Integrated stove with cooking device and method for drying inner pot thereof

Abstract

The present invention relates to an integrated stove with a cooking device, including a cooking device with an inner pot and a steaming function, a heating assembly is arranged in the inner pot, which includes an upper heating tube, a middle heating tube and a lower heating tube, a hot air baffle is arranged on the back of the inner pot, the hot air baffle and the back plate of the inner pot form a hot air chamber, a stirring fan is arranged in the hot air chamber, the middle heating tube is arranged around the outer periphery of the stirring fan, and an exhaust port communicating with the hot air chamber is arranged on the back plate of the inner pot; and also relates to a method for drying the inner pot of the integrated stove. In the present invention, the inner pot is heated in all directions by the heating assembly, so that the condensation of steam in the inner pot can be avoided, and the steam on the inner surface of the inner pot can be heated and volatilized at the same time, and the heated hot air flow of the inner pot is sucked into the hot air chamber through the action of the stirring fan and discharged from the exhaust port. The drying method of the present invention can realize the heating of the air flow in the inner pot and the heating and volatilization of the condensed water on the inner surface of the inner pot, thereby realizing the efficient drying of the inner pot of the integrated stove.

Description

Technical Field

[0001] The invention relates to the field of cooking devices, and in particular to an integrated stove with a cooking device and a method for drying an inner pot thereof. Background Art

[0002] The working principle of cooking devices with steaming function, such as steam ovens, steam-bake combination machines and microwave steam-bake combination machines, is mainly to heat and steam food by filling the inner pot with steam. Some steam cooking devices use external steam generators to supply steam, while others use built-in steam generators to supply steam.

[0003] After cooking, some steam will remain in the inner pot. In this way, not only will the steam in the inner pot rush directly to the user when the door is opened, thus causing a bad user experience, but also after the steam condenses, the condensed water will accumulate in the inner pot. If it is not used for a long time, it will not only cause the relevant parts to be corroded, affecting the service life, but also breed a large number of bacteria, thus causing safety hazards. At present, there is a way to solve the above problem by extracting steam from the inner pot. For example, the Chinese invention patent with application number CN201810025623.2 (publication number CN110025227A) discloses an oven with automatic dehumidification and drying function, which includes a cooking chamber, characterized in that it also includes: a dehumidification device, arranged on the outer wall of the cooking chamber, the dehumidification device includes a rotating member and a driving structure for driving the rotating member to rotate; a through hole, which is opened on the outer wall of the cooking chamber to accommodate the rotating member; and the rotating member exposes its partial surface to the inside or outside of the cooking chamber in rotation during the rotation of the through hole; a water storage box, which is arranged below the rotating member. This patent realizes drying of the condensed water in the cooking chamber by pumping the condensed water out of the cooking chamber. However, this method requires condensing the steam first and then pumping it out of the cooking chamber, and the drying efficiency is poor. Summary of the invention

[0004] The first technical problem to be solved by the present invention is to provide an integrated stove with a cooking device having high drying efficiency in view of the prior art.

[0005] The second technical problem to be solved by the present invention is to provide an integrated stove with a cooking device having good heat dissipation effect in view of the prior art.

[0006] The third technical problem to be solved by the present invention is to provide an integrated stove with a cooking device that is safe to use in view of the prior art.

[0007] The fourth technical problem to be solved by the present invention is to provide a method for drying the inner pot of an integrated stove with high drying efficiency in view of the prior art.

[0008] The technical solution adopted to solve the above-mentioned first technical solution is: an integrated stove with a cooking device, comprising a cooking device with an inner pot and a steaming function, characterized in that a heating component is arranged in the inner pot, and the heating component comprises an upper heating tube, a middle heating tube and a lower heating tube, wherein the upper heating tube is installed on the lower surface of the top wall of the inner pot, and the lower heating tube is installed on the bottom of the inner pot, and a hot air baffle with an air inlet and an air outlet is arranged on the back of the inner pot, and the hot air baffle and the back plate of the inner pot form a hot air chamber, and a stirring fan is arranged in the hot air chamber, the middle heating tube has an annular shape and is arranged around the outer periphery of the above-mentioned stirring fan, and an exhaust port communicating with the above-mentioned hot air chamber is arranged on the back plate of the inner pot.

[0009] Preferably, a heating plate is embedded in the bottom wall of the inner pot, and the inner pot also includes a water tank and a water inlet pump, a water outlet on the water tank, and the water outlet is connected to the water inlet port of the water inlet pump through a water outlet pipe, and a water inlet is opened on the inner pot, and the water inlet is connected to the water outlet port of the water inlet pump through a water inlet pipe, and the water inlet pipe is provided with a solenoid valve for opening and closing the water inlet pipe.

[0010] The technical solution adopted to solve the second technical problem is as follows: the integrated stove in the present invention also includes a stove with a burner, the stove is arranged above the cooking device, and the stove includes a stove shell, characterized in that a ventilation hole is provided on one side wall of the stove shell, an air outlet is provided on the other side wall, and an air inlet is provided on the side wall of the inner pot, and the air inlet is fluidly connected with the air outlet. The burner of the stove generates heat when burning, thereby causing the air temperature in the inner cavity of the stove shell to rise. In the present invention, the high-temperature air in the stove shell is introduced into the inner pot, and the hot air can heat and volatilize the condensed water on the inner surface of the inner pot, and the heated hot air is discharged through the exhaust port, so that not only the inner pot is dried quickly, but also the high-temperature gas in the stove shell is discharged to the inner pot, so that the heat inside the stove shell can be effectively dissipated, and the normal function of the power board and other components can be avoided due to the excessive temperature inside the stove shell.

[0011] In order to allow the hot air in the inner cavity of the stove shell to enter the inner pot more efficiently, thereby improving the drying efficiency of the inner pot, the integrated stove in the present invention also includes an air supply device for guiding the airflow from the air outlet of the stove shell to the air inlet of the inner pot, and the air inlet port of the air supply device is fluidically connected to the air outlet of the above-mentioned stove shell.

[0012] Preferably, the air outlet of the range shell is connected to the air inlet of the inner pot through an air supply pipe, and the air supply device is arranged on the air supply pipe.

[0013] Preferably, the air supply pipe is also provided with a control valve for controlling the opening and closing of the air supply pipe, so that the input of air from the inner cavity of the stove shell to the inner pot can be better controlled through the control valve, thereby achieving drying of the inner pot.

[0014] Furthermore, preferably, an air delivery channel is provided in the inner cavity of the stove shell, the lower end of the burner is embedded in the air delivery channel, and one end of the air delivery channel is in fluid communication with the vent, and the other end is in fluid communication with the air outlet. By providing the air delivery channel, the heat of the air transferred from the burner to the inner cavity of the stove shell can be taken away from the air outlet to the greatest extent, and the influence of the heat generated by the burner on the internal components of the stove can be avoided to the greatest extent, thereby greatly improving the internal heat dissipation of the stove, thereby improving the performance of the stove and extending its service life.

[0015] The technical solution adopted to solve the third technical problem is: the integrated stove in the present invention also includes a power board, which is respectively connected to the heating plate, the stirring fan, the water inlet pump, the solenoid valve, the air delivery device and the control valve, and each heating tube is connected to the power board in parallel, and the first thermal circuit breaker is connected to the main connection line of each heating tube and the power board, and the second thermal circuit breaker is connected to the connection branch of the bottom heating plate. Preferably, the upper limit temperature of the first thermal circuit breaker is 180°C.

[0016] The technical solution adopted to solve the fourth technical problem is: a method for drying the inner pot of the integrated stove as described above, characterized in that it comprises the following steps:

[0017] S1: Before the steaming process is completed, the water inlet pump and the solenoid valve are turned off, the water inlet to the inner pot stops, the heating plate continues to work, and the upper heating tube, the middle heating tube and the lower heating tube are turned on;

[0018] S2: Turn on the stirring fan to fill the entire inner pot with hot air;

[0019] S3: Open the air delivery device and the control valve respectively, and the hot air in the cooker shell enters the inner pot through the air outlet and the air inlet, and the air flow in the inner pot enters the hot air chamber and is discharged through the exhaust port;

[0020] S4: the bottom heating plate is dry-burned once, the second thermal circuit breaker is disconnected, and the heating plate stops working;

[0021] S5: the temperature of the inner tank exceeds 180°C, the first thermal circuit breaker is disconnected, and all the inner tanks stop working at the same time;

[0022] S6: The above-mentioned air supply device and control valve are closed, and the stirring fan continues to work for a period of time and then stops working, and the drying process is completed.

[0023] Preferably, in step S1, 3 minutes before the steaming process is completed, the water inlet pump and the solenoid valve are turned off, and the upper heating tube, the middle heating tube and the lower heating tube are turned on.

[0024] Preferably, in step S6, the stirring fan continues to work for 0.5 minutes and then stops working, and the drying process is completed, so as to avoid the internal temperature of the inner pot being too high and the steamed food is placed for secondary heating.

[0025] Compared with the prior art, the advantages of the present invention are: the present invention heats the inner pot in all directions through the upper heating tube, the middle heating tube and the lower heating tube, thereby avoiding the condensation of steam in the inner pot, and at the same time, the steam on the inner surface of the inner pot can be heated and volatilized, and the heated hot air flow of the inner pot is sucked into the hot air chamber through the action of the stirring fan and discharged from the exhaust port. In the drying method of the present invention, the heating of the air flow in the inner pot and the heating and volatilization of the condensed water on the inner surface of the inner pot are achieved through the coordinated action of the heating tubes, the heating plate, the stirring fan and the hot air in the stove shell, thereby achieving efficient drying of the inner pot of the cooking device. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 This is a schematic diagram of the structure of an integrated stove in an embodiment of the present invention;

[0027] Figure 2 for Figure 1 A schematic diagram of the structure in another direction;

[0028] Figure 3 for Figure 2 Cross-sectional view along AA direction;

[0029] Figure 4 It is a schematic diagram of the partial structure of the integrated stove in an embodiment of the present invention;

[0030] Figure 5 for Figure 4 A schematic diagram of the structure in another direction;

[0031] Figure 6 Another partial structural schematic diagram of an integrated stove in an embodiment of the present invention;

[0032] Figure 7 is another partial structural schematic diagram of the integrated stove in an embodiment of the present invention;

[0033] Figure 8 1 is an electrical connection diagram of an embodiment of the present invention. DETAILED DESCRIPTION

[0034] The present invention is further described in detail below with reference to the accompanying drawings.

[0035] like Figures 1 to 8As shown, an integrated stove with a cooking device includes a cooking device 102 with a steaming function and a stove 101 arranged above the cooking device 102, the cooking device 102 includes an inner pot 1, and the stove 101 includes a stove shell 100, the stove shell 100 includes a bottom plate 1002 with an upper opening and a panel 1001 covering the opening of the bottom plate 1002, and the inner cavity of the stove shell 100 is formed between the two.

[0036] The inner pot 1 is provided with a heating assembly, which includes an upper heating tube 91, a middle heating tube 32 and a lower heating tube 92, wherein the upper heating tube 91 is installed on the lower surface of the top wall of the inner pot 1, and the lower heating tube 92 is installed on the bottom of the inner pot 1. The inner pot 1 is provided with a hot air baffle 31 with an air inlet 311 and an air outlet 312, and a hot air chamber 30 is formed between the hot air baffle 31 and the back plate of the inner pot 1, and a stirring fan 3 is provided in the hot air chamber 30, and a ring-shaped middle heating tube 32 is provided on the outer periphery of the stirring fan 3, and an exhaust port 11 communicating with the hot air chamber 30 is provided on the back plate of the inner pot 1. The inner tank 1 is heated in all directions by the upper heating tube 91, the middle heating tube 32 and the lower heating tube 92, so as to avoid condensation of steam in the inner tank 1 and to heat and volatilize the steam on the inner surface of the inner tank 1. The airflow inside the inner tank 1 is heated by the stirring fan 3, so as to further avoid condensation of steam and promote volatilization of condensed water on the inner surface of the inner tank 1. The stirring fan 3 rotates to form a negative pressure in the hot air chamber 30, so as to better guide the hot air from the inner tank 1 into the hot air chamber 30 and discharge it through the exhaust port 11.

[0037] In this embodiment, a vent 1002a is provided on the left side wall of the chassis 1002, and an air outlet 1002b is provided on the right side wall, and the vent 1002a is arranged opposite to the air outlet 1002b. An air inlet 12 and an air outlet 11 are respectively provided on the side walls of the inner liner 1. In this embodiment, the air inlet 12 is provided at the lower part of the right side wall of the inner liner 1, and the air outlet 11 is provided on the back plate of the inner liner 1. The air inlet 12 is fluidly connected with the air outlet 1002b: when the air inlet 12 and the air outlet 1002b are arranged adjacent to each other, the two can be connected to each other (not shown); when the air inlet 12 and the air outlet 1002b are far apart, the two can be connected through a pipeline. In this embodiment, the air inlet 12 and the air outlet 1002b are connected through the air supply pipe 80 described below. The burner 1004 of the stove 101 generates heat when burning, which causes the air temperature in the inner cavity of the stove shell 100 to rise. In the present invention, the high-temperature air in the stove shell 100 is introduced into the inner pot 1. The hot air can heat and volatilize the condensed water on the inner surface of the inner pot 1, and the heated hot air is discharged through the exhaust port 11. This not only achieves rapid drying of the inner pot 1, but also because the high-temperature gas in the stove shell 100 is discharged to the inner pot 1, it can effectively achieve heat dissipation inside the stove shell 100, thereby preventing the internal temperature of the stove shell 100 from being too high and affecting the normal functions of components such as the power board. Since the integrated stove is generally embedded in a cabinet, part of the heat emitted outward by the integrated stove when it is working is accumulated between the integrated stove and the cabinet. Therefore, even if the burner 1004 in the stove 101 is not working, the air input through the air inlet 12 also has a certain temperature. Therefore, after the warm air with a certain temperature enters the inner cavity of the stove shell 100 through the air inlet 12, it is input into the inner pot 1 through the air delivery pipe 80, which can also have a certain heating and drying effect on the inner pot 1. It can be seen that in the present invention, the inner pot 1 can be dried when the burner 1004 is working or not working.

[0038] In order to allow the hot air in the inner cavity of the stove shell 100 to enter the inner pot 1 more efficiently, thereby improving the drying efficiency of the inner pot 1, the integrated stove in the present invention also includes an air delivery device 8 for guiding the airflow from the air outlet 1002b of the stove shell 100 to the air inlet 12 of the inner pot 1, and the air inlet port of the air delivery device 8 is fluidly connected with the air outlet 1002b of the stove shell 100. The air outlet 1002b of the stove shell 100 is connected with the air inlet 12 of the inner pot 1 through the air delivery pipe 80, and the air delivery device 8 is arranged on the air delivery pipe 80. That is, in this embodiment, the air inlet port of the air delivery device 8 is connected with the air outlet 1002b of the stove shell 100 through the air delivery pipe 80. The air delivery device 8 can be implemented in a variety of ways. Preferably, in this embodiment, the air delivery device 8 is an air pump. In addition, the air supply pipe 80 is also provided with a control valve 81 for controlling the opening and closing of the air supply pipe 80 , so that the control valve 81 can better control the input of air from the inner cavity of the stove shell 100 into the inner pot 1 , thereby achieving drying of the inner pot 1 .

[0039] In the present embodiment, since the air inlet 12 is provided on the left side wall of the stove shell 100, and the air outlet 1002b is provided on the right side wall of the stove shell 100, the burner 1004 of the stove 101 is located between the vent 1002a and the air outlet 1002b. In this way, the heat transferred from the burner 1004 to the air in the inner cavity of the stove shell 100 can be better brought out through the air outlet 1002b, which can not only increase the heat of the air input into the air duct 80, but also further solve the influence of the combustion of the burner 1004 on the internal components of the stove 101. Further, preferably, an air delivery channel 83 is provided in the inner cavity of the stove shell 100, and the lower end of the burner 1004 is embedded in the air delivery channel 83, and one end of the air delivery channel 83 is in fluid communication with the vent 1002a, and the other end is in fluid communication with the air outlet 1002b. In this embodiment, the two ends of the air delivery channel 83 are directly connected to the vent 1002a and the air outlet 1002b respectively. By providing the air delivery channel 83, the heat of the air in the inner cavity of the stove shell 100 transferred by the burner 1004 can be taken away from the air outlet 1002b to the greatest extent, and the heat generated by the burner 1004 can be avoided to the greatest extent. The influence of the internal components of the stove 101 on the heat generated by the burner 1004 is avoided, thereby greatly improving the internal heat dissipation of the stove 101, thereby improving the performance of the stove 101 and extending its service life. In addition, due to the negative pressure attraction of the hot air chamber 30, the hot air in the air duct 80 can be driven into the inner pot 1, thereby improving the efficiency of the hot air in the stove shell 100 entering the inner pot 1 and improving the drying efficiency of the inner pot 1.

[0040] In addition, the steam used for heating in the cooking device 102 can be generated in a variety of ways, and currently an external steam generator is generally used. In this embodiment, a heating plate 4 is provided at the bottom of the inner pot 1, and a water inlet (not shown) is provided on the inner pot 1. The water inlet is connected to a water inlet pipe 64 connected to a water inlet pump 61, and a solenoid valve 62 for opening and closing the water inlet pipe 64 is provided on the water inlet pipe 64. The water inlet pipe 64 is connected to the water outlet of the water tank 63, and the water in the water tank 63 enters the water inlet pipe 64, and the water in the water inlet pipe 64 enters the inner pot 11 through the water inlet. The heating plate 4 heats the water in the inner pot 1 to generate steam, and the generated steam is used to heat the food. At the same time, after the steaming process is completed, the condensed water remaining on the inner bottom surface of the inner pot 1 can be effectively evaporated by heating the bottom of the inner pot 1 through the heating plate 4.

[0041] Furthermore, the integrated stove in the present invention further comprises a power board 5, which is respectively connected to the heating plate 4, the stirring fan 3, the water inlet pump 61, the solenoid valve 62, the air delivery device 8 and the control valve 81, and each heating tube is connected in parallel to the power board 5, and the first thermal circuit breaker 71 is connected to the main connection line between each heating tube and the power board 5, and the second thermal circuit breaker 72 is connected to the connection branch line of the heating plate 4. The entire integrated stove structure is protected by the first thermal circuit breaker 71 and the second thermal circuit breaker 72, wherein the upper limit temperature of the first thermal circuit breaker 71 is 180°C.

[0042] The method for drying the inner tank of the integrated stove in the present invention comprises the following steps:

[0043] S1: 3 minutes before the steaming process is completed, the water inlet pump 61 and the electromagnetic valve 62 are turned off, the water inlet to the inner pot 1 stops, the heating plate 4 continues to work, and the upper heating tube 91, the middle heating tube 32 and the lower heating tube 92 are turned on. In this way, the cooperation of the heating plate 4 and the heating tubes can not only prevent the condensation of steam in the inner pot 1, but also heat and volatilize the condensed water on the inner surface of the inner pot 1.

[0044] S2: Turn on the stirring fan 3 to allow the hot air to fill the entire inner pot 1.

[0045] S3: The air delivery device 8 and the control valve 81 are opened respectively, and the hot air in the range shell 100 enters the inner pot 1 through the air outlet 1002b and the air inlet 12, and the air flow in the inner pot 1 enters the hot air chamber 30 and is discharged through the exhaust port 11. Thus, the high-temperature air in the range shell 100 is introduced into the inner pot 1, and the hot air can heat and volatilize the condensed water on the inner surface of the inner pot 1.

[0046] S4: After the heating plate 4 is dry-burned once, the second thermal breaker 72 is disconnected, and the heating plate 4 stops working, thereby protecting the heating plate 4.

[0047] S5: When the temperature of the inner pot 1 exceeds 180°C, the first thermal breaker 71 is disconnected and the heating tubes stop working at the same time. This can not only protect the heating tubes, but also prevent the inner temperature of the inner pot 1 from being too high during the drying process and causing secondary heating of the steamed food.

[0048] S6: The air delivery device 8 and the control valve 81 are closed, and the stirring fan 3 continues to work for 0.5 minutes and then stops working, and the drying process is completed. The stirring fan 3 continues to work for 0.5 minutes to prevent the temperature of the inner container 1 from being too high.

Claims

1. An integrated stove with a cooking device, comprising a cooking device (102) with an inner pot (1) and a steaming function, characterized in that: The inner container (1) is provided with a heating assembly, the heating assembly comprising an upper heating tube (91), a middle heating tube (32) and a lower heating tube (92), wherein the upper heating tube (91) is mounted on the lower surface of the top wall of the inner container (1), the lower heating tube (92) is mounted on the bottom of the inner container (1), and a hot air baffle (31) having an air inlet (311) and an air outlet (312) is disposed on the back of the inner container (1), the hot air baffle (31) and the back plate of the inner container (1) form a hot air chamber (30), a stirring fan (3) is disposed in the hot air chamber (30), the middle heating tube (32) is annular in shape and is disposed around the outer periphery of the stirring fan (3), and an exhaust port (11) communicating with the hot air chamber (30) is disposed on the back plate of the inner container (1); The invention also comprises a stove (101) having a burner (1004), the stove (101) being arranged above the cooking device (102), and the stove (101) comprising a stove shell (100), a ventilation opening (1002a) being provided on one side wall of the stove shell (100), and an air outlet (1002b) being provided on the other side wall, and an air inlet (12) being provided on the side wall of the inner pot (1), and the air inlet (12) being in fluid communication with the air outlet (1002b); It also includes an air delivery device (8) for directing airflow from the air outlet (1002b) of the stove shell (100) to the air inlet (12) of the inner pot (1), and the air inlet port of the air delivery device (8) is in fluid communication with the air outlet (1002b) of the stove shell (100), and the air delivery device (8) is an air pump.

2. The integrated stove according to claim 1, characterized in that: The bottom wall of the inner pot (1) is embedded with a heating plate (4), and also includes a water tank (63) and a water inlet pump (61). The water outlet on the water tank (63) is connected to the water inlet port of the water inlet pump (61) through a water outlet pipe, and the inner pot (1) is provided with a water inlet, which is connected to the water outlet port of the water inlet pump (61) through a water inlet pipe (64), and the water inlet pipe (64) is provided with a solenoid valve (62) for opening and closing the water inlet pipe (64).

3. The integrated stove according to claim 2, characterized in that: The air outlet (1002b) of the stove shell (100) is connected to the air inlet (12) of the inner pot (1) via an air supply pipe (80); the air supply device (8) is arranged on the air supply pipe (80), and the air supply pipe (80) is also provided with a control valve (81) for controlling the opening and closing of the air supply pipe (80).

4. The integrated stove according to claim 3, characterized in that: An air supply channel (83) is provided in the inner cavity of the stove shell (100), and the lower end of the burner (1004) is embedded in the air supply channel (83), and one end of the air supply channel (83) is fluidically connected to the ventilation port (1002a), and the other end is fluidically connected to the air outlet (1002b).

5. The integrated stove according to claim 3, characterized in that: The invention also comprises a power supply board (5), which is respectively connected to the heating plate (4), the stirring fan (3), the water inlet pump (61), the solenoid valve (62), the air supply device (8) and the control valve (81); the heating tubes are sequentially connected in parallel and then connected to the power supply board (5); the main connection line between the heating tubes and the power supply board (5) is connected to a first thermal circuit breaker (71), and the connection branch line of the heating plate (4) is connected to a second thermal circuit breaker (72).

6. The integrated stove according to claim 5, characterized in that: The upper limit temperature of the first thermal circuit breaker (71) is 180°C.

7. A method for drying the inner pot of an integrated stove as claimed in claim 6, characterized in that The following steps are involved: S1: Before the steaming process is completed, the water inlet pump (61) and the solenoid valve (62) are turned off, the water inlet to the inner pot (1) stops, the heating plate (4) continues to work, and the upper heating tube (91), the middle heating tube (32) and the lower heating tube (92) are turned on; S2: turning on the stirring fan (3) to allow the hot air to fill the entire inner pot (1); S3: The air supply device (8) and the control valve (81) are opened respectively, and the hot air in the stove shell (100) is discharged through the air outlet. (1002b) and the air inlet (12) enter the inner container (1), and the air flow in the inner container (1) enters the hot air chamber (30) and is discharged to the outside through the exhaust port (11); S4: the heating plate (4) is dry-burned once, the second thermal circuit breaker (72) is disconnected, and the heating plate (4) stops working; S5: the temperature of the inner tank (1) exceeds 180° C., the first thermal circuit breaker (71) is disconnected, and all the inner tanks (1) stop working at the same time; S6: The air delivery device (8) and the control valve (81) are closed, and the stirring fan (3) continues to work for a period of time and then stops working, and the drying process is completed.

8. The inner tank drying method according to claim 7, characterized in that: In the step S1, 3 minutes before the steaming process is completed, the water inlet pump (61) and the electromagnetic valve (62) are closed, and the upper heating tube (91), the middle heating tube (32) and the lower heating tube (92) are opened.

9. The inner tank drying method according to claim 7, characterized in that: In step S6, the stirring fan (3) continues to work for 0.5 minutes and then stops working, and the drying process is completed.

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