JP2012172958A - Heat exchange type ventilator - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heat exchange type ventilator that prevents drain water aggregated and condensed inside a ventilator from outflowing with a simplified structure.SOLUTION: The the heat exchange type ventilator 15 includes, in a case 1, air supply passages 13a, 13 and 13b for communicating the outside of a building with the inside thereof through an outdoor suction port 9 and an indoor outlet 10, exhaust passages 14a, 14 and 14b for communicating the inside of a room with the outside thereof through an indoor suction port 11 and an outdoor outlet 12, an air supply blower 3 for forwarding an exhaust stream to the indoor outlet 10 from the outdoor suction port 9 through the air supply passages 13a, 13 and 13b, an exhaust blower 5 for forwarding an exhaust stream to the outdoor outlet 12 from the indoor suction port 11 through the exhaust passages 14a, 14 and 14b, and a heat exchanging element 6 for exchanging heat between an air supply stream flowing in the air supply passage 13 and an exhaust stream flowing in the exhaust passage 14. A water holding member for storing drain water is arranged in a location for forming the air supply passage 13a on a bottom surface inside the case 1, the location being in the vicinity of the heat exchanging element 6.

Description

  The present invention relates to a heat exchange that exchanges heat between an air supply passage that connects the outside and the room, an exhaust passage that connects the room and the outside, a supply airflow that flows through the supply passage, and an exhaust flow that flows through the exhaust passage. The present invention relates to a heat exchange type ventilator including an element.

  Conventionally, this type of heat exchange type ventilator has a problem that drain water condensed and condensed inside the apparatus flows out of the apparatus by taking in outside air in which fog is generated. In order to remove water droplets contained in the outside air, for example, a method is adopted in which the internal air passage of an outdoor hood that takes in the outside air is folded in a complicated manner and moisture is removed by collision of air in the air passage.

  There is also a method of reducing fog intrusion by detecting the state of air sucked from the outside with a sensor and controlling the operation of the air supply blower of the heat exchange type ventilator. For example, Patent Document 1 proposes a technique in which an air supply state detector (condensation sensor) for detecting the state of air intake taken from an outdoor suction port is provided in the air supply passage. In response to the fact that the dew condensation sensor has detected the intrusion of fog, the supply air blower is stopped or intermittently operated to prevent the intrusion of fog into the apparatus.

JP 2009-293880 A

  The intrusion of fog in the heat exchange ventilator may cause problems such as condensation of condensation inside the device and drainage of drain water generated by condensation, especially in the case of a ceiling-embedded type, where the drain water further wets the ceiling. Become. As a countermeasure, conventionally, a method of removing mist by a method of dropping mist with an outdoor deep hood member has been adopted. However, since this method is a mechanism for removing mist by a collision caused by an abrupt bending of an air passage, there is a problem in that pressure loss at an outdoor deep hood member increases.

  Moreover, when it turns out that generation | occurrence | production of fog is large after installing a heat exchange type | mold ventilation apparatus, an outdoor hood will be replaced | exchanged for the said outdoor deep type hood member. However, for example, outdoor hood replacement may be virtually impossible due to, for example, heat exchange ventilators installed on the third floor or higher of the building.

  In the technique of Patent Document 1, the exhaust blower is always operated for ventilation while the supply blower is stopped or intermittently operated according to the detection result of the dew condensation sensor. As the exhaust air volume continues to be greater than the air supply air volume, the room has a negative pressure. When the room has a negative pressure, a small amount of air flows into the heat exchange type ventilator through a duct that leads from the outside of the building to the indoor suction port. For this reason, it becomes difficult to completely suppress the invasion of fog into the heat exchange type ventilator.

  In addition, in order to suppress the intrusion of fog through the duct, it is possible to take measures to provide an electric damper that opens and closes the inside of the duct. In this case, a mechanism for stopping or intermittently operating the air supply blower and controlling the opening and closing of the electric damper is required in response to the detection of the fog intrusion by the dew condensation sensor. For this reason, complication of the control method, increase in installation cost, and the like become problems.

  The present invention has been made in view of the above, and an object of the present invention is to obtain a heat exchange type ventilator capable of suppressing outflow of drained water condensed and condensed inside the apparatus to the outside of the apparatus with a simple configuration. And

  In order to solve the above-described problems and achieve the object, the present invention provides an air intake passage that connects the outside of a building and a room through an outdoor air inlet and an indoor outlet, and the room and the outside are connected to the room. An exhaust passage connected through the opening and the outdoor air outlet, an air supply fan that advances an air flow from the outdoor air inlet to the indoor air outlet in the air supply passage, and the outdoor air blow from the indoor air inlet in the exhaust passage A heat exchange provided inside a housing with an exhaust blower that advances an exhaust flow to the outlet, and a heat exchange element that exchanges heat between the supply airflow that flows through the supply passage and the exhaust flow that flows through the exhaust passage In the type ventilator, a water holding member that holds drain water is disposed in the vicinity of the heat exchange element in the vicinity of the heat exchange element, in the bottom surface portion of the inside of the housing. And

  According to this invention, the water holding member holds the drain water generated by the aggregation and condensation of the mist that has entered the heat exchange type ventilator inside the heat exchange type ventilator. The heat exchange type ventilator can suppress the drain water condensed and condensed inside to the outside. Thereby, the heat exchanging ventilator can avoid problems such as drain water generated inside the apparatus due to the intrusion of mist droops into the ceiling or the room. In addition, after the generation of fog is confirmed in the usage environment of the heat exchange type ventilator, complicated work such as installation of an electric damper in post-installation becomes unnecessary.

FIG. 1 is a schematic diagram showing an embodiment of a heat exchange type ventilator according to the present invention. FIG. 2 is a detailed perspective view of the heat exchange type ventilator according to the present invention. FIG. 3 is a schematic view showing a construction state of the heat exchange type ventilator. FIG. 4 is a schematic view showing a construction state of the heat exchange type ventilator. FIG. 5 is a diagram showing a first embodiment of a heat exchange type ventilator according to the present invention. FIG. 6 is a diagram showing a second embodiment of the heat exchange type ventilator according to the present invention. FIG. 7 is a diagram showing a third embodiment of the heat exchange type ventilator according to the present invention. FIG. 8 is a diagram showing a fourth embodiment of the heat exchange type ventilator according to the present invention. FIG. 9 is a diagram showing a fifth embodiment of the heat exchange type ventilator according to the present invention.

  Embodiments of a heat exchange type ventilator according to the present invention will be described below in detail with reference to the drawings. Note that the present invention is not limited to the embodiments.

Embodiment 1 FIG.
FIG. 1 is a schematic diagram showing an embodiment of a heat exchange type ventilator according to the present invention. FIG. 2 is a detailed perspective view of the heat exchange type ventilator according to the present invention. The heat exchange type ventilation device 15 includes a rectangular parallelepiped housing 1 made of sheet metal. An air supply passage 13 for supplying outdoor air into the room and an exhaust passage 14 for exhausting indoor air to the outside are formed in the housing 1.

  The air supply passages 13 a, 13, and 13 b connect the outside of the building and the room through the outdoor suction port 9 and the indoor outlet 10. The outdoor inlet 9 and the indoor outlet 10 are each formed on the side surface of the housing 1. The air supply passage 13 a is a passage for supplying airflow from the outdoor suction port 9 to the heat exchange element 6. The supply air passage 13 is a supply air flow passage inside the heat exchange element 6. The air supply passage 13b is a passage of air supply from the heat exchange element 6 to the indoor outlet 10.

  The exhaust passages 14 a, 14, and 14 b connect the room and the outside through the indoor suction port 11 and the outdoor air outlet 12. The indoor suction port 11 and the outdoor air outlet 12 are each formed on the side surface of the housing 1. The exhaust passage 14 a is an exhaust flow passage from the indoor suction port 11 to the heat exchange element 6. The exhaust passage 14 is an exhaust flow passage inside the heat exchange element 6. The exhaust passage 14 b is an exhaust flow passage from the heat exchange element 6 to the outdoor outlet 12.

  The supply air blower 3 is stored in the supply air passage 13b. The air supply blower 3 advances the air supply air flow from the outdoor suction port 9 to the indoor air outlet 10 in the air supply passages 13a, 13 and 13b. The exhaust blower 5 is stored in the exhaust passage 14b. The exhaust blower 5 advances the exhaust flow from the indoor suction port 11 to the outdoor blowout port 12 through the exhaust passages 14a, 14 and 14b. The exhaust blower 5 is covered with a blower casing 31.

  The heat exchange element 6 is stored in a portion where the air supply passage 13 and the exhaust passage 14 intersect. The heat exchange element 6 performs heat exchange between the supply airflow flowing through the supply passage 13 and the exhaust flow flowing through the exhaust passage 14. The heat exchange element 6 includes an air supply passage 13 having a multilayer structure made of corrugated paper (corrugated sheet) bonded on a flat paper, and an exhaust passage 14 having a multilayer structure made of corrugated paper (corrugated sheet) bonded on the flat paper. Is provided. In the heat exchange element 6, the traveling direction of the supply airflow in the supply passage 13 and the traveling direction of the exhaust flow in the exhaust passage 14 are orthogonal to each other.

  The air supply side air filter 29 is detachably installed on the surface of the heat exchange element 6 into which the air supply air flows. The exhaust side air filter 30 is detachably installed on the surface of the heat exchange element 6 where the exhaust flow flows. The air supply side air filter 29 and the exhaust side air filter 30 are provided for the purpose of preventing clogging of the heat exchange element 6 due to dust or the like mixed in the outside air and room air. The maintenance port 28 is provided in the vicinity of the heat exchange element 6 in the front portion of the housing 1.

  The direct expansion coil 7 is stored in the air supply passage 13b. The direct expansion coil 7 heats and cools the air supply airflow. The humidifier 8 is stored downstream of the direct expansion coil 7 in the air supply passage 13b. The humidifier 8 humidifies the supplied airflow. In the figure, reference numeral OA indicates the outside air, reference numeral SA indicates the supply air, reference numeral RA indicates the return air, and reference numeral EA indicates the exhaust air.

  The outside air OA flows from the outside to the air supply passage 13a at the outdoor suction port 9. The air supply air flowing into the air supply passage 13 a reaches the indoor outlet 10 through the heat exchange element 6, the direct expansion coil 7 and the humidifier 8. The air supply air reaching the indoor outlet 10 is blown into the room as the air supply SA.

  The return air RA flows into the exhaust passage 14a from the room at the indoor suction port 11. The exhaust flow flowing into the exhaust passage 14 a passes through the heat exchange element 6 and reaches the outdoor outlet 12. The exhaust stream that has reached the outdoor outlet 12 is blown out to the outside as exhaust EA.

  3 and 4 are schematic views showing a construction state of the heat exchange type ventilator. FIG. 3 is a front view of the heat exchange type ventilator 15 in the direction of arrow A shown in FIG. FIG. 4 is a side view of the heat exchange type ventilator 15 in the direction of arrow C shown in FIG.

  The humidifier drain pan 17 is disposed under the direct expansion coil 7 and the humidifier 8. The humidifier drain pan 17 receives water discharged from the humidifier 8 and condensed water generated in the direct expansion coil 7 during cooling. A drain pipe 16 connected to the humidifier drain pan 17 discharges drain water 18 accumulated in the humidifier drain pan 17.

  The heat exchange type ventilator 15 is installed, for example, suspended from the ceiling by suspension bolts 19. As shown in FIG. 4, the heat exchange type ventilator 15 may be installed by tilting the entire housing 1 so that the side on which the drain pipe 16 is provided is inclined downward. By providing such a gradient, the heat exchange type ventilation device 15 can reliably drain the drain water 18 from the drain pipe 16. The heat exchanging ventilator 15 may be configured such that the bottom surface of the housing 1 is installed horizontally without having a gradient. The heat exchange type ventilator 15 may be provided with an appropriate gradient or installed horizontally, and is not limited to the case where the heat exchange type ventilator 15 is installed suspended from the ceiling by the suspension bolts 19.

  FIG. 5 is a diagram showing a first embodiment of a heat exchange type ventilator according to the present invention. FIG. 5 is a schematic front view of the heat exchange element 6 and its peripheral portion in the heat exchange type ventilator 15 shown in FIG. The air supply side air filter 29 and the exhaust side air filter 30 are held by filter holding rails 24 a and 24 b attached to the heat exchange element 6. The heat exchange element 6 is fixed to the housing 1 by spot welding or screwing through a fixed rail 20.

  In the first embodiment, the drain pan 25 is installed below the air supply side air filter 29 in the bottom surface portion of the housing 1. The drain pan 25 is a portion constituting the air supply passage 13 a in the bottom surface inside the housing 1 and is disposed in the vicinity of the heat exchange element 6. In addition, let a bottom face part be a part which becomes a vertically lower side when the heat exchange type | formula ventilation apparatus 15 is installed in the housing | casing 1. FIG.

  When the supply airflow mixed with mist flows into the heat exchange element 6, the water is condensed and condensed by the supply-side air filter 29 to become drain water 26. The drain pan 25 functions as a water holding member that stores and holds the drain water 26.

  The width dimension D of the drain pan 25 is set so as to be wider than at least the range of the air supply side air filter 29 that is not covered with the filter holding rails 24 a and 24 b and projected onto the bottom surface of the housing 1. Yes. By causing the drain pan 25 to have a width dimension D required to receive the drain water 26 dripping from the air supply side air filter 29, it is possible to suppress the drain water 26 from flowing out from the bottom surface of the housing 1 to the outside of the apparatus. Is possible. Further, it is desirable that the drain pan 25 has a size that can be taken out from the maintenance port 28. Thereby, the drain water 26 collected in the drain pan 25 can be easily taken out together with the drain pan 25.

  By providing the drain pan 25, the heat exchange type ventilation device 15 can suppress the outflow of the drain water 26 condensed and condensed inside the housing 1. Thereby, the heat exchange type ventilation apparatus 15 can avoid problems such as the drain water 26 generated inside the apparatus due to the intrusion of mist droops into the ceiling or the room. Moreover, even after the generation of mist is confirmed in the usage environment of the heat exchange type ventilator 15, the outflow of the drain water 26 can be suppressed by a simple operation of installing the drain pan 25 through the maintenance port 28.

Embodiment 2. FIG.
FIG. 6 is a diagram showing a second embodiment of the heat exchange type ventilator according to the present invention. FIG. 6 is a schematic front view of the heat exchange element 6 and its peripheral portion in the heat exchange type ventilator 15 shown in FIG. The description overlapping with that in Embodiment 1 is omitted as appropriate.

  In the second embodiment, the concave portion provided integrally with the bottom surface portion of the housing 1 is used as the drain receiving portion 27 that functions as a water holding member. The width dimension D of the drain receiving portion 27 is set so as to be wider than at least a region of the air supply side air filter 29 that is not covered by the filter holding rails 24 a and 24 b and projected onto the bottom surface portion of the housing 1. Has been. By providing the drain receiving portion 27 with the width D necessary for receiving the drain water 26 dripping from the air supply side air filter 29, the drain water 26 is prevented from flowing out of the apparatus from the bottom surface of the housing 1. It becomes possible to make it.

  In the second embodiment, similarly to the first embodiment, it is possible to avoid problems due to the drainage of the drain water 26. Furthermore, the heat exchange type ventilator 15 allows a part of the housing 1 to function as the drain receiving portion 27, so that the drain water 26 can be retained with good workability and low cost without adding any components. . Further, the air path pressure loss can be suppressed as compared with the case where components are arranged in the air supply passage 13a.

Embodiment 3 FIG.
FIG. 7 is a diagram showing a third embodiment of the heat exchange type ventilator according to the present invention. FIG. 7 is a schematic top view in the arrow B direction of the heat exchange type ventilator 15 shown in FIG. The description overlapping with that in Embodiment 1 is omitted as appropriate.

  In the third embodiment, a water retention sponge 21 that functions as a water retention member is disposed on the bottom surface of the housing 1. The width dimension D of the water retaining sponge 21 is set to be wider than at least the range of the air supply side air filter 29 that is not covered with the filter holding rails 24 a and 24 b and projected onto the bottom surface of the housing 1. ing. In the direction perpendicular to the width dimension D in the figure, the water retaining sponge 21 has substantially the same length as the fixed rail 20. The water retaining sponge 21 is provided in an area located below the air supply side air filter 29 in the bottom surface portion of the housing 1.

  In the third embodiment, similarly to the first and second embodiments, problems due to the outflow of the drain water 26 can be avoided. The water retaining member for water retention is not limited to a sponge and may be any material that has a water absorbing property.

Embodiment 4 FIG.
FIG. 8 is a diagram showing a fourth embodiment of the heat exchange type ventilator according to the present invention. FIG. 8 is a schematic top view in the arrow B direction of the heat exchange ventilator 15 shown in FIG. 2 with the heat exchange element 6 removed. The description overlapping with that in Embodiment 1 is omitted as appropriate.

  As shown in FIG. 4, the heat exchange type ventilator 15 is installed with a gradient so that the side on which the drain pipe 16 is provided is obliquely downward. In the fourth embodiment, a packing 22 that is a water holding member is provided on the bottom surface of the housing 1. The packing 22 is disposed at a position on the lower side of the gradient in the region located under the air supply side air filter 29.

  In the illustrated example, the packing 22 is provided so as to crawl along the maintenance port 28 from the fixed rail 20. Of the packing 22, the portion along the maintenance port 28 and the portion along the fixed rail 20 are bent at substantially right angles. The packing 22 has a portion along the maintenance port 28 and the side opposite to the fixed rail 20 side is also bent at a substantially right angle and is stretched to some extent in a direction substantially parallel to the fixed rail 20.

  The packing 22 is affixed so as to reliably fill a gap between the bottom surface portion of the housing 1 and components such as the fixed rail 20 arranged on the bottom surface portion. By installing the heat exchange type ventilator 15 with a gradient, the drain water 26 dripped under the air supply side air filter 29 in the casing 1 moves downward in the gradient. The packing 22 suppresses the drain water 26 from flowing out of the maintenance port 28 to the outside and the movement of the drain water 26 to the whole of the bottom surface of the housing 1 beyond the fixed rail 20.

  The packing 22 functions as a weir that suppresses the outflow of the drain water 26 from the maintenance port 28 and the diffusion of the drain water 26 in the bottom surface of the housing 1. In the fourth embodiment, similarly to the first to third embodiments, it is possible to avoid problems due to the drainage of the drain water 26. The position where the packing 22 is disposed is not limited to the position described in the present embodiment, and may be changed as appropriate. The packing 22 only needs to be disposed at least at a part of the outer edge of the region located below the air supply side air filter 29.

Embodiment 5 FIG.
FIG. 9 is a diagram showing a fifth embodiment of the heat exchange type ventilator according to the present invention. FIG. 9 is a schematic top view in the arrow B direction of the heat exchange type ventilator 15 shown in FIG. 2 with the heat exchange element 6 removed. The description overlapping with that in Embodiment 1 is omitted as appropriate.

  The heat exchange type ventilator 15 is installed such that the bottom surface of the housing 1 is horizontal. In the fifth embodiment, a packing 23 that is a water holding member is provided on the bottom surface of the housing 1. The packing 23 is disposed so as to surround a region located under the air supply side air filter 29. The packing 23 is affixed so as to reliably fill a gap between the bottom surface portion of the housing 1 and components such as the fixed rail 20 and the blower casing 31 disposed on the bottom surface portion.

  The packing 23 functions as a weir that suppresses the outflow of the drain water 26 from the maintenance port 28 and the diffusion of the drain water 26 in the bottom surface of the housing 1. In the fifth embodiment, similarly to the first to fourth embodiments, problems due to the drainage of the drain water 26 can be avoided.

DESCRIPTION OF SYMBOLS 1 Housing | casing 3 Supply air blower 5 Exhaust air blower 6 Heat exchange element 7 Direct expansion coil 8 Humidifier 9 Outdoor air inlet 10 Indoor air outlet 11 Indoor air inlet 12 Outdoor air outlet 13, 13a, 13b Air supply path 14, 14a, 14b Exhaust passage 15 Heat exchange type ventilator 16 Drain piping 17 Humidifier drain pan 19 Suspension bolt 20 Fixed rail 21 Water retaining sponge 22, 23 Packing 24a, 24b Filter holding rail 25 Drain pan 27 Drain receiving portion 28 Maintenance port 29 Air supply side air filter 30 Exhaust air filter 31 Blower casing

Claims (6)

An air supply passage connecting the outside of the building and the room through an outdoor air inlet and an indoor outlet;
An exhaust passage connecting the room and the outside through an indoor inlet and an outdoor outlet;
An air supply blower that advances an air supply flow from the outdoor suction port to the indoor air outlet in the air supply passage;
An exhaust blower that advances an exhaust flow from the indoor suction port to the outdoor air outlet in the exhaust passage;
In a heat exchange type ventilator provided inside a housing, a heat exchange element that performs heat exchange between the supply airflow flowing through the supply passage and the exhaust flow flowing through the exhaust passage,
A heat exchange type characterized in that a water holding member for holding drain water is disposed in the vicinity of the heat exchange element in the vicinity of the heat exchange element in the bottom surface portion in the inside of the housing. Ventilation device.   The heat exchange ventilator according to claim 1, wherein the water holding member is a drain pan that stores the drain water.   The heat exchange ventilator according to claim 1, wherein the water holding member is a recess provided integrally with the bottom surface portion.   The heat exchange type ventilation apparatus according to claim 1, wherein the water holding member is formed of a water holding sponge having water holding capacity. The water retaining member is a packing provided on the bottom surface,
The heat exchange ventilator according to claim 1, wherein the packing is disposed so as to surround a region of the heat exchange element located below a surface into which the air supply air flows. The water retaining member is a packing provided on the bottom surface,
2. The heat exchange mold according to claim 1, wherein the packing is disposed on at least a part of an outer edge of a region located below a surface into which the air supply air flows in the heat exchange element. Ventilation device.

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