CN112168003A - Exhaust structure for cooking device and oven with same - Google Patents
Exhaust structure for cooking device and oven with same Download PDFInfo
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- CN112168003A CN112168003A CN202010888481.XA CN202010888481A CN112168003A CN 112168003 A CN112168003 A CN 112168003A CN 202010888481 A CN202010888481 A CN 202010888481A CN 112168003 A CN112168003 A CN 112168003A
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- exhaust
- air inlet
- air
- mounting plate
- air guide
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/0623—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
- A47J37/0629—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity with electric heating elements
- A47J37/0641—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity with electric heating elements with forced air circulation, e.g. air fryers
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- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
- A47J37/00—Baking; Roasting; Grilling; Frying
- A47J37/06—Roasters; Grills; Sandwich grills
- A47J37/0623—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity
- A47J37/0629—Small-size cooking ovens, i.e. defining an at least partially closed cooking cavity with electric heating elements
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- Engineering & Computer Science (AREA)
- Food Science & Technology (AREA)
- Baking, Grill, Roasting (AREA)
- Cookers (AREA)
Abstract
The invention relates to an exhaust structure for a cooking device and an oven with the structure, which comprises an inner container with an exhaust port and an exhaust channel which is arranged above the inner container and is provided with an exhaust fan, wherein the inner container is provided with the exhaust port and the exhaust channel is provided with an air inlet. Compared with the prior art, the invention can control the exhaust speed of the inner container through the opening and closing of the first air guide channel and/or the second air guide channel, and further can regulate and control the exhaust speed of the inner container according to the baking requirement, so that the humidity in the inner container is kept at a certain level, and the baking effect is further improved.
Description
Technical Field
The invention relates to the field of cooking devices, in particular to an exhaust structure for a cooking device and an oven with the exhaust structure.
Background
The oven is a cooking device for heating and baking food by using a built-in heating device (such as a heating pipe, a hot air blower and the like), and hot gas (containing certain steam) generated in an inner container in the cooking process enters an exhaust passage and is discharged outside. Existing ovens typically have only one fixed exhaust port, for example: the oven structure is disclosed by Chinese invention patent with the application number of ZL201810480440.X (with the publication number of CN110495792A), Chinese invention patent with the patent number of ZL201621238940.5 (with the publication number of CN206651749U) and the like.
However, different food materials have different requirements for humidity, and some food materials have different requirements for humidity in different stages of baking, for example, when food such as French bages and pig trotters is baked, certain humidity needs to be maintained in the former stage, and the exhaust speed is required to be slow, and when food is colored in the latter stage, the exhaust speed is required to be fast in order to achieve a crisp surface cooking effect. The existing oven is only provided with one exhaust port with a fixed exhaust area, the exhaust speed is fixed, and the exhaust speed can not be adjusted according to cooking requirements when the food materials are baked, so that the baking effect is influenced, and the use experience of a user is influenced.
Disclosure of Invention
The first technical problem to be solved by the present invention is to provide an exhaust structure for a cooking device with controllable exhaust speed, aiming at the prior art.
The second technical problem to be solved by the invention is to provide an exhaust structure for a cooking device, which can self-feedback regulate and control the exhaust speed according to the internal pressure of an inner container, aiming at the prior art.
The third technical problem to be solved by the present invention is to provide an oven with the above-mentioned exhaust structure.
The technical scheme adopted by the invention for solving at least one technical problem is as follows: an exhaust structure for a cooking device comprises an inner container with an exhaust port and an exhaust channel which is arranged above the inner container and is provided with an exhaust fan, wherein the inner container is provided with the exhaust port, the exhaust channel is provided with an air inlet, and the exhaust port of the inner container is communicated with the air inlet of the exhaust channel through a first air guide channel and a second air guide channel respectively, and at least one of the first air guide channel and the second air guide channel can be opened and closed.
Furthermore, the exhaust speed of the second air guide channel is greater than that of the first air guide channel, and the second air guide channel can be opened and closed. First air guide channel keeps normally open state in the course of the work promptly, and second air guide channel can be opened and close as required, at the culinary art initial stage (the gas in the inner bag is less, humidity is lower), the inner bag is only slowly carminative through first air guide channel, along with the going on of culinary art, the internal pressure of inner bag risees (humidity risees promptly), the inside gas accumulation of inner bag, at this moment, open second air guide channel, the inner bag is carminative simultaneously through first air guide channel and second air guide channel, thereby accelerate carminative speed, when the gas volume in the inner bag drops to a definite value, second air guide channel can be closed once more, at this moment, the inner bag slowly exhausts through first air guide channel once more.
Further, the air outlet is formed in the top wall of the inner container, an upper mounting plate is horizontally arranged above the inner container, a gap is formed between the top surface of the inner container and the lower surface of the upper mounting plate, an air deflector is arranged on the upper surface of the upper mounting plate in a covering mode, the air exhaust channel is formed between the air deflector and the upper surface of the upper mounting plate in a surrounding mode, the air inlet is formed in the upper mounting plate and is vertically opposite to the air outlet, the first air guide channel and the second air guide channel are vertically arranged in the gap between the inner container and the upper mounting plate, and the first air guide channel and the second air guide channel are arranged in an embedded mode. The first air guide channel and the second air guide channel are arranged in an inner-outer nested mode, so that the internal structure of the exhaust structure is simple, multiple openings are not needed in the liner wall of the inner liner, the tightness of the inner liner in the cooking process is guaranteed, multiple air inlets can be avoided being arranged in the exhaust channel, and mixed flow is formed among air flows entering the air guide channels to influence the overall air inlet speed of the exhaust channel.
The exhaust pipe comprises an outer pipe and an inner pipe embedded in the outer pipe, the exhaust port of the inner pipe comprises an inner exhaust hole and an outer exhaust hole surrounding the periphery of the inner exhaust hole, the air inlet of the exhaust channel comprises an inner air inlet hole and an outer air inlet hole surrounding the periphery of the inner air inlet hole, the inner pipe is communicated with the inner exhaust hole and the inner air inlet hole, the inner cavity of the inner pipe forms the second air guide channel, the outer pipe is communicated with the outer exhaust hole and the outer air inlet hole, and the first air guide channel is surrounded between the inner peripheral surface of the outer pipe and the outer peripheral surface of the inner pipe. Therefore, the specific implementation structures of the first air guide channel and the second air guide channel are simple, and meanwhile, the first air guide channel and the second air guide channel can be prevented from generating unnecessary mutual interference in the exhaust process, so that the exhaust speeds of the first air guide channel and the second air guide channel are respectively ensured.
Furthermore, the sum of the exhaust areas of the inner exhaust holes is larger than that of the exhaust areas of the outer exhaust holes, and the sum of the air inlet areas of the inner air inlet holes is larger than that of the air inlet areas of the outer air inlet holes. Therefore, the total suction force of the exhaust fan at the inner air inlet hole is larger than that of the outer air inlet hole, and the total exhaust area of the inner exhaust hole is larger than that of the outer exhaust hole, so that the exhaust speed of the second air guide channel is larger than that of the first air guide channel.
Furthermore, the side wall of the inner tube is provided with an air guide opening communicated with the first air guide channel and the second air guide channel, and the air guide opening and the inner air inlet can be synchronously opened and closed. When the inner air inlet is opened to open the second air guide channel, the air guide ports are simultaneously opened to ensure that the first air guide channel is communicated with the second air guide channel, and because the sum of the air inlet areas of the inner air inlet holes is larger than the sum of the air inlet areas of the outer air inlet holes, the suction force at the inner air inlet holes is larger than that of the outer air inlet holes, most of the air entering the first air guide channel from the outer air inlet holes enters the second air guide channel through the air guide ports to be quickly discharged.
Further, still including transversely separate the mounting disc of establishing in the inner tube and being used for placing the water absorbent, air inlet separation blade and linkage guide structure, above-mentioned mounting disc includes that the level sets up and lays the diapire of air vent and vertical first lateral wall of enclosing upward and establishing in this diapire periphery, and this first lateral wall can shield above-mentioned air guide port completely, above-mentioned air inlet separation blade sets up in the below of above-mentioned inner air inlet hole and this air inlet separation blade can shield this inner air inlet hole completely, and, when the mounting disc moves down and breaks away from above-mentioned air guide port, above-mentioned air inlet separation blade can move down in step under above-mentioned linkage guide structure's effect and break away from above-mentioned inner air inlet. At the initial stage of cooking, gas in the inner container enters the first gas guide channel and the second gas guide channel through the outer exhaust hole and the inner exhaust hole respectively, the gas entering the first gas guide channel enters the exhaust channel through the outer air inlet hole to be discharged outwards, and the water vapor in the gas entering the second gas guide channel is partially adsorbed by the water absorbent due to the closing of the inner air inlet hole; along with the continuous progress of culinary art, the absorbent adsorbed steam is more and more, and when reaching a definite value, the gravity drive mounting disc of absorbent moves down and drives the air inlet separation blade in step and move down to make the interior inlet port open, the gas in the second air guide passageway gets into the exhaust passage through interior inlet port and discharges outward. In addition, when the mounting disc and the water absorbent accommodated in the mounting disc are arranged to enable the inner air inlet to be opened, the negative pressure area at the inner air inlet is far away from the air outlet, so that the humidity and the temperature of the area below the air outlet cannot be changed violently, and the local area of food can be prevented from being burnt.
Further, the shape of the air inlet baffle is circular. The suction force of the exhaust fan at the inner air inlet is changed into circular suction (namely the gap between the mouth edge of the inner air inlet and the periphery of the air inlet baffle plate) relative to the direct suction in the prior art, so that the range of the suction port at the inner air inlet is enlarged, the air inlet speed at the inner air inlet is increased, the circular suction speed increasing of the second air guide channel is realized, and the exhaust speed of the inner container is greatly accelerated.
Furthermore, the radius of the air inlet baffle is larger than the aperture of the inner air inlet hole. Therefore, the range of the suction port at the inner air inlet hole can be further expanded, the suction force at the inner air inlet hole of the exhaust fan is further increased, and the air inlet speed of the inner air inlet hole is further increased.
Further, when the first sidewall of the mounting plate is completely separated from the air guide opening, the air inlet speed at the inner air inlet is maximum. When the air inlet blocking piece moves downwards to be separated from the inner air inlet hole, the inner air inlet hole is opened, air in the second air guide channel is discharged into the exhaust channel through the inner air inlet hole, the area of the annular suction port is gradually increased along with the continuous downward movement of the air inlet blocking piece, the air inlet speed at the inner air inlet hole is further increased, and when the air inlet blocking piece moves downwards to a certain position, the downward movement is continued, and the air inlet speed at the inner air inlet hole is kept unchanged. When the first side wall of the mounting disc is completely separated from the air guide opening, the suction force between the air inlet baffle sheet which synchronously moves downwards with the mounting disc and the inner air inlet hole reaches the maximum, and the suction force is not increased if the air inlet baffle sheet continuously moves downwards, so that the design can ensure that the exhaust speed of the inner container is higher when the inner air inlet hole is opened.
Further, the linkage guide structure comprises a connecting sleeve, a guide post and a reset spring, a guide center hole is formed in the center of the bottom wall of the mounting disc, the connecting sleeve extends vertically, the upper end of the connecting sleeve is fixed to the lower surface of the air inlet separation blade, the lower end of the connecting sleeve is fixed to the upper surface of the bottom wall of the mounting disc and surrounds the periphery of the guide center hole, the guide post is vertically fixed to the upper surface of the top wall of the liner, the guide post can move up and down relative to the mounting disc in the connecting sleeve along the hole edge of the guide center hole, the reset spring is sleeved on the guide post and limited between the upper surface of the top wall of the liner and the lower surface of the bottom wall of the mounting disc, and the mounting disc is enabled to. The setting of reset spring enables the interior inlet port closed condition under, the separation blade that admits air can firmly support and establish in the below of interior inlet port for the stable closed condition that keeps of interior inlet port also enables simultaneously that admit air separation blade and mounting disc can steady removal when overcoming reset spring's elastic force and move down. In an initial state, the gravity sum of the air inlet baffle, the mounting disc and the water absorbent is smaller than the elastic force of the reset spring, the air inlet baffle closes the inner air inlet, and the first side wall of the mounting disc closes the air guide opening; when the water absorbent absorbs enough water vapor, the gravity sum of the air inlet blocking piece, the mounting disc and the water absorbent is larger than the elastic force of the reset spring, the air inlet blocking piece and the mounting disc start to move downwards, the inner air inlet hole is opened, the air guide hole is gradually opened until the first side wall of the mounting disc is completely separated from the air guide hole, the air guide hole is completely opened, and the air inlet speed at the inner air inlet hole reaches the maximum; when the internal pressure in the inner container is reduced to a certain value (namely, when the humidity is reduced to a certain value), the water absorbing agent is dehydrated under the action of hot air, the weight of the water absorbing agent is reduced, the sum of the weights of the air inlet baffle plate, the water absorbing agent and the tray is smaller than the elastic force of the reset spring, the air inlet baffle plate and the tray start to move upwards until the air inlet baffle plate is tightly attached to the lower hole edge of the inner air inlet hole, and the second air guide channel is closed.
The technical scheme adopted for further solving the third technical problem is as follows: an oven with the exhaust structure is provided.
Compared with the prior art, the invention has the advantages that: according to the invention, the air outlet of the inner container is communicated with the air inlet of the air exhaust channel through the first air guide channel and the second air guide channel respectively, and at least one of the first air guide channel and the second air guide channel can be opened and closed, so that the air exhaust speed of the inner container can be controlled through opening and closing of the first air guide channel and/or the second air guide channel, and further the air exhaust speed of the inner container can be regulated and controlled according to the baking requirement, so that the humidity in the inner container is kept at a certain level, and the baking effect is further improved.
Drawings
FIG. 1 is a sectional view of an oven incorporating an embodiment of the present invention with the internal air intake holes closed;
FIG. 2 is an enlarged view of portion A of FIG. 1;
FIG. 3 is a schematic view of the structure of FIG. 1 in another direction;
FIG. 4 is an enlarged view of portion B of FIG. 3;
FIG. 5 is a sectional view of the toaster in a state in which the inner air inlet holes are opened according to the embodiment of the present invention;
FIG. 6 is an enlarged view of portion C of FIG. 5;
FIG. 7 is a schematic view of the structure of FIG. 5 in another direction;
FIG. 8 is an enlarged view of portion D of FIG. 7;
fig. 9 is a schematic structural view of an inner tube in an embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 to 9, an oven includes an exhaust structure, the exhaust structure includes a liner 1, an upper mounting plate 2 is horizontally disposed above the liner 1, a gap is left between the upper mounting plate 2 and the top surface of the liner 1, an air deflector 7 is covered on the upper surface of the upper mounting plate 2, an exhaust channel 70 is defined by the air deflector 7 and the upper surface of the upper mounting plate 2, and an exhaust fan 71 is mounted at an air inlet end of the exhaust channel 70. In this embodiment, the exhaust fan 71 is a centrifugal fan, and includes a volute housing 711 covering the upper surface of the upper mounting plate 2 and a centrifugal impeller 712 provided in the volute housing 711. In this embodiment, the volute housing 711 and the air guiding plate 7 are an integral component.
The inner container 1 is provided with an exhaust port 11, the exhaust passage 70 is provided with an air inlet 21, the air inlet 21 is respectively communicated with a first air guide passage 91 and a second air guide passage 92, and at least one of the first air guide passage 91 and the second air guide passage 92 can be opened and closed. Like this through the exhaust velocity that can control inner bag 1 of opening and close of first air guide channel 91 and/or second air guide channel 92, and then can regulate and control the exhaust velocity of inner bag 1 as required toasting for humidity in the inner bag 1 keeps at certain level, promotes the effect of toasting then.
Further, the exhaust port 11 is opened in the top wall of the liner 1 and the intake port 21 is opened in the upper mounting plate 2, and the exhaust port 11 and the intake port 21 are vertically opposed to each other. In this embodiment, the exhaust speed of the second air guide passage 92 is greater than that of the first air guide passage 91, and the second air guide passage 92 can be opened and closed. That is, the first air guide channel 91 is kept in a normally open state during the operation, and the second air guide channel 92 can be opened and closed as required, at the initial stage of cooking (the air in the inner container 1 is less, and the humidity is relatively low), the inner container 1 only exhausts slowly through the first air guide channel 91, along with the progress of cooking, the internal pressure of the inner container 1 is increased (the humidity becomes high), the air in the inner container 1 accumulates, at this moment, the second air guide channel 92 is opened, the inner container 1 exhausts simultaneously through the first air guide channel 91 and the second air guide channel 92, so as to accelerate the exhaust speed, when the amount of air in the inner container 1 is reduced to a certain value (namely, the humidity is reduced to a certain value), the second air guide channel 92 can be closed again, and at this moment, the inner container 1 exhausts slowly through the first air guide channel 91 again.
Still further, the first air guide channel 91 and the second air guide channel 92 are vertically arranged in a gap between the inner container 1 and the upper mounting plate 2, and the inner container and the upper mounting plate are nested inside and outside. The first air guide channel 91 and the second air guide channel 92 are arranged in an inner-outer nested manner, so that the internal structure of the exhaust structure is simple, multiple openings are not required on the liner wall of the liner 1, the sealing performance of the liner 1 in the cooking process is ensured, and in addition, multiple air inlets 21 are also avoided in the exhaust channel 70, so that mixed flow is formed among air inlet flows to influence the integral air inlet speed of the exhaust channel 70. Specifically, an exhaust pipe 3 is vertically disposed in a gap between the inner container 1 and the upper mounting plate 2, the exhaust pipe 3 includes an outer pipe 31 and an inner pipe 32 embedded in the outer pipe 31, the exhaust port 11 of the inner container 1 includes an inner exhaust hole 112 and an outer exhaust hole 111 surrounding the outer periphery of the inner exhaust hole 112, the air inlet 21 of the exhaust passage 70 includes an inner air inlet hole 212 and an outer air inlet hole 211 surrounding the outer periphery of the inner air inlet hole 212, the inner pipe 32 communicates the inner exhaust hole 112 and the inner air inlet hole 212 and an inner cavity thereof constitutes the second air guide passage 92, the outer pipe 31 communicates the outer exhaust hole 111 and the outer air inlet hole 211, and the first air guide passage 91 is surrounded between an inner circumferential surface of the outer pipe 31 and an outer circumferential surface of the inner pipe 32. Therefore, the specific implementation structures of the first air guide channel 91 and the second air guide channel 92 are simple, and meanwhile, the first air guide channel 91 and the second air guide channel 92 can be prevented from generating unnecessary mutual interference in the exhaust process, so that the exhaust speeds of the first air guide channel 91 and the second air guide channel 92 can be respectively ensured. Preferably, in this embodiment, the cross section of the outer tube 31 decreases from bottom to top, so that the gas entering the first gas guide channel 91 can be better guided to the outer gas inlet hole 211. In this embodiment, the inner air inlet holes 212 are circular, the outer air inlet holes 211 are circumferentially spaced around the inner air inlet holes 212, the top wall of the liner 1 is raised upward to form a circular exhaust table 12, the inner air outlet holes 112 are circumferentially spaced on the exhaust table 12, the inner tube 32 covers the exhaust table 12, and the outer air outlet holes 111 are circumferentially spaced around the exhaust table 12 and are located in the first air guide channel 91. The exhaust area of the inner exhaust holes 112 is larger than the exhaust area of the outer exhaust holes 111, and the intake area of the inner intake holes 212 is larger than the intake area of the outer intake holes 211. Thus, the total suction force of the exhaust fan 71 at the inner intake holes 212 is greater than that of the outer intake holes 211, and the exhaust area of the inner exhaust holes 112 is greater than that of the outer exhaust holes 111, so that the exhaust speed of the second air guide passage 92 is greater than that of the first air guide passage 91.
Further, an air guide opening 321 communicating the first air guide passage 91 and the second air guide passage 92 is formed in the side wall of the inner tube 32, and the air guide opening 321 and the inner air inlet 21 can be opened and closed synchronously. Thus, when the inner air inlet 21 is opened to open the second air guide channel 92, the air guide ports 321 are simultaneously opened to communicate the first air guide channel 91 with the second air guide channel 92, and since the air inlet area of the inner air inlet holes 212 is larger than the sum of the air inlet areas of the outer air inlet holes 211, the suction force at the inner air inlet holes 212 is larger than that of the outer air inlet holes 211, most of the air entering the first air guide channel 91 from the outer air outlet holes 111 enters the second air guide channel 92 through the air guide ports 321 to be rapidly discharged. In this embodiment, the plurality of air guide holes 321 are formed at intervals along the circumferential wall of the inner tube 32, so that when the air guide holes 321 are opened, the air in the first air guide passage 91 can uniformly flow into the second air guide passage 92 through the air guide holes 321.
In addition, the water absorbing device further comprises a mounting plate 4, an air inlet blocking piece 5 and a linkage guide structure 6 which are transversely arranged in the inner tube 32 in a spaced mode and used for placing the water absorbing agent 8, wherein the mounting plate 4 comprises a bottom wall which is horizontally arranged and provided with an air vent 41 and a first side wall 42 which vertically upwards surrounds the periphery of the bottom wall, the first side wall 42 can completely shield the air guide opening 321, the air inlet blocking piece 5 is arranged below the inner air inlet opening 212, the air inlet blocking piece 5 can completely shield the inner air inlet opening 212, and when the mounting plate 4 moves downwards to be separated from the air guide opening 321, the air inlet blocking piece 5 can synchronously move downwards to be separated from the inner air inlet opening 212 under the action of the linkage guide structure 6. In the initial cooking stage, the gas in the inner container 1 enters the first gas guide channel 91 and the second gas guide channel 92 through the outer exhaust holes 111 and the inner exhaust holes 112 respectively, the gas entering the first gas guide channel 91 enters the exhaust channel 70 through the outer air inlet holes 211, and the water vapor in the gas entering the second gas guide channel 92 is partially adsorbed by the water absorbent 8 due to the closing of the inner air inlet holes 212; as the cooking continues, more and more water vapor is adsorbed by the water absorbing agent 8, and when a certain value is reached, the water absorbing agent 8 drives the mounting disc 4 to move downwards to synchronously drive the air inlet blocking piece 5 to move downwards, so that the inner air inlet hole 212 is opened, and the air in the second air guide channel 92 enters the air exhaust channel 70 through the inner air inlet hole 212. In addition, when the mounting disc 4 and the water absorbing agent 8 accommodated in the mounting disc 4 are arranged to open the inner air inlet hole 212, the negative pressure area at the inner air inlet hole 212 is far away from the air outlet 11, so that the humidity and the temperature of the area below the air outlet 11 cannot be changed violently, and the local area of food can be prevented from being burnt. As water-absorbing agent 8 in the present invention, various commercially available food-grade water-absorbing agents can be used, for example: activated alumina, and the like.
In this embodiment, the air inlet baffle 5 has a circular shape. The suction force of the exhaust fan 71 at the inner air inlet hole 212 is changed into circular suction (namely, a gap between the opening edge of the inner air inlet hole and the periphery of the air inlet baffle plate) relative to the direct suction in the prior art, so that the suction opening range at the inner air inlet hole 212 is enlarged, the air inlet speed at the inner air inlet hole 212 is increased, the circular suction speed of the second air guide channel 92 is increased, and the exhaust speed of the liner 1 is greatly increased. Preferably, the radius of the air intake flap 5 is larger than the aperture of the inner air intake hole 212. This further expands the range of the suction port at the inner intake holes 212, thereby further increasing the suction force of the exhaust fan 71 at the inner intake holes 212, and further increasing the intake speed of the inner intake holes 212. When the air inlet blocking piece 5 moves downwards to be separated from the inner air inlet hole 212, the inner air inlet hole 212 is opened, the air in the second air guide channel 92 is discharged into the exhaust channel 70 through the inner air inlet hole 212, the area of the annular suction port is gradually increased along with the continuous downward movement of the air inlet blocking piece 5, the air inlet speed at the position of the inner air inlet hole 212 is further increased, and when the air inlet blocking piece 5 moves downwards to a certain position, the downward movement is continued, and the air inlet speed at the position of the inner air inlet hole 212 is not increased. In the present invention, when the first sidewall 42 of the mounting plate 4 is completely separated from the air guide opening 321, the suction force between the air inlet blocking piece 5 and the inner air inlet hole 212 moving downward synchronously with the mounting plate 4 reaches the maximum, and if the air inlet blocking piece 5 moves downward continuously, the suction force is not increased, so that the design can make the exhaust speed of the inner container 1 faster when the inner air inlet hole 212 is opened.
The linkage guide structure 6 may have a plurality of implementation manners, in this embodiment, the linkage guide structure 6 includes a connection sleeve 61, a guide post 62 and a return spring 63, the center of the bottom wall of the mounting plate 4 is provided with a guide center hole 40, the connection sleeve 61 extends vertically, the upper end of the connection sleeve is fixed to the lower surface of the air inlet baffle 5, the lower end of the connection sleeve is fixed to the upper surface of the bottom wall of the mounting plate 4 and surrounds the periphery of the guide center hole 40, the guide post 62 is vertically fixed to the upper surface of the top wall of the liner 1, the guide post 62 can move up and down in the connection sleeve 61 relative to the mounting plate 4 along the hole edge of the guide center hole 40, and the return spring 63 is sleeved on the guide post 62 and is limited between the upper surface of the top wall of the liner 1 and the lower surface of the bottom wall of the mounting plate 4, so that. The arrangement of the return spring 63 enables the air inlet hole 212 to be in a closed state, and the air inlet blocking piece 5 can be stably abutted to the lower portion of the air inlet hole 212, so that the air inlet hole 212 is stably kept in the closed state, and meanwhile, the air inlet blocking piece 5 and the mounting plate 4 can stably move when the elastic force of the return spring 63 is overcome. In the initial state, the gravity and the elastic force of the air inlet blocking piece 5, the mounting disc 4 and the water absorbing agent 8 are smaller than the elastic force of the return spring 63, the air inlet blocking piece 5 closes the inner air inlet hole 212, and the first side wall 42 of the mounting disc 4 closes the air guide hole 321; when the water absorbing agent 8 absorbs enough water vapor, the gravity and the elastic force of the air inlet blocking piece 5, the mounting disc 4 and the water absorbing agent 8 are greater than the elastic force of the return spring 63, the air inlet blocking piece 5 and the mounting disc 4 start to move downwards, the inner air inlet hole 212 is opened, the air guide hole 321 is gradually opened until the first side wall 42 of the mounting disc 4 is completely separated from the air guide hole 321, the air guide hole 321 is completely opened, and the air inlet speed at the position of the inner air inlet hole 212 reaches the maximum; when the internal pressure in the inner container 1 is reduced to a certain value (namely, when the humidity is reduced to a certain value), the water absorbing agent 8 is dehydrated under the action of hot air, the weight of the water absorbing agent 8 is reduced, the sum of the weights of the air inlet baffle 5, the water absorbing agent 8 and the tray is smaller than the elastic force of the return spring 63, the air inlet baffle 5 and the tray start to move upwards until the air inlet baffle 5 is tightly attached to the lower hole edge of the inner air inlet hole 212, and the second air guide channel 92 is closed.
The working process of the invention is as follows:
at the initial stage of food baking, the internal pressure of the liner 1 is low (i.e. the humidity is low), the gas (including hot air and water vapor) in the liner 1 is mainly slowly discharged through the first gas guide channel 91, meanwhile, part of the gas enters the inner tube 32 through the inner exhaust holes 112 (i.e. the second gas guide channel 92, at this time, the inner air inlet hole 212 is in a closed state), the gas entering the inner tube 32 continues to diffuse upwards through the vent hole 41 on the bottom wall of the mounting plate 4, the water vapor in the gas is absorbed by the water absorbent 8, at this time, because the water vapor absorbed by the water absorbent 8 is less, the sum of the weights of the air inlet blocking piece 5, the water absorbent 8 and the mounting plate 4 is smaller than the elastic force of the return spring 63, the air inlet blocking piece 5 continuously closes.
As the baking process continues, the internal pressure of the liner 1 rises (i.e. the humidity rises), at this time, the humidity of the gas entering the second gas guide channel 92 increases, the water absorption rate of the water absorbing agent 8 reaches a certain value, the sum of the weights of the air inlet blocking piece 5, the water absorbing agent 8 and the mounting plate 4 is greater than the elastic force of the return spring 63, the air inlet blocking piece 5 and the mounting plate 4 start to move downwards synchronously, the inner air inlet hole 212 is opened, the second gas guide channel 92 is communicated, a strong negative pressure zone is formed at the inner air inlet hole 212, when the mounting plate 4 moves downwards, each gas guide hole 321 is opened gradually, as the air inlet area of the inner air inlet hole 212 is greater than the air inlet area of each outer air inlet hole 211, that is, the suction force at the outer air inlet hole 211 is greater than the suction force at the inner air inlet hole 212, most of the gas in the first gas guide channel 91 enters the area above the mounting, then discharged to the outside of the whole machine, and the internal pressure of the inner container 1 is gradually reduced (i.e., the humidity is gradually reduced). When the internal pressure of the inner container 1 is reduced to a certain value, the water absorbing agent 8 is dehydrated under the action of hot air, the weight of the water absorbing agent is reduced, the sum of the weights of the air inlet baffle piece 5, the water absorbing agent 8 and the mounting disc 4 is smaller than the elastic force of the return spring 63, the air inlet baffle piece 5 and the mounting disc 4 start to move upwards until the air inlet baffle piece 5 is tightly attached to the lower surface of the upper mounting plate 2, the inner air inlet hole 212 is closed, the second air guide channel 92 is closed again, and the process is circulated until the baking.
Claims (12)
1. The utility model provides an exhaust structure for cooking device, includes inner bag (1) that has gas vent (11) and sets up above inner bag (1) and exhaust passageway (70) that has exhaust fan (71), has seted up gas vent (11) and exhaust passageway (70) are equipped with air inlet (21) on above-mentioned inner bag (1), characterized in that, gas vent (11) of inner bag (1) and air inlet (21) of exhaust passageway (70) are linked together through first air guide channel (91) and second air guide channel (92) respectively, and at least one in this first air guide channel (91) and second air guide channel (92) can open and close.
2. The exhaust structure according to claim 1, wherein the second air guide passage (92) is exhausted at a speed higher than that of the first air guide passage (91), and the second air guide passage (92) is opened and closed.
3. The exhaust structure according to claim 2, wherein the exhaust port (11) is formed in a top wall of the inner container (1), the upper mounting plate (2) is horizontally arranged above the inner container (1), a gap is formed between a top surface of the inner container (1) and a lower surface of the upper mounting plate (2), an air deflector (7) is covered on an upper surface of the upper mounting plate (2), the air deflector (7) and the upper surface of the upper mounting plate (2) enclose the exhaust channel (70), the air inlet (21) is formed in the upper mounting plate (2) and vertically opposite to the exhaust port (11), and the first air guide channel (91) and the second air guide channel (92) are vertically arranged in the gap between the inner container (1) and the upper mounting plate (2) and are arranged in an internally-externally-nested manner.
4. An exhaust structure according to claim 3, further comprising an exhaust pipe (3) vertically disposed in a gap between the inner bag (1) and the upper mounting plate (2), the exhaust pipe (3) comprising an outer pipe (31) and an inner pipe (32) embedded in the outer pipe (31), the exhaust port (11) of the inner bag (1) comprising an inner exhaust hole (112) and an outer exhaust hole (111) surrounding the outer periphery of the inner exhaust hole (112), and the air inlet (21) of the exhaust passage (70) comprising an inner air inlet hole (212) and an outer air inlet hole (211) surrounding the outer periphery of the inner air inlet hole (212), the inner pipe (32) communicating the upper inner exhaust hole (112) and the inner air inlet hole (212) and an inner cavity thereof constituting the second air guide passage (92), and the outer pipe (31) communicating the outer exhaust hole (111) and the outer air inlet hole (211) and an inner peripheral surface of the outer pipe (31) and an outer peripheral surface of the inner pipe (32) defining the first air guide passage therebetween 91).
5. The exhaust structure according to claim 4, wherein the sum of the exhaust areas of the inner exhaust holes (112) is greater than the sum of the exhaust areas of the outer exhaust holes (111), and the sum of the intake areas of the inner intake holes (212) is greater than the sum of the intake areas of the outer intake holes (211).
6. The exhaust structure according to claim 5, wherein the side wall of the inner pipe (32) is provided with an air guide opening (321) communicating the first air guide passage (91) and the second air guide passage (92), and the air guide opening (321) and the inner air inlet (21) can be opened and closed synchronously.
7. A venting structure as defined in claim 6, further comprising a mounting plate (4) laterally spaced within the inner tube (32) for placement of the water-absorbing agent (8), an air-intake flap (5), and a cooperating guide structure (6), the mounting plate (4) comprises a bottom wall which is horizontally arranged and is provided with vent holes (41) and a first side wall (42) which vertically upwards surrounds the periphery of the bottom wall, the first side wall (42) can completely shield the air guide opening (321), the air inlet blocking piece (5) is arranged below the inner air inlet hole (212) and the air inlet blocking piece (5) can completely shield the inner air inlet hole (212), when the mounting plate (4) moves downwards to be separated from the air guide opening (321), the air inlet blocking piece (5) can synchronously move downwards to be separated from the inner air inlet hole (212) under the action of the linkage guide structure (6).
8. An exhaust structure according to claim 7, characterized in that the shape of the inlet flap (5) is circular.
9. An exhaust structure according to claim 8, characterized in that the radius of the air inlet flap (5) is larger than the aperture of the internal air inlet hole (212).
10. The exhaust structure according to any one of claims 7 to 9, wherein the linkage guide structure (6) comprises a connecting sleeve (61), a guide post (62) and a return spring (63), a guide center hole (40) is formed in the center of the bottom wall of the mounting plate (4), the connecting sleeve (61) extends vertically, the upper end of the connecting sleeve is fixed to the lower surface of the air inlet baffle plate (5), the lower end of the connecting sleeve is fixed to the upper surface of the bottom wall of the mounting plate (4) and surrounds the periphery of the guide center hole (40), the guide post (62) is vertically fixed to the upper surface of the top wall of the inner container (1), the guide post (62) can move up and down in the connecting sleeve (61) along the hole edge of the guide center hole (40) relative to the mounting plate (4), the return spring (63) is sleeved on the guide post (62) and limited between the upper surface of the top wall of the inner container (1) and the lower surface of the bottom wall of the mounting plate (4), and the mounting plate (4) has a tendency to move upwards.
11. The exhaust structure according to any one of claims 1 to 9, wherein the exhaust fan (71) is provided at an air inlet end of the exhaust passage (70), the exhaust fan (71) includes a volute casing (711) covering an upper surface of the upper mounting plate (2) and a centrifugal impeller (712) installed in the volute casing (711), and a center of the air inlet (21) is located on a central axis of the centrifugal impeller (712).
12. An oven having an exhaust structure as claimed in any one of claims 1 to 11.
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| CN202010888481.XA CN112168003B (en) | 2020-08-28 | 2020-08-28 | Exhaust structure for cooking device and oven with same |
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| CN202010888481.XA CN112168003B (en) | 2020-08-28 | 2020-08-28 | Exhaust structure for cooking device and oven with same |
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| CN112168003B CN112168003B (en) | 2022-03-18 |
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| CN110693343A (en) * | 2019-10-30 | 2020-01-17 | 宁波方太厨具有限公司 | Oven with drying function |
| CN113876214A (en) * | 2021-10-22 | 2022-01-04 | 宁波方太厨具有限公司 | Inner container exhaust structure and cooking device |
| CN113892831A (en) * | 2021-10-22 | 2022-01-07 | 宁波方太厨具有限公司 | Inner container exhaust structure and cooking device |
| WO2022142129A1 (en) * | 2020-12-31 | 2022-07-07 | 广东美的厨房电器制造有限公司 | Cooking appliance, control method for cooking appliance, and readable storage medium |
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| CN112168003B (en) | 2022-03-18 |
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