Oven capable of improving heat circulation effect

Abstract

The oven capable of improving the heat circulation effect comprises an oven body, a door body, a heating mechanism and an air circulation mechanism, and the oven body is provided with a heating cavity with an opening in the front side; the door body covers the opening in the front side of the box body; the heating mechanism is arranged in the box body and is used for generating heat to the heating cavity; the air circulation mechanism is arranged on the rear side of the heating cavity and comprises a centrifugal fan structure, and when the centrifugal fan structure works, negative pressure is generated in the middle of the centrifugal fan structure to suck airflow in the middle area of the heating cavity and output airflow to the upper area of the heating cavity. Airflow conveyed to the upper portion of the heating cavity by the centrifugal fan structure sinks to the lower portion of the heating cavity along the door body and then enters the air circulation mechanism. According to the oven disclosed by the utility model, a stable air circulation mechanism is formed in the heating cavity, so that the heat distribution of all areas in the heating cavity tends to be uniform.

Description

Technical Field

[0001] The utility model relates to the field of ovens, in particular to an oven capable of improving heat circulation effect. Background Art

[0002] An oven is a common household food cooking device. Existing ovens are equipped with heating elements in the upper and lower parts of the heating chamber, and the upper and lower heating elements are used to heat the upper and lower parts of the food. When this type of oven is working, the heat distribution inside the heating chamber is uneven, resulting in different degrees of heating of the food at different positions. In order to solve the above technical problems, ovens with fan mechanisms have appeared on the market (such as Chinese patent No. CN202122981747.8). Fans are arranged on the left and right sides of the heating chamber, and the fans on both sides are used to blow air to the middle of the heating chamber to accelerate the airflow in the heating chamber, thereby improving the heat distribution in the heating chamber. However, since this type of oven does not form an effective heat circulation inside the heating chamber, the heat distribution in different areas of the heating chamber is still uneven. For this reason, the applicant has developed an oven with a higher heat circulation effect. Utility Model Content

[0003] The utility model aims to overcome the shortcomings of the prior art and provide an oven with improved heat circulation effect, forming a stable air circulation mechanism in the heating cavity so that the heat distribution in all areas of the heating cavity tends to be uniform.

[0004] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0005] An oven with improved heat circulation effect comprises a box body, a door body, a heating mechanism and an air circulation mechanism, wherein the box body is provided with a heating chamber with a front opening; the door body cover is arranged on the front opening of the box body; the heating mechanism is arranged in the box body for generating heat for the heating chamber; the air circulation mechanism is arranged at the rear side of the heating chamber, and comprises a centrifugal fan structure, wherein when the centrifugal fan structure is in operation, negative pressure is generated in the middle thereof to inhale airflow in the middle area of ​​the heating chamber, and airflow is output to the upper area of ​​the heating chamber, and the airflow transported to the upper part of the heating chamber by the centrifugal fan structure sinks along the door body to the lower part of the heating chamber and then enters the air circulation mechanism.

[0006] Compared with the prior art, the utility model is an oven with improved heat circulation effect, in which an air circulation mechanism is arranged on the rear side of the heating chamber. The air circulation mechanism can suck in hot air from the middle and lower areas of the heating chamber, and at the same time transport hot air to the upper area of ​​the heating chamber, thereby forming a stable air circulation mechanism in the heating chamber, so that the heat generated by the heating mechanism can be quickly diffused in the upper, middle and lower areas of the heating chamber, so that the heat distribution in all areas of the heating chamber tends to be uniform.

[0007] Furthermore, a mounting plate and an air guide plate are provided on the rear side of the heating chamber, wherein the air guide plate is located on the side of the mounting plate facing the heating chamber, and a distance is left between the mounting plate and the air guide plate; the centrifugal fan structure includes a motor, fan blades and a guide member, the motor is arranged on the side of the mounting plate away from the heating chamber, the fan blades are located on the side of the mounting plate facing the heating chamber, the output shaft of the motor passes through the mounting plate and is connected to the fan blades, the air guide plate is provided with a plurality of first air inlet holes corresponding to the middle of the fan blades, a plurality of air outlet holes are provided on the upper part of the air guide plate, and a plurality of second air inlet holes are provided on the lower part of the air guide plate; the guide member is provided on the guide member and is located on the outside of the fan blade, and is used to guide the airflow driven by the fan blade to the air outlet holes.

[0008] The air circulation mechanism adopts the above-mentioned setting method, so that the hot air enters the centrifugal fan structure through the first air inlet hole and the second air inlet hole, and the centrifugal fan structure then outputs the hot air to the heating chamber through the air outlet hole; in addition, since the fan blades drive the airflow to diffuse in a projectile manner around, a guide piece is set to form a barrier on the outside of the fan blade, so that the airflow driven by the fan blades is directed to the air outlet hole, thereby effectively improving the air circulation efficiency.

[0009] Furthermore, the rear end surface of the air guide member is located behind the front end surface of the fan blade, and the length of the air guide member in the horizontal direction is not greater than the distance between the air guide plate and the mounting plate.

[0010] The above-mentioned setting method can ensure that the guide member can guide the airflow driven by the fan blade to the air outlet in a directional manner, and at the same time ensure that the airflow flowing into the area between the mounting plate and the air guide plate through the second air inlet can flow upward from the rear end surface of the guide member to the surrounding side of the fan blade and be driven by the fan blade to flow.

[0011] Furthermore, the guide member is provided with an arc portion and a guide portion, the arc portion is located outside the fan blade, the bottom of the arc portion is located above the second air inlet, the notch of the arc portion faces upward, and the guide portion is located on the notch of the arc portion and extends to the air outlet.

[0012] The fan blade drives the airflow to diffuse in all directions in a projectile manner. The arc portion enables the airflow driven by the fan blade to flow in a circular area, thereby forming a vortex-shaped airflow. The guide portion can guide the vortex-shaped airflow to the air outlet.

[0013] Furthermore, the lowest point of the first air inlet is located above the lower end surface of the fan blade.

[0014] The above arrangement can avoid the backflow of the airflow flowing in from the first air inlet hole, thereby ensuring the directional flow of the airflow in the middle area of ​​the heating chamber.

[0015] Furthermore, the air guide plate is located on the outer periphery of the first air inlet and is provided with a circle of guide grooves recessed into the heating chamber, and the guide member is located on the outer periphery of the guide grooves; the fan blades drive the airflow to flow in a projectile shape toward its surrounding side and enter the guide grooves, and the airflow entering the guide grooves is guided to the air outlet by the guide member.

[0016] The setting of the guide groove can gather the airflow driven by the fan blades, limit the airflow from flowing around and causing airflow turbulence, and make the airflow driven by the fan blades form a vortex airflow in the guide groove, thereby reducing the loss of air volume.

[0017] Furthermore, the ring width of the guide groove is not less than the length of the blade of the fan blade.

[0018] Since the direction of the airflow in front of the fan blade when the fan blade rotates is "inflow into the middle of the fan blade - outflow from the outside of the fan blade - the airflow turns and flows back to the middle of the fan blade", by designing the ring width of the guide groove to be no less than the length of the fan blade, a barrier is formed on the front side of the fan blade, so that the airflow driven by the fan blade can only enter the guide groove and flow around the guide groove, thereby avoiding a reduction in air volume; if the ring width of the guide groove is too narrow, the front side blocking effect on the airflow driven by the fan blade is reduced, and part of the airflow in the middle of the air guide plate flows back to the middle of the heating chamber.

[0019] Furthermore, two groups of centrifugal fan structures are arranged horizontally at intervals.

[0020] The above arrangement enables centrifugal fan structures to be provided on both sides of the heating chamber to promote the flow of hot air.

[0021] Further, the heating mechanism includes a heating element arranged in the heating chamber; or, the heating mechanism includes a heating element arranged outside the centrifugal fan structure; or, the heating mechanism includes a heating element arranged in the heating chamber and a heating element arranged outside the centrifugal fan structure.

[0022] Furthermore, the heating element is arranged corresponding to the air outlet and the second air inlet.

[0023] The above arrangement can increase the contact time between the heating element and the airflow, thereby increasing the heat of the airflow flowing into the heating chamber. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a vertical cross-sectional view of the utility model;

[0025] Figure 2 It is a horizontal cross-sectional view of the utility model;

[0026] Figure 3 is a first angle schematic diagram of the air circulation mechanism;

[0027] Figure 4 is a second angle schematic diagram of the air circulation mechanism;

[0028] Figure 5 It is an exploded view of the air circulation mechanism;

[0029] Figure 6 is a cross-sectional view of the air circulation mechanism;

[0030] Figure 7 It is a schematic diagram of the wind deflector and the fan blades;

[0031] Figure 8 is a schematic diagram of an air deflector.

[0032] Description of labels:

[0033] Box body 1, heating chamber 2, door body 3, heating element 4, mounting plate 5, air guide plate 6, first air inlet 7, air outlet 8, second air inlet 9, centrifugal fan structure 10, motor 11, fan blade 12, flow guide 13, arc portion 14, guide portion 15, guide groove 16. DETAILED DESCRIPTION

[0034] The following describes the implementation of the utility model in conjunction with the accompanying drawings:

[0035] See also Figures 1 to 8 An oven for improving heat circulation effect of the present embodiment includes a box body 1, a door body 3, a heating mechanism and an air circulation mechanism. The box body 1 is provided with a heating chamber 2 with a front opening; the door body 3 is covered on the front opening of the box body 1; the heating mechanism is arranged in the box body 1, and is used to produce heat to the heating chamber 2; the air circulation mechanism is arranged at the rear side of the heating chamber 2, and includes a centrifugal fan structure 10. When the centrifugal fan structure 10 is working, a negative pressure is generated in the middle part to inhale the airflow in the middle area of ​​the heating chamber 2, and output the airflow to the upper area of ​​the heating chamber 2. The airflow transported by the centrifugal fan structure 10 to the upper part of the heating chamber 2 sinks along the door body 3 to the lower part of the heating chamber 2 and then enters the air circulation mechanism.

[0036] The box body 1 is located at the rear side of the heating chamber 2 and is provided with a mounting plate 5 and an air guide plate 6, the air guide plate 6 is located on the side of the mounting plate 5 facing the heating chamber 2, and a distance is left between the mounting plate 5 and the air guide plate 6; the centrifugal fan structure 10 includes a motor 11, a fan blade 12 and a guide member 13, the motor 11 is arranged on the side of the mounting plate 5 away from the heating chamber 2, the fan blade 12 is located on the side of the mounting plate 5 facing the heating chamber 2, the output shaft of the motor 11 passes through the mounting plate 5 and is connected to the fan blade 12, the air guide plate 6 is provided with a plurality of first air inlet holes 7 corresponding to the middle of the fan blade 12, the upper part of the air guide plate 6 is provided with a plurality of second air inlet holes 9, and the guide member 13 is arranged on the guide member 13 and is located on the outside of the fan blade 12, and is used to guide the airflow driven by the fan blade 12 to the air outlet hole 8.

[0037] The air circulation mechanism adopts the above-mentioned setting method, so that the hot air enters the centrifugal fan structure 10 through the first air inlet hole 7 and the second air inlet hole 9, and the centrifugal fan structure 10 then outputs the hot air to the heating chamber 2 through the air outlet hole 8; in addition, since the fan blades 12 drive the air flow to diffuse in the surroundings in a projectile manner, a guide member 13 is provided to form a barrier on the outside of the fan blades 12, so that the air flow driven by the fan blades 12 is directed to the air outlet hole 8, thereby effectively improving the air circulation efficiency.

[0038] The rear end surface of the air guide member 13 is located behind the front end surface of the fan blade 12 , and the length of the air guide member 13 in the horizontal direction is not greater than the distance between the air guide plate 6 and the mounting plate 5 .

[0039] The above-mentioned arrangement can ensure that the guide member 13 can guide the airflow driven by the fan blade 12 to the air outlet 8 in a direction, and at the same time ensure that the airflow flowing into the area between the mounting plate 5 and the air guide plate 6 through the second air inlet 9 can flow upward from the rear end surface of the guide member 13 to the side around the fan blade 12, and be driven by the fan blade 12 to flow.

[0040] The deflector 13 is provided with an arc portion 14 and a guide portion 15, the arc portion 14 is located outside the fan blade 12, the bottom of the arc portion 14 is located above the second air inlet 9, the notch of the arc portion 14 faces upward, and the guide portion 15 is located on the notch of the arc portion 14 and extends to the air outlet 8. The guide portion 15 extends upward in a straight line.

[0041] The fan blades 12 drive the airflow to diffuse in all directions in a projectile manner. The arc portion 14 enables the airflow driven by the fan blades 12 to flow in a circular area, thereby forming a vortex-like airflow. The guide portion 15 can guide the vortex-like airflow to the air outlet 8.

[0042] The lowest point of the first air inlet 7 is located above the lower end surface of the fan blade 12 .

[0043] The above arrangement can prevent the airflow flowing in from the first air inlet hole 7 from flowing back, thereby ensuring that the airflow in the middle area of ​​the heating chamber 2 flows in a directional manner.

[0044] The air guide plate 6 is located at the outer periphery of the first air inlet hole 7 and is provided with a circle of guide grooves 16 recessed into the heating chamber 2, and the guide member 13 is located at the outer periphery of the guide grooves 16; the fan blades 12 drive the airflow to flow in a projectile shape toward its peripheral side and enter the guide grooves 16, and the airflow entering the guide grooves 16 is guided by the guide member 13 to the air outlet hole 8.

[0045] The guide groove 16 can gather the airflow driven by the fan blades 12, restrict the airflow from flowing around and causing airflow turbulence, so that the airflow driven by the fan blades 12 forms a vortex airflow in the guide groove 16, thereby reducing the loss of air volume.

[0046] The ring width of the guide groove 16 is not less than the length of the blade of the fan blade 12 .

[0047] Since the airflow direction at the front of the fan blade 12 when the fan blade 12 rotates is "inflow into the middle of the fan blade 12 - outflow from the outside of the fan blade 12 - the airflow turns and returns to the middle of the fan blade 12", by designing the ring width of the guide groove 16 to be no less than the length of the blade of the fan blade 12, a barrier is formed on the front side of the blade of the fan blade 12, so that the airflow driven by the fan blade 12 can only enter the guide groove 16 and flow around the guide groove 16, thereby avoiding a reduction in air volume; if the ring width of the guide groove 16 is too narrow, the front side blocking effect on the airflow driven by the fan blade 12 is reduced, and part of the airflow in the middle of the air guide plate 6 flows back to the middle of the heating chamber 2.

[0048] Two groups of centrifugal fan structures 10 are arranged horizontally at intervals.

[0049] The above arrangement enables the centrifugal fan structures 10 to be provided on both the left and right sides of the heating chamber 2 to promote the flow of hot air.

[0050] The heating mechanism includes a heating element arranged in the heating chamber 2 and a heating element arranged outside the centrifugal fan structure 10 .

[0051] Specifically, the heating element disposed on the outside of the centrifugal fan structure 10 is disposed around the outside of the fan blade 12 , and the heating element is disposed corresponding to the air outlet 8 and the second air inlet 9 .

[0052] The above arrangement can increase the contact time between the heating element and the airflow, thereby increasing the heat of the airflow flowing into the heating chamber 2.

[0053] In other embodiments, the heating mechanism includes a heating element disposed in the heating chamber 2 .

[0054] In other embodiments, the heating mechanism includes a heating element disposed outside the centrifugal fan structure 10 .

[0055] Compared with the prior art, the utility model is an oven with improved heat circulation effect, in which an air circulation mechanism is arranged on the rear side of the heating chamber 2, and the air circulation mechanism can suck hot air from the middle and lower areas of the heating chamber 2, and at the same time transport hot air to the upper area of ​​the heating chamber 2, so as to form a stable air circulation mechanism in the heating chamber 2, so that the heat generated by the heating mechanism can be quickly diffused in the upper, middle and lower areas of the heating chamber 2, so that the heat distribution in all areas of the heating chamber 2 tends to be uniform.

[0056] According to the disclosure and teaching of the above description, the technical personnel in the field to which the utility model belongs can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. An oven for improving heat circulation effect, characterized in that: include: The box body is provided with a heating chamber with a front opening; A door body, which is covered on the front opening of the box body; A heating mechanism is arranged in the box body and is used to generate heat for the heating cavity; The air circulation mechanism is arranged at the rear side of the heating chamber, and includes a centrifugal fan structure. When the centrifugal fan structure is in operation, a negative pressure is generated in the middle of the centrifugal fan structure to suck in the airflow in the middle area of ​​the heating chamber, and output the airflow to the upper area of ​​the heating chamber; The airflow delivered by the centrifugal fan structure to the upper part of the heating chamber sinks along the door body to the lower part of the heating chamber and then enters the air circulation mechanism.

2. The oven for improving heat circulation effect according to claim 1, characterized in that: The box body is provided with a mounting plate and an air guide plate at the rear side of the heating chamber, wherein the air guide plate is located on the side of the mounting plate facing the heating chamber, and a distance is left between the mounting plate and the air guide plate; The centrifugal fan structure includes a motor, a fan blade and a guide member. The motor is arranged on the side of the mounting plate away from the heating chamber, the fan blade is arranged on the side of the mounting plate facing the heating chamber, the output shaft of the motor passes through the mounting plate and is connected to the fan blade, the guide plate is provided with a plurality of first air inlet holes corresponding to the middle of the fan blade, the upper part of the guide plate is provided with a plurality of air outlet holes, and the lower part of the guide plate is provided with a plurality of second air inlet holes; The guide member is arranged on the guide member and is located outside the fan blade, and is used for guiding the airflow driven by the fan blade to the air outlet.

3. The oven for improving heat circulation effect according to claim 2, characterized in that: The rear end surface of the air guide member is located behind the front end surface of the fan blade, and the length of the air guide member in the horizontal direction is not greater than the distance between the air guide plate and the mounting plate.

4. The oven for improving heat circulation effect according to claim 2, characterized in that: The guide member is provided with an arc portion and a guide portion, the arc portion is located outside the fan blade, the bottom of the arc portion is located above the second air inlet, the notch of the arc portion faces upward, and the guide portion is located on the notch of the arc portion and extends to the air outlet.

5. The oven for improving heat circulation effect according to claim 2, characterized in that: The lowest point of the first air inlet is located above the lower end surface of the fan blade.

6. The oven for improving heat circulation effect according to claim 2, characterized in that: The air guide plate is located at the outer periphery of the first air inlet hole and is provided with a circle of guide grooves sunken into the heating cavity, and the air guide member is located at the outer periphery of the guide groove; The fan blade drives the airflow to flow toward the peripheral side thereof in a projectile shape and enter the guide groove. The airflow entering the guide groove is guided to the air outlet by the guide member.

7. The oven for improving heat circulation effect according to claim 6, characterized in that: The ring width of the guide groove is not less than the length of the blade of the fan blade.

8. The oven for improving heat circulation effect according to claim 1, characterized in that: The centrifugal fan structure is provided with two groups at intervals horizontally.

9. The oven for improving heat circulation effect according to claim 1, characterized in that: The heating mechanism comprises a heating element arranged in the heating chamber; Alternatively, the heating mechanism comprises a heating element arranged outside the centrifugal fan structure; Alternatively, the heating mechanism includes a heating element arranged in the heating chamber, and a heating element arranged outside the centrifugal fan structure.

10. The oven for improving heat circulation effect according to claim 9, characterized in that: The heating element is arranged corresponding to the air outlet and the second air inlet.

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