 21 so as to be swingable. The pair of first portions 31a are driven by actuators (not shown), for example, fluid pressure cylinders and motors, whose operation is controlled by the control device 33, and rock left and right. The second portion 31b is connected to the free ends of the pair of first portions 31a. The second portion 31b is made of an extensible member made of synthetic resin, rubber, or the like. Therefore, when the pair of first portions 31a swing in the same left-right direction, the second portions 31b extend and move toward the air supply passage 21b, thereby enlarging the exhaust passage 21a. Therefore, in this modified example, the shape of the first portion 31a is controlled by the control device 33 controlling the operation of the actuator rather than by changing the pressure of the air flowing through the first duct 21. FIG.

The first duct 21 shown in FIG. 10B has a rectangular cross section. The partition member 31 is arranged across the diagonal of the first duct 21 . The partition member 31 is made of a stretchable member made of rubber, synthetic resin, or the like. When the pressure of the air flowing through the exhaust passage 21a increases, the partition member 31 is elastically deformed to expand the exhaust passage 21a.

The maximum amount of deformation of the partition member 31 is set to be half L/2 or less of the maximum width L of the exhaust passage 21a from the partition member 31 . Therefore, even when the cross-sectional area of the exhaust passage 21a is maximized, a sufficient cross-sectional area of the air supply passage 21b can be secured, and both air supply and exhaust can be performed reliably.

[Material of partition member]
The partition member 31 can be made of metal, synthetic resin, rubber, or the like, as described above. For example, when the partition member 31 is made of metal, aluminum, an aluminum alloy, copper, a copper alloy, or the like having high thermal conductivity can be used. When the partition member 31 is made of synthetic resin, PET (polyethylene terephthalate) or the like can be used. Regardless of which material is used, the thickness of the partition member 31 is preferably 0.3 mm or less. By setting the thickness in this way, it is possible to promote heat exchange between the air flowing through the exhaust passage 21a and the air flowing through the air supply passage 21b, and the outside air supplied to the room S2 changes the temperature of the room S2. can be suppressed from fluctuating greatly. From the viewpoint of heat exchange between the air flowing through the exhaust passage 21a and the air flowing through the air supply passage 21b, the partition member 31 can be made of a material having a thermal conductivity of 400 to 200 (W/mK). more preferred.

[Second embodiment]
FIG. 5 is a configuration diagram schematically showing a ventilation device according to a second embodiment of the present disclosure. FIG. 6 is a schematic cross-sectional view of the first duct;
In the ventilation device 10 of the present embodiment, the air supply fan 42 is not arranged inside the casing 13, but is arranged outside S1. For example, the air supply fan 42 is installed on the outer wall S1a of the building. The air supply fan 42 is configured to take in air from the outdoor S<b>1 and push it into the air supply passage 21 b of the first duct 21 .

In this embodiment, not only the exhaust fan 43 but also the air supply fan 42 are configured to push air into the first duct 21 . Therefore, as shown in FIG. 6, the partition member 31 can be deformed not only to the neutral position and the exhaust expansion position, but also to the supply expansion position by increasing the output of the supply fan 42 . Thereby, the cross-sectional area of the air supply passage 21b of the first duct 21 can be made larger than the cross-sectional area of the exhaust passage 21a. Therefore, the ventilator 10 can perform the "air supply superiority (air supply rich)" ventilation operation in which the amount of air supplied from the outdoor S1 to the indoor S2 is increased more than the exhaust amount from the indoor S2 to the outdoor S1. can. Since the indoor S2 can be made to have a positive pressure by the ventilator 10 performing the "air supply superiority" ventilation operation, it is effective when it is desired to prevent the inflow of air from the outside into the indoor S2, such as in a clean room. be.

In addition to the first operation mode and the second operation mode, the control device 33 of the present embodiment controls the outputs of the air supply fan 42 and the exhaust fan 43 to perform a third operation in which the amount of air supplied is greater than the amount of exhaust air. mode is executable. Then, the control device 33 can select and execute any one of the first to third operation modes according to the detection result of the sensor 34 .

The maximum amount of deformation of the partition member 31 at the air supply expansion position is less than half the radius r of the first duct 21 (r/2). Also in the second embodiment, it is possible to apply the partition member 31 according to the modification shown in FIGS. 9 and 10 to the first duct 21 .

[Third Embodiment]
FIG. 7 is a configuration diagram schematically showing a ventilation device according to a third embodiment of the present disclosure;
In the ventilator 10 of the present embodiment, the air supply fan 42 and the exhaust fan 43 are installed not inside the casing 13 but outside S1. The exhaust fan 43 is configured to draw air into the exhaust passage 21a of the first duct 21, and the air supply fan 42 is configured to push air into the air supply passage 21b.

Therefore, in the ventilator 10 of the present embodiment, the partition member 31 inside the first duct 21 can take the neutral position shown in FIG. 6 and the expanded air supply position. The control device 33 of this embodiment can select and execute either the first operation mode or the third operation mode.

Also in the third embodiment, it is possible to apply the partition member 31 according to the modification shown in FIGS. 9 and 10 to the first duct 21 .

[Fourth embodiment]
FIG. 8 is a configuration diagram schematically showing a ventilation device according to a fourth embodiment of the present disclosure;
In the ventilator 10 of the present embodiment, separate fourth ducts 24 and fifth ducts 25 are connected to the outside air intake 16 and the exhaust air outlet 15, respectively, and the return air intake 14 and the supply air outlet 17 are connected. A common sixth duct 26 is connected to the . The air supply fan 42 and the exhaust fan 43 are arranged inside the casing 13 as in the first embodiment.

The configuration of the sixth duct 26 is similar to that of the first duct 21 of the first embodiment. The sixth duct 26 is partitioned by a partition member 31 into an exhaust passage 26a and an air supply passage 26b. The exhaust fan 43 is configured to draw air into the exhaust passage 26a of the sixth duct 26, and the air supply fan 42 is configured to push air into the air supply passage 26b.

In the ventilator 10 of the present embodiment, when the number of revolutions of the air supply fan 42 is increased, the air supply passage 26b of the sixth duct 26 is relatively enlarged more than the exhaust passage 26a, and the air supply amount is larger than the exhaust amount. Increased. Therefore, the ventilator 10 can perform the ventilation operation with air supply priority.

As in the third embodiment, the control device 33 of this embodiment can select and execute either the above-described first operation mode or third operation mode.

Also in the fourth embodiment, the partition member 31 according to the modification shown in FIGS. 9 and 10 can be applied to the sixth duct 26.

[Action and effect of the embodiment]
(1) The ventilation device 10 in the above embodiment includes an air supply fan 42 that generates an air flow from the outdoor S1 to the indoor S2, an exhaust fan 43 that generates an air flow from the indoor S2 to the outdoor S1, and the indoor S2 or The duct (the first duct 21 or the sixth duct 26) connected to the outdoor S1, the air supply passages 21b and 26b through which the air flow generated by the air supply fan 42 passes, and the air flow generated by the exhaust fan 43 are A partition member 31 partitioning the inside of the ducts 21, 26 into the exhaust passages 21a, 26a passing therethrough. The partition member 31 changes the ratio between the cross-sectional area of the air supply passage 21b and the cross-sectional area of the exhaust passage 21a by deforming. Therefore, by deforming the partition member 31, the ventilator 10 can easily change the relationship between the air supply amount and the exhaust amount. One of the quantities can be greater than the other.

(2) In the ventilator 10 of the above embodiment, the partition member 31 deforms due to the difference in pressure between the air flowing through the air supply passage 21b and the air flowing through the exhaust passage 21a. Therefore, by adjusting the rotation speed of at least one of the air supply fan 42 and the exhaust fan 43, the partition member 31 can be deformed, and the relationship between the air supply amount and the exhaust amount can be easily changed.

(3) In the ventilator 10 of the above embodiment, when the difference ΔP between the pressure of the air flowing through the air supply passage 21b and the pressure of the air flowing through the exhaust passage 21a is equal to or less than a predetermined value (predetermined threshold value) Pth, the partition member 31 sets the ratio between the cross-sectional area of the air supply passage 21b and the cross-sectional area of the exhaust passage 21a so that the pressure losses in the air supply passage 21b and the exhaust passage 21a are the same. Therefore, the exhaust fan 43 and the air supply fan 42 are adjusted so that the difference ΔP between the pressure of the air flowing through the supply passages 21b and 26b of the ducts 21 and 26 and the pressure of the air flowing through the exhaust passages 21a and 26a is equal to or less than a predetermined value Pth. By controlling the output of , the air supply amount and the exhaust amount can be easily made the same.

(4) The ventilation device 10 of the first and second embodiments includes a controller 33 that controls the output of the air supply fan 42 and the exhaust fan 43. The controller 33 controls the output of the air supply fan 42 and the exhaust fan 43. By controlling the output, the first operation mode in which the flow rate of air flowing through the air supply passage 21b and the flow rate of air flowing through the exhaust passage 21a are the same, and the flow rate of air flowing through the exhaust passage 21a are controlled to flow through the air supply passage 21b. and a second operating mode with a flow rate greater than the air flow rate. Therefore, the control device 33 controls the ventilation state in which the air supply amount (flow rate of air flowing through the air supply passage) and the exhaust amount (flow rate of air flowing through the exhaust passage) are the same, and the ventilation state in which the exhaust amount is larger than the air supply amount. Can switch to either with superior ventilation status.

(5) In the ventilator 10 of the second embodiment, the control device 33 controls the output of the air supply fan 42 and the exhaust fan 43 so that the flow rate of the air flowing through the air supply passage 21b is reduced to the exhaust passage 21a. A third operating mode is implemented that is greater than the flow rate of the flowing air. Therefore, by the control device 33, a ventilation state in which the air supply amount and the exhaust amount are the same, an exhaust superior ventilation state in which the exhaust amount is larger than the air supply amount, and an air supply superior ventilation state in which the air supply amount is larger than the exhaust amount. It can switch to either with the ventilation state.

(6) The ventilation device 10 of the second, third, and fourth embodiments includes a control device 33 that controls the output of the air supply fan 42 and the exhaust fan 43. The control device 33 controls the output of the air supply fan 42 and by controlling the output of the exhaust fan 43, a first operation mode in which the flow rate of the air flowing through the air supply passages 21b and 26b is the same as that of the air flowing through the exhaust passages 21a and 26a, and the air supply passages 21b and 26b. and a third operation mode in which the flow rate of the air flowing through the exhaust passages 21a, 26a is larger than that of the air flowing through the exhaust passages 21a, 26a. Therefore, the ventilator 10 can switch between a ventilation operation in which the air supply amount and the exhaust amount are the same and a ventilation operation in which the air supply amount is larger than the exhaust amount, and which is superior to the supply air.

(7) The ventilator 10 of each of the above embodiments includes a sensor (detector) 34 that detects the state of the air in the room S2. Therefore, ventilation can be performed in an appropriate ventilation state according to the state of the air.

(8) In the ventilator 10 of each of the above embodiments, the maximum amount of deformation of the partition member 31 is half r/2 and L/2 of the maximum widths r and L of the air supply passage 21b or the exhaust passage 21a from the partition member 31. It is below. Therefore, even when the cross-sectional area of one of the exhaust passage 21a and the air supply passage 21b is maximized, the cross-sectional area of the other of the exhaust passage 21a and the air supply passage 21b can be sufficiently secured, and the air supply and the air exhaust can be achieved. can be reliably performed.

The present disclosure is not limited to the above examples, but is indicated by the scope of the claims, and is intended to include all modifications within the scope and meaning equivalent to the scope of the claims.
For example, the ventilator 10 does not have to include the total heat exchanger 41 . The sensor 34 may be provided not only inside the casing 13 but also at a suitable location inside the room S2.
In the ventilator 10, when the amount of air supplied and the amount of exhaust air are the same, the cross-sectional areas of the exhaust passages 21a and 26a of the first duct 21 and the sixth duct 26 and the cross-sectional areas of the air supply passages 21b and 26b are not necessarily the same. It does not have to be (1:1 ratio).

The partition member 31 is not limited to partitioning the exhaust passages 21a, 26a and the air supply passages 21b, 26b of the first duct 21 and the sixth duct 26 in the horizontal direction, but may partition in the vertical direction or other directions. .

10: Ventilator 13: Casing 21: First duct 21a: Exhaust passage 21b: Air supply passage 26: Sixth duct 26a: Exhaust passage 26b: Air supply passage 31: Partition member 33: Control device 42: Air supply fan 43: Exhaust fan L: maximum width S1: outdoor S2: indoor r: maximum width

Claims (8)

A ventilation device that simultaneously supplies air from the outdoor (S1) to the indoor (S2) and exhausts air from the indoor (S2) to the outdoor (S1),
an air supply fan (42) that generates an air flow from the outdoor (S1) to the indoor (S2);
an exhaust fan (43) that is driven at the same time as the air supply fan (42) and generates an air flow from the indoor (S2) to the outdoor (S1);
Ducts (21, 26) connected to the indoor (S2) or outdoor (S1);
The duct is connected to an air supply passage (21b, 26b) through which the air flow generated by the air supply fan (42) passes and an exhaust passage (21a, 26a) through which the air flow generated by the exhaust fan (43) passes. A partition member (31) that partitions the inside of (21, 26),
The partition member (31) is deformed by the difference between the pressure of the air flowing through the air supply passages (21b, 26b) and the pressure of the air flowing through the exhaust passages (21a, 26a). A ventilator that varies the ratio of the cross-sectional area of air supply passages (21b, 26b) and the cross-sectional area of said exhaust passages (21a, 26a). When the difference between the pressure of the air flowing through the air supply passages (21b, 26b) and the pressure of the air flowing through the exhaust passages (21a, 26a) is equal to or less than a predetermined value, the partition member (31) moves the air supply passage ( ratio of the cross-sectional area of the air supply passages (21b, 26b) to the cross-sectional area of the exhaust passages (21a, 26a) so that the pressure losses of the air supply passages (21b, 26b) and the exhaust passages (21a, 26a) are the same 2. The ventilator of claim 1 , wherein is set. A control device (33) for controlling the output of the air supply fan (42) and the exhaust fan (43),
The control device (33) controls the output of the air supply fan (42) and the exhaust fan (43) to control the flow rate of the air flowing through the air supply passages (21b, 26b) and the exhaust passage (21a). , 26a), and a second operation mode in which the flow rate of air flowing through the exhaust passages (21a, 26a) is higher than the flow rate of air flowing through the supply passages (21b, 26b). 3. A ventilator according to claim 1 or 2 , performing two modes of operation. The control device (33) controls the outputs of the air supply fan (42) and the exhaust fan (43) so that the flow rate of the air flowing through the air supply passages (21b, 26b) is adjusted to the level of the exhaust passage (21a). 4. The ventilator according to claim 3 , wherein the third mode of operation is performed with a flow rate greater than the flow rate of the air through the ventilators, 26a). A control device (33) for controlling the output of the air supply fan (42) and the exhaust fan (43),
The control device (33) controls the output of the air supply fan (42) and the exhaust fan (43) to control the flow rate of the air flowing through the air supply passages (21b, 26b) and the exhaust passage (21a). , 26a), and a second operation mode in which the flow rate of air flowing through the supply passages (21b, 26b) is higher than the flow rate of air flowing through the exhaust passages (21a, 26a). 3. A ventilator according to claim 1 or 2 , performing three operating modes. A detection unit (34) that detects the state of the air in the room (S2),
The ventilator according to any one of claims 3 to 5 , wherein said control device (33) switches between operation modes based on the detection result of said detector (34). The maximum amount of deformation of the partition member (31) is less than half the maximum width (r, L) of the air supply passage (21b, 26b) or the exhaust passage (21a, 26a) from the partition member (31). , the ventilator according to any one of claims 1 to 6 . A casing (13) that houses the exhaust fan (43) and the air supply fan (42) and is installed in a building,
Ventilation device according to any one of claims 1 to 7 , wherein the duct (21) connects the casing and the outside (S1).

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