CN100516542C

CN100516542C - Release preventing structure for radiating fan of microwave oven

Info

Publication number: CN100516542C
Application number: CNB2004100729130A
Authority: CN
Inventors: 申营一
Original assignee: LG Electronics Tianjin Appliances Co Ltd
Current assignee: LG Electronics Tianjin Appliances Co Ltd
Priority date: 2004-11-26
Filing date: 2004-11-26
Publication date: 2009-07-22
Anticipated expiration: 2024-11-26
Also published as: CN1779354A

Abstract

A disengagement-proof structure of a cooling fan for the microwave oven comprises a starting motor on the roof of the electric control chamber, a cooling fan combined in the rotary shaft of the starting motor for cooling the microwave oven and a cut-off ring combined in the rotary shaft of the starting motor next to the front end surface of the cooling fan. In the invention, the cut-off ring and the propelling nut are combined in the rotary shaft of the starting motor to support the top and bottom parts of the cooling fan separately.

Description

Radiating fan of microwave oven prevent to break away from structure

Technical field

The invention relates to the invention of radiation fan, particularly for the radiation fan that prevents to be provided with plumbness in the process that starts, break away from from actuating motor, and the disengaging of the radiating fan of microwave oven of design prevents structure.

Background technique

In general, in the start-up course of microwave oven, at the inner water vapour that produces the high temperature that from food, volatilizees of cooking room.If this water vapour can not in time exclude, and remain in the words of cooking room inside always, produce stink or allow bacterial reproduction in cooking room inside easily, when causing cooking room inside not keep clean, this peculiar smell just permeates the inside of the food of the cooking afterwards, has reduced taste of food.

And, in electric control chamber, also being provided with and producing high-frequency magnetron and apply high-tension high-tension transformer to magnetron, this magnetron and high-tension transformer are producing very high heat in gastronomical process.This magnetron and high-tension transformer rise to high temperature to the inside temperature of electric control chamber, bring bad influence for the electrical installations that is arranged on electric control chamber inside.

Therefore, possessing sink in the existing microwave oven in addition, this sink sucks after the outside air, makes it to circulate in cooking room inside, cooling electric control chamber when from then on removing moisture.

As shown in Figure 1, existing sink 1 is to possess with lower member to form, that is, radiation fan 10, it is to electric control chamber 1 internal feed outside air; Actuating motor 20, it is used for starting radiation fan 10; Delivery outlet 1a, it is located at a side of electric control chamber 1 wall, allows the air that is drawn into electric control chamber 10 inside export cooking room 2 to; Exhaust port 2a, it allows the inner air that outputs to cooking room 2 inside be discharged to the outside.

Radiation fan 10 is that brute force is pressed on the running shaft 21 of actuating motor 20, and actuating motor 21 begins to start, and the radiation fan 10 that is combined in actuating motor 20 running shafts 21 just begins rotation, simultaneously air outside is drawn into the inside of electric control chamber 1.The air that is drawn into just circulates and simultaneously air outside is drawn into the inside of electric control chamber 1 in the electric control chamber 1.When the air that is drawn into just circulates electric control chamber 1 inside, carry out heat exchange, finally pass through delivery outlet 1a, be discharged to the outside by exhaust port 2a with the moisture that is created in cooking room 2 inside with magnetron and high-tension transformer 50.

Radiation fan 10 is to be installed on the running shaft 21 of actuating motor 20, such mounting type is the structure that is provided with from the radiation fan 10 that is arranged on high temperature electric control chamber 1 inside, if the temperature of electric control chamber 1 rises, the part that combines with running shaft 21, just under the effect of high heat, expand, increased the danger that breaks away from.

In order to prevent this phenomenon, in the running shaft 21 of radiation fan 10 and actuating motor 20, along running shaft 21 sense of rotation of actuating motor 20 and each self-forming of opposite direction connecting thread, come in conjunction with radiation fan 10 and actuating motor 20.But, in this case, radiation fan 10 is installed on after the running shaft 21 of actuating motor 20, must rotate several times, assembling process is numerous and diverse.

Summary of the invention

The present invention is in order to solve above-mentioned existing in prior technology problem, what its purpose was to provide a kind of radiating fan of microwave oven prevents to break away from structure, with improve radiation fan and actuating motor be connected tightness the time, simplify the assembling process of radiation fan.

To achieve these goals, what the invention provides a kind of radiating fan of microwave oven prevents to break away from structure, include the actuating motor that is arranged on the electric control chamber top board and be combined in the radiation fan of the electric control chamber of the cooled microwave stove on the actuating motor running shaft, wherein: be combined with on the running shaft of actuating motor by ring, and be close on the front-end face of radiation fan, end from the running shaft of actuating motor, the bottom of being close to radiation fan is provided with pusher nut, the described loop contacts of ending is provided with the connecting groove of installing by ring with running shaft outer circumferential face contact position on the running shaft outer circumferential face of actuating motor.

Effect of the present invention is that this radiating fan of microwave oven prevents to break away from the structure, is combined in the running shaft of actuating motor the upper and lower of each self-supporting radiation fan by ring and pusher nut.Therefore, come the radiation fan of combination and the Placement between the actuating motor to compare, improved its intensity with existing powerful mounting type.And the ring that ends of the present invention is compared with the mode of the also easy peace fan of pusher nut, is more convenient for the assembling process of radiation fan.

Description of drawings

Fig. 1 be in the existing microwave oven radiation fan phase diagram is set;

Fig. 2 is arranged on radiation fan in the existing microwave oven and the bonding state between the actuating motor;

Fig. 3 is that radiation fan is arranged on phase diagram in the actuating motor in the microwave oven of the present invention;

Fig. 4 is the front elevation and the profile of the pusher nut of the present invention;

Fig. 5 of the present inventionly is incorporated into the sectional drawing of actuating motor running shaft state by ring and pusher nut.

Among the figure:

10: radiation fan 20: actuating motor

21: running shaft 21a: connecting groove

30: by encircling 40: pusher nut

Embodiment

Describe the present invention more in detail according to drawings and Examples below.

Therefore, when describing embodiments of the invention in detail, use identical symbol for identical formation structure with reference to accompanying drawing, and, improve its definition, unduplicated different part mainly is described.

Radiation fan among the present invention is the electric control chamber for the cooled microwave stove, and be set in parallel in the top board of electric control chamber to the inner supply outside air easily of electric control chamber, therefore, radiation fan is under the effect of deadweight, is in the direction that breaks away from from the running shaft of actuating motor all the time.

As shown in Figure 3, prevent that according to radiating fan of microwave oven of the present invention breaking away from structure is to comprise by ring 30 and pusher nut 40 and constituting, they are installed on the running shaft 21 of actuating motor 20 separately in order to support the upper and lower of radiation fan 10.

By ring 30 is that radiation fan 10 is inserted in running shaft 21 connection before of actuating motor 20, thisly form by elastic material by ring 30, therefore have certain elastic force, be stuck in the outer circumferential face that is close to running shaft 21 in the outer circumferential face of running shaft 21 simultaneously.And this formation with " C " word shape by ring 30 is best, like this, can snap in into easily from the outside of running shaft 21.

If be provided with as above-mentioned structure form by the ring 30, just end in the front end of radiation fan 10 by ring 30, that is, end in the front end that inserts the radiation fan 10 of coming in from the running shaft 21 of actuating motor 20, restriction radiation fan 10 enters more than the certain distance to running shaft 21.Therefore, radiation fan 10 is fixed on certain position always.

With in the outer circumferential face of the running shaft 21 that encircles 30 actuating motors that contact 20, be preferably formed as connecting groove 21a, that is, be used for installing connecting groove 21a by ring 30.So be provided with, make by ring 30 and just can not move in the inside of connecting groove 21a, then more stable is fixed in the running shaft 21.

As shown in Figure 4, the central authorities of pusher nut 40 also are provided with the central groove that is used for by running shaft 21.Also possessing the ring-like portion of being close to 41 in the inboard of this central groove, this portion 41 of being close to forms along central groove, and in the insertion process of running shaft 21, the outer circumferential face of elasticity supporting rotating shaft 21.

Being close to portion 41 is directions of passing through towards running shaft 21, and the shape that internal diameter is progressively narrow forms, that is, the internal diameter of its end is narrower and small than the external diameter of running shaft 21.In being close to portion 41, the direction of passing through along running shaft 21, a plurality of cut 41a have been formed, this cut 41a snaps in the process of running shaft 21 at pusher nut 40, when stretching down than the effect of the running shaft 21 of being close to portion's 41 bigger external diameters, under the effect of elastic force of self, tightly be attached to the outer circumferential face of running shaft 21.

As shown in Figure 5, the pusher nut 40 that forms as above-mentioned structure is, in order to prevent that under the effect of ring 30 radiation fan 10 that restriction is entered can not break away to fall from running shaft 21, from the end of the running shaft 21 of actuating motor 20, be close to the bottom of filling in radiation fan 10.

The identical direction of direction that the portion of being close to 41 of above-mentioned pusher nut 40 passes through because of its fore-end and running shaft 21 forms, so effectively support radiation fan 10, promptly, radiation fan 10 is the effects that are subjected to himself gravity in the opposite direction of the side that enters with running shaft 21, therefore, in order to prevent that radiation fan 10 can not break away from, and is supported by pusher nut 40 from running shaft 21.

And the bottom of radiation fan 10 is to be pushed into the formula nut to support that therefore, though the electric control chamber temperature inside rises, radiation fan 10 can not break away from from running shaft 21.

The present invention illustrates and illustrates according to certain embodiments, but is not limited to this, transformation that can be various and change structure of the present invention, and this also is must be included among the patent claim of the present invention.

Claims

1, a kind of radiating fan of microwave oven prevent to break away from structure, include the actuating motor that is arranged on the electric control chamber top board and be combined in the radiation fan of the electric control chamber of the cooled microwave stove on the actuating motor running shaft, it is characterized in that:

Be combined with on the running shaft (21) of actuating motor (20) by ring (30), and be close on the front-end face of radiation fan (10), end from the running shaft (21) of actuating motor (20), the bottom of being close to radiation fan (10) is provided with pusher nut (40), described by encircling (30) contact on running shaft (21) outer circumferential face of actuating motor (20), be provided with the connecting groove of installing by ring (30) (21a) with running shaft (21) outer circumferential face contact position.