Heating and cooling switching structure of oven

Abstract

The utility model discloses a heating and cooling switching structure of an oven, which comprises an oven main body, a baking cavity, a fan module, an air return pipeline and an air inlet pipeline, the top of the oven main body is provided with an exhaust port corresponding to an air outlet of the fan module, and the top of the oven main body is provided with an air inlet corresponding to the air inlet pipeline. A circulating air door is arranged between the air outlet of the fan module and the air inlet pipeline, and the circulating air door is movably blocked between the air outlet of the fan module and the air inlet pipeline. According to the utility model, the on-off states of the air outlet of the fan module and the air inlet pipeline are switched through the circulating air door, so that the air path requirements of two working procedures of heating baking and cooling are met, the work of two states of hot air internal circulation and cooling external circulation is realized through one group of fan module, the cost of the whole equipment is effectively saved, and the working efficiency is improved. And the installation and maintenance difficulty is reduced, and the product drying requirement is met.

Description

Technical Field

[0001] This utility model relates to the field of automated production and processing technology, and in particular to a heating and cooling switching structure for an oven. Background Technology

[0002] In the production and processing of many products, baking in an oven is generally required to remove residual moisture adhering to the product after washing and other processes. In a conventional oven, the product is first transported to the heating section, where air is heated to dry it. After drying, the product is then transported to the cooling section to cool down, and finally, the product is sent out after cooling to room temperature, completing the drying process. However, this method requires multiple fans to circulate hot air in the heating section and blow cold air in the cooling section, which increases the cost of equipment installation and maintenance, and makes the overall structure more complex.

[0003] Therefore, existing technologies have shortcomings and need to be improved. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of the prior art and provide a heating and cooling switching structure for an oven.

[0005] The technical solution of this utility model is as follows: A heating and cooling switching structure for an oven is provided, comprising: an oven body, a baking cavity disposed inside the oven body, a fan module disposed on the top of the oven body, a return air pipe connecting the air inlet of the fan module and the baking cavity, and an air inlet connecting the air outlet of the fan module and the baking cavity. An exhaust port is provided on the top of the oven body corresponding to the air outlet of the fan module, and an air inlet is provided on the top of the oven body corresponding to the air inlet pipe. A circulating damper is provided between the air outlet of the fan module and the air inlet pipe, and the circulating damper is movable to block the air outlet of the fan module and the air inlet pipe.

[0006] Furthermore, the circulating damper includes: a damper drive module disposed on the oven body, and a baffle plate connected to the output end of the damper drive module. The damper drive module drives the baffle plate to move up and down reciprocally to connect or disconnect the air outlet and air inlet of the fan module.

[0007] Furthermore, valves are provided for the exhaust port and the air inlet respectively.

[0008] Furthermore, the fan module includes: a drive motor disposed on the top of the oven body, and a centrifugal fan connected to the output end of the drive motor. The air inlet of the centrifugal fan is connected to the return air pipeline, and the air outlet of the centrifugal fan is connected to the air inlet pipeline and the air outlet.

[0009] Furthermore, it also includes a heating component, which is disposed within the return gas pipeline.

[0010] By adopting the above solution, this utility model switches the on / off state of the air outlet and air inlet of the fan module through the circulating damper, thereby meeting the air path requirements of both heating and baking and cooling processes. In this way, a single fan module can achieve both hot air internal circulation and cooling external circulation, effectively saving the overall equipment cost and reducing the difficulty of installation and maintenance, while meeting the product drying requirements. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the structure of this utility model.

[0012] Figure 2 This is a top view of the present invention.

[0013] Figure 3 for Figure 2 Cross-sectional view of AA.

[0014] Figure 4 for Figure 2 Cross-sectional view of BB in the middle. Detailed Implementation

[0015] The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0016] Please see Figures 1 to 4 This utility model provides a heating and cooling switching structure for an oven, comprising: an oven body 1, a baking cavity 11 disposed inside the oven body 1, a fan module 2 disposed on the top of the oven body 1, a return air pipe 12 connecting the air inlet of the fan module 2 and the baking cavity 11, and an air inlet pipe 13 connecting the air outlet of the fan module 2 and the baking cavity 11. An exhaust port 42 is provided on the top of the oven body 1 corresponding to the air outlet of the fan module 2, and an air inlet 41 is provided on the top of the oven body 1 corresponding to the air inlet pipe 13. A circulating damper 3 is provided between the air outlet of the fan module 2 and the air inlet pipe 13, and the circulating damper 3 is movable and obstructs the air outlet of the fan module 2 and the air inlet pipe 13.

[0017] During the heating and drying stage, the circulating damper 3 is open. At this time, the air outlet of the fan module 2 is connected to the air inlet pipe 13, forming a circulating air path through the fan module 2, air inlet pipe 13, baking cavity 11, and return air pipe 12. When the fan module 2 is started, hot air is blown through the circulating air path, thereby heating and baking the product in the baking cavity 11 to dry the product.

[0018] During the cooling phase, the circulating damper 3 is closed. At this time, the air outlet of the fan module 2 is disconnected from the air inlet pipe 13, and the air outlet is connected to the exhaust port 42. Simultaneously, the air inlet pipe 13 is connected to the air inlet 41. When the fan module 2 starts, the negative pressure generated at the air inlet of the fan module 2 draws gas out of the return air pipe 12 and discharges it through the exhaust port 42. Due to the negative pressure suction of the fan module 2, the high-temperature gas in the baking cavity 11 is drawn into the return air pipe 12 for discharge. Simultaneously, due to the reduced air pressure inside the baking cavity 11, external cold air is drawn in through the air inlet 41 along the air inlet pipe 13, thus delivering cold air into the baking cavity 11. With the continuous discharge of high-temperature air and the continuous delivery of external cold air, the product inside the baking cavity 11 is rapidly cooled.

[0019] This invention switches the on / off state of the air outlet and air inlet pipe 13 of the fan module 2 through the circulating damper 3, thereby meeting the air path requirements of both heating and baking and cooling processes. In this way, a single fan module 2 can achieve both hot air internal circulation and cooling external circulation, effectively saving the overall equipment cost and reducing the difficulty of installation and maintenance, while meeting the product drying requirements.

[0020] In some embodiments, the circulating damper 3 includes: a damper drive module disposed on the oven body 1, and a baffle plate connected to the output end of the damper drive module. The damper drive module drives the baffle plate to move up and down reciprocally to connect or disconnect the air outlet of the fan module 2 from the air inlet pipe 13. In some optional embodiments, the damper drive module uses a cylinder or an electric push rod, which connects to the baffle plate through the output end of the damper drive module and drives the baffle plate to move up and down, thereby realizing the connection and disconnection between the air outlet of the fan module 2 and the air inlet pipe 13. In a specific embodiment, a cylinder is used as the damper drive module. The cylinder is disposed at the top of the oven body 1, and the piston rod of the cylinder is connected to the baffle plate. During the heating and drying stage, the piston rod of the cylinder pushes the baffle plate out, causing the baffle plate to move down, connecting the air outlet of the fan module 2 with the air inlet pipe 13, so that the fan module 2 can circulate hot air in the baking cavity 11. During the cooling and temperature reduction stage, the piston rod of the cylinder pulls the baffle plate back, causing the baffle plate to move upward and cut off the air outlet of the fan module 2 from the air inlet pipe 13, so that the fan module 2 can discharge the high-temperature gas in the baking cavity 11 from the exhaust port 42.

[0021] In some embodiments, the exhaust port 42 and the air inlet 41 are each equipped with a valve 43. During the heating and drying stage, the valves 43 at both the exhaust port 42 and the air inlet 41 are closed to prevent hot air from being discharged from the exhaust port 42 and cold air from being drawn in from the air inlet 41, thus ensuring the drying effect on the products in the baking cavity 11. During the cooling stage, the valves 43 at both the exhaust port 42 and the air inlet 41 are open, allowing the fan module 2 to discharge the high-temperature gas in the baking cavity 11 to the outside through the exhaust port 42 and to draw in cold air from the outside through the air inlet 41, thereby rapidly cooling the products in the baking cavity 11.

[0022] In some optional embodiments, the valve 43 is a butterfly valve. Since the overall structure of the butterfly valve is small, it avoids occupying too much space and can effectively cut off and close the air path, meeting the needs of air path control under different working conditions.

[0023] In some embodiments, the fan module 2 includes: a drive motor 21 disposed on the top of the oven body 1, and a centrifugal fan 22 connected to the output end of the drive motor 21. The air inlet of the centrifugal fan 22 is connected to the return air pipe 12, and the air outlet of the centrifugal fan 22 is connected to the air inlet pipe 13 and the air outlet. During operation, the drive motor 21 drives the turbine inside the centrifugal fan 22 to rotate, thereby generating negative pressure at the air inlet and blowing air towards the air outlet, satisfying the requirement of circulating airflow.

[0024] In some embodiments, the present invention further includes a heating component 5, which is disposed within the return air pipe 12. During the heating and drying stage, the heating component 5 is activated to heat the air drawn in at the air inlet of the fan module 2. The heated air is then blown into the baking cavity 11 through the air inlet pipe 13 by the fan module 2, forming a circulating flow of hot air. During cooling, since the heating component 5 is disposed at the air inlet of the fan module 2, the heat generated at the uncooled heating component 5 during the exhaust stage will not heat the air inside the baking cavity 11, effectively improving the cooling efficiency.

[0025] In summary, this utility model switches the on / off state of the air outlet and air inlet of the fan module by means of a circulating damper, thereby meeting the air path requirements of both heating and baking and cooling processes. In this way, a single fan module can achieve both hot air internal circulation and cooling external circulation, effectively saving the overall equipment cost and reducing the difficulty of installation and maintenance, while meeting the product drying requirements.

[0026] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A heating and cooling switching structure for an oven, characterized in that, include: The oven body comprises a baking cavity inside the oven body, a fan module on the top of the oven body, a return air pipe connecting the air inlet of the fan module and the baking cavity, and an air outlet connecting the air outlet of the fan module and the air inlet of the baking cavity. The top of the oven body has an exhaust port corresponding to the air outlet of the fan module, and the top of the oven body has an air inlet corresponding to the air inlet of the air inlet. A circulating damper is provided between the air outlet of the fan module and the air inlet, and the circulating damper is movable to block the air outlet of the fan module and the air inlet.

2. The heating and cooling switching structure of the oven according to claim 1, characterized in that, The circulating damper includes: a damper drive module disposed on the oven body, and a baffle plate connected to the output end of the damper drive module. The damper drive module drives the baffle plate to move up and down reciprocally to connect or cut off the air outlet and air inlet of the fan module.

3. The heating and cooling switching structure of the oven according to claim 1, characterized in that, The exhaust port and the air inlet are each equipped with a valve.

4. The heating and cooling switching structure of the oven according to claim 1, characterized in that, The fan module includes: a drive motor disposed on the top of the oven body, and a centrifugal fan connected to the output end of the drive motor. The air inlet of the centrifugal fan is connected to the return air pipeline, and the air outlet of the centrifugal fan is connected to the air inlet pipeline and the air outlet.

5. The heating and cooling switching structure of the oven according to claim 1, characterized in that, It also includes a heating component, which is disposed within the return gas pipeline.

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