Suction type heater

Abstract

The invention discloses a suction type heater which comprises a body, a base arranged on the lower portion of the body and a power plug connected with the body, a water storage cavity and a steam cavity are formed in the body, a base cavity is formed in the base, a temperature control heating system is arranged in the base cavity, and a water pumping control system is further arranged in the body. The water inlet end of the temperature control heating system is communicated with the water storage cavity, and the water outlet end of the temperature control heating system is communicated with the steam cavity; a water pumping outlet of the water pumping control system is connected with the water storage cavity, and an electric wire of the power plug is connected with the temperature control heating system and the water pumping control system. The water pumping control system is arranged in the body, and drinking water can be automatically added into the water storage cavity under the action of the driving motor and the pump head in the water pumping control system, so that the defect that the drinking water needs to be manually added into the water storage cavity is overcome, and operation of a user is more convenient.

Description

Technical Field

[0001] The invention relates to the technical field of electric heating, in particular to a suction heater. Background Art

[0002] There are various tea makers or coffee brewers on the market, especially those that use steam to brew tea or coffee, which are very popular among people.

[0003] According to the investigation, the steam-type tea maker or coffee brewer and other similar products on the market now require users to manually add drinking water to them after the last use before they can be used again. In addition, the unreasonable location of the water storage chamber of these products, the small water inlet and the very small water storage chamber capacity have many unfavorable factors, which make it very inconvenient for the majority of users to use them. Not only do users need to add water frequently, but they also need to be extra careful when adding water, which is very unfavorable for people's normal use. Therefore, how to effectively solve the technical defects of existing steam-type tea makers or coffee brewers that cannot automatically add water is currently a top priority for people. Summary of the invention

[0004] The object of the present invention is to overcome the above problems and provide a suction heater.

[0005] The present invention is achieved through the following technical scheme: a suction heater, including a main body, a base arranged at the lower part of the main body and a power plug connected to the main body, a water storage chamber and a steam chamber are provided inside the main body, a base chamber is provided inside the base, a temperature control heating system is provided inside the base chamber, and a water pumping control system is also provided inside the main body; the water inlet end of the temperature control heating system is connected to the water storage chamber, and the water outlet end thereof is connected to the steam chamber; the water pumping outlet of the water pumping control system is connected to the water storage chamber, and the wires of the power plug are respectively connected to the temperature control heating system and the water pumping control system.

[0006] As one of the preferred methods, the water pumping control system consists of a PCB circuit board, a driving motor and a pump head connected to the driving motor, the wires of the power plug are connected to the PCB circuit board, the power end of the driving motor is connected to the PCB circuit board, and the pump head is provided with a water pumping inlet and a water pumping outlet, and the water pumping inlet is the water pumping inlet of the water pumping control system, and the water pumping outlet is the water pumping outlet of the water pumping control system.

[0007] For the convenience of control, a touch switch or switch button connected to or in contact with the PCB circuit board is provided on the body or the base.

[0008] As the second preferred method, the water pumping control system consists of a water pumping switch, a driving motor and a pump head connected to the driving motor, the wire of the power plug is connected to the water pumping switch, the power end of the driving motor is connected to the water pumping switch, and the pump head is provided with a water pumping inlet and a water pumping outlet, and the water pumping inlet is the water pumping inlet of the water pumping control system, and the water pumping outlet is the water pumping outlet of the water pumping control system.

[0009] Furthermore, the temperature control heating system consists of a heater, a metal heating tube tightly connected and fixed to the outer surface of the heater, a temperature controller tightly connected to the outer surface of the metal heating tube, and a water inlet hose connected to one end of the metal heating tube and a water outlet hose connected to the other end of the metal heating tube; the water inlet hose is the water inlet end of the temperature control heating system, which is connected to the water storage chamber; the water outlet hose is the water outlet end of the temperature control heating system, which is connected to the steam chamber directly or through a steam spray assembly.

[0010] To facilitate operation and placement of objects to be brewed, an openable and closable upper shell cover is provided on the top of the main body, a shelf hole is provided at the bottom of the steam chamber, and a detachable filter funnel is also provided inside the steam chamber, and the bottom of the filter funnel is located in the shelf hole.

[0011] Alternatively, a pull-out and push-back shelf chuck is provided at the upper part of the body, and the shelf chuck is located at the middle or bottom of the steam chamber. Further, a chuck through hole is provided on the shelf chuck, and a detachable filter funnel is provided inside the chuck through hole.

[0012] In order to facilitate the placement of the kettle body, the present invention provides a kettle body placement area at the middle position of the kettle body, and also provides a kettle body heating and heat preservation area on the base.

[0013] As one of the preferred embodiments, the heating and heat preservation zone of the kettle body is composed of a metal plate arranged on the base, and the metal plate is tightly and fixedly connected to the outer surface of the heater.

[0014] As a second preferred embodiment, the kettle body heating and heat preservation zone is composed of a metal plate arranged on the base and an electric heating wire arranged inside or at the bottom of the metal plate.

[0015] As a third preferred embodiment, the kettle body heating and heat preservation zone is composed of a metal plate arranged on the base, an electric heating wire arranged inside or at the bottom of the metal plate, and a temperature controller connected to the electric heating wire and used to control its temperature.

[0016] Compared with the prior art, the present invention has the following advantages and beneficial effects:

[0017] (1) The present invention can effectively heat drinking water into steam through a temperature control heating system disposed inside the base cavity, and then steam or brew tea leaves, coffee and other items placed in the steam cavity. This can not only effectively prevent tea leaves, coffee and other items from being repeatedly boiled in water, but also effectively separate tea leaves from tea water, thereby ensuring the taste and quality of tea water and other brewing water.

[0018] (2) The present invention can be used not only for brewing tea, but also for brewing coffee and other products suitable for brewing, so it has a very wide range of applications.

[0019] (3) The present invention is provided with a water pumping control system inside the main body. Through the action of the driving motor and the pump head inside the water pumping control system, drinking water can be automatically added to the water storage chamber, thereby avoiding the defect of manually adding drinking water to the water storage chamber and making it more convenient for users to operate.

[0020] (4) The present invention is provided with a kettle body heating and heat preservation zone on the main body, and the kettle body heating and heat preservation zone can be set with a plurality of different temperature values. The user can flexibly select the heat preservation temperature value for heat preservation according to his own needs, and its adaptability is very wide. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention when an upper shell cover is provided;

[0022] Figure 2 for Figure 1 A schematic cross-sectional view of the structure shown;

[0023] Figure 3 for Figure 1 A schematic diagram of a partial cross-section structure when the structure shown is configured as a kettle body;

[0024] Figure 4 This is a schematic diagram of the overall structure of the present invention when the upper shell cover is not provided;

[0025] Figure 5 for Figure 4 The schematic diagram of the local cross-section structure shown;

[0026] Figure 6 It is the circuit control principle diagram of the present invention.

[0027] The reference numerals in the above drawings are:

[0028] 1-main body, 2-base, 3-water storage chamber, 4-steam chamber, 5-base chamber, 6-temperature control and heating system, 7-water pumping control system, 8-upper shell cover, 9-shelf clamping disc, 10-pot body shelving area, 11-pot body heating and insulation area, 12-heating switch, 41-shelf hole, 42-filter funnel, 61-heater, 62-metal heating tube, 63-temperature controller, 64-water inlet hose, 65-water outlet hose, 71-PCB circuit board, 72-drive motor, 73-pump head, 731-water pumping inlet, 732-water pumping outlet, 74-water pumping switch, 91-clamping disc through hole, 111-metal disc, 112-electric heating wire. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below in conjunction with examples, but the embodiments of the present invention are not limited thereto.

[0030] Example 1

[0031] like Figures 1 to 3 As shown, the body 1 in this embodiment can be made of metal or plastic into any shape, and a base 2 is provided at the lower part of the body 1. The base 2 and the body 1 can be formed integrally, or can be provided separately and then fixed together by screws or bolts. A cavity area is provided at the middle position of the body 1, and the cavity area and the base 2 together form a pot body placement area 10 for placing the pot body.

[0032] The body 1 or the base 2 is provided with a power plug connected to an external power socket, and the body 1 is provided with a water storage chamber 3 for storing drinking water and a steam chamber 4 for steaming or brewing. The base 2 is provided with a base chamber 5, and the base chamber 5 is provided with a temperature control heating system 6 for heating the drinking water in the water storage chamber 3 and transmitting it to the steam chamber 4.

[0033] The positions of the water storage chamber 3 and the steam chamber 4 can be arbitrarily set inside the main body 1 according to the situation, and the volume of the water storage chamber 3 determines the amount of drinking water that can be stored. Therefore, the capacity of the water storage chamber 3 should be as large as possible than the volume of the steam chamber 4.

[0034] In order to replenish the water storage chamber 3 with drinking water in a timely and convenient manner, the present embodiment is provided with a water pumping control system 7 inside the body 1. Under the control of the user, the water pumping control system 7 can extract drinking water from external barreled water or direct current water and inject it into the water storage chamber 3, thereby avoiding the defect that the user needs to manually add drinking water to the water storage chamber 3.

[0035] The wires of the power plug are respectively connected to the relevant power control terminals or power supply terminals of the temperature control and heating system 6 and the water pumping control system 7 to provide working current and voltage for the temperature control and heating system 6 and the water pumping control system 7.

[0036] The temperature control heating system 6 is composed of a heater 61, a metal heating tube 62, a temperature controller 63, a water inlet hose 64 and a water outlet hose 65. When connected, the power supply end of the heater 61 is connected to the corresponding wire in the power plug to ensure that after the power plug is connected to an external power socket, the heater 61 can have current passing through it and generate heat. The metal heating tube 62 is used to heat the drinking water flowing through it, so the metal heating tube 62 needs to be tightly and fixedly connected to the outer surface of the heater 61 to ensure effective heat transfer between the metal heating tube 62 and the heater 61. In order to facilitate the overall installation and the connection of other components, after the metal heating tube 62 and the heater 61 are tightly fixed, the upper surfaces of the two need to be in the same horizontal plane.

[0037] The power supply end of the temperature controller 63 is connected in series to the circuit of the heater 61, and is also closely connected to the outer surface of the metal heating tube 62, so that the temperature controller 63 can timely detect the temperature of the metal heating tube 62. When the temperature of the metal heating tube 62 is higher than the preset maximum temperature of the temperature controller 63, the internal circuit of the temperature controller 63 will be disconnected, thereby cutting off the power supply of the heater 61, so that it will no longer generate heat; when the temperature of the metal heating tube 62 is lower than the preset minimum temperature of the temperature controller 63, the internal circuit of the temperature controller 63 will be turned on, thereby turning on the power supply of the heater 61, so that it will continue to generate heat, and finally ensure that the drinking water inside the metal heating tube 62 is in a constant temperature range.

[0038] One end of the metal heating pipe 62 is connected to the water inlet hose 64, and the other end of the water inlet hose 64 is the water inlet end of the entire temperature control heating system, and it is connected to the water storage chamber 3. The other end of the metal heating pipe 62 is connected to the water outlet hose 65, and the other end of the water outlet hose 65 is the water outlet end of the entire temperature control heating system, which is directly or through the steam spray component. Connected to the steam chamber 4.

[0039] In order to control the opening and closing of the heater 61, a heating switch 12 is also required to be provided on the body 1 or the base 2. That is, when the heating switch 12 is turned on, the heater 61 will be powered on to generate heat; when the heating switch 12 is turned off, the heater 61 will be powered off to stop generating heat. The heating switch 12 can be directly connected in series to the circuit of the heater 61 to achieve its function and purpose, or it can be electrically connected to the PCB circuit board 71 to achieve its function and purpose.

[0040] When the heater 61 is working, under the action of gravity, the drinking water in the water storage chamber 3 flows into the metal heating tube 62 through the water inlet hose 64. The metal heating tube 62 is heated by the heat transfer of the heater 61, thereby heating the drinking water inside the pipe at a high temperature, turning the drinking water into steam, and then transporting it to the steam chamber 4 from the water outlet hose 65.

[0041] To ensure that the drinking water in the water storage chamber 3 can normally enter the metal heating pipe 62, the water inlet end of the water inlet hose 64 is located higher than the metal heating pipe 62. At the same time, to improve the heat exchange performance, the metal heating pipe 62 can be made into a U-shaped pipe, a spiral pipe or an S-shaped pipe, etc., but no matter what shape it is, the metal heating pipe 62 should be in full contact with the heater 61 as much as possible.

[0042] To ensure the use effect, the heater 61 is preferably implemented by a heating tube, a heating coil or an electric heating tube, and the temperature controller 63 must match the power and model of the heater 61. Generally speaking, the heating tube or heating coil can be 200V 300W to 800W. Of course, according to the actual situation, the power of the heating tube or heating coil can also be arbitrarily configured. The greater the power, the greater the efficiency of heat transfer and the shorter the time to heat the liquid drinking water into steam.

[0043] In order to further ensure the safety performance of the heater 61, a fuse or a fusible wire can be connected in series in the circuit of the heater 61 to prevent the heater 61 from being damaged due to overvoltage or overcurrent. The fuse or fusible wire can be a product produced by various manufacturers on the market, for example, the SEFUSE SF series fuse can be used. This series of fuses is a temperature overheating fuse tube with a metal shell and thermosensitive particles (organic chemicals) as a heat-sensitive body. Since the structure of the thermosensitive material is not energized, the internal impedance is small, the current is large, and it can be applied to 10A~15A (AC) circuits. Of course, the fuse can also be replaced by a fuse tube, and its function and effect are the same.

[0044] The temperature controller 63 can be implemented by using a KSD302 normally closed thermostat. The so-called normally closed thermostat means that in the original state, the internal contacts of the temperature controller are in a closed state. Only when the temperature exceeds the preset temperature value, the internal contacts of the temperature controller will be disconnected, thereby realizing the temperature control function. Alternatively, the temperature controller can also be implemented by using an adjustable temperature controller, such as an adjustable thermostat with a digital display or a knob-type adjustable thermostat.

[0045] The water pumping control system 7 can be arranged inside the water storage cavity 3 or inside the base cavity 5 .

[0046] As one of the implementation methods of this embodiment, the pumping control system 7 can be composed of a PCB circuit board 71, a drive motor 72, and a pump head 73 connected to the drive motor 72. Among them, the wires of the power plug should be connected to each circuit of the PCB circuit board 71 to provide working voltage and current for each control circuit. The power supply end of the drive motor 72 is connected to the corresponding circuit connection end of the PCB circuit board 71.

[0047] The pump head 73 is provided with a water inlet 731 and a water outlet 732, and the water inlet 731 is the water inlet of the water pumping control system, and the water outlet 732 is the water outlet of the water pumping control system. When connected, the water inlet 731 is connected to a drinking water bucket or other external water source through a hose, and the water outlet 732 is directly connected to the water storage chamber 3 or connected to the water storage chamber 3 through a hose. In order to avoid large water flow noise when the water pumping control system 7 is pumping water, its water outlet 732 is preferably set at the bottom of the water storage chamber 3.

[0048] At the same time, a pumping switch 74 for controlling the pumping water level is also provided on the body 1 or the base 2 and is connected to or in contact with the PCB circuit board 71. The pumping switch 74 can be set at any position of the body 1 or the base 2, and can be set alone or together with other switches.

[0049] When in use, the pump switch 74 is turned on, and the relevant driving circuit on the PCB circuit board 71 will be powered, thereby driving the motor 72 to operate. At this time, the pump head 73, driven by the driving motor 72, will suck the external drinking water source from the pumping inlet 731 and continuously discharge it from the pumping outlet 732, thereby achieving the purpose of continuously injecting drinking water into the water storage chamber 3. When the drinking water reaches a preset height or a preset time, the PCB circuit board 71 will automatically cut off the power supply of the driving motor 72, and the pump head 73 will stop working, and then stop injecting drinking water into the water storage chamber 3. As needed, the user can also manually control the closing of the pump switch 74, thereby achieving the purpose of arbitrarily controlling the amount of water injected into the water storage chamber 3.

[0050] As a second implementation of this embodiment, the water pumping control system 7 may be composed of a water pumping switch 74, a drive motor 72, and a pump head 73 connected to the drive motor 72. Similarly, the wire of the power plug is connected to the water pumping switch 74, and the water pumping switch 74 is directly connected to the power supply end of the drive motor 72. Compared with the first implementation, the only difference is that the water pumping control system 7 is not provided with a PCB circuit board 71, but directly controls the opening and closing of the drive motor 72 through the water pumping switch 74.

[0051] The pump head 73 can be realized by a small air pump, a peristaltic pump and an impeller pump. Similarly, in this embodiment, any small pump that can achieve pumping and drainage can be used to replace the small air pump, the peristaltic pump or the impeller pump, and there is no mandatory requirement in this embodiment.

[0052] In order to prevent the drinking water in the water storage chamber 3 from overflowing, a water level controller can be provided in the water storage chamber 3 in this embodiment to ensure that when the drinking water in the water storage chamber 3 reaches a specified height, the operation of the driving motor 72 is forcibly cut off. The control circuit of the water level controller can be directly connected in series to the power circuit of the driving motor 72 or connected to the PCB circuit board 71.

[0053] As required, corresponding functional circuits may be arranged on the PCB circuit board 71, such as a water filling time countdown circuit, a heating indicator light display circuit, etc. These circuits may be connected to corresponding electronic components or devices arranged on the body 1 or the base 2. Since these contents belong to the current conventional technical contents, the present invention will not elaborate on them.

[0054] To ensure the use effect, the water inlet hose 64, the water outlet hose 65 and the hose of the water pumping outlet 732 are preferably arranged parallel and vertically. According to actual needs, the water inlet hose 64, the water outlet hose 65 and the hose of the water pumping outlet 732 can be made of soft plastic, hard plastic or metal material. In order to facilitate the observation of the water storage volume of the water storage chamber 3, an observation hole can be provided at the position of the water storage chamber 3 of the body 1, and a scale line is also provided on the observation hole; or, the position of the water storage chamber 3 of the body 1 is made of a transparent material.

[0055] In order to facilitate the steaming or brewing of tea or coffee and other beverages in the steam chamber 4, a shelf hole 41 is provided at the bottom of the steam chamber 4 in this embodiment, and a detachable filter funnel 42 is also provided inside the steam chamber 4, and the bottom of the filter funnel 42 is located in the shelf hole 41. The shape of the shelf hole 41 can be arbitrarily set according to needs, and it only needs to be connected to the steam chamber 4 to ensure that the high-temperature steam sprayed from the water outlet hose 65 can enter the steam chamber 4, and then brew the solid beverage such as tea or coffee placed in the filter funnel 42.

[0056] The detachable filter funnel 42 means that the filter funnel 42 can be taken out from the steam chamber 4, that is, the filter funnel 42 is not integral with the steam chamber 4 and the shelf hole 41. In order to facilitate placing beverages in the filter funnel 42, an openable and closable upper shell cover 8 is also required on the top of the body 1.

[0057] As another implementation, the present embodiment may not be provided with the upper shell cover 8, but a pull-out and push-back storage chuck 9 may be directly provided at the upper position of the body 1. That is, a cavity is provided on the body 1 at the middle or bottom position of the steam chamber 4, and the storage chuck 9 is built inside the cavity, and the user can pull out or push back the storage chuck 9 from the cavity, just like opening and closing a drawer.

[0058] Alternatively, as another method, one side of the shelf chuck 9 is fixed to one side of the cavity via a rotating shaft, and when the shelf chuck 9 is pulled out or pushed back, the shelf chuck 9 will rotate around the rotating shaft, thereby achieving the purpose of opening and closing the shelf chuck 9. Similarly, in order to facilitate the placement of the filter funnel 42, a chuck through hole 91 matching the filter funnel 42 can also be provided on the shelf chuck 9.

[0059] In order to facilitate the placement of the kettle body, a kettle body placement area 10 is provided in the middle of the main body 1, and in order to keep the kettle body placed on the base 2 warm, a kettle body heating and heat preservation area 11 is also provided on the base 2. When the kettle body is placed inside the kettle body placement area 10, the bottom of the kettle body is just located on the kettle body heating and heat preservation area 11.

[0060] The first solution of the kettle body heating and heat preservation zone 11 is that it is composed of a metal plate 111 arranged on the base 2, and the metal plate 111 is tightly and fixedly connected to the outer surface of the heater 61. Since the upper surface of the heater 61 and the upper surface of the metal heating tube 62 are in the same plane, the bottom of the metal plate 111 is tightly and fixedly connected to the upper surface of the heater 61. When the heater 61 is working, its heat can be transferred not only to the metal heating tube 62, but also to the metal plate 111, so as to cause the metal plate 111 to heat up, thereby heating and heat-insulating the kettle body placed on the metal plate 111.

[0061] The second solution of the kettle body heating and heat preservation zone 11 is that the kettle body heating and heat preservation zone 11 can be composed of a metal plate 111 and an electric heating wire 112 arranged inside or at the bottom of the metal plate. In this case, the electric heating wire 112 can be connected to the PCB circuit board 71 or to the power plug to ensure that the PCB circuit board 71 or the power plug can provide the electric heating wire 112 with working current and voltage.

[0062] The third scheme of the kettle body heating and heat preservation zone 11 is that the kettle body heating and heat preservation zone 11 is composed of a metal plate 111 arranged on the base 2, an electric heating wire 112 arranged inside or at the bottom of the metal plate, and a temperature controller connected to the electric heating wire 112 and used to control its temperature. The advantage of adopting this method is that the heat of the electric heating wire 112 can be controlled by the temperature controller, and its temperature range can be adjusted arbitrarily according to needs, such as ensuring that the kettle body heating and heat preservation zone 11 is at a constant temperature of 40 degrees, 50 degrees or 60 degrees by adjusting the temperature of the temperature controller.

[0063] As described above, the present invention can be well implemented.

Claims

1. A suction heater, comprising a body (1), a base (2) arranged at the lower part of the body (1), and a power plug connected to the body (1), characterized in that: A water storage chamber (3) and a steam chamber (4) are provided inside the body (1); a base chamber (5) is provided inside the base (2); a temperature control and heating system (6) is provided inside the base chamber (5); and a water pumping control system (7) is also provided inside the body (1); a water inlet end of the temperature control and heating system (6) is connected to the water storage chamber (3), and a water outlet end thereof is connected to the steam chamber (4); a water pumping outlet of the water pumping control system (7) is connected to the water storage chamber (3), and the wires of the power plug are respectively connected to the temperature control and heating system (6) and the water pumping control system (7).

2. A suction heater according to claim 1, characterized in that: The water pumping control system (7) is composed of a PCB circuit board (71), a driving motor (72) and a pump head (73) connected to the driving motor (72); the wire of the power plug is connected to the PCB circuit board (71); the power supply end of the driving motor (72) is connected to the PCB circuit board (71); the pump head (73) is provided with a water pumping inlet (731) and a water pumping outlet (732); the water pumping inlet (731) is the water pumping inlet of the water pumping control system; and the water pumping outlet (732) is the water pumping outlet of the water pumping control system.

3. A suction heater according to claim 2, characterized in that: A pumping switch (74) for controlling the pumping water level and connected to or in contact with the PCB circuit board (71) is provided on the body (1) or the base (2).

4. A suction heater according to claim 1, characterized in that: The water pumping control system (7) is composed of a water pumping switch (74), a driving motor (72) and a pump head (73) connected to the driving motor (72); the electric wire of the power plug is connected to the water pumping switch (74); the power supply end of the driving motor (72) is electrically connected to the water pumping switch (74); the pump head (73) is provided with a water pumping inlet (731) and a water pumping outlet (732); the water pumping inlet (731) is the water pumping inlet of the water pumping control system; and the water pumping outlet (732) is the water pumping outlet of the water pumping control system.

5. The suction heater according to claim 1, characterized in that: The temperature control heating system (6) is composed of a heater (61), a metal heating tube (62) tightly connected to the outer surface of the heater (61), a temperature controller (63) tightly connected to the outer surface of the metal heating tube (62), a water inlet hose (64) connected to one end of the metal heating tube (62), and a water outlet hose (65) connected to the other end of the metal heating tube; the water inlet hose (64) is the water inlet end of the temperature control heating system, which is connected to the water storage chamber (3); the water outlet hose (65) is the water outlet end of the temperature control heating system, which is directly connected to the steam chamber (4) or through a steam injection assembly.

6. The suction heater according to claim 1, characterized in that: An upper shell cover (8) that can be opened and closed is provided on the top of the main body (1), a shelf hole (41) is provided at the bottom of the steam chamber (4), and a detachable filter funnel (42) is also provided inside the steam chamber (4), and the bottom of the filter funnel (42) is located in the shelf hole (41).

7. The suction heater according to claim 1, characterized in that: A pull-out and push-back placing chuck (9) is also provided at the upper position of the body (1), and the placing chuck (9) is located at the middle or bottom position of the steam chamber (4).

8. A suction heater according to any one of claims 1 to 7, characterized in that: A kettle body heating and heat preservation area (11) is provided on the base (2).

9. A suction heater according to claim 8, characterized in that: The kettle body heating and heat preservation zone (11) is composed of a metal plate (111) arranged on the base (2), and the metal plate (111) is tightly and fixedly connected to the outer surface of the heater (61).

10. The suction heater according to claim 8, characterized in that: The kettle body heating and heat preservation zone is composed of a metal plate (111) arranged on the base (2) and an electric heating wire (112) arranged inside or at the bottom of the metal plate; or, the kettle body heating and heat preservation zone is composed of a metal plate (111) arranged on the base (2), an electric heating wire (112) arranged inside or at the bottom of the metal plate, and a temperature controller connected to the electric heating wire (112) and used to control the temperature thereof.

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