JPS618532A - Heating cooker with circulation fan - Google Patents

Abstract

PURPOSE:To stabilize the performances of an electric controller and a motor by preventing the temperature from rising in those parts, by constituting a cooker in such a manner that the outdoor air in low temperature is to be sucked into a cooling fan, after it has passed through the electric controller and the driving motor to cool them. CONSTITUTION:An air suction hole 8 possible to suck enough air is provided to the back side of a cooling fan 5 fitted coaxially to the shaft 4 of a motor 6, and the air sucked by the cooling fan 5 is exhausted to the outside of an apparatus passing through a duct which encircles the cooling fan 5 and is connected to an exhaust passage 14 on the side of a combustion chamber. An electric controller 10 and a motor 6 are installed in a space facing to the suction port of the cooling fan, and an air flow is produced so that the outdoor air in low temprerature, getting into the space from outdoor air pores 11 can be sucked into the suction hole 8 of the cooling fan, after the air has passed through the electric controller and the motor part to cool them. With such an arrangement, not only the motor shaft 4 is cooled by the cooling fan 5, but also the temperature in the electric controller and in other devices can be prevented from rising, utilizing the suction effect of the fan.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to a configuration for mounting a motor, an electric control device, etc. in a heating cooker having a circulation fan such as a convection oven, where the entire device reaches a relatively high temperature.

Conventional configurations and their problems When a device such as an oven reaches a relatively high temperature, there are various problems with the mounting position of electrical parts, electrical control devices, etc. in order to maintain and guarantee the safety and performance of the device. Become. Also, various measures are required to lower the temperature.

OBJECTS OF THE INVENTION The present invention solves the above-mentioned conventional problems, and aims to stabilize performance by preventing temperature rises in electric control devices and motors in convection ovens and the like having circulation fans.

Configuration of Xiaomei In order to achieve the above object, the configuration of the present invention is to arrange a roasting chamber and a combustion chamber in front and behind each other, a heat-sealed door l is installed in the front of the roasting chamber, and a combustion chamber is installed in the rear of the roasting chamber. In addition to opening an outlet to introduce fresh hot air from the oven into the roasting chamber, we also installed an inlet in the center.
A circulation fan is then housed to circulate fresh hot air from the combustion chamber into the roasting chamber. A partition wall through which the fan shaft passes is provided on the rear side of the fan, a self-cooling fan for the fan shaft is installed behind the partition wall, and an inflow hole capable of sucking sufficient air is provided on the rear side of the natural cooling fan. The air sucked in by the natural cooling fan is connected to the exhaust passage on the side of the combustion chamber, and a duct surrounding the natural cooling fan is provided so as to be discharged outside the equipment. An electric control device, a motor, etc. are installed in the space where the air is cooled, and after passing through the electric control device, motor, etc., the air flows so that it is sucked into the suction port of a self-cooling fan. This is a configuration that prevents temperature rises in the electrical control section, etc. by placing parts that are sensitive to temperature in this area.
This has the effect of cooling to a sufficiently safe temperature even if the device is close to a high temperature part such as a roasting chamber.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. In Fig. 1, there is a door 12 on the front side of the roasting chamber 1 that is sufficiently sealed against heat, heat, waves, etc., and a fresh hot air outlet 13a on the rear side of the roasting chamber 1. A combustion chamber 2 is provided via a partition wall A13 having a suction hole 13b. A burner 9 is installed in the combustion chamber 2, and the temperature of the roasting chamber 1 is detected to repeatedly start and stop combustion to produce fresh hot air.A circulation fan 3 rotated by a motor 6 is installed in the combustion chamber 2. , the fresh hot air generated in the burner 9 is passed through the partition wall A13 of the roasting chamber 1,
It is discharged through the discharge hole 13a, sucked in through the suction port 13b, and discharged to the outside through the exhaust pipe 14 connected to the outside. A natural cooling fan 5 is attached to the rear side of the combustion chamber 2 coaxially with the motor shaft 4 of the motor 6. A self-cooling fan 5 is attached to the rear side of the partition wall B15 on the rear side of the combustion chamber 2. A passage having a partition wall C7 surrounding the cooling fan 5 and communicating with the exhaust pipe 14 is provided, and the partition wall C7 includes an electric circuit device 10 for controlling combustion of the motor 6.
A storage box 16 is attached to store the storage box, and an outside air suction hole 11 for sucking outside air is provided in a part of the storage box.

The operation of the above configuration will be explained below.

This opening with a circulation fan configured in this way is in contact with the high-temperature roasting chamber 1 and combustion chamber 2, but connects the electric control device 10 and motor 6, which must be maintained at a low temperature, to the air suction port 8 of the self-cooling fan 5. It is attached to a storage box 16 that sucks in external air, cools the necessary parts, and finally joins the combustion exhaust gas and is discharged to the outside together with the combustion exhaust gas.

In this way, in this embodiment, the self-cooling fan 5 not only cools the motor shaft 4, but also uses its suction effect to cool the necessary control parts, etc., so that the combustion chamber, which becomes hot, can be cooled. 2. It is possible to store electrical control parts and devices even near the roasting chamber 1.

Effects of the Invention As described above, according to the present invention, the following effects can be obtained.

(1) The motor shaft is cooled by the self-cooling fan of the motor that circulates hot air, and the temperature of electrical control parts and devices in the passage is prevented from rising by utilizing the inflow of air from the outside.

(2) Since a cooling section can be created even in close proximity to a high temperature section, the equipment can be made more compact.

(3) No separate cooling device is required.

[Brief explanation of the drawing]

The drawing is a side sectional view showing one embodiment of the present invention. 1...Roasting chamber, 2...Combustion chamber, total...
...Circulation fan, 4...Motor shaft, 5...
... Self-cooling fan, 6 ... Motor, 7 ...
...Bulkhead C18...Air suction hole provided in the partition wall, 9...Burner, 10...Electric control device, 11...Outside air of storage box Suction hole, 12...
...Door, 13...Bulkhead A114...
Exhaust pipe, 15... Bulkhead B, 16... Storage box.

Claims (1)

[Claims] (1) A roasting chamber and a combustion chamber are placed in front and behind each other, and an air outlet is opened at the rear of the roasting chamber to introduce fresh hot air from the combustion chamber into the roasting chamber. A partition wall extending to the rear side and passing through the rotating shaft of the fan is provided on the rear side of the circulation fan, a natural cooling fan is provided behind the partition wall on the same axis as the circulation fan, and a partition wall is provided on the rear side of the circulation fan, and a natural cooling fan is provided on the same axis as the circulation fan. A partition wall having an air passage formed with a through hole for sucking in sufficient air is provided, and the air sucked by the self-cooling fan is connected to the outlet of the exhaust passage of the combustion chamber and discharged to the outside, and the circulation fan A driving motor and an electric control device are provided in a space having an enclosure connected to the suction port of the self-cooling fan, and the electric control device and the drive motor are connected to a low temperature part other than the roasting chamber and the combustion chamber. A circulating fan-added heat cooker in which low-temperature outside air passes through a motor, etc. and is then sucked into a self-cooling fan.