JP5511560B2 - Heat exchange ventilator - Google Patents

Description

  The present invention relates to a heat exchange ventilator capable of performing ventilation by supply / exhaust while exchanging heat between supply / exhaust flows through a built-in heat exchanger.

  The heat exchange ventilator incorporates a heat exchanger that performs air-to-air heat exchange, and performs ventilation by simultaneous supply and exhaust while performing heat exchange. For example, Patent Document 1 discloses a heat exchange ventilator that is partly exposed on the ceiling and has a supply air blower and an exhaust blower arranged with a heat exchanger interposed therebetween.

  In this heat exchange ventilator, the air supply after heat exchange is blown directly into the room from the panel connected to the lower surface of the product. Conventionally, since this type of heat exchanger device has a panel with an indoor outlet and an indoor suction port, no duct piping on the indoor side is required, and an air supply air passage from outside air to air supply, And the basic air passage configuration of the exhaust air passage from the return air to the exhaust is the same. For this reason, the pressure loss in both air passages is substantially the same, and even when an air supply blower and an exhaust blower having substantially the same motor power and QH are used, it is difficult for the supply air and the exhaust air to be biased.

  Apart from the exposed heat exchange ventilator that exposes the panel to the room in this way, for example, Patent Document 2 discloses a ceiling-embedded heat exchange ventilator that completely embeds the heat exchange ventilator in the back of the ceiling. ing.

  Since the embedded heat exchange ventilator is installed by being completely embedded in the back of the ceiling, it is difficult to secure a space for maintenance of the heat exchange ventilator on the upper and lower surfaces of the product. Therefore, it is configured so that maintenance can be performed from the side of the product. When a sirocco fan is used as a blower, a scroll casing of the blower is formed integrally with the air passage on the main body side, and a motor with blades is attached thereto, so that the blower and the air passage are completed.

  Further, the rotating shaft of the blade member of the blower, that is, the rotating shaft of the motor is provided so as to be horizontal with respect to the bottom surface of the casing so that the blower can be easily attached and detached from the maintenance port on the side surface of the product during maintenance. As a result, the blade member can be easily inserted into and removed from the scroll casing, and only the blower ASSY (a state in which the blade and the motor are integrated) can be removed in the horizontal direction without removing the scroll casing. Sufficient maintenance is possible even in space.

  In addition, in the embedded heat exchange ventilator, duct piping is also required on the indoor side, but design restrictions are reduced because the heat exchange ventilator itself is not exposed from the ceiling. By reducing the design restrictions, it becomes easy to increase the external dimensions other than the height dimension of the heat exchange ventilator, and a humidification function may be added by incorporating a humidifier inside the heat exchange ventilator.

JP-A-11-248216 JP-A-9-133386

  However, by providing a humidifier unit in the air supply path in order to add a humidification function, the pressure loss in the air supply path becomes larger than that in the exhaust path. Therefore, in order to increase the output of the air supply blower, it has been necessary to increase the motor size or increase the size of the blade member. However, as described above, since the rotation axis of the blade is provided so as to be parallel to the bottom surface from the viewpoint of maintainability, the height of the heat exchange ventilator is increased by increasing the size of the blade member. turn into.

  As the height dimension of the heat exchange ventilator is increased, there is a problem that the workability is lowered, for example, the heat exchanging ventilator cannot be installed in an environment where the height of the back of the ceiling is not sufficient. On the other hand, if priority is given to the height of the heat exchange ventilator, the blade member of the air supply blower must be made small, and there is a problem that it is difficult to ensure a sufficient amount of air supply.

  This invention is made in view of the above, Comprising: While obtaining humidification etc. to a supply airflow, obtaining the heat exchange ventilator which can be compatible with ensuring of supply air volume and suppression of a height dimension. Objective.

  In order to solve the above-described problems and achieve the object, the present invention includes an air supply path that connects the outdoor suction port and the indoor air outlet, and an exhaust path that connects the indoor air intake and the outdoor air outlet. A casing formed inside, an air supply blower that is provided in the air supply path and generates a supply air flow from the outdoor side intake port toward the indoor side outlet, and an exhaust path that is provided in the exhaust side and is provided outside the outdoor side from the indoor side intake port. An exhaust blower that generates an exhaust flow toward the outlet, a heat exchanger that is disposed inside the casing and performs heat exchange between the supply air flow and the exhaust flow, and downstream of the heat exchanger in the supply passage And an air conditioner that adjusts at least one of the temperature and humidity of the supply airflow, and the supply air blower is configured such that the rotating shaft of the blade member of the supply air blower is substantially perpendicular to the bottom surface of the casing. It is provided in.

  According to the present invention, there is an effect that it is possible to achieve both the securing of the amount of supplied air and the suppression of the height dimension while performing humidification to the supplied air flow.

FIG. 1 is a diagram showing an outline of a planar configuration of a heat exchange ventilator according to an embodiment of the present invention. FIG. 2 is a diagram showing an outline of a side configuration of the heat exchange ventilator. FIG. 3 is an external perspective view of the air supply blower unit. FIG. 4 is a plan view of the air supply blower unit viewed from the bell mouth portion side. FIG. 5 is a side view of the air supply blower unit. FIG. 6 is an external perspective view of the air supply blower unit, and shows a state supported by the guide receiving part and the guide side part. FIG. 7 is a side view of the air supply blower unit and is a view showing a state supported by the guide receiving portion and the guide side portion. FIG. 8 is a diagram illustrating an outline of a planar configuration of the heat exchange ventilator, and is a diagram illustrating a state in which the air supply blower unit is moved to the maintenance work space. FIG. 9 is a diagram showing a schematic configuration of the exhaust blower unit.

  Embodiments of a heat exchange 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 diagram showing an outline of a planar configuration of a heat exchange ventilation apparatus according to Embodiment 1 of the present invention. FIG. 2 is a diagram showing an outline of a side configuration of the heat exchange ventilator. The heat exchange ventilator 60 includes a casing 1, a heat exchanger 3, an air supply blower unit (supply air blower) 30, an exhaust air blower unit (exhaust air blower) 40, an air conditioning coil 7, and a humidifier 8.

  The casing 1 constitutes a box of the heat exchange ventilation device 60. The casing 1 has a pair of openings on the outdoor side and the indoor side, and the openings function as an outdoor suction port 11, an outdoor blowout port 13, an indoor blowout port 12, and an indoor suction port 10, respectively. To do. In the casing 1, the outdoor air inlet 11 and the indoor air outlet 12 are communicated to supply the outdoor air into the room, and the indoor air inlet 10 and the outdoor air outlet 13 are communicated. And an exhaust passage 16 for exhausting indoor air to the outside.

  The air supply path 17 and the exhaust path 16 are provided independently over the entire path, and the heat exchanger 3 is provided between the air supply path 17 and the exhaust path 16. The heat exchanger 3 exchanges heat between the supply airflow passing through the supply passage 17 and the exhaust flow passing through the exhaust passage 16.

  An air supply blower unit 30 is provided in the air supply path 17. In addition, an air supply passage portion 20 including an air conditioning coil (air conditioner) 7 and a humidifier (air conditioner) 8 constitutes a part of the air supply passage 17. The air supply air passing through the air supply passage 17 flows into the casing 1 from the outdoor air inlet 11, passes through the air supply passage 19 of the heat exchanger 3, passes through the air supply blower unit 30, and the air conditioning coil 7 and It passes through the air supply air passage section 20 provided with the humidifier 8 and is blown out from the indoor side outlet 12 to the indoor side.

  An exhaust fan unit 40 is provided in the exhaust passage 16. The exhaust flow passing through the exhaust passage 16 flows into the casing 1 from the indoor suction port 10, passes through the exhaust passage 18 of the heat exchanger 3, passes through the exhaust blower unit 40, and passes through the outdoor air outlet 13. Discharged to the outside.

  The exhaust passage 16 is provided with a bypass air passage 6 for discharging the exhaust flow to the outdoor side without passing through the exhaust passage 18 of the heat exchanger 3. In addition, the open / close damper 4 is provided to switch the exhaust passage 16 between an air passage including the exhaust passage 18 of the heat exchanger 3 and a bypass air passage 6 not including the exhaust passage 18.

  The heat exchanger 3 can be inserted and removed in the horizontal direction from the maintenance cover 15 portion of the casing 1. Two heat exchangers 3 are incorporated in series, and the exhaust passage 18 and the air supply passage 19 cross each other at an angle. The bypass air passage 6 is configured between the back side surface of the heat exchanger 3 incorporated on the back side and the inner surface of the casing 1 when viewed from the maintenance cover 15 direction.

  FIG. 3 is an external perspective view of the air supply blower unit 30. FIG. 4 is a plan view of the air supply blower unit 30 as viewed from the bell mouth portion side. FIG. 5 is a side view of the air supply blower unit 30. The air supply fan unit 30 includes a scroll casing 31, an air supply fan blade (blade member) 32, an air supply fan fixing unit 33, a scroll casing fixing unit 34, and an air supply fan motor 35.

  The scroll casing 31 is an integrally formed product including a suction-type bell mouth portion 31a including an air supply fan blade 32 and having an outlet portion 31b continuous in the blowing direction. The air sucked from the bell mouth portion 31 a is blown out from the outlet portion 31 b of the scroll casing 31 by the supply air blower blade 32. The outlet portion 31 b is connected to the inlet of the supply air passage portion 20. The air blown out from the outlet portion 31b is blown out indoors from the indoor outlet 12. The outlet 31b is located on the opposite side of the heat exchanger 3, and is provided so that air is blown out substantially in parallel with the sliding direction of the air supply blower unit 30 (detailed later).

  The supply air blower blade 32 is composed of a sirocco fan. The supply air blower blade 32 is rotated by the supply air blower motor 35. The blade rotation shaft of the supply air blower motor 35, that is, the rotation shaft of the supply air blower blade 32 is provided substantially perpendicular to the bottom surface of the casing 1.

  The scroll casing 31 is placed on the air supply fan fixing part 33. The scroll casing 31 and the air supply fan fixing part 33 are fixed by the scroll casing fixing part 34 and are in a close contact state. Therefore, the leakage of the airflow from between the scroll casing 31 and the air supply fan fixing part 33 can be suppressed, and most of the air sucked from the bell mouth part 31a can be blown out from the outlet part 31b.

  FIG. 6 is an external perspective view of the air supply blower unit 30 and shows a state supported by the guide receiving portion 36 and the guide side portion 37. FIG. 7 is a side view of the air supply blower unit 30 and shows a state supported by the guide receiving portion 36 and the guide side portion 37.

  In the casing 1, the supply air blower unit 30 is supported by the supply air blower fixing portion 33 being supported by the guide receiving portion 36 and the guide side portion 37. The guide receiving part 36 supports the supply air blower fixing part 33 from the lower side. The guide receiving portion 36 is configured by providing two rows of rod-shaped members having a U-shaped bent cross-sectional shape.

  The guide receiving portion 36 is a side of the side constituting the outer periphery of the air supply blower fixing unit 33, the extension line of which extends toward the heat exchanger 3, in this embodiment, the exhaust passage 18 of the heat exchanger 3 or the air supply. The side that is substantially perpendicular to the flow direction of the supply airflow or exhaust flow in the passage 19 is supported. The supply air blower fixing portion 33 is not fixed to the guide receiving portion 36, and the supply air blower unit 30 can slide on the supply air blower fixing portion 33.

  The guide receiving part 36 is fixed to the guide side part 37. The guide side portion 37 is provided on the side of the guide receiving portion 36 and is fixed to the top surface and the bottom surface of the casing 1. In the present embodiment, two guide side portions 37 are fixed to one guide receiving portion 36. The two guide side portions 37 are provided such that the distance between the guide side portions 37 is narrower than the width of the scroll casing 31.

  Thereby, the sliding movement of the supply air blower unit 30 in a direction other than the direction along the guide receiving portion 36 (the direction indicated by the arrow X), that is, the direction toward the heat exchanger 3 is restricted. The guide side portion 37 also has a U-shaped cross section like the guide receiving portion 36, and is less likely to be deformed by its own weight of the air supply blower unit 30.

  FIG. 8 is a diagram illustrating an outline of a planar configuration of the heat exchange ventilation device 60, and is a diagram illustrating a state in which the air supply blower unit 30 is moved to the maintenance work space. Maintenance of the air supply blower unit 30 is performed from the maintenance port 45 opened on the side surface of the casing 1. More specifically, first, the maintenance cover 15 that closes the maintenance port 45 is opened, and the heat exchanger is extracted from the maintenance port 45. And the space where the heat exchanger 3 was arrange | positioned is used as a maintenance work space.

  An air supply fan blade 32, an air supply fan motor 35, a scroll casing 31, and a scroll casing fixing part 34 constituting the air supply fan unit 30 are fixed on the air supply fan fixing part 33. Therefore, only the air supply blower fixing portion 33 is slid along the guide receiving portion 36 in the direction substantially opposite to the outlet portion 31b of the scroll casing 31 (that is, the direction of the maintenance work space in which the heat exchanger 3 is disposed). By doing so, the entire air supply blower unit 30 can be moved to the maintenance work space. Then, by moving the air supply blower unit 30 that has moved to the maintenance work space along the direction indicated by the arrow Y, the air supply blower unit is pulled out of the casing 1 from the maintenance port 45 and repaired and inspected. Can do.

  As described above, the width dimension of the guide side portions 37 arranged in the sliding direction of the air supply blower unit 30 is narrower than the width dimension of the air supply blower fixing portion 33. Moreover, the width dimension of the guide side parts 37 provided in the position which opposes on both sides of the air supply fan unit 30 is substantially equal to the width dimension of the air supply fan fixing | fixed part 33. FIG. Therefore, the air supply blower unit 30 is regulated by the guide side portion 37 from sliding in a direction other than the direction toward the region where the heat exchanger 3 is disposed.

  FIG. 9 is a diagram illustrating a schematic configuration of the exhaust blower unit 40. The exhaust blower unit 40 includes an exhaust air passage component 41, an exhaust blower blade 42, an exhaust blower fixing part 43, and an exhaust blower motor 44. The exhaust blower blade 42 is constituted by a sirocco fan.

  The exhaust air passage component 41 has a suction-type bell mouth portion 41 a including the exhaust blower blade 42 disposed in the center. The exhaust air passage component 41 is formed with a corolla casing as a blower, an outlet portion 41b continuous in the blowing direction is formed on one side thereof, and an outdoor suction portion 41c of the air supply passage 17 is formed on the other side. It is a single molded product. The air sucked from the bell mouth portion 41 a is blown out to the outlet portion 41 b by the exhaust blower blade 42 and blown out from the indoor side blower outlet 12 to the outdoor side as the exhaust passage 16.

  The exhaust passage 16 has a smaller pressure loss than the air supply passage 17 in which the air conditioning coil 7 and the humidifier 8 are provided in the passage. Therefore, even if the blade diameter is smaller than that of the air supply blower unit 30, the exhaust passage 16 is sufficient. Satisfies the external static pressure on the exhaust side. In other words, the outer size of the exhaust blower blade 42 may be smaller than that of the supply air blower blade 32.

  Therefore, the blade rotation shaft of the exhaust blower motor 44 is provided substantially horizontally with respect to the bottom surface of the casing 1. The exhaust airflow component 41 and the exhaust air blower fixing portion 43 have a close contact structure, and the exhaust flow sucked from the bell mouth portion 41a has a structure that is difficult to blow out (is difficult to leak) other than the outlet portion 41b of the exhaust airflow component 41. .

  Since the exhaust blower unit 40 is disposed substantially at the center of the exhaust air passage component 41, the exhaust blower unit 40 is in a range that can be relatively easily reached from the maintenance port 45 of the casing 1. In addition, a sirocco fan such as the exhaust blower blade 42 generally has a structure that can be easily inserted into and removed from the scroll casing in parallel with the rotation shaft, so that the exhaust blower motor 44 can be removed without removing the exhaust air passage component 41. And the exhaust blower blade 42 can be extracted from the maintenance port 45 while being integrated. Further, since the air passage and the scroll casing are integrated, the number of components is small and the number of joints is small, so that air leakage can be reduced and the cost can be reduced.

  As shown in FIGS. 1 and 2, the air supply air passage portion 20 is provided with a humidifier 8 as a humidifying means, and a drain pan 21 that receives drain generated in the humidifier 8 and drains it to the outside. The humidifier 8 is connected to a water supply source such as an external water supply facility, and is supplied with water for humidification. The humidifier 8 has a structure in which bags made of moisture permeable membranes are stacked and stacked. Water is supplied into each bag, and air is passed between the stacked bags and the bag. The water inside is evaporated through the moisture permeable membrane, thereby humidifying the supply air.

  Further, in order to increase the amount of humidification to the supply air, an air conditioning coil 7 is arranged upstream of the humidifier 8 and the amount of water evaporated from the humidifier 8 is increased by raising the temperature of the supply air by the air conditioning coil. Is increasing. Even when humidification is unnecessary in summer, the air conditioning coil functions as a cooling device and can cool the supplied air. In this manner, the air conditioning coil 7 and the humidifier 8 function as an air conditioner that adjusts the temperature and humidity of the air supply air passing through the air supply path 17.

  The drain pan 21 collects condensed water generated by the air conditioning coil 7 during cooling. Further, the drain tray 21 collects water leaked from the humidifier 8 when water leaks from the humidifier 8.

  With the above configuration, in the case of a heat exchange ventilator having a humidification function for the supply air, the pressure loss (supply air path) is greater than the exhaust path 16 by the amount of the air conditioning coil 7 and humidifier 8 provided in the supply path 17. + Air conditioning coil + humidifier). Therefore, the air supply blower unit 30 is required to have a higher QH performance than the exhaust blower unit 40. Therefore, compared to the exhaust blower unit 40, in the supply blower unit 30, it is necessary to increase the motor size of the supply blower motor 35 or increase the blade diameter of the supply blower blade 32.

  On the other hand, in the present embodiment, the supply air blower unit 30 is provided such that the rotation shaft of the supply air blower blade 32 is substantially perpendicular to the bottom surface of the casing 1. Even if it is a case, it is not necessary to enlarge the external height dimension of the heat exchange ventilation apparatus 60. FIG. Therefore, the QH performance of the air supply blower can be made higher than the QH performance of the exhaust blower without increasing the external height of the heat exchange ventilator.

  As a result, even in the heat exchange ventilator 60 having an additional function such as a humidifying function, a sufficient supply air volume can be generated and the height of the outer shape does not need to be increased. It becomes difficult to be affected by the space behind the ceiling of the building, and the workability can be improved.

  Even if the rotation shaft of the air supply fan blade 32 is provided substantially perpendicular to the bottom surface of the casing 1, the air supply fan unit 30 can slide entirely including the scroll casing. The removal of the unit 30 can be simplified.

  Further, the air supply blower unit 30 is slidable toward the heat exchanger 3. In the heat exchange ventilator 60, for maintenance of the heat exchanger 3, an opening (for example, a maintenance port 45) for taking out the heat exchanger 3 from the casing 1 is generally formed. That is, the space after the heat exchanger 3 is taken out can be used as a work space by moving the air supply blower unit 30 to the heat exchanger 3 side. Moreover, it becomes easy to take out the air supply blower unit 30 from the opening provided for taking out the heat exchanger 3.

  Therefore, since it is not necessary to provide a dedicated work space for maintaining the air supply blower unit 30, an increase in the size of the product can be suppressed. In addition, since the supply air blower unit 30 can be easily taken out, the maintainability can be improved.

  Further, since the outlet 31b of the air supply blower unit 30 has the air blowing direction substantially parallel to the slide direction of the air supply blower unit 30, the outlet 31b can be simply exited by simply sliding the air supply blower unit 30 and pushing it in. The portion 31b can be brought into close contact with the air supply air passage portion 20. Therefore, even in a narrow space such as the inside of the casing 1, the outlet portion 31 b and the supply air passage portion 20 can be easily and reliably adhered, and air leakage can be suppressed.

  In addition, by obtaining an air volume equivalent to the exhaust air volume without substantially reducing the air supply air volume as described above, the static air pressure (external static pressure) of the air supply air flow and the exhaust air flow at the indoor air outlet 12 and the indoor air inlet 10 is obtained. ) Is hardly reduced.

  Therefore, free ductwork from the indoor air outlet 12 and the indoor air inlet 10 is possible, and the heat exchange ventilator 60 itself is provided outside the room, for example, behind the ceiling of the hallway, instead of the ceiling inside the room. Even if it exists, supply air and exhaust air can be guided to the living room by the duct. By providing the heat exchange ventilator 60 outside the room, there is a risk that damage to water-sensitive equipment such as OA equipment in the room will occur even if water leakage occurs at the connection part 22 of the humidified water supply. It can be avoided.

  In addition, in this Embodiment, although the structure which provided both the air-conditioning coil 7 and the humidifier 8 in the air supply path 17 is employ | adopted, it is not restricted to this. For example, the structure provided with either the air-conditioning coil 7 or the humidifier 8 in the air supply path 17 may be sufficient.

  Even in this case, the pressure loss increases by the amount of the air-conditioning coil 7 or the humidifier 8 provided in the air supply path 17, so that the blade diameter of the air supply blower unit 30 may need to be increased. However, since the rotation shaft of the blades of the air supply blower unit 30 is provided substantially perpendicular to the bottom surface of the casing as in the present embodiment, the height of the heat exchange ventilator 60 is increased as described above. You do n’t have to.

  The air conditioner provided in the air supply path 17 is not limited to the air conditioning coil 7 or the humidifier 8. For example, an electric heater for heating the supply airflow may be used.

  As described above, the heat exchanging ventilator according to the present invention supplies a heat exchanging ventilator that performs ventilation while exchanging heat between a supply airflow and an exhaust airflow, particularly an air conditioning device such as an air conditioning coil or humidified air. Suitable for heat exchange ventilators for air passages.

DESCRIPTION OF SYMBOLS 1 Casing 3 Heat exchanger 4 Opening / closing damper 6 Bypass air path 7 Air conditioning coil (air conditioner)
8 Humidifier (air conditioner)
DESCRIPTION OF SYMBOLS 10 Indoor side inlet 11 Outdoor side inlet 12 Indoor side outlet 13 Outdoor side outlet 15 Maintenance cover 16 Exhaust path 17 Air supply path 18 Exhaust path 19 Supply path 20 Supply air path part 21 Drain plate 22 Connection part 30 Supply Air blower unit 31 Scroll casing 31a Bell mouth part 31b Outlet part 32 Supply air blower blade 33 Supply air blower fixing part 34 Scroll casing fixing part 35 Supply air blower motor 36 Guide receiving part (guide part)
37 Guide side (guide part)
40 Exhaust blower unit 41a Bell mouth part 41b Outlet part 41c Outdoor suction part 41 Exhaust air passage part 42 Exhaust blower blade 43 Exhaust blower fixing part 44 Exhaust blower motor 45 Maintenance port 60 Heat exchange ventilator X arrow Y arrow

Claims (4)

A casing in which an air supply path connecting the outdoor-side suction port and the indoor-side air outlet and an exhaust path connecting the indoor-side air inlet and the outdoor-side air outlet are formed,
An air supply blower that is provided in the air supply path and generates an air supply air flow from the outdoor air inlet to the indoor air outlet;
An exhaust blower that is provided in the exhaust passage and generates an exhaust flow from the indoor suction port toward the outdoor blowout port;
A heat exchanger disposed inside the casing for exchanging heat between the supply airflow and the exhaust stream;
An air conditioner provided on the downstream side of the heat exchanger in the air supply path to adjust at least one of temperature and humidity of the air supply air,
The supply air blower is provided such that a rotation shaft of a blade member included in the supply air blower is substantially perpendicular to a bottom surface of the casing ,
The exhaust blower is provided so that the rotation axis of the blade member of the exhaust blower is substantially parallel to the bottom surface of the casing,
The diameter of the blade member which the said air supply fan has is larger than the diameter of the blade member which the said exhaust air fan has, The heat exchange ventilation apparatus characterized by the above-mentioned . A guide unit that slidably supports the air supply blower at a position where the heat exchanger is disposed;
The heat exchange ventilator according to claim 1, wherein an extraction port for the heat exchanger is formed in the casing.   The guide portion is
  Guide side portions provided around the position where the air supply blower in the casing is disposed, both ends being fixed to the top and bottom surfaces of the casing,
  The heat exchange ventilator according to claim 2, further comprising a guide receiving portion that is fixed to the guide side portion and supports the air supply blower from below. The air supply blower has an outlet portion for blowing air positioned on the opposite side of the heat exchanger, and an air blowing direction from the outlet portion is substantially parallel to a slidable direction of the air supply blower. The heat exchange ventilator according to claim 2 or 3 , wherein the heat exchange ventilator is arranged.