CN213248546U - Smoke-proof cooling system of oven - Google Patents

Abstract

The utility model relates to a grease proofing cigarette cooling system of oven, it includes in the cavity that the bottom plate lower part of oven formed, arrange forced air cooling passageway, ventilation blower in the cavity and be used for surveying the temperature sensor of bottom plate temperature. Two ends of the air cooling channel extend out of the furnace body, and one end of the air cooling channel is matched with the ventilator. The temperature sensor is connected with a control box of the oven and used for realizing the purpose that the ventilator can be controlled to start when the bottom plate reaches the preset temperature, and air is sent into the air cooling channel. This scheme can realize showing the purpose that reduces the bottom plate temperature, and can prevent effectively that substances such as the grease or the coating on the bottom plate from burning and generating the phenomenon of black cigarette and appearing, helps guaranteeing the bright and fresh of baking food color and luster, does not have roast burnt flavor, promotes the taste and guarantees the health of baking food to reduce the pollution degree because of the barbecue action causes the air.

Description

Smoke-proof cooling system of oven

Technical Field

The utility model relates to a barbecue device, in particular to a cooling system which can be applied to an oven and can effectively prevent oil smoke from being generated in an oven chamber.

Background

An oven, also called as a baking oven, an oven, a baking oven, is a device for baking and cooking food by hot air. Ovens are generally of closed or semi-closed construction, heated with hot air in an open configuration, known as grilling. An oven may also be used to generally refer to a device for high temperature processing with hot gases. Traditional ovens use wood, coal combustion heating, and at present, some ovens use electric or natural gas heating. The oven is divided into a single-layer type, a double-layer type and a three-layer type, each layer is independently controlled, and can be used simultaneously or used for single-layer and single-layer baking, and an automatic constant temperature system is generally arranged. The oven is divided into horizontal type and vertical type. Most of the existing ovens are provided with an electric cabinet (or called a control box) which is connected with electrical equipment, sensing equipment and the like and is used for setting time, temperature threshold values and the like.

When the oven is used for preparing food, a hanging bracket or a hanging rack for the food to be roasted is arranged on or in the heat source, the appearance of the food is roasted by the high temperature formed by the heat source, and the heat is conducted by the hanging bracket or the hanging rack to uniformly act on the food, and the temperature required for roasting is generally between 200 and 300 degrees and even higher. The specific structure of gallows or stores pylon can refer to following patent, and its patent number is respectively: ZL2015101804584, ZL2016209952724, ZL2017215977865, ZL2017103175726 and ZL 2019209284115. The food can be heated more uniformly along with the rotation of the hanging bracket or the hanging rack. The hanger or the hanger is generally made of metal with good thermal conductivity. The selection of the specific style of the hanging bracket or the hanging bracket is specifically selected according to the size, the type and the like of the food to be roasted. The hangers or hangers disclosed in the aforementioned patents are only some embodiments of the prior art. The aforementioned patents relate to ovens including charcoal-fired ovens, electric ovens and carbon-electric dual-purpose ovens.

In the baking process of the food, oil, seasonings and the like are generally required to be brushed on the outer surface, and part of oil is separated out in the baking process of the meat food. The oil dripping from the food can fall on the bottom plate of the oven cavity, and because the temperature of the bottom plate of the oven cavity can reach 500 to 600 ℃, the grease, seasonings and the like falling on the plate surface can reach the ignition point immediately. Meanwhile, because the oxygen content in the oven cavity is low, grease, seasoning chips and the like cannot be sufficiently combusted, black smoke is generated during combustion, so that not only can food be burnt and smoked, but also carcinogens in the smoke can be attached to the surface of the food, and particularly for a relatively closed oven, the above adverse situation is more prominent. In consideration of the manufacturing efficiency, the sealing of the oven chambers of most ovens is generally tight, and the generated harmful substances such as black smoke and the like cannot be discharged outside the ovens in time, which becomes a factor seriously restricting the health and the taste of food.

In order to solve the above mentioned problem caused by black smoke generated by burning grease, perfume and other substances falling on the bottom plate of the oven cavity, the patent document ZL2015101804584 discloses a solution in which a water circulation system is provided to cool the bottom plate of the oven cavity. Under the scheme that aforementioned patent is disclosed, because of the heat transfer water for a long time with the bottom plate circulation contact heat transfer of high temperature, reach the temperature that generates the incrustation scale fast easily, get into the boiling state, there is the pipeline that leads to water circulating system easily to block up, the maintenance is frequent, influences the problem of normal use and during the long time use at later stage cooling effect relatively poor problem.

SUMMERY OF THE UTILITY MODEL

The utility model provides a grease proofing cigarette cooling system who uses on oven, it can prevent to drop on the furnace chamber bottom plate that grease, scribble material piece and wait the material burning and generate black cigarette, helps guaranteeing that the color and luster of baking food is delicious, does not have the roast flavor of scorching, and the taste is good and more healthy, helps improving the pollution situation because of the barbecue action causes the air.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a grease proofing cigarette cooling system of oven, includes in the cavity that the bottom plate lower part of oven formed, arrange air-cooled passageway and ventilation blower in the cavity. Two ends of the air cooling channel extend out of the furnace body, and one end of the air cooling channel is matched with the ventilator. And starting the ventilator to operate, so that the ventilator can continuously feed air flow into the air-cooled channel, and the air flow flows along the air-cooled channel and is finally discharged from the other end port of the air-cooled channel. Some embodiments may be provided with a temperature sensor for detecting the temperature of the base plate, the temperature sensor being connected to a control box of the oven to control the ventilator to start and maintain operation when the base plate is detected to reach a predetermined temperature, while the air flow is continuously supplied to the air-cooled duct. The temperature sensor feeds back the detected temperature value of the bottom plate to a control circuit in the control box in real time, and when the temperature of the bottom plate reaches or exceeds a preset value, the control circuit can make a feedback instruction, so that a power supply circuit of the ventilator is conducted, and the ventilator is electrified to operate.

Therefore, the starting of the ventilator can be completed by manual operation (at this time, a control circuit of the control box can contain a timing reminding or alarm reminding circuit module, or the time point of starting the ventilator is estimated purely by an operator according to experience), or can be automatically started by the aid of a control circuit connected with a temperature sensor. It should be noted that the ventilation fan sends the air flow into the air-cooled passage, including the implementation of sending the air flow into the air-cooled passage mainly, and also including the implementation of pumping out the air in the air-cooled passage so that the external air flows into the air-cooled passage passively.

The air cooling channel is arranged between the part in the cavity and the opposite surface of the bottom plate, heat can be transferred through contact, the heat of the bottom plate is transferred into the air cooling channel, and the air flow flowing into the channel is taken out of the oven. In some embodiments, a side wall surface of a part of the air-cooled channel in the cavity facing the bottom plate can be replaced by a lower end surface of the bottom plate, that is, a side wall surface of the air-cooled channel is formed by a surface of the lower end surface of the bottom plate corresponding to the cavity channel of the air-cooled channel.

If the humidity of the air around the oven is high, an assembly structure for drying the air in advance can be arranged at the upstream end of the ventilator.

The cross section of the air cooling channel in the cavity under the bottom plate can be square ring, circular ring or special ring, so that the contact area between the corresponding surfaces of the air cooling channel and the bottom plate is as large as possible, the wall thickness of the air cooling channel can be uniform or different, the wall thickness of the air cooling channel facing one side of the bottom plate can be relatively thin, the purpose is to transfer heat into the air cooling channel to be brought out by air flow as much as possible, and the heat dissipation capacity of the air cooling channel in the cavity is reduced as much as possible.

In some embodiments, a slot structure or a heat-dissipating fin structure may be disposed on the wall of the cavity to facilitate dissipation of heat dissipated into the cavity.

When the oven starts to bake food, the oven does not reach a certain temperature, and needs to be heated continuously, so that not only can the grease in the meat-quality food material not be baked out, but also the temperature of the bottom plate is very low, and even if the grease or coating materials and other substances fall on the upper end surface of the oven, the grease or coating materials and other substances cannot be burnt. The temperature preset for controlling the start of the ventilator should be less than the burning point of the grease and paint. Along with the continuous heating of oven, the temperature of bottom plate can rise gradually, when reaching preset temperature value (can be interval value), just control the ventilation blower through the control box and start, and constantly send into cold air in the forced air cooling passageway. The air after heat exchange with the bottom plate is sent out of the oven from the other end of the air cooling channel. The air cooling channel is contacted with the lower end surface of the bottom plate to absorb heat from the bottom plate to cool the bottom plate. The upper end face of the bottom plate is formed with a certain inclination, and the lower side is provided with an oil leakage hole, so that the grease falling on the oil leakage hole flows to the lower side and flows out of the oil leakage hole to fall on the ground or fall in an oil receiving groove arranged at the lower part of the oven.

The number of the temperature sensors can be one or more, when the number of the temperature sensors is multiple, the temperature sensors are distributed at different positions of the bottom plate, and particularly the temperature sensors are arranged near the bottom plate which is in contact with the tail end of the part, arranged in the cavity, of the air cooling channel, because the temperature reduction effect on the bottom plate is relatively poor near the bottom plate.

In a specific embodiment, the ventilator is selected as a pipeline fan, and air flow with certain internal pressure is sent to the air cooling channel by the pipeline fan, so that heat conducted from the bottom plate is quickly taken out of the oven, and the purpose of better cooling the bottom plate is achieved. And the pipeline fan also has the advantages of small volume, simple and convenient installation and low noise.

In a specific embodiment, the ventilator further comprises a temperature setting knob, the temperature setting knob can set a plurality of temperature levels, and when the temperature sensor detects that the temperature of the bottom plate reaches a certain set temperature level, the ventilator can be controlled to start.

In a specific embodiment, a hanging bracket for hanging food is arranged in an oven cavity of the oven, and after the food is hung on the hanging bracket, a lower opposite area of the hanging bracket is projected on a bottom plate. The air cooling device is characterized in that the air cooling channel arranged in the cavity below the bottom plate corresponds to the position right below the hanging bracket, and the outer edge of a contact contour formed between the air cooling channel and the bottom plate can cover the whole lower opposite area of the hanging bracket.

The range of the so-called hanging bracket lower pair area is defined as the maximum projection area projected on the bottom plate after the hanging bracket is full of food, namely the projection area projected on the bottom plate after the hanging bracket of the oven is full of the maximum volume of food which can be carried by the oven cavity. Generally, the hanger is annular, and when the hanger is full of food, the projection section projected on the bottom plate is annular, and the lower opposite area of the hanger is annular, accordingly, the contact contour formed between the air cooling channel and the bottom plate can be annular, or can be planar, as long as the contact contour between the air cooling channel and the bottom plate can basically cover the lower opposite area of the hanger.

In the specific implementation mode, the oven is a carbon-fired oven, a carbon baking group is arranged at the center of a bottom plate of the oven, the part of the carbon baking group is arranged below the bottom plate, and the part of the carbon baking group is arranged above the bottom plate. The air cooling device is characterized in that a part of the air cooling channel arranged in the cavity below the bottom plate surrounds the periphery of the part of the carbon baking group arranged below the bottom plate.

In a specific embodiment, a heat-conducting fin plate is arranged in an inner cavity of the air cooling channel. The heat conduction fin plates can be arranged in parallel, and the direction of a gap formed between every two adjacent heat conduction fin plates is consistent with the flow direction of the air flow.

In a specific embodiment, the air cooling channel is made of a heat insulating material, and a heat conducting plate is embedded on one surface of the air cooling channel, which faces the bottom plate, and is in contact with the bottom plate. Furthermore, a heat conduction fin plate is arranged on the heat conduction plate, one end of the heat conduction fin plate extends into the bottom plate, and the other end of the heat conduction fin plate extends into the air cooling channel.

In a specific implementation mode, a plurality of lower spoilers arranged at intervals and a plurality of upper spoilers arranged at intervals are distributed in the air cooling channel along the airflow direction, and the lower spoilers and the upper spoilers are sequentially and alternately arranged. The upper end of the lower spoiler extends upwards to the upper part of the lower end of the upper spoiler. The convex cambered surface of the lower spoiler faces the blowing direction of the airflow, and the concave cambered surface of the upper spoiler faces the blowing direction of the airflow. By means of the flow blocking effect of the upper and lower flow blocking pieces, the air flow can realize upper and lower convection and uniform mixing when flowing in the air cooling channel, so that a better heat exchange effect is realized.

In a specific implementation mode, water circulation pipelines are distributed in the inner cavity or on the outer wall of the air cooling channel, and two ends of each water circulation pipeline are connected with a water circulation assembly outside the oven. The water circulation pipeline can be correspondingly arranged on the section of the air cooling channel arranged in the cavity and the section extending to the outer part of the oven, the water circulation pipeline can also be correspondingly arranged on the whole section of the air cooling channel arranged in the cavity, can also be correspondingly arranged on a certain section of the air cooling channel arranged in the downstream of the cavity, and even can be correspondingly arranged on a certain section of the air cooling channel extending to the outside of the oven at the downstream end. With the help of the water circulation pipeline, the hot air in the air cooling channel is cooled, so that on one hand, the heat energy can be recycled, on the other hand, the discharged air can be cooled to a certain degree, and the temperature around the oven (kitchen) is reduced.

In a specific embodiment, the air-cooling channel is divided into two parts, one of the two parts comprises a first air feeding channel and a first air discharging channel, the other part comprises a second air feeding channel and a second air discharging channel, and the air outlet end of each air feeding channel is correspondingly connected with the air inlet end of the corresponding air discharging channel. The first air feeding channel and the second air feeding channel are oppositely arranged in the cavity to form a whole cooling channel, wherein the air inlet end of the first air feeding channel and the air inlet end of the second air feeding channel are positioned on the same side, and the air inlet end of the first air feeding channel and the air inlet end of the second air feeding channel are positioned on the same side and are opposite to the air inlet end of the first air feeding channel. If the first air feeding duct and the second air feeding duct are combined into a single ring structure, the flow direction of the fed air flow in the first air feeding duct and the flow direction of the fed air flow in the second air feeding duct are opposite, namely, the flow direction of one air flow is clockwise, and the flow direction of the other air flow is anticlockwise.

The feeding air channel is arranged above the discharging air channel, so that when air flow enters the corresponding discharging air channel from the feeding air channel, the air flow flows vertically downwards at the joint of the two air channels and then flows along the plane direction, the arrangement can not only avoid the contact between the discharging air channel and the bottom plate, but also increase the vertical distance between the discharging air channel and the bottom plate.

In specific implementation, at least the air outlet duct can be wrapped with an insulating layer so as to reduce the heat dissipation amount to the cavity. In some embodiments, the first air outlet duct and the second air outlet duct may be combined into a channel, and the free end of the channel extends out of the oven. In other embodiments, the first air outlet duct and the second air outlet duct are independent, the first air outlet duct extends out of the oven from the lower portion of the tail end of the second air inlet duct, and the second air outlet duct extends out of the oven from the lower portion of the tail end of the first air inlet duct. The outlet ends of the two outlet air ducts can be combined together or can be independent. In the foregoing embodiment, if the water circulation pipe is provided, the water circulation pipe is generally disposed on the air outlet duct.

The utility model has the advantages that: the scheme of this patent can realize showing the purpose that reduces furnace chamber below bottom plate temperature, and then can prevent effectively that substances such as the grease or the coating that drop on the bottom plate from burning and generating the phenomenon of black cigarette and appearing, helps guaranteeing apparent bright and fresh, the color and luster of baking food, does not have the roast flavor of scorching, promotes the taste and guarantees the health of baking food to reduce the pollution degree because of the barbecue action causes the air. Because the medium that is used for the cooling is the air, need not set up the holding box on the one hand, and make and set up simple structure, cost of manufacture low, on the other hand can not be similar aqueous medium cooling scheme, has the easy incrustation scale that forms in the passageway, causes the passageway to block up, makes the maintenance cost high, easily causes adverse effect's problem to the result of use, uses air medium can not the polluted environment yet.

Embodiments of the present patent provide for faster access to operating temperatures at the beginning of heating the oven cavity, relative to existing water (including other liquid media) cold cooling schemes. Because when water and other liquid media are adopted to cool the bottom plate, the liquid media accumulated at the lower part of the bottom plate can absorb the temperature of the heating furnace chamber along with the bottom plate, and the efficiency of starting the oven can be reduced to a certain extent compared with the air heat exchange media.

Drawings

Fig. 1 is a schematic top view of a first embodiment of the present invention.

Fig. 2 is a schematic top view of a second embodiment of the present patent.

Fig. 3 is a schematic partial cross-sectional view of a third embodiment of the present patent.

Fig. 4 is a schematic partial cross-sectional view of a solution according to a fourth embodiment of the present patent.

Fig. 5 is a schematic partial cross-sectional view of a fifth embodiment of the present patent.

Fig. 6 is a schematic partial cross-sectional view of a sixth embodiment of the present patent.

Fig. 7 is a schematic view of a portion of an embodiment of an air cooling channel in longitudinal (airflow) cross section.

Fig. 8 is a schematic top view of the seventh embodiment of the present patent.

FIG. 9 is a schematic diagram of an embodiment of an air-cooled channel.

FIG. 10 is a schematic diagram of another embodiment of an air-cooled channel.

In the figure: 10 furnace bodies, 20 furnace chambers, 30 bottom plates, 40 oil leakage holes, 50 door openings, 60 carbon baking openings, 70 outer flues, 80 electric baking groups, 90 hanger lower opposite areas, 1 air cooling channel, 1a first air feeding channel, 1b second air feeding channel, 11 partition plates, 12 air feeding pipelines, 13 exhaust pipelines, 13a first air feeding channel, 13b second air feeding channel, 14 heat insulating layers, 2 (pipeline) ventilators, 3 temperature sensors, 4 constant temperature knobs, 5 heat conducting plates, 6 heat conducting fin plates, 7 water circulating pipelines, 8 lower flow blocking pieces and 9 upper flow blocking pieces.

Detailed Description

The drawings in the specification show the structure, ratio, size, etc. only for the purpose of matching with the content disclosed in the specification, so as to be known and read by those skilled in the art, and not for the purpose of limiting the present invention, so the present invention does not have the essential meaning in the art, and any structure modification, ratio relationship change or size adjustment should still fall within the scope covered by the technical content disclosed in the present invention without affecting the function and achievable purpose of the present invention. Meanwhile, the terms "upper", "lower", "front", "rear", "middle", and the like used in the present specification are for the sake of clarity only, and are not intended to limit the scope of the present invention, and changes or adjustments of the relative relationship thereof are also considered to be the scope of the present invention without substantial changes in the technical content.

A smoke resistant cooling system for an oven disclosed in this patent requires a cavity to be formed in the oven body 10, particularly below the floor 30 of the oven cavity 20. So that the air cooling channel 1 for cooling the bottom plate 30 is correspondingly arranged below the bottom plate. The whole system at least comprises a ventilator 2 (optionally, a pipeline fan) for continuously feeding cold air into the air cooling channel 1, and a temperature sensor 3 for detecting the temperature of the bottom plate 30, wherein the ventilator 2 and the temperature sensor 3 are connected to a control box circuit of the oven, and when the temperature sensor 3 detects that the temperature of the bottom plate 30 reaches a preset temperature value, the control box can make a feedback instruction to start (operate) the ventilator 2 to feed low-temperature air into the air cooling channel 1. Conversely, when the temperature sensor 3 detects that the temperature of the bottom plate 30 is lower than the preset temperature value, the control box can make a feedback instruction to stop the operation of the ventilator 2.

In most embodiments, both ends of the air-cooled duct 1 are disposed at positions extending to the outside of the rear wall of the furnace body 10, the ventilator 2 is installed at one end of the air-cooled duct 1, and the hot air after heat exchange is discharged from the other end of the air-cooled duct 1. One side wall surface of the air-cooled duct 1 facing the bottom plate 30 contacts with the lower end surface of the bottom plate 30 to absorb heat from the bottom plate 30 and cool the same.

In one embodiment, the solution of the present patent may further comprise a temperature setting knob (when understood, the concept includes an operation panel or a touch screen with similar functions), which is capable of setting a plurality of temperature steps, and when the temperature sensor detects that the temperature of the base plate reaches a certain temperature step (currently) set, the ventilator is controlled to start.

In a word, temperature sensor and ventilation blower all are connected to the control box (or called electric cabinet) of oven in this patent, and when the control box received the bottom plate temperature of temperature sensor feedback and reached the default, the control box just can control the ventilation blower and start, and constantly send into the forced air cooling passageway with microthermal air, and the air current of sending into constantly makes the bottom plate obtain the cooling with the bottom plate heat transfer through the in-process of forced air cooling passageway. As long as the temperature value fed back to the control box by the temperature sensor reaches or is higher than the preset value, the control box can control the ventilator to continuously operate. Under the scheme that a plurality of temperature values can be preset to the constant temperature knob, when the temperature value that temperature sensor fed back to the control box reached current predetermined temperature value, the control box just can respond to and make the ventilation blower electrified and operation.

If the ventilator can be set to operate at different rotating speeds, the air supply amount in unit time can be adjusted by adjusting the rotating speed of the ventilator according to needs, the control box can process the signals after receiving the temperature signals fed back by the temperature sensor, and the ventilator is controlled to operate at different rotating speed states according to the interval where the fed-back real-time temperature values are located. For example, when the fed-back temperature value just reaches the range of 20 degrees (or 30 degrees) above the preset value, the control box can control the ventilator to operate at the lowest rotating speed, when the fed-back temperature value reaches the range of 30 degrees above the preset value +20 degrees, the control box can control the ventilator to operate at the medium rotating speed, and so on. When the fed-back real-time temperature value falls back from the range of the higher level to the range of the lower level, the rotating speed of the ventilator is changed to the corresponding rotating speed.

The scheme of this patent can be used for the oven of multiform, like the oven of charcoal oven, electric oven, gas oven and compound heating mode. In addition, the arrangement shape of the air-cooled channel 1 in the cavity under the bottom plate 30 varies according to the suspension way of the food in the oven, such as the shape of the hanging bracket. In general, the arrangement of the air-cooled duct 1 corresponding to the bottom plate 30 of the upper part of the whole cavity is a versatile embodiment (an example is shown in fig. 8). In the following specific examples, corresponding embodiments are presented for a charcoal-fired oven and an electric oven, respectively, to aid in understanding the concepts of the present patent.

When the cooking starts, the cavity 20 is in a heating temperature-raising stage, and at this time, not only the grease in the meat-based food material is not baked out, but also the temperature of the bottom plate is low, and even if substances such as grease or coating materials fall on the upper end surface of the cavity, the cavity will not burn, and the ventilator is stopped. The preset temperature value for controlling the starting of the ventilator can be any value of 50 degrees, 80 degrees, 100 degrees, 130 degrees, 200 degrees and the like or a range around any value, but is smaller than the burning point of grease and paint. Along with constantly heating to the oven, the temperature of bottom plate can rise gradually, and when the bottom plate was heated to the adjacent interval of presetting the temperature in, the control box just can make feedback instruction, is controlling the ventilation blower start-up, begins the operation and constantly sends into low temperature air in the forced air cooling passageway. The low-temperature air enters the air cooling channel, continuously exchanges heat with the bottom plate in the flowing process, the temperature is gradually increased to become high-temperature air, and finally the high-temperature air is discharged to the outside of the oven from the other port of the air cooling channel (the port can horizontally extend outwards for a certain distance relative to the oven body 10, can also extend upwards for a certain height relative to the oven body 10, and can even extend outwards and upwards relative to the oven body 10, and other forms).

The upper end of the base plate of most ovens will be formed with a certain inclination, and the lower side is provided with the oil leakage hole 40, and the side facing the door opening 50 is generally lower. The design is such that the grease falling on it flows towards the lower side and flows out of the oil-leaking hole to fall on the ground or into an oil-receiving groove arranged at the lower part of the oven.

The number of the temperature sensors can be one or more, when the number of the temperature sensors is more than one, the temperature sensors are distributed and arranged at different positions of the bottom plate, and particularly, one temperature sensor is arranged near the bottom plate which is contacted with the tail end of the part, arranged in the cavity, of the air cooling channel, because the temperature reduction effect on the bottom plate is relatively poor near the bottom plate. When the temperature value fed back to the control box by the temperature sensor reaches a preset value, the control box can be prompted to make a feedback instruction, and the ventilator is started.

As shown in fig. 1 and 3, the oven is a charcoal oven. Like most of conventional carbon ovens, a carbon baking group 60 is disposed at the center of the bottom plate 30 of the oven cavity 20, and the carbon baking group 60 is partially disposed below the bottom plate 30 and partially disposed above the bottom plate 30. As shown in the figure, a part of the air-cooled channel 1 arranged in the cavity below the bottom plate 30 is correspondingly surrounded on the periphery of the part of the charcoal-baking group 60 arranged below the bottom plate 30, in the figure, the part of the air-cooled channel 1 forms a square ring, the feeding port of low-temperature air and the discharging port of high-temperature air are correspondingly arranged on the same side (on the rear wall of the furnace body 10), a partition plate 11 is arranged to separate two ports, and the cross section of the part of the air-cooled channel 1 is in a rectangular ring shape.

As shown in fig. 2, 4 and 8, the oven is an electric oven, and the electric oven groups 80 are disposed on the left and right inner walls of the oven body 10 (this is the case with various conventional electric ovens).

As shown in fig. 2 and 4, a part of the air-cooled channel 1 disposed in the cavity below the bottom plate 30 may be formed in a ring shape, a low-temperature air inlet and a high-temperature air outlet are provided on the rear wall of the furnace body 10 (a small distance is allowed between the two ports), and the cross section of the part of the air-cooled channel 1 is in a special ring shape.

As shown in FIG. 8, it is also possible to arrange a part of the air-cooled duct 1 disposed in the cavity below the bottom plate 30 in a plane to be bent back and forth, and in this embodiment, it is possible to cool substantially the entire bottom plate (including the vicinity of the center), and the inlet for low-temperature air and the outlet for high-temperature air are also provided on the rear wall of the furnace body 10.

Under the embodiment of this patent, the part of forced air cooling passageway 1 in placing bottom plate 30 cavity down, its cross sectional shape can be square ring shape, ring form or special-shaped ring shape, make as far as possible to have as far as possible area of contact between this part forced air cooling passageway and the corresponding face of bottom plate to be favorable to the cooling to the bottom plate, and the wall thickness of this part forced air cooling passageway can be even unanimous, also can be distinguished, the wall thickness towards one side of bottom plate can be some relatively thinner this moment, aim at make the heat to the interior transmission of forced air cooling passageway and be taken out by the air current as far as possible, reduce the heat dissipation capacity to in the cavity as far as possible. In some embodiments, a slot structure or a heat-dissipating fin structure may be disposed on the wall of the cavity to facilitate dissipation of heat dissipated into the cavity.

It is not excluded that the cross-sectional shape of the air-cooled duct 1 differs at different sections and that the ventilation equivalent is not uniform.

As shown in fig. 1, 2 and 8, the corresponding oven cavity uses a hanger for hanging food, and the hanger is ring-shaped (see the part of patent scheme shown in the background introduction). After the food is hung on the hanger, a hanger lower counter 90 (dotted line range, annular range shown) is projected on the bottom plate 30. The range of the so-called hanging bracket lower pair area is defined as the maximum projection area projected on the bottom plate after the hanging bracket is full of food, namely the projection area projected on the bottom plate after the hanging bracket of the oven is full of the maximum volume of food which can be carried by the oven cavity. The air cooling channel 1 arranged in the cavity below the bottom plate 30 corresponds to the right lower part of the hanger, and the outer edge of the contact contour formed between the part of the air cooling channel and the lower end face of the bottom plate can cover the whole lower opposite area 90 of the hanger.

The hanger is generally annular, when the hanger is fully hung with food, the projection section projected on the bottom plate is annular, the lower opposite section of the hanger is annular at the moment, the inner ring of the annular projection is influenced by the outer contour of the hanger, and the outer ring is influenced by the (radial) thickness of the food hung outside the hanger. Therefore, as shown in fig. 1 and 2, the contact contour formed between the air-cooling duct and the bottom plate may be formed in a ring shape (square ring or circular ring) or a planar shape as shown in fig. 8. So long as the profile of the interface between the air-cooled channel and the floor is such that the under hanger counter area 90 is entirely contained.

Regarding the area of the bottom plate that needs to be cooled, the range where substances such as grease and the like mainly fall after food is suspended in the oven cavity is mainly considered, generally, only the area (edge line) where the air cooling channel passes is ensured to be outside the range, the side line of the range is basically covered in the range, and the area where the grease flows to the oil leakage hole needs to be covered (a concave part can be arranged on the main air duct so that part of air flow passes through the concave part, and the high part can be included in the main air duct).

As shown in fig. 3 and 4, a heat conducting fin 6 is arranged in the inner cavity of the air cooling channel 1, so that the heat exchange area of air can be significantly increased. The heat-conducting fin plates 6 are arranged in parallel, and the direction of the gap formed between two adjacent heat-conducting fin plates 6 is consistent with the flow direction of the air flow, namely, the air flow can flow between the two heat-conducting fin plates. In the embodiment shown in fig. 3, the air-cooled duct 1 is made of a heat insulating material, and the heat conductive plate 5 is fitted on the surface of the air-cooled duct 1 facing the bottom plate 30 so as to contact the bottom plate 30, thereby achieving heat exchange. In order to increase the heat exchange area, the heat conducting plate 5 is provided with the heat conducting fin plate 6, so that one end of the heat conducting fin plate 6 extends into the bottom plate 30, and the other end extends into the air cooling channel 1. The embodiment illustrated in fig. 3 can reduce the amount of heat dissipated into the cavity.

As shown in fig. 5 and 6, a water circulation pipeline 7 is distributed in the inner cavity or on the outer wall of the air cooling channel 1, and two ends of the water circulation pipeline are connected with a water circulation assembly outside the oven. The water circulation pipeline can directly or indirectly exchange heat with air in the air cooling channel 1, the cooling effect of the bottom plate can be directly improved, or the purpose of reducing the temperature of air around the oven is realized, the adverse effect caused by the high temperature of the initial air sent into the air cooling pipeline and the cooling effect can be indirectly improved.

When the water circulation duct 7 is provided on the outer wall of the air-cooled duct 1, as shown in fig. 6, an insulating layer 14 may be provided on the outer wall of the water circulation duct 7 in order to reduce the amount of heat radiation of the water circulation duct 7 to the cavity.

When the heat recovery device is applied specifically, the water circulation pipeline can be correspondingly arranged on the section of the air cooling channel arranged in the cavity and the section extending to the outer part of the oven, so that the purpose of heat energy recovery is achieved; the water circulation pipeline can be correspondingly arranged on the whole section of the air cooling channel arranged in the cavity, and is mainly used for the purpose of heat energy recycling; the water circulation pipeline can be correspondingly arranged on a certain section of the air cooling channel arranged at the downstream of the part in the cavity, and even can be correspondingly arranged on a certain section of the air cooling channel extending to the outside of the oven at the downstream end (see figure 8), and is mainly used for reducing the temperature of the air exhausted to the outside of the oven.

In a word, with the help of the hydrologic cycle pipeline that sets up, cool down to the hot-air in the forced air cooling passageway, can realize the recycle to heat energy on the one hand, on the other hand also can cool down exhaust air, reduces the temperature of oven surrounding air, reaches the purpose that improves the operational environment, promotes bottom plate cooling effect.

As shown in fig. 7, a plurality of lower spoilers 8 and a plurality of upper spoilers 9 are distributed in the air-cooled channel 1 along the airflow direction, and the lower spoilers 8 and the upper spoilers 9 are alternately arranged in sequence. The upper end of the lower spoiler 8 extends upward above the lower end of the upper spoiler 9. In specific implementation, the convex cambered surface of the lower spoiler 8 faces the blowing direction of the airflow, and the concave cambered surface of the upper spoiler 9 faces the blowing direction of the airflow.

By means of the flow blocking effect of the upper and lower flow blocking plates 8 and 9, the air flow can continuously realize upper and lower convection when flowing in the air cooling channel, and uniform mixing is carried out, so that a better heat exchange effect is realized. The upper spoiler 9 also functions as a heat-conducting fin. The width of the spoiler may be the same as or smaller than the width of the (air-cooled) channel.

To better achieve a uniform cooling of the bottom plate 30, on the one hand the flow rate of the air flow fed into the air-cooled channel 1 can be accelerated, and on the other hand the following arrangement can be made.

As shown in fig. 9 to 10, the air-cooled channel 1 is divided into two parts, one of which includes a first air feeding channel 1a and a first air discharging channel 13a, and the other includes a second air feeding channel 1b and a second air discharging channel 13b, and the air outlet ends of the air feeding channels 1a and 1b are correspondingly connected with the air inlet ends of the corresponding air discharging channels 13a and 13 b. The first air feeding duct 1a and the second air feeding duct 1b are oppositely arranged in the cavity to form a whole cooling channel, wherein the air inlet end of the first air feeding duct 1a and the air inlet end of the second air feeding duct 1b are located on the same side (generally, the air inlet end is arranged on the rear side of the furnace body). The air inlet end of the first air outlet duct 13a and the air inlet end of the second air outlet duct 13b are located on the same side and opposite to the air inlet end of the air inlet duct (arranged on the front side of the furnace body).

As shown in fig. 9 and 10, the first air feeding duct 1a and the second air feeding duct 1b are assembled into a single ring structure (shown as a square ring), and at this time, the flow direction of the air flow to be fed into the first air feeding duct 1a is opposite to the flow direction of the air flow to be fed into the second air feeding duct 1b, the former flow direction is clockwise as shown in fig. 9, the latter flow direction is counterclockwise as shown in fig. 10, and the latter flow direction is clockwise.

The feeding air channels 1a and 1b are arranged above the feeding air channels 13a and 13b, so that when air flow enters the corresponding feeding air channels from the feeding air channels, the air flow flows vertically downwards at the joint of the two air channels and then flows along the plane direction, the arrangement can not only avoid the contact between the feeding air channels and the bottom plate, but also increase the vertical distance between the feeding air channels and the bottom plate. In specific implementation, at least the air outlet duct can be wrapped with an insulating layer so as to reduce the heat dissipation amount to the cavity.

During specific implementation, a ventilator can be independently arranged at one end of the first air feeding duct 1a, a ventilator is independently arranged at one end of the second air feeding duct 1b, the two ventilators run or stop simultaneously, one ends of the first air feeding duct 1a and the second air feeding duct 1b can also be connected in parallel to an air supply pipeline 12, a common ventilator is arranged at the other end of the air supply pipeline 12, and the ventilation power of the ventilator meets the (maximum) displacement upper limit requirement of the two branches.

As shown in fig. 9, the first air-sending duct and the second air-sending duct are merged into one passage (air exhaust duct 13), and as shown in fig. 9, the air exhaust duct 13 extends from the central position in the width direction of the oven body to the front right and the rear outside the oven. Such an arrangement is generally not well suited for carbon ovens. The carbon oven is provided with an outer flue 70 which, if provided with a water circulation heat exchange line, can be led to a section of the pipeline downstream of the air cooling channel.

As shown in fig. 9, the first air outlet duct 13a and the second air outlet duct 13b are independent, the first air outlet duct 13a extends from the lower end of the second air inlet duct 1b to the right outside the oven and then extends backward, the second air outlet duct 13b extends from the lower end of the first air inlet duct 1a to the left outside the oven and then extends backward, and finally the outlet ends of the two air outlet ducts 13a and 13b are combined together (located at the rear side of the oven body).

In the embodiment shown in fig. 9 and 10, if a water circulation pipe is provided, the water circulation pipe is generally disposed on the outlet air duct 13a, 13 b.

The above embodiments are merely illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. The present invention can be modified in many ways without departing from the spirit and scope of the present invention, and those skilled in the art can modify or change the embodiments described above without departing from the spirit and scope of the present invention. Accordingly, it is intended that all equivalent modifications or changes which may be made by those skilled in the art without departing from the spirit and technical spirit of the present invention be covered by the claims of the present invention.

Claims (10)

1. The utility model provides a grease proofing cigarette cooling system of oven which characterized in that: a cavity is formed at the lower part of the bottom plate of the oven, and an air cooling channel is distributed in the cavity; the two ends of the air cooling channel extend out of the furnace body, one end of the air cooling channel is matched with a ventilator, and the ventilator can send air flow into the air cooling channel during operation.

2. The smoke resistant cooling system of an oven of claim 1, wherein: the temperature sensor is arranged in the cavity and used for detecting the temperature of the bottom plate; the temperature sensor is connected with a control box of the oven and used for controlling the ventilator to be started when the temperature of the bottom plate reaches a preset temperature, and the purpose of conveying air flow in the air cooling channel is achieved.

3. The smoke resistant cooling system of an oven of claim 2, wherein: the temperature sensor detects that the temperature of the bottom plate reaches the currently set temperature range, and the ventilator can be controlled to start.

4. The smoke resistant cooling system of an oven of claim 1, wherein: a hanging bracket for hanging food is arranged in the oven cavity of the oven, and after the food is hung on the hanging bracket, a lower opposite area of the hanging bracket is correspondingly projected on the bottom plate;

the air cooling channel arranged in the cavity below the bottom plate corresponds to the position right below the hanging bracket, and the outer edge of a contact contour formed between the partial air cooling channel and the bottom plate at least can cover the lower opposite area of the whole hanging bracket.

5. The smoke resistant cooling system of an oven of claim 1, wherein: the oven is a carbon-fired oven, a carbon baking group is arranged at the center of a bottom plate of the oven, and part of the carbon baking group is arranged below the bottom plate and part of the carbon baking group is arranged above the bottom plate; the partial air cooling channel arranged in the cavity below the bottom plate surrounds the periphery of the part of the carbon baking group arranged below the bottom plate.

6. The smoke resistant cooling system of an oven of claim 1, wherein: and a heat-conducting fin plate is arranged in the inner cavity of the air cooling channel.

7. The smoke resistant cooling system of an oven of claim 1, wherein: the air cooling channel is made of a heat insulating material, and a heat conducting plate is embedded on one surface, facing the bottom plate, of the air cooling channel and is in contact with the bottom plate.

8. The smoke resistant cooling system of an oven of claim 1, wherein: a plurality of lower spoilers and a plurality of upper spoilers are distributed in the air cooling channel along the airflow direction, and the lower spoilers and the upper spoilers are sequentially and alternately distributed; the upper end of the lower spoiler is positioned above the lower end of the upper spoiler, so that when the airflow flows in the air cooling channel, the upper spoiler and the lower spoiler can promote the airflow to continuously convect up and down and circularly mix.

9. The smoke resistant cooling system of an oven of claim 1, wherein: and water circulation pipelines are distributed in the inner cavity or on the outer wall of the air cooling channel, and two ends of each water circulation pipeline are connected with a water circulation assembly outside the oven.

10. The smoke resistant cooling system of an oven of claim 1, wherein: the part of the air cooling channel, which is arranged in the cavity, is divided into two branches, wherein one branch comprises a first feeding air channel and a first discharging air channel, the other branch comprises a second feeding air channel and a second discharging air channel, the air outlet end of each feeding air channel is connected with the air inlet end of the corresponding discharging air channel, and the feeding air channel is positioned above the discharging air channel;

the first air feeding channel and the second air feeding channel are oppositely arranged in the cavity to form a whole cooling channel, wherein the air inlet end of the first air feeding channel and the air inlet end of the second air feeding channel are positioned on the same side, and the air inlet end of the first air feeding channel and the air inlet end of the second air feeding channel are positioned on the same side which is opposite to the side where the air inlet end of the air feeding channel is positioned.

Images