CN1752456A - Pressure fan structure for centrifugal blower of microwave oven - Google Patents
Pressure fan structure for centrifugal blower of microwave oven Download PDFInfo
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- CN1752456A CN1752456A CN 200410071967 CN200410071967A CN1752456A CN 1752456 A CN1752456 A CN 1752456A CN 200410071967 CN200410071967 CN 200410071967 CN 200410071967 A CN200410071967 A CN 200410071967A CN 1752456 A CN1752456 A CN 1752456A
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Abstract
There is disclosed a fan structure of the centrifugal blower for the microwave oven. It has a main impeller capable of blowing the drawn air to the outside while the air is being drawn to the inside and a secondary impeller disposed on one side of the main impeller capable of drawing air to cool the fan motor. Between the main and the secondary impellers there is a division plate for dividing the main impeller and the secondary impeller. Plurality of fan blades are disposed in the circular direction of the main impeller and the secondary impeller. Because the blade positions of the main impeller and the secondary impeller are upper and lower staggered, the air blew-out from the upside air-vent and downside air-vent separately can't meet.
Description
Technical field
The present invention relates to a kind of microwave oven, particularly relate to a kind of pressure fan structure of centrifugal blower of microwave oven.
Background technique
As everyone knows, thus microwave oven is a kind of household electric appliance that produced microwave and made the microwave irradiation food that produced make food obtain cooking by magnetron.
According to the difference of its purposes, microwave oven can be divided into: the household microwave oven and two types of the commercial microwave oven that is equipped with large-scale or a plurality of magnetrons that are equipped with small-sized magnetron.
Glass rotating disk that can make food with its rotation of general employing in the household microwave oven is so that evenly heated food; Agitation fan that is used for stirring diffusing microwave of general employing in the commercial microwave oven is so that evenly heated food.
Commercial microwave oven mainly is applicable to the Snack Bar that utilization rate is higher and needs the Food Store of cooking food at short notice, so the power of the general household microwave oven of its power ratio is big.
Specify the structure of existing general commercial microwave oven (hereinafter to be referred as microwave oven) below in conjunction with accompanying drawing.Fig. 1 is the structural representation of existing general commercial microwave oven; Fig. 2 is the decomposition texture schematic representation of the pressure fan structure of existing general commercial microwave oven.
As shown in Figure 1, existing general commercial microwave oven comprises: shell, furnace chamber 20 and electric control chamber 30; The front of described furnace chamber 20 is provided with fire door 40.
Described shell forms the outward appearance of microwave oven, also plays the effect of protection furnace chamber 20 simultaneously, and therefore, shell generally just is made with the steel plate with certain intensity.
Described shell is that the center is provided with furnace chamber 20, comprising: cover the end face of furnace chamber 20 and the rear board 17 at the top plate 11 of bi-side, the base plate 13 of protecting the bottom surface of furnace chamber 20, the front panel 15 that forms furnace chamber 20 fronts and protection furnace chamber 20 back sides simultaneously.
Described furnace chamber 20 is spaces of cooking food, constitutes the food after can putting into food and take out the cooking from its front openings by the box body of the rectangular shape of front openings.
The top of described furnace chamber 20 is provided with waveguide, and the effect of waveguide is that the MT Microwave Transmission that magnetron 33 produces is arrived furnace chamber 20 inside.
One side of described waveguide is provided with the synchronous machine that is used for driving agitation fan.
Not only the top of furnace chamber 20 is provided with waveguide, and the below of furnace chamber 20 also is provided with waveguide; Because the upper and lower of furnace chamber 20 is provided with waveguide respectively, so microwave can be simultaneously respectively from irradiation furnace chamber 20 inside, furnace chamber 20 above and belows.
Described electric control chamber 30 is arranged on furnace chamber 2 right sides, and its inside is provided with a plurality of electronic units.
Described electric control chamber 30 inside are provided with: a plurality of electronic units such as transformer 31, magnetron 33, centrifugal blower 35 and capacitor 37.
In described a plurality of electronic unit, transformer 31 and magnetron 33 produce the microwave of irradiation furnace chamber 20 inside.In the process that produces microwave, described electronic unit all can generate heat.Therefore, in the time of cooking food, the temperature in the electric control chamber 30 can raise.
When running of microwave oven, for the electric control chamber 30 that chilling temperature raises, described centrifugal blower 35 constantly sucks outside air.
Described centrifugal blower 35 is to rotate by the inner blowing fan (not shown) of fan electromotor driving to suck air.When blowing fan rotated, outside air constantly flowed into electric control chamber 30 inside, and in this process, leaked-in air makes transformer 31 obtain natural cooling through around the transformer 31.
Described electric control chamber 30 inside are provided with electric control chamber exhaust manifolds 39, more particularly, are provided with electric control chamber exhaust manifolds 39 in a side of described centrifugal blower 35; The effect of described electric control chamber exhaust manifolds 39 is guiding centrifugal blower 35 inhaled airs, makes its magnetron 33 backs of flowing through to the outside discharge of electric control chamber.In addition, be formed with on the described rear board 17 and be used for to the outside relief opening (not shown) of discharging the air in the electric control chamber exhaust manifolds 39 of microwave oven.
Specify the structure of described centrifugal blower 35 below in conjunction with Fig. 2: as shown in Figure 2, described centrifugal blower 35 comprises: body 35a, be separately fixed at body 35a up and down loam cake 35b and lower cover 35c, bottom 35d and the blowing fan 35e of both sides; Described centrifugal blower 35 utilizes analog bracket 35f to be fixed on the wall of electric control chamber 30.
The central position of described loam cake 35b is formed with through hole 35b ', the running shaft of fan electromotor (not shown) is connected with blowing fan 35e, in other words, the running shaft of fan electromotor is inserted in the axis hole of blowing fan 35e by through hole 35b '.In addition, described through hole 35b ' also has the function that can make the top air flow into blowing fan 35e inside.
In addition, the central position of described bottom 35d is formed with intakeport 35d ', and the effect of intakeport 35d ' is guiding below air flow blowing fan 35e.
The assembling of each parts of described centrifugal blower 35 and welding manner are: the two ends up and down that loam cake 35b and lower cover 35c are inserted body 35a respectively, respectively loam cake 35b and lower cover 35c and body 35a are welded together then, described body 35a is interfixed with loam cake 35b and lower cover 35c respectively.Then, behind the below insertion blowing fan 35e of lower cover 35c, utilize screw to be connected and fixed bottom 35d, a centrifugal blower 35 has just been assembled successfully.
Described blowing fan 35e structure comprises: main impeller 35e ', sub-propeller 35e " with demarcation strip 35e .
Described main impeller 35e ' has the effect by the 35d ' of the intakeport on bottom 35d suction air, also has simultaneously to make the inhaled air rotation and the effect of air-supply, and in order to achieve the above object, described main impeller 35e ' is provided with a plurality of flabellums.
Described sub-propeller 35e " effect be to make through hole 35b ' leaked-in air rotation from the loam cake 35b.Described sub-propeller 35e " equally with main impeller 35e ' makes inhaled air rotation and blows.Described sub-propeller 35e " suck the top be positioned at loam cake 35b and be used for the fan electromotor (not shown) ambient air of blowing fan 35e, so can play the effect of cooling fan motor.
Described main impeller 35e ' and sub-propeller 35e " between separate by demarcation strip 35e .
The pressure fan structure of above-mentioned existing general commercial microwave oven has following shortcoming:
Described main impeller 35e ' and sub-propeller 35e " suck air respectively by rotation mode; " inhaled air collision mutually can take place and produces eddy current respectively by main impeller 35e ' and sub-propeller 35e from the above and below, the eddy current that causes like this can produce very big noise, causes user's strong dissatisfaction.
Summary of the invention
Technical problem to be solved by this invention is, overcomes the shortcoming of the pressure fan structure of above-mentioned existing general commercial microwave oven, and a kind of pressure fan structure of the centrifugal blower of microwave oven of noise generated by air flow when preventing the blowing fan rotation is provided.
In order to solve described technical problem, the technical solution used in the present invention is: the pressure fan structure of centrifugal blower of microwave oven of the present invention comprises: the main impeller of when can suck air to the inside inhaled air being blown laterally, a side that is arranged on main impeller can suck air come the sub-propeller of cooling fan motor and be arranged on main impeller and sub-propeller between be used for separating the demarcation strip of main impeller and sub-propeller; Described main impeller is provided with a plurality of flabellums along circumferencial direction; Described sub-propeller is provided with a plurality of flabellums along circumferencial direction; Stagger up and down mutually in the position of the flabellum of described main impeller and the flabellum of sub-propeller.
The flabellum of described main impeller is provided with evenly and at intervals; The flabellum of described sub-propeller is provided with evenly and at intervals.
The flabellum of described sub-propeller is less than the flabellum of main impeller.
The invention has the beneficial effects as follows:
Since the position of the flabellum of the flabellum of described main impeller and sub-propeller stagger mutually up and down, mutual collision can not take place in the air of sending from upside relief opening and downside relief opening respectively, thereby produces noise because of airflow collision can prevent the blowing fan rotation time.
2. produce noise owing to prevent blowing fan when rotation because of airflow collision, the microwave oven that is provided with blowing fan can quietly use under the state.
3. because the noise of microwave oven is little, the product image degree improves, and can improve Consumer's desire to buy.
Description of drawings
Fig. 1 is the structural representation of existing general commercial microwave oven;
Fig. 2 is the decomposition texture schematic representation of the pressure fan structure of existing general commercial microwave oven;
Fig. 3 is the structural representation of the pressure fan structure of centrifugal blower of microwave oven of the present invention.
Among the figure:
100: centrifugal blower 110: blowing fan
110a: upper frame 110b: lower frame
130a: upside flabellum 130a ': upside relief opening
130b: downside flabellum 130b ': downside relief opening
150: demarcation strip 150a: the shaft coupling projection
150b: axis hole 150c: ribs
Embodiment
Below in conjunction with the drawings and specific embodiments the present invention is described in further detail:
Fig. 3 is the structural representation of the pressure fan structure of centrifugal blower of microwave oven of the present invention.
Adopt the microwave oven of the pressure fan structure of centrifugal blower of microwave oven of the present invention to comprise: the furnace chamber of shell, the electric control chamber that is provided with a plurality of electronic units and placement food; The inner and upper of described electric control chamber is provided with centrifugal blower, and the inside of described centrifugal blower is provided with blowing fan 100.
As shown in Figure 3, the blowing fan 100 of centrifugal blower of microwave oven of the present invention forms the cylindrical shape with certain altitude.
Described blowing fan 100 comprises: upper frame 110a, lower frame 110b, main impeller 130a, sub-propeller 130b and demarcation strip 150.
Described lower frame 110b forms around the lower end of blowing fan 100, and forms toroidal.
The underpart of described main impeller 130a is fixed on the inboard of lower frame 110b, and the upper end portion of described main impeller 130a is fixed on the downside of demarcation strip 150.
Described main impeller 130a is provided with a plurality of flabellums along circumferencial direction, is formed with downside relief opening 130a ' between the described flabellum.The flabellum of described main impeller 130a is provided with evenly and at intervals.
The shape of described upper frame 110a is identical with lower frame 110b shape, promptly forms around the upper end of blowing fan 100, and forms toroidal.
The upper end portion of described sub-propeller 130b is fixed on the inboard of upper frame 110a, and the underpart of sub-propeller 130b is fixed on the upper side of demarcation strip 150; Described sub-propeller 130b is provided with a plurality of flabellums along circumferencial direction, is formed with upside relief opening 130b ' between the described flabellum.The flabellum of described sub-propeller 130b is provided with evenly and at intervals.
The flabellum of described sub-propeller 130b is less than the flabellum of main impeller 130a.
Described demarcation strip 150 is discoideus, between main impeller 130a and sub-propeller 130b, main impeller 130a and sub-propeller 130b is separated.
The central position of described demarcation strip 150 is formed with shaft coupling projection 150a projectedly, and the effect of shaft coupling projection 150a is that the running shaft of blowing fan 100 is connected with the running shaft of fan electromotor (not shown); The central position of described shaft coupling projection 150a is formed with the axis hole 150b of the running shaft that is used for inserting fan electromotor; For shaft coupling projection 150a is securely fixed on the upper side of demarcation strip 150, be provided with a plurality of ribs 150c evenly and at intervals on the outer peripheral surface of described shaft coupling projection 150a.
Stagger up and down mutually in the position of the flabellum of the flabellum of described main impeller 130a and sub-propeller 130b, that is to say, the flabellum of described main impeller 130a is not to aim at up and down respectively to be provided with the flabellum of sub-propeller 130b, therefore, from the air of the downside relief opening 130a ' discharge between the flabellum of described main impeller 130a and poor from having the regular hour between the air of the upside relief opening 130b ' discharge between the flabellum of sub-propeller 130b.
Test result and manufacturing process when certainly, the degree that staggers mutually of the flabellum of the flabellum of described main impeller 130a and sub-propeller 130b can be according to design are adjusted.
Blowing fan 100 working process to centrifugal blower of microwave oven of the present invention are illustrated below:
Described blowing fan 100 adopts the synthetic resin material to form, and more particularly, described blowing fan 100 adopts plastic production to form.Therefore, can at first make main impeller 130a with a plurality of flabellums and the mould of sub-propeller 130b, utilize Shooting Technique to make the main impeller 130a and the sub-propeller 130b of blowing fan 100 then; Main impeller 130a, sub-propeller 130b, demarcation strip 150, upper frame 110a and lower frame 110b are assembled, make blowing fan 100.
Certainly, also can make the flabellum of main impeller 130a and the flabellum of sub-propeller 130b separately, and then make main impeller 130a and sub-propeller 130b by assembling or bonding mode by difference.For example, behind the flabellum of independent respectively manufacturing main impeller 130a and the flabellum of sub-propeller 130b, connect on upper frame 110a and lower frame 110b by assembling or bonding mode.
The process that described blowing fan 100 sucks top air and below air is as follows:
After described fan electromotor (not shown) energising started, its running shaft began rotation, and driving blowing fan 100 begins rotation.
When described blowing fan 100 rotates, drive main impeller 130a and sub-propeller 130b and rotate simultaneously.
When described main impeller 130a rotated, the intakeport (not shown) below fan housing sucked the air of below.
During described sub-propeller 130b rotation, suck the air of top,, make fan electromotor obtain natural cooling from the flow through fan electromotor of blowing fan 100 of top inhaled air by the top opening (being the connecting port between fan electromotor and the fan housing) of fan housing.
Blow to described blowing fan 100 by the opening of fan housing from the above and below inhaled air.
The air of sending by described upside relief opening 130b ' and downside relief opening 130a ', because flow along different mutually positions, it is poor to form the regular hour each other, so mutual collision can not take place, therefore, the noise that airflow collision produces in the time of can preventing blowing fan 100 rotations.
Basic fundamental of the present invention design is: the setting of staggering mutually respectively of the flabellum of the flabellum of main impeller 130a and sub-propeller 130b, according to this technical conceive, persons skilled in the art need not to pass through creative work can associate other multiple embodiment.
Claims (3)
1. the pressure fan structure of a centrifugal blower of microwave oven comprises: the main impeller of when can suck air to the inside inhaled air being blown laterally, a side that is arranged on main impeller can suck air come the sub-propeller of cooling fan motor and be arranged on main impeller and sub-propeller between be used for separating the demarcation strip of main impeller and sub-propeller; Described main impeller is provided with a plurality of flabellums along circumferencial direction; Described sub-propeller is provided with a plurality of flabellums along circumferencial direction; It is characterized in that: stagger up and down mutually in the position of the flabellum of the flabellum of described main impeller (130a) and sub-propeller (130b).
2. the pressure fan structure of centrifugal blower of microwave oven according to claim 1, it is characterized in that: the flabellum of described main impeller (130a) is provided with evenly and at intervals; The flabellum of described sub-propeller (130b) is provided with evenly and at intervals.
3. according to the pressure fan structure of claim 1 or 2 described centrifugal blower of microwave oven, it is characterized in that: the flabellum of described sub-propeller (130b) is less than the flabellum of main impeller (130a).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410071967 CN1752456A (en) | 2004-09-20 | 2004-09-20 | Pressure fan structure for centrifugal blower of microwave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410071967 CN1752456A (en) | 2004-09-20 | 2004-09-20 | Pressure fan structure for centrifugal blower of microwave oven |
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| Publication Number | Publication Date |
|---|---|
| CN1752456A true CN1752456A (en) | 2006-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200410071967 Pending CN1752456A (en) | 2004-09-20 | 2004-09-20 | Pressure fan structure for centrifugal blower of microwave oven |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832295B (en) * | 2010-01-18 | 2012-05-02 | 重庆长安汽车股份有限公司 | Blower for automobile air conditioning system |
| CN104676677A (en) * | 2014-12-30 | 2015-06-03 | 广东美的厨房电器制造有限公司 | Microwave oven |
| WO2016107233A1 (en) * | 2014-12-30 | 2016-07-07 | 广东美的厨房电器制造有限公司 | Microwave oven |
| CN107288922A (en) * | 2017-07-13 | 2017-10-24 | 广东美的厨房电器制造有限公司 | Dislocation impeller and range hood used for range hood |
| CN111375497A (en) * | 2019-12-31 | 2020-07-07 | 浙江三联环保科技股份有限公司 | Impeller structure of barrel type separator |
-
2004
- 2004-09-20 CN CN 200410071967 patent/CN1752456A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101832295B (en) * | 2010-01-18 | 2012-05-02 | 重庆长安汽车股份有限公司 | Blower for automobile air conditioning system |
| CN104676677A (en) * | 2014-12-30 | 2015-06-03 | 广东美的厨房电器制造有限公司 | Microwave oven |
| WO2016107233A1 (en) * | 2014-12-30 | 2016-07-07 | 广东美的厨房电器制造有限公司 | Microwave oven |
| US9918358B2 (en) | 2014-12-30 | 2018-03-13 | Guangdong Midea Kitchen Appliances Manufacturing Co., Ltd. | Microwave cooking device |
| CN107288922A (en) * | 2017-07-13 | 2017-10-24 | 广东美的厨房电器制造有限公司 | Dislocation impeller and range hood used for range hood |
| CN111375497A (en) * | 2019-12-31 | 2020-07-07 | 浙江三联环保科技股份有限公司 | Impeller structure of barrel type separator |
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