Double-Layer Electric Heating Plate and Steam Brush

This application claims priority to Chinese Patent Application 202410709009.3, filed on May 31, 2024, which is incorporated herein by reference.

The disclosure relates to the field of household appliances, in particular to the field of ironing equipment, and further relates to a double-layer electric heating plate and a steam brush.

A steam brush softens fiber texture of clothes and cloth by making hot steam generated inside continuously contact the clothes and cloth, and makes the clothes and cloth as flat as new by pulling, pressing and spraying actions.

The steam flow channel of the electric heating plate of the steam brush in the market is typically a single-layer flow channel, and water from the water inlet is directly ejected out of steam holes of the electric heating plate after being vaporized only through the single-layer flow channel of the electric heating plate. The design of the single-layer flow channel makes heat generated by the electric heating tube unable to be utilized efficiently and thoroughly and makes the steam brush only applicable within a limited range of angle. The steam brush can be used only when it is horizontal, and once the angle exceeds a certain value, the electric heating plate will drip due to insufficient vaporization, which is a fatal flaw for a handheld product like a steam brush.

Therefore, a double-layer heating structure capable of improving the heating efficiency of the electric heating plate, as disclosed in Chinese patent No. CN202881728U, entitled a heater and a garment steamer using the same, has also appeared in the market. However, despite of the double-layer heating structure, each layer has a single channel, and the two layers are in communication with each other through only one through opening. When this double-layer heating structure is applied to a steam brush product, the steam brush may be used at any angle, so water in the electric heating plate will be easily accumulated at a lower position in a tilted direction, and after the first heating layer is filled with water, the water will flow to the next heating layer. In the prior art, since both of the two heating layers respectively have only one channel, it takes a long time for water to fill the first heating layer, and there is a large amount of water accumulated. Moreover, during the process of accumulating water in the first heating layer, the second heating layer is short of water, which leads to insufficient steam ejection for a long time when switching angles. Due to the large amount of accumulated water in the first heating layer, the liquid water is not heated enough in the first heating layer. After the liquid water reaches the second heating layer, it is not vaporized enough, and finally, it is easy to spray water droplets at the steam outlets, which greatly affects ironing.

Therefore, in order to solve the above problems, the disclosure provides a double- layer electric heating plate and a steam brush.

In order to achieve the above objective, the disclosure provides the following technical solution:

A double-layer electric heating plate includes an electric heating plate body. The electric heating plate body has a first heating layer and a second heating layer facing away from each other. The first heating layer and the second heating layer are respectively provided with at least two channel units. The electric heating plate body is provided with a plurality of through openings. The channel units of the first heating layer and the channel units of the second heating layer are in communication with each other end to end in a staggered manner through the plurality of through openings to obtain heating channels running back and forth between the first heating layer and the second heating layer. A head end of the heating channels is connected to a water inlet on the electric heating plate body, and a tail end of the heating channels is connected to steam outlets on the electric heating plate body.

Further, the first heating layer has two channel units, namely a first channel unit and a third channel unit, and the second heating layer has two channel units, namely a second channel unit and a fourth channel unit. The electric heating plate body is provided with three through openings, namely a first through opening, a second through opening and a third through opening. A head end of the first channel unit is connected to the water inlet on the electric heating plate body. The first through opening is in communication with a tail end of the first channel unit and a head end of the second channel unit, and the second through opening is in communication with a tail end of the second channel unit and a head end of the third channel unit. The third through opening is in communication with a tail end of the third channel unit and a head end of the fourth channel unit, and the fourth channel unit is connected to the steam outlets as the tail end of the heating channels.

Further, the electric heating plate body includes an upper cover plate, a heating shell, an ironing soleplate and a heater. The upper cover plate covers an upper surface of the heating shell and forms the first heating layer together therewith. The water inlet is provided on the upper cover plate. The ironing soleplate covers a lower surface of the heating shell and forms the second heating layer together therewith. The steam outlets are provided on the ironing soleplate. The heater is arranged in the heating shell.

Further, the heater is a U-shaped heating tube formed by two opposite straight heating sections and a curved heating section connecting the two straight heating sections. The curved heating section of the U-shaped heating tube corresponds to a front side of the heating shell. The two straight heating sections of the U-shaped heating tube correspond to left and right sides of the heating shell. Two ends of the U-shaped heating tube are exposed at a rear side of the heating shell for external wiring.

Further, the water inlet is provided corresponding to the curved heating section of the heater, and at least the channel unit connected to the water inlet is extended and arranged along an arrangement direction of the heater.

Further, the plurality of through openings are away from the water inlet of the electric heating plate body.

Further, the plurality of through openings are provided at a same side.

Further, channel side walls of each of the channel units extend to an inside of a channel to form blocking walls without partitioning.

Further, a temperature sensor is further assembled in the electric heating plate body. The temperature sensor is arranged upstream of the channel unit connected to the water inlet.

Further, the electric heating plate body is provided with a mounting recess at a middle position of the first heating layer, and the temperature sensor is potted in the mounting recess.

A steam brush includes at least the above double-layer electric heating plate.

The technical solution provided by the disclosure has the following beneficial effects:

The first heating layer and the second heating layer of the double-layer electric heating plate are respectively provided with the at least two channel units which form the heating channels running back and forth, so that the individual channels are shortened on the premise that an area of the heating layers of the electric heating plate remains unchanged, thereby increasing the number of the heating channels. During use, as the steam brush switches among different directions, water accumulated at a lower position can fill an individual channel in a short time and quickly enter the next channel unit through the corresponding through opening, so that a retention time of the accumulated water is shortened, which makes the heating more thorough and uniform. The liquid water can be heated and vaporized in time, which ensures a continuous output of steam and prevents the steam brush from dripping when used at all angles.

To further illustrate the examples, the accompanying drawings are provided in the disclosure. These accompanying drawings are a part of the contents disclosed in the disclosure that are mainly used to illustrate the examples, and can be used in conjunction with the related descriptions in the specification to explain the operation principle of the examples. With reference to these contents, those of ordinary skill in the art should be able to understand other possible embodiments and advantages of the disclosure. Components in the drawings are not drawn to scale, and like component symbols are usually used to represent like components.

In the description of the disclosure, the orientation or positional relationship indicated by the term "upper", "lower", "left", "right", "front", "rear" or the like is based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the disclosure and simplifying the operation, and does not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation of the disclosure.

The disclosure will be further described in conjunction with the accompanying drawings and specific embodiments.

Referring toto, this example provides a double-layer electric heating plate, including an electric heating plate body 10. The electric heating plate body 10 has a first heating layer 101 and a second heating layer 102 facing away from each other. The first heating layer 101 and the second heating layer 102 are respectively provided with two channel units 20. Specifically, the first heating layer 101 has two channel units 20, as shown in, namely a first channel unit 21 and a third channel unit 23, and the second heating layer 102 has two channel units 20, as shown in, namely a second channel unit 22 and a fourth channel unit 24. The electric heating plate body 10 is provided with three through openings 30, namely a first through opening 31, a second through opening 32 and a third through opening 33.

The channel units 20 of the first heating layer 101 and the channel units 20 of the second heating layer 102 are in communication with each other end to end in a staggered manner through the three through openings 30 to obtain heating channels running back and forth between the first heating layer 101 and the second heating layer 102. Specifically, a head end of the first channel unit 21 (i.e., a head end of the heating channels) is connected to a water inlet 111 on the electric heating plate body 10, the first through opening 31 is in communication with a tail end of the first channel unit 21 and a head end of the second channel unit 22, and the second through opening 32 is in communication with a tail end of the second channel unit 22 and a head end of the third channel unit 23. The third through opening 33 is in communication with a tail end of the third channel unit 23 and a head end of the fourth channel unit 24, and the fourth channel unit 24 is connected to steam outlets 131 as a tail end of the heating channels.

This example further provides a steam brush, which adopts the double-layer electric heating plate described above.

When in use, liquid water flows into the first channel unit 21 of the first heating layer 101 through the water inlet 111, and then sequentially flows through the first through opening 31, the second channel unit 22, the second through opening 32, the third channel unit 23, the third through opening 33 and the fourth channel unit 24. As shown inand, line a, line b, line c and line d are sequentially connected. During this process, the liquid water is continuously heated in the channel units 20 of the first heating layer 101 and the second heating layer 102 until it is vaporized into high-temperature steam, and the high-temperature steam is finally ejected from the steam outlets 131.

The first heating layer 101 and the second heating layer 102 are respectively provided with at least two channel units 20 which form the heating channels running back and forth, so that the number of the channels is increased on the premise that an area of the heating layers remains unchanged, i.e., the individual channels are shortened. During use, as the steam brush switches among different directions, for example, from a horizontal state to a tilted state, water flows downwards and accumulates at a lower position of the channel units 20. As the water continuously enters through the water inlet 111, it can fill the current channel unit 20 in a short time and quickly enter the next channel unit 20 through the corresponding through opening 30, so that a retention time of the accumulated water is shortened. That is, the water in each channel unit 20 can flow to the next channel unit 20 in time and quickly flow back and forth between the first heating layer 101 and the second heating layer 102, which makes the heating more thorough and uniform. The liquid water can be heated and vaporized in time, which ensures a continuous output of steam and prevents the steam brush from dripping when used at all angles.

Specifically, in this example, the plurality of steam outlets 131 are distributed at intervals along an extension direction of the fourth channel unit 24 so as to meet the quantity and area of the ejected steam.

The electric heating plate body 10 includes an upper cover plate 11, a heating shell 12, an ironing soleplate 13 and a heater 14. The heating shell 12 has a first heating recess provided on an upper surface thereof and a second heating recess provided on a lower surface thereof. The upper cover plate 11 covers the upper surface of the heating shell 12 and forms the first heating layer 101 together with the first heating recess. The water inlet 111 is provided on the upper cover plate 11. The ironing soleplate 13 covers the lower surface of the heating shell 12 and forms the second heating layer 102 together with the second heating recess. The steam outlets 131 are provided on the ironing soleplate 13. The heater 14 is arranged in the heating shell 12. In this way, the structural design of the electric heating plate body is realized.

Specifically, the heater 14 is a U-shaped heating tube formed by two opposite straight heating sections 141 and a curved heating section 142 connecting the two straight heating sections 141. The curved heating section 142 of the heater 14 corresponds to a front side of the heating shell 12. The two straight heating sections 141 of the heater 14 respectively correspond to left and right sides of the heating shell 12. Two ends of the heater 14 are exposed at a rear side of the heating shell 12 for external wiring.

Specifically, bottom surfaces of the first heating recess and the second heating recess of the heating shell 12 are covered with raised protrusions 15, which can effectively increase the heating area and make the heating more efficient.

The water inlet 111 is provided corresponding to the heater 14. Specifically, the water inlet 111 is provided corresponding to the curved heating section 142 of the heater 14. At least the channel unit 20 connected to the water inlet 111 (i.e., the first channel unit 21) is extended and arranged along an arrangement direction of the heater 14. The water inlet 111 corresponds to the front side of the heating shell 12, the head end of the first channel unit 21 is located at the front side of the heating shell 12, and the first channel unit 21 extends along an outer side of the heating shell 12 to the rear side of the heating shell 12, with reference to line a shown in, so that the liquid water that has just entered can thoroughly absorb heat of the curved heating section 142 so as to realize efficient heating. Further, the second channel unit 22 connected to the first channel unit 21 is also extended and arranged along the arrangement direction of the heater 14, and the second channel unit 22 is distributed on the second heating layer 102 in such a way that it directly extends from a first outer side from rear to front and then extends from a second outer side from front to rear so as to form a U-shaped channel corresponding to the heater 14, as shown by line b in.

In order to further fully utilize the space and improve the heating efficiency, the third channel unit 23 is also extended and arranged along the arrangement direction of the heater 14. Specifically, the third channel unit 23 in the first heating layer 101 is also mainly distributed on the second outer side of the heating shell 12. In this way, the liquid water can be efficiently heated, the heat source can be fully utilized, and the vaporization efficiency is improved.

Specifically, the plurality of through openings 30 are provided at a same side. As in this example, the first through opening 31, the second through opening 32 and the third through opening 33 are all provided at the rear side of the heating shell 12. This is because when the steam brush is in use, water is generally more likely to be accumulated at the rear side of the heating shell 12 as the steam brush is held by a hand. The water accumulated at this position can quickly enter the adj acent channels to be heated due to the presence of the through openings. In addition, as the heater 14 is not arranged at the rear side of the heating shell 12, the rear side of the heating shell can be run through to form the through openings 30.

The plurality of through openings 30 are away from the water inlet 111 of the electric heating plate body 10. As in this example, the water inlet 111 corresponds to the front side of the heating shell 12, and the plurality of through openings 30 are provided at the rear side of the heating shell 12. As the water that has just entered from the water inlet 111 has a low temperature, the plurality of through openings 30 are provided away from the water inlet 111. On the one hand, this prevents the water entering from the water inlet 111 from being unable to fully utilize the heat of the heater at the front end of the heating shell 12. On the other hand, this prevents the low temperature near the water inlet 111 from affecting the temperature at the through openings 30 and further affecting the vaporization because the water flowing through the through openings 30 has basically reached a high temperature.

Specifically, channel side walls of each of the channel units 20 extend to an inside of a channel to form blocking walls 16 without partitioning, which can further increase the transmission distance on the premise of a limited channel length, thereby making the heating more thorough.

A temperature sensor is further assembled in the electric heating plate body 10. The temperature sensor is configured to sense a heating temperature of the electric heating plate body 10, so as to control the operation of the heater 14. Specifically, a temperature signal sensed by the temperature sensor is transmitted to an external controller, and the controller controls the operation of the heater 14 according to an actual detected temperature. The control principle belongs to the prior art and will not be described in detail.

The temperature sensor is arranged close to the water inlet 111 of the electric heating plate body 10 to detect the temperature of the region with a lower temperature in the electric heating plate body 10, which can ensure the region with a lower temperature to be continuously heated, thereby ensuring the overall heating.

Further, the electric heating plate body 10 is provided with a mounting recess 121 at a middle position of the first heating layer 101, and the temperature sensor is potted in the mounting recess 121, so that the temperature sensor can be assembled and can accurately detect the temperature of the electric heating plate body directly. Specifically, the mounting recess 121 is formed in the heating shell 12 and exposed from the upper cover plate 11, which facilitates the assembly operation and can effectively prevent the steam in the electric heating plate body 10 from infiltrating into the mounting recess 121.

This example provides a double-layer electric heating plate, which has a structure substantially the same as in Example I, except that: in this example, the first heating layeris provided with two channel units, and the second heating layeris provided with three channel units. Specifically, the number of the through openingsis four, and the two channel unitsof the first heating layerand the three channel unitsof the second heating layerare in communication with each other end to end in a staggered manner through the four through openingsto obtain heating channels running back and forth between the first heating layerand the second heating layer. The head end and the tail end of the heating channels are both at the second heating layer. The water inletand the steam outletsare respectively connected to the head end and the tail end of the heating channels.

Moreover, the heater 14 includes a plurality of independent heating tubes that are uniformly distributed in the heating shell 12, which can also realize heating.

This example provides a steam brush, which adopts the double-layer electric heating plate of this example.

Example I and Example II respectively disclose two preferred example implementations in this solution, and of course, other examples are not limited thereto. For example, the number of the channel units 20 of the first heating layer 101 or the number of the channel units 20 of the second heating layer 102 may also be three or more, as long as the channel units 20 of the first heating layer 101 and the channel units 20 of the second heating layer 102 are in communication with each other end to end in a staggered manner to obtain the heating channels running back and forth between the first heating layer 101 and the second heating layer 102. The positions where the plurality of through openings 30 are distributed are also not limited, for example, the plurality of through openings may be distributed on the left and right sides. The shape in which the channel units 20 are arranged is also not limited, and may be designed according to the actual situation. The electric heating plate body 10 may also be assembled from more structural components.

Although the disclosure has been specifically shown and described in connection with the preferred embodiments, it should be understood by those skilled in the art that various changes in form and details can be made without departing from the spirit and scope of the disclosure as defined by the appended claims, and shall all fall within the protection scope of the disclosure.