JP2003050033A - Range hood fan - Google Patents

Abstract

(57) An object of the present invention is to provide a range hood fan that can effectively and effectively prevent the occurrence of condensation on the surface of a current plate and keep the cooking area clean. A range hood fan of the present invention has a blower in a main casing. This blower 1
The rectifying means 14 is provided in the hood 13 of the main body casing 11 at intervals so as to cover the five suction ports 16. The rectifying means 14 has a flat heat insulating structure and prevents condensation on the outer surface of the rectifying means 14.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a range hood fan having a blower therein, and more particularly to a range hood fan that prevents dew condensation on the surface of a current plate.

[0002]

2. Description of the Related Art Generally, this type of range hood fan is disclosed in Japanese Patent No. 2508901 and Japanese Patent Laid-Open No. 2001-41.
It is configured as described in Japanese Patent Publication No. 81, and is configured to efficiently capture combustion gas, oil fumes and steam generated in cooking and discharge the air outdoors by a blower.

Recently, induction heating heaters (IHs) have been used for the purpose of preventing the occurrence of fires in gas cookers of gas stoves and gas stoves.
Induction cookers using heaters are becoming popular.

However, it has been found that when an electromagnetic cooker is used as a cooking utensil, dew condensation occurs on the current plate of the range hood fan, and the generated dew condensation gradually grows and drops into droplets. .

The problem of dew condensation of the range hood fan does not occur in the case of the gas stove. In the gas stove, the high-temperature combustion gas generated by the combustion of the fuel gas is guided by the straightening vane 2 of the range hood fan 1 to be guided into the main body casing (hood main body) 3 as shown in FIG. 10, and from the suction port 5 of the blower 4. It is designed to be sucked. The combustion gas and steam sucked by the blower 4 are continuously blown from the blower 4,
It is designed to be discharged from the discharge port 6 to the outside.

At that time, the current plate 2 of the range hood fan 1
The air guided to the suction port 5 of the straightening vane 2 is heated by the combustion gas and is warmed. Therefore, the straightening plate 2
A large temperature difference did not occur between the surface temperature of the above and the back surface temperature of the back side, and it was possible to effectively prevent the occurrence of dew condensation on the rectifying plate 2, and no dew condensation problem occurred.

However, when an electromagnetic cooker equipped with an induction heater is used, the ambient temperature hardly rises due to cooking by the electromagnetic cooker. Therefore, although the lower surface (surface) of the current plate 2 is warmed by the steam generated from the cooking pot,
The air flowing on the back side of the straightening vane 2 does not rise in temperature so much and is cold.

[0008]

When cooking with an electromagnetic cooker in the winter or during cooling operation of an air conditioner, rising steam generated from a pot or a medicine can comes into contact with the surface (lower surface) of the current plate 2 to cause dew condensation. However, there is a problem that when the dew condensation gradually grows, it drops into droplets. If the generated dew drops as water drops or the like, the kitchen will be polluted and the cleanliness will be impaired.

The present invention has been made in consideration of the above-mentioned circumstances, and a range hood fan capable of preventing dew condensation on the surface of the current plate and effectively preventing the dew condensation and keeping the kitchen clean. The purpose is to provide.

Another object of the present invention is to provide a range hood fan which is excellent in safety and can be cleaned easily and smoothly.

Another object of the present invention is to provide a range hood fan in which the structure for attaching the rectifying plate is simplified to improve the marketability, and the attaching / detaching property of the rectifying plate and the degree of freedom thereof are improved.

[0012]

A range hood fan according to the present invention has the following features to attain the object mentioned above.
As described in, has a blower in the main body casing,
In the range hood fan in which the rectifying means is provided in the hood of the main body casing at intervals so as to cover the suction port of the blower, the rectifying means has a flat heat insulating structure.

In order to solve the above-mentioned problems, in the range hood fan according to the present invention, as described in claim 2, the rectifying means has a heat insulating space layer formed therein. As described in claim 3, the rectification means forms a heat insulating space layer between the plate-shaped lower rectifying member and the upper rectifying member by combining the members.
The lower rectifying member is formed of a non-combustible material, and at least one of the rectifying members is formed in a box shape having an opening on one side. Further, as described in claim 4, the upper rectifying member and the lower rectifying member are formed. The side rectifying member is
It is formed in a box shape with one surface opened, and is integrally configured by combining the openings so that they face each other.

Further, in order to solve the above-mentioned problems,
As described in claim 5, in the range hood fan according to the present invention, when the upper rectifying member and the lower rectifying member are combined, at least the peripheral rising portion of the rectifying member located outside is formed by drawing. Is something
Further, as described in claim 6, the rectifying means is one in which a heat insulating material is provided in a heat insulating space layer between the upper rectifying member and the lower rectifying member to be combined, and further, the rectifying means according to claim 7. As described above, the rectifying means has the lateral space portion in the circumferential direction between the peripheral rising portion of the upper rectifying member and the peripheral rising portion of the lower rectifying member, and the heat insulating material is provided in the lateral space portion. Further, as described in claim 8, the rectifying means is such that the upper rectifying member is provided with an engaging attachment means to the main body casing.

Further, in order to solve the above-mentioned problems, in the range hood fan according to the present invention, as described in claim 9, the rectifying means covers the outer surface of the flat heat insulating structure with an oil-repellent film. It is what was carried out, Furthermore, Claim 10
13. The rectifying means is provided with a heat insulating material on the upper surface of the rectifying member, as described in the above item.
As described above, in the rectifying means, the rectifying member is formed of a heat insulating material. Further, as described in claim 12, the flat heat insulating structure of the rectifying means has a flat lower surface, The upper surface is formed in a concave shape with a depressed central portion.

[0016]

BEST MODE FOR CARRYING OUT THE INVENTION An embodiment of a range hood fan according to the present invention will be described with reference to the accompanying drawings.

FIG. 1 is an overall view of an embodiment of a range hood fan according to the present invention as seen obliquely upward from below, and reference numeral 10 indicates a range hood fan. The range hood fan 10 has, for example, a main body casing 11 as a box-shaped range main body, and an operation button 12 for operating the operation of the range hood fan 10 is provided on the front surface of the main body casing 11. A hood 13 is provided on the lower surface of the main body casing 11, and the rectifying plate 1 is attached to the hood 13.
4 is detachably attached as a rectifying means at intervals. The straightening vane 14 is formed in a flat heat insulating structure,
4 between the hood 13 and the hood 13 and the blower 1
The suction flow path 17 reaching the suction port 16 of No. 5 is formed. The air flow is guided along the suction passage 17.

The blower 15 is housed in the main body casing 11 of the range hood fan 10. The blower 15 has an electric motor 18 and blower blades 19 such as sirocco blades driven by the motor, and is covered with a fan casing 20.
The suction port 16 of the blower 15 is a bell mouth 22 of the hood 13.
There is an opening in the part.

On the other hand, a straightening vane 14 is attached so as to be exposed on the lower side of the range hood fan 10, and the straightening vane 14 is an air layer having a flat heat insulating structure in the shape of a flat rectangular box. The heat insulating space layer 23 is formed. The current plate 14 may be formed in various arbitrary shapes other than the rectangular shape according to the shape of the lower surface of the range hood fan 10.

The current plate 14 is made of a stainless material such as metal.
It is formed of a ceramic material such as an incombustible material. At least the front surface and the back surface of the rectifying plate 14, at least the front surface, are preferably coated with an oil repellent material such as silicon or a fluororesin material, and a resin coating is applied. This is for cleaning the current plate 14 smoothly and smoothly.

As shown in FIGS. 3 and 4, the flow straightening plate 14 has a plate-shaped upper flow straightening member 24 and a lower flow straightening member 25 formed to have substantially the same size, and the upper flow straightening member 24 and the lower flow straightening member 25 are formed. A peripheral rising portion 26 is formed on the outer periphery of the sheet by drawing by sheet metal pressing, and the sheet is drawn into a lid shape. When the outer peripheral portions of the upper flow straightening member 24 and the lower flow straightening member 25 are narrowed by drawing, an R portion is formed at the corner of the peripheral rising portion 26, so that a sharp bent portion is not formed and safety is improved. In addition, the appearance shape is excellent, and the marketability can be improved.

The outer peripheral portions of the upper flow straightening member 24 and the lower flow straightening member 25 may be formed by bending. However, when both members 24 and 25 are formed by bending, sharp corners are formed at the outer peripheral corners, so care must be taken during cleaning. The upper rectifying member 24 and the lower rectifying member 25 are formed by the rising portions 26 into a flat box shape having an opening on one surface.

The upper rectifying member 24 and the lower rectifying member 25 having the peripheral rising portion 26 on the outer peripheral portion are formed to have substantially the same size, and are integrally formed into a flat box shape by press fitting and fitting. The two rectifying members 24, 25 are firmly joined by shrink fitting, which is a fastening by friction joining. The rectifying members 24 and 25 may be coupled by welding, etc., or by rivets, etc., instead of press-fitting by shrink fitting or the like. Both rectifying members 24, 2
In any case, 5 is fastened and integrated to form a straightening plate 14
Is assembled.

As shown in FIGS. 3 and 4, the upper straightening member 24 of the straightening plate 14 has hook-shaped hook fittings 2.
8 and lock claw-shaped hooking metal fittings 29 are provided as a plurality of engaging attachment means, for example, two pieces at four corners. At that time, since the current plate 14 is formed in a flat box shape and the heat insulating space layer 23 is formed inside, the metal fittings 28,
29 can be screwed and fixed to the upper flow straightening member 24, the mounting structure is simplified, and the appearance shape is also good. The upper surface and the lower surface of the current plate 14 are formed into a substantially flat shape. In addition, the upper surface of the straightening vane 14, specifically, the upper straightening member 24
You may form a small hole (small hole) in the upper surface of. A plurality of small holes may be formed.

Next, the operation of the range hood fan 10 will be described.

When the range hood fan 10 is manufactured, the current plate 14 is detachably attached to the lower portion of the main body casing 11 serving as the hood main body by using the hook metal fitting 28 and the hook metal fitting 29.

At least the lower rectifying member 25 of the rectifying plate 14 is made of an incombustible material.
And the peripheral rising portions 26, 26 of the upper rectifying member 24 are opposed to each other and combined to form a flat heat insulating structure. The upper rectifying member 24 and the lower rectifying member 25 form a peripheral rising portion 26 by preferably drawing the outer peripheral portions thereof, while the upper rectifying member 24 and the lower rectifying member 25 have a resin coating of an oil repellent material on their surfaces. Is given. This resin coating is a straightening plate 14
After forming, the straightening plate 14 may be applied to the outer surface.

Then, the upper flow straightening member 24 and the lower flow straightening member 25 are fitted with each other by shrink fitting such that the rising portions periphery 26, 26 are opposed to each other, and the flat box (disk) shaped straightening plate 14 is integrally assembled. A hook metal fitting 28 and a hook metal fitting 29 are attached to the upper flow rectifying member 24 of the assembled flow rectifying plate 14, and the rectifier plate 14 is attached to the hood 13 with a space using the hook metal fitting 28 and the hook metal fitting 29. .

By mounting the current plate 14 on the hood 13,
A suction flow path 17 is formed from the periphery of the current plate 14 to the suction port 16 of the blower 15. The suction port of the blower 15 is formed by the bell mouth 22 of the hood 13, and the suction passage 17
The airflow guided to the blower 15 is smoothly sucked into the blower 15 from below.

In this way, the range hood fan 10 shown in FIGS. 1 and 2 is assembled and manufactured. The manufactured range hood fan 10 is installed in kitchens such as homes and shops.

Installed range hood fan 10
Is operated by energizing the blower 15 and driving the motor. By the operation of the blower 15, air is sucked into the suction passage 17 from the periphery of the straightening vane 14. Suction channel 1
The air flow sucked into 7 is the bell mouth 22 of the hood 13.
And is sucked into the blower 15 through the suction port 16. The air flow sucked into the blower 15 from below is subsequently blown outward in the radial direction, guided by the fan casing 20, and discharged from the discharge port 30 to the outside. Outlet 30
An exhaust hood (not shown) is connected to and is discharged to the outside.

In this range hood fan 10,
Due to the rotation drive of the blower 15, the air in the room is moved to the hood 13.
The bell mouth 22 is introduced from a suction flow path 17 formed between the flow regulating plate 14 and the flow regulating plate 14, and is sucked into the blower 15 from below.
The blower 15 that has been sucked in has its blowing direction changed, is guided by the fan casing 20, and is discharged to the outside through the discharge port 30.

At that time, the steam and oil smoke produced by the induction heating action of the induction heater rise as an upward flow due to the cooking by the electromagnetic cooker, and rise to contact the lower surface (surface) of the straightening vane 14.

However, even if the rising flow of water vapor or oily smoke collides with the surface of the straightening vane 14 and comes into contact with it, since the straightening vane 14 has a flat heat insulating structure, dew condensation does not occur on the surface of the straightening vane 14. Can be accurately and surely prevented. In this case, since the heat insulating space layer 23 is formed inside the straightening vane 14, it is not affected by the temperature of the air discharged through the suction passage 17 to the outside.

Further, even if the tempura oil is ignited by mistake during cooking with the electromagnetic cooker, the straightening vane 14 is not adversely affected. In the rectifying plate 14, since the peripheral rising portions 26, 26 of the upper rectifying member 24 and the lower rectifying member 25 are covered with the hood 13 from above, it is effective to expose the joint portion of the peripheral rising portions 26, 26 to the outside. Therefore, the appearance shape can be improved. Moreover, each rectifying member 24,
By forming the peripheral rising portions 26, 26 of 25 by drawing, an R portion is formed in the peripheral corner portion. Therefore, even if the corner portion of the flow regulating plate 14 is touched by a hand during cleaning, no injury is caused, the cleaning work can be efficiently and smoothly performed, and the safety can be further improved.

By coating the outer surface of the straightening vane 14, at least the surface thereof, with an oil-repellent material such as silicon resin or fluororesin, an oil-repellent / water-repellent coating can be applied to the surface of the straightening vane 14 for cleaning work. The workability is improved, and the work can be simplified and streamlined.

In the range hood fan 10, the peripheral rising portions 26, 26 are provided on the outer peripheral portions of the upper side rectifying member 24 and the lower side rectifying member 25 which form the rectifying plate 14.
However, it is not always necessary to form the rising portion 26 on one of the rectifying members 24 or 25 and on the other rectifying member (for example, the upper rectifying member 24). ) Next, another embodiment of the range hood fan according to the present invention will be described with reference to FIGS.

FIG. 5 shows a range hood fan according to a second embodiment of the present invention, and shows a sectional structure of a current plate 14A provided in the range hood fan. This straightening plate 1
Other configurations except 4A are not different from those of the range hood fan 10 shown in FIGS. 1 and 2, and are not shown.

The rectifying plate 14A has a technique of forming a flat heat insulating structure by combining the plate-like upper rectifying member 24 and the lower rectifying member 25 in common with the rectifying plate 14 shown in FIGS. The straightening vane 14A is formed by filling a flat heat insulating air layer formed in both the straightening members 24 and 25 with a heat insulating material 32. As the heat insulating material 32, there is glass wool or a closed cell heat insulating material such as urethane foam or styrene foam.

By providing the heat insulating material 32 in the heat insulating air layer between the two flow rectifying members 24 and 25, it is possible to more reliably and effectively prevent the dew condensation on the surface of the flow rectifying plate 25 as compared with the case where only the air layer is provided.

FIG. 6 shows a first modification of the current plate 14B provided in the range hood fan according to the present invention. The other structure is the same as that shown in FIGS. 1 and 2, and thus the description thereof is omitted.

The straightening vane 14B is formed in a flat box shape having an open upper surface, in which a peripheral rising portion 26 is formed by drawing the peripheral portion of the plate-shaped lower straightening member 25. Further, the heat insulating material 33 is provided in the space layer 23 formed in the box of the lower side rectifying member 25.
A plurality of hook-shaped hook metal fittings 28 are attached to one side of the peripheral rising portion 26 of the current plate 14B by welding or the like, and hook metal fittings 29 are attached to the side edges of the peripheral rising portion 26 that follow this side. The rectifying plate 14B is fixed to the hood 13 of the main body casing 11 by the hook metal fitting 28 and the hook metal fitting 29 attached to the rectifying plate 14B (see FIG. 2).
It is detachably attached to. The current plate 14B itself may be formed of a nonflammable heat insulating material such as a ceramic material. In this case no other insulating material need be provided.

In this rectifying plate 14B, if the heat insulating material 33 is placed on the upper surface of the lower rectifying member 25, the cleanability of the surface on the heat insulating material 33 side deteriorates, but dew condensation adheres to the lower surface (surface) of the rectifying plate 14B. Since it is possible to solve the above problem, it is possible to obtain the same function and effect as the rectifying plate 14 according to the embodiment with respect to the prevention of dew condensation.

FIG. 7 shows a second modification of the current plate. The rectifying plate 14C shown in this modified example is formed such that the upper rectifying member 34 and the lower rectifying member 35 have different sizes and shapes.

Similar to the lower flow straightening member 35, the upper flow straightening member 34 of the flow straightening plate 14C is formed into a flat box shape in which the peripheral rising portions 36, 36 are formed by narrowing the peripheral portion by drawing or the like, and one surface is opened. It Upper rectifying member 34
Is formed in a size smaller than the lower rectifying member 35 by one turn, and both rectifying members 34, 35 are integrated by combining the rising portions 36, 36 so as to face each other.

When both flow straightening members 34 and 35 are combined and integrally joined, a flat heat insulating air layer 37 is formed inside the flow straightening plate 14C, while a lateral space portion 38 is formed in the peripheral direction in the circumferential direction. Then, the heat insulating material 39 is provided in the lateral space portion 38. The lateral space portion 38 is formed between the rising portion 36 of the lower straightening member 35 and the rising portion 36 of the upper straightening member 34.

According to the flat heat insulating structure of the rectifying plate 14C, it is possible to prevent dew condensation on the surface (lower surface) of the rectifying plate, while it is possible to effectively form dew condensation on the side wall which is the rising portion 36 of the rectifying plate 14C. It can be prevented. The overall configuration of the range hood fan excluding the baffle plate 14C does not differ from that shown in the first embodiment, and therefore its description is omitted.

8 and 9 show a third modification of the current plate.

The straightening vane 14D shown in this modification has a structure in which a heat insulating space layer 43 having a flat heat insulating structure is formed between the upper straightening member 40 and the lower straightening member 41, and the straightening vane of the first embodiment is used. It is common with 14.

In this straightening plate 14D, the central portion of the plate-shaped upper straightening member 40 is provided in a concave shape to form a concave shape, while the lower straightening member 41 is formed in a flat shape. The upper flow straightening member 40 is formed in a concave shape that is inclined downward toward the center, and removes oil and water droplets attached to the blower 15, the hood 13, and the flow straightening plate 14D of the range hood fan 10 shown in FIGS. 1 and 2. It has a structure that prevents leakage. The rectifying plate 14D is used for the blower 15 and the hood 13.
Oil and water droplets attached to the upper rectifying member 4 of the rectifying plate 14D
It is configured to collect near the center of 0.

The other structure and operation are the same as those of the range hood fan shown in FIGS. 1 and 2, and the description thereof will be omitted. Reference numeral 44 is a peripheral rising portion of the upper flow straightening member 40, and 45 is a peripheral rising portion of the lower flow straightening member 41.

Although the range hood fan is not provided with a filter in the embodiment of the present invention, it is a matter of course that this range hood fan may also be provided with a filter on the suction side of the blower. In this case, the filter may be provided in the suction passage of the air flow and provided in the bell mouth portion of the hood 13.

[0053]

In the range hood fan according to the present invention, it is possible to effectively and effectively prevent dew condensation on the surface of the rectifying means (rectifying plate) even if it is cooked by the electromagnetic cooker. It is possible to reliably prevent the kitchen from becoming dirty and maintain a clean feeling.

Further, in this range hood fan, the rectifying means is constituted by the flat heat insulating structure, and the rectifying plate can be easily and easily attached to and detached from the main body casing. Moreover, since it is made of the nonflammable material, there is a risk of flame. There is no need to improve safety.

Further, it is possible to smoothly machine the corner portion of the peripheral rising portion of the upper side rectifying member or the lower side rectifying member constituting the range hood fan, and there is no sharp edge portion to improve the mechanical and physical strength. At the same time, it is possible to prevent damage that may cause injury during cleaning.

Furthermore, by coating the surface of the current plate with the oil-repellent material, the cleaning work can be efficiently performed in a short time, the appearance can be improved, and the commercial property can be improved.

[Brief description of drawings]

FIG. 1 is an overall view showing an embodiment of a range hood fan according to the present invention.

FIG. 2 is a schematic cross-sectional view of the range hood fan shown in FIG.

FIG. 3 is a cross-sectional view showing a current plate provided in the range hood fan.

FIG. 4 is an exploded perspective view of the current plate.

FIG. 5 shows a second embodiment of the range hood fan according to the present invention, and is a cross-sectional view of a current plate provided in the range hood fan.

FIG. 6 is a cross-sectional view showing a first modified example of the current plate provided in the range hood fan according to the present invention.

FIG. 7 is a cross-sectional view showing a second modified example of the current plate provided in the range hood fan according to the present invention.

FIG. 8 is a perspective view showing a third modified example of the current plate provided in the range hood fan according to the present invention.

9 is a sectional view taken along line IX-IX in FIG.

FIG. 10 is a sectional view showing a conventional range hood fan.

[Explanation of symbols]

10 Range Hood Fan 11 Body casing (hood body) 13 Hood 14 Rectifier plate (rectifier means) 15 blower 16 Suction port 17 Suction channel 18 electric motor 19 Blower blade 20 fan casing 22 Bellmouth 23 Insulated air layer 24, 34, 40 Upper rectifying member 25, 35, 41 Lower rectifying member 26,36 Rise 28 Hooks (engagement attachment means) 29 Hooks (engagement attachment means) 30 outlet 32, 33, 39 insulation 37,43 Adiabatic air layer 38 Lateral space

Claims (12)

[Claims] 1. A range hood fan having a blower inside the main body casing, wherein the rectifying means is provided in the hood of the main body casing at intervals so as to cover the suction port of the blower, and the rectifying means has a flat heat insulation structure. A range hood fan characterized by being configured. 2. The range hood fan according to claim 1, wherein the rectifying means has a heat insulating space layer formed therein. 3. The rectifying means includes a plate-shaped lower rectifying member and an upper rectifying member which are combined to form a heat insulating space layer between the members. The lower rectifying member is made of an incombustible material, and at least 2. The range hood fan according to claim 1, wherein one of the straightening members is formed in a box shape with one surface opened. 4. The upper rectifying member and the lower rectifying member are formed in a box shape with one surface open, and
The range hood fan according to claim 3, wherein the openings are opposed to each other and are integrally formed. 5. The range according to claim 3 or 4, wherein, when the upper flow rectifying member and the lower flow rectifying member are combined, at least the peripheral rising portion of the flow rectifying member located outside is formed by drawing. Food fan. 6. The range hood fan according to claim 3, wherein the rectifying means is provided with a heat insulating material in a heat insulating space layer between the upper rectifying member and the lower rectifying member to be combined. 7. The rectifying means includes a lateral space portion in the circumferential direction between a peripheral rising portion of the upper rectifying member and a peripheral rising portion of the lower rectifying member, and a heat insulating material is provided in the lateral space portion. The range hood fan according to claim 4, wherein 8. The range hood fan according to claim 3, wherein said rectifying means has an upper rectifying member provided with an attaching means for engaging with the main body casing. 9. The rectifying means is characterized in that an outer surface of the flat heat insulating structure is coated with an oil repellent film.
The listed range hood fan. 10. The range hood fan according to claim 1, wherein the rectifying means has a heat insulating material provided on an upper surface of the rectifying member. 11. The range hood fan according to claim 1, wherein said rectifying means has a rectifying member made of a heat insulating material. 12. The range hood fan according to claim 1, wherein the flat heat insulating structure of the rectifying means has a lower surface formed in a flat shape and an upper surface formed in a concave shape having a depressed central portion.