CN100343584C - Microwave oven grate heater apparatus - Google Patents
Microwave oven grate heater apparatus Download PDFInfo
- Publication number
- CN100343584C CN100343584C CNB031048684A CN03104868A CN100343584C CN 100343584 C CN100343584 C CN 100343584C CN B031048684 A CNB031048684 A CN B031048684A CN 03104868 A CN03104868 A CN 03104868A CN 100343584 C CN100343584 C CN 100343584C
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- heater
- cover
- microwave
- oven
- cavity
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Abstract
The present invention discloses a grid heating device for a microwave oven, which comprises a heater cover and a grid heater, wherein the heater cover forms an oven opening towards the inside of a cavity of a microwave oven and is fixed on a top plate of the cavity; the grid heater is arranged in the heater cover and is exposed in an oven to heat food; the heater cover is integral times as wide as the 1/2 wavelength (lambda) of the microwaves irradiating the inside of the oven; the center of the grid heater is in a position where the heater cover is integral times as wide as the 1/4 wavelength of the microwaves, in the width direction of the heater cover. The present invention has the effect that by the grid heating device for a microwave oven, the quantity of microwaves irradiating hot wires can be smallest so that the heater is prevented from being damaged. Because the heater cover and a cavity plate are formed into a whole, the components and the parts of the present invention can be reduced so that the installation of the heater is simplified. Thus, production cost can be reduced, and production efficiency can be improved.
Description
Technical field
The invention relates to micro-wave oven, particularly about preventing that microwave from concentrating on the micro-wave oven grill heater device on the hot line of heater.
Background technology
Micro-wave oven is to produce microwave by electric current, and with the device of microwave irradiation heat food to the food.Micro-wave oven in the past only adopts microwave is offered baking oven, shines the mode of heat food on the food.Therefore recently because of this mode only possesses single heat characteristic, built-in heater in the micro-wave oven of producing uses as another heating source with it.
The heater that uses as auxiliary heating source comprises that heat that the convection action of utilizing air produces heater delivers to the convection type heater of heat food in the baking oven and the hot line that heater produces is shone the grill heater of heat food on the food.
The microwav eoven heater mounting structure in the past with grid function that is installed on the housing top board is described.
Fig. 1 represents in the past the microwave oven of heater as auxiliary heating source use.As figure, possessed the baking oven 2 of cooking in the inside of cavity assembly 1, and be provided with electronic room 3 in the side of cavity assembly 1.Shell 7 surrounds the outward appearance that cavity assembly 1 forms the top and two sides of micro-wave oven.For make baking oven 2 optionally with exterior, on the front panel 1 that forms the cavity front, be provided with fire door 8.In the front of micro-wave oven, described fire door 8 occupies most area.Food is placed on the food dish 10 of baking oven 2 central authorities, and when the food disc spins, the heater 9 above the baking oven 2 shines heat food on the food with heat.
Fig. 2 represents heater assembly mounting structure plane in the past; Fig. 3 is a side view; Fig. 4 represents the decomposition view of heater assembly mounting structure in the past.
Among Fig. 2, heater 30 is installed in the cover of heater 22 on the cavity top board 24, has possessed the function of grid heater.Described heater 30 can be arranged on inside cavity also can be arranged to transportable structure in the inside of baking oven 2.
On top board, formed the dimetric through-hole section 26 that heater assembly 20 is installed.The heater assembly 20 that is arranged on the through-hole section 26 comprises cover of heater 22 and is arranged on the interior heater 30 of cover of heater.Described cover of heater 22 is hexahedrons of an end opening.Be provided with heater 30 in the inside of cover of heater 22, heater 30 is exposed at the inside of baking oven by the peristome of cover of heater 22 when heater assembly 20 is arranged on the top board 24.
Periphery along the through-hole section 26 that cover of heater 22 is set has formed outstanding laterally flange 27.Cover bracket 28 forms a side of described cover of heater 22.Be arranged on and formed the pair of holes 22a that uses when heater is installed, 28a on the cover bracket 28 of cover of heater 22 opposite sides.
Among Fig. 4, a pair of heater 30 has be arranged in parallel in the inside of cover of heater 22.One end of described a pair of heater 30 utilizes screw 34 to be connected with carriage 32.On the terminal of heater 30 and carriage, formed the pilot hole 36,37 of rigging screw.Simultaneously, the opposite side of heater 30 formed link to each other with the electric power loop of outside at the outstanding node 38 of the vertical section of heater 30.
Below, describe to the installation process of microwav eoven heater assembly and with the process that heater assembly is installed in cavity with above structure.
The side end of the described heater 30 that a pair of length is identical is inserted among the hole 22a that the side of cover of heater 22 forms.Behind the screw mounting hole 36 of the screw mounting hole 37 of the lateral surface of cover of heater 22 alignment carriage 32 and each heater 30, load onto screw 34.
After being placed on the cover bracket 28 by the hole 28a that forms on the cover bracket 28 a pair of node 38 of described heater 30 opposite sides, cover bracket 28 is installed on the cover of heater 22.At this moment, heater 30 utilizes the lead (not shown) that is arranged on cover bracket 28 outsides to be connected with the electric power loop of outside.
Described heater assembly 20 was arranged on the upside of the through-hole section 26 that forms on the top board before cavity is installed.Through-hole section 26 peripheries along top board 24 have formed the otch (not shown), the flange 27 of cover of heater 22 is placed the crooked seaming in back fix or utilize screw to fix.
But the defective that in the past technology exists is that heater 30 is exposed at baking oven 2 inside, and the microwave that therefore shines baking oven inside when using microwave to cook can focus on the hot line of heater and damage heater.Particularly this phenomenon is more serious when using microheater or quartz heater.
Summary of the invention
The purpose of this invention is to provide and prevent that microwave from focusing on the micro-wave oven grill heater device on the hot line of heater.
In order to achieve the above object, the present invention designs a kind of micro-wave oven grill heater device, the grill heater of this device is arranged in the cover of heater of microwave oven cavity top board, cover of heater and cavity top board form one, protrude in the upside of cavity top board, its lower end is provided with the hatch frame that the baking oven interior with being located at microwave oven cavity communicates, wherein: the width of described cover of heater is the integral multiple that shines in 1/2 (λ) of the microwave wavelength of baking oven inside, and the distance two sidewalls from the grill heater center to cover of heater is 1/4 integral multiple of microwave wavelength.
Described cover of heater is to form with the punching press that is connected as a single entity of cavity top board one side.
Effect of the present invention is that micro-wave oven grill heater device can make the amount that shines the microwave on the hot line minimum, has prevented the damage of heater thus.Because cover of heater and cavity plate form one, can reduce the parts of product thus, the installing engineering of heater is simplified, can reduce production costs, enhance productivity.
Description of drawings
Fig. 1 is general micro-wave oven exploded perspective view;
Fig. 2 is a heater assembly mounting structure plane in the past;
Fig. 3 is a heater assembly mounting structure side view in the past;
Fig. 4 is the decomposition view at each position of heater assembly mounting structure in the past;
Fig. 5 is the embodiment plane of micro-wave oven grill heater device of the present invention;
Fig. 6 is the skiagraph of the embodiment of the invention;
Fig. 7 is the side view of the embodiment of the invention.
Among the figure:
100: heater 102: hot line
104: node 106: the heater fixed part
200: top board 202: cover of heater
202a: sidewall 204: heater mounting hole
206: arrester(-tor)
The specific embodiment
Below, the embodiment to micro-wave oven grill heater of the present invention is described in detail with reference to accompanying drawing.
In the present embodiment, heater 100 is arranged on the inside of the cover of heater 200 of cavity top board 200.The cover of heater 202 of internal heater 100 when forming cavity with top board 200 formation one.Described cover of heater 202 is longer about being, plane of structure amasss less hexahedron, and protrudes in the upside of top board 200, and its lower end forms the structure of opening in order to communicate with the baking oven of inside cavity.
In the present embodiment, the width L1 of cover of heater 202 equal to shine baking oven inside microwave wavelength λ 1/2.And, be 1/4 of microwave wavelength λ from two side wall surfaces of cover of heater 202 to the distance on heater 100 center lines, thereby heater 100 is positioned on the central point of cover of heater 202.When the shape of micro-wave oven was big, the width L1 of described cover of heater 202 was integral multiples of microwave 1/2 wavelength X, and was 1/4 integral multiple of microwave wavelength λ from two side wall surfaces of cover of heater 202 to the distance on heater 100 center lines.Insert the heater mounting hole 204 and together moulding of cover of heater of heater 100.By heater assembling hole 204 length long heater 100 in the left and right sides is installed.The inside of the cylinder type of described heater 100 is provided with the nickel wire 102 that generates heat when connecting power supply, and has possessed on the both sides of heater 100 inside nickel wire 102 and the outside node 104 that is connected.The two ends of described heater 100 utilize heater fixed part 106 sealings that formed by megohmite insulant.Described node 104 utilizes the lead that runs through heater fixed part 106 to link to each other with the external circuit of micro-wave oven.Form on cover of heater 202 two sides of one with top board 200 and to have formed extension heater fixed part 106, thus the arrester(-tor) 206 of the position of fixed heater 100.Cover of heater 202 is that the punching press that is connected as a single entity of any side with the cavity plate forms, and all can reach above-mentioned effect.
Below, the effect of micro-wave oven grill heater device with said structure is described in detail.
In the present invention, the microwave that shines inside cavity is a kind of electromagnetic wave, has the characteristic such as interference, refraction of ripple.Microwave irradiation can produce between incidence wave and the back wave to metallic conductor the time interferes, at this moment because the stack or the decay of ripple are also different from the Energy distribution situation of metallic conductor different distance.
In the present embodiment, two sidewall 202a of cover of heater 202 play the effect of the waveguide of microwave, according to the variation of incident angle and 202 two sidewall 202a of cover of heater width of microwave, the degree of microwave loss and focus on microwave energy difference to some extent on heater 100 hot lines 102.The width L1 of described cover of heater 202 preferably considers the wavelength X and the incidence angle of microwave, makes the energy minimum that shines on heater 100 hot lines, to prevent the damage of heater hot line.
In the present embodiment, based on the width L1 of described cover of heater 202 and distance L 2 with focus on experimental result the energy on the heater 100 from the two side 202a of cover of heater 202 to heater 100, the width of decision cover of heater 202 and the position of heater 100 are so that heater 100 is positioned on the point of microwave energy minimum.
The experimental result that concerns between the microwave amount of leaking to the distance of heater 100 with by the hot line 102 of heater 100 according to two sidewall 202a of cover of heater 202 as can be known, reach 1/2 point of microwave wavelength and reach to the distance L 2 between heater 100 centers at two sidewall 202a of cover of heater 202 on 1/4 the point of microwave wavelength at the width L1 of cover of heater 202, minimum by the energy that heater 100 hot lines 102 are revealed.Thus, when being placed on the two side 202a of cover of heater 202 and heater 100 on the above-mentioned point, can prevent the damage of the heater 100 that microwave causes.
When making, the cover of heater 202 with said structure, puts in the installation process of cavity with top board 200 formation one.Heater 100 is inserted in the installing hole 204, and the left and right sides of heater 100 is fixing by the heater mounting hole on the cover of heater 202 of opposite side 204.The heater fixed part 106 of heater 100 is ridden on the arrester(-tor) 206 of heater mounting hole 204 outsides formation, heater 100 is fixed on the cover of heater 202.Heater 100 is connected with the electric power loop of micro-wave oven by lead after being fixed on the cover of heater 202.
In the present invention, described cover of heater 202 not only can be arranged on the top board, also can be arranged on base plate or the installing plate.And the shape of cover of heater 202 can change according to the quantity and the shape of the heater of being installed 100.
Major technique guiding theory of the present invention is to adjust the position that is provided with of the width of cover of heater 202 and heater 100, heater 100 is arranged on the point of microwave energy minimum.Width at cover of heater is 1/2 integral multiple of microwave wavelength, and the distance between two sidewalls from the heater center to the cover of heater is to be provided with heater on the point of 1/4 integral multiple of microwave wavelength, makes the energy that shines on the heater minimum.
Interest field of the present invention is not limited to the above embodiments, and based on claim scope of the present invention.
Claims (2)
1, a kind of micro-wave oven grill heater device, the grill heater of this device is arranged in the cover of heater of microwave oven cavity top board, cover of heater and cavity top board form one, protrude in the upside of cavity top board, its lower end is provided with the hatch frame that the baking oven interior with being located at microwave oven cavity communicates, it is characterized in that: the width (L1) of described cover of heater (202) is the integral multiple that shines in 1/2 (λ) of the microwave wavelength of baking oven inside, and the distance (L2) two sidewalls from grill heater (100) center to cover of heater (202) is 1/4 integral multiple of microwave wavelength.
2, micro-wave oven grill heater device according to claim 1, described cover of heater (202) are to form with the punching press that is connected as a single entity of cavity top board one side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031048684A CN100343584C (en) | 2003-02-21 | 2003-02-21 | Microwave oven grate heater apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB031048684A CN100343584C (en) | 2003-02-21 | 2003-02-21 | Microwave oven grate heater apparatus |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1523291A CN1523291A (en) | 2004-08-25 |
| CN100343584C true CN100343584C (en) | 2007-10-17 |
Family
ID=34282425
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB031048684A Expired - Fee Related CN100343584C (en) | 2003-02-21 | 2003-02-21 | Microwave oven grate heater apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN100343584C (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5189274A (en) * | 1989-06-13 | 1993-02-23 | Matsushita Electric Industrial Co., Ltd. | Heating method for microwave oven having heat element |
| CN1111744A (en) * | 1993-12-04 | 1995-11-15 | 株式会社金星社 | Microwave oven with heater cover |
| JPH07318075A (en) * | 1994-05-25 | 1995-12-08 | Toshiba Corp | Heating cooker |
| CN2229042Y (en) * | 1995-07-14 | 1996-06-12 | 佛山市富士宝微波制品有限公司 | Broiler heat source device for microwave oven |
| CN1257985A (en) * | 1998-11-23 | 2000-06-28 | Lg电子株式会社 | Heater covering plate for microwave oven using light wave heater |
| CN1356500A (en) * | 2000-11-30 | 2002-07-03 | Lg电子株式会社 | Heater of microwave oven |
| JP2003007434A (en) * | 2001-06-19 | 2003-01-10 | Sharp Corp | Radiation electric heater |
-
2003
- 2003-02-21 CN CNB031048684A patent/CN100343584C/en not_active Expired - Fee Related
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5189274A (en) * | 1989-06-13 | 1993-02-23 | Matsushita Electric Industrial Co., Ltd. | Heating method for microwave oven having heat element |
| CN1111744A (en) * | 1993-12-04 | 1995-11-15 | 株式会社金星社 | Microwave oven with heater cover |
| JPH07318075A (en) * | 1994-05-25 | 1995-12-08 | Toshiba Corp | Heating cooker |
| CN2229042Y (en) * | 1995-07-14 | 1996-06-12 | 佛山市富士宝微波制品有限公司 | Broiler heat source device for microwave oven |
| CN1257985A (en) * | 1998-11-23 | 2000-06-28 | Lg电子株式会社 | Heater covering plate for microwave oven using light wave heater |
| CN1356500A (en) * | 2000-11-30 | 2002-07-03 | Lg电子株式会社 | Heater of microwave oven |
| JP2003007434A (en) * | 2001-06-19 | 2003-01-10 | Sharp Corp | Radiation electric heater |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1523291A (en) | 2004-08-25 |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20071017 |