JP2014149111A - Ventilation device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent contact between a fixing nut of an exhaust fan and an exhaust filter without deteriorating exhaust performance.SOLUTION: A ventilation device includes: a body 100 having an exhaust inlet 10 on a front surface; a front surface panel 1 which is attached to the front surface of the body 100 so as to cover the exhaust inlet 10 through a space; an exhaust filter 21 which covers the exhaust inlet 10; and an exhaust blower 12 which is installed in the body 100 facing the exhaust filter 21. The exhaust blower 12 includes: an exhaust fan; a motor for driving the exhaust fan; and a fixing nut 31 which is disposed at a center part of a front surface of the exhaust fan and fixes the exhaust fan 28 to a shaft 30 of the motor 29. The exhaust filter 21 includes: at least an outer peripheral rib frame 24; a net filter 22 provided in a frame of the outer peripheral rib frame 24; and a protruding part 23 which is provided at a center part on the front surface side of the net filter 22 and has a cup shaped recess 23a at the rear surface side facing the fixing nut 31.

Description

  The present invention relates to a ventilation device having an exhaust filter between a front panel and an exhaust inlet.

  Conventionally, in order to improve the design, a ventilator is known in which a front panel having a shape covering the front of the exhaust inlet is provided so that the exhaust inlet cannot be seen from the front (see, for example, Patent Document 1).

  In addition, in order to prevent foreign matters such as dust and oil from being sucked from the exhaust inlet and thereby fouling the exhaust blower and the internal air passage, there is also an exhaust filter installed at the exhaust inlet (see, for example, Patent Document 2).

  The exhaust inlet of a ventilator having an exhaust filter installed between the front panel and the exhaust inlet will be described in more detail. In the ventilator, an exhaust fan is provided in a main body fan casing. The main body fan casing is provided with an exhaust inlet, and an exhaust filter is provided so as to cover the exhaust inlet. The main body fan casing is provided with a front panel so as to cover the front surface, and an exhaust passage is provided between the main body fan casing and the front panel. During operation of the exhaust blower, the exhaust is sucked into the exhaust blower from the exhaust inlet via the exhaust passage and the exhaust filter.

  The exhaust blower includes an exhaust fan, a motor that rotates the exhaust fan, a shaft that connects the exhaust fan and the motor, and a fixing nut that fixes the exhaust fan to the shaft.

  The exhaust filter includes a net filter, an outer peripheral rib frame that holds the net filter, and a radial linear rib frame that also holds the net filter.

Japanese Patent No. 4432573 (FIG. 3) Japanese Patent No. 4305248 (FIGS. 1 and 6)

  However, in recent years, there has been a demand for a thinner ventilation device. To that end, it is necessary to narrow the distance between the front panel and the exhaust inlet, and it is also necessary to reduce the thickness of the exhaust filter. However, if the thickness of the outer peripheral rib frame and the straight rib frame is reduced to make the exhaust filter thinner, the rigidity of the straight rib frame becomes lower. Therefore, when a load is applied to the exhaust filter from the front side to the back side by the nozzle of the cleaner or the like when cleaning the net filter, the linear rib frame easily deforms in the direction of the exhaust fan. And there existed a problem that an exhaust filter contacted the fixed nut of an exhaust fan and caused the damage of an exhaust filter.

  Such a problem can be solved by increasing the thickness of the outer peripheral rib and separating the exhaust filter from the main body fan casing. In other words, by separating the exhaust filter from the main unit fan casing, even if the exhaust filter is deformed due to a load from the front to the back side, the contact between the exhaust fan fixing nut and the exhaust filter is prevented. be able to. However, in this case, a new problem arises in that the exhaust flow path is blocked by the increase in the thickness of the outer peripheral rib frame, and the exhaust performance deteriorates.

  In addition, there is a countermeasure to prevent the exhaust filter from deforming by configuring the outer peripheral rib frame and the straight rib frame, which are generally made of resin, with, for example, a highly rigid metal. However, in this case, the workability is low and the cost is low. There was an increasing problem.

  The present invention has been made in order to solve the above-described problems. It is a first object of the present invention to prevent contact between an exhaust fan fixing nut and an exhaust filter without deteriorating exhaust performance. Objective. In addition, a second object is to be able to implement this at a low cost.

  A ventilator according to the present invention has a main body having an exhaust inlet on the front surface, a front panel attached to the front surface of the main body so as to cover the exhaust inlet via a gap, an exhaust filter covering the exhaust inlet, and facing the exhaust filter In the ventilator provided with the exhaust fan installed in the main body, the exhaust fan is disposed in the center of the front surface of the exhaust fan, the motor that drives the exhaust fan, and the exhaust fan. The exhaust filter includes at least an outer peripheral rib frame, a net filter provided in the outer peripheral rib frame, and a center of the surface side of the net filter, and is opposed to the fixing nut. A protrusion having a bottomed depression is provided on the back side.

  According to the ventilator of the present invention, even if a load is applied to the exhaust filter from the front side to the back side and the exhaust filter is deformed, the recess on the back surface of the protrusion functions as a relief for the fixing nut of the exhaust fan. Prevent contact between exhaust filter and fixing nut. In addition, the projecting part is provided in the central part where the air volume is smaller than the outer peripheral part of the exhaust filter, so that the blockage of the exhaust air path can be suppressed compared with the case where the thickness of the outer peripheral rib frame is increased, and the exhaust performance is reduced. Can be suppressed.

It is a disassembled perspective view of the ventilation apparatus which concerns on embodiment of this invention. It is a cross-sectional view of the air passage showing the ventilation state during the ventilation operation of the ventilation device according to the embodiment of the present invention. It is a front view which shows the ventilation state at the time of the ventilation driving | operation of the ventilation apparatus which concerns on embodiment of this invention. FIG. 3 is a cross-sectional view taken along line XX in FIG. 2 showing a ventilation state when the variable louver of the ventilation device according to the embodiment of the present invention is directed downward. FIG. 3 is a cross-sectional view taken along line X-X in FIG. 2 showing a ventilation state when the variable louver of the ventilation device according to the embodiment of the present invention is turned sideways. It is a perspective view which shows the ventilation apparatus which concerns on embodiment of this invention in the state which opened the front panel. It is the perspective view which looked at the exhaust filter of the ventilation apparatus which concerns on embodiment of this invention from the surface side. It is the perspective view which looked at the exhaust filter of the ventilation apparatus which concerns on embodiment of this invention from the back surface side. It is a cross-sectional view which shows the structure of the exhaust inlet part of the ventilation apparatus which concerns on embodiment of this invention.

FIG. 1 is an exploded perspective view of a ventilation device according to an embodiment of the present invention. FIG. 2 is a cross-sectional view of the air passage showing the ventilation state during the ventilation operation of the ventilation apparatus according to the embodiment of the present invention.
In the ventilator according to the embodiment of the present invention, as shown in FIGS. 1 and 2, the main body 100 includes a front casing 3, an intermediate casing 17, and a rear casing 4. The front casing 3 is provided with a front panel 1 on the front surface. An air supply outlet 6 and an indoor exhaust passage 32 are formed between the front casing 3 and the front panel 1. Between the air supply outlet 6 and the indoor exhaust flow path 32, a partition 33 a configured by a rib provided on the back surface of the front panel 1 is provided. Further, a partition 33b made of ribs is also provided on the back surface of the end portion of the front panel 1 on the air supply outlet 6 side. The rear casing 4 is provided with an air supply inlet 8 and an exhaust outlet 9. The inside of the main body 100 is divided into an air passage connecting the room and the outside, that is, an air supply air passage 40 connected from the air supply inlet 8 to the air supply outlet 6 and an exhaust air passage 7 connected from the exhaust inlet 10 to the exhaust outlet 9. It is partitioned by 37. The supply air passage 40 and the exhaust air passage 7 intersect at the heat exchanger 5, and heat exchange is performed between the two air passages. An air supply blower 11 is disposed at the air supply inlet 8 connected to the air supply ventilation path 40, and an exhaust air blower 12 is disposed at the exhaust inlet 10 connected to the exhaust ventilation path 7. The heat exchanger 5 is arranged on the downstream side. Below the heat exchanger 5, a drain pan 16 for receiving condensed water generated in the heat exchanger 5 is provided integrally with the front casing 3.

  Shutters 13 and 14 for opening and closing the air supply inlet 8 and the exhaust outlet 9 are attached to the rear casing 4 side. Among these, the shutter mounting frame on the shutter 13 side is provided with an opening 15 corresponding to the air supply inlet 8, and when the shutters 13 and 14 are opened during the operation of the ventilation fan, the air supply inlet 8 and the opening 15 coincide with each other for ventilation. become able to. Further, when the ventilation fan is not operated, the shutters 13 and 14 are closed to close the air supply inlet 8 and the exhaust outlet 9, and the outside air is prevented from entering.

  The middle casing 17 is a styrene molded box for housing the heat exchanger 5, the supply air blower 11, and the exhaust blower 12, and fits in the front casing 3 and the rear casing 4. The heat exchanger 5 is provided with a protrusion 39 at the bottom, and the protrusion 39 is inserted into a groove 41 provided in the front casing 3 and fixed. Moreover, the lower end of the heat exchanger 5 is located in the area of the drain pan 16, and the generated condensed water is dripped onto the drain pan 16. An air supply filter 18 for removing dust and the like entering from the outside air is disposed on the air supply inflow surface of the heat exchanger 5 housed in the inner casing 17 and is held by the filter holding frames 19 and 20. The filter holding frame 19 is attached to the inner casing 17, and the filter holding frame 20 is attached to the filter holding frame 19. The heat exchanger 5 is provided with a handle 38 so that the heat exchanger 5 can be removed from the inner casing 17, and the air supply filter 18 can be cleaned by removing the handle 38. An exhaust filter 21 (to be described later) that collects dust and the like in the room is also attached to the exhaust inlet 10 of the front casing 3.

  A wind direction variable louver 2 is connected to the front panel 1 so as to be able to swing. When the wind direction variable louver 2 is in a downward direction parallel to the front panel 1, the wind direction of the air supply outlet 6 is downward. When the wind direction variable louver 2 is in the horizontal direction with the wind direction variable louver 2 perpendicular to the front panel 1, The wind direction becomes the forward direction, and the wind direction of the air supply outlet 6 can be varied by the wind direction variable louver 2.

FIG. 3 is a front view showing a ventilation state during a ventilation operation of the ventilation apparatus according to the embodiment of the present invention. 4 is a cross-sectional view taken along the line XX in FIG. 2 showing a ventilation state when the variable louver of the ventilator according to the embodiment of the present invention is directed downward. FIG. 5 is a cross-sectional view taken along the line X-X in FIG. 2 showing the ventilation state when the variable louver of the ventilator according to the embodiment of the present invention is turned sideways.
Next, referring to FIGS. 3, 4 and 5 and FIG. 2 described above, the wind of exhaust a during operation (indicated by black arrows in each figure) and air supply b (indicated by white arrows in each figure) The flow of will be described. The exhaust a is sucked into the main body 100 from the exhaust inlet 10 through the indoor exhaust passage 32 and the exhaust filter 21, enters the main body 100, and is exhausted from the exhaust outlet 9 through the heat exchanger 5. When the wind direction variable louver 2 is downward as shown in FIGS. 3 and 4, the wind approach path to the indoor exhaust flow path 32 is an approach path from the upper and lower right three directions of the front panel 1. In addition, when the wind direction variable louver 2 is sideways as shown in FIG. 5, since the wind direction variable louver 2 blocks the wind approach path from the lower direction to the indoor exhaust flow path 32, the wind direction variable louver 2 enters from the upper right direction. It becomes a route. The air supply b is sucked into the air supply blower 11 from the air supply inlet 8 and enters the main body 100, passes through the heat exchanger 5, and is supplied into the room from the air supply outlet 6.

FIG. 6 is a perspective view showing the ventilator according to the embodiment of the present invention with the front panel opened.
Connection portions 1A connected to the front casing 3 as shown in FIG. 6 are provided on both sides of the upper portion of the rear side of the front panel 1, and the front panel 1 is placed on the front side of the front casing 3 by the connection portions 1A. It is supposed to be retained. In other words, the connecting portion 1A is hinged to the front casing 3 and can rotate. By rotating the connecting portion 1A, the front panel 1 is lifted upward, the front surface of the front casing 3 is exposed, and the heat exchanger 5 or the exhaust filter 21 can be removed. Therefore, cleaning of the heat exchanger 5 or the exhaust filter 21 is easy.

FIG. 7 is a perspective view of the exhaust filter of the ventilator according to the embodiment of the present invention as viewed from the surface side. FIG. 8 is a perspective view of the exhaust filter of the ventilator according to the embodiment of the present invention as seen from the back side.
The exhaust filter 21 includes a net filter 22, an outer peripheral rib frame 24 that holds the net filter 22, an inner peripheral rib frame 25, and a linear rib frame 26 that is provided radially as shown in FIGS. The outer peripheral rib frame 24, the inner peripheral rib frame 25, and the linear rib frame 26 are molded with resin. Further, the exhaust filter 21 is provided with a protrusion 23 having a cylindrical outer shape at the center on the surface side. The back surface side of the protrusion 23 is a bottomed cylindrical recess 23a, and the interior of the recess 23a is hollow. The net filter 22 covers the space between the outer peripheral rib frame 24, the inner peripheral rib frame 25, and the straight rib frame 26 excluding the recess 23 a of the protrusion 23. Of the straight rib frame 26, when the exhaust filter 21 is attached to the front casing 3, the straight rib frames 26a and 26b extending in a direction parallel to the exhaust a sucked into the indoor exhaust flow path 32 from above and below are shown in FIG. As shown in FIG. 7, the thickness is increased from the outer peripheral rib frame 24 toward the protrusion 23.

  For fixing the exhaust filter 21 and the front casing 3, a screw fixing portion 34 and a fixing claw portion 35 provided on the outer peripheral rib frame 24 of the exhaust filter 21 and an insertion portion 36 provided on the front surface of the front casing 3 (see FIG. 6) is used. The insertion portion 36 has a shape that matches the corner of the outer peripheral rib frame 24, and the fixed claw portion 35 is elastic. Therefore, the exhaust filter 21 is firmly fixed by inserting the corners of the outer peripheral rib frame 24 into the insertion portion 36 and hooking the claws into the holes corresponding to the fixing claws 35 provided on the front surface of the front casing 3. it can. Further, the exhaust filter 21 is fixed by screwing the screw fixing portion 34 and the screw hole provided in the front surface of the front casing 3. Since the exhaust filter 21 is screwed in this manner, it cannot be attached or detached unless a tool is used, and the fan is not touched carelessly.

FIG. 9 is a cross-sectional view showing the structure of the exhaust inlet portion of the ventilator according to the embodiment of the present invention.
As shown in FIG. 9, an exhaust inlet 10 is provided in the front casing 3, and an exhaust blower 12 is disposed so as to face the exhaust inlet 10. The exhaust blower 12 includes an exhaust fan 28, a motor 29 that rotates the exhaust fan 28, a shaft 30 that connects the exhaust fan 28 and the motor 29, and a fixing nut 31 that fixes the exhaust fan 28. Further, the front casing 1 is attached to the front casing 3 so as to cover the front surface, and the front casing 3 and the front panel 1 form an indoor exhaust passage 32. The front casing 3 is provided with the aforementioned exhaust filter 21 so as to cover the exhaust inlet 10 with the surface facing the front panel 1 side.

  In the ventilator according to the embodiment of the present invention having the above-described configuration, when the net filter 22 is cleaned, a load is applied to the exhaust filter 21 from the front to the back by a nozzle of a vacuum cleaner or the like, and the linear rib frame 26 is exhausted. Even when deformed toward the blower 12, the recess 23 a on the back surface of the protrusion 23 provided on the exhaust filter 21 functions as a relief of the fixing nut 31 of the exhaust fan 28. For this reason, contact between the exhaust filter 21 and the fixing nut 31 is prevented, and damage to the exhaust filter 21 can be avoided.

  Further, the exhaust passes through the exhaust filter 21 and the exhaust inlet 10 from the indoor exhaust passage 32 and is sucked into the exhaust blower 12. The flow rate of the exhaust gas that passes through the exhaust filter 21 is greater in the outer peripheral portion than in the central portion of the exhaust filter 21. In the present embodiment, the projecting portion 23 is disposed in the central portion where the air volume is smaller than the outer peripheral portion of the exhaust filter 21. For this reason, the fall of exhaust performance can be suppressed.

  Moreover, since the external shape of the protrusion part 23 is formed in the column shape, there is no corner part on the side surface, the turbulence of the exhaust flow does not occur, and the deterioration of the exhaust performance can be prevented.

  Further, since the recess 23a on the back surface of the protruding portion 23 has a bottomed cylindrical shape, it can function as a relief of the fixing nut 31 up to the vicinity of the bottom of the recess in comparison with the arch shape or the cone shape. For this reason, the height of the protrusion part 23 can be made low, the indoor exhaust flow path 32 is not blocked, and the fall of ventilation performance can be suppressed.

  The straight rib frame 26 connects the outer peripheral rib frame 24 and the projecting portion 23, and is parallel to the exhaust a that is sucked into the indoor exhaust flow path 32 from the up and down direction when the exhaust filter 21 is attached to the front casing 3. The thickness of the linear rib frames 26a and 26b extending in the direction to be increased from the outer peripheral rib frame 24 toward the projecting portion 23. As described above, the exhaust flow rate is larger in the outer peripheral portion than in the central portion of the exhaust filter 21, and therefore ventilation caused by the blockage of the indoor exhaust flow path 32 rather than uniformly increasing the thickness of the straight rib frame 26. A decrease in performance can be suppressed, and the rigidity of the linear rib frame 26 can be increased. Here, the two thicknesses of the straight rib frames 26a and 26b are increased from the outer peripheral rib frame 24 toward the projecting portion 23. However, all the thicknesses of the linear rib frames 26 provided radially are set to the outer peripheral ribs. You may make it thicken as it goes to the protrusion part 23 from the frame 24. FIG. Even in such a case, since the thickness of the outer peripheral side is thinner than that of the inner peripheral side in all of the radial linear rib frames 26, an effect of suppressing a decrease in ventilation performance can be obtained, and rigidity can be increased.

  Further, the exhaust filter 21 can be manufactured at low cost because the projecting portion 23, the outer peripheral rib frame 24, the inner peripheral rib frame 25, and the linear rib frame 26 are molded of resin.

  Moreover, since the fall of ventilation performance can be suppressed and the contact with the exhaust filter 21 and the exhaust air blower 12 can be prevented, without extending the space | interval of the front panel 1 and the front casing 3, it can contribute also to thickness reduction of a ventilator. .

  INDUSTRIAL APPLICABILITY The present invention is useful as a ventilation device that is attached to the inside of a building in order to exhaust indoors to outdoors or supply air from outdoors to indoors.

  DESCRIPTION OF SYMBOLS 1 Front panel, 1A connection part, 2 Wind direction variable louver, 3 Front casing, 4 Rear casing, 5 Heat exchanger, 6 Supply air outlet, 7 Exhaust ventilation path, 8 Supply air inlet, 9 Exhaust outlet, 10 Exhaust inlet, 11 Air supply blower, 12 Exhaust blower, 13, 14 Shutter, 15 Opening, 16 Drain pan, 17 Middle casing, 18 Air supply filter, 19, 20 Filter holding frame, 21 Exhaust filter, 22 Net filter, 23 Projection, 23a Indentation , 24 outer peripheral rib frame, 25 inner peripheral rib frame, 26, 26a, 26b linear rib frame, 28 exhaust fan, 29 motor, 30 shaft, 31 fixing nut, 32 indoor exhaust flow path, 33a, 33b partition, 34 fixing portion, 35 fixing claw part, 36 insertion part, 37 partition plate, 38 handle, 39 protrusion, 40 air supply ventilation , 41 grooves, 100 main body, a discharge, b supply.

Claims (3)

A main body having an exhaust inlet on the front surface, a front panel attached to the front surface of the main body so as to cover the exhaust inlet via a gap, an exhaust filter covering the exhaust inlet, and the main body facing the exhaust filter In a ventilator equipped with an exhaust blower installed inside,
The exhaust blower is
An exhaust fan,
A motor for driving the exhaust fan;
A fixing nut that is disposed in the center of the front surface of the exhaust fan and fixes the exhaust fan to the shaft of the motor;
The exhaust filter
At least an outer peripheral rib frame,
A net filter provided in the frame of the outer peripheral rib frame;
A ventilator comprising: a protrusion provided with a bottomed depression on a back surface side provided at the center of the surface side of the net filter and facing the fixed nut.   The ventilator according to claim 1, wherein the projecting portion has an external shape formed in a columnar shape.   The exhaust filter further includes a linear rib frame that connects the outer peripheral rib frame and the protruding portion, and the thickness of the linear rib frame increases from the outer peripheral rib frame toward the protruding portion. Or the ventilation apparatus of 2.

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