CN105659030A - Pyrolytic oven with improved cooling - Google Patents

Abstract

The invention relates to an oven for household use, wherein the controls provided on the front control panel are protected against high temperatures by a ventilation system. The latter comprises a cooling air channel supported by shape coupling with the panel where the cooling air inlet and outlet apertures are located.

Description

There is the pyrolysis oven of the cooling performance of improvement

Specification sheets

The present invention relates to a kind of retort furnace being furnished with ventilation cooling system.

Before starting to describe, it is worth being pointed out that, hereafter describing and the general stove used with reference to family in claim: but, this is not considered as a limiting factor, because the stove of other application that the principle of the present invention is also applicable in compatible occasion except family expenses, any to be used.

In addition, the present invention is applicable to the stove of the integral part as bigger household electrical appliance (such as gas kitchen ranges), and the independent stove that can embed in cabinet or kitchen structure

It is well known that in the stove that can reach high temperature (up to 500-550 DEG C), such as, perform the stove of pyrolysis cyclical, include the system for cooling those elements, otherwise, the integrity of these elements and reliability may be subject to the damage of thermal stresses.

This kind of situation is mainly such as electrically and/or electronic component, such as unicircuit, semi-conductor, photorectifier, indicating meter, telltale, electric contactor, switch etc.: in fact, these elements at high temperature deteriorate, it is thus desirable to use special material and technical solution, thus cause cost higher.

Alternately, in order to overcome this kind of situation, it is well known that provide above-mentioned cooling system for stove.

For this reason, owing to being generally positioned on control panel by the electric and/or electronic component that thermal stresses is the most responsive, so ventilation hole is disposed near control panel, allowing cooling air to come in and go out, cooling air circulates by fan.

This kind of situation of prior art has been done good description and diagram by U.S. Patent number 4,601,279 (authorizing Guerin), also explains the operation of stove, and wherein cooling system described above is arranged on the part above retort furnace.

This United States Patent (USP) additionally provides the comment about prior art, and it has been instructed and how to utilize cooling draught overheated because of the high temperature of stove to prevent electronic component.

Although from general viewpoint, it suffices to say that, the stove being known in the art can provide necessary cooling performance, but its structure still seems there is weak point.

In fact, cooling air is sucked by the hole being arranged between fire door and stove control panel and is externally discharged.

For this reason, the structure of stove comprises inlet mouth and/or is arranged on the exhaust-duct at retort furnace top.

This passage is normally made up of metal sheet, and is fixed on retort furnace by screw or analogue.

Therefore, it stands different thermal expansions relative to retort furnace passage, causes mechanical stress, and in life-time service process, this mechanical stress may damage the stability of the connection of the structure of passage and itself and retort furnace.

In addition, in U.S. Patent number 4,601,279, this kind of impact arranges further expansion by this kind, and this setting is, this air passageways is placed on this retort furnace completely, causes maximum heat exchange.

As a result, the cooling performance of electronic component is very poor or affected by this kind of configuration at least partly: consequently, it is desirable to improve this kind of situation of prior art.

Therefore, according to the present invention, its technical problem is, it is provided that a kind of stove, wherein, cooling system can provide better properties in thermodynamics and structure, thus overcomes above-mentioned shortcoming of the prior art.

The thought of head it off is to provide the cooling air channels being associated with furnace structure, it is preferable that connect (shapecoupling) by least one shape, to comply with the different heat expansion relative to this retort furnace.

In addition, according to a possible embodiment, the horse of this passage and stove not surface in contact between room connected and reduce by this shape.

The feature of the stove according to the present invention is specifically recorded in the claim book being additional to this specification sheets; According to stove illustrated in following accompanying drawing preferably but the description of non-limiting example, the effect of these features and generation thereof, and the advantage obtained by the present invention will become more obviously, wherein:

Fig. 1 is the front panel of the stove according to the present invention and the axonometric drawing of passage, and its parts can be dismantled each other;

Fig. 2 is the side-view of door and passage in Fig. 1;

Fig. 2 a illustrates the details enlarged view of Fig. 2;

Fig. 3 shows the side-view of the variant of the passage in front panel and earlier drawings, and it is mounted to the horse not room of the stove according to the present invention;

Fig. 3 a illustrates the details enlarged view of Fig. 3;

Fig. 4 is the sectional view of front panel in Fig. 3, passage and horse not room line A-A along Fig. 5;

Fig. 4 a illustrates the details enlarged view of Fig. 4;

Fig. 5 is the top view of this horse not room, has the front panel in earlier drawings and passage.

With reference to accompanying drawing listed above, label 1 entirety represents the front panel of the stove according to the present invention, and it comprises the framework 2 around fenestra 3, and is suitable for holding the top 5 of control panel.

Door is also associated with front panel 1, and for closing fenestra 3, for the purpose of simple, this door is not shown in the drawings.

In the region intermediate of the front panel between described fenestra 3 and top 5, there is the ventilation hole 8 for cooling system.

In the present embodiment, ventilation hole 8 has rectangular shape and arranges along two horizontal row; Favourable, at least there is the curved edge 8a outstanding to the inside of stove in the hole 8 of upper row.

This projecting edge 8a obtains by the metal sheet of the front panel 1 of cup-shaped this stove of extruding, or is obtained by other appropriate means, depends on the material of this front panel.

In addition, corresponding lug 8b extends in a cantilever fashion from the edge 8a in the hole 8 of upper row, it is intended to for supporting the path 10 of cooling air.

Being configured to of path 10: time in terms of top, roughly sees fan, and its front portion is substantially equally wide with the front panel 1 of stove, then posteriorly narrows, and the fan that wherein ventilates (owing to itself is known, therefore not shown) is accommodated in wherein.

As shown in drawings, path 10 has hollow body, at an upper portion thereof, has the hole 11 installing ventilation fan, and has outstanding pedestal 12 in bottom downwards; Can selection of land, providing holes 13 in described pedestal 12, for being fixed to horse not room 20 of stove by screw by this passage.

As shown in drawings, the thickness of path 10 reduces forward, causes its profile to attenuate gradually in direction, air port 15 to going out.

Before first, annex 16 is placed on fire door 1, extends from going out air port 15 in cantilever fashion, also has the two horizontal annex 17 adjacent with same door;The function of described annex 16,17 will illustrate below further.

In this respect, it is necessary to be pointed out that, annex 16,17 is also present in Fig. 3, Fig. 3 a, in the variant embodiment of the path 10 shown in Fig. 4, Fig. 4 a, in variant embodiment, also comprises the blast inlet 18 being positioned at below air port the difference is that it with preceding embodiment.

Blast inlet 18 allows path 10 to suck air from the environment stove, and therefore, its temperature is by lower than the air themperature from horse not room 20.

Therefore, this variant provides better cooling performance because, except by air from horse not room discharge except, it can from outside atmosphere suction temperature lower than the air of in-furnace temperature.

Implementing in variants at these two of the present invention, the annex 16 and 17 of path 10 engages with described fire door 1 in front portion, therefore make the hole 8 of fire door and path 10 go out air port 15 and blast inlet 18 (if existence) aligns.

For this reason, it is necessary to point out, the lug 8b outstanding from the edge 8a in hole 8 engages with the inwall of path 10, and correspondence goes out the diapire in air port 15, and (Fig. 4 a), thus completes the connection of the shape between passage and fire door 1, prevents passage to be lifted.

In this framework, it is also important to note that, the annex 16 relatively going out air port 15 extension in a cantilever fashion is placed on the fenestra 3 of front panel 1, thus prevents path 10 from moving down.

According to a preferred embodiment, the body of path 10 is made up of two half-unit or two halves shell (top part and lower section part), links together along trip edge 21; Joint along edge 21 can make the metal sheet (this passage is preferably made up) of path 10 of metal sheet and advantageously obtain by riveted joint.

Utilizing the present invention, its characteristic reduces production cost except contributing to, and guarantees the good tolerance to pyrolysis oven high temperature, and its characteristic also allows easily to be formed for reinforcing and the interval protuberance 23,24 of stable channel structure.

This kind of protuberance obtained by cup-shaped extruding metal sheet has circular contour, and keep the distance between the two halves assembled, form channel body, also it is used as the shim member of metal sheet thermal expansion, therefore, it is possible to reduce suffered by material due to stove working temperature caused by mechanical stress.

Because the shape of pedestal 12 makes channel bottom have circular contour, so the compensation of thermal expansion is also provided by pedestal 12, the horse that wherein this path 10 is placed in stove by this pedestal is not on room.

Favourable, horse not also has outstanding relief 30 in room 20, and during installation, the pedestal 12 of path 10 is placed on it.

In the above description, it is possible to understand that how furnace construction shown in this article solves technical problem that the present invention mentions.

In fact, the electronic component on furnace structure in the top 5 of fire door 1 or above door is flowed into via hole 8 by relative stove front panel 1 and/or the air that flows out is cooled.

In practice, it suffices to say that, enter via path 10 and eliminate the heat from horse not room via going out air air port 15 and hole 8 discharged, prevent heat to be delivered to the electronic component of the control panel being positioned at stove front panel top 5 by conduction and convection.

Path 10 can also prevent the direct radiation between the top 5 of horse not room 20 and front panel 1, therefore also prevents the heat exchange of this kind of form. Finally, in a kind of stove variant, the stream of ambient air sucked from outside is by blast inlet 18 admission passage 10, outside air cools this system further, therefore, in this case, path 10 is in fact a kind of element, and it can be provided the obstruct from the horse not heat transmitted by conduction, convection current and radiation of room.

In fact, with regard to the heat of conduction, it suffices to say that, not it is subject to the restriction of this kind of setting by the heat part being delivered to path 10 in room 20 from horse, this setting is, its contact area therebetween is made up of relief 30 and pedestal 12.

In other words, the bottom of passage is not exclusively placed in horse not on room, because the part (i.e. pedestal 12) only having this surface is in contact with it; Therefore, thermal conduction only affects the sub-fraction of this channel bottom.

As for convection current, it is necessary to be pointed out that, the stove being provided with horse not room 20 and path 10 has containment structure (because itself is known, so not shown), and wherein, when stove heat, air is tending towards rising also and path 10 carries out heat exchange.

This kind of heat is dissipated by flowing through the ambient air of passage, similar to the horse heat that not room 20 radiates, during the cleaning pyrolysis cyclical of stove, it is possible to reach higher value.

In addition, owing to path 10 is positioned in horse not on room 20 and front panel 1, it is possible to the different heat expansion that compensation work produces during circulating.

Therefore, operation according to the stove of the present invention is reliable.

Claims (10)

1. a stove, comprise horse not room (20), wherein surround into by multiple wall and hot plate chamber, the outside atmosphere fluid communication of passage (10) and described stove, cooling air flow passage is provided, front panel (1,2,5) described horse it is arranged on not before room (20), it is characterized in that, described passage (10) is connected by shape and is fixed to described front panel (1,2,5) and described horse not at least one in room (20).

2. stove according to claim 1, wherein, described passage (10) comprises the hollow body with outlet (15), it is coupled to described front panel (1 at described hollow body, 2,5), time, described outlet is arranged side by side to the corresponding hole (8) being arranged on described front panel.

3. stove according to claim 1 and 2, wherein, air-flow flows to about described passage (10) and/or flows out.

4. stove according to claim 3, wherein said passage comprises the entrance for the air from the environment outside described stove (18).

5. stove according to aforementioned arbitrary claim, wherein, described front panel (1,2,5) has the lug (8b) or similar outstanding element that engage with described passage (10).

6. stove according to aforementioned arbitrary claim, wherein, described passage (10) has annex (16,17), described annex (16,17) and described front panel (1,2,5) engage, connected by shape and fix described front panel.

7. stove according to aforementioned arbitrary claim, wherein, described passage (10) comprises interval protuberance (24,25), is suitable for keeping the parts of channel body in predetermined distance.

8. stove according to aforementioned arbitrary claim, the described hollow body of wherein said passage (10) substantially by two half portion arranged side by side peripherally trip edge (21) be bonded together.

9. stove according to aforementioned arbitrary claim, wherein, described passage (10) has and is placed in described horse not pedestal (12) on room (20), described pedestal is not given prominence to room from described horse, and there is surperficial extension portion, when overlooking, it is less than the extension portion of described passage.

10. stove according to claim 9, wherein said horse not room (20) comprise relief (30) at an upper portion thereof, described passage (20) is placed in described relief (30).