CN217039663U - Heating plate assembly and steam electric appliance - Google Patents

Abstract

The utility model discloses a heating plate subassembly and steam electrical apparatus, heating plate subassembly include heating plate, generate heat piece, first temperature sensor and second temperature sensor. The heating plate includes the diapire and encircle connect in the circumferential lateral wall of diapire, the diapire is undercut, makes the diapire is formed with first step face and highly is less than the second step face of first step face, the piece that generates heat is installed in the diapire, first temperature sensor butt in first step face deviates from one side of lateral wall, second temperature sensor butt in the second step face deviates from one side of lateral wall. The utility model discloses technical scheme realizes having reduced the risk of dry combustion method in steam electrical apparatus, has promoted steam electrical apparatus's life.

Description

Heating plate assembly and steam electric appliance

Technical Field

The utility model relates to a life electrical apparatus technical field, in particular to heating plate assembly and applied this heating plate assembly's steam electrical apparatus.

Background

The steam electric appliance such as an electric steamer, a steam mop, an electric iron and the like structurally heats water through the heating plate assembly to generate high-temperature steam, and the high-temperature steam is used for food cooking, clothes ironing, cleaning and sterilizing and the like. However, in the correlation technique, the heating plate subassembly among the steam electrical apparatus structurally passes through the bottom of installing the heating plate of temperature controller in the water tank, such mode, the temperature controller just can jump off and add water after the water in the water tank is burnt dry, this steam that can lead to the steam electrical apparatus to produce is intermittent and continuous, and many times dry combustion method also can shorten complete machine life-span, other schemes are then avoided the water tank dry combustion method through program control heating time, such scheme is very big when initial water feeding volume change or ambient temperature change, can lead to in the water tank water level to spill over or also can lead to dry combustion method to cause the complete machine life-span to shorten.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a heating plate assembly aims at realizing reducing the risk of dry combustion method in steam electrical apparatus, promotes steam electrical apparatus's life.

In order to achieve the above object, the heating plate assembly provided by the present invention comprises a bottom wall and a side wall connected to the periphery of the bottom wall in a surrounding manner, wherein the bottom wall is recessed downward, so that a first step surface and a second step surface with a height lower than that of the first step surface are formed on the bottom wall;

the heating piece is arranged on the bottom wall;

the first temperature sensor is abutted against one side, away from the side wall, of the first step surface; and

and the second temperature sensor is abutted against one side of the second step surface, which is far away from the side wall.

The technical proposal of the utility model is that two step surfaces with different heights are formed on the heating plate of the heating plate component, and a first temperature sensor and a second temperature sensor are arranged to be respectively abutted against the first step surface and the second step surface, therefore, when the heating plate component is applied to a steam electrical appliance, in the running process, when enough water exists in the heating cavity of the steam electrical appliance, the two step surfaces are covered by water, the detection temperatures of the first temperature sensor and the second temperature sensor are equivalent because of the heat conduction of water in the heating process, and when the water level in the steam electrical appliance is reduced, the first step surface is exposed above the liquid level, because of the cooling effect of no water, the temperature detected by the first temperature sensor has obvious temperature difference with the second temperature sensor, at the moment, the judgment can be more accurate, the water level in the steam electrical appliance is already reduced to the height of needing to add water, therefore, reliable control basis can be provided for the subsequent water adding or operation stopping heating part of the steam electric appliance, the dry burning phenomenon in the steam electric appliance is effectively avoided, and the service life of the steam electric appliance is prolonged.

Optionally, the second step surface is disposed in the middle of the bottom wall, and the first step surface is disposed around the second step surface.

Optionally, still include heat-conducting plate and conducting strip, the heat-conducting plate attach in the diapire deviates from one side of lateral wall and with the shape looks adaptation of diapire, generate heat the piece install in the heat-conducting plate deviates from one side of diapire, the heat-conducting plate has been seted up and has been dodged the mouth, conducting strip one end is connected generate heat the piece, and the other end stretches into dodge mouth and butt first step face, first temperature sensor with the conducting strip contact the one end looks butt of first step face, second temperature sensor with the heat-conducting plate corresponds the part butt of second step face.

Optionally, the heating element is a heating tube, the heat conducting fin includes a first mounting end connected to the heating tube, a second mounting end abutted to the first step surface, and a connecting section connecting the first mounting end and the second mounting end, and the connecting section is spaced from the heat conducting plate.

Optionally, the distance between the connecting section and the heat conducting plate is not less than 1 mm.

Optionally, a gap exists between the first mounting end and the heat conducting plate, and the gap is not less than 1 mm.

Optionally, the heat conducting plate further comprises a first pressing plate connected with the heat conducting plate, and the first temperature sensor is clamped by the first pressing plate and the heat conducting plate.

Optionally, the temperature sensor further comprises a second pressure plate connected with the heat conducting plate, and the second temperature sensor is clamped by the second pressure plate and the heat conducting plate.

Optionally, the heat conduction plate further comprises a temperature controller, and the temperature controller is abutted with the part of the heat conduction plate corresponding to the second step surface.

The utility model also provides a steam electric appliance, including the casing, as above heating disc subassembly, control circuit board and water pump assembly, the casing is formed with heating chamber and aqua storage tank, heating disc subassembly install in the bottom in heating chamber, water pump assembly intercommunication the aqua storage tank with the heating chamber, control circuit board is used for the temperature that first temperature sensor detected with when the difference of the temperature that second temperature sensor detected is greater than the default, control water pump assembly moves in order to extract water in the aqua storage tank enters into in the heating chamber.

Optionally, the water storage tank is annularly arranged outside the heating cavity.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.

Fig. 1 is a schematic view of a heating plate assembly according to an embodiment of the present invention;

FIG. 2 is an exploded schematic view of the structure of FIG. 1;

FIG. 3 is a schematic diagram of a top view of the structure of FIG. 1;

FIG. 4 is a cross-sectional structural schematic of the structure of FIG. 1;

fig. 5 is an exploded view of a steam appliance according to an embodiment of the present invention;

FIG. 6 is a schematic view of a portion of the structure of FIG. 5;

fig. 7 is another schematic diagram of a portion of the structure of fig. 5.

The reference numbers indicate:

the objects, features and advantages of the present invention will be further described with reference to the accompanying drawings.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.

It should be noted that all the directional indicators (such as upper, lower, left, right, front and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.

In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicit ly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of the feature. In addition, "and/or" in the whole text includes three schemes, taking a and/or B as an example, and includes a technical scheme a, a technical scheme B, and a technical scheme that a and B meet simultaneously; in addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, the combination of the technical solutions should not be considered to exist, and is not within the protection scope of the present invention.

The utility model provides a heating plate assembly 100.

Referring to fig. 1 to 4, in an embodiment, the heating plate assembly 100 includes a heating plate 110, a heating element 120, a first temperature sensor 140, and a second temperature sensor 150, the heating plate 110 includes a bottom wall 111 and a side wall 112 connected to a periphery of the bottom wall 111, a middle portion of the bottom wall 111 is recessed downward, so that the bottom wall 111 is formed with a first step surface 110a and a second step surface 110b having a height lower than the first step surface 110a, the first step surface 110a is disposed around the second step surface 110b, that is, the first step surface 110a is connected to the sidewall 112 and is disposed in a ring shape, the second step surface 110b is a top surface of a boss formed by the bottom wall 111 protruding downward, the first temperature sensor 140 abuts on a side of the first step surface 110a away from the sidewall 112, and the second temperature sensor 150 abuts on a side of the second step surface 110b away from the sidewall 112.

In the heating plate assembly 100 of the present invention, the heating plate 110 is used to cooperate with the steam appliance 300 to form the heating cavity 210a, two step surfaces with different heights are formed on the heating plate 110 of the heating plate assembly 100, the heating plate 110 is made of metal material, wherein the bottom wall 111 and the side wall 112 can be an integral structure, for example, the bottom wall 111 and the side wall 112 are made of aluminum alloy material or iron alloy material and are integrally formed by die casting, of course, the bottom wall 111 and the side wall 112 can also be fixed together by welding, the first temperature sensor 140 and the second temperature sensor 150 disposed in the heating plate assembly 100 are respectively abutted against the first step surface 110a and the second step surface 110b, therefore, when the heating plate assembly 100 is applied to the steam appliance 300, in the operation process, when there is enough water in the heating cavity 210a of the steam appliance 300, both step surfaces are covered by water, in the heating process, because of the heat conduction of water, the detection temperatures of the first temperature sensor 140 and the second temperature sensor 150 are equivalent, and when the water level in the steam electric appliance 300 drops, the first step surface 110a is exposed above the liquid level, because of no cooling effect of water, the temperature detected by the first temperature sensor 140 has an obvious temperature difference with the second temperature sensor 150, at the moment, the judgment can be more accurate, the water level in the steam electric appliance 300 is already reduced to the height of water to be added, so that a reliable control basis can be provided for the subsequent water addition or the stop operation of the heating element 120 of the steam electric appliance 300, the dry burning phenomenon in the steam electric appliance 300 is effectively avoided, and the service life of the steam electric appliance 300 is prolonged.

In an embodiment, the heating plate assembly 100 further includes a heat conducting plate 113 and a heat conducting plate 130, the heat conducting plate 113 is attached to the bottom wall 111 deviates from one side of the side wall 112 and is matched with the shape of the bottom wall 111, the heat generating member 120 is installed in the heat conducting plate 113 deviates from one side of the bottom wall 111, the heat conducting plate 113 is provided with a avoiding opening 114, one end of the heat conducting plate 130 is connected to the heat generating member 120, the other end of the heat conducting plate extends into the avoiding opening 114 and abuts against the first step surface 110a, the first temperature sensor 140 is contacted with the heat conducting plate 130, one end of the first step surface 110a is abutted, and the second temperature sensor 150 is abutted against the part of the second step surface 110b corresponding to the heat conducting plate 113. In this embodiment, the heating plate 110 is formed to have a structure with a downward convex middle portion, the heat conducting plate 113 is also formed with a convex boss structure in the middle portion, so that the heat conducting plate 113 can be attached to the lower surface of the bottom wall 111, and the heat generated by the heating member 120 can be uniformly transmitted to the first step surface 110a, the second step surface 110b and other areas of the whole bottom wall 111 through the heat conducting plate 113, in order to accurately implement temperature detection, the heat conducting plate 113 is provided with the avoiding opening 114, and the heat conducting plate 130 is provided to extend into the avoiding opening 114 and contact with the first step surface 110a, therefore, in the using process, the heat conducting plate 113 can meet the premise that the temperature of the heating member 120 is uniformly transmitted to the bottom wall 111 in the heating process, and the heat conducting plate 130 can transmit the temperature of the heating member 120 to the first step surface 110a to avoid interference of the heat conducting plate 113, when the liquid level is lower than the first step surface 110a, because there is no liquid cooling effect, the temperature value detected by the first temperature sensor 140 will change significantly, and at this time, the second temperature sensor 150 has a liquid covering because the abutting position corresponds to the second step surface 110b, and the temperature value detected by the second temperature sensor 150 is equivalent to that before, so that a large difference is generated between the values detected by the first temperature sensor 140 and the second temperature sensor 150, thereby providing a relatively accurate control basis for the steam appliance 300.

In this embodiment, the heat generating member 120 is a heat generating tube, the heat conducting sheet 130 includes a first mounting end 131, a second mounting end 133 and a connecting section 132 connected between the first mounting end 131 and the second mounting end 133, the first mounting end 131 is fixedly connected to the heat generating member 120, the second mounting end 133 abuts against the first step surface 110a, the first temperature sensor 140 contacts with the second mounting end 133, and the connecting section 132 is spaced from the heat conducting plate 113. In this embodiment, the heat conducting sheet 130 is formed by bending a sheet metal part, for example, the heat conducting sheet 130 may be formed by an aluminum alloy plate, and the first mounting end 131, the second mounting end 133 and the connecting section 132 are formed by bending, but the heat conducting sheet 130 may also be formed by other materials, for example, a copper alloy with a higher heat conductivity or a heat conducting ceramic material. Wherein, the connecting section 132 and the heat conducting plate 113 are arranged at intervals, and in the heat conduction process of the heat conducting plate 130, the heat can not be lost due to the contact with the heat conducting plate 113, thus being beneficial to the accuracy in the liquid level judgment process. Here, it should be emphasized that the utility model discloses a scheme is superior to the effect of the dry combustion method of traditional mode, the reason still lies in, because the utility model discloses a scheme is compared through the temperature that two temperature sensor detected, because the temperature all changes in real time in the operation process, under the same condition that has water to cover, the temperature variation trend of the two is similar, and when the liquid level was less than the top surface of first step face 110a, first temperature sensor 140 will break away from original variation curve, and produce obvious deviation with the value that second temperature sensor 150 detected, this kind of mode, can avoid the great drawback of error that traditional single temperature sensor carries out the mode of comparison through detected value and setting value. It can be understood that, even when the amount of water initially existing in the steam appliance 300 is very small or even lower than the top surface of the first step surface 110a, the present invention is able to obtain an accurate judgment that the liquid level is low at this time because the values of the two temperature sensors will have a significant deviation, and these advantages are difficult to achieve in the conventional structure.

Referring to fig. 4, in an embodiment, the connecting section 132 is spaced apart from the heat conducting plate 113, so that a distance between the connecting section 132 and a wall surface of the avoiding opening 114 on the heat conducting plate 113 is not less than 1 mm. In the drawings, the heating element 120 is in the form of a heating tube, the first mounting end 131 is in a multi-section hook shape and is clamped outside the heating tube, so that a gap of not less than 1 mm is formed between the end of the first mounting end 131 and the heat conducting plate 113, and heat conducted from the heating element 120 to the heat conducting plate 130 can be prevented from dissipating from the heat conducting plate 113, and the conditions that the temperature rises slowly at the second mounting end 133 and the detection sensitivity is reduced are avoided.

In one embodiment, the heater tray assembly 100 further comprises a first platen 180 and a second platen 190 mounted on the thermally conductive plate 113, the first platen 180 spans the relief opening 114, the first temperature sensor 140 is clamped by the first platen 180 and the thermally conductive plate 130, the second platen 190 is coupled to the thermally conductive plate 113, and the second temperature sensor 150 is clamped by the second platen 190 and the thermally conductive plate 113. In this embodiment, the heat conducting plate 113 is fixedly connected with a mounting post, the first pressing plate 180 and the second pressing plate 190 are fixedly connected with the mounting post, and the assembly process is simple and the mounting structure is stable by the way of compressing the first pressing plate 180 and the second pressing plate 190.

In order to further improve the safety of the heating pan assembly 100 during the operation process, the heating pan assembly 100 of this embodiment further includes a temperature controller 160, the temperature controller 160 abuts against the portion of the heat conducting plate 113 corresponding to the second step surface 110b, and the fixed connection manner of the temperature controller 160 and the heat conducting plate 113 may refer to the installation manner of the first temperature sensor 140 and the second temperature sensor 150, which is not described herein again. The temperature controller 160 may disconnect a circuit of the steam appliance 300 that supplies power to the heating element 120 when the temperature detected by the second temperature sensor 150 reaches a preset value, that is, stop the operation of the heating plate assembly 100 when the temperature detected by the second temperature sensor 150 indicates that the heating plate assembly 100 is in a dry-fire condition, thereby providing further safety guarantee for the heating plate assembly 100.

Referring to fig. 1 to 7, the present invention further provides a steam appliance 300, where the steam appliance 300 includes a casing 210, a heating plate assembly 100, a control circuit board 250 and a water pump assembly 260, and the specific structure of the heating plate assembly 100 refers to the above embodiments, and since the steam appliance 300 adopts all technical solutions of all the above embodiments, all the beneficial effects brought by the technical solutions of the above embodiments are at least provided, and are not repeated herein. Wherein, the housing 210 is formed with a heating cavity 210a and a water storage tank 210b, the heating plate assembly 100 is installed at the bottom of the heating cavity 210a, the water pump assembly 260 is communicated with the water storage tank 210b and the heating cavity 210a, and the control circuit board 250 is used for controlling the water pump assembly 260 to operate to pump the water in the water storage tank 210b into the heating cavity 210a when the difference between the temperature detected by the first temperature sensor 140 and the temperature detected by the second temperature sensor 150 is greater than a preset value.

The steam electric appliance 300 of the present invention can be an electric steamer, a steam mop, a steam oven, an electric chafing dish, etc. on the market, and in the structure shown in fig. 5 to 7, the steam electric appliance 300 is an electric steamer as an example, the shell comprises a shell 220, a middle frame 230 and a condensed water return tray 240, the shell 220 and the middle frame 230 are enclosed to form an installation cavity (not marked), the condensed water return tray 240 and the middle frame 230 cover to form a water storage tank 210b and a heating cavity 210a, a steam outlet 241 communicated with the heating cavity 210a is formed in the condensed water return tray 240, the steam appliance 300 further comprises a pot cover 270 and a steam drawer 280 and the like, the steam drawer 280 covers the condensed water return tray 240 to form a cache cavity in a matched mode, a plurality of steam passing holes are uniformly formed in the steam drawer 280, food, a cup and the like are placed on the steam drawer 280 when the steam appliance is used, and the pot cover 270 covers an upper opening of the machine shell 210 and covers the steam drawer 280. The heating plate assembly 100 is installed on the middle frame 230 and covers the bottom of the heating cavity 210a, and the water pump assembly 260 and the control circuit board 250 are located in the installation cavity.

This application shell 220 is upper portion open-ended bowl form, and the center 230 is connected with shell 220 and forms before the downside of center 230 and shell 220 the installation cavity, condensed water return dish 240 lid closes the upside at center 230 in order to form aqua storage tank 210b and heating chamber 210a two parts with center 230, and wherein shell 220, center 230 and condensed water return dish 240 can all adopt the plastics material, or shell 220 adopts the plastics material, and center 230 adopts the plastics material, and condensed water return dish 240 adopts the metal material, of course shell 220, center 230 and condensed water return dish 240 can also adopt other materials, and this application does not limit this.

Wherein, shell 220 and center 230 can adopt buckle, screwed connection etc. to need not destroy the structure and connect promptly detachable mode, and certainly shell 220 and center 230 can also adopt for example sticky, welding, riveting etc. and need destroy the fixed connection that the structure could be dismantled, and this application does not do the restriction to this yet, and above-mentioned connected mode can be adopted equally with center 230 to condensation water return dish 240 in the same way, and this application does not restrict this. Further, the present application is further provided with a handle, wherein the handle is fixed with the condensed water return plate 240, and the handle is further fixed with the outer shell 220 and the middle frame 230, wherein a connection hole may be provided on the handle, and the handle, the outer shell 220, the middle frame 230 and the condensed water return plate 240 are fixed together by screws, whereby the whole steam appliance 300 may be integrally moved by the handle.

In one embodiment, the water storage tank 210b is disposed around the outside of the heating chamber 210 a. This embodiment is through encircleing the aqua storage tank 210b and setting in the heating chamber 210a outside, in steam electrical apparatus 300 use, heating chamber 210a produces higher temperature, can carry out the separation through aqua storage tank 210b and absorb, the user can not directly touch heating chamber 210a part, can avoid the risk of scald, and heating chamber 210 a's temperature directly transmits to aqua storage tank 210b, can carry out heat absorption through aqua storage tank 210b, produce certain preheating effect in the use. In this embodiment, the water storage tank 210b may surround the heating cavity 210a for a circle or may surround the heating cavity 210a for a half circle, and the water storage tank 210b surrounds the heating cavity 210a for a quarter of a three-circle on the premise of compact structure. Of course, in other embodiments, the water storage tanks 210b may be arranged side by side.

Referring to fig. 5 again, in the using process of the electric steamer with the above scheme of the present application, the heating plate 110 heats the water in the heating cavity 210a to generate steam, because the heating cavity 210a is disposed inside the water storage tank 210b, heat generated in the high-temperature steam heat radiation process is not easily dissipated outwards, the steam can reach the space between the steam drawer 280 and the condensed water return tray 240 through the steam outlet 241 of the condensed water return tray 240 and is uniformly diffused, because the condensed water return tray 240 only has the steam outlet 241 corresponding to the heating cavity 210a, the steam can be well gathered in the space between the condensed water return tray 240 and the steam drawer 280, and cannot escape everywhere, so that heat loss is also small. And evaporate and evenly seted up the steam passing hole on the steamer tray 280, high temperature steam heats parts such as food, handleless cup on evaporating the steamer tray 280 after passing through the steam passing hole, combine above-mentioned content, because this application steam electrical apparatus has still set up the scheme that above-mentioned temperature detected, under the less condition of its water yield, can be by accurate detection come out, and then carry out subsequent action of adding water and provide accurate judgement basis, the phenomenon of burning futilely can not appear, so ensure the steam that produces continuous, consequently in the boiling process, the condition that steam is continuous can not appear, it is effectual to cook, the taste of the food of making is also preferred.

The above is only the optional embodiment of the present invention, and not the scope of the present invention is limited thereby, all the equivalent structure changes made by the contents of the specification and the drawings are utilized under the inventive concept of the present invention, or the direct/indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims (11)

1. A heating pan assembly, comprising:

the heating plate comprises a bottom wall and a side wall connected to the periphery of the bottom wall in a surrounding mode, wherein the bottom wall is downwards sunken, so that a first step surface and a second step surface which is lower than the first step surface in height are formed on the bottom wall;

the heating piece is arranged on the bottom wall;

the first temperature sensor is abutted against one side, away from the side wall, of the first step surface; and

and the second temperature sensor is abutted against one side of the second step surface, which is far away from the side wall.

2. The heating pan assembly of claim 1, wherein the second step surface is disposed at a central portion of the bottom wall and the first step surface is disposed about the second step surface.

3. The heating plate assembly of claim 1, further comprising a heat conducting plate and a heat conducting plate, wherein the heat conducting plate is attached to one side of the bottom wall departing from the side wall and matched with the shape of the bottom wall, the heating element is installed on one side of the bottom wall departing from the heat conducting plate, the heat conducting plate is provided with an avoiding opening, one end of the heat conducting plate is connected with the heating element, the other end of the heat conducting plate extends into the avoiding opening and abuts against the first step surface, the first temperature sensor contacts with the heat conducting plate to abut against one end of the first step surface, and the second temperature sensor corresponds to the partial abutting against of the second step surface with the heat conducting plate.

4. The heater tray assembly according to claim 3, wherein the heat generating member is a heat generating tube, the heat conducting plate includes a first mounting end connected to the heat generating tube, a second mounting end abutting against the first step surface, and a connecting section connecting the first mounting end and the second mounting end, and the connecting section is spaced apart from the heat conducting plate.

5. A heater tray assembly according to claim 4, wherein the spacing between the connecting section and the thermally conductive plate is no less than 1 mm.

6. A heater tray assembly according to claim 4, wherein there is a gap between the first mounting end and the thermally conductive plate, the gap being no less than 1 mm.

7. A heater tray assembly according to claim 3, further comprising a first pressure plate coupled to the thermally conductive plate, the first temperature sensor being clamped by the first pressure plate and the thermally conductive plate.

8. A heater tray assembly as set forth in claim 3, further comprising a second pressure plate coupled to the thermally conductive plate, the second temperature sensor being clamped by the second pressure plate and the thermally conductive plate.

9. The heater tray assembly of claim 3, further comprising a thermostat abutting a portion of the thermally conductive plate corresponding to the second step surface.

10. A steam appliance comprising a housing, a heater tray assembly according to any one of claims 1 to 9, a control circuit board, and a water pump assembly, wherein the housing defines a heating chamber and a water storage tank, the heater tray assembly is mounted at the bottom of the heating chamber, the water pump assembly is connected to the water storage tank and the heating chamber, and the control circuit board is configured to control the water pump assembly to operate to pump water from the water storage tank into the heating chamber when a difference between a temperature detected by the first temperature sensor and a temperature detected by the second temperature sensor is greater than a predetermined value.

11. The steam appliance of claim 10, wherein the water storage tank is annularly disposed outside the heating chamber.

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