CN112535417A

CN112535417A - Heated air circulation structure and oven

Info

Publication number: CN112535417A
Application number: CN202011240462.2A
Authority: CN
Inventors: 李海平; 王京华; 郑健; 申灵敏
Original assignee: Haier Smart Home Co Ltd; Qingdao Haier Wisdom Kitchen Appliance Co Ltd
Current assignee: Haier Smart Home Co Ltd; Qingdao Haier Wisdom Kitchen Appliance Co Ltd
Priority date: 2020-11-09
Filing date: 2020-11-09
Publication date: 2021-03-23

Abstract

The invention discloses a hot air circulation structure and an oven, belonging to the field of baking equipment, wherein an upper heating pipe and a lower heating pipe of the hot air circulation structure are respectively arranged at the top and the bottom of an inner container, a cover plate is covered at the back of the inner container, an air duct is formed between the cover plate and the back of the inner container, an upper air inlet and a lower air inlet are respectively arranged on the cover plate corresponding to the upper heating pipe and the lower heating pipe, a plurality of strip-shaped air outlets are distributed between the upper air inlet and the lower air inlet in parallel along the vertical direction, an upper hot air blower and a lower hot air blower are respectively arranged at the upper part and the lower part of the air duct corresponding to the upper air inlet and the lower air inlet so as to respectively pump the hot air at the upper part and the lower part of the inner container into the air duct for hot air circulation, the strip-shaped air outlets, the uniformity of air-out is improved, the uniformity of the temperature field in the inner container is improved, the baking efficiency is improved, and the coloring uniformity of baked food is improved.

Description

Heated air circulation structure and oven

Technical Field

The invention relates to the technical field of baking equipment, in particular to a hot air circulation structure and an oven.

Background

When a household oven is used, the key factor influencing the food baking effect is the uniformity of the temperature inside the oven, and particularly when a multi-layer baking tray is used, if the temperature distribution inside the oven is not uniform, the baked food is not uniformly colored and even is uncooked and cooked. The oven of taking hot-blast function of some not lacked in the existing market, it adopts hot-blast fan cooperation hot air baffle to carry out heated air circulation to culinary art cavity, improves the homogeneity of the inside temperature of oven for culinary art food is more even.

However, the uniformity of the temperature inside the oven depends on the guiding of the hot air baffle plate to the flow direction of the hot air, and because the fan is generally positioned at the center of the inner container of the oven, the air outlet is also a circular hollow air outlet, and the air volume on one side of the fan is larger than the air volume on the other side after the fan rotates, the hot air flow is uneven, and the problem of uneven coloring exists during the cooking of food.

Therefore, it is desirable to provide a hot air circulation structure and an oven to solve the above technical problems in the prior art.

Disclosure of Invention

The invention aims to provide a hot air circulation structure and an oven, which improve the uniformity of hot air flow and further improve the uniformity of a temperature field.

In order to achieve the purpose, the technical scheme adopted by the invention is as follows:

a heated air circulation structure comprising:

an inner container;

the upper heating pipe and the lower heating pipe are respectively arranged at the top and the bottom of the inner container;

the cover plate is covered on the back of the inner container, an air channel is formed between the cover plate and the back of the inner container, an upper air inlet and a lower air inlet are respectively formed in the positions, corresponding to the upper heating pipe and the lower heating pipe, on the cover plate, and a plurality of strip-shaped air outlets are distributed in parallel at intervals in the vertical direction between the upper air inlet and the lower air inlet;

and the upper air heater and the lower air heater are respectively arranged at the upper part and the lower part of the air duct corresponding to the upper air inlet and the lower air inlet.

As the preferable technical scheme of the hot air circulation structure, the side section of the cover plate is wavy, and the positions of the upper air inlet, the lower air inlet and the air outlet are all protruded towards one side of the inner cavity of the inner container.

As a preferable technical solution of the above hot air circulation structure, one side of the cover plate facing the upper hot air blower and one side of the cover plate facing the lower hot air blower are both in a horn-shaped opening.

As a preferable technical solution of the above hot air circulation structure, the air outlet areas of the plurality of air outlets are gradually reduced from the middle to both sides.

As a preferable technical solution of the above hot air circulation structure, the cross section of the air outlet is a flat rectangle.

As a preferred technical scheme of the above hot air circulation structure, the upper air inlet and the lower air inlet both include a plurality of strip-shaped slits which are distributed in parallel at intervals in the vertical direction, and the strip-shaped slits extend in the horizontal direction.

As a preferable technical scheme of the above hot air circulation structure, the upper air heater and the lower air heater are cross flow fans.

As a preferable embodiment of the above hot air circulation structure, the hot air circulation structure further includes:

and the switch sheet is rotatably arranged at the air outlet and used for opening or closing the air outlet.

An oven comprises the hot air circulation structure according to any one of the above technical schemes, the oven is provided with n layers of baking trays, the number of the air outlets is n-1, the air outlets are correspondingly positioned above the baking trays except for the uppermost layer, and the upper heating pipes are arranged above the baking trays on the uppermost layer.

As a preferred technical solution of the above oven, a distance between the air outlet and the upper layer of the baking tray is smaller than a distance between the air outlet and the lower layer of the baking tray.

The invention has the beneficial effects that:

the invention provides a hot air circulation structure and an oven, wherein an upper heating pipe and a lower heating pipe of the hot air circulation structure are respectively arranged at the top and the bottom of an inner container and used for heating air in the inner container, a cover plate is covered at the back of the inner container, an air duct is formed between the cover plate and the back of the inner container, an upper air inlet and a lower air inlet are respectively arranged on the cover plate corresponding to the upper heating pipe and the lower heating pipe, a plurality of strip-shaped air outlets are distributed in parallel along the vertical direction between the upper air inlet and the lower air inlet, an upper hot air blower and a lower hot air blower are respectively arranged at the upper part and the lower part of the air duct corresponding to the upper air inlet and the lower air inlet so as to respectively pump hot air at the upper part and the lower part of the inner container into the air duct for hot air circulation, compared with the prior art that the hot air blower is arranged, a plurality of air outlets are distributed on the cover plate along the vertical direction in parallel, and the uniformity of air outlet is effectively improved, so that the uniformity of a temperature field in the inner container is improved, the baking efficiency of the oven and the coloring uniformity of baked food are improved, and the baking effect is guaranteed.

Drawings

FIG. 1 is a schematic view of an oven according to an embodiment of the present invention;

FIG. 2 is a schematic view of an oven according to an embodiment of the present invention from another perspective;

FIG. 3 is a schematic structural diagram of a portion of an oven according to an embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a portion of an oven provided in accordance with an embodiment of the present invention from another perspective;

FIG. 5 is a schematic structural diagram of an oven according to a second embodiment of the present invention;

fig. 6 is a schematic structural diagram of a switch sheet according to a second embodiment of the present invention;

fig. 7 is a schematic structural diagram of a cover plate and a switch plate of an oven according to a second embodiment of the present invention.

In the figure:

1. an inner container; 2. an upper heating pipe; 3. a cover plate; 4. an upper inlet; 5. a lower air inlet; 6. an air outlet; 7. installing a hot air blower; 8. a lower air heater; 9. a switch sheet; 91. a body; 92. a toggle part; 93. a rotating shaft; 10. a grill.

Detailed Description

In order to make the technical problems solved, the technical solutions adopted and the technical effects achieved by the present invention clearer, the technical solutions of the present invention are further described below by way of specific embodiments with reference to the accompanying drawings. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not limiting of the invention. It should be further noted that, for the convenience of description, only some but not all of the elements associated with the present invention are shown in the drawings.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, removably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are used based on the orientations and positional relationships shown in the drawings only for convenience of description and simplification of operation, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used only for descriptive purposes and are not intended to have a special meaning.

Example one

The embodiment provides a heated air circulation structure, can be used to in toasting equipment such as oven, and this heated air circulation structure can effectively improve hot air flow's homogeneity to effectively improve the inside temperature field homogeneity of oven, shorten the toast time, improve heat utilization rate, improve the homogeneity of coloring and the efficiency of toasting food.

As shown in fig. 1 to 4, the hot air circulation structure mainly includes an inner container 1, a cover plate 3, a heating pipe and an air heater, wherein the heating pipe includes an upper heating pipe 2 and a lower heating pipe (not shown), and the air heater includes an upper air heater 7 and a lower air heater 8. The upper heating pipe 2 and the lower heating pipe are respectively arranged at the top and the bottom of the inner container 1 and used for heating the air in the inner container 1. The apron 3 covers the back of locating inner bag 1, form the wind channel between the back of apron 3 and inner bag 1, be provided with air intake and air outlet 6 on the apron 3, the air intake includes last air inlet 4 and lower air intake 5, specifically, last heating pipe 2 and the position of lower heating pipe have been seted up respectively to the apron 3, it has the air outlet 6 of a plurality of bars to follow vertical direction parallel interval distribution between last air inlet 4 and the lower air intake 5, air outlet 6 extends along the horizontal direction, go up air heater 7 and lower air heater 8 and correspond last air inlet 4 respectively and lower air inlet 5 sets up in the upper portion and the lower part in wind channel, the air inlet that the air heater accessible corresponds takes out the heat of heating pipe to the wind channel at the back of inner bag 1 in, blow to each layer through air outlet 6 again, realize heated air circulation.

Compared with the prior art in which the hot air blower is arranged in the middle and the air outlet 6 is in a circular structure, in the embodiment, the upper hot air blower 7 and the lower hot air blower 8 are respectively arranged at the upper part and the lower part of the air duct corresponding to the upper heating pipe 2 and the lower heating pipe, so that the hot air at the upper part and the lower part of the liner 1 can be respectively pumped into the air duct for hot air circulation, and the flowing circulation of the hot air is facilitated; the air outlet 6 of bar has good guide effect to hot-blast, improves apron 3 to the guidance quality of hot-blast flow direction, and a plurality of air outlets 6 have effectively improved the homogeneity of air-out along vertical direction parallel distribution on apron 3 to improve the temperature field homogeneity in inner bag 1, and then improve the toast efficiency of oven and toast the homogeneity of coloring of food, guarantee to toast the effect. Optionally, both the upper heating tube 2 and the lower heating tube are arranged side by side to ensure the heating effect, preferably at equal intervals.

Preferably, the air outlets 6 are distributed on the cover plate 3 at equal intervals, so that the uniformity of air outlet and the uniformity of the temperature field of the liner 1 are further improved.

Optionally, as shown in fig. 3 and 4, a side cross section of the cover plate 3 is wavy, that is, a plurality of protruding structures are formed on the cover plate 3 at intervals when viewed from the side, specifically, positions where the air outlet 6 and the air inlet are both arranged protrude toward one side of the inner cavity of the inner container 1. The part with the air outlet 6 is arranged to be a convex structure so as to be convenient for arranging the air outlet 6, and the part with the air inlet is arranged to be a convex structure so as to be convenient for installing the air heater

Furthermore, one side of the cover plate 3 facing the air heater is in a horn opening shape, which is beneficial to leading hot air pumped from the air inlet duct by the air heater into the air outlet 6 quickly, and realizing hot air circulation.

Furthermore, the air outlet area of the air outlets 6 is gradually reduced from the middle to the two sides. The position far away from the heating pipe is correspondingly less in heat radiation of the heating pipe, the temperature at the position is lower, the structural design can increase the heat flowing to the position, and the improvement of the uniformity of a temperature field in the whole space of the inner container 1 is facilitated.

In this embodiment, the upper air heater 7 and the lower air heater 8 are cross-flow fans, which have low noise and long air supply distance, and are beneficial to supplying heat from the upper and lower parts to the middle layers. Preferably, the cross section of the air outlet 6 is flat and rectangular, and air outlet is more concentrated and uniform under the matching of the cross flow fan.

The upper air inlet 4 and the lower air inlet 5 both comprise a plurality of strip-shaped gaps which are arranged in parallel along the vertical direction at intervals, the strip-shaped gaps extend along the horizontal direction, and preferably the strip-shaped gaps are distributed at equal intervals to improve the uniformity of air inlet.

The embodiment also provides an oven, which comprises the hot air circulation structure, wherein the oven is provided with n layers of baking trays, the number of the air outlets 6 is n-1, the n-1 air outlets 6 are correspondingly positioned above the n-1 layers of baking trays except the uppermost layer one by one, and the upper heating pipes 2 are arranged above the baking tray on the uppermost layer. The air outlet 6 is positioned above the corresponding baking tray, so that hot air is blown through each layer, a heat circulation channel is added, and the uniformity of a temperature field and the food coloring uniformity are improved. Fig. 1 shows a five-layer oven as an example, and four air outlets 6 are provided.

Preferably, the distance between the air outlet 6 and the upper layer baking tray is smaller than that between the air outlet 6 and the lower layer baking tray, that is, the air outlet 6 between the upper layer baking tray and the lower layer baking tray is closer to the bottom of the upper layer baking tray. Referring to fig. 1, fig. 1 shows a grill 10 located at a third level from top to bottom, the top of a baking tray (not shown in the figure) is provided with a ledge for being placed on the grill 10, the baking tray has a certain depth, the bottom of the baking tray is close to the lower air outlet 6, and preferably can abut on a corresponding protruding structure of the lower air outlet 6, and the top of the baking tray is located below the upper air outlet 6. Under this structure, the hot-air that blows out from the wind channel blows to the place obstacle that passes through of inner bag 1 less through air outlet 6, can not blockked by overware gridiron 10 and food, can more effective "stir" the heat flow in the inner bag 1 space for the temperature field distributes more evenly, further improves the temperature field homogeneity and toasts the homogeneity of coloring of food.

Optionally, a heating pipe can be added in an air duct formed by the cover plate 3 and the inner container 1, so that the uniformity of the temperature field in the inner container 1 can be improved more quickly, and the baking time can be shortened. Preferably, a plurality of heating pipes are arranged between the upper and

lower heat blowers

7 and 8 in a vertical direction.

Example two

This embodiment provides a heated air circulation structure, and compared with the heated air circulation structure in the first embodiment, the heated air circulation structure is different in that:

as shown in fig. 5 to 7, the hot air circulation structure further includes a switch sheet 9, the switch sheet 9 is rotatably disposed at the air outlet 6, and the switch sheet 9 is used for opening or closing the air outlet 6.

The switch piece 9 comprises a body 91 and a toggle part 92 connected below the body 91, wherein the length of the body 91 is not less than that of the air outlet 6, the width (along the vertical direction) of the body 91 is slightly less than that of the air outlet 6, rotating shafts 93 are arranged on two sides of the toggle part 92, the switch piece 9 is rotatably connected with the lower part of the air outlet 6 through the rotating shafts 93, and torsion springs (not shown in the figure) are arranged on the rotating shafts 93. The torsion spring makes the air outlet 6 be covered by the switch sheet 9 when the baking tray is not put in. In this state, the lower part of the outlet 6 still has a small strip-shaped gap for ventilation, as shown in fig. 5 and 7, only one layer of the switch sheet 9 is shown. When the baking tray is put in, along with the pushing-in of the baking tray, the edge of one side of the baking tray close to the cover plate 3 pushes the toggle part 92 of the switch sheet 9, the switch sheet 9 is driven to rotate towards one side of the inner cavity of the inner container 1, and the air outlet 6 is in a completely opened state. Optionally, the width of the body 91 of the switch sheet 9 is smaller than the width of the grill pan edge, so as to avoid the switch sheet 9 pressing the food on the grill pan when opening.

Through increasing a mobilizable switch piece 9 in every air outlet 6 departments for the air-out area that the air outlet 6 that the layer that does not place the overware corresponds is little, and the air-out area that the layer that placed the overware corresponds is big, has effectively improved the utilization ratio of heat energy, guarantees that the heat circulates in the top of overware, effectively sends into the heat of great proportion into the upper space of putting into that layer of overware, is favorable to food to color.

The foregoing embodiments are merely illustrative of the principles and features of this invention, which is not limited to the above-described embodiments, but rather is susceptible to various changes and modifications without departing from the spirit and scope of the invention, which changes and modifications are within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A heated air circulation structure, comprising:

an inner container (1);

the upper heating pipe (2) and the lower heating pipe are respectively arranged at the top and the bottom of the inner container (1);

the cover plate (3) is covered on the back of the inner container (1), an air channel is formed between the cover plate (3) and the back of the inner container (1), an upper air inlet (4) and a lower air inlet (5) are respectively formed in the positions, corresponding to the upper heating pipe (2) and the lower heating pipe, of the cover plate (3), and a plurality of strip-shaped air outlets (6) are distributed in parallel at intervals along the vertical direction between the upper air inlet (4) and the lower air inlet (5);

and the upper air heater (7) and the lower air heater (8) are respectively arranged at the upper part and the lower part of the air duct corresponding to the upper air inlet (4) and the lower air inlet (5).

2. The hot air circulating structure according to claim 1,

the side section of the cover plate (3) is wavy, and the positions of the upper air inlet (4), the lower air inlet (5) and the air outlet (6) are all protruded towards one side of the inner cavity of the inner container (1).

3. The heated air circulation structure according to claim 2, wherein the side of the cover plate (3) facing the upper and lower heat blowers (7, 8) is flared.

4. The hot air circulation structure according to claim 1, wherein the air outlet areas of the plurality of air outlets (6) are gradually reduced from the middle to both sides.

5. The heated air circulation structure according to claim 1, wherein the cross-section of the outlet port (6) is a flat rectangle.

6. The heated air circulation structure according to claim 1, wherein the upper inlet (4) and the lower inlet (5) each comprise a plurality of strip-shaped slits spaced apart in parallel in a vertical direction, the strip-shaped slits extending in a horizontal direction.

7. The heated air circulation structure according to claim 1, wherein the upper heat blower (7) and the lower heat blower (8) are cross flow fans.

8. The hot air circulation structure according to any one of claims 1 to 7, further comprising:

the switch piece (9) is rotatably arranged at the air outlet (6), and the switch piece (9) is used for opening or closing the air outlet (6).

9. An oven, characterized in that, includes the hot air circulation structure according to any one of claims 1 to 8, the oven has n layers of baking trays, the number of the air outlets (6) is n-1, the air outlets (6) are located above the baking trays except the uppermost layer in a one-to-one correspondence, and the upper heating pipes (2) are located above the baking trays on the uppermost layer.

10. The oven according to claim 9, characterized in that the distance between the air outlet (6) and the baking tray on the upper layer is smaller than the distance between the air outlet (6) and the baking tray on the lower layer.