CN1213059A

CN1213059A - Microwave oven having stirrer and tray which are driven by single motor

Info

Publication number: CN1213059A
Application number: CN98105569A
Authority: CN
Inventors: 李性浩; 明顺焕; 许政义
Original assignee: Samsung Electronics Co Ltd
Current assignee: Samsung Electronics Co Ltd
Priority date: 1997-09-29
Filing date: 1998-03-13
Publication date: 1999-04-07
Also published as: GB9804038D0; GB2329814A; JPH11111447A; KR19990030202A

Abstract

The invention provides a microwave oven, wherein the stirrer and the tray are drived by a same motor. In a microwave oven, a tray is disposed on the bottom face of a cooking chamber to place food, and a stirrer is disposed at the lower portion of the tray so as to disperse a microwave. The turning force of a motor is respectively transferred to the stirrer and the tray by first and second gear portions. The stirrer and the tray are mutually turned in the opposite directions, thus, the uper and lower part of the food can be uniformly heated. In addition, because the stirrer and the tray are drived by a same motor, it has a simple structure and lower cost. The stirrer and the tray can also be turned in the same direction at different speeds mutually.

Description

Have by the agitator of single-motor driving and the micro-wave oven of pallet

The present invention relates to a kind of micro-wave oven, more particularly, relate to a kind of the have agitator that drives by single-motor and the micro-wave oven of pallet.

Micro-wave oven is the device that comes cooking food with microwave, and as shown in Figure 1 to Figure 3, it comprises: a housing 1 wherein comprises a magnetron (not shown); One cooking room 3 is formed in the housing 1; One pallet 37 is installed in the cooking room 3, and food just is placed on above it; With one 5, be used for opening/closing cooking room 3.The microwave that produces from magnetron emits to the cooking room 3, is placed on food on the pallet 37 by heating using microwave.

Pallet 37 is supported by a plurality of rotary rollers 21.Roller 21 is supported by a support ring 22.

One motor be installed in cooking room 3 base plate 4 below.Base plate 4, one couplings 13 that the turning cylinder 11 of motor 10 passes cooking room 3 are connected to the top of turning cylinder 11.

Coupling 13 is formed with a plurality of along its radially-protruding hook-type flange 36, and the flange 39 that is formed on the pallet 37 is hooked by hook-type flange 36.Coupling 13 and pallet 37 cooperatively interact by the cooperation of the tooth between hook-type flange 36 and the flange 39, so they are fixed relative to one another along its rotation direction.

When launched microwave, pallet 37 is by revolution.Like this, can prevent that microwave from concentrating on certain part of food, thus even heat food.

Simultaneously, micro-wave oven is furnished with an agitator (stirrer) (not shown), is used for disperseing to be transmitted into the microwave of cooking room 3.Agitator is to be made by material that can microwave reflection, and it has a plurality of wings.In addition, agitator generally is installed in the top of cooking room 3, and rotates in the micro-wave oven operating process.The microwave that produces from magnetron imports cooking room 3 by a waveguide, and microwave was stirred device before being transmitted into cooking room 3 disperses.Therefore, the microwave of dispersion is transmitted on the food equably, thus even heat food.

In traditional micro-wave oven that has this agitator, because agitator is mounted in the top of cooking room 3, microwave can be transmitted into the top that is placed on the food on the pallet 37 equably, yet it can not be transmitted into the bottom of food equably.

In order to overcome this problem, a micro-wave oven is provided, be distributed to the food bottom equably in order to make microwave, its agitator is placed on below the pallet 37.Japanese patent application No.1990-111987 (publication number No.1992-12493) provide this micro-wave oven.

Yet, in this conventional microwave oven that agitator is placed on below the pallet 37, because need two motors come driving tray 37 and agitator respectively, so, complex structure, manufacturing cost increases.Specifically, in the described in front Japanese patent application, because the motor of driving tray is installed in the upside of cooking room, in order to be connected with motor, also need the bar of a plurality of support pallets in addition, the area of putting food on the pallet is limited by support bar.

The present invention has overcome the problems referred to above of prior art, therefore, an object of the present invention is to provide a kind of micro-wave oven, and it can be equably to the lower transmission microwave that is placed on the food on the pallet, and particularly, it can come driving tray and agitator with a single-motor.

To achieve these goals, the invention provides a kind of micro-wave oven, it comprises: a pallet, and it is installed in the bottom of cooking room, needs the food of the cooking to be placed on this pallet; One agitator, it is installed in below the pallet, is used for disperseing to be transmitted into the microwave of cooking room; One motor is used for sun Rotary tray and agitator; One first teeth parts are used for the moment of torsion to agitator transmission motor; One second teeth parts are used for the moment of torsion to pallet transmission motor; With two turning cylinders, they are rotated by first and second teeth parts respectively, are respectively applied for rotating mixer and pallet.

Here, two turning cylinders are to be rotated by speed that differs from one another or opposite directions by first and second teeth parts, and wherein, the speed of rotating mixer cans be compared to the speed height of Rotary tray most.Two rotating shaft coaxial arrangement.

In addition, be formed with a depression that is used to hold agitator in cooking room bottom, a cap member is installed in the upside of depression, drains in the depression to prevent food and foul.

Connection with figures by following detailed description, just can be understood the present invention better, and its various purposes and advantage will be more obvious.In the accompanying drawing:

Fig. 1 is the perspective view of a common microwave stove;

Fig. 2 is the partial sectional view of Fig. 1;

Fig. 3 is the decomposition diagram of Fig. 2;

Fig. 4 A is the fragmentary side cross-sectional view of micro-wave oven of the present invention;

Fig. 4 B is the partial enlarged drawing of Fig. 4 A;

Fig. 5 is the partial, exploded perspective view of Fig. 4 A;

Fig. 6 is the perspective view by the agitator of motor sub-assembly driving shown in Figure 5; With

Fig. 7 is the perspective view of motor sub-assembly in another embodiment of the present invention

Below with reference to the accompanying drawings, introduce the present invention.

Fig. 4 A is the fragmentary side cross-sectional view of micro-wave oven of the present invention; And Fig. 4 B is the partial enlarged drawing of Fig. 4 A.

One pallet 87 is installed on the base plate 54 of a cooking room, and an agitator 90 is installed in below the pallet 87.Form a depression 56 on the base plate 54 of cooking room, agitator 90 is contained among the depression 56.

Pallet 87 is supported by a plurality of rollers 71, so it can rotate.Roller 71 is supported by a support ring 72.At the downside of pallet 87, two guiding ribs 82 are arranged, they are formed at the circumferential of pallet 87, are used to roller 71 guiding.

Below cooking room base plate 54, a motor sub-assembly 100 that is used for Rotary tray 87 and agitator 90 is installed.As shown in Figure 5, motor sub-assembly 100 comprises: a motor 168, one first gear parts 144; One second gear parts 1 54; One travelling gear part 142 is used for the rotatory force of motor 168 is passed to first and second gear parts 144,150; With two turning

cylinder

186a, 186b, they are rotated by first and second gear parts 144,154.

Motor 168 comprises: a motor seat 152; A connector 162, it is fixed on a side of motor seat 152; One stator 164, it is contained in the motor seat 152; With a rotor 166.Connector 162 is connected with external power source, and it provides CD-ROM drive motor 168 required electric power.When motor provides power supply, stator 164 rotary rotors 166.Top at the rotating shaft 166a of rotor 166 is equipped with a driven wheel 172, is used to drive travelling gear part 142.

Upside at motor 1 68 is equipped with a substrate 170, and its core has a hole, travelling gear part 142, the first and second gear parts 144,154 and rotating

shaft

182a, and 186a is fixed on the substrate 170.

Travelling gear part 142 comprises: a bottom gear 142a, and its diameter is big; One idler gear 142b, its diameter is little, a upper gear 142c, its diameter is between the diameter of the diameter of undergear 142a and idler gear 142b.Driven wheel 172 engagements of undergear 142a and rotor 166, upper gear 142c and idler gear 142b mesh with first gear parts 144 and second gear parts 154 respectively.

First gear parts 144 comprises a gear wheel and a pinion.The upper gear 142c engagement of gear wheel and travelling gear 142.The rotatory force of travelling gear 142 is transmitted by first gear parts 144, and it has reduced the rotating speed of travelling gear.

Second gear parts 154 comprises four gears 146,148,150 and 152.Each gear in the middle of them all is made of a gear wheel in large diameter and a small diameter gear.Gear 146,148,150 and 152 by a gear gear wheel and the pinion of another gear between the tooth engagement be connected to each other.The rotatory force of travelling gear part 142 is transmitted by the gear 146,148,150 and 152 of second gear parts 154 respectively, and they have reduced the rotating speed of travelling gear.

Turning

cylinder

182a and 186a are made of one first turning cylinder 182a and one second turning cylinder part 186a.The first turning cylinder 182a and the second turning cylinder 186a are coaxial and put.Be formed with on the first turning cylinder 182a on one first gear, 182, the second turning cylinder 186a and be formed with one second gear 186.The pinion of first gear 182 and first gear parts 144, the pinion of the tail gear of second gear 186 and second gear parts 154.The first and second turning

cylinder

182a and 186a rotate by opposite directions by first gear parts 142 and second gear parts 154.

A upper board 150 is stamped on the top of turning

cylinder

182a and 186a, and there is a hole 150a intermediate portion.Turning

cylinder

182a and 186a pass the end 54 of hole 150a and cooking room, wherein, and the first turning cylinder 182a and agitator 90 assemblings, second turning cylinder, 1 86a and pallet 87 assemblings.

One coupling 63 is connected the upper end of the second turning cylinder 186a.Be formed with a plurality of hook-type flanges 86 on the coupling 63, it hooks the flange 89 that is formed on the pallet 87.Coupling 63 and pallet 87 cooperatively interact, so they can relative fixed along its rotation direction.

One cover piece 95 is placed on the depression 56, is used for preventing that food or foul from draining to depression 56.The groove 96 that is used to adorn cover piece 95 at the upside of depression 56 along its circumferencial direction formation one.Cover piece 95 is preferably made by transparent material.

As shown in Figure 6, agitator 90 comprises a plate portion 91 and a plurality of wing 94 that extends along plate portion 91 radial outward.When agitator 90 rotated, the microwave that emits in the cooking room was disperseed by wing 94.The microwave that disperses emits to the bottom of pallet 87, so the bottom that is placed on the food on the pallet 87 is evenly heated.

To introduce the operation of micro-wave oven of the present invention below.

When a user was placed in food on the pallet 87 and operates micro-wave oven, magnetron produced microwave and comes cooking food.At this moment, pallet 87 and agitator 90 are rotated by motor 168.

More particularly, when when motor 168 provides power supply, rotor 166 rotates, so driven wheel 172 is rotated.According to the rotation of driven wheel 172, travelling gear 142 rotates, and the moment of torsion of travelling gear 142 is delivered on the first and second turning cylinder 182a and the 186a by first gear parts 144 and second gear parts 154.So turning

cylinder

182a and 186a also are rotated.At this moment, the rotation direction of turning

cylinder

182a and 186a is opposite each other.In other words, if travelling gear 142 is moved in the direction of the clock by rotor 172, then the first turning cylinder 182a is rotated by first gear parts 144 (it is a single gear) clockwise direction; The second turning cylinder 186a is rotated counter clockwise by second gear parts 154 (it comprises the even number gear).

Along with turning cylinder 182a with 186a is rotated and the agitator 90 and the pallet 87 of turning

cylinder

182a and 186a assembling separately also are rotated.Agitator 90 and pallet 87 rotate by opposite directions.So, by Rotary tray 87 microwave is emitted on the food that is placed on the pallet 87 equably, and the agitator 90 by rotating for 87 times at pallet makes microwave emit to the bottom of food equably.In addition, because agitator 90 and pallet 87 are driven by a motor 168, so simple in structure, manufacturing cost has also reduced.

In the process of cooking food, cover piece 95 prevents that food or foul from draining in the agitator 90.In addition, if cover piece 95 is made by a transparent material, the user can observe whether normal running of agitator.

In embodiment shown in Figure 6,, also can rotate turning

cylinder

182a and 182b, but the speed difference realizes purpose of the present invention at Fig. 4 by equidirectional although turning

cylinder

182a and 186a rotate by direction opposite each other.

Just, as shown in Figure 7, the second gear parts 154a is by

odd number gear

146a, and 148a and 150a form, so the rotation direction of the second turning cylinder 186b is identical with the rotation direction of the first turning cylinder 182b that is driven by the first gear parts 144a (it is a single gear).At this moment, the velocity of rotation of turning

cylinder

182b and 186b is different.Turning

cylinder

182b and 186a velocity of rotation separately can be controlled by changing the formation first and second gear parts 144a and the number of gears of 154a and the number of teeth of each gear.

As shown in Figure 7, the rotating speed of rotating ratio second turning cylinder 1 86b of the best first turning cylinder 182b is fast, so agitator 90 changes soon than pallet 87.Because on the pallet 87 food is housed, pallet 87 takes a turn for the better most, and agitator changes hurry up, to improve the effect of dispersion microwave.

As mentioned above, the invention provides a kind of micro-wave oven, it can be to the upper and lower that is placed on the food on pallet radiated microwaves equably.Particularly, because pallet and agitator are to be driven by a motor, so microwave oven structure has been simplified, manufacturing cost has also reduced.

Although illustrated and described in detail the present invention, must be clear that they only are examples rather than circumscribed, spirit of the present invention and category are determined by appended every claim.

Claims

1. micro-wave oven comprises:

One pallet, it is installed in the bottom of cooking room, and food to be cooked can be placed on the above-mentioned pallet;

One agitator, it is installed in below the above-mentioned pallet, and above-mentioned agitator is used for the microwave of scattered radiation to above-mentioned cooking room;

One motor is used for rotating simultaneously above-mentioned pallet and above-mentioned agitator;

One first teeth parts are used for the moment of torsion to above-mentioned agitator transmission said motor; With

One second teeth parts are used for the moment of torsion to above-mentioned pallet transmission said motor; With

Two turning cylinders, they are rotated by above-mentioned first and second teeth parts respectively, and above-mentioned turning cylinder is respectively applied for and rotates above-mentioned agitator and above-mentioned pallet.

2. micro-wave oven as claimed in claim 1, wherein, above-mentioned turning cylinder is rotated with the speed that differs from one another by above-mentioned first and second teeth parts.

3. micro-wave oven as claimed in claim 2, wherein, the velocity of rotation of above-mentioned agitator is faster than above-mentioned pallet.

4. micro-wave oven as claimed in claim 1, wherein, above-mentioned turning cylinder is rotated by opposite directions by first and second teeth parts.

5. micro-wave oven as claimed in claim 1, wherein, above-mentioned turning cylinder coaxial arrangement.

6. micro-wave oven as claimed in claim 1 wherein, forms a depression in the bottom of above-mentioned cooking room, is used to hold above-mentioned agitator, at the upside of above-mentioned depression one cover piece is installed, and drains in the above-mentioned depression in order to prevent food and foul.