JPH0682067A - Damper position setter for total heat exchanging ventilator - Google Patents

Abstract

PURPOSE:To provide a total heat exchanging ventilator, capable of detecting the impossibility of detection of a damper position and capable of effecting the backup of switching of ventilation mode when the detection of the damper position is impossible. CONSTITUTION:A detecting signal from a limit switch LS1, detecting the position of ventilation of a damper, is latched into a control circuit M to detect the faulty operation and the like of the limit switch LS1 based on the detecting signal latched into the control circuit M. On the other hand, the position of the damper is recognized by the signal of the limit switch LS1 and, thereafter, a judged damper position is confirmed whether the position coincides with the selected ventilating mode. When it coincides, the setting of the damper position is finished but when it does not coincide, the damper is driven again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a damper position setting device for a total heat exchange ventilation device which can switch between a total heat exchange ventilation mode and a normal ventilation mode by switching a damper.

[0002]

2. Description of the Related Art Conventionally, a damper is used to switch one of the distribution paths of air supply and exhaust,
A total heat exchange ventilation mode in which ventilation is performed while exchanging heat between the supply air and the exhaust air in the heat exchanger, and by bypassing the heat exchanger with either the supply air or the exhaust air, ventilation without heat exchange. A total heat exchange ventilation device has been proposed which can be switched to a normal ventilation mode for performing. The electrical configuration of this total heat exchange ventilation device is shown in FIG.

As shown in FIG. 26, the total heat exchange ventilator is as follows.
A control circuit M for discriminating the set ventilation mode, a damper motor DM for switching a damper (not shown) between a total heat exchange ventilation position and a normal ventilation position, and a control circuit M connected to the control circuit M via transistors Q1 and Q2, respectively. Relays RY1 and RY2 that turn on the damper motor DM based on the ventilation mode determination signal of the circuit M, and a limit that detects the total heat exchange ventilation position of the damper and that turns off the damper motor DM to set the damper to the total heat exchange ventilation position. Switch LS
1 and the normal ventilation position of the damper are detected, and the damper motor DM is set to OF in order to set the damper to the normal ventilation position.
It includes a limit switch LS2 for F and a power supply V.

The limit switch LS1 is shown in FIG.
As shown in (b), the cam 13 has a recess 13a for detecting the total heat exchange ventilation position, which is mounted so as to rotate synchronously with the motor shaft 12 of the damper motor DM. Turns off when detected. On the other hand, the limit switch LS2 is arranged below the limit switch LS1 and is 180 degrees in phase with respect to the recess 13a of the cam 13 which is mounted so as to rotate synchronously with the motor shaft 12 of the damper motor DM. It is in contact with the cam 14 having the recess 14a for detecting the normal ventilation position, which is arranged to face the cam 14, and turns off when the recess 14a of the cam 14 is detected.

In the ventilation mode switching operation of the total heat exchange ventilation device, as shown in the flowchart of FIG. 27, in step S1, the control circuit M sets the total heat exchange ventilation in the set ventilation mode based on the ventilation mode switching signal. Determine whether it is the normal mode or the normal ventilation mode. When it is determined that the set ventilation mode is the total heat exchange ventilation mode, the process proceeds to steps S2 and S3, and the relay RY1 is turned on.
Then, the damper motor DM is turned on. And step S
4, when the limit switch LS1 detects the total heat exchange ventilation position of the damper and turns it off, the damper motor DM turns off in step S5, and the setting of the damper to the total heat exchange ventilation position is completed in step S6.

On the other hand, when it is determined in step S1 that the set ventilation mode is the normal ventilation mode, the process proceeds to steps S7 and S8, the relay RY2 is turned on and the damper motor DM is turned on. Then, in step S9,
When the limit switch LS2 detects the normal ventilation position of the damper and turns OFF, the damper motor DM
Is turned off, and the setting of the damper to the normal ventilation position is completed in step S11.

That is, the switching operation of the ventilation mode is as follows.
As shown in the timing chart of FIG. 28, the limit switches LS1 and LS2 are alternately turned ON / OF by rotating the cams 13 and 14 by a half rotation by the damper motor DM.
Then, the damper is set to the total heat exchange ventilation position and the normal ventilation position.

[0008]

However, the conventional total heat exchange ventilator is limited to the limit switches LS1 and LS2.
OFF signal, that is, the damper position detection information is not taken into the control circuit M, the damper motor, the relay,
An abnormal condition such as a limit switch or wire harness could not be detected. Further, for the total heat exchange ventilator, the actual position of the damper cannot be confirmed for switching the most important ventilation mode, and no backup function is provided.

Therefore, for example, due to the fact that the total heat exchange ventilation mode operation is not performed, element freezing occurs in the winter and the ventilation mode operation according to the set ventilation mode is not performed, so Pests may invade and smoke may flow backwards. The present invention is
In view of the above, it is an object of the present invention to provide a damper position setting device for a total heat exchange ventilation device that can detect an abnormality such as a damper position when switching ventilation modes and can reliably set the damper position to a position corresponding to the ventilation mode.

[0010]

According to a first aspect of the present invention, there is provided a total heat exchange ventilation mode in which heat is exchanged between supply air and exhaust air in a heat exchanger, and the heat exchange ventilation mode. The damper installed in the total heat exchange ventilator that switches the damper between the total heat exchange ventilation position and the normal ventilation position to switch between the normal ventilation mode in which the exchanger is bypassed and ventilation is performed without heat exchange. The position setting device detects the total heat exchange ventilation position and the normal ventilation position of the damper, respectively, and outputs the detection signal to the damper position detecting means, and the ventilation mode changes from the normal ventilation mode to the total heat exchange ventilation mode and the total heat exchange. When switching from ventilation mode to normal ventilation mode, even if a predetermined time has elapsed after receiving a signal related to the switching, the ventilation position is detected by the damper position detection means. When the detection signal of is not output,
It includes an abnormality determining means for determining that the ventilation position cannot be detected by the damper position detecting means.

According to a second aspect of the present invention, there is provided a damper position setting device for a total heat exchange ventilation device according to the first aspect, further comprising ventilation mode storage means for storing the set ventilation mode and normal ventilation for the ventilation mode. The first required time storage means for storing in advance the first required time required for switching the position of the damper when the mode is switched to the total heat exchange ventilation mode, and the ventilation mode is the total heat exchange ventilation mode to the normal ventilation. Second required time storage means for storing in advance a second required time required for switching the position of the damper when switching to the mode, and the damper position detecting means after driving the damper to switch the ventilation mode. The time required for the damper to detect the total heat exchange ventilation position and the normal ventilation position of the damper, respectively, and the first required time storage means and the second
The first time stored by the required time storage means of
Comparing the required time and the second required time of
When the damper position detection time matches the first required time, it is determined that the damper position is the total heat exchange ventilation position, and when the damper position detection time matches the second required time, the damper position is determined. Is a normal ventilation position, and the damper position determined by the damper position determination means and the position of the damper determined by the damper position determination means are compared with the ventilation mode stored in the ventilation mode storage means, and the damper position is determined. Is in the ventilation mode, the damper position setting is ended, and when the damper position is not in the ventilation mode, the damper position confirmation means for re-driving the damper is provided to match them. It is a thing.

According to a third aspect of the present invention, in a heat exchanger, a total heat exchange ventilation mode in which heat is exchanged between supply air and exhaust air and ventilation is performed, and the heat exchanger is bypassed to perform heat exchange. In the damper position setting device installed in the total heat exchange ventilation device, which is performed by switching the damper between the total heat exchange ventilation position and the normal ventilation position, switching between the normal ventilation mode in which ventilation is performed without performing First damper position detecting means for detecting the heat exchange ventilation position and outputting the detection signal, second damper position detecting means for detecting the normal ventilation position of the damper, and outputting the detection signal, ventilation mode is normal ventilation When the mode is switched to the total heat exchange ventilation mode, the total heat exchange exchange is performed from the first damper position detection means even after a predetermined first predetermined time has elapsed after receiving a signal related to the switching. When the position detection signal is not output, the first abnormality determination unit that determines that the first damper position detection unit cannot detect the total heat exchange ventilation position, and the ventilation mode is normally from the total heat exchange ventilation mode. When switching to the ventilation mode, even after the predetermined second predetermined time has elapsed after receiving the signal related to the switching,
A second abnormality determining means is included for determining that the normal ventilation position cannot be detected by the second damper position detecting means when the detection signal of the normal ventilation position is not output from the second damper position detecting means.

According to a fourth aspect of the present invention, the problem solving means is the third aspect.
In the damper position setting device of the total heat exchange ventilation device described above, the first required time required for switching the position of the damper when the ventilation mode is switched from the normal ventilation mode to the total heat exchange ventilation mode is stored in advance. A first required time storage means, a second required time storage that stores in advance a second required time required for switching the position of the damper when the ventilation mode is switched from the total heat exchange ventilation mode to the normal ventilation mode. The second damper position detecting means detects the normal ventilation position when the first damper position detecting means determines that the total heat exchange ventilation position cannot be detected by the first abnormality determining means. Then, after that, the damper is driven for the first required time stored in the first required time storage means to set the total heat exchange ventilation position to the first backup control means, and the second backup control means. When the abnormality determining means determines that the normal ventilation position cannot be detected by the second damper position detecting means, the first damper position detecting means detects the total heat exchange ventilation position, and then the second The second backup control means for driving the damper for the second required time stored in the required time storage means to set the damper to the normal ventilation position is provided.

[0014]

When the ventilation mode is switched from the normal ventilation mode to the total heat exchange ventilation mode and from the total heat exchange ventilation mode to the normal ventilation mode, the abnormality determining means is involved in the switching. After receiving the signal, when the damper position detecting unit does not output the ventilation position detection signal even after a predetermined time has elapsed,
It is determined that the ventilation position cannot be detected by the damper position detecting means. Thereby, the damper position or its defect can be recognized.

According to the present invention, the time required for the damper position determining means to detect the total heat exchange ventilation position and the normal ventilation position of the damper after the damper is driven to switch the ventilation mode. When,
The first required time and the second required time stored by the first required time storage means and the second required time storage means, respectively, are compared. And as a result of the comparison,
When the damper position detection time matches the first required time, it is determined that the damper position is the total heat exchange ventilation position,
When the damper position detection time matches the second required time, it is determined that the damper position is the normal ventilation position.

When the damper position determination is completed, the damper position confirmation means compares the damper position determined by the damper position determination means with the ventilation mode stored in the ventilation mode storage means. As a result of the comparison, when the damper position matches the ventilation mode, the damper position setting is ended, and when the damper position does not match the ventilation mode, the damper is redriven to match them, so The damper position can be confirmed, and the damper can be reliably set to the desired ventilation position.

In the problem solving means according to claim 3, when the ventilation mode is switched from the normal ventilation mode to the total heat exchange ventilation mode, the first abnormality determining means receives the signal relating to the switching and then determines a predetermined first time. If the detection signal of the total heat exchange ventilation position is not output from the first damper position detection means even after the lapse of the predetermined time of 1, the total heat exchange ventilation position cannot be detected by the first damper position detection means. Since it is determined that there is such a defect, it is possible to detect a defect or the like in the first damper position detecting means.

On the other hand, when the ventilation mode is switched from the total heat exchange ventilation mode to the normal ventilation mode, the second abnormality determining means, after receiving the signal relating to the switching, passes the predetermined second predetermined time. Even if the detection signal of the normal ventilation position is not output from the second damper position detection means, it is determined that the normal ventilation position cannot be detected by the second damper position detection means. Therefore, the second damper position is detected. It is possible to detect a defect in the detection means.

In the present invention, when it is determined by the first abnormality determining means that the first damper position detecting means cannot detect the total heat exchange ventilation position, the first backup control means determines that Since the normal ventilation position is detected by the second damper position detecting means, the damper is driven for the first required time stored in the first required time storage means to set the total heat exchange ventilation position. The backup can be performed only by the second damper position detecting means.

On the other hand, when the second abnormality determining means determines that the second damper position detecting means cannot detect the normal ventilation position, the second backup control means detects the first damper position. Means for detecting the total heat exchange ventilation position, and thereafter driving the damper for the second required time stored in the second required time storage means to set the damper to the normal ventilation position. Backup can be performed only by the damper position detecting means.

[0021]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A first embodiment of the present invention will be described below with reference to FIGS.
It will be described in detail based on 3. The same functional components as those of the conventional technique shown in FIG. 26 are designated by the same reference numerals. Figure 1
1 is a cross-sectional plan view of the total heat exchange ventilation device according to the first embodiment of the present invention, and FIG. 12 is a vertical cross-sectional side view of the same. The total heat exchange ventilation device according to the present embodiment will be described with reference to FIGS. 11 and 12.

In FIG. 11 and FIG. 12, reference numeral 1 is a total heat exchange ventilation device main body. The total heat exchange ventilation device main body 1 is formed in a box shape, and the device main body 1 includes an air supply fan 2 for supplying outside air from the outside to the room and an exhaust fan 3 for exhausting indoor air from the inside to the outside. A heat exchanger 4 for exchanging heat between the outside air supplied from the outside to the room by the air supply fan 2 and the indoor air exhausted from the room to the outside by the exhaust fan 3, and the air supply fan 2 And exhaust fan 3
Fan motors FM1 and FM2 for rotating the respective
13, a damper switching mechanism 5 for switching the distribution path of the indoor air shown in FIGS. 13A, 13B, an outside air temperature sensor 6 for detecting the outside air temperature, and a room temperature sensor 7 for detecting the inside temperature. And are decorated.

In addition, as shown in FIG.
A bypass passage P that bypasses the air supply passage R1, the exhaust passage R2, and the heat exchanger 4 is formed. As the outside air temperature sensor 6 and the room temperature sensor 7, a temperature detecting element such as a thermistor is used. The outside air temperature sensor 6 is arranged near the connecting portion with the duct 8, and the room temperature sensor 7 is arranged near the connecting portion with the duct 9.

FIG. 13 shows the structure of the damper switching mechanism. FIG. 13 (a) is a plan view thereof and FIG. 13 (b) is a side view thereof. The configuration of the damper switching mechanism 5 will be described with reference to FIGS. 13 (a) and 13 (b). Damper switching mechanism 5
As shown in FIGS. 13A and 13B, is a damper 11 that is rotatably supported around the vertical axis 10 and switches the distribution of room air.
And a damper motor DM that rotates the damper 11 to switch the damper 11 between the total heat exchange ventilation position and the normal ventilation position.
And a single cam 13 mounted so as to rotate counterclockwise in synchronization with the motor shaft 12 of the damper motor DM.
And one end is attached to the tip of the damper 11 and the other end is attached at a position eccentric from the rotation center of the cam 13, and the connecting rod 15 that connects the damper 11 and the cam 13 comes into contact with the side peripheral surface of the cam 13. The limit switch LS1 detects the total heat exchange ventilation position and the normal ventilation position of the damper 11 and outputs the detection signal.

A predetermined position on the side peripheral surface of the cam 13 is shown in FIG.
As shown in (a), a recess 13a is provided for detecting that the damper 11 has rotated to the total heat exchange ventilation position. In addition, it is 1 with respect to the recess 13a on the side peripheral surface of the cam 13.
A recess 13b for detecting that the damper 11 has rotated to the normal ventilation position is provided at the opposing position that is phased by 80 degrees. Furthermore, the recess 13 on the side peripheral surface of the cam 13
intermediate position between a and the recess 13b, that is, the recesses 13a, 1
A recess 13c for detecting an intermediate position (hereinafter, simply referred to as "intermediate position") between the total heat exchange position and the normal ventilation position is provided at the position where the damper 11 is 90 degrees out of phase. Thus, the recess 13c for detecting the intermediate position is provided with the recess 13a for detecting the total heat exchange ventilation position and the recess 1 for detecting the normal ventilation position.
This is because 3b and 3b are arranged at opposing positions that are 180 degrees out of phase with each other. That is, when the damper 11 is switched from the normal ventilation position to the total heat exchange ventilation position, the limit switch LS1 always contacts the recess 13a for total heat exchange ventilation position after passing through the recess 13c for intermediate position detection. However, when switching from the total heat exchange ventilation position to the normal ventilation position, the limit switch LS1 always contacts the recess 13b for detecting the normal ventilation position without passing through the recess 13c for detecting the intermediate position, and the damper 11 moves. This is so that it can be determined which ventilation position has been switched to. Incidentally, it is needless to say that the recess 13c becomes unnecessary unless the recesses 13a and 13b are arranged at positions facing each other by 180 degrees.

The limit switch LS1 is configured to be in an OFF state when it contacts the recesses 13a, 13b, 13c of the cam 13, and is in an ON state otherwise. That is, when the damper 11 is switched from the normal ventilation position to the total heat exchange ventilation position, the limit switch LS1 is turned off twice before detecting the total heat exchange ventilation position.
A signal is output, and when switching from the total heat exchange ventilation position to the normal ventilation position, 1 is detected before the normal ventilation position is detected.
The OFF signal is output only once.

In this damper switching mechanism 5, depending on how many times the limit switch LS1 is switched from ON to OFF while the cam 13 is rotated half a turn by the damper motor DM, the damper 11 is switched to the total heat exchange ventilation position and the normal ventilation. Set to position. FIG. 1 is a block diagram showing an electrical configuration of a damper position setting device in a total heat exchange ventilation device. The electrical configuration of the damper position setting device of the total heat exchange ventilation device will be described with reference to FIG.

In FIG. 1, M is a CPU and a day RA.
A control circuit including a microcomputer having M, a program ROM, etc., and performs control according to a program stored in advance in the ROM. As shown in FIG. 1, the control circuit M is provided with output signals from the outside air temperature sensor 6, the room temperature sensor 7, the limit switch LS1 and an operation signal from the remote control switch 16, and based on these output signals and operation signals. , ON / OFF of the relay RY1 for controlling energization to the damper motor DM and lighting of the alarm lamp LAMP.

Specifically, the control circuit M has selected the switching of the set ventilation mode based on the output signals from the outside air temperature sensor 6, the room temperature sensor 7, the limit switch LS1 and the operation signal from the remote control switch 16. A function of determining whether or not the setting ventilation mode switching is selected, a function of outputting a ventilation mode switching signal to turn on the relay RY1 to drive the damper motor DM, and an OFF from the limit switch LS1.
Based on the signal (damper position detection signal), it is determined that the damper 11 has rotated to a predetermined position (total heat exchange ventilation position or normal ventilation position) according to the set ventilation mode, and the relay RY
It has a function of turning OFF 1 and setting the damper 11 to the predetermined position.

Further, the control circuit M has a function of previously storing the rotation time required for the cam 13 to make one rotation, and the ventilation mode is from the normal ventilation mode to the total heat exchange ventilation mode and from the total heat exchange ventilation mode to the normal ventilation. When switching to mode
Even if a predetermined time (time required for one rotation of the cam 13) elapses after receiving the signal related to the switching,
When the detection signal of the damper position is not output from the limit switch LS1, the function of determining that the ventilation position cannot be detected by the limit switch LS1 (hereinafter referred to as “OFF detection impossible”) and the OFF detection of the limit switch LS1 cannot be performed. When it is determined that there is an alarm lamp LA
It has a function of lighting MP and notifying that OFF of limit switch LS1 cannot be detected.

Further, the control circuit M has a function of storing the set ventilation mode, a first predetermined time necessary for switching the damper 11 when the ventilation mode is switched from the normal ventilation mode to the total heat exchange ventilation mode. The function of pre-storing the ventilation mode, the function of pre-storing the second predetermined time necessary for switching the damper 11 when the ventilation mode is switched from the total heat exchange ventilation mode to the normal ventilation mode, and the ventilation mode are switched. Ventilation of the damper 11 is performed by comparing the time required for the limit switch LS1 to detect the ventilation position of the damper 11 after driving the damper 11 with the first predetermined time and the second predetermined time. Function to determine the position,
When the determined ventilation position of the damper 11 and the ventilation mode match, the relay RY1 is turned off.
Then, the position setting of the damper 11 is completed, and when the determined ventilation position of the damper 11 and the ventilation mode do not match, the relay RY1 is turned on to match them.
It has the function of driving the damper 11 again by N.

FIG. 2 is a flow chart showing the flow of the ventilation mode switching operation, FIG. 3 is a flow chart showing the continuation of FIG. 2, and FIG. 4 is a flow chart showing the continuation of FIG. Further, FIG. 5 is a timing chart when the damper setting is started, FIG. 6 is a timing chart when the total heat exchange ventilation mode is set, FIG. 7 is a diagram showing the damper position detection pattern of the limit switch, and FIG. 8 is a normal ventilation mode set. FIG. 9 is a diagram showing a damper position detection pattern of the limit switch.

First, the flow of operation at the time of starting damper setting will be described with reference to FIGS. 2 and 5. Figure 2
Referring to, after starting the total heat exchange ventilation device, step S1
When it is determined that the ventilation mode, that is, the switching of the damper 11 is selected in step S2, it is determined whether the ventilation mode selected in step S2 is the total heat exchange ventilation mode. here,
If the total heat exchange ventilation mode is selected, step S3
To set the ventilation flag DIS to 1. On the other hand, if the normal ventilation mode is selected, the ventilation flag DIS is set to 2 in step S4. When the setting of the ventilation flag DIS is completed, the process proceeds to step S5, and the setting of the damper 11 according to the selected ventilation mode is started.

When the setting of the damper 11 is started, it is determined in step S6 whether or not the setting of the damper 11 is the first time,
If the setting of the damper 11 is the first time, the process proceeds to step S8. On the other hand, if the setting of the damper 11 is the second time or later, the process proceeds to step S7, and it is determined whether or not the ventilation flag DIS and the damper flag DIF match. If the ventilation flag DIS and the damper flag DIF match, the setting of the damper 11 is completed, and if the ventilation flag DIS and the damper flag DIF do not match, step S8.
Move to.

In step S8, the limit switch LS
It is determined whether 1 is OFF. If the limit switch LS1 is off, step S1 shown in FIG.
It is thrown into the steps after 3. On the other hand, if the limit switch LS1 is turned on, in step S9, as shown in FIG.
As shown by the solid line in (a) and (b), the relay RY1 is turned on.
However, the drive time of the damper motor DM (hereinafter referred to as “motor drive time”) DMTS is set to, for example, 30 seconds (1 of the cam 13).
(Rotation amount), the motor time count DMTM is cleared, the process proceeds to steps S10 and S11, and the OFF detection signal from the limit switch LS1 is controlled within the motor drive time DMTS time, that is, during one rotation of the cam 13. It is determined whether or not it is input to the circuit M.

At step S10, as shown by the solid line in FIG. 5B, the limit switch LS is set within DMTS = 30 seconds.
When 1 is turned off, steps S13 and thereafter are entered. On the other hand, in step S11, DMTS =
At the time when 30 seconds has elapsed, as shown by the dotted line in FIG. 5B, if there is no OFF detection of the limit switch LS1,
When it is determined that the OFF detection is impossible, the abnormality processing is performed in step S12. At this time, as shown by the dotted line in FIG.
The alarm lamp LAMP is turned on to notify that OFF cannot be detected.

The flow of operation when the damper 11 is set to the total heat exchange ventilation position will be described with reference to FIGS. 3, 4, 6 and 7. First, in steps S8 and S10 shown in FIG. 2, it is assumed that the damper 11 is at the normal ventilation position as shown by (7) in FIG. Referring to FIG. 3, when the process proceeds to step S13, as shown in (a) of FIG. 6, the relay RY1 is turned on, the motor drive time DMTS = 30 seconds is set, the motor time count DMTM is cleared, and the damper 11 is released. To rotate. Then, in steps S14 and S15, the motor drive time DMT
It is determined whether or not there is an OFF detection signal from the limit switch LS1 within S (while the cam 13 makes one rotation).

In step S14, as shown by the solid line in FIG. 6 (a), when the limit switch LS1 is turned off within the DMTS time seconds, the motor time count DMTM is turned on and the limit switch LS1 is turned on in step S16.
The first time (hereinafter, referred to as “first OFF detection time”) from switching to OFF is stored as DMT1,
Control goes to step S17. Here, since the limit switch LS1 detects the total heat exchange ventilation position, as shown in FIG. 7A, the first OFF detection time DMT1 =
T2 is stored. On the other hand, at step S15, when the motor drive time DMTS has elapsed, the limit switch LS1 is turned off as indicated by the dotted line in FIG.
If there is no FF detection, it is determined that OFF detection is impossible, and FIG.
As indicated by the dotted line in (a), after the alarm lamp LAMP is turned on, an abnormality process is performed in step S12.

When the process proceeds to step S17, FIG.
As shown by, the relay RY1 is turned on, the motor drive time DMTS = 30 seconds is set, the motor time count DMTM is cleared, and steps S18 and S19 are performed.
Then, it is determined whether or not there is an OFF detection signal from the limit switch LS1 within the motor drive time DMTS.

In step S18, as shown by the solid line in FIG. 6A, when the limit switch LS1 is turned off within the motor drive time DMTS, the motor time count DMTM is set to the limit switch LS in step S20.
A second time (hereinafter, referred to as “second OFF detection time”) DMT1 from 1 being switched from ON to OFF is stored as DMT2, and is input to steps after step S21 shown in FIG. Here, the limit switch LS1 detects the intermediate position, as shown in FIG.
The OFF detection time DMT2 = T1 (<T2) is stored. On the other hand, in step S15, the motor drive time D
At the time when MTS has passed, as shown by the dotted line in FIG. 6A, if there is no OFF detection of the limit switch LS1, it is determined that OFF detection is not possible, and as shown by the dotted line in FIG. After turning on the LAMP, abnormality processing is performed in step S12.

When the steps shown in FIG. 4 are entered, step S
In 21, the second OFF detection time DMT2 = first
It is determined whether or not the OFF detection time DMT1 of step S2
In 2, it is determined whether or not the second OFF detection time DMT2> the first OFF detection time DMT1. DMT1
Since (T2)> DMT2 (T1) does not apply to any of the above relationships, the process proceeds to step S23.

In step S23, as shown in (a) of FIG. 6, the relay RY1 is turned on, the motor drive time DMTS = 30 seconds is set, the motor time count DMTM is cleared, and in steps S24 and S25,
Limit switch LS1 within motor drive time DMTS
It is determined whether or not there is an OFF detection signal from. In step S24, as shown by the solid line in FIG. 6A, the limit switch LS1 is turned ON within the motor drive time DMTS.
When FF, as shown in (a) of FIG.
Since the ventilation position of is the normal ventilation position, step S30
To set the damper flag DIF to 2, and step S31
Move to. On the other hand, in step S25, when the motor drive time DMTS has elapsed, as shown by the dotted line in FIG. 6A, if OFF detection of the limit switch LS1 is not detected, it is determined that OFF detection is not possible, and FIG. Therefore, as indicated by the dotted line, after the alarm lamp LAMP is turned on, the abnormality processing is performed in step S12.

In step S31, it is determined whether the damper flag DIF and the ventilation flag DIS match. Here, as shown in FIG. 6A, the damper flag DIF (= 2) and the ventilation flag DIS are naturally set.
Since (= 1) does not match, the process proceeds to step S33, and the first OFF detection time DMT1 is replaced with the second OFF detection time DMT2. That is, the first OFF
The detection time DMT1 = T1.

The second O of the first OFF detection time DMT1
When the replacement with the FF detection time DMT2 is completed, the process returns to step S17 of FIG. 3 again, and as shown in (a) of FIG. 6, the relay RY1 is turned on and the motor drive time D
Set MTS = 30 seconds, motor time count DM
TM is cleared, and in steps S18 and S19, the O from the limit switch LS1 is set within the motor drive time DMTS.
It is determined whether or not there is an FF detection signal.

In step S18, as shown by the solid line in FIG. 6 (a), when the limit switch LS1 is turned off within the DMTS time seconds, in step S20, the process shown in FIG.
As shown by, since the limit switch LS1 detects the total heat exchange ventilation position, the second OFF detection time DMT
2 = T2 is stored. Second OFF detection time DMT2
= T2 is stored, in step S22, the second OF
F detection time DMT2 (T2)> first OFF detection time D
Since it is determined to be MT1 (T1), the damper flag DIF is set to 1 corresponding to the total heat exchange ventilation position in step S27, and the process proceeds to step S28.

In step S28, the damper flag DIF (= 1) and the ventilation flag DIS (= 1) coincide with each other, as shown in (a) of FIG.
In step 9, it is determined that the damper setting is completed, and the damper setting is completed. Next, in steps S8 and S10 shown in FIG. 2, it is assumed that the damper 11 is at the intermediate position as shown by (7) in FIG. Referring to FIG. 3, step S14
Then, as shown by the solid line in FIG. 6 (b), when the limit switch LS1 is turned off within the motor drive time DMTS, the limit switch LS1 detects the normal ventilation position in step S16, as shown in FIG. 7 (b). Therefore, the first OFF detection time DMT1 = T1 is stored. Then, in step S18, as shown by the solid line in FIG. 6 (b), when the limit switch LS1 is turned off within the motor drive time DMTS, in step S20, as shown by in FIG. 7 (b), all limit switches LS1 are turned off. Since the heat exchange ventilation position is detected, the second OF
The F detection time DMT2 = T2 (> T1) is stored.

Then, referring to FIG. 4, step S
At 22, the second OFF detection time DMT2 (T2)> first
Since the OFF detection time DMT1 (T1) is determined, the damper flag DIF is set to 1 in step S27. Then, in step S28, since the damper flag DIF (= 1) and the ventilation flag DIS (= 1) coincide with each other, as shown in (b) of FIG. 6, it is determined that the damper setting is completed in step S29.

Subsequently, steps S8 and S1 shown in FIG.
0, it is assumed that the damper 11 is at the total heat exchange ventilation position, as shown in (c) of FIG. Referring to FIG. 3, in step S14, as shown by the solid line in FIG. 6 (c), when limit switch LS1 is turned off within motor drive time DMTS, in step S16, FIG.
As indicated by (c), since the limit switch LS1 detects the intermediate position, the first OFF detection time DMT1
= T1 is stored. Then, in step S18, as shown in FIG.
As shown by the solid line in (c), the motor drive time DM
When the limit switch LS1 is turned off in the TS, the limit switch LS1 detects the normal ventilation position as shown by (c) in FIG. 7 in step S20, so the second OFF detection time DMT2 = T1 is stored.

Then, referring to FIG. 4, step S
At 21, the second OFF detection time DMT1 (T1) = first
Since the OFF detection time DMT2 (T1) is determined, the damper flag DIF is set to 2 in step S26. Then, in step S31, as shown by (c) in FIG. 6, the damper flag DIF (= 2) and the ventilation flag DIS (= 1) naturally do not match, so in step S33, the first OFF detection time DMT1 is set. Replace with T1.

The second O of the first OFF detection time DMT1
When the replacement with the FF detection time DMT2 is completed, the process proceeds to step S18 of FIG. 3 again. In step S18,
As shown by the solid line in FIG. 6C, when the limit switch LS1 is turned off within the motor drive time DMTS,
In step S20, the limit switch LS1 detects the total heat exchange ventilation position, as indicated by a in FIG. 7A, so the second OFF detection time DMT2 = T2 is stored.

Then, referring to FIG. 4, step S
At 22, the second OFF detection time DMT2 (T2)> first
Since the OFF detection time DMT1 (T1) is determined, the damper flag DIF is set to 1 in step S27. Then, in step S28, since the damper flag DIF (= 1) and the ventilation flag DIS (= 1) coincide with each other, as shown in (c) of FIG. 6, it is determined that the damper setting is completed in step S29.

The flow of operation when the damper 11 is set to the normal ventilation position will be described with reference to FIGS. 3, 4 and 8 and 9. First, step S shown in FIG.
8, in S10, as shown in (a) of FIG.
Assume that 1 is in the total heat exchange ventilation position. Referring to FIG. 3, in step S14, as shown by the solid line in FIG. 8 (a), when the limit switch LS1 is turned off within the motor drive time DMTS, in step S16, as shown in FIG. 9 (a), Limit switch L
Since S1 detects the intermediate position, the first OFF detection time DMT1 = T1 is stored. Then, step S18
Then, as shown by the solid line in FIG. 8 (a), when the limit switch LS1 is turned off within the motor drive time DMTS, the limit switch LS1 detects the normal ventilation position in step S20, as shown in FIG. 9 (a). Therefore, the second OFF detection time DMT2 = T1 is stored.

Then, referring to FIG. 4, step S
At 21, the second OFF detection time DMT2 (T1) = first
Since the OFF detection time DMT1 (T1) is determined, the damper flag DIF is set to 2 in step S26. Then, in step S31, FIG.
As shown by, since the damper flag DIF (= 2) and the ventilation flag DIS (= 2) match, it is determined in step S32 that the damper setting is completed.

Next, steps S8 and S10 shown in FIG.
Then, it is assumed that the damper 11 is at the intermediate position, as shown in (b) of FIG. Referring to FIG. 3, in step S14, as indicated by a solid line in FIG.
When the limit switch LS1 is turned off within the TS time second, the normal ventilation position is detected in step S16, as shown in FIG. 9B, so the first OFF detection time DMT1 = T1 is stored. And step S
In FIG. 18, as shown by the solid line in FIG.
If the limit switch LS1 is turned off within S hours and seconds,
In step S20, the limit switch LS1 detects the total heat exchange ventilation position, as indicated by (b) in FIG. 9, so that the second OFF detection time DMT2 = T2 (> T
1) is stored.

Then, referring to FIG. 4, step S
At 22, the second OFF detection time DMT2 (T2)> first
Since the OFF detection time DMT1 (T1) is determined, the damper flag DIF is set to 1 in step S27. Then, in step S28, the damper flag DIF (= 1) and the ventilation flag DIS (= 2) do not match as shown by (8) in FIG. 8B, so the process returns to step S13 in FIG.

Then, referring to FIG. 3, step S14
Then, as shown by the solid line in FIG. 8 (b), when the limit switch LS1 is turned off within the motor drive time DMTS, the intermediate position is detected in step S16, as shown in FIG. 9 (b). The OFF detection time DMT1 = T1 of 1 is stored. Then, step S18
Then, as shown by the solid line in FIG. 8B, when the limit switch LS1 is turned off within the motor drive time DMTS, the limit switch LS1 is moved to the total heat exchange ventilation position in step S20, as shown in FIG. 9B. Is detected, the second OFF detection time DMT2 = T1 is stored.

Then, referring to FIG. 4, step S
At 21, the second OFF detection time DMT2 (T1) = first
Since the OFF detection time DMT1 (T1) is determined, the damper flag DIF is set to 2 in step S26. Then, in step S31, FIG.
As shown by, since the damper flag DIF (= 2) and the ventilation flag DIS (= 2) match, it is determined in step S32 that the damper setting is completed.

Subsequently, steps S8 and S1 shown in FIG.
It is assumed that the damper 11 is at 0 and the damper 11 is in the normal ventilation position, as shown by (9) in FIG. Referring to FIG. 3, in step S14, as shown by the solid line in FIG. 8C, the limit switch LS is set within the motor drive time DMTS.
When 1 is turned off, in step S16, as shown in FIG.
As indicated by (c), since the limit switch LS1 detects the total heat exchange ventilation position, the first OFF detection time DMT1 = T2 is stored. Then, step S18
Then, as shown by the solid line in FIG. 8 (c), when the limit switch LS1 is turned off within the motor drive time DMTS, in step S20, as shown by in FIG. 9 (c),
Since the limit switch LS1 detects the intermediate position, the second OFF detection time DMT2 = T1 (<T2) is stored.

Then, referring to FIG. 4, the first OF
F detection time DMT1 (T2)> second OFF detection time D
Since MT2 = T1, the conditions of steps S21 and S22 are not met, and the process proceeds to step S23. Step S
After shifting to step 23, in step S24, when the limit switch LS1 is turned off within the motor drive time DMTS as indicated by the solid line in FIG.
In FIG. 9, since the normal ventilation position is detected as shown in FIG. 9C, the damper flag DIF is set to 2. Then, in step S31, since the damper flag DIF (= 2) and the ventilation flag DIS (= 2) match as shown in (c) of FIG.
At 32, it is determined that the damper setting is completed.

FIG. 10 is a flow chart showing the abnormality processing operation. The abnormality processing operation will be described with reference to FIG. When the abnormality processing operation is started, step S3
In 4, the abnormality code corresponding to the defect of the limit switch LS1 is set, and in step S35, the ventilation operation is forcibly stopped.

As described above, in the damper position setting device of the total heat exchange ventilation device according to this embodiment, the ventilation mode is switched from the normal ventilation mode to the total heat exchange ventilation mode, and from the total heat exchange ventilation mode to the normal ventilation mode. At this time, when the limit switch LS1 does not output the ventilation position detection signal (OFF detection signal) even after a predetermined time has elapsed after receiving the signal related to the switching, the limit switch LS1 detects the ventilation position. Since it is determined that the limit switch LS1 is impossible, it is possible to detect a defect in the limit switch LS1.

When it is determined that the damper position cannot be detected by the limit switch LS1, the alarm lamp L
Since the AMP is turned on to notify that the damper position of the limit switch LS1 cannot be detected, the user can easily know this and deal with it. Further, the set ventilation mode, the first required time for switching the position of the damper 11 when the ventilation mode is switched from the normal ventilation mode to the total heat exchange ventilation mode, and the ventilation mode is from the total heat exchange ventilation mode. When switching to normal ventilation mode,
The second required time required for switching the position of the damper 11 is stored, and after the damper 11 is driven to switch the ventilation mode, the limit switch LS1 causes the damper 11 to move.
The time required to detect the ventilation position of the damper 11 is compared with the first required time and the second required time to determine the ventilation position of the damper 11, and the determined ventilation position of the damper 11 and the above When the ventilation position of the damper 11 is compared with the stored ventilation mode, the position setting of the damper 11 is ended and the ventilation position of the damper 11 is matched with the ventilation mode. If not, the damper 11 is re-driven to match them, so that the damper position can be confirmed, and the damper 11 can be reliably set to the desired ventilation position.

Next, a second embodiment of the present invention will be described in detail with reference to FIGS. 14 to 25. The damper position setting device of the total heat exchange ventilation device according to the present embodiment detects the total heat exchange ventilation position of the damper 11 with the first limit switch LS1 and sets the normal ventilation position of the damper 11 with the second limit switch LS2. To detect. Then, each limit switch LS1, L
The detection of the OFF detection of S2 is detected, and when one limit switch is disabled, the ventilation position of the damper 11 is set only by the other limit switch.

FIG. 25 shows the structure of the damper switching mechanism of the total heat exchange ventilation device according to the second embodiment of the present invention. FIG. 25 (a) is its plan view and FIG. 25 (b) is its side view. Is.
The configuration of the damper switching mechanism 5 of the total heat exchange ventilation device according to the present embodiment will be described with reference to FIGS. The damper switching mechanism 5 of the total heat exchange ventilation device according to the present embodiment rotates the damper 11 and the damper 11 with respect to the damper motor DM and the motor shaft 12 of the damper motor DM, as shown in FIGS. First cam 13 mounted so as to rotate synchronously with each other, and a second cam 14 arranged below the first cam 13 and mounted so as to rotate synchronously with respect to the motor shaft 12 of the damper motor DM. , One end is attached to the tip of the damper 11, and the other end is attached to a position eccentric from the rotation center of the first cam 13, respectively.
The first limit switch LS1 for contacting the connecting rod 15 connecting 1 with the cam 13 and the side peripheral surface of the first cam 13 for detecting the total heat exchange ventilation position of the damper 11 and outputting the detection signal. And a second limit switch LS2 which comes into contact with the side peripheral surface of the second cam 14 to detect the normal ventilation position of the damper 11 and outputs the detection signal.

At a predetermined position on the side peripheral surface of the first cam 13,
As shown in FIG. 25 (b), a recess 13 a for detecting that the damper 11 has rotated to the total heat exchange ventilation position is provided, and the recess 13 a is formed on the side peripheral surface of the second cam 14 with respect to the recess 13 a. A dent 1 for detecting that the damper 11 has rotated to the normal ventilation position is provided at the facing position 180 degrees in phase.
4a is provided.

The first limit switch LS1 is configured to be in an OFF state when it comes into contact with the recess 13a of the first cam 13, and is in an ON state otherwise. That is, the first limit switch LS1 is
When the recess 13a of the cam 13 is detected, it is determined that the damper 11 has rotated to the total heat exchange ventilation position, and the OFF signal is output. On the other hand, the second limit switch LS2 is configured to be in an OFF state when it comes into contact with the recess 14a of the second cam 14, and is in an ON state otherwise. That is, the second limit switch LS2 is
When the recess 14a of the cam 14 is detected, it is determined that the damper 11 has rotated to the normal ventilation position and an OFF signal is output.

In the damper switching mechanism 5, the limit switches LS1 and LS2 are alternately turned ON / OFF by rotating the cams 13 and 14 by half by the damper motor DM.
It is turned off and the damper is set to the total heat exchange ventilation position and the normal ventilation position. FIG. 14 is a block diagram showing the electrical configuration of the damper position setting device in the total heat exchange ventilation device according to this embodiment. The electrical configuration of the damper position setting device in the total heat exchange ventilation device will be described with reference to FIG. 14.

As shown in FIG. 14, the control circuit M includes an outside air temperature sensor 6, a room temperature sensor 7, limit switches LS1 and LS2.
Output signal from the remote control switch 1
An operation signal from the control unit 6 is applied, and the relay RY1 for controlling the energization of the damper motor DM based on these signals.
ON / OFF and the lighting of the alarm lamp LAMP are controlled.

Specifically, the control circuit M determines whether or not the switching of the set ventilation mode is selected based on the output signals of the outside air temperature sensor 6 and the room temperature sensor 7 or the operation signal from the remote control switch 16. Function,
When it is determined that the setting ventilation mode switching has been selected, a ventilation mode switching signal is output and relay RY1 is turned on.
The damper motor DM, and the damper 1 based on the OFF signal from the first limit switch LS1.
It is determined that 1 has rotated to the total heat exchange ventilation position, and relay R
Based on the function of setting Y1 to OFF and setting the damper 11 to the total heat exchange ventilation position, and the OFF signal from the second limit switch LS2, it is determined that the damper 11 has rotated to the normal ventilation position, and the relay RY1 is turned OFF. Damper 11
Has a function to set the normal ventilation position.

Further, the control circuit M uses the cams 13 and 14 in advance.
A function to store the rotation time required for one rotation,
When the ventilation mode switches from the normal ventilation mode to the total heat exchange ventilation mode, the second limit switch LS2 is turned off.
After the signal is input, the first
When the OFF signal is not input from the limit switch LS1 of, the function to determine that the detection of the total heat exchange ventilation position by the limit switch LS1 is impossible (OFF detection is not possible), and the ventilation mode is from the total heat exchange ventilation mode to the normal ventilation When switching to the mode, when the OFF signal is not input from the second limit switch LS2 even after the above-mentioned required time has elapsed after the OFF signal of the first limit switch LS1 is input, the limit switch LS2 normally operates. A function to determine that the ventilation position cannot be detected (OFF detection is not possible), and each limit switch LS
1, when it is determined that LS2 cannot detect OFF,
The alarm lamp LAMP is turned on and each limit switch LS is turned on.
1 and LS2 have a function of notifying that OFF detection is impossible.

Further, when the control circuit M determines that the OFF detection of the first limit switch LS1 is impossible, the control circuit M first detects the OFF detection of the second limit switch LS2 to confirm the normal ventilation position, and then the cam 13, Backup function by only the second limit switch LS2, which sets the damper 11 to the total heat exchange ventilation position by rotating 14 half a turn,
When it is determined that the OFF detection of the second limit switch LS2 is impossible, first, the OFF detection of the first limit switch LS1 is detected to check the total heat exchange ventilation position, and then the cams 13 and 14 are rotated half a turn. It has a backup function by setting only the first limit switch LS1 for setting the damper 11 to the normal ventilation position.

Next, the operation of switching the ventilation mode of the total heat exchange ventilation device will be described in detail. FIG. 15 is a flowchart showing the ventilation mode switching operation when the limit switches LS1 and LS2 are normal, and FIG. 16 is a timing chart thereof. The ventilation mode switching operation when the limit switches LS1, LS2 are normal will be described with reference to FIGS. 15 and 16.

Referring to FIG. 15, when a ventilation mode switching signal is input to control circuit M, if total heat exchange ventilation is selected in step S1, ventilation flag DIS is set to 1 and normal ventilation is switched to normal ventilation. Ventilation flag DI when selected
Set S to 2. At this time, the control circuit M turns on the relay RY1 to drive the damper motor DM in order to switch the ventilation mode. Here, the ventilation flag DIS is 1
Assuming that the damper 11 has been set to, it is determined in step S2 whether the damper 11 has rotated to the total heat exchange ventilation position. That is, as shown in FIGS. 16C, 16D, and 16E,
The OF from the first limit switch LS1 is added to the control circuit M.
When the F signal is input, the relay RY1 is turned off, the damper motor DM is stopped, the process proceeds to step S5, and the damper flag DIF is set to 1. Then, in step S7, the ventilation flag DIS and the damper flag DIF
It is determined whether and match. Here, in FIG.
If the ventilation flag DIS and the damper flag DIF match as in (a) and (b), it is determined in step S8 that the setting of total heat exchange ventilation is completed.

Next, in step S1, the ventilation flag DIS
Assuming that is set to 2, step S3
Then, it is determined whether or not the damper 11 has rotated to the normal ventilation position. That is, when the OFF signal from the second limit switch LS2 is input to the control circuit M as shown in FIGS. 16C, 16D, and 16E, the relay RY1 is turned OFF.
Then, the damper motor DM is stopped, the process proceeds to step S6, and the damper flag DIF is set to 2. Then, in step S7, it is determined whether or not the ventilation flag DIS and the damper flag DIF match. Here, if the ventilation flag DIS and the damper flag DIF match as shown in FIGS. 16A and 16B, it is determined in step S8 that the setting of normal ventilation is completed.

If the ventilation flag DIS and the damper flag DIF do not match in step S7, the process proceeds to step S9. Further, even if the ventilation flag DIS is set to either 1 or 2 in step S1, there is no OFF detection of the limit switches LS1 and LS2 in steps S2 and S3.
The damper flag DIF is set to 0 in step S4, and the process proceeds to step S9.

When the process proceeds to step S9, relay RY1
Is turned on, the drive time DMTS of the damper motor DM is set to, for example, 30 seconds (one rotation of the cams 13 and 14), the motor time count DMTM and the OFF detection count LSTS are cleared, and the limit switches LS1 and LS are set.
The OFF detection impossible detection operation of No. 2 starts. 17 is a flow chart showing the OFF detection impossible detection operation of the limit switches LS1 and LS2, FIG. 18 is a timing chart showing the OFF detection impossible detection operation of the limit switch LS1, and FIG. 19 is a timing showing the OFF detection impossible detection operation of the limit switch LS2. It is a chart. 17 to 1
9 of the limit switches LS1, LS2 O
The FF detection impossible detection operation will be described.

Referring to FIG. 17, first, assuming that the OFF detection of the first limit switch LS1 is detected, in steps S11, the cams 13, 1 are detected.
While 4 is making one revolution, first limit switch LS
It is determined by 1 whether the total heat exchange ventilation position is detected. That is, as indicated by the dotted line in FIGS. 18D and 18E, if the OFF signal from the first limit switch LS1 is input to the control circuit M first, the relay RY1 is turned on.
The FF is performed, the damper motor DM is stopped, the process proceeds to step S12, the damper flag DIF is set to 1, and the OFF detection count LSTS is counted by +1.
Then, in step S14, it is determined whether or not the ventilation flag DIS and the damper flag DIF match. Here, as shown by the dotted lines in FIGS.
If the ventilation flag DIS and the damper flag DIF match, it is determined in step S15 that the setting of total heat exchange ventilation is completed.

On the other hand, in step S10, FIG.
As indicated by the solid line in (e), the OFF signal from the limit switch LS1 is not input first while the cams 13 and 14 rotate once, and the second limit switch LS2 is sent to the control circuit M in step S11. If the OFF signal from is input, the relay RY1 is turned off to stop the damper motor DM, the process proceeds to step S13, the damper flag DIF is set to 2, and the OFF detection count LSTS is counted by -1. And step S
In FIG. 14, naturally, as shown by the solid lines in FIGS. 18 (a) and 18 (b), the ventilation flag DIS and the damper flag DIF do not coincide with each other, so the process returns to step S10 and the cams 13 and 14 are rotated once again. First, it is determined whether or not the total heat exchange ventilation position is detected by the first limit switch LS1. Here, if the OFF signal from the first limit switch LS1 is input to the control circuit M first, in step S14, as shown by dotted lines in FIGS. 18 (a) and 18 (b), the ventilation flag DIS and the damper flag are set. DI
Since it matches with F, it is determined in step S15 that the setting of total heat exchange ventilation is completed. On the other hand, in step S10, the OF from the first limit switch LS1 is first detected.
If the F signal is not input and the OFF signal from the second limit switch LS2 is input to the control circuit M in step S11, the damper flag D is again input in step S13.
IF set to 2 and OFF detection count L
Further count -1 for STS. And step S
18, the OFF detection count LSTS is -2, so in step S19, as shown in FIG.
As shown in (d), it is confirmed that the total heat exchange position cannot be detected by the first limit switch LS1, and the backup operation is started by only the second limit switch LS2. At this time, as shown in FIG. 18 (f), the alarm lamp LAMP is turned on.
(Lights up) to notify that the limit switch LS1 cannot detect OFF.

Next, the O of the second limit switch LS2
Assuming a case where it is detected whether FF detection is impossible, in step S11, it is determined whether or not the normal ventilation position is first detected by the second limit switch LS2 while the cams 13 and 14 rotate once. Determine. That is, FIG.
As indicated by the dotted lines in (d) and (e), first, in step S11.
Then, if the OFF signal from the second limit switch LS2 is input to the control circuit M, the relay RY1 is turned off.
Then, the damper motor DM is stopped, the process proceeds to step S13, the damper flag DIF is set to 2, and
The FF detection count LSTS is counted by -1. Then, in step S14, it is determined whether or not the ventilation flag DIS and the damper flag DIF match. Here, if the ventilation flag DIS and the damper flag DIF match as shown by the dotted lines in FIGS. 18 (a) and 18 (b),
In step S15, it is determined that the setting of normal ventilation is completed.

On the other hand, in step S10, FIG.
As indicated by the solid line in (e), while the cams 13 and 14 make one revolution, the OF from the first limit switch LS1 is first detected.
If the F signal is input, the relay RY1 is turned off, the damper motor DM is stopped, and the process proceeds to step S12.
The damper flag DIF is set to 1 and the OFF detection count LSTS is counted by +1. And step S1
In FIG. 4, as shown by the solid line in FIGS.
Naturally, since the ventilation flag DIS and the damper flag DIF do not match, the process returns to step S10 again, the cams 13 and 14 are rotated once again, and the normal ventilation position is detected first by the second limit switch LS2. It is determined whether or not Here, if the OFF signal from the first limit switch LS1 is not input first in step S10 and the OFF signal from the second limit switch LS2 is input to the control circuit M in step S11, 14, the ventilation flag DIS and the damper flag DIF are indicated by the dotted lines in FIGS.
Therefore, it is determined in step S15 that the setting of normal ventilation is completed. On the other hand, step S10
Then, if the OFF signal from the first limit switch LS1 is input first, the damper flag DIF is set to 1 again and the OFF detection count LSTS is further incremented by +1 in step S12. Then, in step S16, since the OFF detection count LSTS is +2 count, it is confirmed in step S17 that the normal position cannot be detected by the second limit switch LS2 as shown in FIG. The backup operation is started only by the limit switch LS1. At this time, as shown in FIG. 18 (f), the alarm lamp LAMP is turned on.
Then, the OFF detection impossibility by the first limit switch LS1 is notified.

In step S20, if the OFF detection by both limit switches LS1 and LS2 is not confirmed at the time when the motor drive time DMTS = 30 seconds elapses, the process proceeds to step S21 and the abnormality processing is performed. FIG. 20 is a flow chart showing the backup operation by only the limit switch LS2, and FIG. 21 is the timing chart thereof. The backup operation using only the limit switch LS2 will be described with reference to FIGS. .

Referring to FIG. 20, limit switch LS
When the backup operation is performed only by 2, the cams 13 and 14 are rotated once in step S22, and the normal ventilation position is detected by the limit switch LS2 while the cams 13 and 14 are rotated once in step S23. Or not. Here, if the normal ventilation position is detected by the limit switch LS2, the process proceeds to step S25, and the cams 13 and 14 are rotated once again. Then, in step S26, it is determined whether or not the normal ventilation position is detected by the limit switch LS2 while the cams 13 and 14 rotate once. Here, when the normal ventilation position is detected by the limit switch LS2, the process proceeds to step S28, and as shown in FIGS. 21D and 21E, the normal ventilation position is set as the reference to set the total heat exchange ventilation position. The motor drive time DMTS is set to DMTS / 2 (15 seconds: half rotation of the cams 13 and 14), the motor time count DMTM is cleared, and the damper motor DM is backed up. Then, in step S29, it is determined whether or not the motor drive time DMTS / 2 has elapsed, that is, whether the cams 13 and 14 have rotated half a turn. Here, if it is confirmed that the cams 13 and 14 have rotated half a turn, the process proceeds to step S30,
At that point, the damper motor DM is stopped. This allows
The damper 11 will be set to the total heat exchange ventilation position, as shown in FIG. Then, in step S31, it is determined that the setting of total heat exchange ventilation by only the limit switch LS2 is completed.

In steps S24 and S27,
If the OFF detection by the limit switch LS2 is not confirmed at the time when the motor drive time DMTS = 30 seconds has elapsed, the process proceeds to step S21, and the abnormality processing is performed.
FIG. 22 is a flow chart showing the backup operation only by the limit switch LS1, and FIG. 23 is the timing chart thereof. The backup operation using only the limit switch LS1 will be described with reference to FIGS.

With reference to FIG. 22, the limit switch LS
When the backup operation is performed only by 1, the cams 13 and 14 are rotated once in step S32, and the total heat exchange ventilation position is detected by the limit switch LS1 while the cams 13 and 14 are rotated once in step S33. It is determined whether or not to be performed. Here, the limit switch LS1
If the total heat exchange ventilation position is detected by step S3,
5, the cams 13 and 14 are rotated once again. Then, in step S36, it is determined whether or not the total heat exchange ventilation position is detected by the limit switch LS1 while the cams 13 and 14 rotate once. Here, if the total heat exchange ventilation position is detected by the limit switch LS1, the process proceeds to step S38, and as shown in FIGS. 23D and 23E, the total heat exchange ventilation position is set as the standard ventilation position. Therefore, the motor drive time DMTS is set to DMTS / 2 (15 seconds:
Then, the motor time count DMTM is cleared to drive the damper motor DM as a backup drive. Then, in step S39, it is determined whether or not the motor drive time DMTS / 2 has elapsed, that is, whether or not the cams 13 and 14 have half rotated. Here, if it is confirmed that the cams 13 and 14 have made a half rotation, the process proceeds to step S40, at which point the damper motor DM is stopped. As a result, the damper 11 is set to the normal ventilation position as shown in FIG. Then, in step S41, the limit switch LS
Judge that the setting of normal ventilation by only 1 is completed.

In steps S34 and S37,
If the OFF detection by the limit switch LS1 is not confirmed at the time when the motor drive time DMTS = 30 seconds has elapsed, the process proceeds to step S21, and the abnormality processing is performed.
FIG. 24 is a flowchart showing the abnormality processing operation. The abnormality processing operation will be described with reference to FIG.

When the abnormality processing operation is started, step S
At 42, an abnormality code corresponding to the defect is set in the limit switches LS1 and LS2, and at step S43,
Forcibly stop ventilation operation. As described above, in the total heat exchange ventilation device of the present embodiment, the rotation time required for the cams 13 and 14 to make one rotation is stored in advance, and the ventilation mode is switched from the normal ventilation mode to the total heat exchange ventilation mode. When
When the OFF signal is not input from the first limit switch LS1 even after the above required time has elapsed after the OFF signal of the second limit switch LS2 is input, detection of the total heat exchange ventilation position by the limit switch LS1 is detected. Is determined to be impossible, the first limit switch L
The defect of S1 can be detected. On the other hand, when the ventilation mode is switched from the total heat exchange ventilation mode to the normal ventilation mode, even if the above-mentioned required time has elapsed after the OFF signal of the first limit switch LS1 was input, the second limit switch LS2 When the OFF signal is not input, it is determined that the normal ventilation position cannot be detected by the limit switch LS2, so the second limit switch L
The defect of S2 can be detected.

Further, each limit switch LS1, LS2
When it is determined that the damper position cannot be detected by the warning lamp LAMP, the limit lamp LS is turned on.
Since the fact that the damper positions of 1 and LS2 cannot be detected is notified, the user can easily know this and can deal with it. Further, when it is determined that the OFF detection of the first limit switch LS1 is impossible, first, the second mitt switch L
The OFF detection of S2 is detected to confirm the normal ventilation position, and then the cams 13 and 14 are rotated half a turn to set the damper 11 to the total heat exchange ventilation position. Therefore, the second limit switch L
Backup by S2 only becomes possible.

On the other hand, the O of the second limit switch LS2
When it is determined that the FF cannot be detected, first the OFF detection of the first limit switch LS1 is detected to confirm the total heat exchange ventilation position, and then the cams 13 and 14 are rotated half a turn to make the damper 1
Since 1 is set to the normal ventilation position, backup can be performed only by the first limit switch LS1. The present invention is not limited to the above embodiment,
Of course, many changes or modifications can be made within the scope of the invention.

For example, in the first embodiment, the cam 1
Instead of arranging the recesses 13a and 13b of 3 in a 180-degree opposed relationship, they may be opposed to other positions so that OFF detection of the limit switch LS1 and the position of the damper can be confirmed. Further, in the second embodiment, the limiter switches LS1 and LS2 are alternately turned on / off by rotating the cams 13 and 14 by half rotation by the damper motor DM, and the damper is set to the total heat exchange ventilation position and the normal ventilation position. Although the case where the present invention is applied to the damper switching mechanism 5 has been described, the recesses 1 of the cams 13 and 14 are described.
3a and 14a are not opposed to each other at a position 180 degrees in phase with each other, but the recesses 13a and 14a are opposed to each other at a position other than this, and while the cams 13 and 14 rotate once, the recess 13
The time from the detection of a to the detection of the depression 14a is
The time from the detection of the recess 14a to the detection of the recess 13a is stored in advance, and each limit switch LS is stored.
It is also possible to detect that OFF detection of 1 and LS2 is impossible and to back up only by the limit switches LS1 and LS2.

[0090]

As is apparent from the above description, according to claim 1 of the present invention, when the ventilation mode is switched from the normal ventilation mode to the total heat exchange ventilation mode and from the total heat exchange ventilation mode to the normal ventilation mode, When the ventilation position detection signal is not output from the damper position detection means even after a predetermined time has elapsed after receiving the signal related to switching, it is determined that the damper position detection means cannot detect the ventilation position. Therefore, it is possible to determine a defect of the damper position detecting means.

In claim 2, after the damper position determination is completed, the damper position determined by the damper position determination means is compared with the ventilation mode stored in the ventilation mode storage means. As a result of the comparison, when the damper position matches the ventilation mode, the damper position setting is completed,
When the damper position does not match the ventilation mode, the damper is re-driven to match them, so that the damper position can be confirmed and the damper can be reliably set to the desired ventilation position.

According to the third aspect, when the ventilation mode is switched from the normal ventilation mode to the total heat exchange ventilation mode, even if the predetermined first predetermined time has elapsed after receiving the signal related to the switching, When the detection signal of the total heat exchange ventilation position is not output from the damper position detection means of No. 1, the first
When it is determined that the total heat exchange ventilation position cannot be detected by the damper position detection means of, when the ventilation mode is switched from the total heat exchange ventilation mode to the normal ventilation mode, after receiving a signal related to the switching, When the second damper position detecting means does not output the detection signal of the normal ventilation position even after the elapse of the second predetermined time, the second damper position detecting means cannot detect the normal ventilation position. Since the determination is made, it is possible to detect a defect in each damper position detecting means.

In the fourth aspect, when it is determined by the first determining means that the first damper position detecting means cannot detect the total heat exchange ventilation position, the first backup control means sets the second backup control means by the second backup control means. The normal ventilation position is detected by the damper position detecting means, and then the damper is driven for the first required time stored in the first required time storage means to set the total heat exchange ventilation position. When it is determined by the second determination means that the normal ventilation position cannot be detected by the second damper position detection means, the second backup control means uses the first damper position detection means for total heat exchange. Since the ventilation position is detected and then the damper is driven for the second required time stored in the second required time storage means to set the normal ventilation position, it is possible to back up only by each damper position detection means. Become

[Brief description of drawings]

FIG. 1 is a block diagram showing an electrical configuration of a damper position setting device in a total heat exchange ventilation device according to a first embodiment of the present invention.

FIG. 2 is a flowchart showing a ventilation mode switching operation.

FIG. 3 is a flowchart showing the continuation of FIG.

FIG. 4 is a flowchart showing the continuation of FIG.

FIG. 5 is a timing chart at the start of damper setting.

FIG. 6 is a timing chart when the total heat exchange ventilation mode is set.

FIG. 7 is a diagram showing a damper position detection pattern of the limit switch L in the same manner.

FIG. 8 is a timing chart when the normal ventilation mode is set.

FIG. 9 is a diagram showing a damper position detection pattern of the limit switch, similarly.

FIG. 10 is a flowchart showing an abnormality processing operation.

FIG. 11 is a cross-sectional plan view of the total heat exchange ventilation device.

FIG. 12 is likewise a vertical side view.

13A and 13B show a structure of a damper switching mechanism, FIG. 13A is a plan view thereof, and FIG. 13B is a side view thereof.

FIG. 14 is a block diagram showing an electrical configuration of a damper position setting device in the total heat exchange ventilation device according to the second embodiment of the present invention.

FIG. 15 is a flowchart showing a ventilation mode switching operation when limit switches LS1 and LS2 are normal.

FIG. 16 is a timing chart of the same.

FIG. 17 is a flowchart showing an OFF detection impossible detection operation of limit switches LS1 and LS2.

FIG. 18 is a timing chart showing an OFF detection impossible detection operation of the limit switch LS1.

FIG. 19 is a timing chart showing an OFF detection impossible detection operation of the limit switch LS2.

FIG. 20 is a flowchart showing a backup operation only with the limit switch LS2.

FIG. 21 is a timing chart of the same.

FIG. 22 is a flowchart showing a backup operation by only the limit switch LS1.

FIG. 23 is a timing chart of the same.

FIG. 24 is a flowchart showing an abnormality processing operation.

25A and 25B show a structure of a damper switching mechanism, FIG. 25A is a plan view thereof, and FIG. 25B is a side view thereof.

FIG. 26 is a block diagram showing an electrical configuration of a conventional total heat exchange ventilation device.

FIG. 27 is a flowchart showing a ventilation mode switching operation.

FIG. 28 is a timing chart of the same.

[Explanation of symbols]

 4 Heat Exchanger 5 Damper Switching Mechanism 11 Damper 13,14 Cam 13a, 13b, 13c, 14a Recess 15 Connecting Rod M Control Circuit DM Damper Motor RY1 Relay LS1, LS2 Limit Switch

Claims (4)

[Claims] 1. A total heat exchange ventilation mode in which ventilation is performed in the heat exchanger (4) while performing heat exchange between the supply air and the exhaust air,
Switching to the normal ventilation mode, in which the heat exchanger (4) is bypassed and ventilation is performed without heat exchange, the damper (1
The total heat exchange ventilation position and the normal ventilation position of the damper (11) are detected in the damper position setting device installed in the total heat exchange ventilation device that is performed by switching 1) between the total heat exchange ventilation position and the normal ventilation position. However, the damper position detection means (LS1) that outputs the detection signal, and the signal related to the switching when the ventilation mode switches from the normal ventilation mode to the total heat exchange ventilation mode and from the total heat exchange ventilation mode to the normal ventilation mode. If the ventilation position detection signal is not output from the damper position detection means (LS1) even if a predetermined time has elapsed after receiving the response, the damper position detection means (LS1) cannot detect the ventilation position. A damper position setting device for a total heat exchange ventilation device, characterized in that it includes an abnormality determining means for determining 2. The damper position setting device for a total heat exchange ventilation device according to claim 1, further comprising a ventilation mode storage means for storing the set ventilation mode, and the ventilation mode from the normal ventilation mode to the total heat exchange ventilation mode. When switching, the first required time storage means for storing in advance the first required time required for switching the position of the damper (11), when the ventilation mode is switched from the total heat exchange ventilation mode to the normal ventilation mode The second required time storage means for storing in advance the second required time required to switch the position of the damper (11), the damper (11) is driven to switch the ventilation mode, and then the damper position detection is performed. The time required for the means (LS1) to detect the ventilation position of the damper (11) and the first required time stored in the first required time storage means and the second required time storage means, respectively, and 2 is compared with the required time and the damper position discriminating means for discriminating the ventilation position of the damper (11), the ventilation position of the damper (11) discriminated by the damper position discriminating means, and the ventilation mode storage means are stored. If the ventilation position of the damper (11) matches the ventilation mode stored, and the ventilation position of the damper (11) matches, the position setting of the damper (11) is completed and the ventilation position of the damper (11) is ended. When the ventilation mode does not match with the ventilation mode, a damper position confirmation device for reactivating the damper (11) is provided so as to match them, and the damper position setting device for the total heat exchange ventilation device. 3. A total heat exchange ventilation mode in which ventilation is performed in the heat exchanger (4) while performing heat exchange between supply air and exhaust air,
Switching to the normal ventilation mode, in which the heat exchanger (4) is bypassed and ventilation is performed without heat exchange, the damper (1
In the damper position setting device installed in the total heat exchange ventilation device that is performed by switching 1) between the total heat exchange ventilation position and the normal ventilation position, the total heat exchange ventilation position of the damper (11) is detected and the detection signal concerned is detected. The first damper position detecting means (LS1) which outputs the, the second damper position detecting means (LS2) which detects the normal ventilation position of the damper (11) and outputs the detection signal concerned, the ventilation mode from the normal ventilation mode When switching to total heat exchange ventilation mode, after receiving a signal related to the switching,
When the detection signal of the total heat exchange ventilation position is not output from the first damper position detecting means (LS1) even after the elapse of the first predetermined time set in advance, the first damper position detecting means (LS
The first abnormality determining means for determining that the detection of the total heat exchange ventilation position by 1) is impossible, and when the ventilation mode is switched from the total heat exchange ventilation mode to the normal ventilation mode, a signal related to the switching is received. After that, the second damper position detecting means (LS2) even if a predetermined second predetermined time has elapsed.
When the normal ventilation position detection signal is not output from the second damper position detecting means (LS2), it is possible to detect that the normal ventilation position cannot be detected. Damper position setting device for heat exchange ventilator. 4. The damper position setting device for the total heat exchange ventilation device according to claim 3, which is necessary for switching the position of the damper (11) when the ventilation mode is switched from the normal ventilation mode to the total heat exchange ventilation mode. A first required time storage means for storing in advance the first required time, a second required for switching the position of the damper (11) when the ventilation mode is switched from the total heat exchange ventilation mode to the normal ventilation mode. Second required time storage means for storing required time in advance, first damper position detecting means by the first abnormality determination means
When it is determined that the total heat exchange ventilation position cannot be detected by (LS1), the second damper position detection means (LS2) detects the normal ventilation position, and then the first required time storage means is used. The damper (11) is driven only for the stored first required time to set the total heat exchange ventilation position to the first backup control means and the second abnormality determination means to detect the second damper position. When it is determined that the normal ventilation position cannot be detected by the means (LS2), the first damper position detection means (LS1) detects the total heat exchange ventilation position, and then the second required time storage means A damper position setting device for a total heat exchange ventilation device, comprising a second backup control means for driving the damper (11) for a second stored time and setting it to a normal ventilation position. .