JPH10227513A - Control device for heat exchanging type ventilation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable frost generated at an inlet side of a discharging passage of a heat exchanger in a heat exchanging type ventilation device to be easily removed with cooled fed air. SOLUTION: This heat exchanging type ventilation device is operated such that an operation of an air feeding blower 5 and an operation of an air discharging blower 6 are started concurrently during its normal operation and an air feeding flow A and an air discharging flow B are flowed through a heat exchanger 2. As the cooled and fed air flow A flows, frosting is generated at a passage inlet side of the heat exchanger 2 where the heated air discharging flow B is flowed. This control device for the ventilation device is operated such that as an air speed of the discharged flow B detected by an air speed sensor 7 becomes less than a first set value due to frosting, an intermittent operation control means 11 is operated and an air feeding blower 5 is stopped in operation until an air speed of the air discharged flow B is recovered.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for controlling a ventilator using a heat exchanger.

[0002]

2. Description of the Related Art FIG. 11 is an overall configuration diagram showing a control device of a conventional heat exchange type ventilator. The heat exchange ventilator includes a heat exchanger 2 (described later with reference to FIG. 2) housed in a main body 1, an air supply passage 3 extending from the outdoor suction port 1 a to the indoor air outlet 1 b via the heat exchanger 2, and an indoor space. An exhaust passage is formed from the inlet 1c to the outdoor outlet 1d via the heat exchanger 2. The air supply passage 3 and the exhaust passage 4 are provided with an air supply blower 5 and an exhaust blower 6, respectively.

[0003] The conventional heat exchange type ventilator is configured as described above, and when the remote controller 12 installed in the room is manually operated, the ventilation control means 32 of the ventilation control device 31 operates to supply air and air. The exhaust blowers 5 and 6 start operating at the same time, and the supply air flow A and the exhaust air flow B are generated. In this way, by supplying and exhausting air through the heat exchanger 2, ventilation is performed while recovering heat, heat loss during heating is reduced, fresh air is introduced into the room, and dirty air in the room is removed. Discharge. If there is a stop request from the remote controller 12, both the air supply and exhaust blowers 5, 6 are stopped.

[0004]

In the conventional heat exchange type ventilator control system described above, the air supply and exhaust blowers 5, 6 are always operated and stopped simultaneously (simultaneous operation of forced supply and discharge).
Therefore, when the outdoor suction temperature in a cold region such as winter falls significantly, the exhaust side air is cooled by the supply side air, and at that time, the steam contained in the exhaust air is cooled near the inlet of the exhaust passage 4 of the heat exchanger 2. Frost adheres as a result, and there is a problem that the exhaust air volume is significantly reduced.

[0005] Therefore, using a temperature detector and a timer,
There is a method in which the air supply blower 5 is intermittently stopped and only the exhaust blower 6 is operated. However, in this method, it is difficult to grasp the actual degree of adhesion of frost, so that the frost is completely removed. Not be able to do so or supply air more than necessary
There is a problem that there is a possibility to stop the.
Japanese Patent Application Laid-Open No. 62-19631 discloses a method in which room air is introduced into the air supply passage 3 by switching dampers. However, in this method, ventilation cannot be performed during defrosting. There is a point.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a heat exchange type in which frost generated in a heat exchanger can be easily removed and ventilation can be performed even during defrosting. It is an object to provide a control device for a ventilation device.

[0007]

According to a first aspect of the present invention, a control apparatus for a heat exchange type ventilator includes a wind speed detector for detecting a wind speed of an exhaust flow in an exhaust passage, and detects a wind speed of the detected exhaust flow. The operation and stop of the air supply blower are controlled in accordance with.

Further, the control device for the heat exchange type ventilator according to the second invention is provided with a wind speed detector for detecting a wind speed of the exhaust flow in the exhaust passage, so that the detected wind speed of the exhaust flow is less than the first set value. In this case, the air supply blower is stopped until the wind speed of the exhaust flow recovers.

A control device for a heat exchange type ventilator according to a third aspect of the present invention is the control device for the heat exchange type ventilator according to the second aspect of the present invention, wherein the air supply blower is stopped when a detected wind speed of the exhaust gas flow becomes equal to or less than a first set value. In this state, the operation of the air supply blower is restarted when the wind speed of the exhaust gas flow exceeds the second set value.

A control device for a heat exchange type ventilating apparatus according to a fourth aspect of the present invention is the control apparatus according to the second aspect of the invention, further comprising a temperature detector for detecting an outdoor air suction temperature in an air supply passage. When the temperature is equal to or lower than the set temperature and the detected wind speed of the exhaust stream becomes equal to or lower than the first set value, the air supply blower is stopped until the wind speed of the exhaust stream recovers.

A control device for a heat exchange type ventilator according to a fifth aspect of the present invention is the control device according to the second to fourth aspects, wherein when the air supply blower stops and shifts to intermittent operation, this is displayed. It was done.

A control device for a heat exchange ventilator according to a sixth aspect of the present invention is the control device for the heat exchange type ventilator according to the second to fourth aspects, wherein when the air supply blower stops and shifts to the intermittent operation, this is sent to the remote controller. This is transmitted and displayed.

According to a seventh aspect of the present invention, there is provided a heat exchange type ventilator control apparatus according to the second to sixth aspects, wherein when the air supply blower is stopped, the air supply passage is closed by a shutter. It is.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION

Embodiment 1 FIG. 1 to 3 show one embodiment of the first to third inventions of the present invention. FIG. 1 is an overall configuration diagram, FIG. 2 is an enlarged perspective view of an end face of a heat exchanger, and FIG. In the drawings, the same parts are denoted by the same reference numerals (the same applies to the following embodiments).

1 and 2, reference numeral 1 denotes a main body of a ventilator; 1a, an outdoor suction port provided outside the main body 1;
b is an indoor air outlet also provided on the indoor side, 1c is an indoor air inlet also provided on the indoor side, 1d is an outdoor air outlet also provided on the outdoor side, and 2 is a heat exchange housed in the main body 1. A large number of corrugated plates 2a, 2b and a large number of flat plates 2c having moisture permeability and heat conductivity are alternately laminated, and the corrugated plates 2a, 2b are changed in direction by 90 degrees in a public manner. It is formed in a prismatic shape by being inserted.

Reference numeral 3 denotes an air supply passage from the outdoor suction port 1a to the indoor air outlet 1b via the heat exchanger 2 and through which the air supply flow A flows.
Is the outdoor air outlet 1 from the indoor air inlet 1c through the heat exchanger 2.
An exhaust passage through which the exhaust flow B reaches d, an air blower 5 installed in the air supply passage 3, an exhaust blower 6 installed in the exhaust passage 4, and a blower 7 on the discharge side of the exhaust blower 6. Wind speed detector.

8 is an intermittent operation control device, 9 is an air blower driving device for driving the air blower 5, 10 is an exhaust air blower driving device for driving the exhaust air blower 6, and 11 is a microcomputer (hereinafter referred to as a microcomputer). ), An intermittent operation control means for controlling the air supply and exhaust blower driving devices 9 and 10, and a remote controller 12 for controlling the intermittent operation control means 11.

Next, prior to describing the operation of this embodiment, a normal operation of the heat exchange type ventilator will be described. When the operator manually operates the remote controller 12, the intermittent operation control means 11 operates, and the air supply and exhaust air blowers 5 and 6 operate simultaneously via the air supply and exhaust air blower driving devices 9 and 10. Starting, a supply air flow A and an exhaust flow B are generated. The supply air flow A and the exhaust air flow B flow through the corrugated plates 2a and 2b constituting the heat exchanger 2, and are ventilated while recovering heat.
The heat loss during heating is reduced, fresh air is taken into the room, and dirty air inside the room is discharged. If there is a stop request from the remote controller 12, both the air supply and exhaust blowers 5, 6 are stopped.

Next, the operation of this embodiment will be described with reference to FIG. The program of this flowchart is stored in a ROM (not shown) of the microcomputer (the same applies to the following embodiments). When the remote controller 12 is operated in step S1, the intermittent operation control means 11 operates, and the air supply and exhaust air blowers 5 and 6 start normal operation by the air supply and exhaust air blower driving devices 9 and 10. In step S2, the output of the wind speed detector 7, that is, the wind speed of the exhaust flow B is read.

In step S3, the wind speed of the exhaust flow B is set to a set value a.
It is determined whether it is below or not, and if it exceeds the set value a, the process returns to step S1 to perform the normal operation. Due to the cooled supply air flow A, frost is generated near the inlet of the exhaust air passage of the heat exchanger 2, and when the wind speed decreases and becomes equal to or less than the set value a, the process proceeds to step S4, where the air supply blower 5 is stopped and intermittently stopped. Driving. with this,
Since the cooled supply air flow A does not flow, the frost in the heat exchanger 2 is heated and melted by the exhaust air flow B.

In step S5, the wind speed of the exhaust flow B is read, and in step S6, the wind speed of the exhaust flow B is set at a set value b (a <
b) It is determined whether the temperature is equal to or more than the above. If the frost of the heat exchanger 2 has melted and has reached the set value b or more, the process returns to step S1 to perform the normal operation, and if the frost is less than the set value b, the process returns to step S4. . Here, steps S2 to S6 correspond to the intermittent operation control means 1.
1.

In this manner, when the wind speed of the exhaust stream B becomes equal to or less than the set value a in accordance with the wind speed of the exhaust stream B, the air supply blower 5 is operated until the wind speed of the exhaust stream B recovers. The heat exchanger 2 is heated by the heat of the exhaust air flow B from the room to remove the frost and the like generated by cooling by the outdoor air, so that the air volume of the exhaust air flow B is significantly reduced. Can be prevented. Even if the air supply blower 5 stops, the ventilation can be continued because the exhaust blower 6 is operating. In addition, it is possible to minimize the negative pressure in the room due to the stop of the air supply blower 5.

Embodiment 2 FIG. 4 and 5 show an embodiment of the fourth invention of the present invention. FIG. 4 is an overall configuration diagram, and FIG. 5 is an operation flowchart. FIG. 2 is also used in the second embodiment. In FIG. 4, reference numeral 14 denotes a temperature detector provided near the outdoor suction port 1a, and the other components are the same as those in FIG.

Next, the operation of this embodiment will be described with reference to FIG. In step S1 to start the operation in the same manner as FIG. 3, the output of the temperature detector 14 in step S11, i.e., determines whether the temperature t of the outdoor air sucked is set temperatures T ₁ below, exceeds the set temperature T ₁ of If so, the process returns to step S1 to perform the normal operation. If set temperatures T ₁ than the output of the wind speed detectors 7 proceeds to step S2, i.e. reads the wind velocity of the exhaust stream B. Hereinafter, steps S2 to S are performed similarly to FIG.
In step 6, control is performed in accordance with the wind speed of the exhaust flow B. Here, steps S11, S2 to S6 constitute the intermittent operation control means 11.

In this way, when the outdoor suction temperature t is equal to or lower than the set temperature T ₁ and the wind speed of the exhaust stream B is equal to or lower than the set value a, the wind speed of the exhaust stream B is restored by the air supply blower 5. Since the intermittent operation in which the operation is stopped until the operation is completed is performed, in addition to the effect of the first embodiment, it is possible to perform the defrosting control with higher accuracy.

Embodiment 3 FIG. 6 and 7 are views showing an embodiment of the fifth invention of the present invention. FIG. 6 is an overall configuration diagram, and FIG. 7 is an operation flowchart. FIG. 2 is also used in the third embodiment. In FIG. 6, reference numeral 16 denotes an intermittent operation control unit obtained by adding an external display control function to the intermittent operation control unit 11 of FIG. 1, and reference numeral 17 denotes a display provided outside. .

Next, the operation of this embodiment will be described with reference to FIG. In steps S1 to S4, the wind speed of the exhaust gas flow B is checked in the same manner as in FIG. In step S13, the fact that the intermittent operation has been performed is output to the outside,
It is displayed on the display 17. In steps S5 and S6, the wind speed of the exhaust gas flow B is checked in the same manner as in FIG.
In step 4, the display of the intermittent operation is canceled. Here, step S1
Reference numeral 3 denotes a display unit.

In this way, when the wind speed of the exhaust stream B becomes equal to or less than the set value a, the air supply blower 5 is stopped intermittently until the wind speed of the exhaust stream B recovers. In addition to the effects of the first embodiment, it is possible to easily know that the user is operating intermittently. Note that the function of step S11 in FIG. 5 can be added.

Embodiment 4 FIG. 8 is an overall configuration diagram showing an embodiment of the sixth invention of the present invention. 2 and 7 are also used in the fourth embodiment. In FIG. 8, 1
Reference numeral 8 denotes an intermittent operation control unit obtained by adding a transmission / reception function to the remote controller 12 to the intermittent operation control unit 11 in FIG. The operation of this embodiment is the same as that of FIG.
As shown in parentheses, it transmits to the remote controller 12 that the operation is intermittent, and step S14 transmits that the above operation is canceled. Here, step S13 constitutes a transmission unit.

In this way, when the intermittent operation is performed, this is transmitted to the remote controller 12 and displayed on the display (not shown), so that the same effect as in the third embodiment is obtained. Note that the function of step S11 in FIG. 5 can be added.

Embodiment 5 9 and 10 show an embodiment of the seventh invention of the present invention. FIG. 9 is an overall configuration diagram, and FIG. 10 is an operation flowchart. FIG. 2 is also used in the fifth embodiment. In FIG. 9, reference numeral 20 denotes a shutter for shutting off the outdoor suction port 1a, that is, the air supply passage 3;
Reference numeral 1 denotes an intermittent operation control unit obtained by adding a control function of the operation of the shutter 20 to the intermittent operation control unit 11 of FIG.
Is the same as

Next, the operation of this embodiment will be described with reference to FIG. In steps S1 to S4, the wind speed of the exhaust gas flow B is checked in the same manner as in FIG. In step S16, the shutter 20 is operated to set the air supply passage 3
To block the inflow of outside air. Steps S5 and S6
Then, the wind speed of the exhaust flow B is checked in the same manner as in FIG. 3, and it is determined whether or not the wind speed is equal to or higher than the set value b. Here, step S16 constitutes closing means.

As described above, in the case of intermittent operation, the shutter 20 is closed to shut off the air supply passage 3, so that when the air supply blower 5 stops, the interior of the room becomes negative pressure,
It is possible to prevent outside air from flowing into the room. Note that step S11 in FIG. 5 and step S11 in FIG.
It is also possible to add the functions of S13 and S14.

[0034]

As described above, according to the first aspect of the present invention, since the wind speed of the exhaust gas flow is detected and the operation and stop of the air supply blower are controlled according to this wind speed, the cooled air flow Accordingly, the frost adhering near the heat exchanger exhaust passage inlet can be melted by the heat of the exhaust gas flow, and the air flow of the exhaust gas flow can be prevented from being significantly reduced.

In the second invention, the wind speed of the exhaust flow is detected, and when the wind speed falls below the first set value, the air supply blower is stopped until the wind speed of the exhaust flow recovers. Defrost control can be realized with higher accuracy.

Further, in the third aspect, the wind speed of the exhaust gas flow is detected, and when the wind speed becomes equal to or less than the first set value, the air supply blower is stopped. In this state, the wind speed of the exhaust gas flow becomes equal to or more than the second set value. Then, since the operation of the air supply blower is restarted, in addition to the effect of the second invention, it is possible to minimize the negative pressure in the room due to the stoppage of the air supply blower.

In the fourth invention, the outdoor suction temperature and the wind speed of the exhaust gas flow are detected, and the outdoor suction temperature is set to a predetermined temperature or less.
In addition, when the wind speed of the exhaust flow becomes equal to or less than the first set value, the air supply blower is stopped until the wind speed of the exhaust flow recovers, so that the defrosting control of the second invention can be realized with higher accuracy.

Further, in the fifth invention, when the operation is shifted to the intermittent operation, this is displayed, and in the sixth invention, it is transmitted to the remote controller and displayed. Therefore, in addition to the effect of the second invention, There is an effect that the user can easily know that the vehicle is running intermittently.

In the seventh invention, when the air supply fan is stopped, the air supply passage is closed by the shutter. Therefore, the interior of the room becomes a negative pressure due to the stop of the air supply fan, and the outside air enters the room. Inflow can be prevented.

[Brief description of the drawings]

FIG. 1 is an overall configuration diagram showing a first embodiment of the present invention.

FIG. 2 is an enlarged perspective view of an end face of the heat exchanger of FIG. 1;

FIG. 3 is an operation flowchart showing the first embodiment of the present invention.

FIG. 4 is an overall configuration diagram showing a second embodiment of the present invention.

FIG. 5 is an operation flowchart showing a second embodiment of the present invention.

FIG. 6 is an overall configuration diagram showing a third embodiment of the present invention.

FIG. 7 is an operation flowchart showing a third embodiment of the present invention.

FIG. 8 is an overall configuration diagram showing a fourth embodiment of the present invention.

FIG. 9 is an overall configuration diagram showing a fifth embodiment of the present invention.

FIG. 10 is an operation flowchart showing a fifth embodiment of the present invention.

FIG. 11 is an overall configuration diagram showing a control device of a conventional heat exchange type ventilation device.

[Explanation of symbols]

1a outdoor inlet, 1b indoor outlet, 1c indoor inlet, 1d outdoor outlet, 2 heat exchanger, 3 air supply passage,
4 exhaust passage, 5 air blower, 6 exhaust blower,
7 wind speed detector, 9 air blower drive, 10 exhaust blower drive, 11, 16, 18, 21 intermittent operation control means, 12 remote controller, 14 temperature detector, 17
Display, 20 shutters, S2 to S6, S11 intermittent operation control means, S13 display means, transmission means, S16
Closure means.

Claims (7)

[Claims] An air supply passage extending from the outdoor suction port to the indoor air outlet through the heat exchanger; and an exhaust passage communicating from the indoor air inlet to the outdoor air outlet through the heat exchanger. In a heat exchange type ventilator provided with an air supply blower in an air passage and an exhaust blower in the exhaust passage, a wind speed detector for detecting a wind speed of an exhaust flow is provided in the exhaust passage. A control device for a heat exchange type ventilator, comprising intermittent operation control means for controlling operation and stop of the air supply blower according to a wind speed. 2. An air supply passage from the outdoor suction port to the indoor air outlet through the heat exchanger, and an exhaust passage from the indoor air inlet to the outdoor air outlet through the heat exchanger. In a heat exchange type ventilator provided with an air supply blower in an air passage and an exhaust blower in the exhaust passage, a wind speed detector for detecting a wind speed of an exhaust flow is provided in the exhaust passage. A control device for a heat exchange type ventilator, comprising: intermittent operation control means for stopping the air supply blower until the wind speed of the exhaust gas is restored when the wind speed becomes equal to or less than a first set value. 3. The intermittent operation control means stops the air supply blower when the detected wind speed of the exhaust stream becomes equal to or lower than the first set value, and in this state, when the wind speed of the exhaust stream becomes equal to or higher than the second set value. 3. The control device for a heat exchange type ventilator according to claim 2, wherein the operation of the air supply blower is restarted. 4. A temperature sensor for detecting an outdoor air suction temperature is provided in an air supply passage, and an intermittent operation control means is provided for controlling the intermittent operation control means so that the detected outdoor suction temperature is equal to or lower than the installation temperature, and the detected exhaust air flow velocity is detected. 3. The control device for a heat exchange type ventilator according to claim 2, wherein the air supply blower is stopped until the wind speed of the exhaust flow recovers below the first set value. 5. The heat exchange as claimed in claim 2, further comprising a display, and display means for displaying the operation of the intermittent operation control means on the display when the intermittent operation control means operates. Control device for shape ventilation system. 6. A remote controller having a display and a remote controller for remotely controlling the heat exchange type ventilator, and when the intermittent operation control means is operated, this is transmitted to the remote controller and displayed on the display. The control device for a heat exchange type ventilator according to any one of claims 2 to 4, further comprising means. 7. A system according to claim 2, further comprising a shutter for opening and closing the air supply passage, and closing means for closing the shutter when the intermittent operation control means operates.
The control device for a heat exchange type ventilator according to any one of the above.