CN202304273U - Hot air circulation oven - Google Patents

Abstract

The utility model discloses a hot air circulation oven which comprises a heating device and an oven, wherein the heating device comprises a shell, an air inlet is arranged on the outer wall of the shell, an electric heater is installed in the shell, and the upper end of the electric heater directly contacts and is connected with an opened oil tank; and the lower end of the side wall of the shell is connected with an air suction pipeline through a fan, the fan is communicated with an inner cavity of the shell, the tail end of the air suction pipeline is connected to the oven, the oven is connected to the upper end of the side wall of the shell through an air-out pipeline, and a bracket is arranged on the inner wall of the oven for placing a baking plate. The hot air circulation oven can heat the air by heating heat transfer oil, so that the air in the oven can be rapidly heated to hot air, thus accelerating the drying speed of the product. In addition, the hot air in the oven can be guided back to a heating box through the air-out pipeline, therefore, the heat loss is reduced, the energy utilization is improved, and meanwhile, the reduction of the sucked cold air out of the system is beneficial to stabilizing the hot air temperature in the oven. According to the hot air circulation oven, the structure is reasonable and simple, the heat utilization is high and the temperature of the hot air in the oven is stable.

Description

A hot air circulation oven

technical field

The utility model relates to an oven device, in particular to a hot air circulation oven used for heating and dehumidifying raw materials and products of pharmacy, food, light industry, chemical industry and heavy industry.

Background technique

With the continuous development of pharmaceutical, food and chemical industries, the application of hot air circulation ovens is increasing, and the requirements for hot air circulation ovens are also getting higher and higher. At present, the hot air in hot air circulation is generally directly heated by heaters. Air, and then pass the hot air into the oven through the fan to heat and dry the raw materials and products such as pharmaceuticals and food, but the heat generated by this method is slow, and the temperature rise of the air is slow, so it cannot be realized quickly. The heating of raw materials and products affects the efficiency of industrial production. In addition, because the general hot air circulation oven uses hot and cold air circulation, that is, the cold air outside the hot air circulation oven system is continuously sucked in and delivered to the oven after heating. Oven, which greatly reduces the utilization rate of heat, and it is not easy to make the temperature in the oven tend to be constant.

Contents of the invention

In order to overcome the deficiencies of the prior art, the utility model provides a heat transfer oil rapidly heated by a heater, and then the heat transfer oil rapidly heats the surrounding air, and the hot air in the oven system can be recycled, with high heat utilization rate, Constant temperature hot air circulation oven.

The technical scheme that the utility model solves its technical problem adopts is:

A hot air circulation oven, which includes a heating device and an oven, the heating device includes a casing, the outer wall of the casing is provided with an air inlet, and an electric heater is installed inside the casing. There is an air channel, the upper end of the electric heater is connected to an open oil tank, and the electric heater is in direct contact with the oil tank; the lower end of the side wall of the housing is provided with an air intake pipe, which is connected to the housing through a fan , the fan communicates with the inner cavity of the casing, the end of the air inlet pipe is connected to the oven, and the oven is connected to the upper end of the side wall of the casing through the air outlet pipe.

Preferably, the shell includes an inner layer and an outer layer, and a thermal insulation material is filled between the inner layer and the outer layer.

Further, the oven includes an inner layer of the oven and an outer layer of the oven, and a thermal insulation material is filled between the inner layer of the oven and the outer layer of the oven.

Further, the oven is provided with an air distribution plate at the air intake duct.

Preferably, the inner wall of the oven is provided with a bracket for placing a baking plate.

The beneficial effects of the utility model are: the product indirectly heats the air in the oven by heating the heat transfer oil, so that the air in the oven can be quickly heated into hot air, and the drying speed of raw materials and products such as food and chemical industry is accelerated. , The hot air in the oven is guided back to the heating box through the outlet pipe, which reduces the loss of heat and improves the utilization rate of heat. At the same time, because the intake of cold air outside the system is reduced, it is beneficial to ensure the stability of the temperature of the hot air in the oven. The structure of this product is reasonable and simple, the heat utilization rate is high, and the temperature of the hot air in the oven is stable.

Description of drawings

Below in conjunction with accompanying drawing and embodiment the utility model is further described.

Fig. 1 is a schematic diagram of the installation structure of the utility model.

Detailed ways

With reference to Fig. 1, a kind of hot air circulating oven of the present utility model, it comprises heating device 1 and oven 2, and described heating device 1 comprises housing 11, and the outer wall of described housing 11 is provided with air inlet 111, and air inlet 111 Located at the upper end of the side of the casing 11, an electric heater 12 is installed inside the casing 11, an air passage is left between the electric heater 12 and the casing 11, and an open oil tank 13 is connected to the upper end of the electric heater 12, The electric heater 12 is in direct contact with the oil tank 13. The direct contact between the electric heater 12 and the oil tank is to accelerate the heating rate of the heat transfer oil; Fan 5 is connected on the casing 11, and the fan 5 communicates with the inner cavity of the casing 11. The end of the air intake pipe 3 is connected to the oven 2. The hot air is thrown into the oven 2 under the action of the centrifugal force of the blades of the blower fan 5; The air inlet duct 3 with hot air is installed at the lower end of the oven 2, and the outlet duct 3 leading to the heating device 1 for the residual hot air in the oven is set at the upper end of the oven 2 in order to allow the hot air to achieve food, The baking of chemical and other raw materials and products can also speed up the circulation of hot air in the oven 2 with the help of the rising trend of hot air. In addition, the air outlet pipe 3 guides the residual hot air in the oven 2 back to the heating device 1, which reduces the heat loss and improves the utilization rate of heat. At the same time, because the intake of cold air outside the system is reduced, it is beneficial to ensure the stability of the temperature of the hot air in the oven. .

Preferably, the housing 11 includes an inner layer 112 and an outer layer 113, and a heat insulating material is filled between the inner layer 112 and the outer layer 113. The use of thermal insulation material reduces the loss of heat in the housing 11 and improves the utilization rate of heat.

Further, the oven 2 includes an oven inner layer 22 and an oven outer layer 23, and the space between the oven inner layer 22 and the oven outer layer 23 is filled with thermal insulation materials. The use of thermal insulation material reduces the loss of heat in the oven 2 and improves the utilization rate of heat.

Further, the oven 2 is provided with an air distribution plate 6 at the inlet duct 3 . There are many small holes on the surface of the air distribution plate 6, so that the hot air in the air intake duct 3 is evenly passed into the oven 2 after being buffered by the air distribution plate 4, and the impact and damage of the product caused by the impact of the hot air velocity are avoided.

Preferably, the inner wall of the oven 2 is provided with a bracket 21 for placing a baking plate. The use of the support 21 facilitates the picking and placing of the products to be baked.

The working principle of the hot air circulation oven of the present utility model is as follows: first place the baking pan for raw materials or products to be baked on the bracket 21 in the oven 2, close the oven 2, and then start the electric heater 12 to start heating the oil tank 13. The heat transfer oil is heated, and when the heat transfer oil heats the air in the shell 11 to the required temperature, the fan 5 is turned on, and the hot air in the shell 11 is blown into the oven 2, and the hot air flows from bottom to top in the oven 2 At the same time, the residual hot air passing through the baking tray is guided back to the housing 11 through the outlet pipe 4 under the promotion of the hot air at the lower end and the suction force of the fan 5 in the housing 11, and the residual hot air that is guided back to the housing 11 continues to be heated and transported to the In the oven 2, it circulates like this until the product to be dried is dried.

The above is only a preferred embodiment of the utility model, and the utility model is not limited to the above-mentioned embodiment, as long as it achieves the technical effect of the utility model by the same or similar means, it should belong to the protection of the utility model scope.

Claims (5)

1. heated-air circulation oven; Comprise heater (1) and baking oven (2), it is characterized in that: said heater (1) comprises housing (11), and the outer wall of said housing (11) is provided with air inlet (111); Housing (11) inside is equipped with electric heater (12); Leave air duct between electric heater (12) and the housing (11), the upper end of said electric heater (12) is connected with uncovered fuel tank (13), and electric heater (12) directly contacts with fuel tank (13); The side wall lower ends of said housing (1) is provided with admission line (3); Admission line (3) is connected on the housing (11) through blower fan (5); Blower fan (5) communicates with the housing inner chamber; The end of said admission line (3) is connected on the baking oven (2), and said baking oven (2) is connected the upper end of housing (11) sidewall through outlet pipe (4).

2. a kind of heated-air circulation oven according to claim 1 is characterized in that: said housing (11) comprises internal layer (112) and outer (113), has filled up the heat-insulation and heat-preservation material between internal layer (112) and outer (113).

3. a kind of heated-air circulation oven according to claim 1 is characterized in that: said baking oven (2) comprises baking oven internal layer (22) and baking oven outer (23), and baking oven internal layer (22) and baking oven have filled up the heat-insulation and heat-preservation material between outer (23).

4. a kind of heated-air circulation oven according to claim 1 is characterized in that: said baking oven (2) is positioned at admission line (3) and locates to be provided with split-wind plate (6).

5. a kind of heated-air circulation oven according to claim 1 is characterized in that: the inwall of said baking oven (2) is provided with the support (21) of placing drying-plate.

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