Heating device and cleaning apparatus

Abstract

The utility model discloses a kind of heating device and cleaning equipment with it, wherein heating device provides high-temperature water liquid and steam for cleaning assembly in cleaning equipment, and heating device includes shell and heating element, shell has cavity, and heating element is arranged in cavity with multiple segments bending.This utility model, heating element is arranged in cavity with multiple segments bending, can substantially extend the extension length of heating element in cavity without increasing the overall volume of heating device, without additionally promoting the power of heating element, to increase its contact with water liquid and the heat exchange area of medium, while breaking the one-way flow trend of medium, prompting it to form turbulence or circular flow, make medium and heating element contact more fully uniform, not only significantly speed up medium temperature rising speed, effectively shorten the waiting time of cleaning equipment initial high-temperature water liquid or steam, but also can reduce water drop in steam, improve cleaning effect.

Description

Technical Field

[0001] This utility model relates to the field of cleaning equipment technology, specifically to a heating device and cleaning equipment. Background Technology

[0002] In existing technologies, heating devices are used to supply high-temperature water and steam to cleaning equipment during the cleaning process to enhance the cleaning effect. However, due to the size and weight limitations of the cleaning equipment itself, the installation space for heating devices is limited. This means that the heating elements in the heating device that come into contact with water need to be designed to be relatively small, often requiring an increase in power to improve heating efficiency. However, due to safety considerations and the power supply capacity of the cleaning equipment, the potential for increasing the power of the heating elements is also limited.

[0003] This results in a longer waiting time for the cleaning equipment to initially produce high-temperature water or steam. Especially in steam mode, insufficient heating efficiency can lead to a high water droplet content in the steam, negatively impacting the cleaning effect. Utility Model Content

[0004] In order to solve the above-mentioned technical problems, the main purpose of this utility model is to provide a heating device and cleaning equipment that can effectively improve heating efficiency, reduce water droplets in steam, and improve cleaning efficiency.

[0005] To achieve the above objectives, this utility model provides a heating device for cleaning equipment, the heating device comprising:

[0006] A housing having a cavity, the housing having an inlet and an outlet communicating with the cavity and the outside of the housing, the inlet communicating with the liquid storage tank, and the outlet communicating with the cleaning assembly for supplying heated water and / or steam; and,

[0007] A heating element is at least partially disposed within the cavity, the heating element being arranged in multiple bends within the cavity, and the heating element being configured to be at least partially lower than the lowest point of the outlet and at least partially higher than the lowest point of the outlet.

[0008] Optionally, the inlet and the outlet are distributed sequentially along a first direction, and the heating element includes a plurality of pipe segments extending between the inlet and the outlet. The plurality of pipe segments are connected sequentially in the first direction, and the two connected pipe segments are arranged intersectingly, wherein the first direction is parallel to the horizontal direction.

[0009] Optionally, the included angle between any two connected pipe segments is greater than 90 degrees.

[0010] Optionally, the heating element has a first end side and a second end side disposed opposite to each other in a first direction, the first end side being relatively close to the inlet and the second end side being relatively close to the outlet, the second end side being higher than the highest point of the outlet and defining a flow guide gap between it and the inner wall of the housing.

[0011] Optionally, the heating element includes a sleeve extending in a U-shape and a heating wire passing through the sleeve. The sleeve has an opening at the first end and is fixed to the housing, and a bend is formed at the second end. The bend is spaced apart from the housing to form the flow guide gap.

[0012] Optionally, the housing includes a first end wall and a second end wall spaced apart in a first direction, the inlet is opened in the first end wall, the outlet is opened in the second end wall, the sleeve is inserted and fixed to the first end wall and extends to the outside of the housing, and the sleeve forms a port on the outside of the housing for the heating wire to be led out.

[0013] Optionally, at least a portion of the pipe section extends from bottom to top along a first direction, with the lower end of the heating element below the lowest point of the outlet and the upper end of the heating element above the highest point of the outlet.

[0014] Optionally, in a plurality of the pipe sections, at least a portion of the pipe sections are provided with a water-absorbing layer on their outer periphery, the lower end of the water-absorbing layer being lower than the lowest point of the outlet, and the upper end of the water-absorbing layer being higher than the lowest point of the outlet.

[0015] Optionally, the plurality of pipe segments include a first pipe segment, a second pipe segment, and a third pipe segment connected sequentially along a first direction, wherein the first pipe segment is lower than the lowest point of the outlet, the third pipe segment is higher than the highest point of the outlet, and the second pipe segment extends upwardly from the first pipe segment toward the third pipe segment.

[0016] Optionally, the third pipe section is spaced apart from the inner wall of the casing to form a flow guiding gap; and / or,

[0017] The angle between the first pipe segment and the second pipe segment is greater than or equal to 100 degrees and less than or equal to 140 degrees; and / or,

[0018] The angle between the second pipe segment and the third pipe segment is greater than or equal to 100 degrees and less than or equal to 140 degrees.

[0019] Optionally, there is a gap between the upper end of the heating element and the inner wall of the housing, wherein the minimum size L1 of the gap is greater than or equal to 4 mm and less than or equal to 10 mm;

[0020] The vertical dimension between the upper end of the heating element and the lowest point of the outlet is L2, where L2 is greater than or equal to and less than or equal to 1.

[0021] Optionally, the heating device includes:

[0022] A housing having a cavity, the housing having an inlet and an outlet communicating with the cavity and the outside of the housing; and,

[0023] A heating element, at least partially extending upward in a direction from the inlet to the outlet, extends continuously in a bent manner within the cavity; and,

[0024] A water-absorbing layer is disposed on the outer surface of the heating element, with the lower end of the water-absorbing layer being lower than the lowest point of the outlet and the upper end of the water-absorbing layer being higher than the lowest point of the outlet.

[0025] Optionally, the heating element includes a first pipe segment, a second pipe segment, and a third pipe segment connected in sequence. The first pipe segment is lower than the lowest point of the outlet, the third pipe segment is higher than the highest point of the outlet, and the second pipe segment extends upward from the first pipe segment toward the third pipe segment. The water-absorbing layer at least partially wraps around the first pipe segment and / or the second pipe segment.

[0026] Optionally, the absorbent layer includes at least one of carbon fiber cotton, alumina fiber-based composite felt, mullite fiber composite cloth, silica sol composite cloth, and alumina coated felt.

[0027] To achieve the above objectives, this utility model provides a cleaning device, comprising:

[0028] Organism;

[0029] A liquid storage tank and a cleaning assembly are disposed within the body of the machine; and,

[0030] A heating device, wherein the heating device is as described above.

[0031] This invention provides a heating device and a cleaning device incorporating the same. The heating device provides high-temperature water and steam to the cleaning components within the cleaning device. The heating device includes a housing and a heating element. The housing has a cavity, and the heating element is arranged in multiple bends within the cavity. In the embodiments provided by this invention, the heating element's multi-bend arrangement within the cavity significantly extends its length within the cavity without increasing the overall volume of the heating device or the power of the heating element. This increases the heat exchange area between the heating element and media such as water, water vapor, and steam. Simultaneously, it breaks the unidirectional flow trend of the media, causing turbulence or circulation as the media flows towards the outlet. This results in more thorough and uniform contact between the media and the heating element, significantly accelerating the heating rate of the media, effectively shortening the initial waiting time for the cleaning device to produce high-temperature water or steam, and reducing water droplets in the steam, thus improving the cleaning effect. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0033] Figure 1 A cross-sectional view in the width direction of an embodiment of the heating device provided by this utility model;

[0034] Figure 2 for Figure 1 A cross-sectional view of the heating device along its length;

[0035] Figure 3 for Figure 1 A three-dimensional structural diagram of the heating element;

[0036] Figure 4 for Figure 3 A schematic diagram of the heating element, in which the sleeve is shown to be transparent;

[0037] Figure 5 A perspective structural diagram of another embodiment of the heating device provided by this utility model;

[0038] Figure 6 for Figure 5 A cross-sectional view of the heating device along the vertical direction;

[0039] Figure 7 for Figure 5 A cross-sectional view of the heating device along its length.

[0040] Explanation of icon numbers:

[0041] 100-Heating device; 10-Housing; 110-Cavity; 111-Inlet; 112-Outlet; 12-First end wall; 13-Second end wall; 14-Top wall; 15-Bottom wall; 20-Heating element; 21-Pipe section; 211-First pipe section; 212-Second pipe section; 213-Third pipe section; 22-Shell; 221-First port; 222-Second port; 223-First end side; 224-Second end side; 225-Opening; 226-Bend; 23-Heating wire; 24-Wire; 30-Water-absorbing layer; 40-Flow guide gap; 50-Conduit; 60-Temperature sensor.

[0042] The realization of the purpose, functional characteristics and excellent effects of this utility model will be further explained below in conjunction with specific embodiments and accompanying drawings. Detailed Implementation

[0043] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0044] It should be noted that if the embodiments of this utility model involve directional indication, the directional indication is only used to explain the relative positional relationship and movement of each component in a specific posture. If the specific posture changes, the directional indication will also change accordingly.

[0045] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0046] This utility model provides a cleaning device, which includes a body, a liquid storage tank, cleaning components, and a heating device 100. The cleaning components include, but are not limited to, cleaning parts that directly contact the surface to be cleaned (e.g., roller brushes, mops, etc.), a water distributor or nozzle that sprays water onto the cleaning parts and / or the surface to be cleaned, and a steam plate that sprays steam onto the surface to be cleaned. The liquid storage tank is connected to the cleaning components via a pipeline, on which the heating device 100 is installed. The function of the heating device 100 is to heat the water supplied by the liquid storage tank and output the heated water and / or steam to the cleaning components according to actual cleaning needs, thereby achieving high-temperature water cleaning and / or steam cleaning using the cleaning device. It is understood that, generally speaking, the cleaning device also includes a power component such as a pump to drive the water to flow along the pipeline, so that the water in the liquid storage tank is drawn to the heating device 100 and flows towards the cleaning components.

[0047] Please see Figures 1 to 5 This utility model provides a heating device 100 for use in the aforementioned cleaning equipment. The heating device 100 includes a housing 10 and a heating element 20. The housing 10 is preferably made of a high-temperature resistant material and has a cavity 110 formed therein. The volume of the cavity 110 is designed according to the cleaning liquid supply requirements of the cleaning equipment to accommodate at least a portion of the heating element 20. The housing 10 has an inlet 111 and an outlet 112 that connect the cavity 110 and the outside of the housing 10. The inlet 111 connects to the liquid storage tank of the cleaning equipment to input water from the liquid storage tank into the cavity 110, and the outlet 112 connects to the cleaning assembly to input heated water and / or steam from the cavity 110 into the cleaning assembly.

[0048] It should be noted that, in this embodiment, the first direction refers to a predetermined extension direction from the inlet 111 towards the outlet 112, parallel to the horizontal direction. During operation, the heating element 20 can come into contact with fluids such as low-temperature water, water vapor, and / or steam according to heating requirements to prepare high-temperature water or steam. In the following text, the fluids such as water, water vapor, and / or steam that are in direct contact with the heating element 20 are collectively referred to as the medium. The lowest point of the outlet 112 refers to the lowest edge of the outlet 112 in the vertical direction, and the highest point of the outlet 112 refers to the highest edge of the outlet 112 in the vertical direction. The descriptions of the lowest and highest points of the inlet 111 are similar.

[0049] The specific form of the heating element 20 is not limited; for example, it can be an electric heating tube. Its function is to convert electrical energy into heat energy, thereby raising the surface temperature of the heating element 20. The medium, such as water or steam, inside the cavity 110 comes into contact with the surface of the heating element 20, resulting in heat exchange and a rapid rise in the medium temperature to form high-temperature water and / or steam as needed. The heating element 20 is positioned at least partially below and at least partially above the lowest point of the outlet 112.

[0050] In this embodiment, when the heating device 100 is working, it has at least two working water levels depending on the heating mode: a first working water level and a second working water level. Specifically, when the cleaning equipment is performing high-temperature water cleaning, the heating device 100 is in the first heating mode, supplying high-temperature water to the cleaning components. At this time, the water level in the cavity 110 can be adjusted to the first working water level by adjusting the power of the pump body. The heating element 20 is fully or mostly immersed in the water. The water in the cavity 110 is heated to a preset temperature as needed, thereby forming high-temperature water that flows out from the outlet 112 and is delivered to the cleaning components.

[0051] When the cleaning equipment is performing steam cleaning, the heating device 100 is in a second heating mode that supplies steam to the cleaning components. At this time, the water level in the chamber 110 can be adjusted to the second working water level by regulating the power of the pump. Figure 1 The dashed line indicates the ideal second working water level of the heating device 100 in the second heating mode provided in this embodiment. It is understood that in actual operation, the second water level may fluctuate due to the movement of the cleaning equipment, and the actual second working water level may be slightly higher or lower than the outlet 112, provided that steam can flow smoothly out. Figure 1 The water level is shown in the diagram. Furthermore, the second working water level should be lower than the first working water level and should not be higher than the highest point of outlet 112. The second working water level should also not be too close to the highest point of outlet 112, as this could result in insufficient steam flow area, or even hot water splashing out of outlet 112 and flowing with the steam towards the cleaning components.

[0052] In an optional embodiment, the heating device 100 can be tilted as a whole. For example... Figure 1 As shown, when the housing 10 is elongated, the inlet 111 and outlet 112 can be located at both ends of the housing 10 along its length. Preferably, the angle R between the length direction of the housing 10 and the first direction is approximately 30 degrees. This positions the outlet 112 relatively high relative to the cavity 110, preventing water from splashing out of the outlet 112. In a preferred embodiment, as... Figure 5 As shown, a conduit 50 is connected to the outside of the housing 10. The conduit 50 connects to the outlet 112 and extends upwards in a direction away from the housing 10. In this way, the conduit 50, by bending upwards, prevents the water in the cavity 110 from flowing to the cleaning components with the steam, thereby improving the purity of the steam, reducing the water stains left on the surface to be cleaned during steam cleaning, and improving the cleaning effect.

[0053] When the heating device 100 is in the second heating mode, the heating element 20 is partially immersed in the water. The lower part of the element forms a first heating zone below the second working water level, while the upper part of the element forms a second heating zone above the second working water level. When the heating element 20 is working, the temperature of the second heating zone is significantly higher than that of the first heating zone. The water in the cavity 110 is heated by the first heating zone to form water vapor mixed with a large number of water droplets. After rising, the water vapor is further heated by the second heating zone to form high-temperature steam, which is then output from the outlet 112.

[0054] In this embodiment, the heating element 20 is arranged in multiple bends within the cavity 110. This arrangement increases the extension length of the heating element 20 within the cavity 110, expanding the heat exchange surface between the heating element 20 and the medium. Without increasing the overall volume of the heating device 100 or the power of the heating element 20, the heating efficiency of the heating device 100 can be significantly improved, and the heating rate of the medium can be significantly increased. This allows the cleaning equipment to output high-temperature water and / or steam for cleaning more quickly, reducing user waiting time. Furthermore, in steam cleaning mode, it can effectively reduce water droplets in the steam, preventing water stains from being left on the surface to be cleaned, thus improving the user experience. On the other hand, the multi-bend heating element 20, combined with the pressure difference at various points within the cavity 110, causes the medium to form more complex turbulence and circulation within the cavity 110, breaking the single flow direction of the medium from the inlet 111 to the outlet 112. This increases the contact time between the medium and the heating element 20, resulting in a more uniform temperature distribution within the cavity 110. At this time, the temperature of the high-temperature water and steam discharged from the heating device 100 to the output component is more stable, further improving the cleaning effect.

[0055] Based on the previous embodiment, it can be understood that there is a gap between the upper end of the heating element 20 and the inner wall of the housing 10. It should be noted that the inner wall is part of the housing 10 facing the cavity 110, including the inner side of the top wall 14 of the housing 10, the inner sides of the end walls at both ends in the first direction, and the inner side of the peripheral wall surrounding the first direction. This gap is also the space between the second heating zone of the heating element 20 and the inner wall of the housing 10 in the second heating mode, allowing for the flow of the medium. It can be understood that if this gap is set too small, it can easily lead to excessively high temperatures in the housing 10, resulting in unnecessary heat loss and adversely affecting the durability of the heating device 100. Conversely, if the gap is set too large, it leads to an unnecessary increase in the volume of the housing 10, making the overall structure of the heating device 100 less compact.

[0056] In addition, such as Figure 1 and Figure 5As shown, a temperature sensor 60 is typically installed on the outer side of the housing 10 to monitor the operating status of the heating device 100. Generally, the minimum size L1 of this gap is the minimum distance between the inner wall of the housing 10 where the heating device 100 is installed and the outer surface of the heating element 20. If this gap is set too large, the temperature sensor 60 will not detect the results accurately. Therefore, in this embodiment, the minimum size of this gap is preferably greater than or equal to 4 mm and less than or equal to 10 mm, so as to ensure that the outer temperature of the housing 10 is not too high while ensuring that the size of the housing 10 is small enough, and that the temperature sensor 60 detects the temperature accurately.

[0057] Optionally, the vertical distance between the upper end of the heating element 20 and the lowest point of the outlet 112 is L2, which is greater than or equal to 7 mm and less than or equal to 20 mm. This dimension L2 reflects the maximum distance between the second working area of ​​the heating element 20 and the second working water level in the second heating mode (i.e., the mode in which the heating device 100 supplies steam to the output component). If this distance is set too small, the heat exchange area between the heating element 20 and the water vapor may be insufficient, preventing sufficient heat exchange to form high-temperature steam. Conversely, if the distance is set too large, some water vapor may not be able to fully contact the upper part of the second working area, resulting in the heating element 20 not being fully utilized. In this case, the upper part of the second working area may also experience excessively high temperatures due to insufficient heat exchange with the medium, posing a safety hazard. Therefore, in this embodiment, by limiting the dimension of L2, the steam output effect is guaranteed, ensuring that all parts of the second working area can fully contact the water vapor, avoiding localized overheating.

[0058] In an alternative embodiment, such as Figure 1 As shown, inlet 111 and outlet 112 are sequentially distributed along a first direction. The heating element 20 includes multiple pipe segments 21 extending between inlet 111 and outlet 112. These pipe segments 21 are sequentially connected along the first direction, and each pair of connected pipe segments 21 is arranged intersectingly. That is, the axes of adjacent pipe segments 21 are not parallel and have intersection points or intersection points of their extensions, rather than extending in a straight line in the same direction. This design allows the heating element 20 to be bent within the limited space of the cavity 110, maximizing the heat exchange area between the heating element 20 and the medium. Furthermore, it allows for adaptation to the distribution requirements of the first and second heating zones of the heating element 20.

[0059] Please continue reading. Figure 1In this embodiment, the inlet 111 and outlet 112 are distributed along a first horizontal direction, in conjunction with a structure of multiple intersecting pipe segments 21. After the medium enters the cavity 110 from the inlet 111, it can flow along the extension path of the multiple pipe segments 21, increasing the contact time between the medium and the heating element 20 within the cavity 110. Furthermore, the multiple intersecting pipe segments 21 can break the unidirectional flow trend of the medium from the inlet 111 to the outlet 112, promoting the formation of local turbulence or circulation within the cavity 110, preventing some medium from failing to be heated and avoiding situations where the local medium temperature within the cavity 110 is too low. Thus, the medium temperature distribution within the cavity 110 is uniform, effectively improving the temperature stability of the high-temperature water or steam output by the heating device 100. Compared to the traditional linear heating element 20, this embodiment significantly improves heat exchange efficiency and shortens heating waiting time without increasing the overall volume of the heating device 100. It also addresses the technical issue of slow initial output of high-temperature water or steam when the cleaning equipment enters the high-temperature water or steam cleaning mode, requiring the user to wait. Furthermore, the high-temperature water or steam output by the heating device 100 exhibits higher temperature stability, effectively ensuring the cleaning effect.

[0060] Furthermore, such as Figure 1 As shown, the included angle between any two connected pipe segments 21 is greater than 90 degrees. The included angle refers to the angle formed by the axes of adjacent pipe segments 21. A maximum included angle of 90 degrees means that adjacent pipe segments 21 intersect at an obtuse angle. This ensures that each pipe segment 21 has sufficient extension space within the cavity 110, preventing them from becoming too densely packed due to small angles, which could affect water flow and heat exchange, and also prevent localized overheating. Furthermore, the heating element 20 is easier to manufacture; for example, the heating wire 23 will not be excessively bent within the sleeve 22, thus preventing damage.

[0061] Preferably, such as Figure 1 As shown, the heating element 20 has a first end side 223 and a second end side 224 disposed opposite to each other in a first direction. The first end side 223 is relatively close to the inlet 111, and the second end side 224 is relatively close to the outlet 112. The second end side 224 is higher than the highest point of the outlet 112 on the housing 10. A flow guiding gap 40 is defined between the second end side 224 and the inner wall of the housing 10. Specifically, the flow guiding gap 40 is the gap between the second end side 224 of the heating element 20 and the inner wall of the housing 10. This flow guiding gap 40 provides a channel for additional flow of various media. Here, the medium such as high-temperature liquid water or water vapor can generate circulation and turbulence around the second end side 224 near the outlet 112, thereby improving the uniformity of the temperature distribution of the medium in the cavity 110 and prolonging the heat exchange time between the medium and the heating element 20. In practical applications, the specific height of the second end side 224 above the outlet 112 and the size of the guide gap 40 can be selected and adjusted comprehensively according to factors such as steam generation requirements and the size of the cavity 110, as long as the guiding function can be achieved.

[0062] Specifically, when the heating device 100 is in the first heating mode, water and other liquids flow around the second end side 224, forming circulation and turbulence, effectively enhancing the overall medium convection within the cavity 110. This causes high-temperature water to flow towards the outlet 112, while low-temperature water is carried to the vicinity of the second end side 224, efficiently transferring heat from the heating element 20 to the water and reducing the likelihood of low-temperature water flowing directly out of the outlet 112. When the heating device 100 is in the second heating mode, the second end side 224 constitutes at least part of the second heating zone of the heating element 20. The water vapor formed by the first heating zone is reheated in this second heating zone to form high-temperature steam that flows towards the outlet 112. At this time, the guide gap 40 causes water vapor to flow around the second end side 224, forming circulation and turbulence, fully contacting the second end side 224 for heat exchange, raising the steam and reducing water droplets in the steam.

[0063] Based on the previous embodiment, please continue to refer to... Figures 2 to 4 The heating element 20 includes a U-shaped sleeve 22 and a heating wire 23 passing through the sleeve 22. The sleeve 22 is a protective component enclosing the heating wire 23, isolating it from the water and uniformly transferring heat from the wire 23 to the medium. In practical applications, the sleeve 22 can be made of materials with good thermal conductivity, such as stainless steel or copper alloy. The heating wire 23 is the heat-generating component, capable of generating heat through electrical current. The sleeve 22 has an opening 225 at its first end 223 and is fixed to the housing 10. A bend 226 is formed at the second end 224 of the sleeve 22. This bend 226 is the arc-shaped portion of the U-shaped structure of the sleeve 22 located at the second end 224. The bend 226 is spaced apart from the housing 10 to form a flow-guiding gap 40. Preferably, the bend 226 extends in an arc shape. That is, the axis of the bend 226 is a smooth curve, rather than a broken line or an angular shape. Compared to the zigzag-shaped bend 226, the bend 226 with a smooth arc surface can reduce the resistance to medium flow and promote the generation of medium circulation.

[0064] In this embodiment, the design of the U-shaped sleeve 22 not only extends the length of the heating wire 23 within the compact cavity 110, improving heating efficiency and shortening heating time, but also utilizes its bend 226 to form an obstacle intersecting with the direction of medium flow. This causes the medium to generate a circulating and turbulent flow around the sleeve 22 under the guidance of the bend 226 before flowing towards the outlet 112, thereby further enhancing the medium convection within the cavity 110 and improving the uniformity of temperature distribution and heating speed within the cavity 110.

[0065] like Figure 4As shown, the heating element 20 also includes a wire 24 electrically connected to the heating wire 23. In an optional embodiment, the sleeve 22 has a first port 221 and a second port 222 arranged opposite to each other in its length direction. The heating wire 23 passes through the sleeve 22. The wire 24 is connected to one end of the heating wire 23 and extends out from the first port 221, and the wire 24 is connected to the other end of the heating wire 23 and extends out from the second port 222. It should be noted that in this embodiment, the length direction of the sleeve 22 refers to the overall extension direction of the sleeve 22. Its first port 221 and second port 222 serve as the lead-out ends of the wire 24, and it is necessary to ensure that the wire 24 can smoothly pass through the housing 10 and connect to the external power supply system. In this embodiment, the design of the heating wire 23 being connected to the wire 24 from one end of the sleeve 22 and exiting from the other end of the sleeve 22, compared with the prior art design where the heating wire 23 is connected and exited from the same end of the sleeve 22, can increase the area of ​​the sleeve 22 corresponding to a unit length of heating wire 23 where heat exchange occurs with the medium. While improving the heating efficiency of the heating element 20, there is no need to increase the power of the heating element 20. In other words, the U-shaped sleeve 22 effectively extends the length of the heating wire 23 within the compact cavity 110 space, increases the heat exchange area, and shortens the heating time.

[0066] Preferably, the heating wire 23 is arranged in a helical shape within the sleeve 22, rotating around a tube axis that extends along the length of the sleeve 22. In this embodiment, the tube axis refers to the central axis of the sleeve 22, and its direction changes with the extension shape of the sleeve 22. The helical arrangement means that the heating wire 23 forms a structure similar to a helical spring around the tube axis. This design can extend the actual length of the heating wire 23 within the limited internal space of the sleeve 22, while ensuring that the heating wire 23 is evenly distributed, thus ensuring a uniform temperature on the outer surface of the sleeve 22.

[0067] Based on the above embodiments, such as Figure 1 and Figure 6 As shown, the housing 10 includes a first end wall 12 and a second end wall 13 spaced apart in a first direction. An inlet 111 is formed on the first end wall 12, and an outlet 112 is formed on the second end wall 13. A sleeve 22 is inserted and fixed to the first end wall 12 and extends to the outside of the housing 10. The sleeve 22 has a port on the outside of the housing 10 for the heating wire 23 to be led out. The sleeve 22 being inserted and fixed to the first end wall 12 means that it can be fixed by interlocking with a pre-set mounting hole on the first end wall 12. For example, it can be fixed by screwing, welding, or interference fit. To ensure the sealing of the cavity 110, a high-temperature resistant seal can be provided at the mating point between the sleeve 22 and the mounting hole. In practical applications, the length of the sleeve 22 extending outside the housing 10 should be sufficient to facilitate the connection of the heating wire 23 to the wire 24; it should not be too long to avoid occupying extra space inside the cleaning equipment.

[0068] In this embodiment, the wires 24 at both ends of the heating wire 23 also extend outward from the first end wall 12 for easy connection and assembly with an external power system. The sleeve 22 is inserted and fixed to the first end wall 12 and extends to the outside, so that the port of the lead-out sleeve 22 of the heating wire 23 is separated from the water environment in the cavity 110, thus avoiding the risk of leakage caused by water contact with the connection between the heating wire 23 and the wires 24. At the same time, the external port also provides convenience for checking the continuity of the heating wire 23 during later maintenance.

[0069] Based on the above embodiments, preferably, at least a portion of the pipe segment 21 extends upward along the first direction, and the lower end of the heating element 20 is lower than the lowest point of the outlet 112, while the upper end of the heating element 20 is higher than the highest point of the outlet 112. In this embodiment, some or all of the pipe segments 21 are gradually raised from the inlet 111 towards the outlet 112. Thus, the extension shape of the pipe segment 21 itself forms the first heating zone and the second heating zone where the heating element 20 is distributed on both sides above and below the second working water level, resulting in a simple and easy-to-implement structure. Furthermore, the design of the upper and lower ends of the heating element 20 extending beyond the upper and lower edges of the outlet 112 ensures that, in the second heating mode, the second heating zone of the heating element 20 is sufficiently higher than the second working water level, increasing the heat exchange area for secondary heating of the water vapor. The upward-extending pipe segment 21 is adapted to the medium flow direction, which is beneficial for promoting medium circulation and making the temperature distribution within the cavity 110 more uniform.

[0070] Furthermore, such as Figure 1 As shown, the upper end of the heating element 20 is higher than the highest point of the inlet 111, meaning that the upper region of the heating element 20 is not only higher than the outlet 112 but also higher than the inlet 111. With this configuration, when the heating device 100 is in the first heating mode, because there is still space above the outlet 112 within the cavity 110 to accommodate the heating element 20, an air bubble area is formed above the outlet 112 in the cavity 110. Thus, during the process of discharging high-temperature water, the water in the cavity 110 does not need to completely fill the cavity 110; the volume of water to be heated is smaller than the volume of the cavity 110, resulting in a faster discharging speed during the initial stage of discharging high-temperature water from the cleaning equipment. On the other hand, as water vapor and liquid flow around the heating element 20 in the bubble zone to form circulation and turbulence, the bubble zone forms a high-pressure environment, which can effectively enhance the overall medium convection in the cavity 110, causing the high-temperature liquid to flow to the outlet 112 and the low-temperature liquid to be brought to the vicinity of the heating element 20, so as to efficiently transfer the heat of the heating element 20 to the medium and reduce the situation where the low-temperature liquid flows out directly from the outlet 112.

[0071] Preferably, such as Figure 1 and Figure 3As shown, at least a portion of the pipe sections 21 are provided with a water-absorbing layer 30 on their outer periphery. The lower end of the water-absorbing layer 30 is lower than the lowest point of the outlet 112, and the upper end of the water-absorbing layer 30 is higher than the lowest point of the outlet 112. That is, the water-absorbing layer 30 extends at least from the first heating zone of the heating element 20 to the second heating zone, that is, from below the second working water level to above the second working water level. The water-absorbing layer 30 can completely or partially wrap around the corresponding pipe section 21 according to its shape, and the thickness of the water-absorbing layer 30 can also be adjusted according to the water absorption requirements to ensure that it can absorb a sufficient amount of water without affecting the flow of water in the cavity 110.

[0072] It should be noted that the absorbent layer 30 refers to a material layer with water absorption and retention properties that wraps around the outer periphery of the pipe section 21. Its function is to absorb water below the second working water level, causing the water to form a water film within the absorbent layer 30 and rise above the second working water level, increasing the contact area between the water and the pipe section 21. This is beneficial for increasing steam production and improving steam output efficiency in the second heating mode of the heating device 100. Preferably, the absorbent layer 30 includes at least one of carbon fiber cotton, alumina fiber-based composite felt, mullite fiber composite cloth, silica sol composite cloth, and alumina coated felt. That is, the absorbent layer 30 can be made of materials that are heat-resistant, porous, and have stable water absorption properties.

[0073] Specifically, in the second heating mode with steam output, the water level in the cavity 110 is at the second working water level. The lower end of the water-absorbing layer 30 is immersed in the water, adsorbing the water and conducting it upwards to the upper end of the water-absorbing layer 30 (the part above the second working water level). The heat generated by the heating element 20 causes the water in the water-absorbing layer 30 to evaporate, forming water vapor. The water vapor is further heated by the second heating zone above the heating element 20 to form steam, which is output from the outlet 112. In this embodiment, the water-absorbing layer 30 allows the water to contact the pipe section 21 in the form of a water film, compared to the water directly contacting the surface of the pipe section 21. The water film has a larger water storage capacity and more uniform heating, which can significantly improve the heat exchange efficiency. At the same time, the water-absorbing layer 30 can store a certain amount of water. In the second heating mode, even if the water level in the cavity 110 is temporarily insufficient to generate water vapor, the water adsorbed by the water-absorbing layer 30 can continuously provide water vapor raw materials for steam generation, avoiding interruption of steam output and preventing the local temperature of the heating element 20 from becoming too high.

[0074] Preferably, the height difference between the upper end of the absorbent layer 30 and the lowest point of the outlet 112 (preferably the second working water level) is greater than or equal to 5 mm and less than or equal to 10 mm. It is understood that this height difference needs to ensure that the upper end of the absorbent layer 30 is within the effective heating area of ​​the heating element 20, while avoiding excessive height that would prevent the water from reaching the uppermost end of the absorbent layer 30 due to long-distance transportation.

[0075] The specific number and shape of the multiple pipe segments 21 are not limited. In this embodiment, for example... Figure 1 and Figure 4 As shown, the multiple pipe segments 21 include a first pipe segment 211, a second pipe segment 212, and a third pipe segment 213 connected sequentially along a first direction. The first pipe segment 211 is below the lowest point of the outlet 112 and forms a first heating zone, while the third pipe segment 213 is above the highest point of the outlet 112 and forms a second heating zone. The second pipe segment 212 extends upwards at an angle from the first pipe segment 211 toward the third pipe segment 213. In this embodiment, the first pipe segment 211, the second pipe segment 212, and the third pipe segment 213 are three pipe segments 21 connected sequentially to the heating element 20. The first pipe segment 211 is relatively closer to the inlet 111, and the third pipe segment 213 is relatively closer to the outlet 112. The three pipe segments 21 together constitute the main extension structure of the heating element 20. That is, in this embodiment, the first pipe segment 211 forms the first heating zone, the third pipe segment 213 forms the second heating zone, and the second pipe segment 212 extends at an angle to pass through the second working water level and connect the two. Thus, through a simple three-section structure, the heating element 20 is configured into multiple sections to meet the working requirements of different heating modes. Preferably, the first tube section 211 and the third tube section 213 are both configured to be parallel to the top wall 14 and bottom wall 15 of the housing 10, thereby maximizing the heat exchange area between the first heating zone and the medium within the limited space of the cavity 110 and improving the heat exchange efficiency.

[0076] Optionally, the third pipe section 213 is spaced apart from the inner wall of the housing 10 to form a flow guiding gap 40. The function of the flow guiding gap 40 has been described in the embodiments above and will not be repeated here.

[0077] Optionally, the included angles between the first pipe segment 211 and the second pipe segment 212, and between the second pipe segment 212 and the third pipe segment 213, are both greater than or equal to 100 degrees and less than or equal to 140 degrees. The included angle between different pipe segments 21 refers to the angle formed in space by the axes of two adjacent pipe segments 21, limited to the range of 100 degrees to 140 degrees. This angle range avoids both excessive bending of the pipe segment 21 due to an excessively small angle, which would increase the resistance to water flow, and excessively large angles, which would restrict the dimensions of the first pipe segment 211 and the third pipe segment 213 in the first direction, resulting in insufficient heat exchange area between the first heating zone and the second heating zone. The included angles of the pipe segments 21 can be adapted to the size of the cavity 110 itself within the range of 100 to 140 degrees. For example, a larger included angle can be selected when the height of the cavity 110 is small, and a smaller included angle can be selected when the height of the cavity 110 is large, both of which can meet the requirements of the technical solution.

[0078] This utility model also provides a heating device 100 for cleaning equipment, which includes a housing 10, a heating element 20, and a water-absorbing layer 30. The housing 10 has a cavity 110 and an inlet 111 and an outlet 112 communicating between the cavity 110 and the outside of the housing 10. The inlet 111 is used to connect to the liquid storage tank of the cleaning equipment to input water, and the outlet 112 is used to output heated water or steam to the cleaning equipment. The heating element 20 extends upward at least partially from the inlet 111 to the outlet 112 and extends continuously in a bent manner within the cavity 110. The water-absorbing layer 30 is disposed on the outer surface of the heating element 20, with its lower end lower than the lowest point of the outlet 112 and its upper end higher than the lowest point of the outlet 112.

[0079] In this embodiment, the heating element 20 is arranged in multiple bends within the cavity 110. On one hand, by increasing the heat exchange surface between the heating element 20 and the medium within the cavity 110, the heating efficiency of the heating device 100 can be significantly improved without increasing the overall volume of the heating device 100 or the power of the heating element 20. This significantly increases the heating rate of the medium, allowing the cleaning equipment to output high-temperature water and / or steam for cleaning more quickly, reducing waiting time. Furthermore, in steam cleaning mode, it effectively reduces water droplets in the steam, preventing water stains from being left on the surface to be cleaned, thus improving the user experience. On the other hand, the multi-bend heating element 20, combined with the pressure difference at various points within the cavity 110, causes the medium to form more complex turbulence and circulation within the cavity 110, breaking the single flow direction of the medium from the inlet 111 to the outlet 112. This increases the contact time between the medium and the heating element 20, resulting in a more uniform temperature distribution within the cavity 110. At this time, the temperature of the high-temperature water and steam discharged from the heating device 100 to the output component is more stable, further improving the cleaning effect.

[0080] The absorbent layer 30 refers to a high-temperature resistant material layer covering the outer periphery of the heating element 20, possessing adsorption and water retention capabilities. Its function is to adsorb water below the second working water level in the second heating mode of the heating device 100, causing the water to form a water film within the absorbent layer 30 and rise above the second working water level. This increases the contact area between the water and the heating element 20, which is beneficial for increasing steam production and improving steam output efficiency. Preferably, the absorbent layer 30 includes at least one of carbon fiber cotton, alumina fiber-based composite felt, mullite fiber composite cloth, silica sol composite cloth, and alumina-coated felt. In other words, the absorbent layer 30 can be made of materials with high temperature resistance, porosity, and stable water absorption performance.

[0081] Specifically, in the second heating mode with steam output, the water level in the cavity 110 is at the second working water level. The lower end of the water-absorbing layer 30 is immersed in the water, adsorbing the water and conducting it upwards to the upper end of the water-absorbing layer 30 (the part above the second working water level). The heat generated by the heating element 20 causes the water in the water-absorbing layer 30 to evaporate, forming water vapor. The water vapor is further heated by the second heating zone above the heating element 20 to form steam, which is output from the outlet 112. In this embodiment, the water-absorbing layer 30 allows the water to contact the heating element 20 in the form of a water film, compared to the water directly contacting the surface of the heating element 20. The water film has a larger water storage capacity and more uniform heating, which can significantly improve the heat exchange efficiency. At the same time, the water-absorbing layer 30 can store a certain amount of water. In the second heating mode, even if the water level in the cavity 110 is temporarily insufficient to generate water vapor, the water adsorbed by the water-absorbing layer 30 can continuously provide water vapor raw materials for steam generation, avoiding interruption of steam output and preventing the local temperature of the heating element 20 from becoming too high.

[0082] Furthermore, the heating element 20 includes a first pipe section 211, a second pipe section 212, and a third pipe section 213 connected in sequence. The first pipe section 211 is lower than the lowest point of the outlet 112, the third pipe section 213 is higher than the highest point of the outlet 112, and the second pipe section 212 extends upward from the first pipe section 211 toward the third pipe section 213. The water-absorbing layer 30 at least partially wraps around the first pipe section 211 and / or the second pipe section 212.

[0083] In this embodiment, the first pipe segment 211, the second pipe segment 212, and the third pipe segment 213 are three pipe segments 21 connected sequentially to the heating element 20. The first pipe segment 211 is relatively close to the inlet 111, and the third pipe segment 213 is relatively close to the outlet 112. These three pipe segments together constitute the main extension structure of the heating element 20. That is, in this embodiment, the first pipe segment 211 constitutes the first heating zone, the third pipe segment 213 constitutes the second heating zone, and the second pipe segment 212 extends obliquely to pass through the second working water level and connect the two. Thus, through a simple three-segment structure, the heating element 20 is configured as multiple segments, meeting the working requirements of different heating modes. Preferably, both the first pipe segment 211 and the third pipe segment 213 are configured parallel to the top wall 14 and bottom wall 15 of the housing 10, thereby maximizing the heat exchange area between the first and second heating zones and the medium within the limited space of the cavity 110, and improving heat exchange efficiency.

[0084] In practical applications, the absorbent layer 30 can either completely wrap around the second pipe segment 212 or simultaneously wrap both the first and second pipe segments 211, as long as the coverage extends to both sides of the second working water level. The length of the wrapping can be adjusted according to the length of each pipe segment 21 and the water absorption requirements, without needing to cover the entire length of each pipe segment 21. The absorbent layer 30 completely wraps around the first pipe segment 211 and / or the second pipe segment 212, maximizing the contact area between the absorbent layer 30 and the first and / or second pipe segments 211 and / or the second pipe segment 212, ensuring that the absorbent layer 30 absorbs water below the second working water level to above the second working water level. Complete wrapping means that the absorbent layer 30 completely wraps around the circumference of the first pipe segment 211 or the second pipe segment 212, rather than only wrapping a portion of the pipe segment 21. This wrapping method ensures that the outer circumference of the pipe segment 21 is in contact with the absorbent layer 30, forming a complete water film and avoiding uneven contact caused by the absence of absorbent layer 30 in certain areas.

[0085] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structure made using the contents of the present utility model specification and drawings, or directly or indirectly applied to other related technical fields, are similarly included within the patent protection scope of the present utility model.

Claims

1. A heating device for cleaning equipment, the cleaning equipment comprising a liquid storage tank and a cleaning assembly, characterized in that, The heating device includes: A housing having a cavity, the housing having an inlet and an outlet communicating with the cavity and the outside of the housing, the inlet communicating with the liquid storage tank, and the outlet communicating with the cleaning assembly for supplying heated water and / or steam; and, A heating element is at least partially disposed within the cavity, the heating element being arranged in multiple bends within the cavity, and the heating element being configured to be at least partially lower than the lowest point of the outlet and at least partially higher than the lowest point of the outlet.

2. The heating device as described in claim 1, characterized in that, The inlet and the outlet are distributed sequentially along a first direction. The heating element includes a plurality of pipe segments extending between the inlet and the outlet. The plurality of pipe segments are connected sequentially in the first direction, and the two connected pipe segments are arranged intersectingly. The first direction is parallel to the horizontal direction.

3. The heating device as described in claim 2, characterized in that, The included angle between any two connected pipe segments is greater than 90 degrees.

4. The heating device as described in claim 2, characterized in that, The heating element has a first end side and a second end side that are arranged opposite to each other in a first direction. The first end side is relatively close to the inlet, and the second end side is relatively close to the outlet. The second end side is higher than the highest point of the outlet and defines a flow guide gap between itself and the inner wall of the housing.

5. The heating device as described in claim 4, characterized in that, The heating element includes a sleeve extending in a U-shape and a heating wire passing through the sleeve. The sleeve has an opening at the first end and is fixed to the housing. A bend is formed at the second end, and the bend is spaced apart from the housing to form the flow guide gap.

6. The heating device of claim 5, wherein The housing includes a first end wall and a second end wall spaced apart in a first direction. The inlet is opened in the first end wall, the outlet is opened in the second end wall, the sleeve is inserted and fixed to the first end wall and extends to the outside of the housing, and the sleeve has a port for the heating wire to be led out on the outside of the housing.

7. The heating device as described in claim 2, characterized in that, At least a portion of the pipe section extends from bottom to top along a first direction, with the lower end of the heating element below the lowest point of the outlet and the upper end of the heating element above the highest point of the outlet.

8. The heating device of claim 7, wherein, In the plurality of pipe sections, at least a portion of the pipe sections are provided with a water-absorbing layer on their outer periphery, the lower end of the water-absorbing layer being lower than the lowest point of the outlet, and the upper end of the water-absorbing layer being higher than the lowest point of the outlet.

9. The heating device of claim 2, wherein, The plurality of pipe segments include a first pipe segment, a second pipe segment, and a third pipe segment connected sequentially along a first direction. The first pipe segment is lower than the lowest point of the outlet, the third pipe segment is higher than the highest point of the outlet, and the second pipe segment extends upwardly from the first pipe segment toward the third pipe segment.

10. The heating device as described in claim 9, characterized in that, The third pipe section is spaced apart from the inner wall of the shell to form a flow guiding gap; and / or, The angle between the first pipe segment and the second pipe segment is greater than or equal to 100 degrees and less than or equal to 140 degrees; and / or, The angle between the second pipe segment and the third pipe segment is greater than or equal to 100 degrees and less than or equal to 140 degrees.

11. The heating device of claim 1, wherein, There is a gap between the upper end of the heating element and the inner wall of the housing, and the minimum size L1 of the gap is greater than or equal to 4 mm and less than or equal to 10 mm. The vertical dimension between the upper end of the heating element and the lowest point of the outlet is L2, which is greater than or equal to 7 mm and less than or equal to 20 mm.

12. A heating device for cleaning equipment, characterized in that The heating device includes: A housing having a cavity, the housing having an inlet and an outlet communicating with the cavity and the outside of the housing; and, A heating element, at least partially extending upward in a direction from the inlet to the outlet, extends continuously in a bent manner within the cavity; and, A water-absorbing layer is disposed on the outer surface of the heating element, with the lower end of the water-absorbing layer being lower than the lowest point of the outlet and the upper end of the water-absorbing layer being higher than the lowest point of the outlet.

13. The heating device of claim 12, wherein, The heating element includes a first pipe section, a second pipe section, and a third pipe section connected in sequence. The first pipe section is lower than the lowest point of the outlet, the third pipe section is higher than the highest point of the outlet, and the second pipe section extends upward from the first pipe section toward the third pipe section. The water-absorbing layer at least partially wraps around the first pipe section and / or the second pipe section.

14. The heating device of claim 12, wherein, The absorbent layer includes at least one of carbon fiber cotton, alumina fiber-based composite felt, mullite fiber composite cloth, silica sol composite cloth, and alumina coated felt.

15. A cleaning apparatus, characterized by include: Organism; A liquid storage tank and a cleaning assembly are disposed within the body of the machine; and, A heating device, wherein the heating device is the heating device as described in any one of claims 1 to 14.

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