JP2000097194A - Blower, blower manufacturing method, blower disassembly method - Google Patents

Abstract

(57) [Summary] [Problem] To solve the problem related to recycling of ventilation equipment such as a ventilation fan. SOLUTION: The whole of an impeller, which is rotated by a motor and forms an airflow for ventilation in an air passage, is made of a metal molded product obtained by injection molding a low melting point metal. Further, the motor is built in the blade or the motor mounting leg is used as the air flow outlet side to provide a thin device.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ventilating device such as a ventilating device for ventilating a ventilating fan, a ventilating device or a terminal of a ventilating system, and more particularly to an improvement in recyclability of the blowing device. Things. Also, the present invention relates to thinning and performance improvement of a metal blower.

[0002]

2. Description of the Related Art Many electric devices, including ventilation devices such as ventilation devices, are made of various types of materials such as various metals and plastics. For example, many of the housings are made of an iron plate or various plastics, and a motor or the like has a configuration in which iron, copper, and aluminum are mixed. Plastics have a well-established molding technology and are widely used in electrical machinery because of their light weight and low cost as structural materials. In many ventilation devices such as a ventilation device, an impeller, a body frame, a makeup grill, and the like are made of plastic. However, some ventilation devices are subject to restrictions on disaster prevention depending on the installation location, and such ventilation devices require metal properties, and many of the casing and the impeller are made of steel plates. Therefore, several materials having different properties are mixed in one ventilation device, and it is very difficult to separate each material when discarded. Plastics that are lightweight, inexpensive and can be molded in complex shapes have been highly evaluated as highly effective structural materials, but tend to be avoided from the viewpoint of recycling.

Under these circumstances, magnesium alloys have begun to attract attention as structural materials. Magnesium alloys are lightweight, have much higher rigidity than plastics, and are easier to recycle than plastics. For example, JP-A-9-135408 and JP-A-9-135409 disclose the front of a television receiver. A technique is disclosed in which a cabinet or the like is made of a magnesium alloy injection molded product. These take advantage of the fact that they can be easily formed into a complex shape of a magnesium alloy, are lightweight and have a texture, and provide a television receiver that can be easily recycled at the time of disposal. On the other hand, according to the book Magnesium published on January 15, 1997, The Stor
Many products using magnesium are described in y of Magnesium (ASM, 1949). For example, there is a description that magnesium is used for an impeller, which is a fan of a cooling tower.

In a conventional metal sirocco fan, a plurality of blades made of a thin steel plate are connected by caulking to the outer periphery of a main plate made of a thin steel plate. The propeller fan is obtained by caulking a boss constituting a rotating shaft to a blade made of a thin steel plate which is integrally drawn. FIG. 15 is a view for explaining the structure of a conventional metal blower, where the upper half describes the outline and the lower half describes the cross section of the center line, and 31 is a thin steel plate. The propeller fan 3 and the like are supported by motor mounting legs 34, and the propeller fan is fixed by the rotating shaft 5 with the blade fixing screw 37 to rotate the blade 28. The 34 is a motor supported by the mounting screws 35 and 36. The other is a motor mounting leg fixed to the fan casing 32 via the fan mounting flange 26. Fan casing 3 to be mounted on walls or machinery
Reference numeral 2 denotes a thin steel plate which has a bell mouth 25 which is a wind tunnel and a mounting flange portion 26 which is mounted on a building or the like. The motor mounting leg 34 fixes the drive motor 3 to the center of the bell mouth 25 so as not to move the stator of the motor. The propeller fan 31 transmits the rotation of the rotor of the motor 3 via the shaft 5 so that the airflow flows in the direction of the arrow.

[0005]

As described above, it is a current technical problem to consider recycling at the time of disposal of a television receiver, but similarly, recycling of ventilation equipment at the time of disposal is also required. Need to be considered.
Some ventilators are subject to disaster prevention regulations, and plastic has been widely used as a material that satisfies conditions such as light weight, high design freedom, and flame retardancy. When plastics contain chlorine and bromine, they suffer from the drawback that when incinerated, they not only generate harmful chemical substances such as dioxins, but also are difficult to recycle as structural materials. Ventilation equipment subject to restrictions on disaster prevention must use materials that meet conditions such as being metallic or flame-retardant, and must be easy to recycle when disposed.

In the structure of the metal fan as shown in FIG. 15, the heavy motor and the mounting legs for supporting the blades are located at the position where the air flow is sucked, which disturbs the air flow and increases the noise. It is necessary to separate the motor mounting legs from the blades, which requires more rigidity, that is, large legs in the axial direction, which makes the device larger, and also makes handling the device more difficult when mounting it on a wall. There was a problem. Further, there is a problem that the blade of a thin steel plate lacks an optimum shape and smoothness due to a problem in strength and a problem in manufacturing such as drawing, so that the performance is poor.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems relating to the recycling of the blower, the handling of the apparatus, the performance, and the like. The purpose is to obtain a blower that can be easily recycled. It is an object of the present invention to obtain a structure and a manufacturing method of a blower having high performance and high reliability. An object of the present invention is to obtain a structure of a blower that can be easily handled by anyone in a thin shape. It is another object of the present invention to reduce costs when dismantling a blower.

[0008]

According to a first aspect of the present invention, there is provided an air blower which is driven by a rotor of a motor to generate an airflow, and a wind which guides the airflow generated by the impeller to form an air path. A blower comprising a path forming means and a motor mounting means mounted on the air path forming means and supporting a stator of a motor, wherein the impeller, the air path forming means and the motor mounting means are formed of metal; Is a molded product obtained by integrally molding a low melting point metal.

According to a second aspect of the present invention, there is provided an air blower driven by a rotor of a motor to generate an air flow;
A wind path forming means for guiding an air flow generated by the impeller to form an air path and supporting a stator of the motor, wherein the rotor is configured such that a rotor rotates outside the stator. The rotor and the impeller are integrally formed by molding a low melting point metal.

According to a third aspect of the present invention, there is provided a blower, comprising: a makeup grill attached to one of an entrance and an exit of an air passage formed by the air passage forming means so as to be able to ventilate the impeller. This is a molded product obtained by integrally molding a melting point metal.

According to a fourth aspect of the present invention, there is provided an air blower having a duct connection port attached to the other side of the air path formed by the air path forming means and capable of passing air through the impeller and the duct. This is a molded product obtained by integrally molding a low melting point metal.

According to a fifth aspect of the present invention, there is provided an air blower which supports a motor and forms an air path by an impeller driven by the motor; A makeup grill that forms one ventilation port, and a connection port that is attached to the ventilation path forming means and forms the other ventilation port of the ventilation path; In addition to being formed as a part, this metal part is formed of a molded article obtained by integrally molding a low melting point metal for each part or a metal part having a higher melting point than the molded article of the low melting point metal.

According to a sixth aspect of the present invention, there is provided a blower that is mounted on an outdoor end of a duct that constitutes an air passage for ventilation, and that prevents wind and rain from entering the duct.
A duct connecting portion fitted into the outdoor opening end of the duct and connected to the duct in a communicating state, and a hood mounted on the duct connecting portion and covering a portion above the outdoor opening of the duct connecting portion, The hood is a molded product obtained by integrally molding a low melting point metal.

According to a seventh aspect of the present invention, there is provided an air blower in which a fastening portion between components made of metal is connected with a low melting point metal.

An air blower according to the invention of claim 8 performs an electrodeposition coating for applying a current to a molded article obtained by integrally molding a low melting point metal to adhere a coating film on the surface.

According to a ninth aspect of the present invention, there is provided an air blower, wherein an oil-repellent material or a water-repellent material is baked on a metal molded product formed of a low melting point metal to cover the surface.

In the blower according to the tenth aspect, the low melting point metal is a light metal or light alloy that can be melted at about 600 ° C., such as magnesium or aluminum.

According to the eleventh aspect of the present invention, there is provided an air blower which is driven by a rotor of a motor to generate an airflow, guides the airflow generated by the impeller to form an air path, and supports a stator of the motor. And a wind path forming means made of metal, wherein the impeller has a built-in motor and is formed of a molded product in which metal is integrally formed.

According to a twelfth aspect of the present invention, there is provided an air blower which guides an air flow generated by an impeller to form an air path, and a metal air path forming means for supporting a stator of a motor includes a wall surface of another device. It has a product mounting part to be attached to an external wall surface such as a house ceiling surface, and the product mounting part can be mounted from both the entrance side and the exit side of the air path.

In the blower according to a thirteenth aspect of the present invention, the air path forming means is arranged on the outer peripheral side of the impeller and guides airflow to form an air path, and supports a motor stator fixed to the wind tunnel. And a motor mounting leg, wherein the motor mounting leg is provided on an air flow outlet side.

According to a fourteenth aspect of the present invention, the product mounting portion of the blower is provided on the motor mounting means so that it can be mounted from both front and back sides and has a thickness in the axial direction.

In the blower according to the present invention, the motor mounting means for supporting the stator of the motor is a molded article integrally formed of a low melting point metal, and the mounting means for integrally storing the storage portion for storing the stored material. It is provided. In the blower according to the invention of claim 16, the impeller is a molded product obtained by integrally molding a low melting point metal, and the wind tunnel is made of a thin steel plate.

According to a seventeenth aspect of the present invention, there is provided a method for manufacturing a blower, comprising the steps of melting and forming a low-melting metal to form a molded article of a blade, and applying an electric current to the molded blade to adhere a coating film to the surface of the blade. The method includes a step of performing a color coating and a step of performing a top coating from the electrodeposition coating.

[0024] A method for dismantling a blower according to the invention of claim 18 is a step of placing the blower, which has been fastened between a plurality of metal parts by means of a low-melting-point metal, into a furnace at a low temperature where the low-melting-point metal melts; Taking out the molten metal and taking out a metal part having a higher melting point than the low melting point metal and keeping its shape, thereby enabling separate collection for each metal part.

In the method for disassembling a blower according to the nineteenth aspect, the fastening means is a metal material having a lower melting point than a steel plate, such as a material containing magnesium or aluminum.

[0026]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiment 1 Next, an embodiment of the present invention will be described with reference to the drawings. 1 and 2 are explanatory views of a ceiling-mounted ventilation fan. Reference numeral 1 denotes a main body frame to which a motor 3, a wind tunnel 2, a decorative grille 3, and a duct connection port 7 are attached. Reference numeral 39 denotes a duct which is disposed on the ceiling part partitioned by the ceiling plate 40 and is fitted to the duct connection port 7 attached to the main body frame 1 to perform ventilation from the suction port 6. The description of the first embodiment relates to a ventilation device that is attached to the back of a ceiling or the like and inhales room air from the ceiling surface side, exhausts the room outside through a duct, and ventilates the room. This ventilator is configured such that an impeller 4 that is rotated by a motor 3 mounted on the main body frame 1 is incorporated into a wind tunnel 2 that is mounted inside a box-shaped main body frame 1 that has an open lower surface. Motor 3
Is mounted on the mounting portion on the top surface of the main body frame 1 with the rotating shaft 5 facing downward, and the impeller 4 is fastened to the rotating shaft 5 by a nut part screwed into a screw portion at the end of the rotating shaft 5. It is mounted and rotated by the motor 3 to form an airflow for ventilation in an air passage formed in the main body frame 1. The air path is configured as a series of passages from the suction port 6 below the main body frame 1 to the duct connection port 7 mounted on the side of the main body frame 1 via the wind tunnel 2, and a duct 39 is provided in the duct connection port 7. Connected.

A makeup grille 8 configured to allow ventilation is suspended from the suction port 6 of the main body frame 1. Metal fittings for hanging and mounting the decorative grille 8 are attached to two opposing positions inside the main body frame 1 by screws, and are long hole-shaped members for engaging the open leg-shaped hanging springs 9 mounted on the decorative grille 8 side. A hole is provided. The entire device attached to the main frame is fixed to a ceiling material or hung from the attic and fixed.
The fork duct is connected to an outdoor vent to allow ventilation.

This ventilator is to be installed in a kitchen or the like subject to laws and regulations on disaster prevention, and all of the main body frame 1, duct connection port 7, impeller 4, wind tunnel 2, and decorative grill 8 are made of a metal material. It is composed of a metal molded product obtained by injection molding a magnesium alloy. Magnesium alloy can be easily molded into complex shapes like plastic by injection molding,
Light weight, high rigidity, and high heat dissipation. It is easier to recycle than plastic, has a melting point of about 600 ° C., and solidifies faster than plastic, and can be molded at high speed. This thixomolding method uses rice granular chips made from a magnesium alloy ingot as a raw material,
In the injection molding apparatus, the molten metal is blown out from a nozzle of the apparatus into a mold for obtaining a gate and a fan shape in a very short time to form the molten metal. If a flat part such as the grill 8 or the wind tunnel 2 is injection-molded by a side gate method in which molten metal is poured from one side of the product shape, the manufacturing apparatus is simplified. When the blade is filled in a ring shape like an impeller, the molding is performed by a direct gate method in which injection molding is performed from the center axis of the hub portion 27 having the center axis of the blade 4. In this case, a plug catcher for storing and cutting off unnecessary plugs is provided at the end opposite to the gate side of the shaft, and an overflow portion is provided at the end of the blade so that molten metal is filled into the product shape to every corner. Stable quality can be obtained by providing or manufacturing the product shape part from other parts. By manufacturing products with complicated shapes such as sirocco fans that connect a large number of blades to the outer periphery of the hub by thixomolding, not only can accurate thin blade shapes be obtained and high performance is obtained, but also caulking etc. There is no protrusion like a mechanical connection part, and noise can be greatly reduced.

The main frame 1, the duct connection port 7, the impeller 4, the wind tunnel 2, and the decorative grill 8 are each made of a metal molded product obtained by injection-molding a magnesium alloy, so that the structural material does not include plastics. A ventilation device having a metal configuration that complies with laws and regulations can be obtained. This ventilation equipment is
And the impeller 4 are lighter than those made of a steel plate, and a process such as a caulking process or a welding process is unnecessary, so that an increase in manufacturing cost can be suppressed. In particular, when the impeller 4 is a multi-blade fan, it takes time and effort to caulk one blade at a time to the side plate when using a steel plate. It can be manufactured in a manufacturing process that hardly changes. In addition, magnesium alloy thixomolding has a small shrinkage and very good dimensional accuracy.

Further, since the magnesium alloy has excellent strength and moldability, it is not necessary to make the cross section of the metal molded product uniform like a plastic molded product. For example, the natural vibration value of the impeller 4 and the body frame 1 is not required. Can be adjusted by taking a free cross-sectional shape at any of those positions. Since the impeller 4 of this ventilator has good heat radiation, the heat of the bearing of the motor 3 can be radiated from the impeller 4 via the rotary shaft 5,
The life of the bearing can be improved. The decorative grill 8 is made of a metal molded product obtained by injection-molding a magnesium alloy, so that it is lightweight and has a high degree of design freedom.
Excellent appearance performance with texture is obtained. In addition, since the duct connection port 7 is formed of a metal molded product obtained by injection-molding a magnesium alloy, the duct connection port 7 is lightweight and has a high degree of freedom in shape. That is, the duct connection port of the sheet metal requires cumbersome deep drawing, and in the case of having a shutter, it is also necessary to form a cumbersome configuration for supporting the pivoting support portion of the shutter, but a magnesium alloy is used. According to injection molding, a shape similar to that of plastic can be easily obtained, and the shutter itself can be formed of a metal molded product obtained by injection molding a lightweight magnesium alloy.

At the time of disposal, the structural material of the main part is all magnesium alloy, and can be reused as magnesium alloy by sorting and heat-treating, and it is easy to recycle. In addition, even when the impeller 4 is a propeller fan type, it can be applied similarly to the multi-blade fan type. In a ventilation device not subject to laws and regulations on disaster prevention, the main body frame 1, the duct connection port 7, the impeller 4, Even if either the wind tunnel 2 or the decorative grille 8 is appropriately formed of a metal molded product obtained by injection-molding a magnesium alloy, it is possible to make use of the above-mentioned characteristics as a structural material of the magnesium alloy.

In the above description, the main material is a metal molded product obtained by injection molding a magnesium alloy. This magnesium has a melting point of 659 ° C. and a density of 1.74 Mg / cubic m. On the other hand, aluminum, which is a representative of light metals, has a melting point of about the same and is much lower than the melting point of iron of about 1500 degrees or more, and has a density of 2.698 Mg / cubic m and a density of 7.8774 Mg / cubic m of iron. Similarly small, strong and lightweight products are obtained. Further, a thixo mold of an aluminum alloy can be manufactured with high precision similarly to magnesium, and a metal product in this blower can be manufactured with aluminum parts. The thixomolding method refers to a semi-melting injection molding method of a low melting point alloy, and a metal injected from an injection molding apparatus into a mold can be produced in an enclosed space without the need for an antioxidant gas. It is possible to form a thin sheet with high precision by changing the liquid phase so as to contain an arbitrary solid according to the application. Necessary strength and weight reduction can be achieved by performing die casting instead of thixomolding on magnesium or aluminum. Therefore, die-cast parts may be used for structural parts such as grills that are thick and do not require much dimensional accuracy, or body frames, bell mouths, which are simply structures using the shape of a metal plate.
It is effective to selectively use metal parts for the duct connection port and the like according to the purpose and cost, such as using inexpensive sheet metal parts such as thin steel plates. In this way, regardless of whether it is subject to legal regulations on disaster prevention, if it is manufactured by combining metal parts with ventilation equipment such as ventilation fans, it is not only easy to recycle, but also plastic from manufacturing to disposal Because it is not used, it is possible to use a blower that is friendly to the global environment.

When moisture resistance conditions are severe such as in a bathroom, the use of an aluminum alloy provides a countermeasure against corrosion as compared with a magnesium alloy and can reduce electric corrosion. In an environment such as a kitchen where corrosion resistance is not so required, a magnesium alloy may be used. Magnesium alloy is a monumental metal, but a passive film is formed and corrosion is suppressed. However, corrosion starts in water or high humidity, so corrosion-resistant coating is performed. As this surface treatment, there is an electrodeposition coating that can be applied to a portion having a complicated structure such as a sirocco fan, which has been difficult to apply by spray coating. Cationic electrodeposition coatings have a basic polar group such as an amino group, and are neutralized with an organic acid to become water-soluble or water-dispersed and become positively charged. When a direct current is passed through the electrode in the paint, the coating component having a positive charge moves toward the cathode, and at the same time, electrolysis of water occurs near the cathode. As a result, the water solubility of the coating material is lost, and a coating film is deposited on the surface of the object to be coated, which is the cathode. Paths of hydrogen gas generated by the electrolysis of water are scattered in the deposited coating film, and an electric current continues to flow through these paths to increase the film thickness. By performing cationic electrodeposition coating with high durability even under such severe corrosive environment, not only good adhesion of the coating film but also uniform coating of the coating on the product causes uneven thickness of the coating. It is possible to keep the rotation balance of the blades in a good state, and it is possible to secure good corrosion resistance and stable quality. The coating can be uniformly applied to the shaft hole due to the electrodeposition coating, and it is possible to prevent electrolytic corrosion due to contact with a different material such as a motor shaft, for example, iron. For coating, first, impurities adhering to the surface are removed by pretreatment, such as degreasing and washing, and then electrodeposition coating is performed, followed by baking and drying. By spray-coating and drying after electrocoating the mechanical structural parts, it is possible to thicken the coating and improve the anticorrosion performance. As a result, a coating film can be formed on a complicated and minute portion, and the thickness of the coating can be increased even in a fastening portion where tightening is performed or strength is increased by coating. Of course, it is natural that spray coating may be performed after the electrodeposition coating is performed on the blades rotated at a low rotation speed irrespective of the balance.

As another method of surface treatment such as painting, water-repellent or oil-repellent treatment may be performed. Water repellency for kitchen use, etc.
An oil repellent treatment may be applied to take measures against corrosion resistance. The water-repellent and oil-repellent treatments can further improve the rotational balance because the treatment film is thinner than the coating. For example, in electrodeposition coating, it is very thin, about 1 μm, compared to about 25 μm. The treatment liquid can be easily treated by flowing the treatment liquid on the blade surface or immersing it in a liquid tank and baking at about 230 ° C. The surface treatment is pre-treated, dried, then immersed in a chemical solution, and baked and dried. By repeating the operation of immersing in this chemical solution and baking and drying, a thick coating film can be reliably applied. Such a surface treatment can be applied to a metal integrally molded product without any problem, but cannot be applied to a sheet metal product requiring a measure for the strength of a caulked portion or a plastic product to which high temperature cannot be applied.
By performing this surface treatment, dirt such as oil is extremely covered, and the ventilation fan used in the kitchen can maintain not only performance but also good appearance for a long period of time. By applying water and oil repellent treatment to major components such as grills and bell mouths other than the blades, not only countermeasures against dirt but also good performance can be maintained by reducing deposits that affect ventilation. It is possible to fulfill the essential role of the blower for a long time without increasing the number of air blowers.

Embodiment 2 The second embodiment shown in FIGS. 3 and 4 has been devised to simplify the configuration of the motor 3 and the impeller 4 of the blower shown in the first embodiment. This is the same as that of the first embodiment. Therefore, the same portions as those of the first embodiment are denoted by the same reference numerals as those of the first embodiment, and the description thereof will be omitted. Reference numeral 10 denotes a rotor of the motor, 11 denotes a stator of the motor, and 12 denotes a rotary yoke that is formed integrally with the impeller 4 and has a built-in motor that is supported by the rotary shaft 5 and rotates.

The impeller 4 of this ventilation device is formed integrally with the rotor 10 of the motor 3 by a metal molding. The motor 3 is of an outer rotor type in which the rotor 10 rotates outside the stator 11, and the rotating shaft 5 is rotatably supported by bearings on the center line of the stator 11, and rotates at the end of the rotating shaft 5. The rotating yoke 12 of the child 10 is fitted at its center. The rotary yoke 12 forms a boss of the impeller 4 and is integrally formed with the impeller 4 by a metal molding obtained by injection-molding a magnesium alloy. Stator 11
Is a stator core as a functional component formed by laminating a plurality of ring-shaped iron cores, a winding 13 wound around the stator core, and an electrical connection between the winding 13 and a motor lead. And a circuit board disposed apart in the stacking direction of the stator core for connection to the stator core. A rotor core (not shown) integrated with the rotating yoke 12 is assembled to the stator core so as to face the stator core with an air gap therebetween, and the motor 3 integrated with the impeller 4 is configured. The impeller 4 may be a multi-blade fan type as shown in FIG. 3 or a propeller fan type. In the case of a multi-blade fan type, the impeller 4 is formed on the mounting flange 15 of the motor 3 of the main plate 14 as shown in FIG. If the insertion hole 17 through which the mounting tool is inserted is formed at a position corresponding to the mounting hole 16, the motor 3 can be easily mounted.

According to this impeller-integrated motor 3,
The number of parts can be reduced, and the manufacturing cost can be reduced. Then, the size in the axial direction can be reduced, and a compact ventilation device can be obtained. Since both the rotating yoke 12 and the impeller 4 are integrally formed of a magnesium alloy, the heat radiation is good, the heat of the bearing can be radiated from the rotating yoke 12 and the impeller 4, and the life of the bearing can be improved. . When the rotating yoke 12 is put into a furnace at about 600 ° C., the magnesium alloy of the rotating yoke 12 and the impeller 4 is melted, and the rotor core having a high melting point remains in the same shape. Therefore, it can be easily separated, and the magnesium alloy and iron can be reused as structural materials. Other functions and advantages are the same as those of the first embodiment. As described above, a low melting point metal such as an aluminum alloy may be used instead of the magnesium alloy.

Embodiment 3 In the third embodiment shown in FIGS. 5 to 7, an outdoor open end of a duct constituting a ventilation system (in many cases, an outdoor open end) is connected to an impeller existing in a room of a blower and a duct to allow an airflow to flow. The present invention relates to a ventilation member as a terminal device of a ventilation system which is attached to a duct and prevents entry of wind and rain from the opening end of the duct. The ventilation member is connected to the duct connection portion 18 by being fitted into the duct in a communication state, and is attached to the duct connection portion 18.
A hood 20 covers the upper side and the side of the outdoor opening 19 of the duct connecting portion 18. The duct connecting portion 18 does not affect the appearance performance, and is formed in a tubular shape from a steel plate of low cost, and has a joining flange 21 at one end. The hood 20 is formed in a hemispherical shape, and its lower side is open. The duct connecting portion 18 is provided with a flange 22 that can be joined so as to be held by the joining flange 21. This food 2
The whole 0 is formed of a metal molded product obtained by injection molding a magnesium alloy. The hood 20 and the duct connecting portion 18 join the flange 22 and the joining flange 21 to form the rivet 2.
It is fixed at 3.

Since the hood 20 is made of a magnesium alloy having good formability and texture, the ventilation device has a high degree of design freedom, a good appearance and a light weight. Then, as shown in FIG. 6, the recycling is performed in the same manner as the rotary yoke 12 shown in the second embodiment.
8 and the hood 20 are put into a furnace at about 600 ° C., the magnesium alloy portion and the iron portion are separated, and each can be reused as a structural material. Since the magnesium alloy has high rigidity, a pin 24 for fixing to the duct connection portion 18 can be integrally formed on the flange 22 of the hood 20 as shown in FIG. 7, thereby reducing the number of parts and improving recyclability. Improvement can be further promoted. Metal devices are effective against the effects of external direct sunlight and cold, that is, against environmental performance. -1 for plastic
Even at a low temperature of about 0 ° C., it is broken or deteriorated by ultraviolet rays of the sun or a fluorescent lamp, but there is no problem even at a low temperature of about −30 ° C., and the material is not deteriorated.

Embodiment 4 FIG. 8 to 12 show examples of the structure of another blower according to the present invention. The upper half from the center line in FIG. 8 is an explanatory view of a state in which the apparatus is attached to a building, and the lower half is a cross-sectional explanatory view of a state in which the apparatus is attached to a steel plate in a built-in manner.
FIG. 9 is another example of a partial sectional view. 10 is an exploded view, FIG. 11 is a front view of FIG. 8, and FIG. 12 is a rear view. The upper half and the lower half illustrate different structures. In FIG. 8, 31 is a propeller fan, 32 is a fan casing forming a bell mouth, 34 is a thin plate steel plate, and a motor 3 is formed.
Are the motor mounting legs for supporting the motor with the stator mounting flange 15; 51 is the wall surface of the steel plate of the mechanical device; and 52 is the wall of a house or the like to which the blower including the propeller fan 31 is mounted by the mounting bolts 41.

Referring to FIG. 8, the propeller fan 31 is
Are integrally formed of a lightweight alloy such as magnesium, including the hub 27 as the boss and the shaft hole portion connected to the shaft 5. The motor 3 is built in the hub 27, and the rotation of the rotor in the motor 3 is transmitted by the coupled shaft 5 to support and rotate the propeller fan 31.
As a configuration of the fixing part, a fan casing 32 which is a sheet metal part made of a thin steel plate which covers the periphery of the propeller fan 31 and guides an air current generated by the rotation of the blades is provided on the wall of the ceiling and side walls in the upper half, and on the lower half in the upper half In the part, for example, it is fixed with bolts 41 via a mounting flange 26 which is a sheet metal part fixed to a fan mounting flange 26 integrally formed on the outside of the fan casing on a wall surface of a mechanical device or the like. The stator outside the motor 3 is similarly fixed to the fan casing by motor mounting legs 34 via the motor stator mounting flange 15 which is a sheet metal part. Naturally, each sheet metal part may be a molded product of a low melting point metal.

FIG. 9 is similar to FIG. 8 except that the motor stator mounting flange 44 is formed by injection molding of a magnesium alloy. FIG. 10 shows an exploded view of the blower of FIG. 8. The fan 31 integrally formed of a low melting point metal has a shaft 5 and a blade fixing nut 3 at a boss portion.
It is connected at 7. The motor 3 is attached to the motor mounting leg 34 with a fixing screw 35 at the flange 15. A motor mounting leg 34 is fixed to a fixed portion where the fan casing 32 and the fan mounting flange are integrated with a mounting screw 36. By disassembling the mounting screws 35, 36, 37 of the respective parts in this way, the components constituting the blower will be in a disjointed state. The mounting screw can be easily disassembled by using a screw rolled or cut from an aluminum alloy and then put into a furnace at a relatively low temperature of about 600 ° C.
The front view of FIG. 11 shows the shape of the blade 28 of the propeller fan 31 and the shape of the fixed part that integrally forms the fan casing 32 having the bell mouth and the mounting flange 26. In the rear view of FIG. 12, a motor mounting leg 34 made of a steel plate is shown in an upper half, and a motor mounting leg 44 of a molded product is shown in a lower half. In the latter case, since the magnesium alloy is injection-molded, the storage portion 42 for storing the storage items such as the lead wire and the capacitor is integrally formed.

This embodiment shows an example of a propeller fan integrally formed of a low melting point metal such as a magnesium alloy. A drive motor can be built inside the blades such as the sirocco fan and the propeller fan in this example, so that the axial dimension can be greatly reduced. By positioning the motor mounting legs on the wind outlet side, the airflow is smoothly absorbed, and even if it is placed close to the fan casing, the suction airflow is not disturbed and the performance is not reduced, and the noise is kept low. As a result, it is possible to obtain a blower that is further thinned as a whole. The fan casing 32 and the motor mounting leg 34 can be close to each other, and the motor 3 and the fan casing 32 having at least half of the axial length inside the fan casing can be connected at the suction-side tip to reduce the overall axial dimension. The position at which the mounting leg supporting the motor supports the motor and the position at which the motor mounting leg is coupled to the fan casing are very close when viewed in the axial direction. In other words, the motor mounting legs that support the load of the motor or fan, or the load due to the vibration or touch of the rotation of the motor or fan, can be formed almost on a flat plate, and by securing rigidity with molded products of lightweight alloys and thin steel plates It is possible to reduce the size of the mounting legs. In addition, since the motor mounting legs have a shape that is abundant and the portion that goes to the ventilation path is long in the axial direction and a thin plate in the front direction, there is almost no obstruction to ventilation in the flow of air flow, that is, even if it is provided in the air path .

As described above, since the fan is made of a lightweight alloy and the motor is built in, the air blower can be significantly reduced in weight and a thin device can be obtained. A configuration that can be easily assembled and disassembled can be obtained. Since the magnesium alloy is excellent in heat transfer, even if the motor 3 is built in the hub 27, the cooling effect of the motor is not lost, and a thin device in which the blade and the motor wrap can be obtained. This heat transfer is equally effective with lightweight alloys such as aluminum. The light weight of the blades and the effect of the wrap are added, so that the axial dimensions of the motor mounting leg and the bell mouth are extremely short as compared with the conventional ventilation fan, so that a very lightweight ventilation fan can be obtained. Furthermore, by using a lightweight alloy for the motor mounting legs, the cooling effect of the motor is further improved and the heat dissipation is improved, and for example, when the magnesium alloy is integrally molded, the cross-sectional shape of the legs can be designed freely, so the blowing performance is improved. It is also possible to integrally form a storage section for storing various parts such as a capacitor and a motor wiring so as not to be hung by ventilation. The capacitor is used for starting the induction motor, improving the power factor, and the like.

As described above, in the present description, the material which simplifies the manufacturing process of the blower is selected, the number of parts is reduced, and even if it is placed in a furnace at about 600 ° C., no matter how dirty the metal is, each metal type can be used. Thus, it is possible to obtain parts and materials that can be easily collected and improved in recyclability. At the time of recycling, after removing the power cord of the motor, the product is put into a furnace at about 600 ° C to melt and recover the magnesium alloy. At this time, if the mounting screws used for the fastening parts other than the blades are made of a low melting point alloy made of the same material as the blades, the bell mouth and the motor made of a steel plate can be separated and collected as parts. The screw at the fastening portion may be a cutting screw, and is dissolved and decomposed in this way, so that a ventilation fan that can be disassembled without being removed even if the screw or the like is fixed to the mounting member due to corrosion or surrounding rust or the like is obtained. In this description, components such as a casing and a filter that cover a fan such as a grill are not described, but it is easy to attach to a fan casing. Although the configuration in which the attachment leg is not provided on the suction side due to the flow of the fork wind has been described, a configuration in which the flow of the wind is reversed may be used because the noise is not a problem in the blower having a low rotation speed. The strength of the motor mounting legs can be improved by using a lightweight alloy molded product.The axial direction can be made thinner in the width direction even if it is the same as a steel plate, and the shape can be made freely, and the capacitor and lead wire storage part can be Although the box-shaped example has been described, it is easy to provide a groove for guiding and fixing the lead wiring and to provide a grill and other mounting portions throughout the longitudinal direction of the leg.

Embodiment 5 FIG. 13 and 14 show examples of the structure of another blower of the present invention. 13 and 14
The upper half from the center line shows the side surface, and the lower half shows a partial sectional explanatory view. FIGS. 13 and 14 show the structure of a ventilation fan using a propeller fan.
Is the same as In the figure, the distance between the mounting surface of the equipment and the heat exchanger 53 is indicated by A and B. The upper half of FIG. 13 shows a state where the blower is fastened to the wall 51 from the motor 3 side, that is, from the outlet side. The lower half is the blade 31 side,
That is, a state in which tightening is performed from the wind suction side is shown.

In the configuration shown in FIG. 14, a drive motor is built in the hub 27 of the blade, and the motor mounting leg 34 is arranged on the side of the air flow outlet, and the blade or the blade and the motor mounting leg are made of magnesium alloy. . The fan casing and the like are sheet metal parts made of a steel plate. However,
In the structure of FIG. 13, the motor mounting leg is provided with both a connection portion to the fan casing 32 such as a bell mouth and a mounting portion for mounting the blower to a wall or a mechanical device. In the case of incorporating devices such as those for vehicles, further reduction in size and weight is required. For this reason, as described above, the motor is built into the blades, and the motor mounting legs are positioned on the side where the wind blows out, making the whole thinner and using parts integrated with lightweight alloy to make it lighter . In the case of the built-in equipment, the mounting wall of the external equipment is generally made of steel plate in many cases, and the mounting hole of the external equipment can correspond to a square hole or a round hole. Therefore, in FIG. As only a necessary suction bell mouth portion, the motor mounting leg 34 and the fan casing 32 are integrally connected, and the motor mounting leg 34 is extended outward so that the motor mounting leg 34 can be mounted on the wall 51. As a result, the shape of the fan casing becomes very simple, the material cost can be reduced, the cost can be reduced, and the weight can be significantly reduced.

As described above, the motor mounting leg is provided with both the mounting joint for the fan casing and the bell mouth and the mounting portion for the product, and the mounting portion 41 for this product can be mounted on the front side or the back side. 13. In FIG. 13, a fan casing made of a thin steel plate is used. Further, the motor mounting leg 34 is also made of a thin steel plate, and has a high strength as a drawn shape. The direction of tightening is designed to be possible from the wind suction side or from the air blow side.
It can be easily removed by disassembly during service inspection.

FIG. 14 shows a metal ventilation fan in which a mounting portion of a product provided on a motor mounting leg is provided with an axial thickness. In this way, a step is provided in the thickness direction, and the blade can be attached even if the suction direction of the blade is reversed. A thick product mounting portion 54 is provided outside the motor mounting leg 44 so that the distance to a blade such as a heat exchanger 53 in an external device incorporated as a result can be set. In FIG. 14, the upper half of the blower has the mounting surface of the motor mounting leg 44 on the wind outlet side aligned with the wall, and the distance to the heat exchanger 53 in the device is A, so that the desired heat exchange characteristics and ventilation characteristics are achieved. can get. In the lower half of FIG. 14, when the dimension A is characteristically inconvenient or an obstacle is present instead of a heat exchanger, the mounting surface of the motor mounting leg 44 on the wind suction side of the blower is adjusted to the wall. . At this time, a gap is generated in the outer peripheral portion between the threaded product mounting portion 54 and the wall 51, but air leakage can be easily prevented by closing with the packing 53.

As shown in FIG. 14, if the space between the blades and the inside is too narrow to allow the wind to flow and the inside temperature rises too much, or if the gap is too small and the noise is large, no additional parts are required. Measures can be taken easily. When an object is placed close to the fan blades, the noise increases rapidly, so that it is practically very useful to be able to adjust the size of the suction side of the fan. As is clear from the description of the above embodiment, the blower of the present invention is lightweight, has metallic properties, can be easily recycled at the time of disposal, and can extend the life of the motor. . In addition, it is thin, has a good appearance, can be manufactured with a reduced number of parts, and can be manufactured at low cost.

[0051]

According to the first aspect of the present invention, it is possible to obtain a blower that is lightweight and has metallic properties and can be easily recycled at the time of disposal.

According to the second aspect of the present invention, the thin and lightweight
A blower that can achieve a reduction in the number of parts and a reduction in manufacturing costs can be obtained.

According to the third aspect of the present invention, it is possible to obtain a blower that is lightweight, has metallic properties, and has excellent appearance performance.

According to the fourth aspect of the present invention, it is possible to obtain a blowing device which is lightweight, has good blowing performance and is easy to manufacture.

According to the fifth aspect of the present invention, there is provided a blower which is lightweight, nonflammable, easy to disassemble, and easy to recycle.

According to the invention of claim 6, it is possible to obtain a durable blower which is lightweight, has good appearance performance and is durable.

According to the seventh aspect of the present invention, a blower which can be easily disassembled and easily recycled can be obtained.

According to the invention of claim 8, a reliable blower having good corrosion resistance can be obtained.

According to the ninth aspect of the present invention, it is possible to obtain a blower having less dirt and good appearance performance.

According to the tenth aspect of the present invention, a blower that is lightweight, has metallic properties, and has low recycling energy can be obtained.

According to the eleventh aspect of the present invention, it is possible to obtain a blower that is lightweight, has metallic properties, and has good recyclability.

According to the twelfth aspect of the present invention, it is possible to obtain a blower which is easy to recycle and has good attachment and decomposability of the product.

According to the thirteenth aspect of the present invention, a blower having excellent blower characteristics and noise characteristics can be obtained.

According to the fourteenth aspect of the present invention, it is possible to obtain a blower having good performance when the device is incorporated.

According to the fifteenth aspect of the present invention, an easy-to-use and practical blower can be obtained.

According to the sixteenth aspect of the present invention, it is possible to obtain a blower that is lightweight and inexpensive at the time of manufacture and disposal.

According to the seventeenth aspect of the present invention, a method for manufacturing a blower that is lightweight and has good corrosion resistance can be obtained.

According to the eighteenth aspect of the present invention, a method for disassembling a ventilation device which can be easily disassembled and easily recycled can be obtained.

According to the nineteenth aspect of the present invention, there is provided a method for disassembling a ventilation device which has a simple disassembling device and is easy to recycle.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating a blower according to a first embodiment.

FIG. 2 is a cross-sectional view illustrating a blower according to the first embodiment in an attached state.

FIG. 3 is a partial cross-sectional side view of a motor portion of a blower according to a second embodiment.

FIG. 4 is a partial cross-sectional side view of another motor portion of the blower according to the second embodiment.

FIG. 5 is an exploded perspective view showing members of the blower according to the third embodiment.

FIG. 6 is an explanatory diagram illustrating an example of a recycling procedure of the blower according to the third embodiment.

FIG. 7 is an exploded perspective view showing another blower of the third embodiment.

FIG. 8 is a partial cross-sectional explanatory view showing a blower according to a fourth embodiment.

FIG. 9 is a partially sectional explanatory view showing another blower of the fourth embodiment.

FIG. 10 is an exploded explanatory view of the blower according to the fourth embodiment.

FIG. 11 is a front view of a blower according to a fourth embodiment.

FIG. 12 is a rear view of the blower according to the fourth embodiment.

FIG. 13 is an explanatory partial cross-sectional view of a blower according to a fifth embodiment.

FIG. 14 is an explanatory partial cross-sectional view of another blower according to the fifth embodiment.

FIG. 15 is a partially sectional explanatory view showing a conventional blower.

[Explanation of symbols]

1 body frame, 2 wind tunnel, 3 motor, 4 impeller, 5 rotating shaft, 6 suction port, 7 duct connection port,
8 makeup grill, 9 suspension spring, 10 rotor,
11 stator, 12 rotor yoke, 13 winding,
14 side plate, 15 motor stator mounting flange,
16 mounting hole, 17 insertion hole, 18 duct connection, 19 outdoor opening, 20 hood, 21 joining flange, 22 flange, 23 joining rivet, 24 pin, 25 bell mouth, 26 product mounting flange, 27 hub, 28 blade , 31
Propeller fan, 32 fan casing, 34
Motor mounting legs, 35, 36 mounting screws, 37 blade fixing screws, 40 ceiling plate, 41 mounting bolts,
42 storage part for lead wire capacitors, etc., 44 molded part of leg, 51 steel plate wall of machine, 52 wall, 53
Heat exchanger.

Continued on the front page (72) Inventor Jiro Fukuyama 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation (72) Inventor Hideaki Miyagawa 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Co., Ltd. Within the company (72) Inventor Jin Kikuchi 2-3-2 Marunouchi, Chiyoda-ku, Tokyo Mitsubishi Electric Corporation

Claims (19)

[Claims] 1. An impeller driven by a rotor of a motor to generate an air flow, an air path forming means for guiding an air flow generated by the impeller to form an air path, and an air path attached to the air path forming means. A motor mounting means for supporting a stator of a motor, wherein the impeller, the air path forming means and the motor mounting means are formed of metal, and at least the impeller is formed by integrally molding a low melting point metal. A blower characterized by being a product. 2. An impeller driven by a rotor of a motor to generate an air flow, and an air path forming means for guiding an air flow generated by the impeller to form an air path and supporting a stator of the motor, Wherein the rotor is configured to rotate outside the stator of the motor, and the rotor and the impeller are integrally formed by molding a low melting point metal. . 3. A decorative grill attached to one of an entrance and an exit of an air path formed by the air path forming means and capable of passing air through an impeller, wherein the decorative grill is a molded article integrally formed of a low melting point metal. The blower according to claim 1 or 2, wherein: 4. A duct connecting port attached to the other side of the air path formed by the air path forming means and allowing ventilation between the impeller and the duct, wherein the duct connecting port is formed by integrally molding a low melting point metal. The blower according to claim 1 or 2, wherein the blower is a product. 5. An air path forming means for supporting a motor and forming an air path by an impeller driven by the motor, and a makeup attached to the air path forming means to form one ventilation opening of the air path. A grill, and a connection port attached to the air path forming means and forming the other ventilation port of the air path;
Wherein the impeller, the air path forming means, the decorative grille and the connection port are formed of metal parts, and the metal parts are formed by integrally molding a low-melting-point metal for each part or a molded article of the low-melting-point metal. A blower, wherein the blower is also formed of a metal part having a high melting point. 6. An impeller driven by a rotor of a motor to generate an air flow, and an air path forming means for guiding an air flow generated by the impeller to form an air path and supporting a stator of the motor, In a duct connected to the wind path forming means and constituting a wind path for ventilation, and a blower that prevents invasion of wind and rain into the duct at the outdoor end of the duct, the duct has an outdoor opening. A hood that is mounted on the duct connection portion that is connected in a communicating state and covers a portion above the outdoor opening of the duct connection portion, wherein the hood is a molded product obtained by integrally molding a low melting point metal. Blow equipment. 7. The blower according to claim 1, wherein a fastening portion between parts made of metal is connected with a low melting point metal. 8. The blower according to claim 1, wherein a current is applied to a molded product obtained by integrally molding the low-melting-point metal to perform an electrodeposition coating for attaching a coating film on the surface. 9. The blower according to claim 1, wherein an oil-repellent material or a water-repellent material is baked on a metal molded product obtained by molding the low melting point metal to cover the surface. 10. The blower according to claim 1, wherein the low melting point metal is a light metal or light alloy that can be melted at about 600 ° C., such as magnesium or aluminum. 11. An impeller driven by a rotor of a motor to generate an airflow, and a metal airflow path for guiding an airflow generated by the impeller to form an air path and supporting a stator of the motor. Means, wherein the impeller is formed of a molded product in which the motor is built-in and metal is integrally formed. 12. A metal air path forming means for guiding an air flow generated by an impeller to form an air path and for supporting a stator of a motor is provided on an external wall surface such as a wall surface of another device or a ceiling surface of a house. 6. A product mounting part to be mounted, wherein the product mounting part can be mounted from both an inlet side and an outlet side of the air path.
A blower according to at least one of the preceding claims. 13. A wind path forming means, which is arranged on an outer peripheral side of the impeller and guides an air flow to form a wind path, a motor mounting leg fixed to the wind tunnel and supporting a stator of a motor,
The blower according to at least one of claims 1 to 5, wherein the motor mounting leg is provided on an airflow outlet side. 14. The product mounting part is provided on a motor mounting means for supporting a stator of the motor so that the product mounting part can be mounted from both front and back sides and has a thickness in an axial direction. 13. A blower according to at least one of claims 12 and 13. 15. A motor mounting means for supporting a stator of the motor is a molded product obtained by integrally molding a low melting point metal,
13. A blower according to at least one of claims 1 to 5, and 11 and 12, wherein a storage portion for storing a storage object is provided integrally with the attachment means. 16. The blower according to at least one of claims 11 to 15, wherein the impeller is a molded product obtained by integrally molding a low melting point metal, and the wind tunnel is made of a thin steel plate. 17. A step of melting and molding a low-melting metal to form a molded article of a blade, a step of conducting electricity by applying electricity to the molded blade and applying a coating film to the surface of the blade, and And a step of performing a top coating from the above. 18. A step of placing a blower having a plurality of metal parts fastened by a low-melting-point metal fastening means in a furnace at a low temperature at which the low-melting-point metal is melted, extracting the molten metal and melting the metal at a lower melting point than the low-melting-point metal Removing a metal part having a high shape while maintaining the shape. 19. The method according to claim 18, wherein the fastening means is a metal material having a lower melting point than a steel plate, such as a material containing magnesium or aluminum.