Drying box based on infrared radiation and heat pump combined heating

Abstract

The utility model discloses a drying box based on combined heating of infrared radiation and a heat pump, which comprises a box body, a T-shaped heat insulation chamber is arranged in the box body and divides the box body into a heating drying bin, a first circulating bin and a second circulating bin, an electric heating pipe is detachably arranged at the bottom in the heating drying bin, a material tray loaded with materials is detachably arranged above the electric heating pipe, and the first circulating bin and the second circulating bin are arranged in the box body. The heating and drying bin is communicated with the first circulating bin and the second circulating bin, a first air blower exhausting air outwards is arranged on the side wall of the first circulating bin, a second air blower supplying air into the second circulating bin is arranged on the side wall of the second circulating bin, a compressor and an evaporator are arranged in the first circulating bin, and a condenser is arranged in the second circulating bin. The evaporator, the compressor and the condenser are sequentially communicated through an electromagnetic four-way valve, and an expansion valve is arranged between the condenser and the evaporator. In the process of heating and drying materials, mixed gas with waste heat discharged from the drying chamber is firstly subjected to heat absorption and cooling effects of the evaporator of the heat pump system and then is discharged out of the drying box, so that the purpose of fully utilizing heat energy is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of drying equipment, in particular to a drying box based on infrared radiation and heat pump combined heating. Background Art

[0002] A drying oven is a device that heats and dries objects. Most drying ovens in the prior art dry objects by heating and heating with electric heating tubes. For example, the invention patent with publication number CN118168292A discloses an electric heating blast drying oven for ceramic cores, which heats the air in the drying oven by arranging a heating coil in the drying oven, and accelerates the hot air flow through a hair dryer, and finally discharges the air from the exhaust valve to heat and dry the ceramic core in the oven. However, the air discharged from the exhaust valve usually carries a lot of waste heat, which is directly discharged into the atmosphere, resulting in a large amount of heat energy waste. And it will make the drying process energy consumption higher. Utility Model Content

[0003] The utility model provides a drying box based on infrared radiation and heat pump combined heating, which achieves the purpose of fully utilizing heat energy by first allowing mixed gas with residual heat discharged from a drying chamber to pass through the heat absorption and cooling effect of an evaporator of a heat pump system and then be discharged outside the drying box.

[0004] In order to achieve these purposes and other advantages according to the utility model, a drying box based on combined heating of infrared radiation and heat pump is provided, comprising:

[0005] A box body is provided with a T-shaped insulation chamber inside to divide it into a heating and drying bin, a first circulation bin and a second circulation bin. An electric heating tube is detachably provided at the bottom of the heating and drying bin, and a material tray carrying materials is detachably provided above the electric heating tube. The heating and drying bin is connected with both the first circulation bin and the second circulation bin. A first blower for exhausting air outward is provided on the side wall of the first circulation bin, and a second blower for supplying air to the inside of the second circulation bin is provided on the side wall of the second circulation bin. A compressor and an evaporator are provided in the first circulation bin, and a condenser is provided in the second circulation bin. The evaporator, the compressor and the condenser are connected in sequence through an electromagnetic four-way valve, and an expansion valve is provided between the condenser and the evaporator.

[0006] Preferably, in the drying box based on combined heating of infrared radiation and heat pump, a horizontal partition plate is provided in the heating and drying chamber to separate it into a drying chamber and a heating chamber distributed up and down, a plurality of ventilation holes are provided on the partition plate, the material tray is detachably provided in the drying chamber, and the electric heating tube is detachably provided at the bottom of the heating chamber.

[0007] Preferably, in the drying box based on combined heating by infrared radiation and heat pump, a plurality of horizontal shelf plates distributed vertically are provided in the drying chamber, and the material trays are placed on the shelf plates.

[0008] Preferably, in the drying box based on combined heating of infrared radiation and heat pump, a first support frame is provided above and below the shelf plate, a carbon fiber infrared heating plate is detachably provided on the first support frame, and the material tray is located between the shelf plate and the carbon fiber infrared heating plate located above the shelf plate.

[0009] Preferably, in the drying box based on combined heating of infrared radiation and heat pump, a first air outlet is provided on the top wall of the drying chamber, a first air inlet is provided on the top wall of the first circulation bin, and the first air outlet is connected to the first air inlet through a recovery pipe; a second air inlet is provided on the side wall of the heating chamber, a second air outlet is provided on the side wall of the second circulation bin, and the second air outlet is connected to the second air inlet through a heating pipe.

[0010] Preferably, in the drying box based on combined heating by infrared radiation and heat pump, a second support frame is provided in the heating chamber, and the electric heating tube is placed on the second support frame.

[0011] Preferably, in the drying box based on combined heating by infrared radiation and heat pump, a horizontal first guide plate is provided above the electric heating tube in the heating chamber.

[0012] Preferably, in the drying box based on combined heating by infrared radiation and heat pump, a vertical second guide plate is provided between the condenser and the second blower in the second circulation chamber.

[0013] Preferably, in the drying box based on combined heating by infrared radiation and heat pump, the heat-insulating chamber is composed of a pair of L-shaped connectors formed by splicing horizontal plates and vertical plates, and a vertical spliced ​​plate connected to the box wall.

[0014] Preferably, in the drying box based on combined heating by infrared radiation and heat pump, the first circulation chamber is connected to the first blower through a ventilation duct.

[0015] The utility model at least includes the following beneficial effects: in the utility model, a T-shaped heat-insulating chamber is arranged in the box body to divide it into a heating and drying bin, a first circulation bin and a second circulation bin; an electric heating pipe and a material tray carrying materials are arranged in the heating and drying bin; the heating and drying bin is connected with the first circulation bin and the second circulation bin; a first blower for exhausting air outward is arranged on the side wall of the first circulation bin; a second blower for supplying air to the inside of the second circulation bin is arranged on the side wall of the second circulation bin; a compressor and an evaporator are arranged in the first circulation bin; a condenser is arranged in the second circulation bin; the evaporator, the compressor and the condenser are connected in sequence through an electromagnetic four-way valve; an expansion valve is also arranged between the condenser and the evaporator to perform a heating and drying process on the material. In the process, the second blower draws outside air into the second circulation bin, and then the working condenser releases heat to preheat the air. The preheated air then enters the heating and drying bin and is heated by the electric heating tube, and then rises and passes through the material in the material tray to heat and dry the material. Then, the preheated air enters the first circulation bin together with the water vapor discharged by the material itself, and is cooled by the heat absorption of the working evaporator in the first circulation bin, and is finally sucked and discharged to the outside by the first blower. In this process, the evaporator can absorb the waste heat of the gas discharged from the heating and drying bin into the first circulation bin, and then discharge the gas from the first circulation bin to the outside, which not only reduces the waste of heat energy, but also reduces the power consumption of the evaporator when it is working, effectively improving the energy utilization rate.

[0016] Other advantages, objectives and features of the present invention will be embodied in part through the following description, and in part will be understood by those skilled in the art through research and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the internal structure of a drying box based on combined heating of infrared radiation and heat pump in one of the technical solutions of the utility model;

[0018] Figure 2 It is a schematic diagram of the three-dimensional structure of a drying box based on combined heating of infrared radiation and heat pump in one of the technical solutions of the utility model;

[0019] Figure 3 This is a schematic diagram of the structure of a shelf in one of the technical solutions of the utility model;

[0020] Among them, 1-first blower, 2-ventilation duct, 3-compressor, 4-evaporator, 5-first air inlet, 6-first circulation bin, 7-drying chamber, 8-recovery pipe, 9-first air outlet, 10-box, 11-material tray, 12-temperature and humidity sensor, 13-partition plate, 14-air vent, 15-first guide plate, 16-second air inlet, 17-electric heating tube, 18-heating pipe, 19-moving wheel, 20-second support frame, 21-heating chamber, 22-insulation chamber, 23-condenser, 24-second air outlet, 25-second guide plate, 26-second blower, 27-second circulation bin, 28-observation window, 29-openable door panel, 30-carbon fiber infrared heating plate, 31-support mesh plate, 32-shelf plate, 33-connecting rod. DETAILED DESCRIPTION

[0021] The present invention will be further described in detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0022] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0023] It should be noted that the experimental methods described in the following embodiments are conventional methods unless otherwise specified, and the reagents and materials can be obtained from commercial sources unless otherwise specified; in the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "set" should be understood in a broad sense, for example, they can be fixedly connected, set, or detachably connected, set, or connected and set in one piece. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood in specific circumstances. The orientation or position relationship indicated by the terms "transverse", "longitudinal", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc. is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model.

[0024] like Figure 1 , Figure 2 , Figure 3 As shown, the utility model provides a drying oven based on infrared radiation and heat pump combined heating, comprising:

[0025] The box body 10 is provided with a T-shaped insulation chamber 22 inside to divide it into a heating and drying bin, a first circulation bin 6, and a second circulation bin 27. The bottom of the heating and drying bin is detachably provided with an electric heating tube 17, and the upper part of the electric heating tube 17 is detachably provided with a material tray 11 carrying materials. The heating and drying bin is connected with the first circulation bin 6 and the second circulation bin 27. The side wall of the first circulation bin 6 is provided with a first blower 1 for exhausting air outward, and the side wall of the second circulation bin 27 is provided with a second blower 26 for supplying air to the inside thereof. The first circulation bin 6 is provided with a compressor 3 and an evaporator 4, and the second circulation bin 27 is provided with a condenser 23. The evaporator 4, the compressor 3, and the condenser 23 are connected in sequence through an electromagnetic four-way valve, and an expansion valve is provided between the condenser 23 and the evaporator 4.

[0026] The drying box based on combined heating of infrared radiation and heat pump provided by the technical solution comprises a box body 10, which can be a rectangular parallelepiped, and a T-shaped heat-insulating chamber 22 is arranged in the box body 10, and the heat-insulating chamber 22 divides the box body 10 into a heating and drying chamber, a first circulation chamber 6, and a second circulation chamber 27. The T-shaped cavity inside the heat-insulating chamber 22 separates the three chambers, and the interior thereof can be filled with heat-insulating materials to reduce the thermal coupling between the three chambers and improve the heating efficiency. An electric heating tube 17 for heating is detachably arranged at the bottom of the heating and drying chamber, and the conducting wire of the electric heating tube 17 can be connected to a switch after passing through the threading hole on the side wall of the heating and drying chamber, and the threading hole is at An elastic sealing plug can be provided to prevent the electric wire from shaking or falling out of the hole. A material tray 11 loaded with materials can be detachably provided in the heating and drying chamber. The material tray 11 is located above the electric heating tube 17, which helps to heat the materials quickly. The heating and drying chamber is connected to the first circulation chamber 6 and the second circulation chamber 27. A first blower 1 connected to the inside of the first circulation chamber 6 is provided on the side wall of the first circulation chamber 6, which is used to discharge the air in the first circulation chamber 6. A second blower 26 connected to the inside of the second circulation chamber 27 is provided on the side wall of the second circulation chamber 27, which is used to send outside air into the second circulation chamber 27, which can also accelerate the air flow in the box body 10 and improve The material drying speed is increased, and a filter is provided at the air inlet of the second blower 26 for removing impurities from the air. A compressor 3, an evaporator 4, an electromagnetic four-way valve, and an expansion valve are provided in the first circulation bin 6. A condenser 23 is provided in the second circulation bin 27. The evaporator 4, the compressor 3, and the condenser 23 are connected in sequence through the electromagnetic four-way valve. The expansion valve is located between the condenser and the evaporator 4 and is connected to both of them. Specifically, the refrigerant output end of the compressor 3 is connected to the input end of the electromagnetic four-way valve through a pipeline, and the output ends on both sides of the electromagnetic four-way valve are respectively connected to the output end of the evaporator 4 and the input end of the condenser 23 through pipelines. The outlet end is connected to the input end of the gas-liquid separator on the compressor 3 through a pipeline, and the output end of the condenser 23 and the input end of the evaporator 4 are respectively connected to the input end and the output end of the expansion valve through pipelines to form a heat pump system. The hot air flowing from the heating and drying bin into the first circulation bin 6 can provide heat for the evaporator 4 to work, and then be discharged to the outside of the box 10, that is, the heat of the air used to dry the material can be effectively recycled by the evaporator 4. The air entering the second circulation bin 27 from the outside is preheated by the working condenser 23, and then enters the heating and drying bin for reheating, thereby increasing the heating speed of the air in the box 10 and thereby improving the material drying efficiency.

[0027] The working principle of the drying box based on combined heating of infrared radiation and heat pump provided by the technical solution is as follows: during the drying process of the material, the heat pump system composed of the compressor 3, the evaporator 4, the electromagnetic four-way valve, the expansion valve, the condenser 23 and the electric heating tube 17 work simultaneously, and the outside air is sucked into the second circulation bin 27 by the second blower 26, and then enters the heating and drying bin after being preheated by the condenser 23, and then is heated by the electric heating tube 17 and rises to pass through the material in the material tray 11, heating and drying the material, and then enters the first circulation bin 6 together with the water vapor discharged by the material itself, and is sucked and discharged to the outside by the first blower 1 after being cooled by the evaporator 4 in the first circulation bin 6, and the air circulation process is repeated until the material is dry.

[0028] The utility model at least includes the following beneficial effects: a T-shaped heat-insulating chamber 22 is arranged in the box body 10 to divide it into a heating and drying bin, a first circulation bin 6, and a second circulation bin 27; an electric heating pipe 17 and a material tray 11 carrying materials are arranged in the heating and drying bin; the heating and drying bin is connected with the first circulation bin 6 and the second circulation bin 27; a first blower 1 for exhausting air outward is arranged on the side wall of the first circulation bin 6; a second blower 26 for supplying air to the inside of the second circulation bin 27 is arranged on the side wall of the second circulation bin 27; a compressor 3 and an evaporator 4 are arranged in the first circulation bin 6; a condenser 23 is arranged in the second circulation bin 27; the evaporator 4, the compressor 3, and the condenser 23 are connected in sequence through an electromagnetic four-way valve; an expansion valve is also arranged between the condenser 23 and the evaporator 4 to heat and dry the materials During the drying process, the second blower 26 draws outside air into the second circulation bin 27, and then the working condenser 23 releases heat to preheat the air. The preheated air then enters the heating and drying bin and is heated by the electric heating tube 17, and then rises and passes through the material in the material tray 11 to heat and dry the material, and then enters the first circulation bin 6 with the water vapor discharged by the material itself, and is cooled by the heat absorption effect of the working evaporator 4 in the first circulation bin 6, and then is sucked and discharged to the outside by the first blower 1. In this process, the evaporator 4 can absorb the waste heat of the mixed gas discharged from the heating and drying bin into the first circulation bin 6, and then discharge the mixed gas from the first circulation bin 6 to the outside, which not only reduces the waste of heat energy, but also reduces the power consumption of the evaporator 4 when it is working, and effectively improves the energy utilization rate;

[0029] The T-shaped heat-insulating chamber 22 separates the first circulation bin 6, the second circulation bin 27, and the heating and drying chamber 7, which can effectively reduce the thermal coupling between the three bins and improve the heating efficiency; the condenser 23 releases heat to preheat the air entering the second circulation bin 27 from the outside, and then heats the air by the electric heating tube 17, which effectively improves the heating efficiency; the electric heating tube 17 and the material tray 11 are detachably arranged in the heating and drying bin, which is convenient for disassembly and assembly; the first blower 1 and the second blower 26 accelerate the air flow and improve the drying efficiency.

[0030] In another technical solution, Figure 1 As shown, in the drying box based on combined heating of infrared radiation and heat pump, a horizontal partition plate 13 is provided in the heating and drying chamber to separate it into a drying chamber 7 and a heating chamber 21 distributed up and down, and a plurality of vents 14 are provided on the partition plate 13. The material tray 11 is detachably provided in the drying chamber 7, and the electric heating pipe 17 is detachably provided at the bottom of the heating chamber 21. The partition plate 13 prevents the material from directly contacting the motor heat pipe, which is damaged by excessive temperature rise; the vents 14 are used for air circulation.

[0031] In another technical solution, Figure 1 , Figure 3 As shown, in the drying box based on infrared radiation and heat pump combined heating, a plurality of horizontal shelf plates 32 distributed vertically are arranged in the drying chamber 7, and the material tray 11 is placed on the shelf plates 32. It is convenient to put and take the material tray 11; the material tray 11 can increase the material spreading area and improve the drying speed.

[0032] In another technical solution, Figure 1 , Figure 3 As shown, in the drying box based on infrared radiation and heat pump combined heating, the first support frame is provided above and below the shelf board 32, and the first support frame is detachably provided with a carbon fiber infrared heating plate 30, and the material tray 11 is located between the shelf board 32 and the carbon fiber infrared heating plate 30 located above the shelf board 32. Specifically, the first support frame includes a horizontal support mesh plate 31, and the edge of the support mesh plate 31 is provided with a plurality of vertical connecting rods 33 connected to the shelf board 32, and the carbon fiber infrared heating plate 30 is placed on the support mesh plate 31. The electric wire of the carbon fiber infrared heating plate 30 can be connected to the switch after passing through the threading hole on the side wall of the drying chamber 7, and an elastic sealing plug can be provided at the threading hole to prevent the electric wire from shaking and falling out of the hole; the carbon fiber infrared heating plate 30 uses infrared radiation to heat the material. According to the different periods, different states and different needs of the material drying, the carbon fiber infrared heating plate, the heat pump system and the electric heating tube are adaptively selected to heat and dry the material, forming the complementary advantages of different heat sources, improving the material drying efficiency and effect, and ensuring the material quality.

[0033] In another technical solution, Figure 1 , Figure 2As shown, in the drying box based on combined heating of infrared radiation and heat pump, the top wall of the drying chamber 7 is provided with a first air outlet 9, the top wall of the first circulation bin 6 is provided with a first air inlet 5, and the first air outlet 9 is connected to the first air inlet 5 through a recovery pipe 8; the side wall of the heating chamber 21 is provided with a second air inlet 16, the side wall of the second circulation bin 27 is provided with a second air outlet 24, and the second air outlet 24 is connected to the second air inlet 16 through a heating pipe 18. The recovery pipe 8 and the heating pipe 18 are both made of insulating materials; both ends of the recovery pipe 8 and the heating pipe 18 are detachably connected to the side wall of the box body 10, which is convenient for disassembly, assembly, maintenance and replacement; the recovery pipe 8 and the heating pipe 18 occupy less space than the open air duct, which can increase the processing capacity of one work and optimize the structure of the drying box.

[0034] In another technical solution, Figure 1 As shown, in the drying oven based on combined heating of infrared radiation and heat pump, a second support frame 20 is provided in the heating chamber 21, and the electric heating pipe 17 is placed on the second support frame 20. The second support frame 20 is provided with an annular enclosure surrounding the electric heating pipe 17 to prevent the motor heat pipe from moving at will; the motor heat pipe is placed on the second support frame 20 for easy disassembly and assembly.

[0035] In another technical solution, Figure 1 As shown, in the drying box based on combined heating of infrared radiation and heat pump, a horizontal first guide plate 15 is provided above the electric heating tube 17 in the heating chamber 21. The contact time between the air entering the heating chamber 21 from the second circulation chamber 27 and the electric heating tube 17 is increased, so that the air is heated more fully.

[0036] In another technical solution, Figure 1 As shown, in the drying box based on combined heating of infrared radiation and heat pump, a vertical second guide plate 25 is provided between the condenser 23 and the second blower 26 in the second circulation chamber 27. The contact time between the air entering the second circulation chamber 27 from the outside and the condenser 23 is increased to fully preheat the air.

[0037] In another technical solution, Figure 1As shown, in the drying box based on combined heating of infrared radiation and heat pump, the heat-insulating chamber 22 is composed of a pair of L-shaped connectors formed by splicing horizontal plates and vertical plates, and a vertical panel connected to the wall of the box body 10. Specifically, the side edge of one connector is connected to the front and rear side walls of the box body 10, the top of the vertical plate of one connector is connected to the top wall of the box body 10, the horizontal plate of one connector is connected to the side wall provided with the first blower 1, and the other connector is symmetrically arranged with the other connector up and down, that is, the side edge of the other connector is connected to the front and rear side walls of the box body 10, the top of the vertical plate of the other connector is connected to the bottom wall of the box body 10, and the horizontal plate of the other connector is connected to the side wall provided with the second blower 26, and the panel is located on the side of the connector without the horizontal plate and is connected to both the top wall and the bottom wall of the box body 10; it is easy to make.

[0038] In another technical solution, Figure 1 , Figure 2 As shown, in the drying box based on combined heating of infrared radiation and heat pump, the first circulation chamber 6 is connected to the first blower 1 through a ventilation duct 2. The inlet end of the ventilation duct 2 is detachably connected to the side wall of the first circulation chamber 6, and the outlet end is detachably connected to the first blower 1, which is convenient for disassembly, assembly, maintenance and replacement of the ventilation duct 2; the outlet of the ventilation duct 2 can be set at a distance from the box body 10, so that the discharged cold air is away from the second blower 26 to avoid thermal short-circuit phenomenon.

[0039] In another technical solution, Figure 1 As shown, in the drying box based on infrared radiation and heat pump combined heating, a temperature and humidity sensor 12 is provided on the side wall of the drying chamber 7. The temperature and humidity in the drying chamber 7 are constantly detected to understand the drying condition of the material.

[0040] In another technical solution, in the drying box based on combined heating of infrared radiation and heat pump, a controller and a touch screen are arranged on the side wall of the box body, and the controller is connected to the touch screen, the electromagnetic four-way valve, the switch of the second blower, the switch of the first blower, and the temperature and humidity sensor. Real-time monitoring and intelligent control of the working state of the drying box are realized; the temperature and humidity sensor transmits the temperature and humidity data of the drying room to the controller in real time, and the controller displays the processed data on the touch screen after processing the received data. When the measured data is abnormal, the controller adjusts the operation of the compressor, the electromagnetic four-way valve, the first blower, and the second blower according to the abnormal data, and the staff can also manually control the operation of the compressor, the electromagnetic four-way valve, the first blower, and the second blower through the touch screen.

[0041] In another technical solution, Figure 2As shown, in the drying box based on combined heating of infrared radiation and heat pump, one side wall of the box body 10 is provided with an openable door panel 29, and an observation window 28 is provided on the openable door panel 29. The openable door panel 29 facilitates the staff to observe the inside of the box body 10; the observation window 28 facilitates the staff to directly observe the drying condition of the material in the drying room to prevent accidents during the drying process of the material.

[0042] In another technical solution, Figure 1 , Figure 2 As shown, in the drying box based on infrared radiation and heat pump combined heating, a plurality of moving wheels 19 are arranged at the bottom of the box body 10. The moving wheels 19 can be universal wheels with a brake function, which is convenient for the staff to move the drying box.

[0043] In another technical solution, in the drying box based on combined heating of infrared radiation and heat pump, the outer wall of the box body is provided with a heat-insulating layer, which can accelerate the temperature rise in the box body and improve the heating and drying efficiency of the material.

[0044] The number of devices and processing scales described here are used to simplify the description of the utility model. Applications, modifications and variations of the utility model are obvious to those skilled in the art.

[0045] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A drying oven based on combined heating of infrared radiation and heat pump, characterized in that: include: A box body is provided with a T-shaped insulation chamber inside to divide it into a heating and drying bin, a first circulation bin and a second circulation bin. An electric heating tube is detachably provided at the bottom of the heating and drying bin, and a material tray carrying materials is detachably provided above the electric heating tube. The heating and drying bin is connected with both the first circulation bin and the second circulation bin. A first blower for exhausting air outward is provided on the side wall of the first circulation bin, and a second blower for supplying air to the inside of the second circulation bin is provided on the side wall of the second circulation bin. A compressor and an evaporator are provided in the first circulation bin, and a condenser is provided in the second circulation bin. The evaporator, the compressor and the condenser are connected in sequence through an electromagnetic four-way valve, and an expansion valve is provided between the condenser and the evaporator.

2. The drying oven based on combined heating of infrared radiation and heat pump as claimed in claim 1, characterized in that: The heating and drying chamber is provided with a horizontal partition plate to divide it into a drying chamber and a heating chamber which are distributed vertically. The partition plate is provided with a plurality of ventilation holes. The material tray is detachably provided in the drying chamber, and the electric heating tube is detachably provided at the bottom of the heating chamber.

3. The drying oven based on combined heating of infrared radiation and heat pump as claimed in claim 2, characterized in that: The drying chamber is provided with a plurality of horizontal shelf plates distributed up and down, and the material trays are placed on the shelf plates.

4. The drying oven based on combined heating of infrared radiation and heat pump as claimed in claim 3, characterized in that: A first support frame is arranged above and below the shelf plate, and a carbon fiber infrared heating plate is detachably arranged on the first support frame. The material tray is located between the shelf plate and the carbon fiber infrared heating plate located above the shelf plate.

5. The drying oven based on combined heating of infrared radiation and heat pump as claimed in claim 3, characterized in that: A first air outlet is arranged on the top wall of the drying chamber, a first air inlet is arranged on the top wall of the first circulation bin, and the first air outlet is connected to the first air inlet through a recovery pipe; a second air inlet is arranged on the side wall of the heating chamber, a second air outlet is arranged on the side wall of the second circulation bin, and the second air outlet is connected to the second air inlet through a heating pipe.

6. The drying oven based on combined heating of infrared radiation and heat pump as claimed in claim 5, characterized in that: A second support frame is arranged in the heating chamber, and the electric heating tube is placed on the second support frame.

7. The drying oven based on combined heating of infrared radiation and heat pump as claimed in claim 6, characterized in that: In the heating chamber, a horizontal first guide plate is arranged above the electric heating tube.

8. The drying oven based on combined heating of infrared radiation and heat pump as claimed in claim 1, characterized in that: In the second circulation chamber, a vertical second guide plate is arranged between the condenser and the second blower.

9. The drying oven based on combined heating of infrared radiation and heat pump as claimed in claim 1, characterized in that: The heat-insulating chamber is composed of a pair of L-shaped connecting pieces formed by splicing horizontal plates and vertical plates, and a vertical splicing plate connected to the box wall.

10. The drying oven based on combined heating of infrared radiation and heat pump according to claim 1, characterized in that: The first circulation chamber is connected to the first blower through a ventilation duct.

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