CN110811349A

CN110811349A - Baking oven

Info

Publication number: CN110811349A
Application number: CN201810897648.1A
Authority: CN
Inventors: 王丹; 杨均; 曹骥
Original assignee: Ningbo Fotile Kitchen Ware Co Ltd
Current assignee: Ningbo Fotile Kitchen Ware Co Ltd
Priority date: 2018-08-08
Filing date: 2018-08-08
Publication date: 2020-02-21

Abstract

The invention relates to an oven which comprises an inner container, a first heating pipe, a hot air baffle and an air heater, wherein the inner container is provided with a cooking inner cavity, the first heating pipe is arranged at the top of the cooking inner cavity, the hot air baffle is arranged at the rear part of the cooking inner cavity and forms a flow guide channel with the rear wall of the inner container, the air heater is arranged at the rear side of the inner container, the upper part of the hot air baffle is provided with an air inlet, the lower part of the hot air baffle is provided with an air outlet, and the width of at least the lower part of. The air inlet is arranged corresponding to the area of hot air, so that hot air can be sucked into the flow guide channel quickly and conveyed to the bottom of the cooking cavity downwards through the air heater, the width of the lower part of the flow guide channel is gradually reduced in the conveying process, the hot air conveying speed is improved, the convection of upper air and lower air in the cooking cavity is enhanced, the temperature distribution in the oven is uniform, and the baking effect is improved; meanwhile, convenience is provided for multilayer baking, and the utilization rate of energy in the oven is effectively improved.

Description

Baking oven

Technical Field

The invention relates to an oven, in particular to an oven capable of uniformly distributing heat.

Background

In order to improve the temperature field of the oven and meet the requirement of the baked food on the air quantity, a centrifugal fan is generally arranged inside the oven. National standard T/ZRQJ-2015 requires that the domestic oven avoids the human body to directly touch the centrifugal fan in the use process, therefore, generally can install hot air baffle in the existing oven before the centrifugal fan, provides the effect of water conservancy diversion when protecting the user, plays the effect of centrifugal fan spiral case.

For example, the chinese patent application publication No. CN206612681U entitled "an all-in-one oven with microwave oven" (application No. CN201621424419.0) discloses a structure, which includes a cooking cavity, a grill generating device for delivering baking heat to the cavity of the cooking cavity, a microwave generating device for delivering microwave energy to the cavity of the cooking cavity, and a control device connected to the grill generating device and the microwave generating device for controlling the working states of the grill generating device and the microwave generating device, wherein the grill generating device at least includes a back heating device disposed at the back of the cooking cavity, which includes a back hot air chamber cover fixed on a hot air baffle of the cooking cavity, and a closed hot air chamber is formed between the back hot air baffle and the cooking cavity; a back heating element disposed within the hot air chamber; the fan blades of the hot air blower or the fan are arranged in the hot air chamber; an air inlet and an air outlet which are communicated with the hot air chamber are arranged on the hot air baffle of the cooking cavity.

Due to the rising of hot air, the problems that the temperature of the upper layer is too high and the temperature of the lower layer is lower commonly exist in the existing oven, so that the upper layer is burnt and the lower layer is not baked completely easily. In order to enhance the convection inside the oven, one or two centrifugal fans are generally added in the middle of the back of the oven in the prior art, and the centrifugal fans mainly adopt a scheme of central air inlet and peripheral air outlet. Such a configuration, while seemingly solving the oven internal convection problem, actually highlights the oven cold and hot air partitioning problem. That is, the hot air diffuses upward and the cold air diffuses downward, so that the upper and lower areas of the oven cannot perform rapid heat exchange, the heat in the high-temperature air cannot be effectively utilized, and the following problems are directly caused:

(1) the oven has low energy efficiency;

(2) the heat cannot be supplied to more than multiple layers of food simultaneously;

(3) the color of the upper surface of the food is darker than that of the lower surface.

Disclosure of Invention

The invention aims to solve the technical problem of the prior art and provides an oven which can improve the baking effect by enhancing the convection of the upper area and the lower area of the oven to ensure that the temperature distribution in the oven is uniform.

Another technical problem to be solved by the present invention is to provide an oven capable of effectively improving the utilization rate of energy and facilitating the simultaneous baking of multiple layers of food, aiming at the current state of the prior art.

The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides an oven, includes inner bag, first heating pipe, hot-blast baffle and air heater, the inner bag has the culinary art inner chamber, the top of culinary art inner chamber is located to first heating pipe, hot-blast baffle locate culinary art inner chamber rear portion and with the inner bag after the wall between be formed with the water conservancy diversion passageway, the air heater is located the inner bag rear side and is used for providing power for the air exchange between culinary art inner chamber and the water conservancy diversion passageway, its characterized in that: the upper part of the hot air baffle is provided with an air inlet, the lower part of the hot air baffle is provided with an air outlet, and the width of at least the lower part of the flow guide channel in the front-back direction is gradually reduced from top to bottom.

In the above scheme, a first semicircular area protruding outwards is formed at the upper part of the hot air baffle, correspondingly, a second semicircular area protruding backwards is formed at the upper part of the inner container rear wall, the second semicircular area and the first semicircular area enclose an air inlet area, and the air inlet is formed in the first semicircular area. The structure is beneficial to expanding the width of the air inlet area in the front-back direction, increasing the speed of hot air sucked into the air inlet area at the upper part of the oven and being beneficial to the subsequent convection exchange of cold and hot air flow.

Preferably, the air inlets are multiple and extend downwards from the first semicircular area to form a circular air inlet area together with the first semicircular area.

As an improvement, the hot air baffle is formed with first extension areas which respectively extend outwards from two sides of the first semicircular area in a forward protruding manner, correspondingly, the rear wall of the inner container is formed with second extension areas which respectively extend outwards from two sides of the second semicircular area in a backward protruding manner, and the second extension areas and the first extension areas jointly enclose a wind guide area. Preferably, the width of the first expansion region in the up-down direction gradually increases from top to bottom. This structure is favorable to carrying the hot-blast downward of air inlet district and further from the air outlet backward flow of below to culinary art inner chamber bottom, the convection action of gas about the increase.

The improved structure is characterized in that a first contraction region extending downwards from the first expansion region is arranged on the lower portion of the hot air baffle in a forward protruding mode, the width of the first contraction region in the front-back direction is gradually reduced from top to bottom, a second contraction region extending downwards from the second expansion region is arranged on the lower portion of the rear wall of the liner in a backward protruding mode, the width of the second contraction region in the front-back direction is gradually reduced from top to bottom, the first contraction region and the second contraction region jointly enclose an air outlet region, and the air outlet is formed in the air outlet region. This structure makes the runner width of water conservancy diversion passageway lower part reduce gradually, can be favorable to increasing the velocity of flow of air current, improves the output speed of air current, and after the air current after accelerating was inputed the culinary art inner chamber from the oven bottom, the rapid rise is favorable to improving the convection current of air about the culinary art inner chamber, improves the temperature homogeneity in the culinary art inner chamber.

Preferably, the air outlet includes an upper air outlet, a middle air outlet and a lower air outlet which extend transversely in the air outlet area and are arranged at an interval from top to bottom, and the air outlet areas of the upper air outlet, the middle air outlet and the lower air outlet are gradually increased. For the oven in the prior art, the temperature of the air in the inner container at the bottom of the oven is lower, and the structure is adopted, so that the air outlet area of the air outlet is sequentially increased from top to bottom, namely the air outlet volume of hot air is sequentially increased from top to bottom, the uniform temperature in the inner container of the oven at all heights is facilitated, and the cooking effect is improved.

Preferably, a smooth transition arc surface is arranged between the lower edge of the first contraction area and the lower edge of the hot air baffle, and the lower air outlet is formed in the arc surface. Adopt such structure, the air outlet is arranged to the diapire of oven inner bag to one side down, and the hot-air of air outlet output can be strikeed on the diapire of oven inner bag down, is favorable to thoroughly upwards driving the cold air of oven inner bag bottom on the one hand, and on the other hand provides ascending impact force for the steam of air outlet output down, can further improve the convection current effect.

In a further improvement, a second heating pipe is arranged at the upper part of the air outlet area. Preferably, the upper edge of the first constriction region is higher than the upper edge of the second constriction region, and the second heating pipe is disposed between the upper edge of the first constriction region and the upper edge of the second constriction region. The steam at oven top passes through the air inlet and gets into the air inlet district and further through the wind-guiding district in the downward transportation process, and steam can have partial calorific loss, carries out the acceleration to the velocity of flow of steam before, heats gas, and the heat of compensation loss is favorable to improving the inside gas temperature of oven inner bag fast, improves and cures the effect.

For convenience of installation, the second heating pipe is formed into a U shape, the bottom of the second heating pipe is limited on the rear wall of the inner container through a support, and two ends of the second heating pipe are respectively bent backwards and penetrate through the rear wall of the inner container to be arranged.

Preferably, the air heater has a centrifugal impeller disposed at an upper portion of the guide passage, and the centrifugal impeller is disposed in the air intake area and the air guide area.

Compared with the prior art, the invention has the advantages that: the first heating pipe is arranged at the top of the inner container of the oven liner, hot air rises, and cold air falls, so that the air temperature at the top of the inner container of the oven is higher; meanwhile, as the cooking cavity of the invention keeps an obvious hot air rising process, the invention provides convenience for multilayer baking and effectively improves the utilization rate of energy in the oven.

Drawings

FIG. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a schematic view of a portion of the structure of FIG. 1;

FIG. 3 is a schematic structural diagram of a hot air baffle according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of the rear wall of the inner container in the embodiment of the present invention;

fig. 5 is a schematic view of an assembly structure of the second heating pipe and the air heater on the rear wall of the inner container in the 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 5, the oven of the present embodiment includes an inner container 1, a first heating pipe 2, a hot air baffle 3 and an air heater 4, wherein the inner container 1 has a cooking cavity 10, the first heating pipe 2 is disposed on the top of the cooking cavity 10, the hot air baffle 3 is disposed on the rear portion of the cooking cavity 10 and forms a flow guiding channel 5 with the rear wall of the inner container 1, and the air heater 4 is disposed on the rear side of the inner container 1 and is used for providing power for air flow exchange between the cooking cavity 10 and the flow guiding channel 5.

In the embodiment, the upper part of the hot air baffle 3 is provided with an air inlet 31, the lower part of the hot air baffle 3 is provided with an air outlet 32, and the width of the lower part of the flow guide channel 5 in the front-back direction is gradually reduced from top to bottom. Specifically, a first semicircular area 33 protruding outward is formed at the upper part of the hot air baffle 3, correspondingly, a second semicircular area 11 protruding backward is formed at the upper part of the rear wall of the inner container 1, the second semicircular area 11 and the first semicircular area 33 enclose together to form an air inlet area 51, the air inlet 31 is opened on the first semicircular area 33, and the plurality of air inlets 32 extend downward from the first semicircular area 33 to form a circular air inlet area 30 together with the first semicircular area 33. The hot air baffle 3 is formed with a first extended area 34 respectively extending outwards from two sides of the first semicircular area 33 in a forward protruding manner, correspondingly, the rear wall of the liner 1 is formed with a second extended area 12 respectively extending outwards from two sides of the second semicircular area 11 in a backward protruding manner, and the second extended area 12 and the first extended area 34 together enclose a wind guiding area 52. The hot air blower 4 is provided with a centrifugal impeller 41 arranged at the upper part of the diversion channel 5, the centrifugal impeller 41 is positioned in the air inlet area 51 and the air guiding area 52, and the upper part of the centrifugal impeller 41 is matched with the semicircular structure of the air inlet area 51, so that the conveying effect of the air flow is enhanced. The width of the first expanded region 34 in the up-down direction gradually increases from top to bottom, and the width of the second expanded region 12 in the up-down direction is kept uniform from top to bottom. The lower part of the hot air baffle 3 is convexly provided with a first contraction area 35 extending downwards from the first expansion area 34, the width of the first contraction area 35 in the front-back direction is gradually reduced from top to bottom, namely, the part of the hot air baffle 3 corresponding to the first contraction area 35 is gradually inclined backwards from top to bottom. The lower part of the back wall of the inner container 1 is convexly provided with a second contraction area 13 extending downwards from the second expansion area 12, the width of the second contraction area 13 in the front and back direction is gradually reduced from top to bottom, namely, the back wall of the inner container 1 corresponding to the second contraction area 13 is gradually inclined forwards from top to bottom, and the inclination is larger than the inclination of the part of the hot air baffle 3 corresponding to the first contraction area 35. The first contraction area 35 and the second contraction area 13 jointly enclose an air outlet area 53, and the air outlet 32 is arranged on the air outlet area 53.

The air outlet 32 of the present embodiment includes an upper air outlet 321, a middle air outlet 322, and a lower air outlet 323 extending transversely in the air-out area 52 and arranged at an interval up and down, and the air-out areas of the upper air outlet 321, the middle air outlet 322, and the lower air outlet 323 gradually increase. For the oven in the prior art, the temperature of the air in the inner container 1 at the bottom of the oven is lower, and by adopting the structure, the air outlet area of the air outlet 32 is sequentially increased from top to bottom, namely the air outlet volume of the hot air is sequentially increased from top to bottom, so that the temperature in each height of the inner container of the oven is favorably equalized, and the cooking effect is improved. For smooth transition's cambered surface 36 between the lower limb of the first shrink zone 35 of this embodiment and the lower limb of hot-blast baffle 3, lower air outlet 323 is seted up on this cambered surface 36, lower air outlet 323 is arranged oven inner bag 1's diapire to one side promptly, the hot-air of output from lower air outlet 323 can be strikeed on oven inner bag 1's diapire, be favorable to thoroughly driving the cold air of oven inner bag 1 bottom upwards on the one hand, on the other hand, the steam of output for lower air outlet 323 provides ascending impact force, improve the convection effect.

In the present embodiment, the upper part of the air outlet area 53 is provided with the second heating pipe 6. In this embodiment, the upper edge of the first constricted region 35 is higher than the upper edge of the second constricted region 13, and the second heating pipe 6 is arranged between the upper edge of the first constricted region 35 and the upper edge of the second constricted region 13. The second heating pipe 6 of this embodiment is shaped like a U, the bottom of the second heating pipe 6 is limited on the rear wall of the inner container 1 through a bracket 61, and two ends of the second heating pipe 6 are respectively bent backwards and arranged to penetrate through the rear wall of the inner container 1.

When the oven of this embodiment is used, because the high-temperature air and the water vapor are gathered at the top of the oven, and the heating effect of the first heating pipe 2 is added, the heat of the air and the water vapor is higher and higher, at this time, the hot air blower 4 is operated, so that the high-temperature air gathered at the upper part of the inner container 1 enters the air guide channel 5 through the air inlet 31 at the upper part of the hot air baffle plate 3, the wide air inlet area 51 can accommodate the high-temperature air with a larger flow rate, the high-temperature air is accelerated by the centrifugal blade 41 and then enters the narrowing air outlet area 53 through the air guide area 52, when the air passes through the second heating pipe 6, the lost heat of the air is supplemented, the high heat of the air is maintained, then the air can enter the cooking cavity 10 through the upper air outlet 321, the middle air outlet 322 and the lower air outlet 323 respectively, the upper air outlet 321, the middle air outlet 322 and, be favorable to directly giving the food that is located two-layer gridiron down with the high heat through the air, and the air that corresponds 1 diapire of oven inner bag can be because the high heat characteristic of self, diffusion from bottom to top rapidly, give the food in whole culinary art inner chamber 10 with the heat, the effect power effect of air heater 4 in addition for 1 bottom air of inner bag can more return the oven upper strata fast, and then circulate once more, whole process is favorable to improving the convection current of air about the culinary art inner chamber, improve the temperature homogeneity in the culinary art inner chamber.

Claims

1. The utility model provides an oven, includes inner bag (1), first heating pipe (2), hot-blast baffle (3) and air heater (4), inner bag (1) has culinary art inner chamber (10), the top of culinary art inner chamber (10) is located in first heating pipe (2), hot-blast baffle (3) locate culinary art inner chamber (10) rear portion and with inner bag (1) after the wall between be formed with water conservancy diversion passageway (5), inner bag (1) rear side is located in air heater (4) and be used for providing power for the air exchange between culinary art inner chamber (10) and water conservancy diversion passageway (5), its characterized in that: an air inlet (31) is formed in the upper portion of the hot air baffle (3), an air outlet (32) is formed in the lower portion of the hot air baffle (3), and the width of at least the lower portion of the flow guide channel (5) in the front-back direction is gradually reduced from top to bottom.

2. The oven of claim 1, wherein: the upper portion of hot-blast baffle (3) is formed with the protruding first semicircle region (33) of establishing outward, and is corresponding, the upper portion of inner bag (1) back wall is formed with the protruding second semicircle region (11) of establishing backward, and this second semicircle region (11) with first semicircle region (33) enclose into air inlet district (51) jointly, air intake (31) are seted up on first semicircle region (33).

3. The oven of claim 2, wherein: the air inlets (31) are multiple and extend downwards from the first semicircular area (33) to form a circular air inlet area (30) together with the first semicircular area (33).

4. The oven of claim 2, wherein: the hot air baffle (3) is provided with a first expansion area (34) which extends outwards from two sides of the first semicircular area (33) in a forward protruding mode, correspondingly, the rear wall of the inner container (1) is provided with a second expansion area (12) which extends outwards from two sides of the second semicircular area (11) in a backward protruding mode, and the second expansion area (12) and the first expansion area (34) jointly enclose a wind guide area (52).

5. The oven of claim 4, wherein: the width of the first expansion area (34) in the up-down direction is gradually increased from top to bottom.

6. The oven of claim 4, wherein: the hot air baffle (3) lower part is protruding to be equipped with first shrink region (35) from first expansion region (34) downwardly extending forward, and this first shrink region (35) width in front and back direction top-down reduces gradually, the lower part of inner bag (1) back wall is protruding backward to be equipped with second shrink region (13) from second expansion region (12) downwardly extending, and this second shrink region (13) width in front and back direction top-down reduces gradually, synthetic air-out district (53) is enclosed jointly in first shrink region (35) and second shrink region (13), air outlet (32) open on this air-out district (53).

7. The oven of claim 6, wherein: the air outlet (32) comprises an upper air outlet (321), a middle air outlet (322) and a lower air outlet (323) which transversely extend in the air outlet area (53) and are arranged at intervals up and down, and the air outlet areas of the upper air outlet (321), the middle air outlet (322) and the lower air outlet (323) are gradually increased.

8. The oven of claim 7, wherein: an arc surface (36) in smooth transition is arranged between the lower edge of the first contraction area (35) and the lower edge of the hot air baffle (3), and the lower air outlet (323) is formed in the arc surface (36).

9. The oven of claim 6, wherein: and a second heating pipe (6) is arranged at the upper part of the air outlet area (53).

10. The oven of claim 9, wherein: the upper edge of the first constriction region (35) is higher than the upper edge of the second constriction region (13), and the second heating tube (6) is arranged between the upper edge of the first constriction region (35) and the upper edge of the second constriction region (13).

11. The oven of claim 9, wherein: the second heating pipe (6) is formed into a U shape, the bottom of the second heating pipe (6) is limited on the rear wall of the inner container (1) through a support (61), and two ends of the second heating pipe (6) are bent backwards respectively and penetrate through the rear wall of the inner container (1) to be arranged.

12. The oven of any one of claims 1 to 11, wherein: the air heater (4) is provided with a centrifugal impeller (41) arranged at the upper part of the flow guide channel (5).