CN207613651U

CN207613651U - Oven

Info

Publication number: CN207613651U
Application number: CN201720761892.6U
Authority: CN
Inventors: 陈祥利
Original assignee: ZHEJIANG KOMPAC CATERING EQUIPMENT Co Ltd
Current assignee: Anpai Zhichu Zhejiang Co ltd
Priority date: 2017-06-28
Filing date: 2017-06-28
Publication date: 2018-07-17
Anticipated expiration: 2027-06-28

Abstract

The utility model is related to a kind of ovens.It solves the prior art and designs the technical problems such as unreasonable.This oven includes the stove seat for having chamber, the heating tube being vertically arranged and the tubular transparent shield being set on the outside of heating tube are equipped on stove seat, it is equipped with the oil drain pan being sleeved on the outside of heating tube above the upper surface of stove seat and there are gaps between oil drain pan and stove seat upper surface, bottom is equipped with several spaced vertical positioning sleeves in oil drain pan, it is equipped with brochette loop bar respectively in each vertical positioning sleeve and is equipped with the oily location structure of axial gear between brochette loop bar and vertical positioning sleeve, the brochette loop bar is connect with driving mechanism is rotated synchronously, air inlet is equipped on stove seat, being equipped in chamber can be to the heat dissipation blowing device of up-draught, it is equipped with the ventilation hole of at least one and described chamber in the upper surface of stove seat and the ventilation hole outlet air end is located at below oil drain pan.The utility model has the advantage of：Design is more reasonable and heat dissipation performance is more preferable.

Description

Oven

Technical field

The utility model belongs to electric oven technical field more particularly to a kind of oven.

Background technology

Its structure of oven generally comprises pedestal and several brochette loop bars being set on the base, brochette loop bar and driving machine Structure connects, and has oil drain pan on pedestal, is carried out currently, the heat dissipation of driving mechanism generally carries out downward radiating mode using fan Heat dissipation.

It disclosure satisfy that requirement to this radiating mode, and still, at present in entire industry, the heat dissipation of oil drain pan is certainly The right type of cooling, has the following technical problems：

When 1, toppling over the grease in oil drain pan, since oil drain pan relatively scalds, tool ability end can only be contacted by, which causing, plays oil drain pan, To complete to topple over operation.

2, it is easy to happen scald accident during brochette.

In addition, above-mentioned oven its in the grease in toppling over oil drain pan, brochette loop bar at this time, which is easily separated from, connects oil Disk results in the need for re-assemblying, and secondly, current its grease of brochette loop bar is directly flowed down along its axial direction, leads to brochette furnace base Internal deposited fat, cleaning are very cumbersome.

In order to solve above-mentioned technical problem, for example, Chinese patent literature discloses a kind of electric oven [application number： 201220708850.3], furnace interior is equipped with insulating layer, and in opening, turnup forms bracket, fever to the furnace body outward Body is spring-like and is installed in bottom of furnace body in inverted " u "-shaped, and round baking tray is equipped with the strip notch of annular array, described Baking tray is additionally provided with round hole in centre, and the gap of notch extends to the baking tray center of circle and is connected with hollow hole, and baking tray buckles On bracket, bell buckles on baking tray and covers hollow hole, and roasting label top screws togather knop, and the diameter of knop is more than The width of notch, the program is easy-to-use, and when advantageously reducing baking heat loss.

Although above-mentioned scheme have the advantages that it is above many, above-mentioned scheme does not solve above-mentioned skill thoroughly Therefore art problem is badly in need of designing a electric oven that can be to solve the above technical problems.

Utility model content

The purpose of this utility model is in view of the above-mentioned problems, to provide a kind of heat dissipation performance more preferable and can prevent from coming off and bake The oven of long-pending oil inside string furnace base.

In order to achieve the above objectives, the utility model uses following technical proposal：This oven includes the stove for having chamber Seat is equipped with the heating tube being vertically arranged and the tubular transparent shield being set on the outside of heating tube, in the upper of stove seat on stove seat Surface is equipped with and is sleeved on the oil drain pan on the outside of heating tube and there are gaps between oil drain pan and stove seat upper surface, in oil drain pan Bottom is equipped with several spaced vertical positioning sleeves, is equipped with brochette loop bar respectively in each vertical positioning sleeve and in brochette The oily location structure of axial gear is equipped between loop bar and vertical positioning sleeve, the brochette loop bar connects with driving mechanism is rotated synchronously It connects, air inlet is equipped on stove seat, be equipped with and can be equipped with to the heat dissipation blowing device of up-draught in the upper surface of stove seat in chamber The ventilation hole of at least one and described chamber and the ventilation hole outlet air end are located at oil drain pan lower section.

The ventilation hole of setting can not only radiate to driving mechanism, but also can radiate to oil drain pan, It avoids scald etc. accident caused by toppling over oil drain pan and secondly further improves operating efficiency.

The vertical positioning sleeve being arranged combines the oily location structure of axial gear, and axial fixation not only may be implemented, but also Axial gear oil may be implemented, avoid grease and go downstream and enter in stove seat, this further improves spatter properties and practicality Performance.

In above-mentioned oven, the oily location structure of axial gear includes the convex positioning of vertical positioning sleeve inner wall Portion, the oily convex body of annular gear is equipped in the upper end of brochette loop bar, and tubular positioning body, convex positioning are socketed in the lower end of brochette loop bar The outer diameter in portion is more than the internal diameter of convex positioning region, and the outer diameter of tubular positioning body is more than the internal diameter of convex positioning region, the convex Positioning region is located between the oily convex body of annular gear and the upper end of tubular positioning body.

The upper end of tubular positioning body is sleeved on the lower end of brochette loop bar, and interior convex positive stop is equipped in the upper end inner wall of tubular positioning body Body is equipped with connection bolt in tubular positioning body, and the cap end for connecting bolt is resisted against the lower surface of convex limit body, connects spiral shell The upper end of bolt is threadedly coupled with the screw hole of brochette loop bar lower end.

The lower surface that oily convex body is kept off in annular is equipped with annular groove.

In above-mentioned oven, the brochette loop bar upper end is equipped with the roasting label jack being vertically arranged, in annular gear oil Convex body is equipped with the horizontal outage with the roasting label jack vertical connection.

Roasting label jack is up big and down small tapered blind hole.

It is equipped at least symmetrically arranged extension slot of twice, the lower end of extension slot and horizontal oil extraction on the hole wall of roasting label jack Hole is connected to.

The extension slot of setting is not only convenient for the fixation of flat label, but also can flowing down in order to grease.

In above-mentioned oven, the synchronous rotation driving mechanism includes being fixed on the indoor positioning plate of chamber, fixed Position plate is equipped with several and described one-to-one drive shafts of tubular positioning body, passes through gear between adjacent two drive shafts Drive mechanism engagement connection, at least a drive shaft is connect with driving device, is led between the tubular positioning body and drive shaft Cross clutch transmission structure connection.

Gear transmission structure includes the transmission gear being arranged every drive shaft lower end, adjacent two transmission gear engagements Connection, drive shaft are threaded through on positioning plate and can the rotations of relative positioning plate.

Bearing is equipped between drive shaft and positioning plate.

Clutch transmission structure connects for male-female engagement, coordinate breach is equipped in the lower end of tubular positioning body, in the upper of drive shaft End is equipped with the clutch protrusion being stuck in the coordinate breach.

By the design of clutch transmission structure, be detached from synchronous with brochette loop bar can be played in order to the end of oil drain pan.

Brochette loop bar is encircled into a circle, and ventilation hole is encircled into a circle, be encircled into a circle ventilation hole be located at be encircled into a circle Brochette loop bar on the inside of.

Above-mentioned structure, can distributing in time in order to heat.

In above-mentioned oven, the lower end of the heating tube stretches in chamber and is consolidated by plug-in bindiny mechanism It is scheduled on positioning plate.

In above-mentioned oven, the plug-in bindiny mechanism includes the power supply base being arranged at positioning plate center, It is set on power supply base there are two the positioning through hole being mutually parallel, be equipped with respectively in each positioning through hole for electrical prongs and determined Position through-hole upper end and for forming annular space between the upper end of electrical prongs, the lower end of heating tube be equipped be sleeved on power supply base Cooperation cylindrical body, cooperation cylindrical body in be equipped with two with described for the one-to-one tubular grafting set of electrical prongs, it is described Tubular grafting set insert in annular space and be sleeved in electrical prongs.

Power supply base upper end is equipped with lower positioning step, is equipped with and the lower positioning step phase in the lower end of cooperation cylindrical body The upper positioning step mutually coordinated.

Coordinate cylindrical body lateral cross section rectangular, cylinder is connected in the upper end of cooperation cylindrical body, in the outer of cylinder Wall is equipped with the salient point of several circle distributions.

Interfix set is sleeved on cylinder.

It is respectively equipped with chamfering in the upper end of each positioning through hole.

The fixation bottom plate center is equipped with through-hole, and the power supply base inserts in through-hole and by being detachably connected machine Structure is fixed on positioning plate.

The detachable attachment mechanism includes the positioning protrusion being arranged in power supply base upper end circumferential direction, on positioning protrusion It is equipped with several attachment screws being threadedly coupled with the positioning plate.

In above-mentioned oven, the oily convex body of annular gear is circumferentially with the inclined surface being arranged diagonally downward.

Its flowing down convenient for grease of inclined surface, simultaneously, it is thus also avoided that flow into stove seat, design is more reasonable, after being convenient for Continuous maintenance and cleaning.

In above-mentioned oven, the oil drain pan and vertical positioning sleeve are integrally formed by casting.

In above-mentioned oven, the oil drain pan upper surface has the recess being downwardly concaved, ventilation hole tool There are several and is arranged in the bottom of recess.

The recess of formation expands the heat dissipation area of oil drain pan, that is, further improves radiating efficiency.

In above-mentioned oven, the oil drain pan center is equipped with and the integrally formed interfix of oil drain pan casting Set, interfix set are sleeved on the lower end of heating tube.That is, interfix set is sleeved on cylinder.

Compared with prior art, it is the advantages of this oven：

1, by the way that the oily location structure of axial gear is arranged, it not only may be implemented the effect of gear oil and water conservancy diversion, but also can be with Play the technical issues of preventing brochette loop bar from falling off

2, more reasonable, the ventilation hole of setting is designed, can not only be radiated to electric drive mechanism, but also can be right Oil drain pan radiates, and avoids scald etc. accident caused by toppling over oil drain pan and secondly further improves operating efficiency.

3, simple in structure and easily fabricated.

4, the recess formed expands the contact area of air-flow and oil drain pan, and heat dissipation is more stablized and efficiency is more preferable.

Description of the drawings

Fig. 1 is dimensional structure diagram provided by the utility model.

Fig. 2 is oven schematic cross-sectional view provided by the utility model.

Fig. 3 is confined explosion's structural schematic diagram provided by the utility model.

Fig. 4 is upper cover plate structure schematic diagram provided by the utility model.

Fig. 5 is brochette loop bar structure schematic diagram provided by the utility model.

Fig. 6 is that another visual angle brochette loop bar provided by the utility model regards structural schematic diagram.

Fig. 7 is brochette loop bar assembled state structural schematic diagram provided by the utility model.

Fig. 8 is stove seat dimensional structure diagram provided by the utility model.

Fig. 9 is another visual angle oven schematic cross-sectional view provided by the utility model.

Figure 10 is the structural schematic diagram of plug-in bindiny mechanism provided by the utility model.

In figure, stove seat 1, bottom case 1a, upper cover 1b, case ring 1c, stabilizer blade 1d, convex recess 1e, control unit 1f, air inlet 11, ventilation hole 12, heating tube 2, tubular transparent shield 3, upper cover plate 31, scallop hole 32, roasting label card entry slot 33, under convex ogive 34, oil drain pan 4, vertical positioning sleeve 41, convex positioning region 42, interfix set 43, recess 44, brochette loop bar 5, annular gear oil are convex Body 51, tubular positioning body 52, roasting label jack 53, horizontal outage 54, connection bolt 55, rotates synchronously driving machine at inclined surface 511 Structure 6, positioning plate 61, drive shaft 62, transmission gear 63, heat dissipation blowing device 7, power supply base 81, for electrical prongs 82, cooperation tubular Body 83, tubular grafting set 84, chamber a.

Specific implementation mode

It is the specific embodiment of utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these examples.

As shown in Figs. 1-3, this oven includes the stove seat 1 for having chamber a, which includes bottom case 1a, bottom case 1a's Opening connection is connected with upper cover 1b by case ring 1c, and the lower connection coordinated with bottom case 1a openings is equipped in the lower end of case ring 1c Slot is connected with the upper link slot circumferentially coordinated with upper cover 1b in the upper end of case ring 1c.Link slot is respectively annular groove.

The case ring 1c of setting combines lower link slot and upper link slot, can improve leakproofness, avoids grease entrance Lead to the damage of component.Secondly, the stability of structure is further improved, in addition, further improving the aesthetics of structure.

Secondly, several stabilizer blade 1d are equipped in the bottom of bottom case 1a.

In addition, the two bottom sides in bottom case 1a are respectively equipped with convex recess 1e, the convex recess 1e of setting its can be in order to Grabbing when carrying is taken.

Control unit 1f is equipped on upper cover 1b comprising several control buttons.

It is additionally provided with several fasteners between bottom case 1a and upper cover 1b, is located in chamber, aesthetics can not only be improved, But also structural strength can be further increased.

As shown in Figs 1-4, the tubular that the heating tube 2 being vertically arranged is equipped on stove seat 1 and is set in 2 outside of heating tube is saturating Bright protective cover 3, tubular transparent shield 3 are made of pyroceram material, and upper cover is equipped at the top of tubular transparent shield 3 Plate 31 is equipped with the scallop hole 32 of several even circumferentials distribution on upper cover plate 31, muscle body is formed between adjacent two scallop holes, It is in open roasting label card entry slot 33 to be respectively equipped at least one opening in the both sides of every muscle body, bakes label 33 opening of card entry slot Bore be less than the internal diameter of roasting label 33 slot bottom of card entry slot.

The roasting label card entry slot 33 being arranged can further consolidate roasting label, keep brochette barbecue more uniform.

Secondly, further respectively had on every muscle body it is at least one under convex ogive 34.Convex ogive 34 under setting, Structure can be further strengthened.

The oil drain pan 4 for being sleeved on 2 outside of heating tube and 1 upper surface of oil drain pan 4 and stove seat are equipped with above the upper surface of stove seat 1 Between there are gaps, tubular transparent shield 3 to be placed on the step surface of 4 upper surface of oil drain pan.

As Figure 2-3, bottom is equipped with several spaced vertical positioning sleeves 41 in oil drain pan 4, oil drain pan 4 and vertical Formula positioning sleeve 41 is integrally formed by casting.It is equipped at 4 center of oil drain pan and casts integrally formed interfix set with oil drain pan 4 43, interfix set 43 is sleeved on the lower end of heating tube 2.

As illustrated in figs. 5-7, it is equipped with brochette loop bar 5 respectively in each vertical positioning sleeve 41 and in brochette loop bar 5 and vertical The oily location structure of axial gear is equipped between formula positioning sleeve 41, specifically, the oily location structure of axial direction gear includes vertical positioning sleeve 41 The convex positioning region 42 of inner wall is equipped with the oily convex body 51 of annular gear in the upper end of brochette loop bar 5, is socketed in the lower end of brochette loop bar 5 There are tubular positioning body 52, the outer diameter of convex positioning region 42 to be more than the internal diameter of convex positioning region 42, the outer diameter of tubular positioning body 52 is big Internal diameter in convex positioning region 42, the convex positioning region 42 are located at the upper end of annular gear oily convex body 51 and tubular positioning body 52 Between.

Vertical positioning sleeve 41 and convex positioning region 42 are connected as a single entity structure.

Secondly, it is sleeved on the lower end of brochette loop bar in the upper end of tubular positioning body, is equipped in the upper end inner wall of tubular positioning body Convex limit body is equipped with connection bolt 55 in tubular positioning body, and the cap end for connecting bolt is resisted against under convex limit body Surface, the upper end for connecting bolt are threadedly coupled with the screw hole of brochette loop bar lower end.

In addition, be equipped with the roasting label jack 53 that is vertically arranged in 5 upper end of brochette loop bar, annular keep off on oily convex body 51 be equipped with The horizontal outage 54 of roasting 53 vertical connection of label jack.

Brochette loop bar 5 is circularly and evenly distributed.

Oily convex body 51, which is kept off, in annular is circumferentially with the inclined surface 511 being arranged diagonally downward.

It is equipped at least symmetrically arranged extension slot 56 of twice, the lower end of extension slot and horizontal row on the hole wall of roasting label jack Oilhole is connected to.

As shown in Fig. 2, brochette loop bar 5 is connect with driving mechanism 6 is rotated synchronously, which includes solid The positioning plate 61 being scheduled in chamber a is equipped with the driving correspondingly of several and described tubular positioning bodies 52 on positioning plate 61 Axis 62, passes through gear transmission structure engagement connection between adjacent two drive shafts 62, and an at least drive shaft 62 is filled with driving Connection is set, is connected by clutch transmission structure between the tubular positioning body 52 and drive shaft 62.

Gear transmission structure includes the transmission gear 63 being arranged every drive shaft lower end, and adjacent two transmission gears are nibbled Connection is closed, drive shaft is threaded through on positioning plate and can the rotation of relative positioning plate.

Bearing is equipped between drive shaft and positioning plate.

As shown in Fig. 2 and Fig. 9-10, the lower end of heating tube 2 stretches in chamber a and is fixed by plug-in bindiny mechanism On positioning plate 61.Specifically, which includes the power supply base 81 being arranged at 61 center of positioning plate, is being powered It is set on socket 81 there are two the positioning through hole being mutually parallel, be equipped with respectively in each positioning through hole for electrical prongs 82 and positioned The upper end of through-hole and for forming annular space between the upper end of electrical prongs 82 is equipped in the lower end of heating tube 2 and is sleeved on power supply base Cooperation cylindrical body 83 on 81 is equipped with two in cooperation cylindrical body 83 and is inserted for 82 one-to-one tubular of electrical prongs with described Female connector 84, tubular grafting set 84 are inserted in annular space and are sleeved in electrical prongs 82.

Tubular grafting covers 84 and is electrically connected for the realization of electrical prongs 82.

Secondly, power supply base upper end be equipped with lower positioning step 811, cooperation cylindrical body lower end be equipped with it is described under The mutually matched upper positioning step of positioning step 831.

Coordinate cylindrical body lateral cross section rectangular, cylinder 832 is connected in the upper end of cooperation cylindrical body, in cylinder Outer wall is equipped with the salient point of several circle distributions.

Interfix set is sleeved on cylinder.

As shown in Fig. 2-3 Fig. 8, on stove seat 1 be equipped with air inlet 11, in chamber a be equipped with can be to up-draught heat dissipation blow Wind apparatus 7 is equipped at least one ventilation hole 12 being connected to the chamber a and the ventilation hole in the upper surface of stove seat 1 12 outlet air ends are located at 4 lower section of oil drain pan.

There is the recess 44 being downwardly concaved, the ventilation hole 12 there are several and setting to exist in 4 upper surface of oil drain pan The bottom of recess 44.

Heat dissipation blowing device 7 is fan, that is, aerofoil fan and conventional fan etc..

Secondly, each ventilation hole 12 outlet air end be equipped with ventilating duct, and between ventilating duct and oil drain pan bottom there are Gap.

The gap of setting further improves radiating efficiency for the flowing space of air-flow.

Ventilation hole is distributed in the periphery of heating tube.

Secondly, ventilation hole surrounds to form a circle, and the vertical positioning sleeve surrounds to form a circle and surround to form a circle Ventilation hole, which is located at, to surround on the inside of the vertical positioning sleeve to form a circle.

The operation principle of the present embodiment is as follows：

Brochette is inserted into the roasting label jack 53 of brochette loop bar 5；

Start and rotates synchronously driving mechanism 6,5 uniform rotation of brochette loop bar at this time；

Heating tube 2 is powered, and heat is baked brochette；

During roasted, grease is wandered along horizontal outage 54 and annular gear oil convex body 51 to oil drain pan 4；

It carries heat to grease, and oil drain pan 4 is caused to be heated up, at this point, heat dissipation blowing device 7 is opened, by the external world Air-flow is sucked into chamber, and heat friendship is carried out with the heat for rotating synchronously the generation of driving mechanism 6 first into the indoor air-flow of chamber It changes, that is, give synchronous rotation 6 radiating and cooling of driving mechanism；

Meanwhile the air-flow after heat exchange is then discharged from ventilation hole 12 upwards, oil drain pan 4 drops in the air-flow of discharge Temperature.

When the grease oil level in oil drain pan 4 is higher, tubular transparent shield 3 is dismantled at this time, then by 4 He of oil drain pan Brochette loop bar 5 is held together, finally topples over the grease in oil drain pan 4.

By the way that the oily location structure of axial gear is arranged, the effect of gear oil and water conservancy diversion not only may be implemented, but also can rise To the technical issues of preventing brochette loop bar 5 from falling off.

The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.

Claims

1. a kind of oven includes the stove seat (1) with chamber (a), the heating tube (2) being vertically arranged is equipped on stove seat (1) With the tubular transparent shield (3) being set on the outside of heating tube (2), which is characterized in that be equipped with above the upper surface of stove seat (1) There are gaps between the oil drain pan (4) and oil drain pan (4) that are sleeved on the outside of heating tube (2) and stove seat (1) upper surface, in oil drain pan (4) interior bottom is equipped with several spaced vertical positioning sleeves (41), is equipped with respectively in each vertical positioning sleeve (41) roasting It goes here and there and loop bar (5) and is equipped with axial gear oil location structure, the brochette set between brochette loop bar (5) and vertical positioning sleeve (41) Bar (5) connect with driving mechanism (6) is rotated synchronously, and air inlet (11) is equipped on stove seat (1), equipped with can be in the chamber (a) The heat dissipation blowing device (7) of up-draught, the upper surface of stove seat (1) be equipped with it is at least one be connected to the chamber (a) lead to Air holes (12) and described ventilation hole (12) outlet air end are located at below oil drain pan (4).

2. oven according to claim 1, which is characterized in that the oily location structure of axial gear includes vertical positioning The convex positioning region (42) for covering (41) inner wall is equipped with the oily convex body (51) of annular gear, in brochette loop bar in the upper end of brochette loop bar (5) (5) lower end is socketed with tubular positioning body (52), and the outer diameter of convex positioning region (42) is more than the internal diameter of convex positioning region (42), cylinder The outer diameter of shape positioning body (52) is more than the internal diameter of convex positioning region (42), and it is convex that the convex positioning region (42) is located at annular gear oil Between body (51) and the upper end of tubular positioning body (52).

3. oven according to claim 2, which is characterized in that described brochette loop bar (5) upper end is equipped with and is vertically arranged Roasting label jack (53), the horizontal oil extraction being equipped with roasting label jack (53) vertical connection is kept off on oily convex body (51) in annular Hole (54).

4. oven according to claim 2, which is characterized in that the synchronous rotation driving mechanism (6) includes fixing Positioning plate (61) in chamber (a) is equipped with several and described tubular positioning body (52) one-to-one correspondence on positioning plate (61) Drive shaft (62), pass through gear transmission structure engagement connection, at least a drive shaft between adjacent two drive shafts (62) (62) it connect with driving device, is connected by clutch transmission structure between the tubular positioning body (52) and drive shaft (62).

5. oven according to claim 4, which is characterized in that the lower end of the heating tube (2) stretches to chamber (a) It is interior and be fixed on positioning plate (61) by plug-in bindiny mechanism.

6. oven according to claim 5, which is characterized in that the plug-in bindiny mechanism includes that setting is positioning The power supply base (81) at plate (61) center, sets that there are two the positioning through hole that are mutually parallel on power supply base (81), each fixed It is equipped with upper end for electrical prongs (82) and positioning through hole respectively in the through-hole of position and for forming ring between the upper end of electrical prongs (82) Shape space is equipped with the cooperation cylindrical body (83) being sleeved on power supply base (81) in the lower end of heating tube (2), in cooperation cylindrical body (83) two are equipped in described for the one-to-one tubular grafting set (84) of electrical prongs (82), the tubular grafting set (84) it inserts in annular space and is sleeved in electrical prongs (82).

7. oven according to claim 5, which is characterized in that the oily convex body (51) of annular gear is circumferentially with inclination Down-set inclined surface (511).

8. oven according to claim 1, which is characterized in that the oil drain pan (4) and vertical positioning sleeve (41) is logical Casting is crossed to be integrally formed.

9. oven according to claim 1, which is characterized in that described oil drain pan (4) upper surface, which has, to be downwardly concaved Recess (44), the ventilation hole (12) has the bottom of several and setting in recess (44).

10. oven according to claim 9, which is characterized in that described oil drain pan (4) center is equipped with and oil drain pan (4) the integrally formed interfix set (43) of casting, interfix set (43) are sleeved on the lower end of heating tube (2).