Moisturizing and heating oven for agricultural product processing

Abstract

The utility model discloses a moisturizing and heating oven for agricultural product processing, which relates to the technical field of heating equipment and comprises an oven body and a material conveying component penetrating through the oven body, the oven body is sequentially divided into a steam preheating and humidifying section, a microwave rapid heating section and an infrared temperature control section along the material conveying direction, a steam spraying pipe is arranged in the steam preheating and humidifying section, a plurality of microwave generating devices are installed on the box body wall of the microwave rapid heating section, microwave shielding transition bins only allowing the material conveying assembly to penetrate through are arranged at the two ends of the section respectively, and the infrared temperature control section is provided with an infrared heating assembly. The damp-heat circulation assembly comprises a circulation fan installed on the box body of the infrared heating section, the air inlet end of the circulation fan is communicated with an inner cavity of the infrared temperature control section, and the air outlet end of the circulation fan is communicated to the steam preheating and humidifying section through a circulation pipeline. According to the utility model, a sectional type temperature and humidity independent control and damp-heat circulation system is adopted, so that the processing efficiency and quality are improved, and the microwave leakage risk is reduced at the same time.

Description

Technical Field

[0001] The utility model relates to the technical field of heating equipment, in particular to a humidity-preserving heating oven for agricultural product processing. Background Technique

[0002] In the field of agricultural product processing, the heating treatment of materials needs to take into account efficiency, uniformity and quality preservation, and accurate control of temperature and humidity is crucial. Traditional steam heating relies on the release of latent heat to achieve heat conduction, with low heating efficiency and insufficient penetration depth. The surface of the material is easily over-wetted while the internal temperature rises laggingly, resulting in an extended processing cycle and a large equipment volume, making it difficult to meet the requirements of continuous production. Although single microwave heating can achieve volumetric heating, it lacks means for humidity control, with a high moisture loss rate of the material, and is prone to skin cracking or internal charring. Infrared heating only acts on the surface layer of the material, with poor heating uniformity for thick-layer materials and unable to meet the requirements of deep processing.

[0003] The material heating system disclosed in CN222840477U improves the heating efficiency through microwave volumetric heating, infrared radiation enhancement and hot water atomization convection. However, in practical applications, the following optimization space is still found: the functions of the microwave and infrared heating areas overlap, there is a lack of gradient temperature field design, the sensor points are concentrated in a single temperature zone, it is difficult to achieve multi-parameter linkage control, and the control accuracy is greatly affected. In addition, the microwave heating component is close to the material inlet and outlet, posing a risk of microwave leakage. Content of the Utility Model

[0004] Aiming at the problems existing in the above-mentioned prior art, the utility model provides a humidity-preserving heating oven for agricultural product processing to solve the technical problems of low heating efficiency, insufficient temperature and humidity control accuracy, high risk of microwave leakage and serious energy waste of traditional equipment.

[0005] The technical solution adopted by the present utility model is as follows: A humidity-preserving heating oven for agricultural product processing, comprising an oven body and a material conveying assembly. The material conveying assembly penetrates through the oven body. The oven body is sequentially divided into a steam preheating and humidifying section, a microwave rapid heating section, and an infrared temperature control section along the material transmission direction. A steam spray pipe is provided in the steam preheating and humidifying section, and the steam spray pipe is connected to an external steam generator through a pipeline. A plurality of microwave generating devices are installed on the box body wall of the microwave rapid heating section, and microwave shielding transition bins for only allowing the material conveying assembly to pass through are respectively arranged at both ends of the section where the microwave generating devices are located. An infrared heating assembly is provided in the infrared temperature control section. Further, a humid-heat circulation assembly is included. The humid-heat circulation assembly comprises a circulation fan installed on the box body of the infrared heating section. The air inlet end of the circulation fan is communicated with the inner cavity of the infrared temperature control section, and the air outlet end is communicated with the steam preheating and humidifying section through a circulation pipeline. Shielding doors are respectively arranged at the feeding port of the steam preheating and humidifying section and the discharging port of the infrared temperature control section. The shielding doors are connected with driving cylinders to drive the shielding doors to open and close. The material conveying assembly adopts a step-by-step movement mode. When the material conveying assembly stops, the shielding doors close, and when the material conveying assembly moves, the shielding doors open.

[0006] Further, the air inlet end of the circulation fan of the humid-heat circulation assembly is located above the material conveying assembly, and the steam spray pipe and the air outlet end of the circulation fan are located below the material conveying assembly.

[0007] Further, a plurality of condensate drainage holes are provided on the bottom plate of the oven body. The plurality of condensate drainage holes are distributed at the bottoms of the steam preheating and humidifying section, the microwave rapid heating section, and the infrared temperature control section. The condensate drainage holes are connected to a drain pipe.

[0008] Further, a spray pipe for flushing the carrier of the material conveying assembly is provided in the steam preheating and humidifying section. The spray pipe is located above the material conveying assembly and is connected to an external high-pressure water source through a pipeline.

[0009] Further, the microwave generating devices in the microwave rapid heating section are distributed on the top wall of the box body above the material conveying assembly and on the side walls of the box body on both sides below the material conveying assembly. The microwave generating devices on the two side walls of the box body are installed in an inclined manner, and the inclination angle makes the radiation direction of the microwave generating devices face upward.

[0010] Further, an exhaust heat fan is further included. The exhaust heat fan is installed between the microwave rapid heating section and the infrared temperature control section. The air inlet end of the exhaust heat fan is communicated with the inner cavity of the box body, and the air outlet end is communicated with the outside.

[0011] Furthermore, the infrared heating component includes a moving rack, multiple infrared heating tubes respectively arranged above and below the material conveying component, and a driving unit. Both ends of the infrared heating tubes are fixedly connected to the moving rack, and the driving unit is connected to the moving rack and drives the moving rack to reciprocate along the material conveying direction.

[0012] Furthermore, an infrared thermometer and a humidity sensor are distributed and installed inside the oven body. The infrared thermometer and the humidity sensor are electrically connected to the main control system, and the main control system dynamically adjusts the output power of the steam generator, the radiation intensity of the microwave generating device, and the working temperature of the infrared heating component according to the data of the infrared thermometer and the humidity sensor.

[0013] The beneficial effects of the present utility model are as follows:

[0014] (1) The present utility model adopts gradient temperature and humidity control. The phase change heat transfer in the steam preheating and humidifying section is used to supplement the moisture on the surface of the material, avoiding the hardening of the skin. The microwave heating section promotes the uniform migration of internal moisture, and the infrared heating section precisely controls the surface temperature, forming a three-level treatment system of "moisture preservation - heat penetration - temperature control". The overall heating uniformity of the material is improved, effectively avoiding local overheating;

[0015] (2) The steam spray pipe and the closed wet heat circulation component work together to realize the recycling of the hot and humid air in the cavity, reducing heat loss and lowering the energy consumption cost;

[0016] (3) By adopting a distributed sensing system and a segmented independent temperature and humidity control system, the temperature and humidity adjustment is more accurate and flexible;

[0017] (4) The microwave rapid heating section is arranged in the middle section of the oven. With the cooperation of the microwave shielding transition bin and the shielding door, the microwave leakage amount is reduced, ensuring the safety of the operators. Description of the Drawings

[0018] Figure 1 is a schematic diagram of the overall external shape of the present utility model.

[0019] Figure 2 is a schematic diagram of the internal structure of the moisture-preserving heating oven of the present utility model.

[0020] Figure 3 is a schematic diagram of the internal structure of the steam preheating and humidifying section of the present utility model.

[0021] Figure 4 is a schematic diagram of the structure of the microwave rapid heating section of the present utility model.

[0022] Figure 5 is a schematic cross-sectional structure diagram of the microwave rapid heating section of the present utility model.

[0023] Figure 6It is a schematic structural diagram of the infrared temperature control section of the present utility model.

[0024] Figure 7 It is a schematic structural diagram of the infrared heating component of the present utility model.

[0025] In the figure: oven body 100, steam preheating and humidifying section 101, microwave rapid heating section 102, infrared temperature control section 103, shielding door 200, circulation fan 301, circulation pipeline 302, exhaust heat fan 400, steam nozzle 500, spray pipe 600, microwave generating device 701, microwave shielding transition chamber 702, condensate drain hole 801, drain pipe 802, infrared heating component 900, moving rack 901, infrared heating tube 902, driving unit 903. Detailed implementation mode

[0026] To facilitate the understanding of the present utility model, the following will describe the present utility model more comprehensively and meticulously in conjunction with the specification drawings and preferred embodiments, but the protection scope of the present utility model is not limited to the following specific embodiments.

[0027] As Figure 1 、 Figure 2 shown, a humidity-preserving heating oven for agricultural product processing provided in this embodiment includes an oven body 100 and a material conveying component. The material conveying component penetrates through the oven body 100 to achieve continuous processing. The oven body 100 adopts a modular cavity structure and is sequentially divided into a steam preheating and humidifying section 101, a microwave rapid heating section 102, and an infrared temperature control section 103 along the material transmission direction.

[0028] Referring to Figure 3 , a steam nozzle 500 is provided in the steam preheating and humidifying section 101. The steam nozzle 500 is connected to an external steam generator through a pipeline, and steam is provided to the cavity to form a saturated humid and hot environment.

[0029] Referring to Figure 4 、 Figure 5 , a plurality of microwave generating devices 701 are installed on the box body wall of the microwave rapid heating section 102. In this embodiment, the microwave generating devices 701 are distributed on the top wall of the box body above the material conveying component and on the side walls of the box body on both sides below the material conveying component, and the microwave energy is introduced by the waveguide coupling method. The microwave generating devices 701 are installed on the side walls of the two box bodies in an inclined manner, and the inclination angle makes the radiation direction of the microwave generating devices 701 upward, so that the microwave field evenly covers the lower surface of the material, and at the same time, the influence of condensate on the microwave generating devices 701 below is avoided.

[0030] Microwave shielding transition chambers 702 are respectively arranged at both ends of the section where the microwave generating devices 701 are located. The microwave shielding transition chambers 702 only reserve rectangular channels adapted to the material transmission mechanism to reduce the microwave leakage amount.

[0031] See Figure 1 and Figure 2 Figure 2 , to further enhance electromagnetic protection, in this embodiment, shielding doors 200 are respectively provided at the feeding port of the steam preheating and humidifying section 101 and the discharging port of the infrared temperature control section 103. The shielding doors 200 are connected to driving cylinders to drive the opening and closing of the shielding doors 200. The material conveying assembly adopts a stepping movement mode. When the material conveying assembly stops, the shielding doors 200 close, and when the material conveying assembly moves, the shielding doors 200 open.

[0032] See Figure 6 Figure 6 , the infrared temperature control section 103 is provided with an infrared heating assembly 900; it further includes a wet and hot circulation assembly. The wet and hot circulation assembly includes a circulation fan 301 installed on the box body of the infrared heating section. The air inlet end of the circulation fan 301 is communicated with the inner cavity of the infrared temperature control section 103, and the air outlet end is communicated with the steam preheating and humidifying section 101 through a circulation pipe 302.

[0033] In this embodiment, the air inlet end of the circulation fan 301 of the wet and hot circulation assembly is located above the material conveying assembly, and the air outlet ends of the steam spray pipe 500 and the circulation fan 301 are located below the material conveying assembly. High-temperature saturated steam and the refluxed low-temperature moisture penetrate the material from below the material conveying assembly, and then flow back from above the material conveying assembly at the tail end of the oven body 100 to form a wet and hot air flow circulation path.

[0034] See Figure 5 Figure 5 , to realize the collection and discharge of condensed water, a plurality of condensed water drainage holes 801 are provided on the bottom plate of the oven body 100. The plurality of condensed water drainage holes 801 are distributed at the bottoms of the steam preheating and humidifying section 101, the microwave rapid heating section 102, and the infrared temperature control section 103. The condensed water drainage holes 801 are connected to a drainage pipe 802.

[0035] See Figure 3 Figure 3 , in this embodiment, a vehicle auxiliary cleaning function is integrated. A spray pipe 600 for flushing the vehicle of the material conveying assembly is provided in the steam preheating and humidifying section 101. The spraying range covers the entire transmission width. The spray pipe 600 is located above the material conveying assembly and is connected to an external high-pressure water source through a pipe to regularly flush the vehicle of the transmission mechanism (such as a mesh belt, a tray).

[0036] See Figure 2 and Figure 4 and Figure 5 Figure 5 , to realize the temperature and humidity control in the box body, in this embodiment, an exhaust heat fan 400 is installed on the box body between the microwave rapid heating section 102 and the infrared temperature control section 103. The air inlet end of the exhaust heat fan 400 is communicated with the inner cavity of the box body, and the air outlet end is communicated with the outside to discharge excessive heat accumulation, and cooperate with the temperature control system to realize precise temperature and humidity control.

[0037] See Figure 7 As shown in Figure 7 , to avoid local overheating, the infrared heating assembly 900 includes a moving frame 901, a plurality of infrared heating tubes 902 respectively arranged above and below the material conveying assembly, and a driving unit 903. Both ends of the infrared heating tubes 902 are fixedly connected to the moving frame 901. The driving unit 903 is connected to the moving frame 901 and drives the moving frame 901 to reciprocate along the material conveying direction, so as to optimize the heating uniformity of the material surface.

[0038] To achieve intelligent control and ensure the consistency of product quality, in this embodiment, infrared thermometers and humidity sensors are distributed and installed in the oven body 100. The infrared thermometers and humidity sensors are electrically connected to the main control system. The main control system dynamically adjusts the output power of the steam generator, the radiation intensity of the microwave generating device 701, and the working temperature of the infrared heating assembly 900 according to the data of the infrared thermometers and humidity sensors.

[0039] With the help of the teachings presented in the foregoing specification and the related drawings, those skilled in the art to which the present invention pertains will envision many modifications and other embodiments of the present invention. Accordingly, it is to be understood that the present invention is not limited to the specific embodiments disclosed, and that modifications and other embodiments are regarded as included within the scope of the appended claims. Although specific terms are employed herein, they are used in a generic and descriptive sense only and not for purposes of limitation.

Claims

1. A moisturizing and heating oven for agricultural product processing, comprising an oven body (100) and a material conveying assembly, the material conveying assembly penetrating through the oven body (100), characterized in that: The oven body (100) is sequentially divided into a steam preheating and humidifying section (101), a microwave rapid heating section (102), and an infrared temperature control section (103) along the material transmission direction; a steam spray pipe (500) is provided in the steam preheating and humidifying section (101), and the steam spray pipe (500) is connected to an external steam generator through a pipeline; a plurality of microwave generating devices (701) are installed on the box body wall of the microwave rapid heating section (102), and microwave shielding transition bins (702) through which only the material conveying assembly can pass are respectively arranged at both ends of the section where the microwave generating devices (701) are located; an infrared heating assembly (900) is provided in the infrared temperature control section (103); further included is a humid and hot circulation assembly, the humid and hot circulation assembly includes a circulation fan (301) installed on the box body of the infrared heating section, the air inlet end of the circulation fan (301) is communicated with the inner cavity of the infrared temperature control section (103), and the air outlet end is communicated with the steam preheating and humidifying section (101) through a circulation pipeline (302); shielding doors (200) are respectively arranged at the feed inlet of the steam preheating and humidifying section (101) and the discharge outlet of the infrared temperature control section (103), the shielding doors (200) are connected with driving cylinders to drive the shielding doors (200) to open and close, and the material conveying assembly adopts a step-by-step movement mode. When the material conveying assembly stops, the shielding doors (200) close, and when the material conveying assembly moves, the shielding doors (200) open.

2. The moisturizing and heating oven for agricultural product processing according to claim 1, characterized in that: The air inlet end of the circulation fan (301) of the humid and hot circulation assembly is located above the material conveying assembly, and the air outlet ends of the steam spray pipe (500) and the circulation fan (301) are located below the material conveying assembly.

3. A moisturizing and heating oven for agricultural product processing according to claim 1, characterized in that: A plurality of condensate drainage holes (801) are provided on the bottom plate of the oven body (100), and the plurality of condensate drainage holes (801) are distributed at the bottoms of the steam preheating and humidifying section (101), the microwave rapid heating section (102), and the infrared temperature control section (103). The condensate drainage holes (801) are connected to a drain pipe (802).

4. The moisturizing and heating oven for agricultural product processing according to claim 1, wherein: The steam preheating and humidifying section (101) is provided with a spray pipe (600) for flushing the carrier of the material conveying assembly. The spray pipe (600) is located above the material conveying assembly and is connected to an external high-pressure water source through a pipeline.

5. The humidity-preserving heating oven for agricultural product processing according to claim 1, characterized in that: The microwave generating devices (701) in the microwave rapid heating section (102) are distributed on the top wall of the box body above the material conveying assembly and on the side walls of the box body on both sides below the material conveying assembly. The microwave generating devices (701) on the two side walls of the box body are installed in an inclined manner, and the inclination angle makes the radiation direction of the microwave generating devices (701) face upward.

6. The moisturizing and heating oven for agricultural product processing according to claim 1, wherein: Further included is an exhaust heat fan (400). The exhaust heat fan (400) is installed between the microwave rapid heating section (102) and the infrared temperature control section (103). The air inlet end of the exhaust heat fan (400) is communicated with the inner cavity of the box body, and the air outlet end is communicated with the outside.

7. The moisturizing heating oven for agricultural product processing according to claim 1, wherein: The infrared heating component (900) includes a moving frame (901), a plurality of infrared heating tubes (902) respectively arranged above and below the material conveying component, and a driving unit (903). Both ends of the infrared heating tube (902) are fixedly connected to the moving frame (901), and the driving unit (903) is connected to the moving frame (901) and drives the moving frame (901) to reciprocate along the material conveying direction.

8. A moisturizing and heating oven for agricultural product processing according to any one of claims 1-7, characterized in that: An infrared thermometer and a humidity sensor are distributed and installed in the oven body (100). The infrared thermometer and the humidity sensor are electrically connected to the main control system. The main control system dynamically adjusts the output power of the steam generator, the radiation intensity of the microwave generating device (701), and the working temperature of the infrared heating component (900) according to the data of the infrared thermometer and the humidity sensor.

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