WO2013157246A1

WO2013157246A1 - Heat-exchange type ventilation apparatus

Info

Publication number: WO2013157246A1
Application number: PCT/JP2013/002556
Authority: WO
Inventors: 耕次飯尾
Original assignee: パナソニック株式会社
Priority date: 2012-04-16
Filing date: 2013-04-16
Publication date: 2013-10-24
Also published as: CN104136857A; CN104136857B; JP2013221657A; JP6035509B2

Abstract

A heat-exchange type ventilation apparatus (1) has a heat-exchange element (11) disposed in a position where an air-supply blower channel (6) and an exhaust blower channel (7) intersect. The heat-exchange type ventilation apparatus (1) is also provided with an air-channel shield (12), an in-room humidity meter (13), and a controller (28). The controller (28) is provided with an exhaust operation mode for reducing the introduction of outside air (24) to the heat-exchange element (11) when the value of the in-room humidity meter (13) exceeds a first predetermined value.

Description

Heat exchange ventilator

The present invention relates to a heat exchange type ventilator.

A conventional heat exchange type ventilator that exchanges heat between outside air and room air forcibly exhausts room air to the outside from an indoor exhaust port provided on the lower surface of the main body (see, for example, Patent Document 1).

Hereinafter, a conventional heat exchange type ventilator will be described with reference to FIG. FIG. 9 is a side sectional view showing a conventional heat exchange type ventilator. As shown in FIG. 9, the ventilator main body 101 introduces fresh outside air from the outside air inlet (not shown) of the building by the air supply fan 102, and takes it in from the outside air inlet 103 through the duct. The ventilator main body 101 blows outside air from the main body air supply port 105 through the heat exchange element unit 104 incorporated therein, and supplies the outside air from the indoor air supply port to the room through the duct.

In such a conventional heat exchange type ventilator, when the indoor air becomes high humidity (for example, assumed to be used in a bathroom), moisture adheres to the heat exchange element unit 104 on the exhaust air passage side of the heat exchange element unit 104. . Then, the moisture comes into contact with low temperature outside air through the heat exchange element unit 104. Therefore, freezing occurs in the heat exchange element unit 104. Moreover, since the indoor air which became high humidity contacts the low temperature external air via the heat exchange element part 104, and it cools rapidly, there existed a subject that dew condensation generate | occur | produced.

JP 2005-106427 A

The heat exchange type ventilator according to the present invention has a supply air passage through which outside air is blown into the room from outside by an air supply fan, and an exhaust ventilation path through which room air is blown from the room to the outside by an exhaust fan. Prepared in. And the heat exchange element part is arrange | positioned in the position where an air supply ventilation path and an exhaust ventilation path cross | intersect. In addition, the heat exchange type ventilator includes an air passage shielding portion provided with an opening upstream from the heat exchange element portion of the supply air blowing path, an indoor humidity measuring portion that measures indoor humidity, and opening and closing of the air passage shielding portion. And a control unit for switching between. The control unit has an exhaust operation mode in which the opening is closed when the value of the indoor humidity measurement unit exceeds the first predetermined value, and introduction of outside air into the heat exchange element unit is reduced.

In such a heat exchange type ventilator, the contact between the cold air and the high humidity air in the heat exchange element is suppressed, and condensation and freezing in the heat exchange element are prevented.

FIG. 1 is a lower perspective view showing a heat exchange type ventilator according to an embodiment of the present invention. FIG. 2 is a side cross-sectional view showing the heat exchange type ventilator. FIG. 3 is a partial perspective view showing an exhaust air blowing path of the heat exchange type ventilator. FIG. 4 is a partial perspective view showing an air passage shielding portion of the heat exchange type ventilator. FIG. 5 is a perspective view showing an air passage shielding portion of the heat exchange type ventilator. FIG. 6 is an exploded perspective view showing an air passage shielding portion of the heat exchange type ventilator. FIG. 7 is a partial perspective view in the case where a heater is provided in the heat exchange type ventilator. FIG. 8 is a perspective view in the case where a heater is provided in the air passage shielding portion of the heat exchange type ventilator. FIG. 9 is a side sectional view showing a conventional heat exchange type ventilator.

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

(Embodiment)
With respect to the heat exchange type ventilator according to the embodiment of the present invention, an internal configuration, an air supply air passage, and an exhaust air passage will be described with reference to FIGS.

FIG. 1 is a lower perspective view showing a heat exchange type ventilator according to an embodiment of the present invention. As shown in FIG. 1, the heat exchange ventilator 1 is provided with an indoor air inlet 5 at a lower portion of a box-shaped main body 1 a and an outdoor air inlet 2 and an indoor air outlet 3 on one side surface. And the external air supply port 4 is provided in the side surface opposite to the side surface in which the external air inlet 2 and the indoor air exhaust port 3 were provided.

FIG. 2 is a side sectional view showing the heat exchange type ventilator according to the embodiment of the present invention. As shown in FIG. 2, the heat exchange ventilator 1 sucks fresh outside air 24 from the outside air inlet 2. The outside air 24 is supplied from the outside air supply port 4 to the room 27 through the heat exchange element 11 inside the heat exchange type ventilator 1 and the supply air blowing path 6.

FIG. 3 is a partial perspective view showing an exhaust air blowing path of the heat exchange type ventilator according to the embodiment of the present invention. As shown in FIG. 3, the contaminated indoor air 25 is sucked from the indoor air suction port 5, passes through the heat exchange element 11 and the exhaust air blowing path 7, and is exhausted from the indoor air exhaust port 3 to the outdoor 26. At this time, the heat exchange element unit 11 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 exhausted air. ing.

As shown in FIG. 2, the outside air 24 and the indoor air 25 are supplied by an air supply fan path 6 and an exhaust fan path 9 by an air supply fan 8 and an exhaust fan 9 attached to the rotating shaft 10 a of one electric motor 10, respectively. 7 and flow. That is, in the air supply / air flow path 6, the outside air 24 is blown from the outdoor 26 to the indoor 27 by the air supply fan 8. In the exhaust air blowing path 7, the indoor air 25 is blown from the indoor 27 to the outdoor 26 by the exhaust fan 9. As described above, the air supply / air passage 6 and the exhaust air passage 7 are provided in the main body 1a.

Further, the heat exchange element unit 11 is arranged at a position where the supply air blowing path 6 and the exhaust ventilation path 7 intersect. The supply fan 8 and the exhaust fan 9 are sirocco impellers having the same performance.

Also, the outside air inlet 2, the room air outlet 3, and the outside air inlet 4 are each configured to be connected to a duct (not shown). The ducts respectively connected to the outside air inlet 2 and the room air outlet 3 are routed to the outer wall surface of the building and communicate with the outside air 24. The duct connected to the outside air supply port 4 communicates with the ceiling surface or wall surface of the living room and supplies outside air 24 to the room 27.

FIG. 4 is a partial perspective view showing an air passage shielding portion of the heat exchange type ventilator according to the embodiment of the present invention. As shown in FIG. 4, an air passage shielding portion 12 is attached to the upstream side of the heat exchange element portion 11 in the air supply / air passage 6. The control unit 28 switches opening and closing of the airway shielding unit 12.

As shown in FIG. 2, the indoor humidity sensor 13 serves as an indoor humidity measuring unit that measures the humidity of the indoor 27 between the indoor air suction port 5 of the exhaust ventilation path 7 and the indoor air suction side of the heat exchange element unit 11. It is attached. As described above, the heat exchange type ventilation device 1 includes the air passage shielding unit 12, the control unit 28, and the indoor humidity sensor 13.

FIG. 5 is a perspective view showing an air passage shielding portion of the heat exchange type ventilator according to the embodiment of the present invention. As shown in FIG. 5, the airway shielding unit 12 includes a holding unit 16 having an opening 15 and a shielding unit 14. The air path shielding part 12 is installed without a gap in the air supply / air blowing path 6 shown in FIG. As a result, all the outside air 24 passes through the opening 15 of the airway shielding unit 12.

FIG. 6 is an exploded perspective view showing an air passage shielding portion of the heat exchange type ventilator according to the embodiment of the present invention. As shown in FIG. 6, the airway shielding unit 12 holds the shielding unit motor 18 in the holding unit 16 with a motor holding cover 19. A gear 17 is attached to the rotating shaft of the shielding portion motor 18. The shielding part 14 is provided with a linear gear meshing with the gear 17 at the edge. The shielding unit 14 is held by the holding unit 16 by the cover 20. The shielding portion motor 18 slides the shielding portion 14 by its rotation, and adjusts the opening degree of the opening portion 15 from fully closed to fully open. The opening 15 can shut off the introduction of the outside air 24 by closing the shielding part 14, and can eliminate the supply air volume. Therefore, the introduction of the outside air 24 is blocked to the heat exchange element unit 11 shown in FIG.

The operation of the heat exchange type ventilator 1 of the present embodiment having the above configuration will be described. The heat exchange type ventilator 1 shown in FIG. 2 has ducts connected to the outside air inlet 2, the room air outlet 3, and the outside air inlet 4 after construction. The duct connected to the outside air inlet 2 and the room air outlet 3 is routed to the outside wall surface of the building and communicates with the outside air 24. The duct connected to the outside air supply port 4 communicates with the ceiling surface or wall surface of the living room and supplies outside air 24 to the room 27.

(Normal operation mode)
The heat exchange ventilator 1 shown in FIG. 2 normally operates the electric motor 10 with the air passage shield 12 opened. That is, the control unit 28 has such a “normal operation mode”. At this time, air-conditioned indoor air 25 is sent to the exhaust air blowing path 7, and cold (in some cases, warm) outside air 24 is sent to the air supply / air blowing path 6. In the heat exchange element unit 11, heat exchange between the room air 25 and the outside air 24 is performed. The outside air 24 is warmed (or cooled) and supplied to the room 27.

(Exhaust operation mode)
When the indoor air 25 becomes high humidity and the heat exchange air operation with the outside air 24 is continued as it is, if the outside air 24 is at a low temperature, the high humidity indoor air that comes into contact with the low temperature outside air 24 via the heat exchange element section 11 is used. 25 is cooled rapidly. The cooled high-humidity indoor air 25 condenses when it reaches the dew point temperature, and moisture adheres to the element surface of the heat exchange element section 11. In addition, when the outside air 24 is at a very low temperature, moisture that has condensed and adhered freezes, fills the exhaust ventilation path 7 and cannot exhaust.

Therefore, when the indoor humidity sensor 13 detects that the humidity in the room 27 has increased to a predetermined humidity, the motor 18 for the shielding part of the airway shielding part 12 shown in FIG. Close part 15. That is, the control unit 28 closes the opening 15 when the value of the indoor humidity sensor 13 exceeds a first predetermined value (first indoor humidity set value), and the outside air 24 to the heat exchange element unit 11 shown in FIG. It has an “exhaust operation mode” that reduces the introduction. Here, the first predetermined value is the indoor humidity setting value, which is a value set by the user according to the user's preference. For example, the first predetermined value is a value within a humidity range of 40% to 60% that is considered comfortable for residents.

Thereby, introduction of the outside air 24 into the heat exchange element unit 11 is reduced. And the heat exchange type ventilation apparatus 1 is switched to the operation | movement only of exhaust ventilation, and the dew condensation and freezing inside the heat exchange element part 11 are suppressed. Furthermore, since a sirocco-type impeller is used for the air supply fan 8, the work amount of the air supply fan 8 is reduced when the air supply air passage 6 is closed. As a result, the work amount of the exhaust fan 9 attached to the opposite side of the rotating shaft 10a of the electric motor 10 is increased, and moisture in the room 27 is efficiently discharged. Thus, according to the heat exchange type ventilator 1 of the embodiment of the present invention, condensation and freezing inside the heat exchange element unit 11 are suppressed even when the indoor air 25 is at high humidity.

Further, when it is detected that the humidity in the room 27 has increased to the first predetermined value, the opening 14 may not be fully closed by moving the shielding unit 14 and the opening 15 may be adjusted. That is, the dew condensation inside the heat exchange element unit 11 occurs when the outside air 24 takes away a sufficient amount of heat from the room air 25 during the heat exchange. Therefore, the amount of outside air 24 introduced is suppressed, so that dew condensation and freezing inside the heat exchange element unit 11 are suppressed.

(Element drying mode)
Further, when the operation of only exhaust air blowing is continued after switching to the exhaust operation mode, the indoor air 25 is exhausted and the humidity of the indoor 27 is lowered. The control unit 28 performs the operation of exhausting only the indoor air 25 for a certain period of time when the value of the indoor humidity sensor 13 falls below the second predetermined value (second indoor humidity setting value) in the exhaust operation mode. "Mode" is further provided. In other words, the element drying mode is an exhaust operation mode in which the humidity in the room 27 falls below the second predetermined value and continues for a certain time. Here, the second predetermined value is humidity defining the completion of the exhaust operation mode. In the exhaust operation mode, indoor air 25 with high humidity is exhausted, outside air 24 with low humidity is introduced, and the humidity in the room 27 is reduced. That is, the second predetermined value is a humidity that is difficult to condense even when the indoor air 25 comes into contact with the cold outside air 24 in the heat exchange element unit 11, and is a value smaller than the first predetermined value.

Further, the above-mentioned fixed time is a time determined from the elapsed time of the exhaust operation mode by means such as an integration timer, which is stored in the control unit 28 in advance.

For example, when the temperature of the room 27 is 18 ° C. and the temperature of the outside air 24 is 5 ° C., if the second predetermined value is set to be less than 40%, condensation in the heat exchange element unit 11 hardly occurs. That is, when the value of the indoor humidity sensor 13 falls below the second predetermined value, moisture may adhere to the exhaust air blowing path 7 side of the heat exchange element unit 11. However, since the indoor air 25 is in a dry state with low humidity, the moisture attached to the surface of the heat exchange element 11 when the room air 25 is blown to the heat exchange element 11 is released to the outdoor 26. The After the operation of only the exhaust air blowing in the element drying mode is continued for a certain time, the shielding portion motor 18 shown in FIG. 6 is operated. And the shielding part 14 is moved, the opening part 15 opens, the external air 24 is introduce | transduced into the heat exchange element part 11, and it transfers to the heat exchange air operation of normal operation mode.

Thereby, the heat exchange element unit 11 is sufficiently dried, and there is no adhering moisture, and condensation and freezing of the heat exchange element unit 11 are prevented.

The timing at which the element drying mode is ended is a fixed time in the above, but may be determined by the measured value of the humidity in the room 27. In this case, the control unit 28 stores a third predetermined value (third indoor humidity setting value). The third indoor humidity setting value is smaller than the second indoor humidity setting value described above. If the air flowing through the exhaust ventilation path 7 shown in FIG. 2 is not sufficiently dried, the heat exchange element unit 11 is not dried. For this reason, in the element drying mode, only the indoor air 25 is exhausted until the value of the indoor humidity sensor 13 falls below the third predetermined value after the predetermined time has elapsed. That is, if the humidity in the room 27 falls below the second predetermined value and only the exhaust gas is operated for a fixed time, and the humidity in the room 27 falls below the third predetermined value, the heat exchange element unit 11 is dry. Just judge.

FIG. 7 is a partial perspective view when a heater is provided in the heat exchange type ventilator according to the embodiment of the present invention. As shown in FIG. 7, the heat exchange type ventilator 1 includes a heater 21 that is a heating unit between the outside air inlet 2 and the heat exchange element unit 11 of the supply air blowing path 6. The heater 21 has a passage surface 21 a that is smaller than the cross-sectional area of the air supply / air flow path 6. In addition, an outdoor temperature sensor 22 as an outdoor temperature measuring unit that measures the temperature of the outdoor 26 is provided in the outdoor air inlet 2. As described above, the heat exchange type ventilator 1 includes the heater 21 and the outdoor temperature sensor 22.

FIG. 8 is a perspective view in the case where a heater is provided in the air passage shielding portion of the heat exchange type ventilator according to the embodiment of the present invention. As shown in FIG. 8, the heater 21 is attached to the airway shielding unit 12 by a heater holding unit 23. Then, the outside air 24 passes through the heater 21. When the outdoor temperature sensor 22 detects that the outside air 24 passing through the air supply / air passage 6 shown in FIG. 7 is lower than a predetermined temperature (fourth predetermined value), the heater 21 is operated. Warmed. That is, the controller 28 starts the operation of the heater 21 when the value of the outdoor temperature sensor 22 falls below the fourth predetermined value.

Here, the fourth predetermined value is the temperature of the outside air 24 at which a sufficient temperature rise cannot be obtained only by heat exchange in the heat exchange element unit 11 and it is determined that intake into the room 27 is low. Specifically, the fourth predetermined value is a value between −15 ° C. and 5 ° C. When the outside air 24 falls below the fourth predetermined value, the outside air 24 is heated by the heater 21 and then flows into the heat exchange element unit 11. In this way, freezing does not easily occur in the heat exchange element section 11. Moreover, you may set temperature higher than 0 degreeC according to liking so that the blowing temperature to the room | chamber 27 after heat exchange may not be lowered too much. In this way, cold drafts for residents can be prevented or reduced.

With the above-described configuration, the temperature of the indoor air 25 that comes into contact with the outside air 24 heated via the heat exchange element unit 11 shown in FIG. 7 is increased, and the amount of water vapor that the indoor air 25 can hold is heated by the outside air 24. Increased compared to when not. Therefore, even if the operation of only exhaust for drying the heat exchange element unit 11 is shifted to the heat exchange air operation, condensation and freezing of the heat exchange element unit 11 hardly occur. Moreover, the operation time of only the exhaust which dries the heat exchange element part 11 is shortened, and it switches to heat exchange air operation.

Further, a PTC heater may be used as the heater 21. The PTC heater has a temperature holding performance that changes the resistance value according to the passing wind speed and keeps the heat generation temperature constant. Therefore, even when the operation of the electric motor 10 is stopped due to a failure or the like, the output of the PTC heater does not increase, so that ignition, smoke generation, etc. are less likely to occur, and safety is improved.

Thus, according to the heat exchange type ventilator of the embodiment of the present invention, dew condensation and freezing of the heat exchange element section 11 are suppressed even if the indoor air 25 is at high humidity.

The heat exchange type ventilator of the present invention can be applied to a duct type heat exchange air device and a duct type air conditioner for exchanging heat between outside air and room air.

DESCRIPTION OF SYMBOLS 1 Heat exchange type ventilator 1a Main body 2 Outside air inlet 3 Indoor air outlet 4 Outside air inlet 5 Indoor air inlet 6 Supply air passage 7 Exhaust air passage 8 Supply fan 9 Exhaust fan 10 Electric motor 10a Rotating shaft DESCRIPTION OF SYMBOLS 11 Heat exchange element part 12 Air path shielding part 13 Indoor humidity sensor (indoor humidity measurement part)
14 Shielding portion 15 Opening portion 16 Holding portion 17 Gear 18 Shielding portion electric motor 19 Motor holding cover 20 Cover 21 Heater (heating portion)
21a Passing surface 22 Outdoor temperature sensor (outdoor temperature measuring unit)
23 Heater holding unit 24 Outdoor air 25 Indoor air 26 Outdoor 27 Indoor 28 Control unit

Claims

A supply air blowing path through which outside air is blown into the room from outside by a supply fan;
An exhaust air blowing path through which indoor air is blown from the room to the outside by an exhaust fan;
A heat exchange element portion is disposed at a position where the supply air blowing path and the exhaust ventilation path intersect,
An air passage shielding portion provided with an opening on the upstream side of the heat exchange element portion of the air supply air passage;
An indoor humidity measuring unit for measuring the humidity in the room;
A control unit that switches between opening and closing the air passage shielding unit,
The control unit includes an exhaust operation mode that closes the opening when the value of the indoor humidity measurement unit exceeds a first predetermined value and reduces introduction of the outside air into the heat exchange element unit. Heat exchange type ventilator.
The said control part is provided with the element drying mode which only exhausts the said indoor air for a fixed time when the value of the said indoor humidity measurement part is less than the 2nd predetermined value in the said exhaust operation mode. 2. The heat exchange type ventilator according to 1.
3. The heat according to claim 2, wherein, in the element drying mode, after the predetermined time has elapsed, only the indoor air is exhausted until the value of the indoor humidity measurement unit falls below a third predetermined value. Exchangeable ventilator.
A heating unit having a passage surface smaller than a cross-sectional area of the air supply air passage between the outside air inlet of the air supply air passage and the heat exchange element portion,
An outdoor temperature measuring unit for measuring the outdoor temperature, and
2. The heat exchange type ventilator according to claim 1, wherein when the value of the outdoor temperature measurement unit falls below a fourth predetermined value, the control unit starts the operation of the heating unit.
The heat exchanging ventilator according to claim 4, wherein a PTC heater is used for the heating unit.
The heat exchange type ventilation apparatus according to claim 1, wherein the air supply fan and the exhaust fan are attached to a rotating shaft of one electric motor.