WO2018056191A1 - Heat exchange-type ventilation device - Google Patents

Abstract

The purpose of the present invention is to provide a heat exchange-type ventilation device that makes it possible to automatically determine an opening surface area of an air volume adjustment damper and facilitate on-site construction. A heat exchange-type ventilation device (1) is provided with: an air supply blower provided with an air supply motor; an exhaust blower provided with an exhaust motor; an air supply path (7) through which the air-supplying blower blows air from outdoors to indoors; an exhaust path through which the exhaust blower blows air from indoors to outdoors; a heat exchange element that is located at an intersection of the air supply path (7) and the exhaust path and is for exchanging heat when indoor air and outdoor air are being exchanged; and a current detection unit for detecting a current flowing to the air supply motor. The heat exchange-type ventilation device has a control unit (11) by which the rotational speed of the air supply motor is controlled. The air supply path is connected to a circulation channel (14) of a unitary air conditioner (13). The control unit (11) causes an opening surface area of an air volume adjustment damper (15) provided inside the air supply path (7) to change so that a current value of the air supply motor detected by the current detection unit falls within a predetermined range of target current values.

Description

Heat exchange ventilator

The present invention relates to a heat exchange type ventilator.

Conventionally, as a ventilator for exchanging heat between outside air and room air, a heat exchange type ventilator that is installed in a building, introduces outside air from an outside air supply port, and supplies the inside through a built-in heat exchange element is known. (For example, refer to Patent Document 1).

Hereinafter, the heat exchange type ventilator will be described with reference to FIG.

FIG. 11 is a top view showing a conventional heat exchange type ventilator.

As shown in FIG. 11, the ventilation device main body 201 is installed in an attic space or a ceiling space in a building.

Fresh fresh air is introduced from the outside air supply port 202, passes through the built-in heat exchange element 203, and is supplied indoors through the indoor supply port 204.

On the other hand, the dirty air in the room is introduced from the indoor exhaust port 205, passes through the heat exchange element 203, and is exhausted to the outside through the outdoor exhaust port 206.

The fresh outside air introduced from the outside air supply port 202 and the indoor dirty air introduced from the room exhaust port 205 are connected to the electric motor 207 through the heat exchange element 203 and the air supply fan 209 connected to the same shaft 208. And the exhaust air blower 210.

Japanese Patent Laid-Open No. 11-325535

¡The heat exchange type ventilator needs to adjust the air volume in the air supply path or exhaust path in order to ventilate.

When connecting the air supply path (or exhaust path) of a conventional heat exchange type ventilator and the circulation air path of unitary air conditioning, in order to adjust the air volume, the air supply path of the heat exchange type ventilator An air volume adjustment damper was installed in the duct in (or the exhaust path). However, in this configuration, the angle (opening area) of the air volume adjusting damper has to be determined while measuring the air volume, and there is a problem that the on-site construction is complicated.

Therefore, the present invention solves the above-described conventional problems, and an object of the present invention is to provide a heat exchange type ventilator that can automatically determine the opening area of the air volume adjusting damper and simplify on-site construction. In addition, construction simplification is an example, and about the structure characterized by other than construction simplification, it is not limited to the heat exchange type ventilator which can simplify construction.

In order to achieve this object, a heat exchange ventilator according to an aspect of the present invention includes an air supply fan provided with an air supply motor, an exhaust air fan provided with an exhaust motor, an air supply The air supply path that is blown from the outside to the room by the air blower, the exhaust path that is blown from the room to the outside by the exhaust air blower, and the air supply path and the exhaust path are provided at the intersecting positions. A heat exchange element for exchanging heat when ventilating the air, and a current detector for detecting a current flowing through the air supply motor. In the heat exchange type ventilator, the control unit controls the rotation speed of the air supply motor, the air supply path is connected to the circulation air path of the unitary air conditioning, and the control unit is for air supply detected by the current detection unit. The opening area of the air volume adjusting damper provided in the air supply path is changed so that the current value of the motor falls within a predetermined range of the target current value. This achieves the intended purpose.

According to the present invention, it is possible to provide a heat exchange type ventilation device that simplifies on-site construction. In addition, construction simplification is an example, and about the structure characterized by other than construction simplification, it is not limited to the heat exchange type ventilator which can simplify construction. For example, when connected to unitary air conditioning, it is possible to provide a heat exchange type ventilator that can increase the temperature control efficiency of unitary air conditioning regardless of the simplification of construction.

FIG. 1 is a top sectional view showing a heat exchange type ventilator according to a first embodiment of the present invention. FIG. 2 is a diagram illustrating a relationship between the motor rotation speed and the motor current value of the heat exchange type ventilator according to the first embodiment. FIG. 3 is a diagram illustrating the construction of the heat exchange type ventilator according to the first embodiment. FIG. 4 is a diagram showing another construction of the heat exchange type ventilation apparatus of the first embodiment. FIG. 5 is a top cross-sectional view showing the heat exchange type ventilator of the second embodiment. FIG. 6 is a diagram illustrating the construction of the heat exchange type ventilator according to the second embodiment. FIG. 7 is a control block diagram of the heat exchange ventilator according to the second embodiment. FIG. 8 is a diagram showing another construction of the second embodiment heat exchange type ventilator. FIG. 9 is a control block diagram of the heat exchange type ventilator of FIG. FIG. 10 is a diagram showing another construction of the heat exchange type ventilation apparatus of the second embodiment. FIG. 11 is a top view showing a conventional heat exchange type ventilator.

A heat exchange type ventilator according to an aspect of the present invention is blown into a room from the outside by an air supply fan provided with an air supply motor, an exhaust air fan provided with an exhaust motor, and an air supply fan. The air supply path, the exhaust path that is blown from the room to the outside by the exhaust fan, and the position where the air supply path and the exhaust path cross each other, and exchanges heat when ventilating indoor air and outdoor air. And a current detection unit that detects a current flowing through the air supply motor. In the heat exchange type ventilator, the control unit controls the rotation speed of the air supply motor, the air supply path is connected to the circulation air path of the unitary air conditioning, and the control unit is for air supply detected by the current detection unit. The opening area of the air volume adjusting damper provided in the air supply path is changed so that the current value of the motor falls within a predetermined range of the target current value.

This makes it possible to automatically determine the opening area of the air volume adjustment damper, simplify the on-site construction, and reduce the number of construction man-hours. Further, even when the operation notch is changed after the completion of the construction, the adjustment and construction of the air volume adjusting damper is not necessary again, and the adjustment can be automatically performed, so that the number of construction man-hours can be reduced. The same effect can be obtained when the exhaust path is connected to the circulation air path of the unitary air conditioning and the opening area of the air volume adjusting damper provided in the exhaust path is changed.

Hereinafter, embodiments of the present invention will be described with reference to the drawings.

(Embodiment 1)
Regarding the heat exchange type ventilator of the first embodiment, an internal configuration, an air supply path, and an exhaust path will be described with reference to FIG.

FIG. 1 is a top cross-sectional view showing the heat exchange type ventilator of the first embodiment.

As shown in FIG. 1, the heat exchange ventilator 1 includes an outside air suction port 2, an indoor air exhaust port 3 on the side surface of a box-shaped main body, and an outside air supply port 4 on the side surface facing this side surface. An air inlet 5 is provided.

The heat exchange ventilator 1 sucks fresh outdoor air (supply air) from the side outside air intake port 2, passes through the heat exchange element 6 inside the heat exchange type ventilator 1, and from the outside air supply port 4. An air supply path 7 for supplying the room is provided.

The heat exchange ventilator 1 also has an exhaust path 8 that sucks contaminated indoor air (exhaust air) from the indoor air intake port 5 and exhausts the air through the heat exchange element 6 from the indoor air exhaust port 3 to the outside of the room. I have. At this time, the heat exchange element 6 has a heat recovery function of supplying the amount of heat of exhausted air to the supplied air, or supplying the amount of heat of supplied air to the amount of heat of exhausted air. Have.

Fresh outdoor air (supply air) introduced from the outside air inlet 2 and contaminated indoor air (exhaust air) introduced from the indoor air inlet 5 are an air supply fan 9 and an exhaust fan 10. , The air flow path 7 and the exhaust path 8 respectively flow.

The heat exchange element 6 is disposed at a position where the air supply path 7 and the exhaust path 8 intersect. An air cleaning filter 12 is disposed on each of the outdoor air suction side and the indoor air suction side of the heat exchange element 6. The outside air inlet 2, the indoor air outlet 3, the outside air inlet 4, and the indoor air inlet 5 are each configured to be connected to a duct.

The heat exchange ventilator 1 has a control unit 11 that controls the rotation speeds of the supply motor of the supply fan 9 and the exhaust motor of the exhaust fan 10. The control unit 11 controls the number of rotations of the air supply motor of the air supply fan 9 and the air discharge motor of the air exhaust fan 10 to keep the air supply air amount and the exhaust air amount constant, and the air supply motor or It has a current detector 17 that detects the current flowing through the exhaust motor.

Here, the control performed by the control unit 11 to keep the supply air amount and the exhaust air amount constant will be described. When the heat exchange ventilator 1 is activated, the control unit 11 controls the rotation speeds of the air supply motor and the exhaust motor so that the airflow output from the air supply fan 9 and the exhaust air fan 10 are equal. (Heat exchange air operation) Normally, when the operation is started in a construction state, a fixed external static pressure due to duct routing is applied to the heat exchange type ventilator. Therefore, in order to output a predetermined air volume, the control unit 11 controls the current value of each motor while confirming the rotation speeds of the air supply motor and the exhaust motor. The control unit 11 stores in advance the relationship between the supply motor rotation speed and the supply motor current value for outputting a predetermined air volume, and the relationship between the exhaust motor rotation speed and the exhaust motor current value.

FIG. 2 is a diagram showing the relationship between the motor speed and the motor current value of the heat exchange type ventilator of the first embodiment. The control unit 11 realizes the set predetermined air volume by matching the relationship between the motor rotation speed and the motor current value. That is, constant air volume control can be realized on the line shown in FIG.

Here, the characteristic part in the present embodiment, that is, the air volume adjustment damper operation of the control unit 11 will be described.

FIG. 3 is a diagram showing the construction of the heat exchange type ventilator of the first embodiment.

The unitary air conditioner 13 is installed in a machine room or the like in a building, and is connected to the room by a duct to form a circulation air passage 14 in the room.

The unitary air conditioner 13 performs cooling and heating so that the set room temperature is reached, blows air to the circulation air passage 14, and circulates air through a plurality of indoor rooms, thereby controlling the interior to a predetermined temperature. To do.

The circulation air passage 14 is a temperature control route through the unitary air conditioner 13 and is not ventilated indoors, and there is no supply of fresh outdoor air indoors. Therefore, by connecting the air supply path 7 to the circulation air path 14, the heat is exchanged at the same time while adjusting the temperature by indoor circulation, and the outdoor fresh air is taken in indoors while collecting heat. At this time, the air supply path 7 on the downstream side of the heat exchange element 6 is connected to the circulation air path 14 of the unitary air conditioner 13.

At this time, the unitary air conditioner 13 performs indoor circulation operation, but negative pressure is applied to the outside air supply port 4 of the heat exchange type ventilator 1 by the air blowing function of the unitary air conditioner 13. As a result, the air supply path 7 of the heat exchange type ventilator 1 is pulled by the unitary air conditioner 13 so that the air volume exceeding the design flows. Therefore, particularly in the winter, a large amount of low temperature outside air may flow and cause problems such as condensation. In order to suppress this, an air volume adjustment damper 15 for canceling the negative pressure from the unitary air conditioner 13 is provided between the heat exchange type ventilation device 1 and the circulation air path 14 of the unitary air conditioner 13 in the air supply path 7. .

Conventionally, the angle of the air volume adjusting damper 15 is determined by adjusting the opening area (opening ratio) so as to be a predetermined air volume while actually measuring the air supply air volume of the heat exchange type ventilation device 1. However, on-site construction becomes complicated because it is necessary to measure the air volume each time.

In this embodiment, since the air volume adjustment damper 15 automatically adjusts the opening area (opening ratio) by the control unit 11, it is possible to reduce the number of on-site construction man-hours.

Specifically, the control unit 11 causes the air supply fan 9 to be operated at a predetermined rotational speed. At this time, if the unitary air conditioner 13 is operated and the air volume adjustment damper 15 is fully open, the air blower 9 is under a negative pressure and the load is reduced, and the current value of the air supply motor detected by the current detector 17 is predetermined. The current value is smaller than the current value.

Therefore, the control unit 11 moves the damper angle by a predetermined angle (for example, 1 °) so that the damper opening area (opening ratio) of the air volume adjusting damper 15 becomes small. When the control unit 11 enters a predetermined range (for example, within 1%) with respect to the target current value, the control unit 11 ends the adjustment of the air volume adjustment damper 15 and determines the damper angle.

Here, the rotational speed of the air supply blower 9 at the time of adjustment of the air volume adjustment damper 15 is preferably the rotational speed at the external static pressure 0 Pa (P = 0 in FIG. 2) that can reduce power consumption most. This is because the pressure loss can be reduced most at the external static pressure of 0 Pa (P = 0 in FIG. 2).

In addition, if the control unit 11 causes the air supply fan 9 to operate at a predetermined speed and the unitary air conditioner 13 is operated and the air volume adjustment damper 15 is fully closed, the air supply fan 9 has no air supply path. I can't work. Therefore, the current value of the air supply motor detected by the current detection unit 17 is smaller than the predetermined current value. Therefore, the control unit 11 moves the damper angle by a predetermined angle (for example, 1 °) so that the damper opening area (opening ratio) of the air volume adjusting damper 15 is increased. When the control unit 11 enters a predetermined range (for example, within 1%) with respect to the target current value, the control unit 11 ends the adjustment of the damper and determines the damper angle.

In the heat exchange type ventilator 1 of the present embodiment, the motor is operated so that the rotation speed of the motor is constant, and the damper opening area of the air volume adjustment damper 15 is set so that the current value of the motor is within a predetermined range of the target current value. The damper angle was determined by adjusting (aperture ratio). On the other hand, the motor is operated so that the current value of the motor is constant, and the damper opening area (opening ratio) of the air volume adjusting damper 15 is adjusted so that the rotational speed of the motor is within a predetermined range of the target rotational speed. The angle may be determined. In this case, a rotation speed detection section (not shown) is provided instead of the current detection section 17, and the rotation speed detection section detects the rotation speed of the air supply motor or the exhaust motor, and the control section 11 sets the damper angle. decide.

FIG. 4 is a diagram showing another construction of the heat exchange type ventilation apparatus of the first embodiment. The exhaust path 8 may be connected to the indoor circulating air path 14 as shown in FIG. 4 showing another construction. The unitary air conditioner 13 performs indoor circulation operation, but negative pressure is applied to the indoor air suction port 5 of the heat exchange type ventilation device 1 by the air blowing function of the unitary air conditioner 13. Thereby, the exhaust flow path 8 of the heat exchange type ventilation apparatus 1 cannot flow the design air volume while being pulled by the unitary air conditioner 13. Therefore, especially in the winter season, it is difficult for the high-temperature indoor airflow to flow with respect to the low-temperature outdoor airflow, and the outside air that does not exchange heat may flow directly into the room through the air supply path 7 and may cause problems such as condensation and cold wind. There is. In order to suppress this, an air volume adjusting damper 16 for canceling the negative pressure from the unitary air conditioner 13 is provided between the heat exchange type ventilation device 1 and the circulation air path 14 of the unitary air conditioner 13 in the exhaust path 8.

Since the air volume adjusting damper 16 automatically adjusts the opening area (opening ratio) by the control unit 11, it is possible to reduce the number of construction steps on site.

Specifically, the control unit 11 causes the exhaust fan 10 to be operated at a predetermined rotational speed. At this time, if the unitary air conditioner 13 is operated and the air volume adjustment damper 16 is fully open, the exhaust fan 10 has a negative pressure and cannot be blown. Therefore, the exhaust fan 10 does not work, and the current value of the exhaust motor detected by the current detection unit 17 is smaller than a predetermined current value. Therefore, the control unit 11 moves the damper angle by a predetermined angle (for example, 1 °) so that the damper opening area (opening ratio) of the air volume adjusting damper 16 becomes small. When the controller 11 enters a predetermined range (for example, within 1%) with respect to the target current value, the controller 11 ends the adjustment of the air volume adjustment damper 16 and determines the damper angle.

Here, the rotational speed of the exhaust blower 10 at the time of adjustment of the air volume adjusting damper 16 is preferably the rotational speed at the external static pressure 0 Pa (P = 0 in FIG. 2) that can reduce power consumption most.

Further, if the control unit 11 operates the exhaust fan 10 at a predetermined rotation speed and the unitary air conditioner 13 is operated at this time and the air volume adjustment damper 16 is fully closed, the exhaust fan 10 has no air supply path, so that the work is not performed. I can't. Therefore, the current value of the exhaust motor detected by the current detection unit 17 is smaller than the predetermined current value. Therefore, the control unit 11 moves the damper angle by a predetermined angle (for example, 1 °) so that the damper opening area (opening ratio) of the air volume adjusting damper 16 is increased. When the controller 11 enters a predetermined range (for example, within 1%) with respect to the target current value, the controller 11 ends the adjustment of the air volume adjustment damper 16 and determines the damper angle.

Thus, by automatically determining the angle of the air volume adjusting damper 16, the on-site construction can be simplified and the heat exchange type ventilation device 1 capable of reducing the number of construction steps can be obtained.

The following supplements the present embodiment.

The unitary air conditioning 13 includes the concept of the whole building air conditioning or the central air conditioning (central air conditioning).

Moreover, although the control part 11 was provided in the heat exchange type ventilator 1, it does not need to be provided in the heat exchange type ventilator 1. FIG. In this case, control is performed by the control unit 11 located at a position away from the heat exchange ventilator 1.

The control unit 11 includes the current detection unit 17, but the current detection unit 17 may be provided separately from the control unit 11.

Further, the control unit 11 detects and controls the rotation speed and current value of the supply motor and the exhaust motor, and controls to keep the supply air amount and the exhaust air amount constant. This is done to specify the position of = 0. Since it is not always necessary to specify the position of P = 0 in FIG. 2, constant air volume control that keeps the supply air volume and the exhaust air volume constant is not essential. If the constant air volume control is not performed, the position of P = 0 may not be specified, but the range of P> 0 (positive pressure) on the right side of the point of P = 0 in FIG. The target current value may be set in a range of (negative pressure). Alternatively, the target current value may be set as an arbitrary constant. In this case, the control unit 11 controls the air supply path 7 (or the exhaust path) so that the current value of the air supply motor (or the exhaust motor) detected by the current detection unit 17 is within a predetermined range of the target current value. 8) The opening area of the air volume adjusting damper provided in the inside may be changed. Furthermore, in this case, the control unit 11 controls the current value of the air supply motor (or exhaust motor) while controlling the rotation speed of the air supply motor (or exhaust motor) to be constant at a predetermined speed. May be changed in the opening area of the air volume adjustment damper provided in the air supply path 7 (or the exhaust path 8) so that the current falls within a predetermined range of the target current value.

Also, if the air volume is not controlled at a constant level, the rotation speeds of the air supply motor and the exhaust motor need not be detected. In this case, the control unit 11 detects the current value of the air supply motor (or the exhaust motor) and the opening area of the air volume adjustment damper (or the angle of the air volume adjustment damper).

Further, when the air volume is not controlled at a constant level and a rotation speed detection unit (not shown) is provided, the current values of the air supply motor and the exhaust motor may not be detected. In this case, the control unit 11 detects the rotation speed of the air supply motor (or the exhaust motor) and the opening area of the air volume adjustment damper (or the angle of the air volume adjustment damper). For example, the control unit 11 operates the current value of the air supply motor (or the exhaust motor) at a constant value, and the rotational speed of the air supply motor (or the exhaust motor) falls within a predetermined range of the target rotational speed. In this way, the damper opening area (opening ratio) of the air volume adjusting damper 15 may be adjusted to determine the damper angle.

Further, the control unit 11 causes the current value of the air supply motor (or the exhaust motor) to be the current value of the air supply motor (or the exhaust motor) that outputs a predetermined air volume at a predetermined external static pressure. The air volume adjusting damper 15 provided in the air supply path 7 or the air volume adjusting damper 16 provided in the exhaust path 8 may be operated.

(Embodiment 2)
Next, the heat exchange type ventilation apparatus of Embodiment 2 is demonstrated.

When connecting the air supply path (or exhaust path) of a conventional heat exchange type ventilator and the circulation air path of unitary air conditioning (unitary air conditioning), the unitary air conditioner communicates with the outside air through the heat exchange type ventilator. If outside air is introduced during operation, the efficiency of temperature adjustment of the unitary air conditioning may be reduced compared to the case where indoor air is circulated without introducing outside air.

Therefore, in the second embodiment, when the room temperature is not within a predetermined range with respect to the set temperature of the unitary air conditioning, a heat exchange type ventilation device capable of increasing the temperature regulation efficiency of the unitary air conditioning by suppressing the introduction of the outside air is realized. The purpose is to do.

In order to achieve this object, the heat exchange ventilator according to the second embodiment includes an air supply fan provided with an air supply motor, an exhaust air fan provided with an exhaust motor, and an air supply fan. The air supply path to be blown from the outside to the room by the air, the exhaust path to be blown from the room to the outside by the exhaust fan, and the air supply path and the exhaust path are provided at the intersecting positions. A heat exchange element for exchanging heat when ventilating the air and an air supply air volume adjusting damper provided in the air supply path. In the heat exchange ventilator, the control unit controls ON / OFF of the air supply blower, ON / OFF of the exhaust air blower, and opening / closing of the air supply air amount adjustment damper. The air supply path is directly connected to a circulation air path of unitary air conditioning, and the exhaust path is directly connected to an indoor space other than the circulation air path. The heat exchanger type ventilation system is an in exhaust path indoor temperature detector provided on the upstream side of the heat exchange element, the indoor temperature T _i detected by the indoor temperature _detector, set temperature T _u of the unitary air-conditioning When the predetermined temperatures are α ₁ and α ₂ , the control unit determines that “unitary air conditioning is ON” and “T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i ”. Is controlled to be “OFF” and “the supply air volume adjustment damper is closed”. In addition, when “unitary air conditioning is ON” and “T _u −α ₁ <T _i <T _u + α ₂ ”, the control unit determines that “the exhaust fan is ON” and “the supply air volume adjustment damper is open”. It is characterized by controlling to become. This achieves the intended purpose.

The heat exchange ventilator according to the second embodiment can increase the temperature control efficiency of unitary air conditioning by suppressing the introduction of outside air when the room temperature is not within a predetermined range with respect to the set temperature of unitary air conditioning.

Also, by suppressing the introduction of outside air during unitary air conditioning operation, the load on unitary air conditioning can be reduced and the power consumption of unitary air conditioning can be reduced, and the indoor environment can be quickly conditioned to quickly realize a comfortable environment.

Regarding the heat exchange type ventilator of the second embodiment, the internal configuration, the air supply path, and the exhaust path will be described with reference to FIG.

FIG. 5 is a top sectional view showing the heat exchange type ventilator according to the second embodiment. As shown in FIG. 5, the heat exchange type ventilator 101 includes an outside air inlet 102, an indoor air outlet 103 on the side surface of the box-shaped main body, and an outside air inlet 104 on the side surface facing the side surface, An air inlet 105 is provided.

The heat exchange type ventilator 101 sucks fresh outdoor air (supply air) from the side outside air inlet 102, passes through the heat exchange element 106 inside the heat exchange type ventilator 101, and from the outside air inlet 104. An air supply path 107 for supplying the room is provided.

In addition, the heat exchange type ventilator 101 sucks contaminated indoor air (exhaust air) from the indoor air suction port 105, passes through the heat exchange element 106, and exhausts it through the indoor air exhaust port 103 to the outside. I have. At this time, the heat exchange element 106 has a heat recovery function of supplying the heat amount of the exhausted air to the supplied air or supplying the heat amount of the supplied air to the heat amount of the exhausted air. Have.

Fresh outdoor air (supply air) introduced from the outside air inlet 102 and contaminated indoor air (exhaust air) introduced from the indoor air inlet 105 are an air supply fan 109 and an exhaust fan 110. , The air flows through the air supply path 107 and the exhaust path 108, respectively.

The heat exchange element 106 is disposed at a position where the air supply path 107 and the exhaust path 108 intersect. An air purifying filter 112 is disposed on each of the outdoor air suction side and the indoor air suction side of the heat exchange element 106. The outside air inlet 102, the indoor air outlet 103, the outside air inlet 104, and the indoor air inlet 105 are each configured to be connected to a duct.

An indoor temperature detector 113 for detecting the indoor temperature is provided in the exhaust path 108 and upstream of the heat exchange element 106.

Here, the characteristic part in the present embodiment, that is, the air volume adjustment damper operation and the product operation of the control unit 111 will be described.

FIG. 6 is a diagram showing the construction of the heat exchange type ventilator of the second embodiment. The unitary air conditioner 114 is installed in a machine room or the like in the building, and is connected to the room by a duct to form a circulation air path 115 in the room.

The unitary air conditioner 114 controls the interior to a predetermined temperature by performing cooling and heating so that the set indoor temperature is achieved, blowing air to the circulation air passage 115, and circulating air in a plurality of indoor rooms. To do.

The normal circulation air path is a temperature control path through the unitary air conditioner 114, indoor ventilation is not performed, and there is no supply of fresh outdoor air indoors. Therefore, by connecting the air supply path 107 to the circulation air passage 115, the heat is exchanged at the same time while adjusting the temperature by indoor circulation, and the outdoor fresh air is taken in indoors while collecting heat. At this time, the air supply path 107 on the downstream side of the heat exchange element 106 is connected to the circulation air path 115 of the unitary air conditioner 114.

At this time, the unitary air conditioner 114 performs indoor circulation operation, but negative pressure is applied to the outside air supply port 104 of the heat exchange type ventilator 101 by the air blowing function of the unitary air conditioner 114. As a result, the air supply path 107 of the heat exchange type ventilator 101 is pulled by the unitary air conditioner 114, and the air volume more than the design flows. Therefore, particularly in the winter, a large amount of low temperature outside air may flow and cause problems such as condensation. In order to suppress this, a supply air volume adjustment damper 116 for canceling the negative pressure from the unitary air conditioner 114 between the heat exchange type ventilation device 101 and the circulation air path 115 of the unitary air conditioner 114 in the air supply path 107. Is provided. The supply air volume adjustment damper 116 determines the damper angle by adjusting the opening area (opening ratio) so as to be a predetermined air volume while actually measuring the supply air volume of the heat exchange type ventilator 101.

While the temperature is adjusted indoorly by the unitary air conditioner 114, heat exchange air is simultaneously produced by the heat exchange type ventilator 101, and ventilation that is taken indoors while collecting fresh outdoor air can be performed.

On the other hand, especially when the unitary air conditioning 114 is activated, when the temperature of the room is adjusted to the set temperature, the introduction of outside air after heat exchange into the circulation air passage 115, for example, during heating in the winter, may cause the circulation operation. In comparison, the air conditioning load is increased, and the time for the room to reach the set temperature is increased.

This is also true during the cooling season in summer. That is, introduction of outside air after heat exchange during cooling in the summer increases the air conditioning load compared to the circulation operation, and the time for the room to reach the set temperature becomes longer.

FIG. 7 is a control block diagram of the heat exchange ventilator according to the second embodiment.

In this embodiment, as shown in FIG. 7, the control unit 111 controls the air supply fan 109, the exhaust air blower 110, and the air supply air amount adjustment damper 116. By suppressing the introduction of outside air during the operation of the unitary air conditioner 114, the load on the unitary air conditioner 114 can be reduced and the power consumption of the unitary air conditioner 114 can be reduced, and the indoor environment can be quickly conditioned to quickly realize a comfortable environment.

The control unit 111 performs control by comparing the room temperature obtained from the room temperature detection unit 113 with the set temperature of the unitary air conditioner 114.

Specifically, the control operation of FIG. 7 will be described. In FIG. 7, the room temperature detected by the room temperature detector 113 is T _i , the set temperature of the unitary air conditioner 114 is T _u , and the predetermined temperatures are α ₁ and α ₂ .

The heat exchange type ventilator 101 is not operated while the unitary air conditioning 114 is stopped.

When starting the unitary air conditioner 114 for adjusting the room temperature, the heat exchange ventilator 101 does not immediately start the heat exchange air operation.

First, the control unit 111 activates only the exhaust air blower 110 while closing the supply air volume adjustment damper 116 in the supply air path 107 and introduces indoor air into the heat exchange type ventilator 101.

When the room temperature T _i is detected by the room temperature detection unit 113 in the heat exchange type ventilator 101 and T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i , the control unit 111 it is determined that the temperature T _i has not reached the unitary air conditioning set temperature T _u close. The control unit 111 controls the exhaust fan 110 to stop and the supply air volume adjustment damper 116 to be closed.

As a result, the unitary air conditioner 114 is circulated indoors. T ₁ hour after the circulation operation of only the unitary air conditioner 114 continues for a predetermined time, to start the air discharge fan 110 again detects the indoor temperature T _i at the indoor temperature detection unit 113.

At this time, if T _u −α ₁ <T _i <T _u + α ₂ , the control unit 111 determines that the room temperature T _i has reached the unitary air conditioning set temperature T _u . Then, the control unit 111 controls the exhaust air blower 110 and the air supply fan 109 to start and the air supply air volume adjustment damper 116 is opened.

Thus, after the room temperature reaches near the set temperature T _u of the unitary air conditioner 114 starts the heat exchange type ventilator 101, outdoor fresh air can continue ventilation to incorporate indoors while heat recovery. Thereafter, when T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i , the control unit 111 determines that the room temperature T _i has not reached near the unitary air conditioning set temperature T _u . Then, the control unit 111 controls the exhaust blower 110 to stop and the supply air amount adjustment damper 116 to be closed, and performs the indoor circulation operation again with only the unitary air conditioning 114 for t ₁ hour.

When the set temperature _{T u} of the unitary air conditioner 114 is changed in the middle, the control unit 111 detects the indoor temperature _{T i} at the indoor temperature detection unit _113, at _{T u -α 1 <T i <} T u + α 2 Check if it exists. When T _u −α ₁ <T _i <T _u + α ₂ , the control unit 111 opens the supply air volume adjustment damper 116 again, operates the supply air fan 109 and the exhaust air fan 110, and performs heat exchange operation. Continue.

Then, if the set temperature T _u is not changed, the control unit 111, the ₂ hours after a predetermined time t, detect the indoor temperature T _i again confirms the indoor environment. When T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i , the control unit 111 closes the supply air volume adjustment damper 116, stops the supply air fan 109 and the exhaust air fan 110, and unitary The air conditioner 114 is circulated to adjust the indoor temperature.

By performing the control shown in FIG. 7, the indoor environment thermostated with a small load to a set temperature T _u Near unitary air conditioner 114, upon reaching room environment near the target temperature, performs heat exchange of gas operation, the heat recovery A comfortable environment can be realized while saving energy while taking in fresh air.

In FIG. 7, the air supply fan is turned off when “T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i ”, but the air supply fan may be left on. This is because the supply air volume adjustment damper is closed, so that the supply air can be stopped even if the supply air blower is turned on.

FIG. 8 is a diagram showing another construction of the heat exchange type ventilation apparatus of the second embodiment.

As shown in the drawing showing another construction in FIG. 4, the exhaust passage 108 may be connected to the indoor circulation air passage 115. The unitary air conditioner 114 performs indoor circulation operation, but negative pressure is applied to the indoor air suction port 105 of the heat exchange type ventilator 101 by the air blowing function of the unitary air conditioner 114. As a result, the design air volume cannot flow through the exhaust path 108 of the heat exchanging ventilator 101 while being pulled by the unitary air conditioner 114. Therefore, especially in the winter season, it is difficult for the high-temperature indoor airflow to flow with respect to the low-temperature outdoor airflow, and the outside air that does not exchange heat may flow directly into the room through the air supply path 107, causing problems such as dew condensation and cold wind. There is. In order to suppress this, an exhaust air volume adjustment damper 117 for canceling the negative pressure from the unitary air conditioner 114 is provided between the heat exchange ventilator 101 and the circulation air path 115 of the unitary air conditioner 114 in the exhaust path 108. . The exhaust air volume adjustment damper 117 determines the damper angle by adjusting the opening area (opening ratio) so as to be a predetermined air volume while actually measuring the exhaust air volume of the heat exchange ventilator 101.

FIG. 9 is a control block diagram of the heat exchange type ventilator of FIG.

Specifically, the control operation of FIG. 9 will be described. In FIG. 9, the room temperature detected by the room temperature detector 113 is T _i , the set temperature of the unitary air conditioner 114 is T _u , and the predetermined temperatures are α ₁ and α ₂ .

The heat exchange type ventilator 101 is not operated while the unitary air conditioning 114 is stopped.

When the unitary air conditioner 114 is activated to adjust the room temperature, the heat exchange ventilator 101 does not immediately start the heat exchange air operation.

First, the control unit 111 closes the supply air volume adjustment damper 116 in the supply air path 107, opens the exhaust air volume adjustment damper 117 in the exhaust path 108, activates only the exhaust fan 110, and heat-exchanges the room air. Introduce into the device 101.

When the room temperature T _i is detected by the room temperature detection unit 113 in the heat exchange type ventilator 101 and T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i , the control unit 111 it is determined that the temperature T _i has not reached the unitary air conditioning set temperature T _u close. Then, the control unit 111 controls the exhaust fan 110 to stop and the supply air volume adjustment damper 116 and the exhaust air volume adjustment damper 117 to be closed.

As a result, the unitary air conditioner 114 is circulated indoors. T ₁ hour after the circulation operation of only the unitary air conditioner 114 continues for a predetermined time, to start the air discharge fan 110 again open the exhaust air flow control damper 117, to detect the indoor temperature T _i at the indoor temperature detection unit 113.

At this time, if T _u −α ₁ <T _i <T _u + α _2, it is determined that the room temperature T _i has reached the unitary air conditioning set temperature T _u , and the exhaust blower 110 and the air supply blower 109 are determined. And the supply air volume adjustment damper 116 and the exhaust air volume adjustment damper 117 are controlled to open.

Thus, after the indoor temperature T _i has reached the set temperature T _u Near unitary air conditioner 114, to start the heat exchange type ventilator 101, outdoor fresh air can continue ventilation to incorporate indoors while heat recovery. Thereafter, when T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i , the control unit 111 determines that the room temperature T _i has not reached the unitary air conditioning set temperature T _u , The supply air volume adjustment damper 116 and the exhaust air volume adjustment damper 117 are controlled to be closed, and the indoor circulation operation is performed again for t ₁ hours using only the unitary air conditioning 114.

When the set temperature _{T u} of the unitary air conditioner 114 is changed in the middle, the control unit 111 detects the indoor temperature _{T i} at the indoor temperature detection unit _113, at _{T u -α 1 <T i <} T u + α 2 Check if it exists. When T _u −α ₁ <T _i <T _u + α ₂ , the control unit 111 opens the supply air volume adjustment damper 116 and the exhaust air volume adjustment damper 117 again, and opens the supply air fan 109 and the exhaust air fan 110. Operate and continue heat exchange operation.

Then, if the set temperature T _u is not changed, the control unit 111, the ₂ hours after a predetermined time t, detect the indoor temperature T _i again confirms the indoor environment. When T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i , the control unit 111 closes the supply air amount adjustment damper 116 and the exhaust air amount adjustment damper 117, and supplies the supply air fan 109 and the exhaust air blower. 110 is stopped, the unitary air-conditioning 114 is circulated, and the room temperature is adjusted.

By performing the control shown in FIG. 9, first, the indoor environment thermostated with a small load to a set temperature T _u Near unitary air conditioner 114, upon reaching room environment near the target temperature, performs heat exchange of gas operation, the heat recovery A comfortable environment can be realized while saving energy while taking in fresh air.

In FIG. 9, when “T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i ”, the air supply fan and the exhaust fan are turned off, but the air supply fan and / or the exhaust fan are turned off. The blower may be left on. This is because the supply air volume adjustment damper and the exhaust air volume adjustment damper are closed, so that supply and exhaust can be stopped even if the supply air fan and / or the exhaust air fan are turned on. .

FIG. 10 is a diagram showing another construction of the heat exchange type ventilation apparatus of the second embodiment.

As shown in FIG. 10, the supply air volume adjustment damper 116 and the exhaust air volume adjustment damper 117 may be provided inside the main body of the heat exchange type ventilator 101.

Although not shown, the air supply air volume adjustment damper 116 of FIG. 6 may be provided inside the main body of the heat exchange type ventilator 101.

The following supplements the present embodiment.

The unitary air conditioning 114 (unitary air conditioning) includes the concept of the whole building air conditioning or the central air conditioning (central air conditioning).

Moreover, although the control part 111 was provided in the heat exchange type ventilator 101, it does not need to be provided in the heat exchange type ventilator 101. In this case, control is performed by the control unit 111 located at a position away from the heat exchange ventilator 101.

Α ₁ is a constant that can take any value of 1 ° C., for example, 0.1 ° C. to 3 ° C.

Α ₂ is a constant that can take any value of 1 ° C., for example, 0.1 ° C. to 3 ° C.

Also, “the supply air volume adjustment damper is closed” includes the case where the supply air volume adjustment damper is fully closed. “The exhaust air volume adjustment damper is closed” includes the case where the exhaust air volume adjustment damper is fully closed.

In addition, the heat exchange type ventilator 101 is not operated while the unitary air conditioner 114 is stopped, but the heat exchange type ventilator 101 can be operated even when the unitary air conditioner 114 is stopped. In this case, if a communication port communicating with the room is separately provided in the circulation air passage 115, an air passage that does not pass through the unitary air conditioning 114 can be formed, so that a smooth heat exchange operation can be performed. At this time, it is preferable that the communication port provided in the circulation air passage 115 can be opened and closed, and is closed when the unitary air conditioning is ON, and is preferably open when the unitary air conditioning is OFF.

In Embodiment 2, the air supply path 107 is connected to the circulation air passage 115 on the upstream side of the unitary air conditioning 114, but may be connected to the circulation air passage 115 on the downstream side of the unitary air conditioning 114.

As mentioned above, although the heat exchange type ventilator which concerns on this invention was demonstrated based on embodiment, this invention is not limited to embodiment. Unless it deviates from the meaning of this invention, the form which carried out the various deformation | transformation which those skilled in the art can think to this embodiment, and the structure constructed | assembled combining the component in different embodiment is also contained in the scope of the present invention. .

The ventilator according to the present invention is also effective as a duct type ventilator for the purpose of exchanging heat between the outside air and room air, a duct type air conditioner or the like.

DESCRIPTION OF SYMBOLS 1,101 Heat exchange type ventilator 2,102 Outside air inlet 3,103 Indoor air outlet 4,104 Outside air inlet 5,105 Indoor air inlet 6,106 Heat exchange element 7,107 Air supply path 8,108 Exhaust path 9,109 Supply air blower 10,110 Exhaust air blower 11,111 Control unit 12,112 Air purifying filter 13 Unitary air conditioning 14 Circulating air path 15 Air volume adjustment damper 16 Air volume adjustment damper 17 Current detection unit 113 Indoor temperature detection unit 114 Unitary air conditioning 115 Circulating air path 116 Supply air volume adjustment damper 117 Exhaust air volume adjustment damper 202 Outside air supply port 203 Heat exchange element 209 Supply air blower 210 Exhaust air blower

Claims (12)

1. An air supply fan equipped with an air supply motor;
   An exhaust fan equipped with an exhaust motor;
   An air supply path to be blown indoors from the outside by the air supply fan;
   An exhaust path for blowing air from the room to the outside by the exhaust fan;
   A heat exchange element provided at a position where the air supply path and the exhaust path intersect, and for exchanging heat when ventilating indoor air and outdoor air;
   In a heat exchange type ventilator provided with a current detection unit that detects a current flowing through the air supply motor,
   The controller controls the rotation speed of the air supply motor,
   The air supply path is connected to a circulation air path of unitary air conditioning,
   The control unit changes an opening area of an air volume adjustment damper provided in the air supply path so that a current value of the air supply motor detected by the current detection unit is within a predetermined range of a target current value. A heat exchange type ventilator characterized in that
2. The control unit controls the supply motor so that the rotation speed is constant at a predetermined rotation speed, so that the current value of the supply motor is within a predetermined range of a target current value. The heat exchange type ventilator according to claim 1, wherein an opening area of the air volume adjusting damper is changed.
3. An air supply fan equipped with an air supply motor;
   An exhaust fan equipped with an exhaust motor;
   An air supply path to be blown indoors from the outside by the air supply fan;
   An exhaust path for blowing air from the room to the outside by the exhaust fan;
   A heat exchange element provided at a position where the air supply path and the exhaust path intersect, and for exchanging heat when ventilating indoor air and outdoor air;
   In a heat exchange ventilator provided with a current detection unit that detects a current flowing through the exhaust motor,
   The controller controls the rotational speed of the exhaust motor,
   The exhaust path is connected to a circulation air path of unitary air conditioning,
   The control unit changes an opening area of an air volume adjustment damper provided in the exhaust path so that a current value of the exhaust motor detected by the current detection unit is within a predetermined range of a target current value. A heat exchange type ventilator.
4. The control unit controls the air volume so that the current value of the exhaust motor is within a predetermined range of a target current value while controlling the rotation speed of the exhaust motor to be constant at a predetermined rotation speed. The heat exchange type ventilator according to claim 3, wherein the opening area of the damper is changed.
5. An air supply fan equipped with an air supply motor;
   An exhaust fan equipped with an exhaust motor;
   An air supply path to be blown indoors from the outside by the air supply fan;
   An exhaust path for blowing air from the room to the outside by the exhaust fan;
   A heat exchange element provided at a position where the air supply path and the exhaust path intersect, and for exchanging heat when ventilating indoor air and outdoor air;
   In a heat exchange type ventilator provided with an air supply air volume adjustment damper provided in the air supply path, the controller turns ON / OFF the air supply fan, ON / OFF the exhaust fan, and the Control the opening / closing of the air supply adjustment damper,
   The air supply path is directly connected to the circulation air path of unitary air conditioning,
   The exhaust path is directly connected to an indoor space other than the circulation air path,
   An indoor temperature detector is provided in the exhaust path and upstream of the heat exchange element,
   When the indoor temperature detected by the indoor temperature detector is T _i , the unitary air conditioning set temperature is T _u , and the predetermined temperatures are α ₁ and α ₂ ,
   The controller is
   When “the unitary air conditioning is ON” and “T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i ”, “the exhaust fan is OFF” and “the supply air amount adjustment damper is closed” Control to be
   When “the unitary air conditioning is ON” and “T _u −α ₁ <T _i <T _u + α ₂ ”, “the exhaust fan is ON” and “the supply air amount adjustment damper is open”. A heat exchange type ventilator characterized by being controlled.
6. The controller is
   When “the unitary air conditioning is ON” and “T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i ”, control is performed so that “the air supply fan is OFF”. The heat exchange ventilator according to claim 5.
7. The controller is
   If the set temperature _{T u} of the unitary air-conditioning has been changed, to see if it meets the _{"T u -α 1 <T i <} T u + α 2 " again,
   When “the unitary air conditioning is ON” and “T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i ”, “the exhaust fan is OFF” and “the supply air amount adjustment damper is closed” Control to be
   When “the unitary air conditioning is ON” and “T _u −α ₁ <T _i <T _u + α ₂ ”, “the exhaust fan is ON” and “the supply air amount adjustment damper is open”. The heat exchange type ventilator according to claim 5, wherein the heat exchange type ventilator is controlled.
8. An air supply fan equipped with an air supply motor;
   An exhaust fan equipped with an exhaust motor;
   An air supply path to be blown indoors from the outside by the air supply fan;
   An exhaust path for blowing air from the room to the outside by the exhaust fan;
   A heat exchange element provided at a position where the air supply path and the exhaust path intersect, and for exchanging heat when ventilating indoor air and outdoor air;
   An air supply amount adjustment damper provided in the air supply path;
   In a heat exchange type ventilator provided with an exhaust air volume adjustment damper provided in the exhaust path, the controller turns ON / OFF the air supply fan, ON / OFF the exhaust air fan, and the air supply air volume. Controlling the opening / closing of the adjusting damper and the opening / closing of the exhaust air volume adjusting damper;
   The air supply path is directly connected to the circulation air path of unitary air conditioning,
   The exhaust path is directly connected to the circulation air path,
   An indoor temperature detector is provided in the exhaust path and upstream of the heat exchange element,
   When the indoor temperature detected by the indoor temperature detector is T _i , the unitary air conditioning set temperature is T _u , and the predetermined temperatures are α ₁ and α ₂ ,
   The controller is
   When “the unitary air conditioning is ON” and “T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i ”, “the supply air volume adjustment damper is closed” and “the exhaust air volume adjustment damper is closed” "
   When “the unitary air conditioning is ON” and “T _u −α ₁ <T _i <T _u + α ₂ ”, “the air supply fan is ON” and “the exhaust fan is ON” and “the air supply is ON” The heat exchange type ventilator is controlled so that the air volume adjustment damper is open and the exhaust air volume adjustment damper is open.
9. The controller is
   When “unitary air-conditioning is ON” and “T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i ”, control is performed so that “the supply blower and the exhaust blower are OFF”. The heat exchange type ventilator according to claim 8.
10. The controller is
    When “unitary air-conditioning is ON” and “T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i ”, control is performed so that “the supply air blower or the exhaust air blower is OFF”. The heat exchange type ventilator according to claim 8.
11. The controller is
    If the set temperature _{T u} of the unitary air-conditioning has been changed, to see if it meets the _{"T u -α 1 <T i <} T u + α 2 " again,
    When “the unitary air conditioning is ON” and “T _i ≦ T _u −α ₁ or T _u + α ₂ ≦ T _i ”, “the supply air volume adjustment damper is closed” and “the exhaust air volume adjustment damper is closed” "
    When “the unitary air conditioning is ON” and “T _u −α ₁ <T _i <T _u + α ₂ ”, “the air supply fan is ON” and “the exhaust fan is ON” and “the air supply is ON” 9. The heat exchange type ventilator according to claim 8, wherein control is performed such that the air volume adjustment damper is open and the exhaust air volume adjustment damper is open.
12. A housing for storing the air supply fan, the exhaust air fan, and the heat exchange element;
    The heat exchange type ventilation apparatus according to claim 8, wherein the supply air volume adjustment damper is provided inside the casing.

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