JP2001050197A - Air blower for food preparing machine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To ensure a required rustproof effect without forming a casing and the like of a stainless material, reduce radiation of noise, and eliminate a sealing operation for a joining surface by coating inside and outside cases of a casing for forming an air passage with nylon. SOLUTION: When an electric motor 14 is driven, an impeller 30 is rotated, and pressurized air is delivered from a delivery port 22 after the atmosphere is sucked from an intake port 23. A casing 20 is provided with an air passage 21 wound in a spiral shape, and is branched from inside and outside cases 20a, 20b. In this case, both cases 20a, 20b for forming the air passage 21 and an impeller 30 are manufactured by means of welding or casting, and then, their surfaces are coated by nylon. It is thus possible to ensure a required rustproof effect without forming the casing 20 and the like of a stainless material, it is possible to reduce radiation of noise, and it is also possible to dispense with the sealing of a joining surface at the time of assembly.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a blower for a food preparation machine which is used to blow dried air and other foods conveyed by a conveyor, and to lower the foods from the conveyor.

[0002]

2. Description of the Related Art Generally, a blower for a food preparation machine, that is, a blower provided for blowing gas toward food, includes harmful pathogenic bacteria, It is required that rust and other dusts do not enter. Conventionally, a commercially available blower is made by superimposing two halves to form a blower case, in which a steel plate is welded and assembled, or an impeller made by casting cast iron is supported by the blower case. It is attached to the motor shaft, and the air blow case and impeller are painted for rust prevention. However, the paint film is relatively thin. ゝ It is easy to crack when used for a long time.Therefore, in a blower for a food preparation machine, rust is generated on parts that come into contact with the air flowing through the blower, such as the casing and impeller. In order to prevent the occurrence, a stainless steel material which is press-formed and welded and assembled is used.

[0003]

The stainless steel material is about five times as expensive as the iron material, and is inferior in plasticity and poor in weldability to the iron material. Was bad and expensive.

[0004]

SUMMARY OF THE INVENTION The object described above comprises a casing formed by superposing a pair of substantially symmetrical halves on each other, and an impeller housed inside the casing. A suction port is formed at a central portion facing one side of the casing, and a blowout port is provided at an outer peripheral portion and opens in a tangential direction.The impeller is attached to an electric motor supported on the other side of the casing, and the casing is Can be solved by applying a nylon coating to both halves forming In this case, it is preferable that the coating be performed by immersing half of each blower case in a bath of molten nylon resin. Further, the coating may be performed by applying a powdered nylon resin to a preheated half of the blower case and fusing it.

[0005]

[Function] Nylon coating is thicker and softer than the coating, so there is no cracking or peeling due to impact or long-term use. Also, when assembling the casing, the overlapping surface of both halves is Sealed without gaps.

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described based on the illustrated embodiment. In FIGS. 1 and 2, reference numeral 10 denotes a blower for a food preparation machine, which is used for cooling food, blowing out the food itself and diffusing it over a wide range. The basic configuration of the blower 10 is not much different from the conventional configuration.
That is, a dedicated motor 14 specially provided above the mounting base 12 is supported, and the casing 20 is supported by a mounting flange 16 provided on the front surface of the motor 14.

The casing 20 has an air passage 21 wound in a substantially spiral shape. The air passage 21 is formed between a discharge port 22 which opens in a tangential direction and a suction port 23 which opens in the center. Reference numeral 24 denotes a discharge flange welded to the end of the discharge port 22, and reference numeral 25 denotes a suction flange bolted to the suction port 23. The casing 20 is also divided into two parts by the vertical plane on the mounting flange 16 side and the suction flange 25 side, and both are connected to an inner case 20a mounted by bolts 26 and its outer surface. And an outer case 20b.

Reference numeral 30 denotes an impeller mounted on the main shaft 14a of the electric motor 14. The impeller 30 is not much different from the conventional one, and the arc-shaped guide blade 30a extends in the radial direction.
A side plate 30b supporting the guide blade 30a from both sides;
30b. Therefore, when the electric motor 14 rotates, the impeller 30 rotates, and the blower 10
Atmospheric air is sucked in from the outlet, and pressurized air is blown out from the outlet 22.

Here, the inner case 20a and the outer case 20b constituting the air passage 21 and, if necessary, the impeller 30 are manufactured by welding or casting, and then the surfaces thereof are coated with nylon, and assembled. It is attached. The nylon used for the coating is preferably a soft nylon which does not crack due to expansion and contraction of the material to be coated or climatic temperature. Further, if nylon is coated to a relatively large thickness, protection of the material to be coated is ensured, and the inner case 20a and the outer case 2
0b, and the joint surfaces of these cases with the suction flange 25, the discharge flange 24, etc. can be used as seals. The cost can be reduced.

In order to apply nylon coating to the casing 20 and the impeller 30, these materials are preheated to about 100 ° C., immersed in molten nylon, pulled up and dried. Alternatively, after preheating to about 150 ° C., powdered nylon is adhered, and
This is performed by heating to about 00 ° C. to melt and then air-cooling. The temperature for preheating is not limited to this example, and must be set each time depending on the type of nylon resin used for coating.

[0011]

According to the invention of the present application, the material cost can be reduced as compared with the case where the casing is made of stainless steel, and the increase in the cost of the product can be suppressed. Further, since the nylon coating is softer than the coating film, noise is less radiated. Further, no seal is required at the joint surface during assembly. And so on.

[Brief description of the drawings]

FIG. 1 is an external view of a blower manufactured by applying the present invention, with a part thereof broken away.

FIG. 2 is a side view of the blower, partially cut away.

[Explanation of symbols]

 10 Blower 12 Mounting stand 14 Motor 16 Mounting flange 20 Casing 20a Inner case 20b Outer case 21 Air Passage 22 ··· Discharge port 23 ···· Suction port 24 ····· Discharge flange 25 ······ Suction flange 26 ······ Bolt 30 ······· Impeller 30a ···· Guide vane 30b ···・ Side plate

Claims (3)

[Claims] 1. A casing comprising a pair of substantially symmetrical halves overlapped with each other, and an impeller accommodated in the casing. Forming an inlet and an outlet located in the outer peripheral portion and opening tangentially, and attaching the impeller to an electric motor supported on the other side of the casing;
A blower for a food preparation machine, wherein a nylon coating is applied to both halves forming the casing. 2. A blower for a food preparation machine according to claim 1, wherein said coating is performed by immersing half of each blower case in a bath of molten nylon resin. 3. The blower for a food preparation machine according to claim 1, wherein said coating is performed by applying a powdered nylon resin to a preheated blower case half and fusing it.