Internal circulation type multifunctional disinfection cabinet

Abstract

The utility model relates to the technical field of household appliances, in particular to an internal circulation type multifunctional disinfection cabinet, which is characterized in that a ventilation plate and a component mounting plate are arranged on an inner cavity, a heating device and an exhaust duct communicated with the heating device are arranged on the component mounting plate, and a first air opening and a second air opening positioned below the first air opening are formed in the ventilation plate; the heating device can extract air from the heating cavity through the first air opening and heat the air to form hot air flow, the opening of the exhaust air channel faces the second air opening, and the hot air flow flows back to the heating cavity through the exhaust air channel and the second air opening, so that airflow internal circulation is formed. The problems that in an existing disinfection cabinet, a hot air fan is used for extracting external air into the device to be heated, the heated air is fed into an inner cavity, but when the external environment temperature is low, the hot air fan is difficult to heat external cold air to meet the high-temperature disinfection temperature requirement, and the user experience feeling is affected are effectively solved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to an internal circulation multifunctional disinfection cabinet. Background Art

[0002] A disinfection cabinet is a device used to disinfect tableware, kitchen utensils and other utensils. It usually uses high-temperature heating, using a hot air blower to heat the air and transport it to the inner cavity, thereby achieving the effect of high-temperature disinfection. This high-temperature disinfection method can effectively kill most bacteria, viruses and other microorganisms, ensuring food safety and family health. With the improvement of people's health awareness and living standards, the disinfection of tableware, kitchen utensils and other items has become particularly important. Traditional disinfection methods may not be efficient or convenient enough, so disinfection cabinets came into being.

[0003] Most existing disinfection cabinets use a hot air blower to draw external air into the device for heating, and then send the heated air into the inner cavity. However, when the external ambient temperature is low, the hot air blower is difficult to heat the external cold air to a temperature that meets the high-temperature disinfection requirements, seriously affecting the user experience.

[0004] The utility model is proposed in view of the deficiencies in the prior art. Utility Model Content

[0005] In view of the problem that the existing disinfection cabinet mentioned above draws external air into the device for heating by using a hot air blower, and sends the heated air into the inner cavity, but when the external ambient temperature is low, the hot air blower is difficult to heat the external cold air to a temperature that meets the high-temperature disinfection requirements, affecting the user experience, the technical solution adopted by the utility model to solve the technical problem is:

[0006] An internal circulation multifunctional disinfection cabinet comprises a shell, the shell is provided with an inner cavity, the inner cavity is provided with a ventilation plate and a component mounting plate, the ventilation plate and the inner wall of the shell are enclosed to form a heating cavity, the ventilation plate is provided with a first air outlet, and a second air outlet located below the first air outlet, the component mounting plate is provided with a heating device for heating the air in the heating cavity through the first air outlet to form a hot air flow, and an exhaust duct connected to the heating device and opening toward the second air outlet, the exhaust duct cooperates with the second air outlet so that the hot air flow returns to the heating cavity through the second air outlet.

[0007] Furthermore, the heating device includes a heating fan corresponding to the first air outlet to obtain air, and a heating fin located below the heating fan and connected to the exhaust air duct.

[0008] Furthermore, the heating fan includes fan blades bent and extended toward the heating fins.

[0009] Furthermore, the shell includes a rear cover plate, which together with the component mounting plate forms an auxiliary cavity. The heating fan is provided with an auxiliary air inlet on the side close to the rear cover plate. The heating fan obtains air in the auxiliary cavity through the auxiliary air inlet and guides the air to the heating fins for heating. The bottom of the shell is also provided with an air inlet hole that communicates with the auxiliary cavity.

[0010] Furthermore, the auxiliary air inlet includes a first auxiliary air inlet and a second auxiliary air inlet symmetrically arranged with respect to the first auxiliary air inlet.

[0011] Furthermore, a heat dissipation channel for discharging heat to the outside and isolating from the auxiliary cavity is provided between the ventilation plate, the component mounting plate and the rear cover plate.

[0012] Furthermore, the heat dissipation channel is provided with a cooling fan located on the component mounting plate, a third air outlet located on the air-permeable plate and corresponding to the cooling fan, and a heat dissipation outlet located on the rear cover plate and corresponding to the cooling fan. The cooling fan discharges the heat in the heating chamber to the outside through the heat dissipation outlet via the third air outlet.

[0013] Furthermore, the width of the exhaust duct on a side close to the second air outlet is L1, and the width of the exhaust duct on a side close to the heating device is L2, and L1>L2.

[0014] Further, the exhaust duct includes a first exhaust duct and a second exhaust duct located on one side of the first exhaust duct, and the second air outlet includes a second left air outlet corresponding to the first exhaust duct and a second right air outlet corresponding to the second exhaust duct.

[0015] Furthermore, the sum of the width of the second left air outlet and the width of the second right air outlet is L3, and L1=L3.

[0016] The beneficial effects of the utility model are as follows:

[0017] 1. The internal circulation multifunctional disinfection cabinet of the utility model is provided with a ventilation plate and a component mounting plate on the inner cavity, a heating device and an exhaust duct connected with the heating device are provided on the component mounting plate, a first air outlet and a second air outlet located below the first air outlet are provided on the ventilation plate, the heating device can draw air from the heating cavity through the first air outlet to heat and form a hot air flow, the opening of the exhaust air outlet faces the second air outlet, the hot air flow passes through the exhaust air outlet and flows back to the heating cavity through the second air outlet, thereby forming an internal circulation of the air flow, the disinfection cabinet utilizes the internal circulation of the air flow for heating and disinfection, does not rely on the external ambient air, and effectively solves the problem that the existing disinfection cabinet uses a hot air blower to draw external air into the device for heating, and sends the heated air into the inner cavity, but when the external ambient temperature is low, the hot air blower is difficult to heat the external cold air to a temperature that meets the temperature requirements of high-temperature disinfection, affecting the user experience;

[0018] 2. The disinfection cabinet mainly utilizes the internal circulation of air flow for heating and disinfection. The external ambient temperature basically does not affect the thermal efficiency of the heating device in heating the air. When the external ambient temperature is too low or too high, the heating device can use the same power to heat the air, thereby achieving the temperature requirements for heating and disinfection, effectively reducing energy waste, helping to save resources, and reducing the impact on the environment.

[0019] The utility model will be further described below in conjunction with the accompanying drawings and specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is one of the structural schematic diagrams of the internal circulation multifunctional disinfection cabinet of the utility model;

[0021] Figure 2 This is an exploded schematic diagram of the interior of the internal circulation multifunctional disinfection cabinet of the utility model;

[0022] Figure 3 This is a schematic diagram of the structure inside the internal circulation multifunctional disinfection cabinet of the utility model;

[0023] Figure 4 This is one of the structural schematic diagrams of the heating device and the exhaust duct of the utility model;

[0024] Figure 5 This is the second structural schematic diagram of the heating device and the exhaust duct of the utility model;

[0025] Figure 6 for Figure 5 Schematic cross-sectional view along line AA;

[0026] Figure 7 This is the third structural schematic diagram of the heating device and the exhaust duct of the utility model;

[0027] Figure 8This is the second structural schematic diagram of the internal circulation multifunctional disinfection cabinet of the utility model;

[0028] Fig. 9 This is an exploded schematic diagram of the internal circulation multifunctional disinfection cabinet of the utility model;

[0029] Fig.10 This is the third structural diagram of the internal circulation multifunctional disinfection cabinet of the utility model;

[0030] Fig.11 for Fig.10 Schematic cross-sectional view along line FF. DETAILED DESCRIPTION

[0031] The implementation modes of the present utility model are described in detail below in conjunction with the accompanying drawings.

[0032] like Figures 1 to 11 The internal circulation multifunctional disinfection cabinet shown comprises a shell 1, the shell 1 is provided with an inner cavity 2, the inner cavity 2 is provided with a ventilation plate 3 and a component mounting plate 4, the ventilation plate 3 and the inner side wall of the shell 1 are enclosed to form a heating chamber 5, the ventilation plate 3 is provided with a first air port 31, and a second air port 32 located below the first air port 31, the component mounting plate 4 is provided with a heating device 6 for heating the air in the heating chamber 5 through the first air port 31 to form a hot air flow, and an exhaust duct 7 connected to the heating device 6 and opening toward the second air port 32, the exhaust duct 7 cooperates with the second air port 32 so that the hot air flow flows back to the heating chamber 5 through the second air port 32;

[0033] The utility model discloses an internal circulation type multifunctional disinfection cabinet, by arranging a ventilation plate and a component mounting plate on the inner cavity, a heating device and an exhaust duct connected with the heating device on the component mounting plate, a first air outlet and a second air outlet located below the first air outlet on the ventilation plate, the heating device can draw air from the heating cavity through the first air outlet, heat it and form a hot air flow, the opening of the exhaust air duct faces the second air outlet, the hot air flow passes through the exhaust air duct and flows back to the heating cavity through the second air outlet, thereby forming an internal circulation of the air flow, the disinfection cabinet utilizes the internal circulation of the air flow for heating and disinfection, does not rely on the external ambient air, and effectively solves the problem that the existing disinfection cabinet draws external air into the device for heating by using a hot air blower, and sends the heated air into the inner cavity, but when the external ambient temperature is low, the hot air blower is difficult to heat the external cold air to a temperature that meets the high-temperature disinfection requirement, thereby affecting the user experience.

[0034] Furthermore, the disinfection cabinet mainly utilizes the internal circulation of air flow for heating and disinfection. The external ambient temperature basically does not affect the thermal efficiency of the heating device in heating the air. When the external ambient temperature is too low or too high, the heating device can use the same power to heat the air, thereby achieving the temperature requirements for heating and disinfection, effectively reducing energy waste, helping to save resources, and reducing the impact on the environment.

[0035] Optionally, in some embodiments, the ventilation plate 3 and the inner cavity 2 may be connected in a snap connection, a lock connection, a magnetic connection or the like.

[0036] Preferably, the connection between the ventilation plate 3 and the inner cavity 2 is a threaded connection. The threaded connection can make the connection between the ventilation plate 3 and the inner cavity 2 more stable and not easy to loosen or fall off, effectively ensuring that the disinfection cabinet will not malfunction or have safety hazards due to loose connection parts during operation; secondly, the threaded connection has the characteristic of easy disassembly. When the user needs to clean, repair or replace the ventilation plate 3, he only needs to unscrew the threads to complete the disassembly, which is conducive to reducing the difficulty and time cost of maintenance work.

[0037] Similarly, the connection between the component mounting plate 4 and the inner cavity 2 is also threaded.

[0038] Furthermore, a temperature sensor 30 is provided on the ventilation plate 3 , and the temperature sensor 30 can be used to monitor the temperature change in the heating chamber 5 in real time, so that the system can accurately control the temperature in the heating chamber 5 .

[0039] like Figures 1 to 11 The heating device 6 shown includes a heating fan 61 corresponding to the first air outlet 31 to obtain air, and a heating fin 62 located below the heating fan 61 and communicating with the exhaust air duct 7;

[0040] Specifically, the heating fan 61 rotates to form a negative pressure, so that the air in the heating chamber 5 can be drawn to the heating fins 62 through the first air outlet 31 for heating. The heating fins 62 are located on the side of the exhaust duct 7 close to the heating fan 61 and are connected to the exhaust duct 7. The air outlet of the exhaust duct 7 faces the second air outlet 32. The heated air flows back to the heating chamber 5 through the exhaust duct 7 via the second air outlet 32, thereby forming an internal circulation of the air flow, which is conducive to realizing an efficient heating process and quickly increasing the temperature of the heating chamber 5.

[0041] Furthermore, the first air outlet 31 is circular in shape and is provided with a plurality of ventilation holes. The distribution of the ventilation holes can ensure that the air in the heating chamber 5 can enter the heating fan 61 evenly in different directions, which is beneficial to improving the heating efficiency and air circulation effect.

[0042] Furthermore, the position of the first air outlet 31 and the position of the heating fan 61 are in the same straight line, which is beneficial to reducing the resistance of the air during the flow, effectively improving the air intake efficiency of the heating fan 61, and at the same time, effectively ensuring the stability of the internal circulation of the airflow.

[0043] Furthermore, by arranging the heating fins 62 on the side of the exhaust duct 7 close to the heating fan 61, it is effectively ensured that the air entering the exhaust duct 7 can be evenly heated, avoiding the occurrence of local excessively high or low temperatures, which is beneficial to improving the heating and disinfection effects.

[0044] like Figures 1 to 11 The heating fan 61 shown includes a fan blade 611 bent and extended toward the heating fin 62;

[0045] Furthermore, the fan blades 611 are bent and extended toward the heating fins 62 so that the wind force generated by the heating fan 61 is directly aimed at the heating fins 62, thereby increasing the contact area between the air and the heating fins 62, and effectively improving the heating efficiency and the efficiency of air flow; secondly, the setting of the fan blades 611 makes the wind force generated by the heating fan 61 more targeted and directly acts on the heating fins 62, reducing the loss of energy during the transmission process and the degree of energy waste, thereby achieving energy-saving effects; finally, the fan blades 611 are bent and extended toward the heating fins 62, which can make the air flow smoother and reduce the noise generated by the friction between the air and the mechanical structure during the flow, which helps to reduce the noise level during the operation of the disinfection cabinet and effectively improve the user experience.

[0046] like Figures 1 to 11 The housing 1 shown includes a rear cover plate 11, and the rear cover plate 11 and the component mounting plate 4 are enclosed to form an auxiliary cavity 8. The heating fan 61 is provided with an auxiliary air inlet 612 on the side close to the rear cover plate 11. The heating fan 61 obtains air in the auxiliary cavity 8 through the auxiliary air inlet 612 and guides the air to the heating fins 62 for heating. The bottom of the housing 1 is also provided with an air inlet hole 12 communicating with the auxiliary cavity 8;

[0047] Specifically, when the air in the heating chamber 5 is heated and over-expanded, in order to prevent the temperature inside the device from being too high or the air pressure from being too high, part of the air needs to be discharged to the outside, and the air inlet 12 at the bottom of the shell 1 allows external air to enter the auxiliary chamber 8. The air in the auxiliary chamber 8 enters the heating fan 61 through the auxiliary air inlet 612, so that it can be heated by the heating fins 62, and finally enter the heating chamber 5 through the exhaust duct 7 to replenish the gas.

[0048] Furthermore, the air inlet holes are arranged at intervals at the bottom of the shell 1 .

[0049] like Figures 1 to 11 The auxiliary air inlet 612 shown includes a first auxiliary air inlet 6121 and a second auxiliary air inlet 6122 symmetrically arranged with respect to the first auxiliary air inlet 6121;

[0050] Furthermore, by symmetrically arranging the first auxiliary air inlet 6121 and the second auxiliary air inlet 6122, the air in the auxiliary cavity 8 can enter the heating fan 61 through the two symmetrical air inlets at the same time, thereby forming a more uniform ventilation effect and improving the air circulation and heating effects.

[0051] Furthermore, the first auxiliary air inlet 6121 and the second auxiliary air inlet 6122 are both crescent-shaped. The crescent-shaped shape can optimize the air inlet path, allowing the air to enter the heating fan 61 more smoothly, effectively ensuring that the air enters the heating fan 61 The path is smoother, reducing resistance and interference, and improving the air flow and uniformity; secondly, the crescent-shaped setting not only improves the functionality of the device, but also has a certain aesthetic appeal.

[0052] like Figures 1 to 11 A heat dissipation channel 13 is provided between the ventilation plate 3, the component mounting plate 4 and the rear cover plate 11, which is used to discharge heat to the outside and is isolated from the auxiliary cavity 8;

[0053] Furthermore, by setting up the heat dissipation channel 13, the excess heat generated can be effectively discharged from the heating chamber 5, ensuring that the system can maintain a stable temperature when working at high temperature. By setting up the heat dissipation channel 13, the heat conduction and dissipation efficiency can be improved, avoiding the problem of system overheating caused by excessive heat accumulation.

[0054] Furthermore, by providing the heat dissipation channel 13, the risk of failure of components inside the system due to overheating can be effectively reduced, and the heat dissipation channel 13 is isolated from the auxiliary cavity 8 so that heat can be discharged to the outside in time, avoiding damage to components caused by heat, and ensuring stable operation and long-term reliability of the equipment.

[0055] like Figures 1 to 11 The heat dissipation channel 13 shown is provided with a heat dissipation fan 41 located on the component mounting plate 4, a third air outlet 33 located on the air-permeable plate 3 and corresponding to the heat dissipation fan 41, and a heat dissipation outlet 14 located on the rear cover plate 11 and corresponding to the heat dissipation fan 41. The heat dissipation fan 41 discharges the heat in the heating chamber 5 to the outside through the heat dissipation outlet 14 via the third air outlet 33;

[0056] Specifically, when the heating device 6 heats the heating chamber 5, the cooling fan 41 is in a stationary state until the heating is completed, and the heating device 6 stops heating. At this time, the cooling fan 41 rotates to generate negative pressure, so that the cooling fan 41 can quickly discharge the excessive heat accumulated in the heating chamber 5 through the third air outlet 33 through the heat dissipation port 14 to the outside, effectively and quickly reducing the temperature in the heating chamber 5, and achieving the effect of fast baking and caching.

[0057] Furthermore, the third air outlet 33, the heat dissipation fan 41 and the heat dissipation outlet 14 are all located in the same straight line, which is conducive to the rapid discharge of hot air to the outside, effectively enhancing the heat dissipation effect, and is conducive to reducing the operating temperature of the equipment and maintaining the stability of the equipment; secondly, through the straight line arrangement and distribution, the overall structural layout is simplified, and at the same time, it is conducive to reducing the friction resistance and air flow resistance of the internal components of the system, and improving the efficiency of air circulation.

[0058] Furthermore, the third air outlet 33 and the cooling fan 41 are both located above the inner cavity 2. The arrangement of the third air outlet 33 and the cooling fan 41 above the inner cavity 2 matches the characteristic of the hot air flowing upward. The hot air flow usually rises, so that the cooling fan 41 can discharge the hot air flow to the external environment more quickly, which is beneficial to improving the heat dissipation efficiency and maintaining the stability of the device.

[0059] like Figures 1 to 11 The width of the exhaust duct 7 near the second air outlet 32 ​​is L1, and the width of the exhaust duct 7 near the heating device 6 is L2, L1>L2;

[0060] Furthermore, the setting of L1>L2 means that the exhaust duct 7 is narrow at the top and wide at the bottom. During the exhaust process, the resistance to air flow will gradually decrease as the cross-sectional area of ​​the duct gradually expands, thereby reducing the energy consumption of the internal system of the disinfection cabinet.

[0061] Furthermore, the setting of the exhaust duct 7 which is narrow at the top and wide at the bottom can maintain the stability of the exhaust. As the cross-sectional area of ​​the duct gradually expands, the exhaust speed is relatively stable and sudden airflow changes are not easy to occur, which is conducive to maintaining the stability of the air flow inside the disinfection cabinet.

[0062] like Figures 1 to 11 The exhaust duct 7 shown includes a first exhaust duct 71, a second exhaust duct 72 located on one side of the first exhaust duct 71, and the second air outlet 32 ​​includes a second left air outlet 321 corresponding to the first exhaust duct 71, and a second right air outlet 322 corresponding to the second exhaust duct 72;

[0063] Furthermore, by providing a first exhaust duct 71 and a second left air outlet 321 corresponding to the first exhaust duct 71, a second exhaust duct 72 and a second right air outlet 322 corresponding to the second exhaust duct 72, it is beneficial to improve the uniformity of air flow, avoid dead corners and local poor ventilation, and improve the efficiency and quality of air circulation; secondly, when one of the exhaust ducts and the air outlet fails and cannot be used, the other exhaust duct and the air outlet can still operate normally, minimizing the downtime or reduced exhaust efficiency due to a single channel failure, which is beneficial to improving the reliability and stability of the system.

[0064] like Figures 1 to 11 The sum of the width of the second left air outlet 321 and the width of the second right air outlet 322 is L3, L1 = L3;

[0065] Furthermore, the width of L1 is the sum of the width of the outlet of the first exhaust duct 71 and the width of the outlet of the second exhaust duct 72. The setting of L1=L3 maximizes the exhaust coverage range and ensures that the heated air can enter the heating chamber 5 as much as possible, which is beneficial to improving the heating efficiency of the disinfection cabinet.

[0066] Furthermore, the second left air outlet 321 and the second right air outlet 322 are both rectangular in shape and are provided with a plurality of ventilation holes. The distribution of the ventilation holes can ensure that the heated air can enter the heating chamber 5 evenly in different directions, which is beneficial to improving the heating efficiency and air circulation effect.

[0067] Furthermore, the second left air outlet 321 and the first exhaust duct 71 are located in the same straight line, and the second right air outlet 322 and the second exhaust duct 72 are located in the same straight line, which is beneficial to reducing the resistance of air during flow, effectively improving the efficiency of hot air entering the heating chamber 5, and at the same time, effectively ensuring the stability of the internal circulation of the airflow.

[0068] The implementation method of this embodiment is as follows:

[0069] The internal circulation multifunctional disinfection cabinet comprises a shell 1, wherein an inner cavity 2 is arranged in the shell 1, and an air vent plate 3 and a component mounting plate 4 are arranged on the inner cavity 2. The air vent plate 3 and the inner side wall of the shell 1 enclose a heating cavity 5, and a first air outlet 31 and a second air outlet 32 ​​located below the first air outlet 31 are arranged on the air vent plate 3. The component mounting plate 4 is provided with a heating device 6 and an exhaust duct 7 connected with the heating device 6. The heating device 6 can draw air from the heating cavity 5 through the first air outlet 31 to heat and form a hot air flow. The opening of the exhaust duct 7 faces the second air outlet 32, and the hot air flow flows back to the heating cavity 5 through the exhaust duct 7 and the second air outlet 32, thereby forming an internal circulation of the air flow. The disinfection cabinet utilizes the internal circulation of the air flow for heating and disinfection, and does not rely on the external ambient air. This effectively solves the problem that the existing disinfection cabinet uses a hot air blower to draw external air into the device for heating, and sends the heated air into the inner cavity, but when the external ambient temperature is low, the hot air blower is difficult to heat the external cold air to a temperature that meets the temperature requirements for high-temperature disinfection, thereby affecting the user experience. In addition, the housing 1 includes a rear cover plate 11, a third air outlet 33 is provided on the ventilation plate 3, a cooling fan 41 is provided on the component mounting plate 4, and a heat dissipation port 14 is provided on the rear cover plate 11. The heat dissipation fan 41 rotates to form a negative pressure, and the excessive heat accumulated in the heating chamber 5 is discharged to the outside through the third air outlet 33 through the heat dissipation port 14, so that the heat is discharged to the outside in time, avoiding damage to the components caused by heat, and ensuring the stable operation and long-term reliability of the equipment. Finally, an air inlet 12 is provided at the bottom of the housing 1, and the rear cover plate 11 and the component mounting plate 4 are enclosed to form an auxiliary chamber 8. External air enters the auxiliary chamber 8 through the air inlet 12. The heating device 6 includes a heating fan 61. The side of the heating fan 61 close to the rear cover plate 11 is provided with an auxiliary air inlet 612. The air in the auxiliary chamber 8 enters the heating fan 61 through the auxiliary air inlet 612 to be heated and form a hot air flow through the exhaust air duct 7 to enter the heating chamber 5, thereby replenishing the air inside the device, which is conducive to improving the stability of the device operation.

[0070] The above examples are only used to further illustrate the technical content of the utility model, so that readers can understand it more easily, but it does not mean that the implementation methods of the utility model are limited to this. Any technical extension or re-creation made based on the utility model is protected by the utility model. The protection scope of the utility model shall be based on the claims.

Claims

1. An internal circulation multifunctional disinfection cabinet, comprising a housing (1), characterized in that: The shell (1) is provided with an inner cavity (2), the inner cavity (2) is provided with a ventilation plate (3) and a component mounting plate (4), the ventilation plate (3) and the inner side wall of the shell (1) are enclosed to form a heating cavity (5), the ventilation plate (3) is provided with a first air port (31), and a second air port (32) located below the first air port (31), the component mounting plate (4) is provided with a heating device (6) for heating the air in the heating cavity (5) through the first air port (31) to form a hot air flow, and an exhaust duct (7) connected to the heating device (6) and opening toward the second air port (32), the exhaust duct (7) cooperates with the second air port (32) so that the hot air flow flows back to the heating cavity (5) through the second air port (32).

2. The internal circulation multifunctional disinfection cabinet according to claim 1, characterized in that: The heating device (6) comprises a heating fan (61) corresponding to the first air outlet (31) to obtain air, and a heating fin (62) located below the heating fan (61) and connected to the exhaust air duct (7).

3. The internal circulation multifunctional disinfection cabinet according to claim 2 is characterized in that: The heating fan (61) comprises a fan blade (611) which is bent and extended in the direction of the heating fin (62).

4. The internal circulation multifunctional disinfection cabinet according to claim 2 is characterized in that: The shell (1) comprises a rear cover plate (11), wherein the rear cover plate (11) and the component mounting plate (4) are combined to form an auxiliary cavity (8), and the heating fan (61) is provided with an auxiliary air inlet (612) on the side close to the rear cover plate (11), and the heating fan (61) obtains air in the auxiliary cavity (8) through the auxiliary air inlet (612) and guides the air to the heating fins (62) for heating, and the bottom of the shell (1) is also provided with an air inlet hole (12) which is in communication with the auxiliary cavity (8).

5. The internal circulation multifunctional disinfection cabinet according to claim 4 is characterized in that: The auxiliary air inlet (612) comprises a first auxiliary air inlet (6121) and a second auxiliary air inlet (6122) arranged symmetrically to the first auxiliary air inlet (6121).

6. The internal circulation multifunctional disinfection cabinet according to claim 4, characterized in that: A heat dissipation channel (13) for discharging heat to the outside and is isolated from the auxiliary cavity (8) is provided between the ventilation plate (3), the component mounting plate (4) and the rear cover plate (11).

7. The internal circulation multifunctional disinfection cabinet according to claim 6, characterized in that: The heat dissipation channel (13) is provided with a heat dissipation fan (41) located on the component mounting plate (4), a third air outlet (33) located on the air-permeable plate (3) and corresponding to the heat dissipation fan (41), and a heat dissipation port (14) located on the rear cover plate (11) and corresponding to the heat dissipation fan (41); the heat dissipation fan (41) discharges heat in the heating chamber (5) to the outside through the heat dissipation port (14) via the third air outlet (33).

8. The internal circulation multifunctional disinfection cabinet according to claim 1, characterized in that: The width of the exhaust air duct (7) on the side close to the second air outlet (32) is L1, and the width of the exhaust air duct (7) on the side close to the heating device (6) is L2, and L1>L2.

9. The internal circulation multifunctional disinfection cabinet according to claim 8, characterized in that: The exhaust air duct (7) comprises a first exhaust air duct (71), and a second exhaust air duct (72) located on one side of the first exhaust air duct (71); the second air outlet (32) comprises a second left air outlet (321) corresponding to the first exhaust air duct (71), and a second right air outlet (322) corresponding to the second exhaust air duct (72).

10. The internal circulation multifunctional disinfection cabinet according to claim 9, characterized in that: The sum of the width of the second left air outlet (321) and the width of the second right air outlet (322) is L3, and L1=L3.

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