JP3099560B2 - Damper position setting device for total heat exchange ventilator - Google Patents

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 ventilator which can be switched 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 has been used to switch one of a supply path and an exhaust path to provide
In the heat exchanger, a total heat exchange ventilation mode in which ventilation is performed while performing heat exchange between air supply and exhaust, and ventilation without heat exchange by bypassing the heat exchanger in either air supply or exhaust There is proposed a total heat exchange ventilator which can be switched to a normal ventilation mode for performing the heat exchange. FIG. 26 shows the electrical configuration of this total heat exchange ventilation apparatus.

[0003] As shown in FIG.
A control circuit M for determining a 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 for turning on the damper motor DM based on the ventilation mode determination signal of the circuit M, and a limit for detecting the total heat exchange ventilation position of the damper and turning off the damper motor DM to set the damper to the total heat exchange ventilation position. Switch LS
1 and the damper motor DM is turned off to detect the normal ventilation position of the damper and to set the damper to the normal ventilation position.
An F limit switch LS2 and a power supply V are provided.

[0004] The limit switch LS1 is shown in FIG.
As shown in (b), it is in contact with a cam 13 having 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 disposed below the limit switch LS1, and is phase-shifted by 180 degrees 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 disposed opposite thereto, and turns off when the recess 14a of the cam 14 is detected.

In the switching operation of the ventilation mode of the total heat exchange ventilator, as shown in a flowchart of FIG. 27, in step S1, the control circuit M sets the ventilation mode to the total heat exchange ventilation based on the ventilation mode switching signal. Mode or normal ventilation mode. Here, if 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.
To turn on the damper motor DM. And step S
In step 4, when the limit switch LS1 detects the total heat exchange ventilation position of the damper and turns off, the damper motor DM turns off in step S5, and the setting of the damper to the total heat exchange ventilation position ends in step S6.

On the other hand, if it is determined in step S1 that the set ventilation mode is the normal ventilation mode, the process proceeds to steps S7 and S8, where 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 on in step S10.
Is turned off, and the setting of the damper to the normal ventilation position ends 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 half-turning the cams 13 and 14 by the damper motor DM.
F, and 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.
Is not taken into the control circuit M, the damper motor, the relay,
Abnormal states such as failure of limit switches and wire harnesses could not be detected. In addition, the actual position of the damper cannot be confirmed for the most important switching of the ventilation mode for the total heat exchange ventilator, and no backup function is provided.

[0009] Therefore, for example, the element is frozen in winter due to not being in the total heat exchange ventilation mode operation, or the inside of the apparatus is not being caused due to not being in the ventilation mode operation according to the set ventilation mode. Pests can invade and smoke backflow can occur. The present invention
In view of the above, it is an object of the present invention to provide a damper position setting device of a total heat exchange ventilator that can detect an abnormality such as a damper position when switching the ventilation mode and can surely 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 heat exchanger including a total heat exchange ventilation mode for performing ventilation while performing heat exchange between supply air and exhaust air. The damper attached to the total heat exchange ventilator is switched by switching the damper between the total heat exchange ventilation position and the normal ventilation position by switching the normal ventilation mode to bypass the exchanger and perform ventilation without performing heat exchange. In the position setting device, the damper position detecting means for respectively detecting the total heat exchange ventilation position and the normal ventilation position of the damper and outputting the detection signal, and the ventilation mode is changed from the normal ventilation mode to the total heat exchange ventilation mode, and the total heat exchange. When switching from the ventilation mode to the normal ventilation mode, the ventilation position is detected by the damper position detection means even if a predetermined time has elapsed after receiving a signal related to the switching. When the detection signal of is not output,
It includes an abnormality determination unit that determines that the ventilation position cannot be detected by the damper position detection unit.

According to a second aspect of the present invention, there is provided a damper position setting device for a total heat exchange ventilator according to the first aspect, further comprising: a ventilation mode storing means for storing the set ventilation mode; A first required time storage unit for storing in advance a first required time required for switching the position of the damper when the mode is switched from the total heat exchange ventilation mode to the total heat exchange ventilation mode; A second required time storing means for storing in advance a second required time required for switching the position of the damper when switching to the mode, and a damper position detecting means for driving the damper to switch the ventilation mode; The time required for detecting the total heat exchange ventilation position and the normal ventilation position of the damper, and the first required time storage means and the second time.
Stored in the required time storage means.
And the second travel time,
When the damper position detection time matches the first required time, it is determined that the position of the damper is the total heat exchange ventilation position, and when the damper position detection time matches the second required time, the position of the damper is determined. Is a normal ventilation position, and the position of the damper determined by the damper position determination means is compared with the ventilation mode stored in the ventilation mode storage means. When the position of the damper coincides with the ventilation mode, the position setting of the damper is terminated, and when the position of the damper does not coincide with the ventilation mode, a damper position confirming means for re-driving the damper is provided so as to make them coincide with each other. Things.

A third aspect of the present invention provides a total heat exchange ventilation mode in which a heat exchanger performs ventilation while performing heat exchange between supply air and exhaust gas, and a heat exchange method in which the heat exchanger is bypassed. In the damper position setting device attached to the total heat exchange ventilation device which is switched by switching the damper between the total heat exchange ventilation position and the normal ventilation position, the switching to the normal ventilation mode for performing ventilation without performing the A first damper position detecting means for detecting a heat exchange ventilation position and outputting the detection signal; a second damper position detecting means for detecting a normal ventilation position of the damper and outputting the detection signal; When switching from the heat exchange mode to the total heat exchange ventilation mode, the first damper position detecting means performs the total heat exchange exchange 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 determining means for determining that the detection of the total heat exchange ventilation position by the first damper position detecting means is impossible, and the ventilation mode is normally changed from the total heat exchange ventilation mode. When switching to the ventilation mode, after receiving a signal related to the switching, even if a predetermined second predetermined time has elapsed,
When the detection signal of the normal ventilation position is not outputted from the second damper position detection means, the second damper position detection means includes a second abnormality determination means for determining that the detection of the normal ventilation position is impossible.

According to a fourth aspect of the present invention, there is provided a device for solving a problem.
In the damper position setting device for a total heat exchange ventilation apparatus described above, a 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 for storing 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; Means, when it is determined by the first abnormality determining means that the detection of the total heat exchange ventilation position by the first damper position detecting means cannot be performed, the normal damping position is detected by the second damper position detecting means. Then, the first backup control means for driving the damper for the first required time stored in the first required time storage means and setting the total heat exchange ventilation position, 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. A second backup control means for driving the damper for the second required time stored in the required time storage means and setting 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, even if a predetermined time elapses, when the detection signal of the ventilation position is not output from the damper position detection means,
It is determined that the ventilation position cannot be detected by the damper position detection means. Thereby, the position of the damper or its defect can be recognized.

In the second aspect, the time required for the damper position detecting means to detect the total heat exchange ventilation position and the normal ventilation position of the damper by the damper position determining means after driving the damper to switch the ventilation mode. When,
The first required time and the second required time stored respectively by the first required time storage means and the second required time storage means 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 position of the damper is the total heat exchange ventilation position,
When the damper position detection time matches the second required time, it is determined that the position of the damper is the normal ventilation position.

When the determination of the damper position is completed, the damper position confirmation means compares the position of the damper 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 coincides with the ventilation mode, the position setting of the damper is ended, and when the damper position does not coincide with the ventilation mode, the damper is re-driven so as to match them, The position of the damper can be confirmed, and the damper can be reliably set to a desired ventilation position.

In the means for solving problems 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 a signal related to the switching and determines a predetermined abnormality. If the detection signal of the total heat exchange ventilation position is not output from the first damper position detection means even after the predetermined time of 1, the detection of the total heat exchange ventilation position by the first damper position detection means is impossible. Since it is determined that there is, it is possible to detect a defect or the like of the first damper position detecting means.

On the other hand, when the ventilation mode switches from the total heat exchange ventilation mode to the normal ventilation mode, the second abnormality determining means passes a second predetermined time after receiving a signal relating to the switching. However, when the detection signal of the normal ventilation position is not output from the second damper position detecting means, it is determined that the normal ventilation position cannot be detected by the second damper position detecting means. Defective detection means can be detected.

In the present invention, when the first abnormality judging means judges that the detection of the total heat exchange ventilation position by the first damper position detecting means is impossible, the first backup control means sets the first backup control means. Since the normal ventilation position is detected by the damper position detection means 2 and the damper is driven only 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 normal ventilation position cannot be detected by the second damper position detecting means, the second backup control means performs the first damper position detection. Means detects the total heat exchange ventilation position, and thereafter drives 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 now be described with reference to FIGS.
3 will be described in detail. The same functional components as those in the conventional technology shown in FIG. 26 are denoted by the same reference numerals. FIG.
1 is a cross-sectional plan view of a total heat exchange ventilation apparatus according to a first embodiment of the present invention, and FIG. 12 is a vertical sectional side view of the same. The total heat exchange ventilation device according to the present embodiment will be described with reference to FIGS.

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

Further, as shown in FIG.
A bypass passage P bypassing the air supply path R1, the exhaust path R2, and the heat exchanger 4 is formed. The outside air temperature sensor 6 and the room temperature sensor 7 use a temperature detecting element such as a thermistor. The outside air temperature sensor 6 is arranged near the connection with the duct 8, and the room temperature sensor 7 is arranged near the connection with the duct 9.

FIGS. 13A and 13B show the configuration of the damper switching mechanism. FIG. 13A is a plan view and FIG. 13B is a side view. The configuration of the damper switching mechanism 5 will be described with reference to FIGS. Damper switching mechanism 5
As shown in FIGS. 13A and 13B, the damper 11 is rotatably supported around the vertical axis 10 and switches the flow of indoor air.
And a damper motor DM for rotating the damper 11 to switch the damper 11 between a total heat exchange ventilation position and a normal ventilation position.
And one cam 13 attached so as to rotate synchronously counterclockwise 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 cam 13, and comes into contact with the connecting rod 15 connecting the damper 11 and the cam 13 and the side peripheral surface of the cam 13 One limit switch LS1 that detects the total heat exchange ventilation position and the normal ventilation position of the damper 11 and outputs the detection signal.

At a predetermined position on the side peripheral surface of the cam 13, FIG.
As shown in (a), a recess 13a for detecting that the damper 11 has rotated to the total heat exchange ventilation position is provided. In addition, one side of 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. Further, the recess 13 on the side peripheral surface of the cam 13
a and an intermediate position between the recesses 13b, that is, the recesses 13a, 1
At a position shifted by 90 degrees from 3b, a recess 13c is provided for the damper 11 to detect an intermediate position between the total heat exchange position and the normal ventilation position (hereinafter, simply referred to as "intermediate position"). As described above, the recess 13c for detecting the intermediate position is provided by the recess 13a for detecting the total heat exchange ventilation position and the recess 1c for detecting the normal ventilation position.
3b are disposed 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 passes through the depression 13c for detecting the intermediate position and then contacts the depression 13a for detecting the total heat exchange ventilation position. However, when switching from the total heat exchange ventilation position to the normal ventilation position, the limit switch LS1 always comes into contact with the depression 13b for detecting the normal ventilation position without passing through the depression 13c for detecting the intermediate position, and the damper 11 is moved. This is so that it is possible to determine which ventilation position has been switched. Incidentally, if the recesses 13a and 13b are not arranged at positions facing each other by 180 degrees, the recess 13c is of course unnecessary.

The limit switch LS1 is configured to be turned off when it comes into contact with the recesses 13a, 13b, and 13c of the cam 13, and to be turned on 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 the total heat exchange ventilation position is detected.
When switching from the total heat exchange ventilation position to the normal ventilation position, a signal is output until the normal ventilation position is detected.
It outputs an OFF signal only once.

In the damper switching mechanism 5, depending on how many times the limit switch LS1 is switched from ON to OFF during the half rotation of the cam 13 by the damper motor DM, the damper 11 is switched to the full 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 represents a CPU and a data RA.
M, a control circuit including a microcomputer having a program ROM and the like, which controls according to a program stored in the ROM in advance. As shown in FIG. 1, the control circuit M is provided with an outside air temperature sensor 6, a room temperature sensor 7, an output signal from the limit switch LS1, and an operation signal from the remote control switch 16, and based on the output signal and the operation signal. ON / OFF of the relay RY1 for controlling the energization of the damper motor DM and the lighting of the alarm lamp LAMP.

Specifically, the control circuit M determines whether switching of the set ventilation mode is selected based on the output signal 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 switching of the set ventilation mode 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), the relay RY determines 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.
1 has a function of setting the damper 11 to the predetermined position by turning off the switch.

The control circuit M has a function of preliminarily storing a rotation time required for the cam 13 to make one rotation. The ventilation mode is changed 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 switching to mode,
Even after 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 detection of the ventilation position by the limit switch LS1 is impossible (hereinafter, referred to as “OFF detection impossible”) and the function of detecting the OFF detection of the limit switch LS1. When it is determined that there is, the alarm lamp LA
It has a function of turning on the MP to notify that the limit switch LS1 cannot be detected as OFF.

Further, the control circuit M has a function of storing the set ventilation mode, and a first predetermined time required for switching the damper 11 when the ventilation mode is switched from the normal ventilation mode to the total heat exchange ventilation mode. Is stored in advance, the second predetermined time required 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 is switched. After the damper 11 is driven, the time required for the limit switch LS1 to detect the ventilation position of the damper 11 is compared with the first predetermined time and the second predetermined time, and the ventilation of the damper 11 is performed. Function to determine the position,
When the determined ventilation position of the damper 11 matches the ventilation mode, the relay RY1 is turned off.
When the position setting of the damper 11 is finished and the determined ventilation position of the damper 11 does not match the ventilation mode, the relay RY1 is turned on to make them match.
N to re-drive the damper 11.

FIG. 2 is a flowchart showing the flow of the switching operation of the ventilation mode, FIG. 3 is a flowchart showing the continuation of FIG. 2, and 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 at the time of total heat exchange ventilation mode setting, FIG. 7 is a diagram showing a damper position detection pattern of the limit switch, and FIG. FIG. 9 is a diagram showing a damper position detection pattern of the limit switch.

First, the flow of operation at the start of damper setting will be described with reference to FIGS. FIG.
, After the activation of the total heat exchange ventilator, step S1
When it is determined that the ventilation mode, that is, switching of the damper 11, is selected in step S2, it is determined whether or not the ventilation mode selected in step S2 is a total heat exchange ventilation mode. here,
If the total heat exchange ventilation mode is selected, step S3
Sets the ventilation flag DIS to 1. On the other hand, if the normal ventilation mode has been 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 matches the damper flag DIF. If the ventilation flag DIS and the damper flag DIF match, the setting of the damper 11 ends, 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 turned off, step S1 shown in FIG.
It is input to the third and subsequent steps. On the other hand, if the limit switch LS1 is ON, in step S9, FIG.
As shown by the solid line in (a) and (b), the relay RY1 is turned on.
Then, 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), the motor time count DMTM is cleared, and the process proceeds to steps S10 and S11. The OFF detection signal from the limit switch LS1 is controlled within the motor drive time DMTS, that is, during one rotation of the cam 13. It is determined whether the signal is input to the circuit M or not.

At step S10, as shown by the solid line in FIG.
When 1 is turned off, the flow goes to the steps from step S13. On the other hand, in step S11, DMTS =
At the time when 30 seconds have elapsed, as shown by the dotted line in FIG. 5B, if there is no OFF detection of the limit switch LS1,
It is determined that the OFF detection cannot be performed, and an abnormality process is performed in step S12. At this time, as shown by a dotted line in FIG.
The warning lamp LAMP is turned on, and the OFF detection is notified.

With reference to FIGS. 3 and 4 and FIGS. 6 and 7, an operation flow when the damper 11 is set to the total heat exchange ventilation position will be described. First, in steps S8 and S10 shown in FIG. 2, it is assumed that the damper 11 is in the normal ventilation position, as shown by (a) in FIG. Referring to FIG. 3, when the process proceeds to step S13, relay RY1 is turned on, motor drive time DMTS is set to 30 seconds, motor time count DMTM is cleared, and damper 11 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 in S (during one rotation of the cam 13).

In step S14, as shown by the solid line in FIG. 6A, when the limit switch LS1 is turned off within DMTS time seconds, the motor time count DMTM is turned on and the limit switch LS1 is turned on in step S16.
Is stored as a first time (hereinafter, referred to as a “first OFF detection time”) DMT1 until switching from DMT to OFF,
Move to step S17. Here, as shown in FIG. 7A, since the limit switch LS1 detects the total heat exchange ventilation position, the first OFF detection time DMT1 =
T2 is stored. On the other hand, in step S15, when the motor drive time DMTS has elapsed, as shown by the dotted line in FIG.
If there is no FF detection, it is determined that the OFF detection is impossible, and FIG.
(A), as indicated by the dotted line, after turning on the alarm lamp LAMP, 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 is set to 30 seconds, 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, in step S20, the motor time count DMTM is set to the limit switch LS
It is stored as a second time (hereinafter, referred to as a "second OFF detection time") DMT2 until 1 switches from ON to OFF, and is input to steps after step S21 shown in FIG. Here, as shown by (a) in FIG. 7A, since the limit switch LS1 detects the intermediate position,
Is stored as DMT2 = T1 (<T2). On the other hand, in step S15, the motor driving time D
When the MTS has elapsed, if there is no OFF detection of the limit switch LS1, as shown by the dotted line in FIG. 6A, it is determined that the OFF detection is not possible, and as shown by the dotted line in FIG. After turning on the LAMP, abnormal processing is performed in step S12.

When entering the steps shown in FIG.
21, the second OFF detection time DMT2 = first
It is determined whether or not it is the OFF detection time DMT1 in 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), none of the above-mentioned relations is satisfied, so the flow shifts to step S23.

In step S23, as shown by (a) in FIG. 6A, the relay RY1 is turned on, the motor drive time DMTS is set to 30 seconds, the motor time count DMTM is cleared, and in steps S24 and S25,
Within the motor drive time DMTS, the limit switch LS1
It is determined whether or not there is an OFF detection signal. In step S24, as shown by the solid line in FIG. 6A, the limit switch LS1 is turned off within the motor driving time DMTS.
When the flip-flop is turned on, as shown in FIG.
Is a normal ventilation position, so that 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 there is no OFF detection of the limit switch LS1, it is determined that the OFF detection is impossible, and FIG. Therefore, as shown by the dotted line, after turning on the alarm lamp LAMP, an abnormality process is performed in step S12.

In step S31, it is determined whether or not the damper flag DIF matches the ventilation flag DIS. Here, as shown in FIG. 6A, the damper flag DIF (= 2) and the ventilation flag DIS
Since (= 1) does not match, the process shifts to step S33 to replace the first OFF detection time DMT1 with the second OFF detection time DMT2. That is, the first OFF
It is assumed that 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 turns on the relay RY1 as shown by (a) in FIG.
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 there is an FF detection signal.

In step S18, as shown by the solid line in FIG. 6A, when the limit switch LS1 is turned off within the DMTS time seconds, in step S20, FIG.
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), in step S27, the damper flag DIF is set to 1 corresponding to the total heat exchange ventilation position, and the process proceeds to step S28.

In step S28, as shown by (a) in FIG. 6, the damper flag DIF (= 1) matches the ventilation flag DIS (= 1).
At 9 it is determined that the setting of the damper has been completed, and the setting of the damper is completed. Next, in steps S8 and S10 shown in FIG. 2, it is assumed that the damper 11 is located at the intermediate position as shown in FIG. 7B. Referring to FIG. 3, step S14
When the limit switch LS1 is turned off within the motor drive time DMTS as shown by a solid line in FIG. 6B, in step S16, the limit switch LS1 detects the normal ventilation position as shown in FIG. 7B. Therefore, the first OFF detection time DMT1 = T1 is stored. Then, in step S18, as shown by the solid line in FIG. 6B, when the limit switch LS1 is turned off within the motor drive time DMTS, in step S20, the limit switch LS1 is fully turned off, as shown in FIG. 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
22, the second OFF detection time DMT2 (T2)> first
, The damper flag DIF is set to 1 in step S27. Then, as shown in FIG. 6B, the damper flag DIF (= 1) matches the ventilation flag DIS (= 1) in step S28, so that it is determined in step S29 that the setting of the damper has been completed.

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

Then, referring to FIG. 4, step S
21, the second OFF detection time DMT1 (T1) = first
Is determined as DMT2 (T1), the damper flag DIF is set to 2 in step S26. Then, in step S31, as shown in FIG. 6C, the damper flag DIF (= 2) and the ventilation flag DIS (= 1) do not match, so the first OFF detection time DMT1 is set in step S33. 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 returns to step S18 in FIG. 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, as shown in FIG. 7A, the limit switch LS1 detects the total heat exchange ventilation position, so that the second OFF detection time DMT2 = T2 is stored.

Then, referring to FIG. 4, step S
22, the second OFF detection time DMT2 (T2)> first
, The damper flag DIF is set to 1 in step S27. Then, in step S28, as shown in FIG. 6C, the damper flag DIF (= 1) matches the ventilation flag DIS (= 1), so that it is determined in step S29 that the setting of the damper has been completed.

With reference to FIGS. 3, 4, 8 and 9, the flow of operation when the damper 11 is set to the normal ventilation position will be described. First, step S shown in FIG.
8, at S10, as shown in FIG.
Assume that 1 is in the total heat exchange ventilation position. Referring to FIG. 3, when the limit switch LS1 is turned off within the motor drive time DMTS as shown by a solid line in FIG. 8A in step S14, as shown in FIG. Limit switch L
Since S1 detects the intermediate position, the first OFF detection time DMT1 = T1 is stored. Then, step S18
When the limit switch LS1 is turned off within the motor drive time DMTS as shown by the solid line in FIG. 8A, the limit switch LS1 detects the normal ventilation position in step S20, as shown by FIG. 9A. 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
Is determined to be the OFF detection time DMT1 (T1), the damper flag DIF is set to 2 in step S26. Then, in step S31, FIG.
Since the damper flag DIF (= 2) matches the ventilation flag DIS (= 2), it is determined in step S32 that the setting of the damper has been completed.

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

Then, referring to FIG. 4, step S
22, the second OFF detection time DMT2 (T2)> first
, The damper flag DIF is set to 1 in step S27. Then, in step S28, as shown by (b) in FIG. 8, the damper flag DIF (= 1) does not match the ventilation flag DIS (= 2), so the flow returns to step S13 in FIG. 3 again.

Then, referring to FIG. 3, step S14
When the limit switch LS1 is turned off within the motor drive time DMTS as shown by the solid line in FIG. 8B, the intermediate position is detected in step S16 as shown in FIG. 1 OFF detection time DMT1 = T1 is stored. Then, step S18
When the limit switch LS1 is turned off within the motor drive time DMTS as shown by the solid line in FIG. 8B, in step S20, the limit switch LS1 is set to the total heat exchange ventilation position as shown by 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
Is determined to be the OFF detection time DMT1 (T1), the damper flag DIF is set to 2 in step S26. Then, in step S31, FIG.
Since the damper flag DIF (= 2) matches the ventilation flag DIS (= 2), it is determined in step S32 that the setting of the damper has been completed.

Subsequently, steps S8 and S1 shown in FIG.
At 0, it is assumed that the damper 11 is in the normal ventilation position as shown by (c) in FIG. Referring to FIG. 3, in step S14, as shown by the solid line in FIG. 8C, limit switch LS is set within motor drive time DMTS.
When 1 is turned off, in step S16, FIG.
As shown 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. 8C, when the limit switch LS1 is turned off within the motor driving time DMTS, in step S20, as shown by the solid line in FIG.
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 condition of steps S21 and S22 is not satisfied, and the process shifts to step S23. Step S
23, after the limit switch LS1 is turned off within the motor drive time DMTS as shown by the solid line in FIG.
In FIG. 9, as shown in FIG. 9C, the normal ventilation position is detected, so that the damper flag DIF is set to 2. Then, in step S31, the damper flag DIF (= 2) matches the ventilation flag DIS (= 2), as shown by (c) in FIG.
At 32, it is determined that the setting of the damper has been completed.

FIG. 10 is a flowchart showing the abnormality processing operation. The abnormality processing operation will be described with reference to FIG. When input to the abnormality processing operation, step S3
In step 4, an 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 the present 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 detection signal (OFF detection signal) of the ventilation position is not output from the limit switch LS1 even after a predetermined time has elapsed after receiving the signal related to the switching, the detection of the ventilation position by the limit switch LS1. Is determined to be impossible, it is possible to detect a defect of 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 take measures. Furthermore, when the set ventilation mode and the ventilation mode are switched from the normal ventilation mode to the total heat exchange ventilation mode, the first required time required for switching the position of the damper 11 and the ventilation mode are changed 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 is turned on.
By comparing the time required to detect the ventilation position with the first required time and the second required time, the ventilation position of the damper 11 is determined. When the ventilation position is compared with the stored ventilation mode, if the ventilation position of the damper 11 matches the ventilation mode, the position setting of the damper 11 ends, and the ventilation position of the damper 11 matches the ventilation mode. If not, the damper 11 is driven again in order 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. The damper position setting device of the total heat exchange ventilator 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 of the limit switches LS1, L
When the OFF detection of S2 is not detected and one of the limit switches is disabled, the ventilation position of the damper 11 is set only by the other limit switch.

FIG. 25 shows the configuration of the damper switching mechanism of the total heat exchange ventilator according to the second embodiment of the present invention. FIG. 25 (a) is a plan view and FIG. 25 (b) is a side view. It is.
The configuration of the damper switching mechanism 5 of the total heat exchange ventilator according to the present embodiment will be described with reference to FIGS. As shown in FIGS. 25A and 25B, the damper switching mechanism 5 of the total heat exchange ventilator according to the present embodiment rotates the damper 11, the damper 11, and the damper motor DM and the motor shaft 12 of the damper motor DM. And a second cam 14 disposed below the first cam 13 and mounted to rotate synchronously with 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.
A first limit switch LS1 that contacts the connecting rod 15 that connects the first cam 13 and the side peripheral surface of the first cam 13, detects the total heat exchange ventilation position of the damper 11, and outputs the detection signal. And a second limit switch LS2 which comes into contact with the side peripheral surface of the second cam 14, detects the ordinary 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 13a for detecting that the damper 11 has rotated to the total heat exchange ventilation position is provided, and the side surface of the second cam 14 is provided with respect to the recess 13a. A depression 1 for detecting that the damper 11 has rotated to the normal ventilation position is provided at the opposing position that is 180 degrees out of phase.
4a is provided.

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

In the damper switching mechanism 5, the limit switches LS1 and LS2 are alternately turned ON / OFF by half-turning the cams 13 and 14 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 an electrical configuration of the damper position setting device in the total heat exchange ventilation device according to the present embodiment. The electrical configuration of the damper position setting device in the total heat exchange ventilation device will be described with reference to FIG.

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

More specifically, the control circuit M determines whether or not the switching of the set ventilation mode has been selected based on the output signals of the outside temperature sensor 6 and the room temperature sensor 7 or the operation signal from the remote control switch 16. The ability to
When it is determined that switching of the set ventilation mode has been selected, a ventilation mode switching signal is output to turn on relay RY1.
And the function of driving the damper motor DM based on the OFF signal from the first limit switch LS1.
1 is determined to have rotated to the total heat exchange ventilation position, and the relay R
Based on the function of turning off Y1 to set 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. And damper 11
Is set to the normal ventilation position.

Further, the control circuit M is provided with the cams 13 and 14 in advance.
Function to store the rotation time required for one rotation of the
When the ventilation mode is switched 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, the function of determining that the detection of the total heat exchange ventilation position by the limit switch LS1 is impossible (OFF detection is impossible), and the ventilation mode is changed from the total heat exchange ventilation mode to the normal ventilation When switching to the mode, when the OFF signal of the first limit switch LS1 is input and the OFF signal is not input from the second limit switch LS2 even after the required time elapses, the normal operation by the limit switch LS2 is performed. A function for determining that the detection of the ventilation position is impossible (OFF detection is impossible), and each limit switch LS
1 and LS2 are determined to be incapable of OFF detection,
Turn on the alarm lamp LAMP to turn on each limit switch LS
1 and a function of notifying that the LS2 cannot be detected OFF.

Further, when the control circuit M determines that the OFF detection of the first limit switch LS1 is not possible, the control circuit M first detects the OFF detection of the second limit switch LS2 and confirms the normal ventilation position. A backup function using only the second limit switch LS2, which rotates the damper 11 to the total heat exchange ventilation position by rotating the damper 11 by a half turn.
When it is determined that the OFF detection of the second limit switch LS2 is not possible, 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, 14 are rotated half a turn. A backup function is provided only by the first limit switch LS1, which sets the damper 11 to the normal ventilation position.

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

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 set. If selected, the ventilation flag DI
Set S to 2. At this time, the control circuit M turns on the relay RY1 to drive the damper motor DM to switch the ventilation mode. Here, the ventilation flag DIS is 1
Assuming the case of being set to, it is determined in step S2 whether or not the damper 11 has rotated to the total heat exchange ventilation position. That is, as shown in FIGS. 16 (c), (d) and (e),
The control circuit M outputs the OF signal from the first limit switch LS1.
When the F signal is input, the relay RY1 is turned off to stop the damper motor DM, and the process proceeds to step S5, where the damper flag DIF is set to 1. Then, in step S7, the ventilation flag DIS and the damper flag DIF
Is determined as to whether or not. Here, FIG.
If the ventilation flag DIS matches the damper flag DIF as in (a) and (b), it is determined in step S8 that the setting of total heat exchange ventilation has been completed.

Next, at step S1, the ventilation flag DIS is set.
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, as shown in FIGS. 16C, 16D and 16E, when 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, and the process proceeds to step S6, where the damper flag DIF is set to 2. Then, in a step S7, it is determined whether or not the ventilation flag DIS matches the damper flag DIF. 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 the normal ventilation has been completed.

If it is determined in step S7 that the ventilation flag DIS does not match the damper flag DIF, the process proceeds to step S9. If the limit switches LS1 and LS2 are not detected OFF in steps S2 and S3 even though the ventilation flag DIS is set to either 1 or 2 in step S1,
In step S4, the damper flag DIF is set to 0, and the flow shifts to step S9.

At step S9, the 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
The operation enters the OFF detection disable detection operation 2. FIG. 17 is a flowchart showing an operation for detecting the OFF detection of the limit switches LS1 and LS2, FIG. 18 is a timing chart showing an operation for detecting the OFF detection of the limit switch LS1, and FIG. 19 is a timing showing the operation for detecting the OFF detection of the limit switch LS2. It is a chart. 17 to 1
9 while the limit switches LS1 and LS2
The FF detection impossible detection operation will be described.

Referring to FIG. 17, first, assuming that it is detected whether or not the OFF detection of first limit switch LS1 is impossible, in step S11, cams 13 and 1 are detected.
First, during the rotation of the first limit switch LS, the first limit switch LS
In step 1, it is determined whether the total heat exchange ventilation position is detected. That is, as shown by the dotted lines 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 OFF.
FF is performed to stop the damper motor DM, the process proceeds to step S12, the damper flag DIF is set to 1, and the OFF detection count LSTS is incremented by one.
Then, in step S14, it is determined whether or not the ventilation flag DIS matches the damper flag DIF. Here, as shown by the dotted lines in FIGS.
If the ventilation flag DIS matches the damper flag DIF, it is determined in step S15 that the setting of the total heat exchange ventilation has been completed.

On the other hand, in step S10, FIG.
As shown by the solid line in (e), while the cams 13 and 14 make one rotation, the OFF signal from the limit switch LS1 is not input first, and the second limit switch LS2 is sent to the control circuit M in step S11. , 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 decremented by one. And step S
In FIG. 14, since the ventilation flag DIS and the damper flag DIF do not coincide with each other as shown by the solid line in FIGS. 18A and 18B, the flow returns to step S10 again, 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 previously input to the control circuit M, in step S14, as shown by the dotted lines in FIGS. 18A and 18B, the ventilation flag DIS and the damper flag DI
Since F matches, it is determined in step S15 that the setting of the total heat exchange ventilation has been completed. On the other hand, first, in step S10, the OF from the first limit switch LS1 is turned off.
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.
Set IF to 2 and OFF detection count L
STS is further counted down by -1. And step S
At step S18, the OFF detection count LSTS has become -2 counts.
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 only by the second limit switch LS2. At this time, the alarm lamp LAMP is turned on as shown in FIG.
(Lit) to notify that the OFF detection by the limit switch LS1 is not possible.

Next, the O of the second limit switch LS2 is
Assuming that it is detected whether or not FF detection is impossible, it is determined in step S11 whether the normal ventilation position is first detected by the second limit switch LS2 while the cams 13 and 14 make one rotation. Determine. That is, FIG.
(D) As shown by the dotted line in (e), first, in step S11
When the OFF signal from the second limit switch LS2 is input to the control circuit M, the relay RY1 is turned off.
To stop the damper motor DM, proceed to step S13, set the damper flag DIF to 2, and
The FF detection count LSTS is counted down by -1. Then, in step S14, it is determined whether the ventilation flag DIS matches the damper flag DIF. Here, as shown by the dotted lines in FIGS. 18A and 18B, if the ventilation flag DIS matches the damper flag DIF,
In step S15, it is determined that the setting of the normal ventilation has been completed.

On the other hand, in step S10, FIG.
As shown by the solid line in (e), while the cams 13 and 14 make one rotation, the OF from the first limit switch LS1 is first turned on.
When the F signal is input, the relay RY1 is turned off to stop the damper motor DM, and the process proceeds to step S12.
The damper flag DIF is set to 1, and the OFF detection count LSTS is incremented by one. Then, step S1
In FIG. 4, as shown by the solid lines in FIGS.
Naturally, since the ventilation flag DIS and the damper flag DIF do not match, the process returns to step S10, and the cams 13 and 14 are again rotated once more, and the normal ventilation position is detected first by the second limit switch LS2. Is determined. Here, if the OFF signal from the first limit switch LS1 is not input first in step S10, and if the OFF signal from the second limit switch LS2 is input to the control circuit M in step S11, In FIG. 14, the ventilation flag DIS and the damper flag DIF as shown by the dotted lines in FIGS.
Therefore, it is determined in step S15 that the setting of the normal ventilation has been completed. In contrast, step S10
If the OFF signal from the first limit switch LS1 is input first, in step S12, the damper flag DIF is set to 1 again, and the OFF detection count LSTS is further incremented by one. Since the OFF detection count LSTS is +2 in step S16, 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, the alarm lamp LAMP is turned on as shown in FIG.
Then, it notifies that the first limit switch LS1 cannot detect the OFF state.

In step S20, if the detection of OFF by both limit switches LS1 and LS2 is not confirmed when the motor drive time DMTS = 30 seconds has elapsed, the process proceeds to step S21 to perform an abnormal process. FIG. 20 is a flowchart showing a backup operation using only the limit switch LS2, and FIG. 21 is a timing chart thereof. A 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 by only 2, the cams 13 and 14 make one revolution in step S <b> 22, and the normal switch position is detected by the limit switch LS <b> 2 while the cams 13 and 14 make one revolution in step S <b> 23. It is determined whether 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 limit switch LS2 detects the normal ventilation position while the cams 13, 14 make one rotation. Here, if the normal ventilation position is detected by the limit switch LS2, the process proceeds to step S28, and as shown in FIGS. 21 (d) and (e), the total heat exchange ventilation position is set based on the normal ventilation position. The motor drive time DMTS is set to DMTS / 2 (15 seconds: half rotation of the cams 13, 14), the motor time count DMTM is cleared, and the damper motor DM is driven for backup. Then, in a step S29, it is determined whether or not the motor driving 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 half rotated, the process proceeds to step S30,
At that time, the damper motor DM is stopped. This allows
The damper 11 is set to the total heat exchange ventilation position as shown in FIG. Then, in step S31, it is determined that the setting of the total heat exchange ventilation using only the limit switch LS2 has been 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 abnormal processing is performed.
FIG. 22 is a flowchart showing a backup operation using only the limit switch LS1, and FIG. 23 is a timing chart thereof. The backup operation using only the limit switch LS1 will be described with reference to FIGS.

Referring to FIG. 22, limit switch LS
When the backup operation by only 1 is performed, in step S32, the cams 13 and 14 make one rotation, and in step S33, while the cams 13 and 14 make one rotation, the total heat exchange ventilation position is detected by the limit switch LS1. It is determined whether or not it is performed. Here, the limit switch LS1
If the total heat exchange ventilation position is detected by the step S3, step S3
Then, 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, 14 make one rotation. 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 normal heat exchange position is set based on the total heat exchange ventilation position. Therefore, the motor drive time DMTS is set to DMTS / 2 (15 seconds:
(For half rotation of the cams 13 and 14), the motor time count DMTM is cleared, and the damper motor DM is driven for backup. Then, in a step S39, 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 half rotated, 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
It is determined that the setting of the normal ventilation by only 1 has been completed.

In steps S34 and S37,
If the OFF detection by the limit switch LS1 is not confirmed at the time point when the motor drive time DMTS = 30 seconds has elapsed, the process proceeds to step S21, and abnormal 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 input to the abnormality processing operation, step S
At 42, an abnormal code corresponding to the defect is set in the limit switches LS1, LS2, and at step S43,
Forcibly stop ventilation operation. As described above, in the total heat exchange ventilation apparatus 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 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 determined to be impossible, the first limit switch L
A 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, after the OFF signal of the first limit switch LS1 is input, even if the required time has elapsed, the second limit switch LS2 does not operate. When the OFF signal is not input, it is determined that the normal switch position cannot be detected by the limit switch LS2.
S2 defects can be detected.

Further, each of the limit switches LS1, LS2
When it is determined that the position of the damper cannot be detected, the alarm lamp LAMP is turned on and each of the limit switches LS
Since the user is notified that the damper position cannot be detected in the LS1 and LS2, the user can easily know this and take necessary measures. Further, when it is determined that the OFF detection of the first limit switch LS1 is impossible, first, the second mitt switch L
Since the normal ventilation position is confirmed by detecting the OFF detection of S2, the cams 13 and 14 are then rotated half a turn to set the damper 11 to the full heat exchange ventilation position.
Backup by only S2 becomes possible.

On the other hand, 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.
Since 1 is set to the normal ventilation position, backup can be performed only by the first limit switch LS1. Note that the present invention is not limited to the above embodiment,
Of course, many changes and modifications may be made within the scope of the present invention.

For example, in the first embodiment, the cam 1
The three recesses 13a and 13b may be opposed to each other at a position other than 180 degrees, and may be arranged at a position other than this so that the OFF detection of the limit switch LS1 and the position confirmation of the damper may be performed. In the second embodiment, the limit switches LS1 and LS2 are alternately turned ON / OFF by half-turning the cams 13 and 14 by the damper motor DM to set the damper to the total heat exchange ventilation position and the normal ventilation position. Although the description has been given of the case where the present invention is applied to the damper switching mechanism 5,
Instead of making the recesses 3a and 14a face each other at a position 180 degrees out of phase with each other, the recesses 13a and 14a face each other at other positions.
The time from when a is detected until when the dent 14a is detected,
The time from when the dent 14a is detected to when the dent 13a is detected is stored, and each limit switch LS
1, LS2 may not be detected, and backup may be performed using only the limit switches LS1, LS2.

[0090]

As is apparent from the above description, according to the first aspect 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, the switching is performed. If the detection signal of the ventilation position is not output from the damper position detection means even after a predetermined time has elapsed after receiving the signal relating to the switching, it is determined that the detection of the ventilation position by the damper position detection means is impossible. Therefore, it is possible to determine a defect of the damper position detecting means.

In the second aspect, after the end of the damper position determination, the position of the damper 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 position setting of the damper ends,
When the damper position does not coincide with the ventilation mode, the damper is driven again to make them coincide with each other, 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 a predetermined first predetermined time elapses 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 detection means,
When it is determined that the total heat exchange ventilation position cannot be detected by the damper position detecting means, and when the ventilation mode switches from the total heat exchange ventilation mode to the normal ventilation mode, after receiving a signal related to the switching, When the detection signal of the normal ventilation position is not output from the second damper position detection means even after the predetermined second predetermined time has elapsed, it is determined that the detection of the normal ventilation position by the second damper position detection means is impossible. Since the determination is made, it is possible to detect a defect or the like of each damper position detecting means.

In the present invention, when the first determining means determines that the detection of the total heat exchange ventilation position by the first damper position detecting means is impossible, the first backup control means sets the second backup control means to 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 the second determining means determines that the normal damping position cannot be detected by the second damper position detecting means, the second backup control means causes the first damper position detecting means to perform total heat exchange. Since the ventilation position is detected and thereafter the damper is driven for the second required time stored in the second required time storage means and set to the normal ventilation position, backup by only each damper position detection means is possible. Become

[Brief description of the drawings]

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

FIG. 2 is a flowchart illustrating a switching operation of a ventilation mode.

FIG. 3 is a flowchart showing a continuation of FIG. 2;

FIG. 4 is a flowchart showing a continuation of FIG. 3;

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

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

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

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

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

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

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

FIG. 12 is a vertical sectional side view of the same.

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

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

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

FIG. 16 is a timing chart of the same.

FIG. 17 is a flowchart showing an operation of detecting that the limit switches LS1 and LS2 cannot be turned off.

FIG. 18 is a timing chart showing an operation of detecting that the limit switch LS1 is unable to detect OFF.

FIG. 19 is a timing chart illustrating an operation of detecting that the limit switch LS2 is unable to detect OFF.

FIG. 20 is a flowchart illustrating a backup operation using only the limit switch LS2.

FIG. 21 is a timing chart of the same.

FIG. 22 is a flowchart showing a backup operation using 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 the configuration 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 apparatus.

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

FIG. 28 is a timing chart of the same.

[Explanation of symbols]

 Reference Signs List 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

Continuation of the front page (56) References JP-A-5-256485 (JP, A) JP-A-61-295443 (JP, A) JP-A-3-211337 (JP, A) JP-A 64-33447 (JP) JP-A-59-210236 (JP, A) JP-A-62-86300 (JP, A) JP-A-3-1027 (JP, A) JP-A-4-18230 (JP, U) JP-A 58-150709 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F24F 7/007 F24F 7/08 101

Claims (4)

(57) [Claims] In a heat exchanger (4), a total heat exchange ventilation mode for performing ventilation 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 performing heat exchange is performed by the damper (1).
The damper (11) detects the total heat exchange ventilation position and the normal ventilation position of the damper (11) in the damper position setting device attached to the total heat exchange ventilation device that is switched to the total heat exchange ventilation position and the normal ventilation position. And a damper position detecting means (LS1) for outputting the detection signal, and a signal relating to the switching 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. If the detection signal of the ventilation position is not output from the damper position detection means (LS1) even after a predetermined time has passed after receiving the information, the detection of the ventilation position by the damper position detection means (LS1) is impossible. A damper position setting device for a total heat exchange ventilator, characterized by including an abnormality judging means for judging the condition. 2. A damper position setting device for a total heat exchange ventilator according to claim 1, further comprising: a ventilation mode storage means for storing a set ventilation mode, wherein the ventilation mode is changed from a normal ventilation mode to a total heat exchange ventilation mode. A first required time storage means for storing in advance a first required time required for switching the position of the damper (11) at the time of switching, when the ventilation mode is switched from the total heat exchange ventilation mode to the normal ventilation mode; A second required time storage means for storing in advance a second required time required for switching the position of the damper (11); and detecting the damper position after driving the damper (11) to switch the ventilation mode. The time required for the means (LS1) to detect the ventilation position of the damper (11), the first required time and the first required time stored in the first required time storage means and the second required time storage means, respectively. And comparing the required time with the damper position determining means for determining the ventilation position of the damper (11), the ventilation position of the damper (11) determined by the damper position determining means, and the ventilation mode storage means. Comparing with the stored ventilation mode, if the ventilation position of the damper (11) matches the ventilation mode, the position setting of the damper (11) ends, and the ventilation position of the damper (11) A damper position setting device for a total heat exchange ventilator, comprising: a damper position confirmation unit for re-driving the damper (11) so that when the ventilation mode and the ventilation mode do not match, the damper (11) is driven again. 3. A total heat exchange ventilation mode in which a heat exchanger (4) performs ventilation while performing heat exchange between air supply and exhaust air.
Switching to the normal ventilation mode in which the heat exchanger (4) is bypassed and ventilation is performed without performing heat exchange is performed by the damper (1).
In 1), the total heat exchange ventilation position of the damper (11) is detected by the damper position setting device attached to the total heat exchange ventilation device that is switched to the total heat exchange ventilation position and the normal ventilation position, and the detection signal The first damper position detecting means (LS1) which outputs the signal, the second damper position detecting means (LS2) which detects the normal ventilation position of the damper (11) and outputs the detection signal, and the ventilation mode is changed from the normal ventilation mode When switching to the total heat exchange ventilation mode, after receiving the signal related to the switch,
Even if the first predetermined time has elapsed, if the detection signal of the total heat exchange ventilation position is not output from the first damper position detection means (LS1), the first damper position detection means (LS1)
The first abnormality determination means for determining that the detection of the total heat exchange ventilation position by 1) is impossible, and a signal related to the switching when the ventilation mode switches from the total heat exchange ventilation mode to the normal ventilation mode. Thereafter, even if a second predetermined time has passed, the second damper position detecting means (LS2)
A second abnormality determining means for determining that the detection of the normal ventilation position by the second damper position detecting means (LS2) is impossible when the detection signal of the normal ventilation position is not output from the apparatus. Damper position setting device for heat exchange ventilator. 4. The damper position setting device for a total heat exchange ventilator according to claim 3, wherein the position of the damper (11) is required for switching the ventilation mode from the normal ventilation mode to the total heat exchange ventilation mode. A first required time storing means for storing a first required time in advance, 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 the required time in advance; first damper position detecting means by the first abnormality determining means;
When it is determined that the total heat exchange ventilation position cannot be detected by (LS1), the normal ventilation position is detected by the second damper position detection means (LS2), and then the first required time storage means. The first backup control means for driving the damper (11) for the stored first required time to set the total heat exchange ventilation position and the second damper position detection by the second abnormality determination means When it is determined that the normal ventilation position cannot be detected by the means (LS2), the total heat exchange ventilation position is detected by the first damper position detection means (LS1), and thereafter, the second required time storage means is used. A damper position setting device for a total heat exchange ventilator, comprising second backup control means for driving the damper (11) for the stored second required time and setting the damper (11) to the normal ventilation position. .