JP2005083587A - Ventilation fan - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a ventilation fan capable of preventing a charging part of an electric system and an indoor wall face from being wetted, even when misty water droplets are sucked, simplifying the assembling of electric components, and having a function of protecting them from the water and the like. <P>SOLUTION: This ventilation fan comprises a main body 3 having a cylindrical wind channel 2 mounted in a state of being inserted into a pipe 1 or a duct communicating the inside and outside of the room, and an air blower forming the ventilation flow by rotating an impeller 4 in the air channel 2, a flange part 6 connected with an outer periphery of an indoor-side opening part of the air channel 2 of the main body 3, having a flat part 7, and being radially projected, and a raised part 8 formed on an edge of the flange part 6 and projecting to a back side kept into contact with the indoor-side wall face at its end face. An accommodating part 13 continued to the back face of the flange part 6 is defined by the air channel 2, the flange part 2 and the raised part 8, and a package 14 provided with a connecting terminal 15 at its upper side, and a power source switch 17 at its lower side is accommodated in the accommodating part 13. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a ventilation fan that is attached to a pipe or duct that communicates indoors and outdoors and exhausts indoor air to the outside for ventilation, or supplies outdoor air to the room for ventilation.

  In a highly airtight and highly insulated house, there is a problem that the number of ventilations is insufficient, causing stagnation of harmful substances such as formaldehyde and generation of mold and mites. A ventilator that constantly ventilates is effective for such problems, and in recent years, a ventilator that provides 24-hour ventilation has been developed. In addition, there exist the technique disclosed by patent document 1 and patent document 2 as a prior art about this kind of ventilation fan.

Japanese Patent Laid-Open No. 11-304215 JP 09-96432 A

  Conventional ventilation fans have been devised to avoid forgetting to turn on the power switch after maintenance or to prevent the occurrence of condensation. However, because it is always operated when fog is generated or drizzle because of ventilation, mist-like water droplets are sucked together with air and become condensed water when it is especially ventilated by air supply. There is a problem of dripping from the filter to wet the charged part of the electrical system or to wet the wall surface of the room. In addition, there is a problem that both noise and power consumption are high for continuous operation.

  The present invention has been made to solve the above-described problems, and the problem is that even if mist-like water droplets are sucked, the charged part of the electric system is wetted or the wall surface of the room is wetted. It is to obtain a ventilation fan with no noise, to obtain a ventilation fan having a function capable of easily assembling electrical parts and protecting it from water and the like, and to obtain a ventilation fan having low noise and low power consumption.

  In order to solve the above problems, the present invention includes a cylindrical wind tunnel that is inserted into a pipe or duct that communicates indoors and outdoors, and a main body that includes a blower that rotates in the wind tunnel to form a ventilation flow. To the back side, which is connected to the outer periphery of the opening on the indoor side of the wind tunnel of the main body, is formed on the edge of the flange part that has a flat part and extends in the radial direction, and the end face is in contact with the wall surface on the indoor side A projecting rising part is provided, and the wind tunnel, flange part, and rising part define a continuous storage part on the back of the flange part, and the quick connection terminal is stored in the storage part on the upper side and the power switch is stored on the lower side. Adopting means to encase the package.

  In order to solve the above-mentioned problems, another invention provides a cylindrical wind tunnel that is inserted into and installed in a pipe or duct that communicates indoors and outdoors, and a ventilation flow that the impeller rotates in the wind tunnel toward the indoor side from the outside of the room. A main body having a blower to be formed, a radially extending flange portion having a flat surface portion, which is continuously provided on the outer periphery of the indoor side opening portion of the wind tunnel of the main body, and a decorative grille that wraps the outside of the flange portion. A filter frame that protrudes indoors to surround the opening is provided at the opening, and the lower part of the filter frame employs means as a bank structure that allows the filter to be removed from the bank structure and the filter frame.

  In the present invention, a wind tunnel, a flange portion, and a rising portion define a storage portion that is continuous with the rear surface of the flange portion, and a package containing a quick-connect terminal on the upper side and a power switch on the lower side is stored in the storage portion. Therefore, it is possible to easily assemble the wired electrical parts together by mounting the package, and to protect the charging unit from water and dust.

  In another aspect of the invention, a filter frame that protrudes indoors so as to surround the opening is provided at the opening on the indoor side of the wind tunnel, and the lower part of the filter frame is formed as a bank structure in the bank structure and the filter frame. Since the filter is detachably provided, the mist-like water droplets adhering to the filter are blocked by the filter frame, flow down along the filter, and accumulate in the lower weir. Condensed water accumulated in the weir is sucked up by the filter and evaporated by blowing air, so that it does not wet the charging part or the wall surface in the room.

  A cylindrical wind tunnel that is inserted into a pipe or duct that communicates with the interior of the room from the inside of the room, and a blower that rotates a propeller-type impeller in the wind tunnel to form a ventilation flow from the outside of the room toward the inside of the room. Configure the main body. A flange portion extending in the radial direction having a flat surface portion is continuously provided on the outer periphery of the indoor side opening portion of the wind tunnel of the main body. At the end edge of the flange portion, a rising portion that protrudes toward the back side where the end surface comes into contact with the wall surface on the indoor side is provided. The wind tunnel, the flange portion, and the rising portion define a storage portion that is continuous with the rear surface of the flange portion. A package containing a quick-connect terminal on the upper side and a power switch on the lower side is housed in the housing portion and attached.

  A filter frame is provided at the opening on the indoor side of the wind tunnel of the flange portion so as to protrude to the indoor side so as to surround the opening. The lower part of the filter frame is provided as a dike structure that is open only in the upper part, and the filter can be removed in the dike structure and the filter frame. As a result, the electrical components can be easily assembled together by mounting the package, and the charging unit can be protected from water and dust. Then, the mist-like water droplets sucked together with the sucked air flow and adhered to the filter are blocked by the filter frame, flow down along the filter, and accumulate in the lower weir. Condensed water accumulated in the weir is sucked up by the filter and evaporated by blowing air, so that it does not wet the charging part or the wall surface in the room.

Embodiment 1 FIG.
1 is a cross-sectional view showing a ventilation fan according to the present embodiment, FIG. 2 is a perspective view from the front view, FIG. 3 is a perspective view from the rear view, FIG. 4 is an exploded perspective view, and FIG. It is. The ventilation fan of this Embodiment is related with the ventilation fan inserted and installed in the pipe 1 and duct which connect indoors and outdoors from the indoor side. This ventilation fan is mainly composed of a resin main body 3 having a cylindrical wind tunnel 2 to be inserted into a pipe 1 and the like, a blower composed of a propeller impeller 4 and a motor 5. The main body 3 includes a substantially square flange portion 6 projecting in the radial direction at the mouth edge portion of the opening portion serving as a suction port or a blow-out port in the front portion of the wind tunnel 2. The flange portion 6 is provided with a rising portion 8 that protrudes toward the back side where the end surface abuts against the wall surface on the indoor side at the edge of the flat surface portion 7 that extends in the radial direction. A bell mouth 9 having an inner diameter of about 50 to 70% of the outer diameter of the impeller 4 is detachably attached to the central opening of the flange portion 6. On the rear end side of the wind tunnel 2, a motor mounting structure 10 is formed by integral molding.

  The motor mounting structure 10 is composed of three leg portions extending rearward along the center line direction of the wind tunnel 2 at intervals in the circumferential direction, all of which are from the outer periphery of the wind tunnel 2. A leaf spring (not shown) with a warp for holding the main body 3 in the pipe 1 or the duct by a radially expanding elastic force is mounted on the inside of the two inside. The motor 5 is screwed to the motor mounting structure 10 at the flange of the outer shell 11 so that the rotating shaft protrudes on the center line of the wind tunnel. The impeller 4 is fitted and mounted on a rotating shaft extending on the center line in the wind tunnel 2 of the motor 5 so as to be included in the bell mouth 9, and the flange portion 6 constituting the front portion of the main body 3 is attached to the rotating portion. A detachable decorative grill 12 is mounted so as to enclose the flange portion 6.

  The cylindrical wind tunnel 2 of the main body 3, the substantially square flange portion 6, and the rising portion 8 define a storage portion 13 that is continuous with the rear surface of the flange portion 6. A package 14 configured as an angle-shaped container having three upper and lower corners is detachably fitted to the storage portion 13. Electrical components such as the quick connection terminal 15 and the voltage dividing capacitor 16 are stored in the upper two corners of the package 14 in an electrically wired state, and the power supply is electrically connected in the lower corner. A switch 17 is housed. By disposing the power switch 17 at this position, the power switch 17 is presented at the lower part of the main body 3 so that it is easy to operate. Even if the power switch 17 is temporarily turned off due to maintenance or a typhoon, it remains as it is. You can avoid being unaware of being in a state. The package 14 is configured to be fitted by detachable stamping coupling between the two parts 18 and 19 on the flange portion side and the wall surface side by flame retardant resin. The connecting portion with the motor lead 20 is performed on the upper side of the package 14, and the connecting portion between the quick connection terminal 15 and the external electric wire is performed at the open portion on the lower side, and the open portion is covered with the connection completed. 21.

  The electric system has a circuit configuration as shown in FIG. Since the starting capacitor of the motor 5 is built in the motor and does not have the auxiliary coil winding which is a means for changing the motor power, there are two lead wires as shown in FIG. For this reason, in the small air volume ventilation fan that lowers the power, the motor 5 is designed to have a good matching with the blade load and the motor efficiency is good, and the secondary resistance of the rotor is set so that it can be operated almost at the same operating speed of 50 Hz and 60 Hz. The power is adjusted by connecting a voltage dividing capacitor 16 in series in this best matching state.

  This ventilation fan is intended to provide constant ventilation, and a power switch 17 is provided at the lower part of the main body 3 so as to eliminate the need for electric wiring work for attaching a wall switch that takes time and effort. In addition, since it is used for regular ventilation, there is little concern in the exhaust operation, but in the air supply operation, measures are taken against water wetting due to the inhalation of mist-like water droplets, such as when fog is generated or during drizzle. That is, in order to protect the electrical components from water, not only the quick connection terminal 15 but also the electrical components such as the power switch 17 and the voltage dividing capacitor 16 are housed in the package 14 including the charging unit. The package 14 is virtually free of water intrusion due to the stamped joint where the wall-side component 19 overlaps and fits the flange-side component 18. Further, since the motor lead 20 is also connected from the upper part of the package 14, water does not flow through the motor lead 20. Even if the electrical parts generate heat, there is no worry because the package 14 is made of flame-retardant resin. Packaging electrical components also has the effect of improving assembly in addition to measures against water.

  Since the bell mouth 9 having an inner diameter of about 50 to 70% of the outer diameter of the impeller is provided, the static air pressure is increased although the open air volume is reduced compared to the case where the bell mouth 9 is not provided. That is, since the axial fan has a large air volume and a low static pressure, the static air pressure decreases when the air volume is very small. For example, the outdoor wind resistance decreases or the ventilation air volume changes due to a change in the indoor static pressure. Trouble occurs. In general, when the bell mouth 9 having an inner diameter of about 70% of the outer diameter of the impeller 4 is provided, the static pressure increases more than twice when the open air volume is the same. Further, in a normal axial fan, when the substantial opening portion is not on the front surface but on the peripheral surface as in the case of the decorative grill 12, and the airflow is biased, the static pressure rapidly decreases and the noise increases. This is not the case with this ventilation fan, and good ventilation is achieved.

Embodiment 2. FIG.
The present embodiment shown in FIGS. 6 to 11 mainly relates to a ventilation fan that performs ventilation by supplying air. The configuration of the basic part is the same as that shown in the first embodiment. Therefore, the same reference numerals as those of the first embodiment are used for the same parts as those of the first embodiment, and the description thereof is omitted.

  As shown in the sectional view of FIG. 6 and the exploded perspective view of FIG. 9, this ventilation fan has the motor 5 and the impeller 4 in positions opposite to those of the first embodiment. That is, the motor 5 is located on the indoor side, and the impeller 4 is located on the outdoor side. A cylindrical bell mouth 9 having an inner diameter of about 50 to 70% of the outer diameter of the impeller 4 is detachably attached so as to cover the suction outer peripheral surface of the impeller 4. A decorative grill 12 that wraps the outside of the flange portion 6 is detachably attached to the main body 3. A rectangular filter frame 22 that protrudes indoors so as to surround the opening is integrally provided at the opening on the indoor side in the center of the flat surface portion 7 of the flange portion 6. The lower part of the filter frame 22 has a bank structure 23 that is open only upward, and a square filter 24 is detachably provided in the bank structure 23 and the filter frame 22 (see FIG. 7).

  As the filter 24, a sheet of electrostatically processed paper called a high-performance filter processed into a wave shape is used. The thickness of the filter 24 is about 13 mm, and a non-woven fabric is stuck on the outer peripheral portion. On the inner side of the filter frame 22, ribs 26 are formed so as to contact the back surface of the filter 24 and form a gap 25 between the filter 24 and the flat surface portion 7. The filter 24 fitted into the filter frame 22 By mounting, positioning is performed between the protrusion 27 provided on the back surface of the decorative grill 12 and the end surface of the outer shell 11 of the motor 5. The motor lead 20 is positioned and accommodated in the interval 25 formed by the ribs 26, drawn upward along the inner surface of the filter frame 22, and out of the filter frame 22 from the notch groove in the upper part of the filter frame 22. It is pulled out, positioned by the ribs 28, and drawn around the back of the main body 3 through the notch of the main body 3. On the upper surface and the left and right surfaces of the decorative grill 12, there are provided louvers 29 which are provided with blowing openings, which can change the blowing direction, and which can be fully closed (FIGS. 7 and 7). 8). A heat insulating material 30 is pasted on the front back side of the decorative grill 12 constituting the design surface.

  With this ventilation fan, it is possible to perform regular ventilation by supplying air. When the outside air is highly humid, such as when fog is generated or when it is drizzle, mist-like water droplets are included in the suction airflow. The sucked water droplets are divided into those that pass through the filter 24 and those that adhere to the filter 24. When the amount adhering to the filter 24 gradually increases, the filter 24 is finally clogged with water, and the supply of outside air into the room stops. Condensed water adhering to the filter 24 is prevented from moving to the surface side of the flange portion 6 by the filter frame 22 and is temporarily stored in the bank structure 23 below the filter frame 22. Since the filter 24 is fully closed by the dew condensation water and the replenishment of water is lost, the dew condensation water does not overflow from the bank structure 23. When the generation of mist stops, normal outside air is blown into the filter 24 instead of high humidity outside air, and the condensed water adhering to the surface of the filter 24 is dried in about one hour. Condensed water collected in the bank structure 23 is also sucked up by the filter 24 and dried in several hours by the outside air passing therethrough. In this way, by providing the bank structure 23, it is possible to cope with the occurrence of a normal mist without the trouble of treating the condensed water. However, when fog is generated for a very long time, the operation may be stopped by operating the power switch 17 temporarily. In this case, since the power switch 17 is located at the lower part of the main body 3, it can be easily operated. However, the suction opening may be fully closed by the louver 29 to stop the supply of the high humidity outside air.

  When the gap 25 is provided between the filter 24 and the flat surface portion 7 of the flange portion 6, the outside air uniformly passes through the entire surface of the filter 24, so that the pressure loss of the filter 24 is reduced and noise is reduced. Even when 24 is clogged with dust or the like, the increase in pressure loss can be kept low. Since the motor lead 20 is processed at this interval 25, the condensed water that has condensed on the outer shell 11 of the motor 5 does not travel along the motor lead 20 and drips outside the main body 3. And since the filter frame 22 is comprised integrally with the main body 3, the heat insulation process of a connection part is unnecessary like the case where it comprises with another body, and there is no fear of a water leak.

  Since the bell mouth 9 having an inner diameter of about 50 to 70% of the outer diameter of the impeller 4 is provided, the static air pressure is increased although the open air volume is lower than that without the bell mouth 9. In other words, since the axial fan has a large air volume and a low static pressure, if the air volume is very small, the rotational speed varies and the static pressure decreases. In such a case, the blade load can be adjusted by reducing the inner diameter to 50% of the outer diameter of the impeller 4. Even if the pressure loss of the filter 24 is applied or the pressure loss increases due to clogging of the filter 24 or the like as compared with the case of exhaust, the static pressure is increased as compared with the case without the bell mouth 9. There is little deterioration and sufficient ventilation can be done.

  In the air supply operation, for example, in the winter, when the indoor temperature is 20 ° C. and the outdoor temperature is about −5 ° C., condensation is likely to occur at the boundary between the indoor air and the outdoor air. And warm air in the room are easy to mix. However, in this ventilation fan, there is no fear of condensation at the filter frame 22, and it is the design surface of the decorative grill 12 that is concerned about condensation. Generation | occurrence | production of the dew condensation on the design surface is prevented by sticking to the back surface of the heat insulating material 30. FIG. The outdoor cool air is rectified by passing through the filter 24, hits the back of the decorative grill 12 in a uniform flow, and is blown out upward and left and right by the louver 29. For this reason, even if the heat insulating material 30 on the back surface of the decorative grill 12 is thin, the effect is exhibited. Since this heat insulating structure portion does not require a close contact structure with the filter 24, a hard heat insulating material 30 having a low waist and easy to handle can be used instead of a soft heat insulating material with poor workability. With respect to the louver 29, outdoor air uniformly passes through the front and back, so that a temperature difference is difficult to occur and no condensation occurs.

  In general, an axial-flow type blower is suitable for specifications with a low static pressure and a large air volume, and dust hardly adheres to the axial flow blade. A small axial flow type blower is driven by a motor called a condenser run induction motor. Since the blade load is low, it is driven to rotate around the synchronous speed of the motor and is operated at a high efficiency point. And it is characterized by very low noise, low power consumption and long motor life. However, when the frequency is 50 Hz and 60 Hz, the rotational speed is about 20% higher than 50 Hz when the rotational speed is 60 Hz, and the driving noise is also increased by 5 dB. In other words, if it is possible to operate at substantially the same operating speeds of 50 Hz and 60 Hz, the operating noise at 60 Hz can be reduced by 5 dB, and the noise can be reduced with the noise reduction of the impeller 4.

  In order to power down the motor 5 in a small ventilation fan, it is necessary to wind a large amount of very thin windings, so there is a winding limit on the manufacturing side. It is adjusting. That is, the secondary resistance of the rotor (rotor) is increased. FIG. 10A shows the load characteristics when the power is adjusted at the expense of motor efficiency by increasing the secondary resistance of the rotor. Since it is rotationally driven at the intersection of the blade load curve and the torque curve, the operating rotational speed of 50 Hz and 60 Hz is about 20% higher than 50 Hz in the case of 60 Hz as described above. On the other hand, FIG. 10B shows the load characteristics when the power is adjusted by the voltage dividing capacitor 16 in a state where the secondary resistance of the rotor is reduced and the efficiency is high. The 50 Hz torque curve exceeds the 60 Hz torque curve at a certain rotational speed. The operating rotational speeds of 50 Hz and 60 Hz are smaller than in the case of FIG. 10A, and the maximum torque is also small.

  Since the starting capacitor of the motor 5 is built in the motor 5 and does not have the auxiliary coil winding which is a means for changing the motor power, the lead wire is two wires as shown in FIG. For this reason, in the small air volume ventilation fan that lowers the power, the motor 5 is designed to have a good matching with the blade load and the motor efficiency is good, and the secondary resistance of the rotor is set so that it can be operated almost at the same operating speed of 50 Hz and 60 Hz. The power is adjusted by connecting a voltage dividing capacitor 16 in series in this best matching state. The quick connection terminal 15 has a two-part configuration, and is installed apart from the two poles. In the unlikely event that water enters, the different poles of the power source are separated from each other. In addition, in a ventilation fan that can be switched between strong and weak, a selector switch 31 is inserted in series with the power switch 17 as shown in FIG. Thereby, the driving noise of 60 Hz is greatly reduced, and the power consumption is also reduced.

It is sectional drawing of a ventilation fan. (Embodiment 1) It is a perspective view in the front view of a ventilation fan. (Embodiment 1) It is a perspective view in the rear view of a ventilation fan. (Embodiment 1) It is a disassembled perspective view of a ventilation fan. (Embodiment 1) It is a circuit block diagram of the electric system of a ventilation fan. (Embodiment 1) It is sectional drawing of a ventilation fan. (Embodiment 2) It is a perspective view in the front view of a ventilation fan. (Embodiment 2) It is a perspective view in the rear view of a ventilation fan. (Embodiment 2) It is a disassembled perspective view of a ventilation fan. (Embodiment 2) It is explanatory drawing which showed the load characteristic of the motor of the ventilation fan. (Embodiment 2) It is a circuit block diagram of the electric system of a ventilation fan. (Embodiment 2)

Explanation of symbols

  2 wind tunnel, 3 main body, 4 impeller, 5 motor, 6 flange part, 7 plane part, 8 rising part, 9 bell mouth, 11 outer shell, 12 makeup grille, 13 storage part, 14 package, 15 quick connection terminal, 16 Voltage divider capacitor, 17 power switch, 22 filter frame, 23 bank structure, 24 filter.

Claims (10)

  A cylindrical wind tunnel that is inserted into a pipe or duct that communicates indoors and outdoors, a main body including a blower in which the impeller rotates in the wind tunnel to form a ventilation flow, and an opening on the indoor side of the wind tunnel of the main body A flange portion extending in a radial direction having a flat surface portion, formed on an edge of the flange portion, and having a rising portion projecting to the back side where the end surface is in contact with the wall surface on the indoor side, A package in which the wind tunnel, the flange portion, and the rising portion define a storage portion that is continuous with the rear surface of the flange portion, and in this storage portion, a quick connection terminal is stored on the upper side and a power switch is stored on the lower side. Ventilation fan containing.   The ventilation fan according to claim 1, wherein the package is formed of a flame-retardant resin molding.   3. The ventilation fan according to claim 1, wherein the power adjustment of the blower is performed by a voltage dividing capacitor connected in series with the motor, and the voltage dividing capacitor is housed on the upper side of the package. .   It is a ventilation fan in any one of Claim 1- Claim 3, Comprising: The ventilation fan which comprised the package by the fitting which can engage / disengage two parts of the flange part side and a wall surface side.   The ventilation fan according to any one of claims 1 to 4, wherein the flange portion of the main body is formed in a substantially square shape, the package is formed into an angle shape having three corner portions, and two upper portions of the package are formed. A ventilation fan that houses electrical components such as quick-connect terminals in the corner and a power switch in one corner.   A main body equipped with a cylindrical wind tunnel that is inserted into a pipe or duct that communicates with the outside of the room, and a blower that rotates in the wind tunnel to form a ventilation flow from the outside of the room toward the inside of the room. A flange portion extending in the radial direction having a flat surface portion and a decorative grille that wraps the outside of the flange portion is provided on the outer periphery of the indoor side opening portion of the wind tunnel. A ventilating fan is provided with a filter frame projecting indoors so as to surround the section, and the lower part of the filter frame is a bank structure so that the filter can be removed in the bank structure and the filter frame.   The ventilating fan according to claim 6, wherein a rising portion projecting toward the back side where the end surface is in contact with the wall surface on the indoor side is provided at an edge of the flange portion of the main body, and the wind tunnel, the flange portion, and the rising portion A ventilating fan in which a storage portion of a continuous form is defined on the rear surface of the flange portion, and in this storage portion, a package containing a quick-connect terminal on the upper side and a power switch on the lower side.   The ventilation fan according to claim 6 or 7, wherein a gap is provided between the back surface of the flange portion and the filter, and the motor lead of the blower is connected to the inner surface of the filter frame at the gap portion. A ventilation fan that is routed to the top and electrically connected to the back of the main unit at the top.   The ventilation fan according to any one of claims 6 to 8, wherein the position of the filter is sandwiched between a protrusion provided on the back surface of the decorative grille and an outer shell end surface of the motor.   The ventilation fan according to any one of claims 6 to 9, wherein a bell mouth having an inner diameter of about 50 to 70% of an outer diameter of the impeller is provided outside the wind tunnel.

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