Clothes care machine and control method

Abstract

The invention provides a clothes care machine and a control method, the clothes care machine comprises a water supply assembly, the water supply assembly is connected with a boiler and a heating device which are arranged in parallel, and the outlet ends of the boiler and the heating device are connected with an injection device and used for injecting steam for clothes care. According to the clothes care machine, the steam generation time is shortened by arranging the heating device connected with the boiler in parallel, the needed waiting time is short, and the user experience is good; other structures of an existing clothes care device do not need to be improved, and miniaturization of the clothes care machine is facilitated; the structure is reasonable and operation is safe and reliable.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a clothing care machine and a control method thereof. Background Art

[0002] With the improvement of living standards, people have put forward higher requirements for clothing treatment. Only washing machines, irons, etc. can no longer meet the needs. Clothing care machines that use steam to care for clothes have emerged. They use blowing, steam, heating and care agents to iron and remove wrinkles, remove odors, dry and sterilize clothes, and are widely used.

[0003] The existing technology usually heats the water in the boiler and transmits the generated high-temperature, high-humidity steam to the ironing board through the steam duct for ironing care. Due to the maximum power limit, it takes about 3-4 minutes from heating to generating the steam required for care. The long waiting time leads to poor user experience. How to significantly reduce the waiting time has become an urgent problem to be solved in the development of clothing care machines.

[0004] In view of this, the present invention is proposed. Summary of the invention

[0005] The problem solved by the present invention is that the existing clothing care device needs a long time to be used, resulting in poor user experience.

[0006] To solve the above problems, the present invention provides a clothing care machine, including a water supply component, which is respectively connected to a boiler and a heating device arranged in parallel, and the outlet ends of the boiler and the heating device are connected to an injection device for quickly generating and injecting steam.

[0007] Water is pumped from the water tank into the boiler and heating device simultaneously or separately, and the boiler and heating device start heating to generate steam; while generating steam, the heating device outputs steam to the injection device to perform pre-care for the target clothing; after the boiler is heated to the set pressure or temperature, a large amount of high-temperature steam is output through the boiler for secondary care, thereby greatly shortening the waiting time during use and providing a good user experience.

[0008] Preferably, the clothing care machine further comprises a housing, a care cavity for holding the clothing to be cared for is arranged in the housing, the water supply assembly is located at the bottom of the care cavity and comprises a connected water tank and a water pump, for supplying water to the boiler and the heating device; the spray device has a spray hole and is located above the care cavity, for uniformly spraying steam outward. The arrangement is simple in structure and easy to process.

[0009] Preferably, a steam pipe connected to the injection device is provided on the top of the boiler, and the heating device is provided inside the boiler. This arrangement does not require improvement of other structures of the clothing care machine, and is easy to implement; it does not require additional internal space of the clothing care machine, and has a compact structure. The heating device and the boiler are separately arranged or integrally formed.

[0010] Preferably, a first heating tube is arranged in the boiler, and the heating device comprises a shell, wherein the shell is located on the outer peripheral side of the first heating tube and partially covers the first heating tube, a water inlet is arranged at the bottom of the shell, an exhaust pipe and a return pipe are arranged at the top of the shell, the exhaust pipe passes through the boiler and an outlet end thereof is connected to the steam pipe, the return pipe passes through the boiler and an inlet end thereof is connected to the exhaust pipe, and an outlet end of the return pipe is located in the boiler; the boiler further comprises a valve assembly for switching the mode of generating steam.

[0011] By integrating the heating device into the boiler, the control valve assembly can deliver steam to the injection device within the normal waiting time to achieve pre-care; this solution does not require improvement of other structures of the existing clothing care device, which is conducive to the miniaturization of the clothing care machine. Compared with the cavity of the boiler, the heating volume formed by the shell is smaller, and the heating power can be adjusted according to the length of the first heating tube, so that the water in the shell is quickly heated at several times or dozens of times the speed to generate steam, thereby effectively shortening the waiting time of the clothing care machine.

[0012] Preferably, the clothing care machine is provided with a control system, and the valve assembly is electrically connected to the control system. This arrangement can realize automatic control of the clothing care machine.

[0013] Preferably, the valve assembly includes a first valve located on the steam pipe for controlling the on-off of the water inlet, and the valve assembly also includes a second valve located on the exhaust pipe, the first valve is located between the outlet end of the exhaust pipe and the shell, and the second valve is located between the inlet end of the return pipe and the steam pipe. This arrangement has a simple structure, can realize switching between different steam generation modes, and is conducive to rapid and high-quality steam generation.

[0014] Preferably, the valve assembly further comprises a third valve, which is located on the reflux pipe and is arranged in parallel with the second valve. This arrangement can achieve precise control between steam reflux and output, and provide a good user experience.

[0015] Preferably, a water inlet pipe is also arranged at the top of the boiler, a drain outlet is arranged at the bottom of the boiler, and the outlet end of the return pipe is close to the side wall of the boiler and arranged in a horizontal direction. This arrangement can use the steam and water mixture sprayed by the return pipe to impact the water body in the boiler and generate a driving force, so that the water body in the boiler rotates, which is conducive to the concentration of scale and the like at the middle position of the bottom of the boiler and is convenient for discharge from the drain outlet, so that the boiler has a certain self-cleaning ability, high steam generation efficiency and long service life.

[0016] Preferably, the boiler further comprises a second heating tube, which is arranged in parallel with the first heating tube. This arrangement can adjust the operation mode of the clothing care machine as needed, and the maximum steam generation amount can be adjusted to meet diverse care needs.

[0017] Preferably, the return pipe is connected to the water supply assembly through a connecting pipe, and a control valve is arranged on the connecting pipe. This arrangement enables the water supply assembly to inject water into the boiler through the return pipe and / or the exhaust pipe into the shell, thereby avoiding air from being retained in the shell, and providing a good user experience.

[0018] Compared with the prior art, the clothing care machine of the present invention has the following beneficial effects:

[0019] 1) By setting a heating device in parallel with the boiler, the time to generate steam is shortened, the waiting time required is short, and the user experience is good;

[0020] 2) By integrating the heating device into the boiler, the control valve assembly can deliver steam to the injection device within the normal waiting time to achieve pre-care; there is no need to improve other structures of the existing clothing care device, which is conducive to miniaturization of the clothing care machine; the reasonable structure makes the boiler run safely and reliably without any safety hazards;

[0021] 3) The second heating tube is provided to diversify the operation modes of the clothing care machine, and the maximum steam volume can be adjusted to meet the care needs of different clothing and household items.

[0022] The present invention also provides a control method for a clothing care machine, including: S1, power on and accept user input instructions; S2, determine whether to run the first mode, if yes, enter step S4; if not, enter step S3; S3, determine whether to run the third mode, if yes, enter step S5, if not, enter step S6; S4, control the first heating tube to power on and generate steam according to a preset method; S5, control the first heating tube and the second heating tube to power on at the same time to generate steam; S6, control the second heating tube to power on and generate steam. The control method has the same beneficial effects as the clothing care machine, which will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1This is an overall diagram of the clothing care machine described in Example 1 of the present invention;

[0024] Figure 2 This is a structural schematic diagram of the clothing care machine according to Embodiment 1 of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of the boiler described in Example 2 of the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the boiler described in Example 3 of the present invention.

[0027] Description of reference numerals:

[0028] 1-water supply assembly; 11-water tank; 12-water pump; 13-reversing valve; 2-boiler; 21-first heating tube; 22-water inlet pipe; 23-drain outlet; 24-steam pipe; 25-first valve; 26-second heating tube; 3-heating device; 31-shell; 311-water inlet; 312-exhaust pipe; 313-return pipe; 314-second valve; 315-third valve; 4-injection device; 41-injection hole; 5-nursing cavity; 6-automation module. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. The technical features in the embodiments of the present invention can be combined with each other without conflict.

[0030] All directional indications in the embodiments of the present invention (such as up, down, left, right, front, back, etc.) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0031] In addition, in the present invention, the descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0032] With the improvement of living standards, people's demand for clothing care is becoming more personalized and diversified. Clothing care machines usually include a care box and a steam generator. The steam generated by the steam generator is introduced into the care box to care for the clothes in the care box. Usually, a heating tube set in a closed boiler is used to generate high-temperature and high-humidity steam. Due to the maximum power limit of the boiler, it takes about 3-4 minutes from heating to generating steam for care. For users, this is an ineffective waiting time, resulting in a poor experience. To this end, the applicant proposes the following technical solution:

[0033] Example 1

[0034] like Figure 1-2 As shown, a clothing care machine includes a water supply component 1, wherein the water supply component 1 is provided with a reversing valve 13, wherein the reversing valve 13 is respectively connected to a boiler 2 and a heating device 3 which are arranged in parallel, wherein the outlet ends of the boiler 2 and the heating device 3 are connected to an injection device 4 for injecting steam for clothing care. By providing the heating device 3 in parallel with the boiler 2, the time for generating steam is shortened, and the required waiting time is shortened, which can further improve the user experience.

[0035] Preferably, the clothing care machine further comprises a housing, in which a care cavity 5 for holding the clothing to be cared for is arranged, the water supply assembly 1 is located at the bottom of the care cavity 5 and comprises a connected water tank 11 and a water pump 12, for supplying water to the boiler 2 and the heating device 3; the spray device 4 has a spray hole 41 and is located above the care cavity 5, for uniformly spraying steam for care. As an example of the present invention, a heating assembly is arranged in the spray device 4, for secondary heating and heating the steam passing through.

[0036] As an example of the present invention, the water pump 12 can be an electromagnetic pump or a peristaltic pump. The number of the water pumps 12 can be two, which can supply water to the boiler 2 and the heating device 3 separately, or the water inlet direction can be controlled by a pump body + a one-way valve combination. Preferably, the clothing care machine also includes an automation module 6 that can move up and down, and the injection device 4 is located on the automation module 6. The specific structure of the automation module 6 is prior art and will not be described in detail here.

[0037] Its working principle is: water is pumped from the water tank 11 to the boiler 2 and the heating device 3 simultaneously or separately through the water pump 12, and the boiler 2 and the heating device 3 start to heat to generate steam; while generating steam, the heating device 3 outputs steam to the injection device 4 to perform pre-care for the target clothes; after the boiler 2 is heated to the set pressure or temperature, a large amount of high-temperature steam is output through the boiler 2 for secondary care; then the drying device is used to dry the clothes that have completed steam care.

[0038] Example 2

[0039] By setting a heating device 3 in parallel with the boiler 2, the waiting time when the clothing care machine is used can be shortened, but the added heating device 3 not only increases the hardware cost, but also requires additional space, which is obviously not conducive to the trend of equipment miniaturization. To this end, the applicant improves the boiler 2 based on the technology of Example 1:

[0040] like Figure 3As shown, a boiler 2 is provided with a water inlet pipe 22 connected to a water supply assembly 1 and a steam pipe 24 connected to an injection device 4, a first heating pipe 21 is provided in the boiler 2, a closed shell 31 is provided around the first heating pipe 21, a water inlet 311 is provided at the bottom of the shell 31, an exhaust pipe 312 and a return pipe 313 are provided at the top of the shell 31, the outlet end of the exhaust pipe 312 is connected to the steam pipe 24, the inlet end of the return pipe 313 is connected to the exhaust pipe 312, and the outlet end of the return pipe 313 is located in the boiler 2; the boiler 2 also includes a valve assembly for switching the mode of generating steam.

[0041] By integrating the heating device 3 into the boiler 2, the control valve assembly can deliver steam to the injection device 4 within the normal waiting time to achieve pre-care; this solution does not require improvement of other structures of the existing clothing care device, which is conducive to the miniaturization of the clothing care machine. Compared with the cavity of the boiler 3, the heating volume formed by the shell 31 is smaller, and the heating power can be adjusted according to the length of the coated first heating tube 21, so that the water in the shell 31 is quickly heated at several times or dozens of times the speed and generates steam, thereby effectively shortening the waiting time of the clothing care machine.

[0042] As an example of the present invention, the valve assembly includes a first valve 25 located on the steam pipe 24 for controlling the on-off of the water inlet 312, and the valve assembly also includes a second valve 314 located on the exhaust pipe 312 and a third valve 315 located on the return pipe 313. Preferably, the first valve 25 is located between the outlet end of the exhaust pipe 312 and the housing 31, and the second valve 314 is located between the inlet end of the return pipe 313 and the steam pipe 24. This arrangement has a simple structure, can realize switching between different steam generation modes, and is conducive to rapid and high-quality steam generation.

[0043] Specifically, after the clothing care machine is started, the first valve 25 and the second valve 314 are closed, and the third valve 315 is opened. After the first heating tube 21 is energized, the water in the boiler is heated in a conventional manner; and in the shell 31, relative to the covered first heating tube 21, the volume of the water to be heated is small and is quickly heated to generate steam. Since the shell 31 is full of water or air in the initial stage, the third valve 315 is opened to allow the generated steam, water mixture or air to flow back into the boiler 2 again, without affecting the normal heating of the boiler 2.

[0044] In a short period of time after the clothing care machine is started, the speed at which steam is generated in the shell 31 is greater than the speed at which steam is generated by the boiler 2 as a whole. The shell 31 generates positive pressure, thereby lowering the liquid level in the shell 31, effectively preventing hot water from entering the exhaust pipe 312 along with the high-temperature steam. At this time, the third valve 315 is closed and the second valve 314 is opened, and the shell 31 is used to normally provide steam to the injection device 4.

[0045] Since the amount of steam generated in the shell 31 is limited, it cannot meet the steam flow demand of the clothing care machine; therefore, when the steam in the boiler 2 reaches the standard, the first valve 25 and the third valve 315 are opened and the second valve 314 is closed, and steam is normally provided to the injection device 4 through the steam pipe 24 for clothing care.

[0046] Preferably, the first valve 25, the second valve 314, and the third valve 315 are located on the outside of the boiler 2. This arrangement is convenient for production and assembly, and the valve components do not need to be immersed in water for a long time, so they have a long service life.

[0047] Preferably, the housing 31 and the boiler 2 are provided with a first pressure gauge and a second pressure gauge, respectively, for detecting the pressure in the housing 31 and the boiler 2. Preferably, the return pipe 313 is connected to the water supply assembly 1 through a connecting pipe, and the connecting pipe is provided with a control valve. This arrangement enables the water supply assembly 1 to inject water into the boiler 2 through the return pipe 313 and / or the exhaust pipe 312 into the housing 31, thereby avoiding air from being retained in the housing 31, and providing a good user experience.

[0048] Preferably, a drain port 23 is provided at the bottom of the boiler 2, and the outlet end of the return pipe 313 is close to the side wall of the boiler 2 and is arranged in a horizontal direction. This arrangement can use the steam and water mixture ejected by the return pipe 313 to impact the water in the boiler 2 and generate a driving force, so that the water in the boiler 2 rotates, which is conducive to the concentration of scale and the like at the middle position of the bottom of the boiler 2 and is convenient for discharge from the drain port 23. This arrangement can enable the boiler 2 to have a certain self-cleaning ability, high steam generation efficiency and long service life.

[0049] Example 3

[0050] When generating steam, the first heating tube 21 of the boiler 2 is always in working state; after the clothing care machine runs stably, the amount of steam generated is fixed and cannot meet the diverse care needs; therefore, the applicant makes the following improvements based on Example 2:

[0051] like Figure 4As shown, a boiler 2 is provided with a water inlet pipe 22 connected to a water supply assembly 1 and a steam pipe 24 connected to an injection device 4, a first heating pipe 21 and a second heating pipe 26 connected in parallel are provided in the boiler 2, a closed shell 31 is provided around the first heating pipe 21, a water inlet 311 is provided at the bottom of the shell 31, an exhaust pipe 312 and a return pipe 313 are provided at the top of the shell 31, the outlet end of the exhaust pipe 312 is connected to the steam pipe 24, the inlet end of the return pipe 313 is connected to the exhaust pipe 312, and the outlet end of the return pipe 313 is located in the boiler 2; the boiler 2 also includes a valve assembly for switching the mode of generating steam.

[0052] If only the first heating tube 21 is turned on, the clothing care machine operates in the first mode, that is, the shell 31 is used to quickly generate steam and transport it outward through the exhaust pipe 312 for pre-care. After the steam in the boiler 2 meets the standard, the steam can be normally transported to the injection device 4 through the steam pipe 24 for care; if only the second heating tube 26 is turned on, the clothing care machine operates in the second mode, that is, the normal mode, that is, steam can be injected for care after waiting for 3-5 minutes; if the first heating tube 21 and the second heating tube 26 are turned on at the same time, the clothing care machine operates in the third mode, and steam is quickly generated through the shell 31 and transported outward through the exhaust pipe 312 for pre-care, further shortening the reflux time of the steam in the reflux shell 31 to improve the user experience, and at the same time the steam volume can be increased to meet the care needs of winter clothing and household items.

[0053] This aspect also provides a control method for a clothing care machine, comprising:

[0054] S1, power on and accept user input commands;

[0055] S2, determine whether to run the first mode, if yes, go to step S4; if no, go to step S3;

[0056] S3, determine whether to run the third mode, if yes, go to step S5, if no, go to step S6;

[0057] S4, controlling the first heating tube 21 to be powered on to generate steam according to a preset method.

[0058] The preset method is specifically as follows:

[0059] S41, close the first valve 25 and the second valve 314, and open the third valve 315;

[0060] Compared with the boiler 2, the volume of water to be heated in the shell 31 is small and is quickly heated to generate steam. Since the shell 31 is full of water or air in the initial stage, the generated steam, water mixture or air can flow back into the boiler 2 by opening the third valve 315, which does not affect the normal heating of the boiler 2.

[0061] S42, detecting the pressure p1 and temperature T1 of the reflux pipe 313 every 2-4 seconds;

[0062] S43, determine whether the pressure p1 of the reflux pipe 313 is greater than p 设1 And T1>T 设1 If yes, go to step S44; if no, return to S42;

[0063] The speed at which steam is generated in the shell 31 is greater than the speed at which steam is generated by the boiler 2 as a whole. The shell 31 generates positive pressure, thereby lowering the liquid level in the shell 31, effectively preventing hot water from entering the exhaust pipe 312 along with the high-temperature steam. When the temperature and pressure meet the requirements, the shell 31 can be used to normally provide steam to the injection device 4.

[0064] S44, close the third valve 315 and open the second valve 314;

[0065] S45, detecting the pressure p2 and temperature T2 in the boiler 2 every 2-4 seconds;

[0066] S46: Determine whether the pressure p2 of the reflux pipe 313 is greater than p 设2 And T2>T 设2 If yes, go to step S47; if no, return to S45;

[0067] Since the amount of steam generated in the shell 31 is limited, it cannot meet the steam flow demand of the clothing care machine; when the steam in the boiler 2 reaches the standard, steam is normally provided to the injection device 4 through the steam pipe 24 for clothing care.

[0068] S47, open the first valve 25 and the third valve 315 and close the second valve 314.

[0069] S5, controlling the first heating tube 21 and the second heating tube 26 to be powered on simultaneously to generate steam.

[0070] Steam is quickly generated through the housing 31 and transported outward through the exhaust pipe 312 for pre-care, further shortening the reflux time of the steam in the reflux housing 31 to improve the user experience, while increasing the amount of steam to meet the care needs of winter clothing and household items. The detection parameter operation of generating steam in step S5 is consistent with or similar to step S4, and will not be repeated here.

[0071] S6, control the second heating tube 26 to be powered on to generate steam. At this time, the clothing care machine operates in a conventional mode, and its control method is prior art and will not be described in detail here.

[0072] The present invention also provides a readable storage medium, characterized in that an application is stored on the readable storage medium, and when the application is executed by a processor, the control method of the clothing care machine is implemented. The readable storage medium has the same beneficial effects as the control method of the clothing care machine, which will not be described in detail here.

[0073] The computer-readable storage medium may be a readable storage medium or a readable signal medium, and may be the same as the storage unit mentioned above, for example: a USB flash drive, a mobile hard disk, a ROM, a RAM, a magnetic disk or an optical disk, etc. In the embodiments provided in the present application, it should be understood that the disclosed devices and methods may be implemented in other ways. The device embodiments described above are merely schematic, for example, the division of the units is only a logical function division, and there may be other division methods in actual implementation, multiple units or components may be combined or may be integrated into another system, or some features may be ignored or not executed. The mutual coupling or direct coupling or communication connection shown or discussed may be an indirect coupling or communication connection through some interfaces, devices or units, and may be electrical, mechanical or other forms.

[0074] Although the present invention is disclosed as above, the present invention is not limited thereto. Any person skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the scope defined by the claims.

Claims

1. A clothing care machine, characterized in that: It comprises a water supply component (1), wherein the water supply component (1) is respectively connected to a boiler (2) and a heating device (3) which are arranged in parallel, and the outlet ends of the boiler (2) and the heating device (3) are connected to an injection device (4) for rapidly generating and injecting steam.

2. The clothing care machine according to claim 1, characterized in that: The clothing care machine further comprises a casing, wherein a care cavity (5) is arranged inside the casing for containing clothing to be cared for; the water supply assembly (1) is located at the bottom of the care cavity (5) and comprises a connected water tank (11) and a water pump (12), and is used to supply water to the boiler (2) and the heating device (3); the spraying device (4) has a spraying hole (41) and is located above the care cavity (5), and is used to spray steam outward evenly.

3. The clothing care machine according to claim 1, characterized in that: A steam pipe (24) connected to the injection device (4) is arranged on the top of the boiler (2), and the heating device (3) is arranged inside the boiler (2).

4. The clothing care machine according to claim 3, characterized in that: A first heating tube (21) is arranged in the boiler (2); the heating device (3) comprises a shell (31); the shell (31) is located on the outer peripheral side of the first heating tube (21) and partially covers the first heating tube (21); a water inlet (311) is arranged at the bottom of the shell (31); an exhaust pipe (312) and a return pipe (313) are arranged at the top of the shell (31); the exhaust pipe (312) passes through the boiler (2) and its outlet end is connected to the steam pipe (24); the return pipe (313) passes through the boiler (2) and its inlet end is connected to the exhaust pipe (312); the outlet end of the return pipe (313) is located in the boiler (2); the boiler (2) also comprises a valve assembly for switching the mode of generating steam.

5. The clothing care machine according to claim 4, characterized in that: The valve assembly comprises a first valve (25) located on the steam pipe (24) for controlling the on / off of the water inlet (311), and the valve assembly further comprises a second valve (314) located on the exhaust pipe (312), wherein the first valve (25) is located between the outlet end of the exhaust pipe (312) and the shell (31), and the second valve (314) is located between the inlet end of the return pipe (313) and the steam pipe (24).

6. The clothing care machine according to claim 5, characterized in that: The valve assembly further comprises a third valve (315), wherein the third valve (315) is located on the return pipe (313) and is arranged in parallel with the second valve (314).

7. The clothing care machine according to claim 6, characterized in that: A water inlet pipe (22) is also arranged at the top of the boiler (2), a water outlet (23) is arranged at the bottom of the boiler (2), and the outlet end of the return pipe (313) is close to the side wall of the boiler (2) and is arranged in a horizontal direction.

8. The clothing care machine according to any one of claims 4 to 7, characterized in that: The boiler (2) further comprises a second heating tube (26), wherein the second heating tube (26) is arranged in parallel with the first heating tube (21).

9. The clothing care machine according to claim 4, characterized in that: The return pipe (313) is connected to the water supply assembly (1) via a connecting pipe, and a control valve is provided on the connecting pipe.

10. The control method of the clothing care machine according to claim 8-9, characterized in that: include: S1, power on and accept user input commands; S2, determine whether to run the first mode, if so, proceed to step S4; If not, proceed to step S3; S3, determine whether to run the third mode, if yes, go to step S5, if no, go to step S6; S4, controlling the first heating tube (21) to be powered on to generate steam according to a preset method; S5, controlling the first heating tube (21) and the second heating tube (26) to be powered on simultaneously to generate steam; S6. Control the second heating tube (26) to be powered on to generate steam.

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