JP2000193278A - Exhauster - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an exhauster which can prevent the exhaust to the outdoor from becoming excessive when the exhauster is used together with another exhauster in the same house. SOLUTION: An exhauster 1 is used together with another exhauster 2 in the same house, is provided with a second fan 14 and a second fan control means 30 which controls the operation of the fan 14 in accordance with an instruction from an operation instructing means 18 for the second fan 14, and discharges the air in the house to the outside when the second fan 14 is operated. The exhauster is also provided with an operating state detecting means 28 which detects the operating state of a first fan 13 and a total exhaust quantity limiting means 29 which limits the total exhaust amount by controlling the operation of the second fan 14 by means of the second fan control means 30 so that the total exhaust amount by means of the first and second fans 13 and 14 may not exceed a prescribed value when the operation of the second fan 14 is instructed from the instructing means 18 and, in addition, the operating state detecting means 28 detects that the first fan 3 is in operation.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an exhaust system used indoors together with other exhaust systems.

[0002]

2. Description of the Related Art Conventionally, a bathroom or toilet in a house is provided with an exhaust port for exhausting air to the outside, and by operating an exhaust fan provided near the exhaust port, indoor humidity is reduced. Air and odorous air were exhausted outside.

In the case where the exhaust fan is provided in this manner, the larger the amount of exhaust by the exhaust fan, the more quickly it can be exhausted outdoors. However, if the exhaust air volume by the exhaust fan is increased without limit, the outside air enters the interior more than necessary and the room temperature decreases, or in a highly airtight house such as a condominium, the interior becomes negative pressure and the door is opened. There is a possibility that adverse effects such as difficulty in opening may occur. Therefore, in order to prevent such an adverse effect from occurring, the exhaust amount of the exhaust fan is set to a relatively small value with a sufficient margin.

[0004] However, in the interior where the exhaust fan is already provided, a device such as a clothes dryer that exhausts to the outside is newly provided, and the clothes dryer and the exhaust fan are used simultaneously. In such a case, there is a possibility that the amount of exhaust air to the outside by both of them becomes excessive. In addition, there is a disadvantage that the excessive exhausting causes adverse effects such as lowering of the room temperature and difficulty in opening the door.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above background, and prevents an excessive exhaust to the outside when used together with another exhaust device in the same room. It is an object of the present invention to provide an exhaust device which is provided.

[0006]

SUMMARY OF THE INVENTION The present invention has been made to achieve the above object, and has a first fan.
A second fan, a second operation instructing means for instructing the operation of the second fan, and a second operation instructing means for instructing the operation of the second fan, which is used indoors together with an exhaust device for exhausting the air outdoors by operating the first fan; And a second fan control unit that controls the operation of the second fan in accordance with an instruction from the instruction unit, and relates to an improvement in an exhaust device that exhausts outdoors by operating the second fan.

[0007] An exhaust system having the first fan is already installed, and the exhaust capacity of the first fan is set indoors so that the exhaust amount of the first fan is not excessive.
When the exhaust device of the present invention having the second fan is newly installed, when the exhaust to the outside by the first fan and the exhaust to the outside by the second fan are performed at the same time,
The total amount of exhaust air to the outside becomes excessive, and there is a possibility that inconvenience such as outside air invading into the interior more than necessary and lowering the room temperature, or that the interior becomes negative pressure and the door becomes difficult to open.

Therefore, in a first embodiment of the present invention, the operation of the second fan is instructed by operating state detecting means for detecting the operating state of the first fan, and the second fan operation instructing means. And, when the operating state detecting means is in a state where the first fan is detected to be operating, that is, when both the first fan and the second fan are operating, A total exhaust amount restriction process for performing a total exhaust amount restriction process of controlling the operation of the second fan by the second fan control means so that the total exhaust amount of the first fan and the second fan does not exceed a predetermined amount. Means.

According to the present invention, the total displacement limiting means can detect the operating state of the first fan by the operating state detecting means. Therefore, the total exhaust amount limiting means can perform the total exhaust amount control process by controlling the operation of the second fan when the first fan is operating, and can perform an excessive outdoor operation. Exhaust can be prevented.

In addition, according to the present invention, even if the exhaust device having the first fan and the exhaust device of the present invention having the second fan are provided side by side from the beginning of the construction of the house, By controlling the operation of the second fan by the total displacement limiting means, the total displacement limiting process can be performed.

Further, the total displacement limiting means is provided with the second
When the operation of the second fan is instructed by the fan operation instructing means and the operating state detecting means detects that the first fan is operating, the second fan is set to the maximum. By operating at a rotation speed lower than the capacity, the total displacement limiting process is performed.

According to the present invention, when the first fan is in operation, the total displacement limiting means operates the second fan at a rotation speed lower than the maximum capacity to thereby allow the second fan to operate. , The total amount of exhaust by the first fan and the second fan can be suppressed. As a result, the total displacement limiting process can be performed.

[0013] Further, the total displacement limiting means is provided with the second
When the operation of the second fan is instructed by the fan operation instructing means and the operation state detecting means detects that the first fan is in operation, the second fan is stopped. By maintaining the state, the total displacement limiting process is performed.

According to the present invention, when the first fan is operating, the total displacement limiting means holds the second fan in a stopped state, so that the first fan and the second fan are stopped. The total displacement by the two fans can be suppressed. As a result, the total displacement limiting process can be performed.

In a second embodiment of the present invention, the operation of the second fan is instructed by the exhaust amount grasping means for grasping the exhaust amount of the first fan and the second fan operation instructing means. In the state, according to the exhaust amount of the first fan grasped by the exhaust amount grasping means, the total exhaust amount of the first fan and the second fan does not exceed a predetermined amount, And a total displacement limiting means for performing a total displacement limiting process for changing the rotation speed of the second fan by the second fan control means.

According to the present invention, the total displacement limiting means grasps the displacement of the first fan so that the total displacement of the first fan and the second fan exceeds the predetermined displacement. The second fan can be operated at as high a speed as possible within a range that does not exist. Therefore, the total displacement limiting process can be performed by maximizing the capacity of the second fan.

Further, the first fan and the second fan exhaust air to the outside via a common exhaust pipe, and the predetermined amount is set to be equal to or less than the maximum exhaust amount of the exhaust pipe. I do.

In an apartment house or the like, since the space for installing the exhaust pipe is limited, the exhaust by the first fan and the exhaust by the second fan are performed through one common exhaust pipe. It is possible. In this case, when the total exhaust amount of the first fan and the second fan exceeds the capacity of the exhaust pipe, normal exhaust may not be performed due to a backflow of the exhaust.

Therefore, by setting the predetermined amount to be equal to or less than the maximum exhaust amount of the exhaust pipe, the total exhaust amount limiting means allows the total exhaust amount of the first fan and the second fan to be the maximum exhaust amount of the exhaust pipe. The operation of the second fan is controlled so as not to exceed the amount of exhaust gas, and it is possible to prevent the backflow of exhaust gas from occurring.

[0020] Further, there is provided a notifying means for notifying that the operation of the second fan is controlled by the total displacement limiting means.

According to the present invention, when the rotation speed of the second fan is changed or stopped against the user's intention by the total exhaust amount restriction process, the notification by the notification means is performed. By doing so, it is possible to prevent the user from misunderstanding that the appliance is out of order or feeling uneasy.

Further, a third embodiment of the present invention is characterized in that the negative pressure detecting means for detecting the indoor negative pressure and the operation of the second fan are instructed by the second fan operation instructing means. A negative pressure limiting unit that performs a negative pressure limiting process of changing the rotation speed of the second fan by the second fan control unit so that the detection pressure of the negative pressure detection unit is equal to or less than a predetermined value. It is characterized by having.

As the amount of exhaust air from the first fan and the second fan increases, the amount of exhaust air from indoor to outdoor becomes larger than the amount of natural air supply from outdoor to indoor air.
The indoor negative pressure increases. Therefore, by controlling the rotation speed of the second fan so that the detection pressure of the negative pressure detection unit becomes equal to or less than a predetermined value, the total exhaust amount of the first fan and the second fan becomes excessive. Can be prevented.

Further, a notifying means for notifying that the negative pressure limiting process is being performed is provided.

According to the present invention, when the rotation speed of the second fan is changed against the user's will by the negative pressure limiting process, the notification by the notification means is performed, so that the use of the second fan is performed. It is possible to prevent a person from misunderstanding that the device is out of order or feeling uneasy.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 is an exhaust configuration diagram including a clothes dryer which is a ventilation device of the present invention, FIG. 2 is a control block diagram of a collective exhaust device and a clothes dryer according to the first embodiment of the present invention, and FIG. 4, FIG. 4 is an operation flowchart of the clothes dryer shown in FIG. 2, and FIG. 5 is a control block diagram of the collective exhaust device and the clothes dryer according to the second embodiment of the present invention. 6, FIG. 6 is a wiring diagram of the strong operation detection relay and the weak operation detection relay shown in FIG. 5, FIG. 7 is an operation flowchart of the clothes dryer shown in FIG. 5, and FIG. 8 shows a third embodiment of the present invention. It is a control block diagram of a collective exhaust device and a clothes dryer.

Referring to FIG. 1, clothes dryer 1 (corresponding to the exhaust device of the present invention) is installed later in a house where collective exhaust device 2 is already provided. The collective exhaust device 2 includes an exhaust fan 3 (corresponding to a first fan of the present invention).
Is operated, the air in the bathroom 4 is sucked from the bathroom exhaust port 5 provided in the bathroom 4, and the air in the toilet 6 is sucked from the toilet exhaust port 7 provided in the toilet 6. Then, the collective exhaust device 2 transfers the sucked air to the collective exhaust pipe 8.
(Corresponding to the exhaust pipe of the present invention) through the outdoor exhaust port 19
From the outside. The start and stop of the operation of the collective exhaust device 2 are instructed by the user operating the bathroom exhaust switch 9 provided in the bathroom 4 or the toilet exhaust switch 10 provided in the toilet 6.

Heat exchanger 13 provided in clothes dryer 1
Is supplied from the water heater 11 through the hot water supply pipe 12 and heats the air by radiating the hot water circulating between the water heater 11 and the heat exchanger 13. The clothes dryer 1 rotates a drying fan 14 (corresponding to a second fan of the present invention),
A clothes drying operation is performed in which the air heated by the heat exchanger 13 is sucked into the rotating drum 15 in which the clothes are stored, and the wet air released from the clothes is discharged to the drying exhaust pipe 16. Since the drying exhaust pipe 16 is connected to the collective exhaust pipe 8 at the connection point 17, the humid air discharged to the dry exhaust pipe 16 is discharged outside via the collective exhaust pipe 8.

The clothes dryer 1 has an operation switch 18 for instructing the user to start and stop the clothes drying operation.
(Corresponding to the second fan operation instructing means of the present invention), and an exhaust amount limiting lamp 20 which lights up when the exhaust amount of the drying fan 14 is limited (corresponding to the notifying means of the present invention).
And

Next, a first embodiment of the present invention will be described with reference to FIGS. Referring to FIG. 2, the entire operation of clothes dryer 1 is controlled by dryer control means 25. In the present embodiment, the dryer control unit 2
5 is provided with the drying fan control means 30 (the second embodiment of the present invention).
The drying fan motor 26 corresponds to a fan control unit).
Is rotated at two speeds, "high speed" and "low speed".

The drying fan control means 30 operates the drying fan motor 26 provided in the drying fan 14 when the operation switch 18 is turned ON to start the clothes drying operation. As a result, the drying rotary blades 27 rotate, and the hot air is sucked into the rotary drum 15 and the rotary drum 1
Exhaust of humid air from 5 takes place. Note that the drying fan motor 26 is also used as a drive motor for the rotating drum 15.

When the bathroom exhaust switch 9 or the toilet exhaust switch 10 is turned on, the exhaust fan control means 21 provided in the collective exhaust device 2 turns on the exhaust fan 3.
The exhaust fan motor 22 provided in the above is operated. As a result, the exhaust rotating blades 23 rotate, and the bathroom exhaust port 5 (FIG. 1)
(See FIG. 1) and the toilet exhaust port 7 (see FIG. 1).

When the exhaust fan 3 provided alone in the collective exhaust device 2 is operated alone, the amount of exhaust to the outside becomes excessive and the outside air is unnecessarily increased indoors. The value is set to a relatively small value with a sufficient margin so that inconveniences such as lowering of the room temperature due to intrusion into the room and difficulty in opening the entrance door due to negative pressure inside the room will not occur.

Here, as shown in FIG. 1, when the clothes dryer 1 is installed later in a house in which the collective exhaust pipe 8 used for exhausting by the collective exhaust device 2 is already installed, the clothes are dried. By connecting the drying exhaust pipe 16 of the dryer 1 to the collective exhaust pipe 8 and sharing the collective exhaust pipe 8 to perform exhaust to the outside, exhaust for exhausting the exhaust of the clothes dryer 1 to the outside is provided. It is not necessary to provide a new tube. Therefore, the installation cost and installation period of the clothes dryer 1 can be reduced.

However, when the clothes dryer 1 is newly installed,
When the drying fan 14 is evacuated to the outside through the common exhaust pipe 8 common to the exhaust fan 3 and the drying fan 14 and the exhaust fan 3 are simultaneously operated, the drying fan 14 and the exhaust fan 3 As a result, as described above, inconvenience such as outside air invading the interior more than necessary arises.

In order to prevent such inconvenience, the clothes dryer 1 is provided with an operating state detecting relay 28 for detecting the operating state of the exhaust fan 3 (corresponding to the operating state detecting means of the present invention). ), And the dryer control means 25 performs a total exhaust amount restriction process for performing a total exhaust amount restriction process of restricting the total exhaust amount of the drying fan 14 and the exhaust fan 3 to a predetermined amount or less that does not cause the above-described inconvenience. Means 29 are provided.

Further, if the total exhaust amount of the drying fan 14 and the exhaust fan 3 exceeds the maximum exhaust amount of the collective exhaust pipe 8, there is a possibility that inconvenience such as backflow of exhaust gas may occur. Maximum displacement (for example, 3m ³ / mi
n) It is set as follows.

Referring to FIG. 3, operating state detection relay 28
Is connected to a power supply line to the motor 22 in parallel with the motor 22. Therefore, when the bathroom exhaust switch 9 or the toilet exhaust switch 10 is turned on to energize the exhaust fan motor 22, the drive coil 40 of the operation state detection relay 28 is also energized, and the relay contact 41 of the operation state detection relay 28 is turned on. Closes. Therefore, the total displacement limiting means 29 provided in the total displacement limiting means 29 is connected to the relay contact 4 of the operating state detection relay 28.
1 by detecting the open / close state of the exhaust fan motor 22.
Can be detected whether or not is operating.

Next, the operation of the dryer control means 25 provided in the clothes dryer 1 will be described with reference to FIGS. 1 to 3 and the flowchart shown in FIG. When the power is turned on, the clothes dryer 1 waits for the ON operation of the operation switch 18 (see FIGS. 1 and 2) in STEP1. When the user turns on the operation switch 18, the dryer control means 25 starts the clothes drying operation. The dryer control means 25 first supplies the water heater 1 in STEP2.
1 (see FIGS. 1 and 2) is started to start hot water supply from the water heater 11 to the heat exchanger 13 (see FIGS. 1 and 2).

Next STEP3 to STEP5 and STEP
STEP 20 to STEP 21 branched from 3 are processing by the total displacement limiting means 29 (see FIG. 2). Referring to FIG. 3, in STEP 3, when it is recognized that the exhaust fan motor 22 is in the operating state (the exhaust fan 3 is in the operating state) based on the open / close state of the relay contact 41 of the operating state detection relay 28, the processing proceeds from STEP 3. The process branches to STEP20.
Then, the total displacement limiting means 29 performs the total displacement limiting process by operating the drying fan 14 at a low speed via the drying fan control means 30.

Here, the rotation speed of the drying fan 14 at the time of the low-speed operation is determined by the installer measuring the exhaust air volume of the exhaust fan 3 using an air volume sensor or the like when the dryer 1 is installed.
That is, the installer sets the rotation speed of the drying fan 14 at the low speed operation so that the exhaust volume at the low speed operation of the drying fan 14 does not exceed the difference between the measured exhaust volume of the exhaust fan 3 and the predetermined amount. To determine. Then, the installation operator operates a speed change dial (not shown) provided in the clothes dryer 1.
To set the rotation speed of the drying fan 14 at the time of low-speed operation.

Therefore, in STEP 20, the drying fan 2
0, the drying fan 14 and the exhaust fan 3 operate simultaneously, and the total exhaust amount of the drying fan 14 and the exhaust fan 3 does not exceed the predetermined amount. Accordingly, it is possible to prevent the above-described inconveniences, such as the occurrence of outside air entering the interior more than necessary due to excessive exhaust to the outside, lowering the room temperature, and the negative pressure in the interior, making it difficult to open the entrance door. ing.

In the following STEP21, the total displacement limiting means 2
9 turns on the displacement limiting lamp 20 (see FIGS. 1 and 2) to notify that the displacement of the clothes dryer 1 is forcibly suppressed. Due to this notification, the rotation speed of the drying fan 14 of the clothes dryer 1 suddenly decreased,
This prevents the user from misunderstanding that the clothes dryer is malfunctioning or having anxiety.

On the other hand, in STEP 3, the exhaust fan motor 22 is switched from the open / closed state of the contact 41 of the operating state detection relay 28.
Is stopped (the exhaust fan 3 is stopped), the process proceeds to STEP4, and the total exhaust amount limiting means 29 is stopped.
The clothes drying operation is performed by operating the drying fan 14 at high speed through the drying fan control means 30. The rotation speed of the drying fan 14 at the time of high-speed operation is set such that the exhaust air amount at the time of high-speed operation of the drying fan 14 is equal to or less than the predetermined amount.

Then, the dryer control means 25 determines in STEP
6, a clothing temperature sensor (not shown) provided in the rotating drum 15 to detect the temperature of the clothing;
When it is determined from the temperature detected by an exhaust gas temperature sensor (not shown) that detects the temperature of the air discharged from the drum that drying of the clothes in the rotating drum 15 has been completed, STEP 6 to ST 6
Branch to EP8.

Also, when the operation switch 18 is turned off in STEP 7, the process proceeds to STEP 8. Then, the dryer control means 25 stops the operation of the water heater 11 in STEP 8, stops the operation of the drying fan via the drying fan control means 30 in STEP 9, and turns off the exhaust amount restriction lamp 20 in STEP 10 to change the clothes. The drying operation ends.

In this embodiment, the drying fan 14 is operated at a low speed in STEP 20, but the operation of the drying fan 14 is stopped so that the drying fan 14 is stopped.
The total exhaust amount of the exhaust fan 3 and the exhaust fan 3 may be prevented from exceeding the predetermined amount.

Next, a second embodiment of the present invention will be described with reference to FIG. 1 and FIGS. Note that the same components as those of the first embodiment are denoted by the same reference numerals, and description thereof is omitted.

The overall configuration of this embodiment is the same as that of the first embodiment shown in FIG. 1, except that the rotational speed of the collective exhaust fan 3 is switched between high speed and low speed. The difference is that the upper limit of the rotation speed of the drying fan 14 of the clothes dryer 1 is switched between three stages of “high speed”, “medium speed”, and “low speed”.

Referring to FIG. 5, bathroom 4 (see FIG. 1) is provided with a bathroom exhaust intensity switch 50 for instructing switching of the rotation speed of exhaust fan 3 in accordance with a user operation. The toilet 6 (see FIG. 1) is also provided with a toilet exhaust strength switch 51 for instructing switching of the rotation speed of the exhaust fan 3 in accordance with a user operation. The exhaust fan control means 21 changes the rotation speed of the exhaust fan 3 into two stages of “high speed” (strong operation) and low speed (weak operation) according to the instructions of the bathroom exhaust intensity switch 50 and the toilet exhaust intensity switch 51. Switch.

In the clothes dryer 1 of the present embodiment, the course of the clothes drying operation can be selected by the user's setting.
0%), normal drying course (drying fan 14
Is operated at 90% of the maximum capacity) and a soft drying course (the drying fan 14 is operated at 80% of the maximum capacity). The dryer control means 25 provided in the clothes dryer 1 is adapted for the selected course.
The rotation speed of the drying fan 14 is controlled via the drying fan control means 30.

Further, the clothes dryer 1 has a strong operation detection relay 52 () for detecting whether at least one of the bathroom exhaust intensity switch 50 and the toilet exhaust intensity switch 51 indicates a strong operation. A weak operation detection relay for detecting whether at least one of the bathroom exhaust intensity switch 50 and the toilet exhaust intensity switch 51 is in a state of instructing a weak operation. 53 (corresponding to the displacement measuring means of the present invention).

Referring to FIG. 6, exhaust fan control means 21
Operates the exhaust fan motor 22 when at least one of the bathroom exhaust switch 9 and the toilet exhaust switch 10 is ON. When at least one of the bathroom exhaust intensity switch 50 and the toilet exhaust intensity switch 51 is set to “strong”, the exhaust fan motor 22 is operated at high speed (strong operation), and the bathroom exhaust intensity switch 50 and When both of the toilet exhaust strength switches 51 are set to “weak”, the exhaust fan motor 22
At low speed (weak operation).

Further, at least one of the bathroom exhaust switch 9 and the toilet exhaust switch 10 is in the ON state, and at least one of the bathroom exhaust intensity switch 50 and the toilet intensity switch 51 is set to “strong”. When the drive coil 54 of the strong operation detection relay 52 is
To the relay contact 55 of the strong operation detection relay 52
Closes. Further, when at least one of the bathroom exhaust switch 9 and the toilet exhaust switch 10 is in the ON state, and at least one of the bathroom exhaust intensity switch 50 and the toilet intensity switch 51 is set to “weak”. , The drive coil 56 of the weak operation detection relay 53
And the relay contact 57 of the weak operation detection relay 53
Closes.

Therefore, the total displacement limiting means 29 provided in the dryer control means 25 determines whether the relay contact 55 of the strong operation detection relay 52 is open or closed and the state of the relay contact 57 of the weak operation detection relay 53 which is open or closed. By detecting, the operating state of the exhaust fan motor 22 (the operating state of the exhaust fan 3) can be recognized, and the exhaust amount of the exhaust fan 3 can be grasped. That is, when the relay contact 55 and the relay contact 57 are both in the open state, the fan motor 22 is in the stopped state, and when the relay contact 55 is in the closed state, the fan displacement 22 is high. When in the operating state, the relay contact 55 is in the open state and the relay contact 57 is in the closed state, it is recognized that the fan motor 22 is in the weak operating state, and the displacement of the exhaust fan 3 can be grasped. .

Next, the operation of the dryer control means 25 according to the present embodiment will be described with reference to FIGS. 1, 5, and 6, and according to the flowchart shown in FIG. As in the first embodiment, when the power is turned on, the clothes dryer 1 waits for the ON operation of the operation switch 18 (see FIGS. 1 and 5) in STEP31. When the user turns on the operation switch 18, the dryer control means 25 starts the clothes drying operation. The dryer control means 25 first activates the water heater 11 (see FIGS. 1 and 5) in STEP 32, and starts hot water supply from the water heater 11 to the heat exchanger 13 (see FIGS. 1 and 5).

The following STEP 33 to STEP 35 and S
STEP50-STEP52 and STEP60-STEP61 branched from the TEP33 are the total displacement limiting means 29.
(See FIG. 5). Referring to FIG. 6, total exhaust amount limiting means 29 determines whether exhaust fan motor 22 is strong based on the open / closed state of relay contact 55 of strong operation detection relay 52 and the open / closed state of relay contact 57 of weak operation detection relay 53. When it is recognized that the vehicle is in the driving state, the operation proceeds to STEP34. Then, the total exhaust amount limiting unit 29 performs the total exhaust amount limiting process by operating the drying fan 3 through the drying fan control unit 30 with “low speed” as an upper limit, regardless of the course selection.

Here, the drying fan motor 2 at "low speed"
The rotation speed of 6 is determined by the installation worker measuring the exhaust air amount in the strong operation of the exhaust fan 3 using an air volume sensor or the like when the dryer 1 is installed. That is, the installation operator determines that the exhaust volume of the drying fan 14 is less than the exhaust fan 3 in the measured strong operation.
The rotation speed of the drying fan 14 at "low speed" is determined so that the difference between the exhaust amount of the drying fan and the predetermined amount is not exceeded. Then, the installer sets the “low speed” provided in the clothes dryer 1.
Operate the speed change dial (not shown) for setting,
The “low speed” rotation speed of the drying fan 14 is set.

For this reason, the total displacement limiting means 29 sets the
In EP34, when the exhaust fan 3 is in the strong operation state,
By operating the drying fan 20 with “low speed” as the upper limit, the total exhaust amount of the drying fan 14 and the exhaust fan 3 can be prevented from exceeding the predetermined amount. This prevents inconveniences such as the above-described excessive air exhausting outside, where outside air enters the interior more than necessary, lowering the room temperature, and negative pressure inside the interior, making it difficult to open the entrance door. ing.

In the following STEP 35, the total displacement limiting means 2
9 turns on the displacement limiting lamp 20 (see FIGS. 1 and 5) to notify that the rotation speed of the drying fan 14 of the clothes dryer 1 is forcibly suppressed. By this notification, the user is prevented from misunderstanding that the clothes dryer has malfunctioned or feeling uneasy.

On the other hand, in STEP 33, the exhaust fan motor 22 is in the weak operating state (the exhaust fan 3 is in the open / close state of the relay contact 55 of the strong operation detecting relay 52 and the relay contact 57 of the weak operation detecting relay 53). When it is recognized that the vehicle is in a weak driving state,
50, and proceed to STEP51. Then, the total displacement limiting means 29 performs the total displacement limiting process by operating the drying fan 3 with "medium speed" as an upper limit.

Here, the drying fan motor 2 at "medium speed"
The rotation speed of 6 is determined by the installation worker measuring the amount of exhaust in the weak operation of the exhaust fan 3 using an air volume sensor or the like when the dryer 1 is installed. That is, the installation operator determines that the exhaust volume of the drying fan 14 is less than the measured exhaust fan 3 in the weak operation.
The rotation speed of the drying fan 14 at "medium speed" is determined so that the difference between the exhaust amount of the drying fan 14 and the predetermined amount is not exceeded. Then, the installer sets the “medium speed” provided in the clothes dryer 1.
Operate the speed change dial (not shown) for setting,
The rotation speed of the drying fan 14 at “medium speed” is set.

Therefore, in STEP 51, the exhaust fan 3
The drying fan 20 at the "medium speed"
, The total exhaust amount of the drying fan 14 and the exhaust fan 3 can be prevented from exceeding the predetermined amount. This prevents inconveniences such as the above-described excessive air exhausting outside, where outside air enters the interior more than necessary, lowering the room temperature, and negative pressure inside the interior, making it difficult to open the entrance door. ing.

In the subsequent STEP 52, as in STEP 35, the total displacement limiting means 29 sets the displacement limiting lamp 20.
(See FIGS. 1 and 5) is turned on to notify the user that the drying ability of the clothes dryer 1 is forcibly suppressed.

In STEP 50, the exhaust fan motor 22 is stopped (the exhaust fan 3 is stopped) based on the open / close state of the relay contact 55 of the strong operation detection relay 52 and the open / close state of the relay contact 57 of the weak operation detection relay 53. When the state is recognized, the flow branches to STEP 60, and the total displacement limiting means 29 sets the drying fan control means 30 (see FIG. 5).
, The drying fan 14 is operated with “high speed” as an upper limit.

Here, the drying fan motor 2 at "high speed"
Naturally, the rotation speed of 6 is set such that when the drying fan motor 26 is operated alone, the exhaust amount of the drying fan 14 does not exceed the predetermined amount. Then, the total exhaust amount limiting means 29 turns off the exhaust amount limiting lamp 20 in STEP 61 to indicate to the user that the total exhaust amount limiting process has not been performed.

Then, the dryer control means 25 sets the first
In the same manner as in the embodiment, when the end of the drying of the clothes is detected in STEP 36 or the operation switch 1
8 is turned off, the operation proceeds to STEP 38 to stop the operation of the water heater 11, and in STEP 39 the drying fan 1
4 is stopped, and the displacement limiting lamp 20 is turned off in STEP 40, and the clothes drying operation ends.

In this embodiment, the total exhaust amount limiting means 29 grasps the exhaust amount of the exhaust fan 3 by detecting the operating state (strong operation / weak operation / operation stop) of the exhaust fan 3. It is also possible to provide a speed sensor for detecting the rotation speed of the exhaust fan motor 22, an air volume sensor for detecting the air volume of the exhaust fan 3, and the like, and to detect the exhaust volume of the exhaust fan 3 based on the detection output of these sensors. .

Next, a third embodiment of the present invention will be described with reference to FIGS. Although the overall configuration of the present embodiment is the same as the first and second embodiments shown in FIG. 1, in this embodiment, the exhaust fan 3
The difference is that excessive exhaust to the outside is prevented by detecting an indoor negative pressure instead of detecting the operating state of the vehicle.

Referring to FIG. 8, a clothes dryer 1 according to the third embodiment includes a negative pressure sensor 80 for detecting indoor negative pressure.
(Corresponding to the negative pressure detecting means of the present invention). The negative pressure limiting means 81 provided in the dryer control means 25
Changes the rotation speed of the drying fan motor 26 (the rotation speed of the drying fan 14) via the drying fan control means 30 so that the detection pressure of the negative pressure sensor 80 becomes equal to or lower than a predetermined value.

Here, as the total amount of exhaust by the exhaust fan 3 and the drying fan 14 increases, the amount of exhaust from indoors to outdoors increases more than the natural air supply from outdoor to indoors. The negative pressure increases. Therefore, by changing the rotation speed of the drying fan control means 30 by the negative pressure limiting means 81 so that the detection pressure of the negative pressure sensor 80 becomes equal to or less than a predetermined value, the first and second embodiments described above are performed. Similarly, the total exhaust amount of the exhaust fan 3 and the drying fan 14 can be prevented from becoming excessive.

Further, when the rotation speed of the drying fan is forcibly suppressed by the negative pressure limiting means 81, the user can mistake the malfunction of the clothes dryer by turning on the displacement limiting lamp 20. And prevent anxiety.

In the first to third embodiments, as shown in FIG. 1, the exhaust fan 3 of the collective exhaust device 2 and the drying fan 14 of the clothes dryer 1 Although the example in which the air is exhausted to the outside through the exhaust pipe 8 has been described, the present invention can be applied to a case in which the collective exhaust device 2 and the clothes dryer 1 perform the exhaust to the outside using separate exhaust pipes. Is possible.

Although the clothes dryer has been described as an example of the exhaust device of the present invention, other types of exhaust devices may be used.

[Brief description of the drawings]

FIG. 1 is an exhaust configuration diagram including a clothes dryer which is a ventilation device of the present invention.

FIG. 2 is a control block diagram of a collective exhaust device and a clothes dryer according to the first embodiment of the present invention.

FIG. 3 is a wiring diagram of the operation state detection relay shown in FIG. 2;

FIG. 4 is an operation flowchart of the clothes dryer shown in FIG. 2;

FIG. 5 is a control block diagram of a collective exhaust device and a clothes dryer according to a second embodiment of the present invention.

FIG. 6 is a wiring diagram of a strong operation detection relay and a weak operation detection relay shown in FIG. 5;

7 is an operation flowchart of the clothes dryer shown in FIG. 5;

FIG. 8 is a control block diagram of a collective exhaust device and a clothes dryer according to a third embodiment of the present invention.

[Explanation of symbols]

1 ... clothes dryer, 2 ... collective exhaust device, 3 ... exhaust fan,
4 ... Bathroom, 5 ... Bathroom exhaust port, 6 ... Toilet, 7 ... Toilet exhaust port, 8 ... Collective exhaust pipe, 9 ... Bathroom exhaust switch, 10 ...
Toilet exhaust switch, 11: water heater, 12: hot water pipe, 1
3 heat exchanger, 14 drying fan, 15 rotating drum,
16 ... Dry exhaust pipe, 17 ... Connection point, 18 ... Operation switch, 19 ... Outdoor exhaust port, 20 ... Discharge limit lamp, 21
... exhaust fan control means, 25 ... dryer control means, 28 ...
Operating state detection relay, 29: total displacement limiting means, 30 ...
Drying fan control means, 50 ... bathroom exhaust intensity switch, 5
DESCRIPTION OF SYMBOLS 1 ... Toilet exhaust strength switch, 52 ... Strong operation detection relay, 53 ... Weak operation detection relay, 80 ... Negative pressure sensor, 81
... Negative pressure limiting means

Continuing on the front page (72) Inventor Yoshikazu Kani 2-26, Fukuzumicho, Nakagawa-ku, Nagoya-shi, Aichi Prefecture Inside Rinnai Corporation (72) Inventor Toshihiro Shigaki 2-26, Fukuzumi-cho, Nakagawa-ku, Nagoya-shi, Aichi Prefecture F term in reference (reference) 3L056 BD07 BE01 BE05

Claims (8)

[Claims] An exhaust system having a first fan and exhausting outdoors by operating the first fan is used in the same room, and instructs operation of a second fan and the second fan. A second fan operation instructing means for controlling the operation of the second fan in accordance with an instruction from the second fan operation instructing means, and operating the second fan. An exhaust device that exhausts air to the outside, wherein an operation state detection unit that detects an operation state of the first fan and an operation of the second fan are instructed by the second fan operation instruction unit, and the operation of the second fan is performed. When the state detecting means detects that the first fan is operating, the second fan is controlled so that the total exhaust amount of the first fan and the second fan does not exceed a predetermined amount. The fan control means Exhaust device being characterized in that a total engine limiting means for performing total engine limiting process for controlling the operation of the second fan. 2. The total exhaust amount limiting means is instructed to operate the second fan by the second fan operation instructing means,
And operating the second fan at a rotation speed lower than the maximum capacity by the second fan control means when the operation state detection means detects that the first fan is operating. The exhaust device according to claim 1, wherein the total exhaust amount limiting process is performed by performing the process. 3. The total exhaust amount limiting means is instructed to operate the second fan by the second fan operation instructing means,
In addition, when the operating state detecting means detects that the first fan is operating, the total exhaust amount limiting process is performed by holding the second fan in a stopped state. The exhaust device according to claim 1, wherein: 4. An exhaust system having a first fan, which is used indoors together with an exhaust device for exhausting outdoors by operating the first fan, and instructing operation of the second fan and the second fan. A second fan operation instructing means for controlling the operation of the second fan in accordance with an instruction from the second fan operation instructing means, and operating the second fan. An exhaust device that exhausts outdoors, an exhaust amount grasping unit that grasps an exhaust amount of the first fan,
When the operation of the second fan is instructed by the second fan operation instructing means, the first fan and the first fan are moved in accordance with the displacement of the first fan grasped by the displacement measuring means. Total exhaust amount limiting means for performing a total exhaust amount limiting process of changing the rotation speed of the second fan by the second fan control means so that the total exhaust amount by the second fan does not exceed a predetermined amount. An exhaust device characterized by the above. 5. The exhaust system according to claim 1, wherein the first fan and the second fan exhaust air to the outside via a common exhaust pipe, and the predetermined amount is set to be equal to or less than a maximum exhaust amount of the exhaust pipe. The exhaust device according to any one of claims 1 to 4, wherein: 6. A notifying means for notifying that said total displacement limiting process is being performed.
6. The exhaust device according to any one of claims 1 to 5. 7. An exhaust system having a first fan, which is used indoors together with an exhaust device for exhausting air to the outside by operating the first fan, and instructing operation of the second fan and the second fan. A second fan operation instructing means for controlling the operation of the second fan in accordance with an instruction from the second fan operation instructing means, and operating the second fan. An exhaust device that exhausts outdoors, comprising: a negative pressure detection unit that detects the indoor negative pressure; and a state in which the operation of the second fan is instructed by the second fan operation instructing unit. Negative pressure limiting means for performing a negative pressure limiting process of changing the rotation speed of the second fan by the second fan control means so that the detected pressure of the negative pressure detecting means is equal to or less than a predetermined value. Exhaust device characterized. 8. The exhaust system according to claim 7, further comprising a notifying unit for notifying that the negative pressure limiting process is being performed.