CN106016391A

CN106016391A - Microwave oven

Info

Publication number: CN106016391A
Application number: CN201610466503.7A
Authority: CN
Inventors: 李伟; 李东宪; 安明波; 何洪涛
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2016-06-21
Filing date: 2016-06-21
Publication date: 2016-10-12

Abstract

The invention discloses a microwave oven. The microwave oven comprises an electric chamber and a back plate; a fan and a frequency converter are arranged in the electric chamber; the frequency converter has a shell; the shell has a top plate, and a first side plate facing to the back plate; an air inlet is formed in the top plate; an air outlet is formed in the lower end of the first side plate; the air inlet is communicated with an air outlet end of the fan; and the air outlet is communicated with a cooling port formed in the back plate. The microwave oven prevents faults caused by higher temperature rise of the frequency converter, and improves the working efficiency.

Description

Microwave oven

Technical field

The present invention relates to field of kitchen electric appliance, particularly to a kind of microwave oven.

Background technology

Being usually provided with converter in the electric panel room of microwave oven, converter temperature limit operationally compares Low, need to be dispelled the heat to converter by a fan.

In existing microwave oven, the shell of converter is provided with the air inlet connected with fan outlet air end, And with the air outlet of ft connection, cool exterior air is imported in converter by air inlet, then by fan Being blown out by air outlet, in the process, air is that direct current passes through converter, and converter content is easily formed Dead angle area, the too high easy initiation converter job failure of dead angle area temperature, cause the microwave oven can not be normal Work, and then affect the work efficiency of microwave oven.

Summary of the invention

The main object of the present invention is to propose a kind of microwave oven, it is intended to improve the work efficiency of microwave oven.

For achieving the above object, a kind of microwave oven that the present invention proposes, this microwave oven has electric panel room and the back of the body Plate, is provided with fan and converter in described electric panel room, described converter includes shell, and described shell has There is top board and face the first side plate of described backboard, described top board offers air inlet, described first side Plate is provided with air outlet, and described air inlet connects with the outlet air end of described fan, and described air outlet is with described The thermovent connection arranged on backboard.

Preferably, described converter has circuit board, and described circuit board faces described first side plate and arranges, The multiple radiating fins facing described first side plate it are provided with on described circuit board.

Preferably, the plurality of radiating fin vertically to extend and be set in distance, the plurality of fin Between gap form the vertical air channel that connects with described air inlet, the lower end of the plurality of fin is with described The bottom of housing is set in distance, so that being formed with the lower section being positioned at the plurality of fin in described housing Laterally air channel, described horizontal air channel connects described vertical air channel to described air outlet.

Preferably, described shell also includes the base plate relative with described top board, described base plate is provided with and props up Support the support bar of described circuit board, described support bar make described circuit board and the plurality of radiating fin with Described base plate is set in distance.

Preferably, described converter has circuit board, and described shell also includes adjacent described first side plate Second side plate, the inwall of described second side plate is provided with the convex tendon abutted with described circuit board.

Preferably, described convex tendon is directed away from the direction of described first side plate and extends, the extension of described convex tendon End is provided with and faces away from the baffle plate that the direction of described second side plate extends.

Preferably, described housing includes fore shell, and described first side plate arranged with described fore shell split, In being provided with button hole on the second side plate described in two be oppositely arranged, described first side plate is provided with and institute State the clasp that button hole position is corresponding, and described first side plate is consolidated by the snapping of described clasp Yu described button hole Due to described second side plate.

Preferably, shell also includes the drain mouth connecting described air outlet and described thermovent, described drain Mouth from described air outlet towards on the direction of described thermovent in tapered setting.

Preferably, the outside wall surface of described backboard is provided with a cover cap in the blower cover of described thermovent, described Blower cover opening upwards.

Preferably, described blower cover has an abutting plate facing described backboard, the appearance of described abutting plate Face is provided with projection.

Technical scheme offers air inlet by the top board at converter, in the first side of converter Plate sets out air port, so that the air-out direction of the air intake direction of air inlet and air outlet is staggered, works as sky When gas enters the inner chamber of converter, air forms turbulent flow in the lumen, makes the heat dissipation for circuit board of converter more Uniformly, it is to avoid converter is initiating failure because temperature rise is too high, thus improves the work efficiency of microwave oven.

Accompanying drawing explanation

In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, below will be to reality Execute the required accompanying drawing used in example or description of the prior art to be briefly described, it should be apparent that below, Accompanying drawing in description is only some embodiments of the present invention, for those of ordinary skill in the art, On the premise of not paying creative work, it is also possible to obtain other according to the structure shown in these accompanying drawings Accompanying drawing.

Fig. 1 is the structural representation of microwave oven one embodiment of the present invention；

Fig. 2 is the internal structure framework map of microwave oven in Fig. 1；

Fig. 3 is the internal structure framework map of microwave oven in Fig. 1, and wherein, converter is split out；

Fig. 4 is the structural representation of converter in Fig. 3；

Fig. 5 be in Fig. 1 microwave oven operationally, internal gas flow flow graph；

Fig. 6 is the Split type structure schematic diagram of converter in Fig. 4.

Drawing reference numeral illustrates:

Label	Title	Label	Title
				10	Microwave oven	11	Fan
12	Magnetron	13	Converter
				14	Backboard	15	Blower cover
16	Protruding	130	Top board
				131	First side plate	132	Second side plate
133	3rd side plate	134	Base plate
				135	Circuit board	136	Radiating fin
137	Drain mouth	130a	Air inlet
				131a	Air outlet	131b	Clasp
132a	Button hole	132b	Convex tendon
				132c	Baffle plate	134a	Support bar

The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, do referring to the drawings further Explanation.

Detailed description of the invention

Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is carried out Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the present invention, Rather than whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art are not having Make the every other embodiment obtained under creative work premise, broadly fall into the scope of protection of the invention.

It is to be appreciated that if the embodiment of the present invention relates to directivity instruction (such as upper and lower, left and right, It is forward and backward ...), then directionality instruction is only used for explaining under a certain particular pose (as shown in drawings) Relative position relation between each parts, motion conditions etc., if this particular pose changes, then Directionality instruction changes the most therewith.

If it addition, the embodiment of the present invention relates to the description of " first ", " second " etc., then be somebody's turn to do " the One ", the description of " second " etc. is only used for describing purpose, and it is not intended that instruction or imply that it is relatively heavy The property wanted or the implicit quantity indicating indicated technical characteristic.Thus, " first ", " second " are defined Feature can express or implicitly include at least one this feature.It addition, between each embodiment Technical scheme can be combined with each other, but must be based on those of ordinary skill in the art are capable of, When the combination of technical scheme occur conflicting maybe cannot realize time will be understood that the combination of this technical scheme Do not exist, the most not within the protection domain of application claims.

The present invention proposes a kind of microwave oven.

Seeing figures.1.and.2, microwave oven 10 typically has casing, has cooking cavity, cooking cavity in casing After be provided with electric panel room, electric panel room is provided with fan 11, magnetron 12, converter 13.Generally, magnetic Keyholed back plate 12 is positioned in the middle part of electric panel room, and fan 11 is positioned at right position above electric panel room, and converter 13 is positioned at Right position below electric panel room.With reference to Fig. 5, when fan 11 works, produce suction, cool exterior air from Air flow inlet below the fire door of complete machine front enters in the space between casing and cooking cavity, through passing through fan 11 Shunting, after a part is used for cooling down magnetron 12, discharges from the air outlet of magnetron 12, another part Enter in the converter 13 below fan 11, after cooling converter 13, from the air outlet of converter 13 Discharge.

In embodiments of the present invention, with reference to Fig. 3 and Fig. 4, microwave oven 10 has electric panel room and backboard 14, Being provided with fan 11 and converter 13 in electric panel room, converter 13 includes that shell, shell have top board 130 With face the first side plate 131 of backboard 14, top board 130 offers air inlet 130a, the first side plate 131 It is provided with air outlet 131a, air inlet 130a to connect with the outlet air end of fan 11, air outlet 131a and the back of the body The thermovent connection arranged on plate 14.

Concrete, with reference to Fig. 6, in the present embodiment, converter 13 includes shell and is arranged in shell Circuit board 135, be formed with an inner chamber in shell, circuit board 135 is fixed on the inwall of inner chamber.Fan 11 by air from air inlet 130a import shell inner chamber time, first, air is in the upper end of inner chamber blows to The lower end in chamber, air forms air pressure in the lumen, and under gas pressure, air is from the first side plate 131 Air outlet 131a discharges.Here, the air intake direction of air inlet 130a and the air-out direction of air outlet 131a It is (with reference to the Fig. 3, in figure, air intake direction and air-out direction are that 90 ° of angles are arranged) staggered, air It not the most direct current, when air blows to lower end from the upper end of inner chamber, anti-by the base plate 134 of shell Penetrating effect, the air draught in inner chamber forms turbulent flow, play in turbulent flow multiple directions in the lumen, and then Reduce the formation of dead angle area in inner chamber, make air mix homogeneously in inner chamber, circuit board 135 radiating effect More preferably.

Technical scheme offers air inlet 130a, in frequency conversion by the top board 130 at converter 13 First side plate 131 of device 13 sets out air port 131a so that the air intake direction of air inlet 130a with go out The air-out direction of air port 131a is staggered, and when air enters the inner chamber of converter 13, air is at inner chamber Middle form turbulent flow, make the circuit board 135 of converter 13 dispel the heat evenly, it is to avoid converter 13 is because of temperature Rise too high and initiating failure, thus improve the work efficiency of microwave oven 10.

With continued reference to Fig. 6, circuit board 135 is usually provided with radiating fin 136, in view of the heat conduction of aluminium Better performances, radiating fin 136 generally aluminium sheet.The mounting means of radiating fin 136 is typically along entering Wind direction extends, consequently facilitating air quickly passes through the gap between two radiating fins 136, by heat Take away.And in the present embodiment, described converter 13 has circuit board 135, described circuit board 135 Arranging towards described first side plate 131, radiating fin 136 faces the first side plate 131 and arranges.So, empty Gas is through behind the gap radiating fin 136, and by the barrier effect of radiating fin 136, air is not Can flow to air outlet 131a at once, but play forms turbulent flow in the lumen, the air-flow of play is full of in interior The various piece in chamber, thus mix, finally from going out under gas pressure with the air of various piece in inner chamber Air port 131a discharges, and is taken away by heat, better heat-radiation effect.

With reference to Fig. 6, on the basis of a upper embodiment, multiple radiating fins 136 vertically to extend and in Interval is arranged, and the gap between multiple radiating fins 136 forms the vertical air channel connected with air inlet 130a, The lower end of multiple radiating fins is set in distance with the bottom of housing so that be formed in housing be positioned at multiple The horizontal air channel of the lower section of radiating fin, the vertical air channel of connection, horizontal air channel to air outlet 131a.In this reality Executing in example, it is L-shaped curved that air inlet 130a, vertical air channel, horizontal air channel and air outlet 131a form one The path, air channel of folding, thus improve turbulent flow effect.

With continued reference to Fig. 6, circuit board 135 is affixed to the sidewall of shell, it is contemplated that circuit board 135 is pacified After being loaded on inner chamber, lumen segmentation is two chambers by circuit board 135, it may be assumed that near the first side plate 131 First chamber and the second chamber away from the first side plate 131.If two chamber air circulations are bad, Radiating effect so will be caused poor.Such as, the air in the first chamber can be easy to from air outlet 131a discharges, and the air in the second chamber is due to the stop by circuit board 135, it is difficult to from air outlet 131a discharges, and certainly can only be exchanged with each other in upward and downward by the air in the second chamber, and by the second chamber Upper end flow in the first chamber.So, the heat radiation of circuit board 135 is had a strong impact on.In another embodiment In, shell also includes the base plate 134 relative with top board 130, and base plate 134 is provided with support circuit board The support bar 134a of 135, described support bar 134a make described circuit board 135 and the plurality of radiating fin Sheet 136 is set in distance with described base plate 134.Specifically, between circuit board 135 and base plate 134 Having gap, this gap, by the first chamber and the second chamber, enters the air in the second chamber at gas Under pressure effect, can flow into the first chamber from this gap, finally be discharged by air outlet 131a, thus carry High radiating effect.

With continued reference to Fig. 6, in a preferred embodiment, shell also includes adjacent described first side plate 131 Second side plate 132 (the second side plate 132 has two pieces), and threeth side plate relative with the first side plate 131 133, the inwall of the second side plate 132 is provided with the convex tendon 132b abutted with circuit board 135.On the one hand, convex Arranging of muscle 132b has supporting role to circuit board 135, strengthens the stability that circuit board 135 is installed； On the other hand, after arranging convex tendon 132b, being interconnected between two chambers, the air in the second chamber can Flow in the first chamber with much smoother, thus discharge from air outlet 131a.

With continued reference to Fig. 6, in another embodiment, convex tendon 132b is directed away from the first side plate 131 Direction extend, the extending end of convex tendon 132b be provided with face away from the second side plate 132 direction extend Baffle plate 132c.Arranging of this baffle plate 132c can have backstop action, air-flow to from the air-flow blown downwards After blowing to this baffle plate 132c, under the effect of this baffle plate 132c, understand play around baffle plate 132c, from And further increase turbulent flow effect, it is to avoid near the circuit board 135 part heat build-up of the second side plate 132.

With continued reference to Fig. 6, described housing includes fore shell, and described first side plate arranged with fore shell split 131, in being provided with button hole on the second side plate 132 described in two be oppositely arranged, described first side plate 131 On be provided with the clasp 131b corresponding with described button hole 132a position, described first side plate pass through described clasp The snapping of 131b and described button hole 132a and be fixed on described second side plate 132..

Specifically, the second side plate 132 has two pieces, lays respectively at the left and right sides of the first side plate 131, Radiating fin 136 is arranged near one of them second side plate 132.It is respectively provided with on two the second side plates 132 Button hole 132a, is provided with the clasp 131b corresponding with button hole 132a position on the first side plate 131, and first Side plate 131 is fixed on the second side plate 132 by the snapping of clasp 131b and button hole 132a, here, button Button hole 132a will not be blocked by hook 131b, and button hole 132a self leaves pre-degree.So, button hole 132a Also have outside heat sinking function.

With reference to Fig. 4 and Fig. 6, in order to improve the air pressure in inner chamber, in a preferred embodiment, shell also wraps Include connection air outlet 131a and the drain mouth 137 of thermovent, drain mouth 137 from air outlet 131a towards dissipating In tapered setting on the direction of hot mouth.After arranging drain mouth 137, the pressure in inner chamber is bigger, turbulent flow effect More preferably, radiating effect is more preferable for fruit.

With reference to Fig. 2, the air discharged due to thermovent is hot-air, and the quality of hot-air is less, easily on Rise；When air pressure deficiency in the inner chamber of shell, if the hot-air of discharge discharges downwards, it is likely that cause Hot air reflow in blower cover 15, impact heat radiation.In view of the foregoing, the outside wall surface of backboard 14 sets It is equipped with a cover cap in the blower cover 15 of thermovent, blower cover 15 opening upwards.So, when hot-air is by dissipating After hot mouth is discharged, hot-air can be discharged by the opening upwards of blower cover 15 rapidly.

With continued reference to Fig. 2, microwave oven 10 is generally positioned at the position by wall, the blower cover of microwave oven 10 15 often contact with body of wall, and Long Term Contact is easily caused blower cover 15 and is worn, gets rusty, and even affects Aerofluxus.In the present embodiment, blower cover 15 has an abutting plate (not indicating in figure) facing backboard 14, The outer surface abutting plate is provided with protruding 16.After arranging protruding 16, have between blower cover 15 and body of wall Certain gap, is on the one hand easy to the discharge of steam, on the other hand, blower cover 15 is had protective effect. In a preferred embodiment, this projection 16 is elastic component, such as rubber, silica gel or latex etc..

These are only the preferred embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every Under the inventive concept of the present invention, utilize the equivalent structure transformation that description of the invention and accompanying drawing content are made, Or directly/be indirectly used in other relevant technical fields and be included in the scope of patent protection of the present invention.

Claims

1. a microwave oven, has electric panel room and backboard, is provided with fan and converter in described electric panel room, It is characterized in that, described converter includes that shell, described shell have top board and face the of described backboard Side plate, described top board offers air inlet, and described first side plate is provided with air outlet, described air intake Mouth connects with the outlet air end of described fan, and described air outlet connects with the thermovent arranged on described backboard.

2. microwave oven as claimed in claim 1, it is characterised in that described converter has circuit board, Described circuit board faces described first side plate and arranges, and described circuit board is provided with and faces described first side plate Multiple radiating fins.

3. microwave oven as claimed in claim 2, it is characterised in that the plurality of radiating fin is vertically To extending and being set in distance, it is perpendicular that the gap formation between the plurality of fin connects with described air inlet To air channel, the lower end of the plurality of fin is set in distance with the bottom of described housing, so that described housing Inside being formed with the horizontal air channel of the lower section being positioned at the plurality of fin, the connection of described horizontal air channel is described vertically Air channel is to described air outlet.

4. microwave oven as claimed in claim 3, it is characterised in that described shell also includes and described top The base plate that plate is relative, described base plate is provided with the support bar supporting described circuit board, and described support bar makes Obtain described circuit board and the plurality of radiating fin is set in distance with described base plate.

5. microwave oven as claimed in claim 1, it is characterised in that described converter has circuit board, Described shell also includes the second side plate of adjacent described first side plate, and the inwall of described second side plate is provided with The convex tendon abutted with described circuit board.

6. microwave oven as claimed in claim 5, it is characterised in that described convex tendon is directed away from described the The direction of side plate extends, and the extending end of described convex tendon is provided with the side facing away from described second side plate To the baffle plate extended.

7. microwave oven as claimed in claim 5, it is characterised in that described housing includes fore shell, and Described first side plate arranged with described fore shell split, is all provided with on the second side plate described in two be oppositely arranged It is equipped with button hole, described first side plate is provided with the clasp corresponding with described button hole position, described first side Plate is fixed on described second side plate by described clasp and the snapping of described button hole.

8. microwave oven as claimed in claim 1, it is characterised in that shell also includes connecting described air-out Mouthful and the drain mouth of described thermovent, described drain mouth from described air outlet towards the direction of described thermovent On in tapered setting.

9. microwave oven as claimed in claim 1, it is characterised in that the outside wall surface of described backboard is provided with One cover cap is in the blower cover of described thermovent, described blower cover opening upwards.

10. microwave oven as claimed in claim 9, it is characterised in that described blower cover has and faces The abutting plate of described backboard, the outer surface of described abutting plate is provided with projection.