JP4341681B2 - Ventilation equipment - Google Patents

Description

  The present invention relates to a ventilation device used as a bathroom ventilation dryer or the like.

  Conventionally, an intake port for taking in indoor air, an exhaust port for exhausting the intake air to the outside, a blowout port for returning the intake air to the room, and suctioning air from the intake port A ventilator including a blower that blows air and a damper that switches the blowing direction of the air blown from the blower to the exhaust port or the outlet is known (see, for example, Patent Document 1).

  As shown in FIG. 11, such a ventilator returns air blown from the blower 102 from the blower outlet 103 to the room when the damper 101 is switched to the solid line position with the shaft 105 as the rotation center, and the damper 101 Is switched to the chain line position, the air blown from the blower 102 is exhausted to the outside through the exhaust port 104. When the operation of the ventilator is stopped, the damper 101 is in a solid line position and prevents the outside air from flowing into the room.

  When the operation of the ventilator is stopped, the damper 101 is in a solid line position and prevents the outside air from flowing into the room.

The air blown out from the air outlet 103 is heated to warm air by a heater (not shown), and for example, the inside of the bathroom is heated by this warm air.
JP-A-9-126516

  By the way, the damper 101 rotates between the solid line position and the chain line position around the shaft 105. As shown in FIG. 12, the damper 101 rotates with the side end portion 101a of the damper 101 so that the rotation is performed smoothly. A predetermined gap S is formed between the inner wall 106 of the air passage. For this reason, when the damper 101 is switched to the solid line position, outside air enters through the gap S. In particular, when the wind of the outside air is strong, the air volume of the interstitial wind increases, so that the heating effect is reduced when heating the bathroom, and the heating effect is remarkable due to the low temperature in the winter season. There is a problem that the temperature drops, and even when the operation is stopped, there is a problem that chilliness is felt during bathing due to the airflow from the gap S.

  The present invention has been made in view of the above-described problems of the prior art. The object of the present invention is that when the damper closes the exhaust air passage, outside air enters the air outlet from the exhaust air passage. It is to provide a ventilator without air.

The invention of claim 1 includes an intake port for taking in indoor air, an exhaust port for exhausting the intake air to the outside, a blowout port for returning the intake air to the room, and a heater for warming the air. A blower that sucks air from the intake port and blows air, and a damper that switches the blowing direction of the air blown from the blower to the exhaust port or the blower outlet, and the damper is centered on a shaft provided at one end. A ventilation device that switches the blowing direction by rotating, wherein the damper has a surface on the exhaust port side as a back surface and both ends of the shaft of the damper as side portions of the damper. Steps to which both side portions of the back surface of the damper are in close contact are formed on both side surfaces of the exhaust air passage between the damper and the exhaust port, and a side portion on the back surface of the damper and an end surface of the step portion Either side or front Protrusion is provided along the end face extending in the other end side from an end portion of the shaft side, a groove in which the protrusion is inserted is provided on the other of the end surface of the stepped portion and the rear side of said damper is inserted in the heating mode for energizing the heater in the state where the intake port causes positioning the damper in the position for closing the exhaust air path and with said outlet was communicating, to the convex portion said groove It is made to be made to be done.

  According to the present invention, when the damper closes the exhaust air passage, it is possible to prevent outside air from entering the air outlet from the exhaust air passage. For this reason, when the room is heated in winter or the like, it is possible to prevent a decrease in heating efficiency by preventing cold outside air from entering. Moreover, the generation of abnormal noise such as wind noise due to the backflow of outside air is prevented. Furthermore, it can respond to recent highly airtight houses.

Embodiments that are embodiments of a ventilating apparatus according to the present invention will be described below with reference to the drawings.
[First embodiment]
1 and 2, reference numeral 10 denotes a bathroom ventilator. The ventilator 10 has a ventilation case 12 stored in an opening t provided in the ceiling T in advance, and has a screw hole TH in the ceiling T. , And a screw (not shown) through KS. The lower surface of the ventilation case 12 is provided with an air inlet 13 for sucking air in the bathroom and an air outlet 14 for blowing air into the bathroom. A ceramic heater H is provided in the air outlet 14, and air blown out from the air outlet is heated by the ceramic heater H.

  An exhaust port 15 is provided on the side of the ventilation case 12, and the exhaust port 15 communicates with the outside through a duct (not shown). A damper D is provided in the ventilation case 12, and this damper D can be switched between a solid line position, a broken line position, and a chain line position shown in FIG. When the damper D is switched to the solid line position, the air inlet 13 and the air outlet 14 are communicated, and the heating mode is set by energizing the ceramic heater H. When the damper D is switched to the broken line position, the intake port 13 and the exhaust port 15 are communicated to enter the ventilation mode. Further, when the damper D is switched to the chain line position which is an intermediate position, the ceramic heater H is energized to enter a drying mode so that the clothes can be dried. Further, when the ceramic heater H is in a non-energized state, the wind is blown out from the outlet 14 as a cool breeze mode.

  When the operation of the ventilator is stopped, the damper D is switched to the solid line position and the ceramic heater H is in a non-energized state.

  A centrifugal fan F1 is provided in the ventilation case 12 as shown in FIGS. 3 to 5, and the centrifugal fan F1 sucks in air and blows out the sucked air from the blowout port 14 or exhausts 15 It is supposed to exhaust from. M is a motor for rotating the centrifugal fan F1.

  The damper D is provided in an air passage 60 that connects the exhaust port 15 and the air outlet 14, and concave bearing portions 26 and 26 are formed on both side wall portions 17 and 17 of the air passage 60. . Both end portions of a shaft J1 provided at one end of the damper D are rotatably engaged with the bearing portions 26, 26, and the damper D is rotated around the shaft J1. The damper D is rotated by an AC synchronous motor (not shown).

  On both side walls 17 and 17 of the air passage 60, step portions 18 and 18 projecting inwardly between the damper D and the exhaust port 15, that is, the exhaust air passage are formed. The height of the step portions 18, 18, that is, the length extending downward from the top plate 61 of the air passage 60 becomes smaller as the distance from the exhaust port 15 increases. It matches the curvature. That is, the stepped portion 18 has a shape that follows the curved shape of the damper D. As a result, when the damper D is in the heating mode and is in the solid line state, the stepped portion 18 is configured such that the backs on both sides of the damper D are in close contact with the end surface 18a of the stepped portion 18.

  Thereby, at the time of heating mode, as shown in FIG. 6, an exhaust air path is sealed with the damper D, and it is prevented that external air enters into the blower outlet 14 from the exhaust port 15. FIG. For this reason, even when the wind of outside air is strong, it can prevent that the heating effect in a bathroom falls and the chilliness during bathing by a breeze is felt. Further, since the back surfaces of both sides of the damper D are in close contact with the end surface 18a of the step portion 18, the outside air is prevented from flowing backward from the exhaust port 15 to the outlet 14 or the like when the centrifugal fan F1 is stopped. Generation of abnormal noise such as wind noise can be prevented.

In addition, since the exhaust air passage is sealed by the damper D, this ventilation device can correspond to a highly airtight house.
[Second Embodiment]
7 to 9 show a ventilation device 130 of the second embodiment. The ventilation device 130 includes a centrifugal fan F2 provided in the ventilation case 12, a damper 50 that rotates about the axis J2, and the like, as in the first embodiment. The centrifugal fan F2 is attached to a drive shaft Ma2 of an AC induction motor M2 that rotationally drives the fan F2, and the rotation of the centrifugal fan F2 sucks bathroom air from the air inlet 13 and blows it to the air path 60. To do.

  The heater H is sandwiched between the heater cover 59 and the heater base 51, and the heater cover 59 and the heater base 51 are attached in the ventilation case 12. An air outlet 14 is formed at the bottom of the heater base 51.

  The shaft J2 of the damper 50 is rotatably supported by a bearing portion 52 provided on the heater base 51. Ribs L1 and L2 projecting downward are formed on both side edges of the lower surface of the damper 50, and a long hole 53 is provided in the rib L2. Further, a pair of ribs L3 and L4, which are convex portions protruding upward, are provided on both sides of the rear surface of the damper 50 (the upper surface in FIG. 8).

  An electric chamber 55 is defined on the right side of the air passage 60 (in FIG. 8), and an AC synchronous motor M3 is provided in the electric chamber 55. A cam 57 is rotatably mounted on the partition wall 56 of the electric chamber 55, and the cam 57 is driven to rotate by an AC synchronous motor M3. A protrusion 57 is formed on the cam 57, and the protrusion 58 is inserted into the elongated hole 53 of the rib L <b> 2 of the damper 50. As the cam 57 rotates, the damper 50 rotates around the axis J2 to open and close.

  As shown in FIG. 10, step portions 30 and 30 similar to those of the first embodiment are formed on both side wall portions 17 and 17 of the air passage 60, and end surfaces 32 and 32 of the step portions 30 and 30 are formed on the end surfaces 32 and 32. Grooves 31 and 31 that are concave portions are provided along the longitudinal direction. When the damper 50 is closed, the ribs L3 and L3 of the damper 50 are inserted into the grooves 31 and 31 as shown in FIG. Further, the ribs L4 and L4 of the damper 50 are in contact with the side surfaces 33 and 33 of the step portions 30 and 30. Actually, since it is necessary to consider the dimensional accuracy and assembly error of the parts, a slight gap is formed between the ribs L4 and L4 and the side surfaces 33 and 33.

  Further, as shown in FIGS. 7 and 10, a curved wall portion W is formed at the bottom of the exhaust port 15 so as to protrude upward and bend inward to cover the shaft (rotating shaft) J2. The curved wall portion W prevents outside air from entering the air outlet 14 through the gap around the axis J2 of the damper 50.

  According to the ventilator 130 of the second embodiment, when the damper 50 is closed as shown in FIG. 7 in the heating mode, the back surfaces on both sides of the damper 50 are in close contact with the end surfaces 32 and 32 of the step portions 30 and 30. At the same time, the ribs L3 and L3 of the damper 50 are inserted into the grooves 31 and 31 of the step portions 30 and 30 of the air passage 60 as shown in FIG. It is difficult for outside air to enter between the end faces 32 and 32 of the portions 30 and 30. As a result, the effect of preventing the outside air from entering the exhaust port 15 from the exhaust port 15 is higher than that of the first embodiment. Further, since the ribs L4, L4 of the damper 50 abut on the side surfaces 33, 33 of the step portions 30, 30, the prevention effect is further enhanced.

  That is, in the heating mode, even when the outside is a strong wind, it is possible to reliably prevent outside air from entering the outlet 14 from the exhaust port 15, and the heating effect in the bathroom may be reduced. It is possible to surely prevent the chilly feeling during bathing due to the gap air. Further, the back surfaces of both sides of the damper 50 are in close contact with the end surface 32 of the step portion 30, and the ribs L3 and L3 of the damper 50 are inserted into the grooves 31 and 31 of the step portions 30 and 30 of the air passage 60, and further the ribs L4 and L4. Makes contact with the side surfaces 33 and 33 of the stepped portions 30 and 30 to reliably prevent the outside air from flowing back from the exhaust port 15 to the outlet 14 or the like when the centrifugal fan F2 is stopped. Occurrence of abnormal noise such as sound can be reliably prevented, and it is possible to reliably cope with a highly airtight house.

  When the damper 50 is switched to the ventilation position (broken line position), ribs L1 and L2 are formed on both side edges of the damper 50, so that both side edges of the damper 50 and the side wall 60a of the air passage 60 are formed. Air can be prevented from entering the gap between the two and the wind leaking into the bathroom. By preventing the leakage of wind into the bathroom, the ventilation efficiency is improved. Moreover, since the wind does not leak into the bathroom, the bather will not feel uncomfortable.

  In this second embodiment, the grooves 30, 31 are provided in the step portions 30, 30, and the ribs L3, L3, L4, L4 are provided in the damper 50. Conversely, the ribs are provided in the step portions 30, 30, and the damper is provided. 50 may be provided with a groove.

It is the perspective view which showed the external appearance of the bathroom ventilation apparatus which concerns on this invention. It is sectional drawing which showed schematically the structure of the bathroom ventilation apparatus shown in FIG. It is the perspective view which notched some bathroom ventilation apparatuses shown in FIG. FIG. 2 is a perspective view showing a centrifugal fan, a damper, and the like by cutting out a part of the bathroom ventilation apparatus shown in FIG. 1. It is explanatory drawing which showed the step part provided in the air path of the ventilation apparatus shown in FIG. It is explanatory drawing which showed the positional relationship of the damper of the ventilation apparatus shown in FIG. 1, and the step part of an air path. It is the longitudinal cross-sectional view which showed the structure of the ventilation apparatus of 2nd Embodiment. It is sectional drawing which follows the AA line of FIG. It is the bottom view which omitted a part of ventilation device of a 2nd embodiment. It is explanatory drawing which showed the step part provided in the air path of the ventilation apparatus shown in FIG. It is sectional drawing which showed the conventional ventilation apparatus schematically. It is sectional drawing which follows the BB line of FIG.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1,130 Bathroom ventilation apparatus 12 Ventilation case 13 Intake port 14 Outlet F1, F2 Centrifugal fan 17 Side wall part 18,30 Step part 31 Groove (concave part)
50 damper L3 rib (convex)
J2 axis (rotating axis)

Claims (1)

An air inlet for sucking in indoor air, an air outlet for exhausting the intake air to the outside, a blow-out port for returning the sucked air to the room, a heater for warming the air, and air from the air inlet A blower that sucks and blows air and a damper that switches the blowing direction of the air blown from the blower to the exhaust port or the blower outlet, and the damper rotates around the shaft provided at one end to thereby blow the air. A ventilator that switches direction,
Steps where both side portions of the back surface of the damper are in close contact with each other when the exhaust port side surface of the damper is a back surface and both end sides of the shaft of the damper are side portions of the damper It is formed on both sides of the exhaust air passage between the exhaust port and
A convex portion extending from the end on the shaft side to the other end side along the side or the end surface is provided on either the side of the back surface of the damper or the end surface of the stepped portion . groove in which the protrusion is inserted is provided back side and the other of the end surface of the stepped portion, and said air inlet and said air outlet causes positioning the damper to a position to close the discharge air path when in a state of being communicated with the heating mode to energizing the heater, ventilator, characterized in that the convex portion is to be inserted into said groove.

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