JPH0442580B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a heat exchange type ventilation device for ventilating a living room such as an office.

Conventional technology Conventionally, this type of heat exchange type ventilation device is shown in Fig. 9.
The configuration was as shown in FIG. That is, the main body 100 has an air supply passage 103 that communicates between the outdoor side suction port 101 and the indoor side discharge port 102, and an exhaust passage 106 that communicates the indoor side suction port 104 and the outdoor side discharge port 105. Further, inside, there are a heat exchange element 107 provided at the intersection of the air supply passage 103 and the exhaust passage 106, an air supply vane 108, an exhaust vane 109, and a motor 11 that rotates them.
It had 0. Furthermore, the main body 100 has a second exhaust passage 111 in parallel with the exhaust passage 106, and a heat exchange element 107 of the exhaust passage 106.
Branch portions 112 provided on the upstream and downstream sides and heat exchange element 1
07 was communicated with a confluence section 113 provided on the downstream side without using a heat exchange element 107. The branch part 11
2 is provided with a damper 114, which connects the indoor suction port 104 and the outdoor discharge port 105 to the heat exchange element 107, or connects the indoor suction port 104 and the outdoor discharge port 105 to the second exhaust gas. It selectively communicated with the passage 111. The damper 114 is operated by a damper motor 115. The damper 114 comes into contact with the limit switch A116, and specifically, comes into contact with the damper 114 when the indoor suction port 104 and the outdoor discharge port 105 are in communication with the heat exchange element 107. death,
The power supply to the damper motor 115 is released to stop the damper motor 115. In addition, the bumper 114 is a limit switch B11.
7, that is, when the indoor suction port 104 and the outdoor discharge port 105 are in communication with the second exhaust passage 111, the damper 114 contacts the damper motor 115. Open the power supply to the damper motor 11.
5 was stopped.

FIG. 10 shows the electric circuit of the damper motor 115 and the motor 110, 118 is the motor 1.
10 and a power switch for turning on and off the power to the damper motor 115, and 119 for switching the power to the limit switch A116 or the limit switch B1.
This is a damper operation switch that can be switched to 17.

In such a configuration, power switch 118
When the motor 110 is operated by turning on the air, outdoor air is sucked in from the outdoor suction port 101 as shown by the arrow u→u′, passes through the heat exchange element 107, and is supplied indoors from the indoor discharge port 102. is arrow v →
As shown in v', it is sucked in from the indoor suction port 104,
It passed through the heat exchange element 107 and was discharged to the outside from the outdoor discharge port 105. Furthermore, when the damper operation switch 119 is switched in this state, the damper 114 is operated by the damper motor 115, and the
It stops by contacting the limit switch B117 at the position and opening the power supply, and the indoor suction port 1
04 and the outdoor side discharge port 105 are in communication with the second exhaust passage, and the indoor air sucked from the indoor side suction port 104 is transferred to the heat exchange element 10 as indicated by the arrow w...→w'.
7, but from the branch part 112 to the second exhaust passage 1
11 and was discharged to the outside from the outdoor discharge port 105.

Problems to be Solved by the Invention In such a conventional configuration, the damper motor 1
Even when the damper 114 is operating due to the damper motor 115, the motor 110 continues to operate regardless of the damper motor 115, so the wind pressure of the exhaust vane 109 is applied to the damper 114, causing damage to the bearings and internal parts of the damper motor 115. There was a risk that the reduction gear that was being used would be damaged. Furthermore, in order to prevent this and to operate smoothly, a damper motor 115 having torque sufficient to overcome the wind pressure is required, which increases costs. Furthermore, as the volume of air processed by the product increases, it is necessary to use a damper motor 115 with a large torque, making it difficult to share and standardize parts.

The present invention solves these problems,
When the damper motor is in operation, the motor is stopped by opening the motor power, and the wind pressure from the exhaust vanes is not applied to the damper, thereby preventing damage to the damper motor.In addition, the damper motor is inexpensive and has low torque and can be used for various types of processing. The object of the present invention is to provide a heat exchange type ventilation device that can reliably change the damper depending on the air volume.

Means for Solving the Problem In order to solve this problem, the present invention provides an air supply passage that communicates an outdoor suction port and an indoor discharge port;
an exhaust passage that communicates the indoor suction port with the outdoor discharge port; a heat exchange element provided at the intersection of the air supply passage and the exhaust passage; and an air supply vane that blows air into the air supply passage; An exhaust vane that blows air into the exhaust passage, a motor that rotates them, a branch part of the exhaust passage provided on the upstream side of the heat exchange element, a confluence part provided on the downstream side of the heat exchange element, and the branch part. The main body is provided with a second exhaust passage that communicates with the merging portion without a heat exchange element, and the indoor suction port and the outdoor discharge port are connected to at least one of the branching portion and the merging portion. A damper that selectively communicates with the heat exchange element or between an upper air chamber inner suction port and an outdoor outlet outlet with the second exhaust passage, and a damper motor that operates the damper are provided, and a damper motor that operates the damper is provided. Connect the working coil of the relay in parallel with the NC of the above relay in series with the power supply of the above motor.
It is equipped with a contact point.

Effect With this configuration, when the damper is held in a position where the indoor suction port and the outdoor discharge port communicate with the heat exchange element and the motor is operated, the outdoor air sucked from the outdoor suction port by the air supply vanes is The air is supplied into the room through the air supply passage, through the heat exchange element, and from the indoor side discharge port, and the indoor air sucked in from the indoor side suction port by the exhaust vane passes through the exhaust passage, passes through the heat exchange element, and is released outdoors. When the damper is held at a position where the indoor suction port, the outdoor discharge port, and the second exhaust passage communicate with each other, and the motor is operated, the supply air The outdoor air taken in from the outdoor suction port by the vane passes through the air supply passage, passes through the heat exchange element, and is supplied indoors from the indoor discharge port.The indoor air sucked from the indoor suction port by the exhaust vane passes through the air supply passage and the heat exchange element. From the branch part, the air passes through the second exhaust passage and is discharged to the outside from the outdoor outlet, allowing ventilation without heat exchange. In addition, by rotating the damper motor while the motor is running, the damper can be moved from the position where the indoor suction port, the outdoor discharge port, and the heat exchange element communicate to the indoor suction port, the outdoor discharge port, and the second exhaust gas. When moving to a position where it communicates with the passage, or vice versa, power is supplied to the damper motor, and at the same time voltage is applied to the operating coil of the relay connected in parallel to the damper motor power supply, causing it to operate. , NC of the relay connected in series with the motor power supply
When the contacts open, the power to the motor is released and the motor stops.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 8. In the figure, reference numeral 1 denotes an air supply passage 4 that communicates an outdoor suction port 2 and an indoor discharge port 3;
The main body is provided with an exhaust passage 7 that communicates the indoor side suction port 5 and the outdoor side discharge port 6, and a heat exchange element 8 is provided inside at the intersection of the air supply passage 4 and the exhaust passage 7.
and an air supply blade 9 that blows air into the air supply passage 4,
It has exhaust vanes 10 that blow air into the exhaust passage 7, and a motor 11 that rotates these vanes. A second exhaust passage 12 is provided in the main body 1 in parallel with the exhaust passage 7, and a branch part 13 is provided in the exhaust passage 7 upstream of the heat exchange element 8, and a branch part 13 is provided in the exhaust passage 7 on the upstream side of the heat exchange element 8. The merging portion 14 is communicated with the merging portion 14 without using the heat exchange element 8. A damper 15 is provided in the branch portion 13, and the indoor suction port 5
and the outdoor side discharge port 6 and the heat exchange element 8,
Alternatively, the indoor suction port 5 and the outdoor discharge port 6 are selectively communicated with the second exhaust passage 12. The damper 15 is driven by a damper motor 16
It is now possible to operate it with

17 is a relay that operates in conjunction with the damper motor 16, the actuating coil 18 is connected in parallel with the power supply of the damper motor 16, and the NC contact 19 is connected to the motor 1.
Connected in series with power supply 1. Damper 1 above
5 is the indoor side suction port 5 and the outdoor side discharge port 6
When in communication with the heat exchange element 8, the limit switch A20 contacts the limit switch A20, and the limit switch A20 releases the power to the damper motor 16 to stop the damper motor 16. Further, the damper 15 is adapted to come into contact with a limit switch B21 when the indoor suction port 5 and the outdoor discharge port 6 are in communication with the second exhaust passage 12, and the limit switch B21 is connected to the damper motor. The damper motor 16 is stopped by opening the power source of the damper motor 16.
A power switch 22 is provided in the power circuit for the motor 11 and the damper motor 16, and a damper operation switch 23 is provided for switching the power to the limit switch A20 or the limit switch B21.

In the above configuration, as shown in FIGS. 1 and 2, the damper 15 provided at the branch part 13 is brought into contact with the limit switch A20, and the indoor suction port
Then, the outdoor side discharge port 6 and the heat exchange element 8 are communicated with each other, and the power switch 22 is turned on and the motor 11 is turned on.
When the is operated, outdoor air is sucked in from the outdoor suction port 2 as shown by arrows A→A', passes through the air supply passage 4, passes through the heat exchange element 8, and is supplied indoors from the indoor discharge port 3. Air is sucked in from the indoor suction port 5 as indicated by arrows B...→B', passes through the exhaust passage 7, passes through the branch portion 13 and the heat exchange element 8, and is discharged outdoors from the outdoor discharge port 6. At this time, the heat exchange element 8 exchanges heat between the outdoor air and the indoor air, making heat exchange ventilation possible. Furthermore, when the damper operation switch 23 is switched in this state, power is supplied to the damper motor 16 via the limit switch B21, and as shown in FIGS. 3 and 4, the damper 15 is rotated by the damper motor 16.
begins to move and comes out of contact with the limit switch A20, and the relay 17 is activated by applying voltage to the operating coil 18 at the same time as the damper motor 16 is activated, opening the NC contact 19 connected in series to the power source of the motor 11. As a result, the power to the motor 11 is released and the motor 11 is stopped. When a predetermined period of time has elapsed in this state and the damper 15 moves due to the rotation of the damper motor 16 and comes into contact with the limit switch B21 as shown in FIGS. 5 and 6, the contact point of the limit switch B21 is opened.
The power to the damper motor 16 is opened, the damper motor 16 stops, and at the same time, the power to the operating coil 18 of the relay 17 connected in parallel with the power to the damper motor 16 is also opened, and the CN connected in series with the power to the motor 11 is opened. When the contacts 19 come into contact, power is supplied to the motor 11, and the motor 11 starts operating. Then, the outdoor air is sucked in from the outdoor side suction port 2 as shown by arrow C→C', passes through the air supply passage 4, passes through the heat exchange element 8, and is supplied indoors from the indoor side discharge port 3. ...→D', the air is sucked in from the indoor suction port 5, passes through the second exhaust passage 12 from the branching part 13, passes through the merging part 14, and is discharged outdoors from the outdoor discharge port 6. At this time,
Since indoor air does not pass through the heat exchange element 8, ventilation without heat exchange is possible. Furthermore, when the damper operation switch 23 is switched in this state, the damper motor 16 is activated via the limit switch A20.
As shown in FIGS. 7 and 8, the damper 1 is
5 begins to move and comes out of contact with the limit switch B21, and the relay 17 is activated by applying voltage to the operating coil 18 at the same time as the damper motor 16 is activated, opening the NC contact 19 connected in series to the power source of the motor 11. This releases the power to the motor 11 and stops the motor.

As described above, according to this embodiment, the damper 15
When the motor 11 is operated with the heat exchange element 8 brought into contact with the limit switch A20 and the indoor suction port 5 and the outdoor discharge port 6 communicated with the heat exchange element 8, heat exchange ventilation by the heat exchange element 8 becomes possible, and the damper 15 in contact with limit switch B21,
When the motor 11 is operated with the indoor suction port 5 and the outdoor discharge port 6 communicating with the second exhaust passage 12, the indoor air does not pass through the heat exchange element 8, so ventilation without heat exchange is performed. It becomes possible. In addition, by rotating the damper motor 16 while the motor 11 is operating, the damper 15 is connected to the indoor suction port 5, the outdoor discharge port 6, and the heat exchange element 8.
When moving from a position where the indoor suction port 5 and the outdoor discharge port 6 communicate with the second exhaust passage 12, or vice versa, power is supplied to the damper motor 16. At the same time, voltage is applied to the operating coil 18 of the relay 17 connected in parallel with the power source of the damper motor 16 and the relay 17 connected in series with the power source of the motor 11 is activated.
When NC contact 19 of 7 opens, motor 1
1 is opened and the motor 11 is stopped, the wind pressure of the exhaust vanes 10 is not applied to the damper 15, and there is no fear that the bearing of the damper motor 16 or the built-in deceleration gear will be damaged. In addition, even if the processing air volume of the product increases, the damper motor 16
Since there is no need to increase the torque of the damper motor 16, the same damper motor 16 can be used for products with a small air volume to products with a large air volume, allowing parts to be shared and standardized, and costs to be reduced.

In this embodiment, the damper is moved from a position where the indoor suction port, the outdoor discharge port, and the heat exchange element communicate with each other to a position where the indoor suction port, the outdoor discharge port, and the second exhaust passage communicate with each other. In both cases of movement in the opposite direction, the damper motor was used for movement, but the indoor suction port, the outdoor discharge port, and the second
The movement of the damper from the position where it communicates with the exhaust passage to the position where the indoor suction port and outdoor discharge port communicate with the heat exchange element is performed by a damper motor, and the reverse movement is performed by the damper's own weight and a spring. Even if it ages, there will be no difference in its effects.

Effects of the Invention As is clear from the description of the embodiments described above, according to the present invention, when the damper motor is in operation, the motor is stopped by opening the power supply to the motor, and the wind pressure caused by the exhaust vanes is not applied to the damper. In addition to preventing damage to the motor, the damper can be reliably switched for various air flow rates using an inexpensive damper motor with low torque.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a heat exchange type ventilation system according to an embodiment of the present invention in which the indoor suction port and the outdoor discharge port are in communication with the heat exchange element, and FIG. 2 is the same heat exchange type ventilation device. Electrical circuit diagram of the device in the state shown in Figure 1, Figure 3
The figure is a cross-sectional view showing a state in which the damper of the heat exchange type ventilation device is moving from the state shown in Fig. 1 to a position where the indoor suction port, the outdoor discharge port, and the second exhaust passage communicate with each other. The figure is an electric circuit diagram of the heat exchange type ventilation system in the state shown in Figure 3, and Figure 5 shows the state in which the indoor suction port and outdoor outlet of the heat exchange type ventilation system are in communication with the second exhaust passage. Figure 6 is an electrical circuit diagram of the same heat exchange type ventilation system in the state shown in Figure 5, and Figure 7 shows the damper of the same heat exchange type ventilation system in the state shown in Figure 1 compared to the state shown in Figure 5. A cross-sectional view showing the state in progress, Figure 8 is the 7th section of the heat exchange type ventilation system.
FIG. 9 is a sectional view of a conventional heat exchange type ventilation device, and FIG. 10 is an electric circuit diagram of the same heat exchange type ventilation device. 1... Body, 2... Outdoor side suction port, 3... Indoor side discharge port, 4... Air supply passage, 5... Indoor side suction port, 6... Outdoor side discharge port, 7... Exhaust passage, 8...
... Heat exchange element, 9 ... Air supply vane, 10 ... Exhaust vane, 11 ... Motor, 12 ... Second exhaust passage, 13 ... Branch section, 14 ... Merging section, 15 ...
Damper, 16...damper motor, 17...relay, 18...operating coil, 19...NC contact.

Claims (1)

[Claims] 1. An air supply passage that communicates the outdoor suction port with the indoor discharge port, an exhaust passage that communicates the indoor suction port with the outdoor discharge port, and an air supply passage provided at the intersection of the air supply passage and the exhaust passage. a heat exchange element, an air supply vane that blows air into the air supply passage, an exhaust vane that blows air into the exhaust passage, a motor that rotates them, and a branch provided on the upstream side of the heat exchange element in the exhaust passage. Department and
The main body includes a confluence section provided downstream of the heat exchange element, and a second exhaust passage that communicates the branch section and the confluence section without passing through the heat exchange element, the branch section and the confluence section a damper that selectively communicates the indoor suction port and the outdoor discharge port with the heat exchange element, or the upper air chamber suction port and the outdoor discharge port with the second exhaust passage; and a damper motor to operate it,
A heat exchange type ventilation device in which an operating coil of a relay is connected in parallel with the power source of the damper motor, and an NC contact of the relay is provided in series with the power source of the motor.