Boiler, floor brush, cleaning equipment and control method

Abstract

The invention relates to a boiler, a floor brush, cleaning equipment and a control method. The boiler comprises a shell, a heating piece and a first fin. The shell is provided with a containing cavity, an inlet and an outlet, the heating piece is used for heating the fluid in the accommodating cavity; the first fin is located in the containing cavity and makes contact with the heating part, the inlet and the outlet are located in the two sides of the first fin respectively, and at least part of the heating part is located between the first fin and the second side wall; a first gap for fluid to pass through is formed between the first fin and the top wall of the containing cavity. The gaps between the first fins and the bottom wall, the third side wall and the fourth side wall of the containing cavity are all smaller than or equal to the second gaps, and the second gaps range from 0 mm to 3.0 mm and are smaller than the first gaps. Easily-scaling ions such as calcium and magnesium contained in the steam and the hot water are preferably scaled at the position far away from the outlet, the scaling amount near the outlet is reduced, and the problem of outlet blockage is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of cleaning, in particular to a boiler, a mop, a cleaning device and a control method. BACKGROUND

[0002] With the increasing refinement and diversification of household cleaning needs, more and more cleaning devices with boilers are emerging. The boiler can provide steam or hot water during the cleaning process of the cleaning device to improve the cleaning effect. The boiler generates steam by heating the water inside, providing hot steam for the cleaning process, or directly providing hot water. The water heating process is prone to scale accumulation, which can easily cause the boiler to fail and reduce its service life.

[0003] In related technologies, there are ways to improve scaling by flushing the boiler with high-flow water. Although the impact of water can effectively flush the scale out of the boiler, the scale is prone to deposition, and stubborn or large-scale accumulation cannot be effectively flushed out, and is also easy to flush the scale to the outlet of the boiler, blocking the outlet. Another way is to connect an anti-scaling box to flush the scale into the anti-scaling box. This method cannot prevent the scale from blocking the outlet from the root. Moreover, the anti-scaling box increases the cost and occupies a certain internal space volume of the mop, which is relatively high in cost. SUMMARY

[0004] In view of the above problems, the present application provides a boiler, a mop, a cleaning device and a control method.

[0005] To achieve the above purpose, the present application provides the following technical solutions: The first aspect of the present application provides a boiler, comprising: a housing having a containing cavity, and an inlet and an outlet respectively communicating with the containing cavity, the cavity wall of the containing cavity comprising a first side wall and a second side wall arranged oppositely, a third side wall and a fourth side wall arranged oppositely, and a top wall and a bottom wall arranged oppositely; a heating element for heating the fluid in the containing cavity; a first fin located in the containing cavity and in contact with the heating element, the inlet and the outlet being respectively located on both sides of the first fin, and the heating element being at least partially located between the first fin and the second side wall; a first gap is provided between the first fin and the top wall of the containing cavity for the fluid to pass through; the gaps between the first fin and the bottom wall, the third side wall and the fourth side wall of the containing cavity are all less than or equal to a second gap, the second gap ranges from 0mm to 3.0mm and is smaller than the first gap.

[0006] The scale is generally accumulated after a long-term use, and the scale problem of the new boiler is not obvious. In the early stage of use of the boiler, the gap larger than 0 between the first fin and the walls of each cavity can be used for fluid to pass through. In this way, the fluid can pass through the first fin to the outlet more quickly, and the efficiency of outputting the fluid from the outlet is accelerated. As the use time of the boiler is prolonged, the gap between the first fin and the bottom wall, the third side wall and the fourth side wall of the accommodating cavity is gradually blocked by the scale. However, the first gap can remain unblocked in the later stage of use of the boiler due to the larger space. Further, in the case that the scale is seriously accumulated in the later accommodating cavity, the fluid can also pass through the first fin to the outlet through the first gap.

[0007] As described above, for the convenience of description, the accommodating cavity is divided into a main scale-accumulating space and a secondary scale-accumulating space approximately based on the first fin. The gap space between the first fin and the cavity wall where the outlet is located is the secondary scale-accumulating space, and the secondary scale-accumulating space refers to the space adjacent to the outlet. The main scale-accumulating space refers to the space far from the water outlet, which is preferentially and easily accumulated with scale.

[0008] In the process of using the boiler, water enters the accommodating cavity through the inlet and accumulates at the bottom of the accommodating cavity and contacts the heating element. The heating element generates heat after being powered on to heat the water. Since the outlet is located in the secondary scale-accumulating space, the main scale-accumulating space and the secondary scale-accumulating space are in fluid communication, and then the steam and hot water generated in the main scale-accumulating space flow to the secondary scale-accumulating space and then flow out from the outlet. In this process, the calcium, magnesium and other scale-forming ions contained in the steam and hot water preferentially accumulate scale in the main scale-accumulating space, reducing the scale-forming ion content of the steam and hot water entering the secondary scale-accumulating space, and further reducing the scale accumulation in the secondary scale-accumulating space. Moreover, since the heating area of the heating element in the main scale-accumulating space is larger than that in the secondary scale-accumulating space, more scale will also accumulate in the main scale-accumulating space, further reducing the scale accumulation in the secondary scale-accumulating space.

[0009] The isolation effect of the first fin can effectively change the fluid flow path, so that the water and steam flow from the main scale-accumulating space to the secondary scale-accumulating space in the desired direction. This path can be designed to be longer, which can further reduce the scale-forming ion content of the water and steam entering the secondary scale-accumulating space.

[0010] In addition to separating the internal space of the accommodating cavity, the first fin can also increase the heat dissipation area of the heating element, improve the heat dissipation effect, and reduce the risk of pipe explosion of the heating element. Moreover, the heating element can also serve as a mounting carrier of the first fin, and the heating element and the first fin complement each other to improve the scale problem and the performance problem of the boiler.

[0011] Optionally, the distance between the outlet and the bottom wall is greater than the second gap.

[0012] Optionally, the gap between at least one of the bottom wall, the third side wall and the fourth side wall of the accommodating cavity and the first fin is 0.

[0013] Optionally, the second side wall, the first fin, the third side wall, the fourth side wall and the bottom wall enclose a main fouling space, and the first side wall, the first fin, the third side wall, the fourth side wall and the bottom wall enclose a secondary fouling space. The heating element extends from the main fouling space to the secondary fouling space, and the heating area of the heating element in the main fouling space is greater than the heating area of the heating element in the secondary fouling space, and the outlet is communicated with the secondary fouling space.

[0014] Optionally, the second gap is less than or equal to 1.0 mm.

[0015] Optionally, the first gap ranges from 4.0 mm to 7.0 mm.

[0016] Optionally, the inlet is arranged on the top wall and is arranged opposite to the part of the heating element in the main fouling space, and the outlet is arranged on the first side wall, and the height of the outlet is lower than the top of the first fin.

[0017] Optionally, the outlet is used to output steam and hot water, and the height of the outlet is less than 1 / 2 of the height of the first side wall.

[0018] Optionally, the outlet is used to output at least steam, and the heating element comprises a water immersion section and a raised section, and the distance between the raised section and the bottom wall of the accommodating cavity is greater than the distance between the water immersion section and the bottom wall of the accommodating cavity. The water immersion section is located between the second side wall and the first fin, the raised section is at least partially located between the first side wall and the first fin, and is at least partially a dry-burning section, and the first fin is arranged on the raised section.

[0019] Optionally, the heating element gradually inclines upward from the second side wall to the second side wall, and the second side wall inclines from bottom to top in a direction away from the first side wall.

[0020] Optionally, the boiler further comprises at least one second fin, the second fin is in contact with the heating element and is located in the main fouling space, the second fin at least partially extends to the space below the heating element, and the distance between the second fin and the cavity wall of the accommodating cavity is greater than the distance between the corresponding position of the first fin and the cavity wall of the accommodating cavity.

[0021] The second aspect of the embodiments of the present application further provides a boiler, which comprises: a shell having an accommodating cavity, and an inlet and an outlet communicated with the accommodating cavity, respectively; a heating element for heating fluid in the accommodating cavity; a first fin located in the accommodating cavity and in contact with the heating element; The first fin divides the accommodating cavity into a primary fouling space and a secondary fouling space, the primary fouling space and the secondary fouling space are in fluid communication at least through a first gap between the first fin and a top wall of the accommodating cavity, the primary fouling space and the secondary fouling space are located on opposite sides of the first fin respectively, the heating element extends from the primary fouling space to the secondary fouling space, the inlet is communicated with the primary fouling space, and the outlet is communicated with the secondary fouling space.

[0022] The third aspect of the present application provides a floor brush, which comprises a floor brush body, a cleaning element, and the boiler of the first aspect or the second aspect, the boiler and the cleaning element are arranged in the floor brush body, and the boiler is used to provide steam or hot water for a surface to be cleaned or the cleaning element.

[0023] The fourth aspect of the present application provides a cleaning device, which comprises the floor brush of the third aspect, a machine body, and a clean water tank, the machine body is connected with the floor brush, and the clean water tank is used to provide a cleaning liquid for the boiler.

[0024] The fifth aspect of the present application further provides a boiler control method, which is applied to the boiler of the first aspect or the second aspect, and the control method comprises the following steps: liquid water is input to the primary fouling space on one side of the first fin through the inlet to maintain a certain water level or a certain time length, and then the liquid flow output from the inlet is adjusted in a first mode, so that the input liquid water remains in the primary fouling space; after the liquid water in the primary fouling space is heated to a preset time length or a preset temperature, the liquid flow input through the inlet is adjusted in a second mode, so that the heated liquid water in the primary fouling space overflows to the secondary fouling space on the other side of the first fin through the first gap, and then flows to the outlet through the secondary fouling space.

[0025] Optionally, when it is detected that the accumulated working time length of the boiler reaches a first predetermined value, or the accumulated input flow of the inlet reaches a second predetermined value, the control method is triggered.

[0026] Optionally, the adjusting of the liquid flow input through the inlet in the first mode comprises reducing the current liquid flow input through the inlet, or stopping the liquid input through the inlet; and the adjusting of the liquid flow input through the inlet in the second mode comprises increasing the current liquid flow input through the inlet, or starting the liquid input through the inlet.

[0027] Optionally, the preset time length is determined by one or more of an ambient temperature in which the boiler is located, a predetermined hot water output temperature, a volume of the main scale space, and a power of the heating element.

[0028] Optionally, before the liquid water in the main scale space is heated to the preset time length or the preset temperature, a liquid water level in the main scale space is greater than 90% of a top height of the first fin. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or prior art description. Obviously, the drawings in the following description are some embodiments of the present application, and other drawings can be obtained by those skilled in the art without any creative effort on the basis of these drawings.

[0030] Figure 1 A structural schematic diagram of a cleaning device provided by some embodiments of the present application; Figure 2 A structural schematic diagram of a boiler provided by some embodiments of the present application; Figure 3 A transverse sectional view schematic diagram of a boiler provided by some embodiments of the present application; Figure 4 A longitudinal sectional view schematic diagram of a boiler provided by some embodiments of the present application; Figure 2 Figure 5 A structural schematic diagram of a boiler provided by some embodiments of the present application; Figure 3 A structural schematic diagram of a heating element provided by some embodiments of the present application; Figure 6 A structural schematic diagram of a non-U-shaped heating element provided by some embodiments of the present application; Figure 7 A transverse sectional view schematic diagram of another boiler provided by some embodiments of the present application; Figure 8 A longitudinal sectional view schematic diagram of a boiler provided by some embodiments of the present application; Figure 9 Figure 3 A distribution diagram of scale in a boiler after long-term use provided by some embodiments of the present application; Figure 10 A flow schematic diagram of a boiler control method provided by some embodiments of the present application.

[0031] Explanation of reference signs: 110, body; 111, handle; 120, floor brush; 121, floor brush body; 122, cleaning element; 123, spray head; 130, sewage tank; 140, clean water tank; 150, suction motor; ​​10, housing; 11, containing cavity; 12, inlet; 13, outlet; 14, first side wall; 15, second side wall; 16, top wall of containing cavity; 17, bottom wall of containing cavity; 18, third side wall; 19, fourth side wall; 20, heating element; 21, water immersion section; 22, raised section; 221, inclined extension section; 222, horizontal extension section; 24, spacing; 30, first fin; 31, first fin bottom; 33, first fin top; 34, avoidance space; 341, passing space; 40, second fin; 50, main fouling space; 60, secondary fouling space; 70, first gap. DETAILED DESCRIPTION

[0032] In order to make the technical solutions and beneficial effects of the present application more obvious and easy to understand, the following will be described in detail by listing specific embodiments. The drawings are not necessarily drawn to scale, and local features can be enlarged or reduced to more clearly show the details of the local features; unless otherwise defined, the technical and scientific terms used herein have the same meaning as the technical and scientific terms in the technical field to which the present application belongs.

[0033] In the description of the present application, the orientations or positional relationships indicated by the terms "longitudinal", "transverse", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of simplified description of the present application, and do not indicate that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, i.e. cannot be understood as limiting the present application.

[0034] In the present application, the terms "first" and "second" are only used for the purpose of clear description, and cannot be understood as the relative importance of the indicated features or the number of the indicated technical features. Therefore, the features defined with "first" and "second" can explicitly include at least one of the features. In the description of the present application, the meaning of "a plurality of" is at least two, such as two, three, etc.

[0035] In the present application, unless otherwise explicitly defined, the terms "mounting", "connecting", "connecting", "fixing", "setting", etc. should be broadly understood. For example, "connecting" can be fixed connection, or detachable connection, or integral; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through an intermediate medium, or the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Different from industrial boilers, large commercial heating or hot water boilers, the boiler of the embodiments of the present application is mainly used for household cleaning equipment. Due to the internal space limitation of household cleaning equipment, the boiler volume is usually small, belonging to small or micro boilers.

[0037] The cleaning equipment of the embodiments of the present application includes but is not limited to a scrubber, an electric mop, a steam mop, a sweeping and mopping all-in-one machine, etc.

[0038] For the convenience of description, the cleaning equipment is simply introduced below by taking a scrubber as an example. As shown in Figure 1 The scrubber generally includes a machine body 110 and a floor brush 120, the floor brush 120 is provided with a cleaning piece 122, one end of the machine body 110 is rotatably connected with the floor brush 120, and the other end of the machine body 110 is provided with a handle 111. During cleaning, an operator or user can hold the handle 111, drive the floor brush 120 to move by swinging the machine body 110, and make the cleaning piece 122 frictionally contact with a surface to be cleaned, so as to clean the surface to be cleaned. The surface to be cleaned includes a ground, a carpet, a wall surface, a table top, etc.

[0039] The scrubber can also include a clean water tank 140, which provides the cleaning piece 122 with water or other cleaning liquid to realize wet cleaning of the ground by the cleaning piece 122.

[0040] The scrubber can also include a dirty water tank 130, which is used to collect dirt during cleaning, and the dirt is generally a solid-liquid mixture.

[0041] The cleaning equipment can also include a suction motor 150. Generally, the floor brush 120 is provided with a suction port, and the suction port and the suction motor 150 have a fluid passage therebetween, and the negative pressure suction force generated by the high-speed operation of the suction motor 150 can penetrate the entire fluid passage. Under the action of the negative pressure suction force, the dirt on the surface to be cleaned can enter the dirty water tank 130 through the suction port of the floor brush 120 and the fluid passage.

[0042] During cleaning, if stubborn dirt is encountered, the boiler can be started to start the steam spraying function. For example, the steam generated by the boiler is sprayed to the ground through the nozzle 123 in the front side of the floor brush 120, the hot steam can effectively soften and peel off the stubborn dirt, and also has a high-temperature disinfecting effect on the ground, thereby improving the cleaning effect. After the stubborn dirt is cleaned, the steam spraying function is generally turned off.

[0043] Referring to Figure 3 The accommodating cavity 11 of the boiler is internally provided with a heating piece 20, and the heating piece 20 is mostly in the form of a heating rod or a heating pipe. The heating piece 20 heats the liquid in the accommodating cavity 11 to form steam after being electrified. The main component of the liquid in the accommodating cavity 11 is water, and for the convenience of description, the liquid is taken as water for description below.

[0044] The research and analysis found that one of the main reasons for the boiler failure caused by scaling is that the scale blocks the fluid, such as steam or hot water, from flowing out of the path, especially the scale blocking phenomenon at the outlet 13 is more obvious. If the scale is preferentially blocked at the outlet 13 of the boiler, even if there is still unscaled space in other areas inside the boiler, it is easy to cause the boiler to fail because the scale blocks the outlet 13 and cannot discharge steam or hot water.

[0045] The generation of scale is mainly affected by temperature and water distribution. Scale is more likely to accumulate in areas with higher water temperatures or where water is more likely to come into contact with, for example: scale is more likely to occur on the heating element 20 with a higher temperature, and the cavity wall at the bottom of the containing cavity 11 is more likely to produce scale. In comparison, liquid water is more likely to produce scale than steam, and steam flows upward from the boiling water surface and towards the outlet 13, and the heating element 20 itself and the space below it are more likely to accumulate scale, while the space above the heating element 20 is relatively less likely to be blocked.

[0046] Based on this, the inventive concept of the present application mainly includes, in the later use stage of the boiler with increasing scaling, paying more attention to the location of the scale generated, so that the fluid preferentially scales in the space away from the outlet 13 as much as possible, delaying the blocking process of the fluid flow path, delaying the time when the outlet 13 is blocked, thereby increasing the service life of the boiler.

[0047] The inventive concept of the present application also includes: in the early use stage of the boiler with less scaling problem, ensuring the flow of fluid in the containing cavity 11 of the boiler to be unobstructed, so that the outlet 13 can output the required fluid more quickly.

[0048] In the process of realizing the above-mentioned inventive concept, the embodiments of the present application utilize the different sizes of gaps formed between the first fin 30 and the cavity walls at different positions of the containing cavity 11, so that in the early use stage of the boiler, these gaps are all used for fluid to pass through. As the amount of scale increases, the small gaps are preferentially blocked, and then in the later use stage of the boiler, the fluid basically passes through the first fin 30 through the larger gaps at the preset positions. This way can adjust the fluid flow path in the later stage. For example: lengthen the fluid flow path in the space away from the outlet 13, so that as many easy-to-scale ions as possible in the fluid, such as calcium and magnesium, scale in the space away from the outlet 13, reduce the content of easy-to-scale ions in the fluid flowing to the space near the outlet 13, thereby reducing the scaling rate near the outlet 13, delaying the time when the outlet 13 is blocked, thereby increasing the service life of the boiler. At the same time, the preset positions of the larger gaps are arranged above the first fin 30 or near the top area of the first fin 30, guiding the steam in the later use stage of the boiler to pass through the large gaps which are less likely to be blocked, thereby improving the flow path blocking before the steam reaches the outlet 13.

[0049] The aforementioned space away from the outlet can be defined as a main fouling space, and the space adjacent to the outlet can be defined as a secondary fouling space. For the later use stage when the boiler fouling becomes serious, the technical solution of the embodiment of the present application can also be understood as that the first fin 30 divides the internal space of the boiler into a main fouling space 50 and a secondary fouling space 60. The scale is generated and accumulated as much as possible in the space away from the outlet 13 (the main fouling space 50). By making full use of the main fouling space 50 to foul first, the position of scale formation is reasonably distributed, and even without increasing the space of the containing cavity 11, the scale accumulation in the space (the secondary fouling space 60) adjacent to the outlet 13 can be effectively reduced and slowed down. In addition, the division of the main fouling space 50 and the secondary fouling space 60 is also combined with other structures of the boiler, such as the heating element 20, the outlet 13, the inlet 12, etc., to better guide the scale to be generated in the main fouling space 50.

[0050] In addition to affecting the service life of the boiler, the scale also affects the heat dissipation of the heating element 20, and further affects the steam temperature and the steam generation efficiency. Therefore, the present application also improves the structure of the first fin 30 and the heating element 20 to take into account the improvement of the fouling problem and the performance problem of the boiler.

[0051] The following will be described in detail with reference to the accompanying drawings. Figures 1 to 10 The embodiment of the present application will be further introduced.

[0052] Referring to Figure 2 and Figure 3 The boiler provided by the embodiment of the present application comprises a shell 10, a heating element 20 and a first fin 30. The shell 10 has a containing cavity 11, and an inlet 12 and an outlet 13 which respectively communicate with the containing cavity 11. The cavity wall of the containing cavity 11 comprises a first side wall 14 and a second side wall 15 which are oppositely arranged, a third side wall 18 and a fourth side wall 19 which are oppositely arranged, and a top wall 16 and a bottom wall 17 which are oppositely arranged. The three groups of oppositely arranged cavity walls are respectively located in different directions. For example, as shown in the embodiment of the present application, the first side wall 14 and the second side wall 15 are two cavity walls in the left-right direction. The top wall 16 and the bottom wall 17 are two cavity walls in the up-down direction. The third side wall 18 and the fourth side wall 19 are two cavity walls in the front-rear direction. Figure 2 For example, as shown in the embodiment of the present application, the first side wall 14 and the second side wall 15 are two cavity walls in the left-right direction. The top wall 16 and the bottom wall 17 are two cavity walls in the up-down direction. The third side wall 18 and the fourth side wall 19 are two cavity walls in the front-rear direction. Figure 2 For example, as shown in the embodiment of the present application, the first side wall 14 and the second side wall 15 are two cavity walls in the left-right direction. The top wall 16 and the bottom wall 17 are two cavity walls in the up-down direction. The third side wall 18 and the fourth side wall 19 are two cavity walls in the front-rear direction.

[0053] In some implementations, there can be no obvious division limit between the cavity walls. For example, for a horizontally placed cylindrical containing cavity, the top wall 16, the bottom wall 17, the third side wall 18 and the fourth side wall 19 can all be part of the circumferential side. Of course, any of the aforementioned cavity walls is not necessarily a planar wall.

[0054] The heating element 20 is used to heat the fluid in the containing cavity 11. The first fin 30 is located in the containing cavity 11 and is in contact with the heating element 20. The inlet 12 and the outlet 14 are respectively located on two sides of the first fin 30. The heating element 20 is at least partially located between the first fin 30 and the second side wall 15. A first gap 70 for the fluid to pass through is provided between the first fin 30 and the top wall 16 of the containing cavity 11. The gaps between the first fin 30 and the bottom wall 17, the third side wall 18 and the fourth side wall 19 of the containing cavity are all less than or equal to a second gap, which is in the range of 0mm to 3.0mm and is less than the first gap.

[0055] The scale generally accumulates after a long period of use, and the scale problem of a new boiler is not obvious. During the early use of the boiler, the gaps between the first fin 30 and the cavity walls are all greater than 0 and can allow the fluid to pass through. In this way, the fluid can pass through the first fin 30 to the outlet 13 more quickly, and the efficiency of the fluid output from the outlet 13 is accelerated. As the boiler is used for a longer time, the gaps between the first fin 30 and the bottom wall 17, the third side wall 18 and the fourth side wall 19 of the containing cavity are gradually blocked by the scale. However, the first gap 70 can remain unblocked in the later stage of the use of the boiler due to the larger space. Furthermore, in the case of serious scale accumulation in the containing cavity 11 in the later stage, the fluid can also pass through the first fin 30 through the first gap 70 and flow to the outlet 13.

[0056] As mentioned above, for the convenience of description, the containing cavity 11 is divided into a main scale accumulation space 50 and a secondary scale accumulation space 60 approximately based on the first fin 30. The secondary scale accumulation space 60 refers to the space adjacent to the outlet 13, and the main scale accumulation space 50 refers to the space far from the outlet 13, which is prone to scale accumulation.

[0057] During the use of the boiler, water enters the containing cavity 11 through the inlet 12 and accumulates at the bottom of the containing cavity 11 and contacts the heating element 20. The heating element 20 generates heat after being powered on to heat the water. Since the outlet 13 is located in the secondary scale accumulation space 60, the main scale accumulation space 50 and the secondary scale accumulation space 60 are in fluid communication, and thus the steam and hot water generated in the main scale accumulation space 50 flow to the secondary scale accumulation space 60 and then flow out through the outlet 13. During this process, the calcium, magnesium and other scale-forming ions contained in the steam and hot water are prone to scale accumulation in the main scale accumulation space 50, which reduces the scale-forming ion content of the steam and hot water entering the secondary scale accumulation space 60, thereby reducing the scale accumulation in the secondary scale accumulation space 60. Moreover, since the heating area of the heating element 20 in the main scale accumulation space 50 is larger than that in the secondary scale accumulation space 60, more scale is also accumulated in the main scale accumulation space 50, further reducing the scale accumulation in the secondary scale accumulation space 60.

[0058] The isolation of the first fins 30 can effectively change the fluid flow path, so that water and steam flow from the main fouling space 50 to the secondary fouling space 60 in the desired direction. This path can be designed to be longer, which can further reduce the content of fouling ions in the water and steam entering the secondary fouling space 60.

[0059] In addition to separating the internal space of the accommodating cavity 11, the first fins 30 can also increase the heat dissipation area of the heating element 20, improve the heat dissipation effect, and reduce the risk of pipe explosion of the heating element 20. Moreover, the heating element 20 can also serve as a mounting carrier for the first fins 30. The heating element 20 and the first fins 30 can both improve the fouling problem and the boiler performance problem.

[0060] As shown in Figure 3 and Figure 4 , the aforementioned first gap 70 can refer to the minimum height H of the top space of the first fins 30. Here, the minimum height H of the top space of the first fins 30 can be the vertical distance between the top of the first fin 33 and the top of the accommodating cavity 11, as shown in Figure 3 . It can also be the vertical distance between the top of the raised section 22 (to be described in detail below) of the heating element 20 and the top of the accommodating cavity 11, as shown in Figure 8 . As shown in the dashed raised section 22 in Figure 8 , the raised section 22 has a high raised height, resulting in a vertical distance between the top of the raised section 22 and the top of the accommodating cavity 11 that is smaller than the vertical distance between the top of the first fin 30 and the top of the accommodating cavity 11.

[0061] The first fin bottom 31 is where water accumulates and is prone to fouling, while the first fin top 33 is far away from water and has a lower fouling rate. Even if the boiler is used for a long time, the first fin bottom 31 and the space on the side (which can be understood as the front and back sides) are blocked by scale, and the first gap 70 is not easy to block, which can effectively ensure that the flow path from the main fouling space 50 to the secondary fouling space 60 is unobstructed.

[0062] In some embodiments, in order to make the steam outflow path more unobstructed, referring to Figure 4 , the first fin 30 has an avoidance space 34 that not only avoids the heating element 20 but also has a passing space 341 for fluid to pass through. After long-term use, the first fin bottom 31, the side, and the avoidance space 34 of the first fin 30 are prone to be blocked by scale, but fluid can still pass through the first gap 70 which is not prone to fouling. It should be noted that even if steam passes through the first fin 30 to flow to the secondary fouling space 60, since the passing space 341 is located in the gap 24 formed by the heating element 20, which has a higher temperature, it is more likely to trap fouling ions and has little effect on the accumulation of scale in the secondary fouling space 60.

[0063] In some embodiments, the boiler comprises a housing 10 having a containing cavity 11, and an inlet 12 and an outlet 13 respectively communicating with the containing cavity 11; a heating element 20 for heating fluid in the containing cavity 11; and a first fin 30 located in the containing cavity 11 and in contact with the heating element 20. The first fin 30 divides the containing cavity 11 into a primary fouling space 50 and a secondary fouling space 60, which are respectively located on opposite sides of the first fin 30, and are in fluid communication through a first gap 70 between the first fin 30 and a top wall 16 of the containing cavity 11, and the heating element 20 extends from the primary fouling space 50 to the secondary fouling space 60, the inlet 12 communicates with the primary fouling space 50, and the outlet 13 communicates with the secondary fouling space 60. The technical effects of this embodiment are similar to the foregoing, and will not be repeated here.

[0064] In some alternative embodiments, the distance between the outlet 13 and the bottom wall 17 is greater than the second gap. This arrangement can effectively prevent fluid (especially liquid water) from flowing directly to the outlet 13 through the gap between the first fin and the bottom wall 17 before being sufficiently heated, and can effectively ensure that the gap between the first fin and the bottom wall 17 is blocked by scale before the outlet 13, reducing the impact of scale on the outlet 3.

[0065] In some alternative embodiments, the second gap is less than or equal to 1.0 mm.

[0066] The gap sizes between the bottom wall 17, the third side wall 18, the fourth side wall 19 of the containing cavity and the corresponding positions of the first fin 30 are each independent and can be equal or different. These gaps can each independently be set to any one of 0.3 mm, 0.5 mm, 0.8 mm, 1.0 mm, 1.2 mm, 1.5 mm, 2.0 mm, 2.5 mm, 3.0 mm or between any two of these values.

[0067] In addition, these gaps between the cavity walls of the containing cavity and the corresponding positions of the first fin 30 can each be an assembly gap. The assembly gap is preferably 0.4 mm. The smaller these gaps are, the easier they are to block with scale, and the more space can be reserved for the first gap 70.

[0068] In some alternative embodiments, the first gap H is in the range of 4.0 mm to 7.0 mm. If this height is too small, it can easily lead to scale blockage later, affecting the smooth flow of the fluid path. If it is too large, the scale carried by the airflow can also enter the secondary fouling space 60 through this top space, and the amount of scale passing through is high, which can easily cause the outlet 13 to be blocked.

[0069] For example, the first gap 70 can be 5.9 mm, 6.0 mm, or 6.1 mm, etc.

[0070] In some alternative embodiments, the gap between at least one of the bottom wall 17, the third side wall 18 and the fourth side wall 19 of the accommodating cavity and the first fin 30 is 0. At the position where the gap is 0, the first fin 30 can be arranged in abutment with the corresponding cavity wall of the accommodating cavity 11, or integrally formed with the cavity wall, or inserted into the cavity wall. Basically, the smaller the gap, the more conducive to the fluid to scale preferentially in the main scaling space 50, and the more conducive to prolonging the service life of the boiler.

[0071] Referring to Figure 3 and Figure 4 In some alternative embodiments, the inlet 12 is arranged on the top wall 16 and opposite to the portion of the heating element 20 located in the main scaling space 50, and the outlet 13 is arranged on the first side wall 14, and the height of the outlet 13 is lower than the top of the first fin 30. In this way, the first fin 30 can better block the fluid, and more fluid can be guided to flow to the outlet 13 in a detour through the first gap 70, and the fluid directly flowing to the outlet 13 through the first fin 30 can be reduced, and the outlet 13 can be slowed down from being blocked by scale.

[0072] Referring to Figure 4 , the outlet 13 is located in the orthographic projection of the first fin 30 on the cavity wall where the outlet 13 is located. The first fin 30 is opposite to the outlet 13, which can further improve the blocking effect of the fluid.

[0073] In some alternative embodiments, the second side wall 15, the first fin 30, the third side wall 18, the fourth side wall 19 and the bottom wall 17 enclose the main scaling space 50, and the first side wall 14, the first fin 30, the third side wall 18, the fourth side wall 19 and the bottom wall 17 enclose the secondary scaling space 60. The heating element 20 extends from the main scaling space 50 to the secondary scaling space 60, and the heating area of the heating element 20 in the main scaling space 50 is greater than the heating area of the heating element 20 in the secondary scaling space 60, and the outlet 13 is communicated with the secondary scaling space 60.

[0074] The larger heating area of the heating element 20 in the main scaling space 50 is also conducive to accelerating the scaling speed of the easily scaling ions in the main scaling space 50.

[0075] In some alternative embodiments, the outlet 13 is at least used for outputting steam, and the heating element 20 includes a water immersion section 21 and a raised section 22, the distance between the raised section 22 and the bottom wall 17 of the accommodating cavity 11 is greater than the distance between the water immersion section 21 and the bottom wall 17 of the accommodating cavity 11; the water immersion section 21 is located in the main scaling space 50 (also referred to as between the second side wall 15 and the first fin 30), the raised section 22 is at least partially located in the secondary scaling space 60 (also referred to as between the first side wall 14 and the first fin 30), and is at least partially a dry burning section, and the first fin 30 is arranged on the raised section 22.

[0076] Not only the first fin 30 can improve the scale and the boiler performance, but also the structure improvement of the heating element 20 can improve the scale and the boiler performance. The heating element 20 is partially raised, and the raised section 22 away from the water surface can effectively reduce the scale accumulation rate. Moreover, the raised section 22 away from the water surface has a dry burning effect, which can secondarily heat the steam above the water surface. The raised section 22 is arranged in the secondary scale space 60, which can not only reduce the scale accumulation near the outlet 13, but also make the secondary heating of the steam closer to the outlet 13, so as to ensure that the steam flowing out of the outlet 13 has a higher temperature.

[0077] The first fin 30 is arranged on the raised section 22, which means that the first fin 30 is close to the outlet 13. Compared with the secondary scale space 60, the main scale space 50 has a larger space, and the main scale space 50 can reserve more space for scale. In the embodiment of the present application, the space volume of the main scale space 50 can be 2.5 to 5 times the space volume of the secondary scale space 60. For example, the space volume of the main scale space 50 can be 3 times, 3.5 times, 4 times or 4.3 times the space volume of the secondary scale space 60, etc.

[0078] The outlet 13 can also be used to output hot water. During the cleaning process of the cleaning equipment, the hot water generated by the boiler can be guided to the water distributor above the rolling brush, and the rolling brush can be wetted by the hot water, which can reduce the attachment of oil stains or heavy dirt on the surface of the rolling brush, and can also improve the cleaning effect of the rolling brush on the ground.

[0079] In some optional embodiments, the inlet 12 communicates with the main scale space 50, and the inlet 12 and the outlet 13 are respectively located at opposite ends of the heating element 20 along the extension direction of the heating element 20. In this way, the water entering the containing cavity 11 through the inlet 12 can be preferentially scaled in the main scale space 50, which is conducive to reducing the content of scale-prone ions in the water flowing to the secondary scale space 60.

[0080] The farther the inlet 12 is from the outlet 13, the less the cold water entering the inlet 12 can affect the temperature of the steam and hot water at the outlet 13, so as to ensure the temperature of the steam and hot water flowing out of the boiler.

[0081] Referring to Figure 3 and Figure 8 In some optional embodiments, the heating element 20 extends from the second side wall 15 to the second side wall 15, and the heating element 20 is arranged spaced apart from the first side wall 14. Based on the foregoing description, the heating element 20 is prone to scaling due to high temperature. This layout can make the outlet 13 as far away from the heating element 20 as possible, and further slow down the phenomenon of the outlet 13 being blocked by scale.

[0082] In some optional embodiments, the outlet 13 is used to output steam and hot water, and the height of the outlet 13 is less than 1 / 2 of the height of the first side wall.

[0083] In the related art, in order to improve the problem of scale blocking the fluid passage, the outlet 13 is arranged at a high position, or even at the top of the accommodating cavity 11. In this way, when hot water is needed, the hot water level needs to reach a high height to overflow the hot water, and the efficiency of discharging hot water is poor. In the embodiment of the present application, the outlet 13 is lowered, and the outlet 13 is closer to the bottom wall 17 of the accommodating cavity 11. In this way, the steam and the hot water can easily flow out. Moreover, since the heating element 20 is bent at the outlet 13, after the position of the outlet 13 is lowered, the bent section 22 can avoid being opposite to the outlet 13 as much as possible. Even if the position of the outlet 13 is lowered, the problem of the outlet 13 being blocked can be improved.

[0084] Referring to Figure 9 , Figure 9 The scale is shown by shading, and the distribution of the scale after the boiler is used for a long time is shown. The darker the color of the shading is, the more the amount of the scale on the surface is. The scale preferentially occupies the main scale space 50, and the scale near the outlet 13 and the first gap 70 is relatively small. Even if the amount of the scale is large, the fluid passage is still unblocked, the fluid can pass through the gap between the scale in the direction of the arrow, and the fluid can flow out through the outlet 13. The boiler can still be used normally.

[0085] Referring to Figure 3 In some optional embodiments, the heating element 20 is gradually inclined upward from the second side wall 15 to the first side wall 14. The heating element 20 is arranged in the accommodating cavity 11 in the inclined direction, and the space below the heating element 20 in the main scale space 50 can be more fully used for scale formation.

[0086] Referring to Figure 3 In some optional embodiments, the second side wall 15 is inclined away from the first side wall 14 from bottom to top. The inclined second side wall 15 can increase the space of the main scale space 50, and reserve more space for the scale, which is beneficial to improve the problem of scale blocking.

[0087] Referring to Figure 5 In some optional embodiments, the heating element 20 is mounted on the second side wall 15, the heating element 20 penetrates through the second side wall 15, and the heating element 20 is arranged in the accommodating cavity 11 in a suspended manner. The first fin 30 and the second fin 40 (mentioned below) can be sleeved on the heating element 20, the heating element 20 is sealed and mounted on the second side wall 15, and the first fin 30, the second fin 40, the heating element 20 and the second side wall 15 form an integral whole. Then, the heating element 20 is inserted into the accommodating cavity 11, and the second side wall 15 and other cavity walls are sealed and fixed. This mounting method is simple and convenient.

[0088] The heating element 20 can be a U-shaped tube as shown in the figure, or can be a Figure 5 U-shaped tube as shown in the figure, or can be a Figure 7The non-U-shaped bending pipe is shown in order to ensure sufficient heating area, the number of non-U-shaped heating pipes can be two or more. Either type of pipe can be inclined to form a raised section 22. As shown in Figure 6 and Figure 7 Also shown, can be bent to form a raised section 22.

[0089] In comparison, Figure 7 and Figure 8 The bending pipe shown in the figure has no U-shaped bend, the bending degree is small, the heat distribution is more uniform, and the pipe is less likely to burst.

[0090] Whether it is a U-shaped pipe or a non-U-shaped pipe, the two adjacent pipe sections are spaced apart, so that the heating pipe is in contact with water or steam on the side, increasing the heating area.

[0091] Referring to Figure 7 In some optional embodiments, the water immersion section 21 includes a horizontal heating section, and the raised section 22 includes an inclined extension section 221 connected to the horizontal heating section. This is to form the raised section 22 and the water immersion section 21 by bending.

[0092] Along the extension direction of the heating element 20, the raised section 22 is located between the inlet 12 and the water immersion section 21.

[0093] Referring to Figure 6 In some optional embodiments, the water immersion section 21 includes a horizontal heating section, and the raised section 22 includes a horizontal extension section 222 and an inclined extension section 221, the horizontal heating section and the horizontal extension section 222 are parallel and connected to opposite ends of the inclined extension section 221. In this way, along the extension direction of the heating element 20, the heating element 20 has two bends, which can increase the heating area of the heating element 20. The horizontal extension section 222 can also take into account that the first gap 70 has sufficient distance.

[0094] In some optional embodiments, the boiler further comprises at least one second fin 40, the second fin 40 is in contact with the heating element 20 and located in the main scaling space 50, the second fin 40 at least partially extends to the space below the heating element 20, and the distance between the second fin 40 and the cavity wall of the containing cavity 11 is greater than the distance between the corresponding position of the first fin 30 and the cavity wall of the containing cavity 11.

[0095] The structure of the second fin 40 can be the same as that of the first fin 30, but the width, height and other dimensions are smaller. The second fin 40 can further increase the heat dissipation area of the heating element 20. The second fin 40 is preferably arranged at the raised section 22, and when the raised section 22 is dry, the second fin 40 can further reduce the phenomenon of dry burning section pipe burst.

[0096] The second fins 40 can also serve as a scale adhesion carrier to guide scale to preferentially adhere to the main scale formation space 50, in particular, the main scale formation space 50 below the heating element 20.

[0097] Figure 3 And Figure 5 Two second fins 40 are exemplarily shown. The number of the second fins 40 is not limited thereto, and the number of the second fins 40 is not a limitation on the embodiments of the present application.

[0098] The embodiments of the present application also provide a floor brush 120, which comprises a floor brush body 121, a cleaning element 122, and the boiler according to any one of the preceding embodiments. The boiler and the cleaning element 122 are arranged on the floor brush body 121, and the boiler is configured to provide steam or hot water for a surface to be cleaned or the boiler.

[0099] The cleaning element 122 is exemplarily taken as a rolling brush. In some implementations, a water distributor is arranged above the back side of the rolling brush, and a spray head 123 is arranged above the front side of the rolling brush. The water distributor and the spray head 123 are respectively connected to the outlet 13 of the boiler. When steam needs to be sprayed, the outlet 13 and the spray head 123 are controlled to be in conduction, and the spray head 123 sprays steam to the ground. When hot water needs to be sprayed, the outlet 13 and the water distributor are controlled to be in conduction, and the water distributor distributes hot water to the surface of the rolling brush.

[0100] Referring to Figure 1 The embodiments of the present application also provide a cleaning device, which comprises the floor brush 120 according to any one of the preceding embodiments, a machine body 110 connected to the floor brush 120, and a clean water tank 140 configured to provide a cleaning liquid for the boiler.

[0101] The clean water tank 140 can be arranged on the machine body 110 or the floor brush 120.

[0102] The other structures of the cleaning device can be the same as those in the prior art, and will not be described herein.

[0103] Referring to Figure 10 The embodiments of the present application also provide a boiler control method, which is applied to the boiler according to any one of the preceding embodiments. The control method comprises the following steps. S110, inputting liquid water to the main scale formation space 50 on one side of the first fin 30 through the inlet 12 to maintain a certain water level or for a certain time length; S120, adjusting the flow of the liquid water input from the inlet 12 in a first mode, so that the input liquid water remains in the main scale formation space 50; S130, the liquid water in the main fouling space 50 is heated to a preset time length or a preset temperature, and the liquid water flow rate input by the inlet 12 is adjusted in the second mode, so that the heated liquid water in the main fouling space 50 overflows to the secondary fouling space 60 on the other side of the first fin 30 through the first gap 70 and flows to the outlet through the secondary fouling space 60.

[0104] In step S110, the water level and the time length are both referenced to the maximum water capacity of the main fouling space 50, and the input liquid water is required not to overflow the main fouling space 50. Among them, the "time length" can be converted into water volume according to the input liquid water flow rate, and then the water level in the main fouling space 50 is determined. In step S130, in the later stage of the boiler, since the scale blocks the fluid channel below the first fin 30, the water level of the liquid water is lower than the first fin 30, and basically no water passes through the first fin 30. Therefore, after the water level of the liquid water is heated to a preset time length or a preset temperature, the liquid water is controlled to overflow to the secondary fouling space 60, which can not only ensure that the temperature of the hot water flowing out of the outlet 13 can reach the required temperature, but also can more fully utilize the main fouling space to preferentially foul and reduce the amount of scale in the secondary fouling space 60.

[0105] In some embodiments, the control method is triggered when it is detected that the cumulative working time length of the boiler reaches a first predetermined value, or the cumulative input flow rate of the inlet 12 reaches a second predetermined value.

[0106] The first predetermined value or the second predetermined value can preliminarily determine that the gap between the first fin 30 and the bottom wall 17, the third side wall 18, and the fourth side wall 19 of the containing cavity is blocked by scale. That is, the control method of the present application is aimed at the later stage of the boiler. At this time, the scale is serious, and basically all the paths for fluid communication between the main fouling space 50 and the secondary fouling space 60 are blocked by scale except the first gap 70. In this way, the liquid water input in the foregoing steps S110 and S120 can be better retained in the main fouling space 50.

[0107] In some embodiments, adjusting the liquid flow rate input by the inlet 12 in the first mode includes reducing the current liquid flow rate input by the inlet 12, or stopping the liquid input by the inlet 12; and adjusting the liquid flow rate input by the inlet in the second mode includes increasing the current liquid flow rate input by the inlet 12, or starting the liquid input by the inlet 12.

[0108] For example, the input liquid water is maintained to a certain water level or a certain time length, and before the liquid water is heated to a preset time length, the input of liquid water into the main fouling space through the inlet is stopped. After the liquid water in the main fouling space 50 is heated to a predetermined time length, the liquid water is continuously input through the inlet 12, so that the heated liquid water in the main fouling space overflows into the secondary fouling space 60, and the heated liquid water is output at the outlet of the secondary fouling space 60.

[0109] Alternatively, the input of liquid water is maintained to a certain water level or a certain time length, and the liquid water is heated to a preset time length, and the input flow of liquid water at the inlet can be reduced. After the liquid water is heated to the preset time length, the input flow of liquid water at the inlet is increased, so that the heated liquid water in the main scale space overflows into the secondary scale space 60, and then is output at the outlet of the secondary scale space 60. In this way, the above-mentioned effect can also be achieved.

[0110] Alternatively, a temperature sensor is used to detect whether the water temperature in the main scale space 50 reaches a preset temperature, to determine whether the hot water in the main scale space 50 overflows into the secondary scale space 60. Similar to the foregoing, before the liquid water temperature in the main scale space 50 reaches the preset temperature, the input of liquid water into the main scale space 50 can be stopped, and after the liquid water temperature in the main scale space 50 reaches the preset temperature, the input of liquid water into the main scale space 50 is continued, so that the heated liquid water overflows into the secondary scale space 60 through the first gap 70. Alternatively, before the liquid water temperature in the main scale space 50 reaches the preset temperature, the input of liquid water into the main scale space 50 is at a small flow rate. After the liquid water temperature in the main scale space 50 reaches the preset temperature, the flow rate of liquid water input into the main scale space 50 is increased.

[0111] In some optional embodiments, the preset time length is determined by one or more of the ambient temperature of the boiler, the predetermined hot water output temperature, the volume of the main scale space, and the power of the heating element.

[0112] The ambient temperature of the boiler generally refers to the room temperature. The predetermined hot water output temperature refers to the water temperature at the outlet or the water temperature at the outlet of the water distributor.

[0113] Generally, the higher the ambient temperature, the shorter the preset time length. The higher the predetermined hot water output temperature, the longer the preset time length. The larger the volume of the main scale space, the longer the preset time length. The greater the heating power of the heating element, the shorter the preset time length. The preset time length can be set according to multiple factors that affect the heating time.

[0114] The flow rate of the input liquid water can be determined by one or more of the room temperature, the predetermined hot water output temperature, and the power of the heater.

[0115] In some optional embodiments, before the liquid water in the main fouling space 50 is heated to the preset temperature for the preset time length, the liquid water level in the main fouling space 50 is greater than 90% of the top height of the first fin 30. Before the liquid water in the main fouling space 50 is heated to the preset temperature, the liquid water level in the main fouling space 50 is close to the top height of the first fin 30, and the liquid water level in the main fouling space 50 is less than 100% of the top height of the first fin. That is, the highest water level that the liquid water in the main fouling space 50 can hold without overflowing into the secondary fouling space 60. In this way, the heating time of the liquid water in the main fouling space 50 can be prolonged, and the easily fouling ions in the liquid water can be more fully intercepted in the main fouling space 50, thereby reducing the amount of fouling in the secondary fouling space 60.

[0116] The cleaning device of the embodiments of the present disclosure can include a controller and the components included in the cleaning device according to any of the above embodiments. The controller is configured to perform the method according to any of the above embodiments.

[0117] The specific implementation of the cleaning device control mode performed by the controller is as described in any of the above embodiments, and will not be repeated here.

[0118] The present application also provides a computer-readable storage medium, which stores computer-executable instructions. When a processor executes the computer-executable instructions, the method described above is implemented.

[0119] The computer-readable storage medium provided by the embodiments can execute the method of the above embodiments, and has similar implementation principles and technical effects. The embodiments will not be repeated here.

[0120] The computer-readable storage medium described above can be implemented by any type of volatile or non-volatile storage device or a combination thereof, such as static random access memory (SRAM), electrically erasable programmable read-only memory (EEPROM), erasable programmable read-only memory (EPROM), programmable read-only memory (PROM), read-only memory (ROM), magnetic memory, flash memory, magnetic disk or optical disk. The readable storage medium can be any available medium that can be accessed by a general-purpose or special-purpose computer.

[0121] The embodiments or implementations in the specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other.

[0122] In the description of the specification, the description of "one embodiment", "some embodiments", "exemplary embodiment", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are contained in at least one embodiment or example of the present application. In the description of the specification, the exemplary description of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any appropriate manner in one or more embodiments or examples.

[0123] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement for part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A boiler, characterized in that, The boiler includes: The housing has a receiving cavity, and an inlet and an outlet respectively communicating with the receiving cavity. The cavity wall includes a first side wall and a second side wall, a third side wall and a fourth side wall, and a top wall and a bottom wall arranged opposite to each other. A heating element for heating the fluid within the receiving cavity; The first fin is located inside the receiving cavity and in contact with the heating element. The inlet and the outlet are located on both sides of the first fin, and the heating element is at least partially located between the first fin and the second sidewall. A first gap is provided between the first fin and the top wall of the receiving cavity for fluid to pass through; the gaps between the first fin and the bottom wall, the third side wall and the fourth side wall of the receiving cavity are all less than or equal to the second gap, the second gap ranges from 0 mm to 3.0 mm and is smaller than the first gap.

2. The boiler according to claim 1, characterized in that, The distance between the outlet and the bottom wall is greater than the second gap.

3. The boiler according to claim 1, characterized in that, The gap between at least one of the bottom wall, the third side wall, and the fourth side wall of the receiving cavity and the first fin is 0.

4. The boiler according to claim 1, characterized in that, The second sidewall, the first fin, the third sidewall, the fourth sidewall, and the bottom wall form a main scaling space, and the first sidewall, the first fin, the third sidewall, the fourth sidewall, and the bottom wall form a secondary scaling space. The heating element extends from the main scaling space to the secondary scaling space, and the heating area of ​​the heating element in the main scaling space is greater than the heating area of ​​the heating element in the secondary scaling space. The outlet is connected to the secondary scaling space.

5. The boiler according to claim 1, characterized in that, The second gap is less than or equal to 1.0 mm, and the first gap ranges from 4.0 mm to 7.0 mm.

6. The boiler according to claim 4, characterized in that, The inlet is located on the top wall and is positioned opposite to the portion of the heating element located within the main scaling space. The outlet is located on the first side wall, and the height of the outlet is lower than the top of the first fin.

7. The boiler according to claim 1, characterized in that, The outlet is used to output steam and hot water, and the height of the outlet is less than 1 / 2 of the height of the first sidewall.

8. The boiler according to any one of claims 1 to 7, characterized in that, The outlet is used at least for outputting steam, and the heating element includes a water-immersed section and a raised section, wherein the distance between the raised section and the bottom wall of the receiving cavity is greater than the distance between the water-immersed section and the bottom wall of the receiving cavity; The water-immersed section is located between the second sidewall and the first fin, and the raised section is at least partially located between the first sidewall and the first fin, and is at least partially a dry-burning section, with the first fin disposed on the raised section.

9. The boiler according to claim 8, characterized in that, The heating element gradually tilts upward from the second sidewall toward the first sidewall, and the second sidewall tilts upward from the bottom toward the direction away from the first sidewall.

10. The boiler according to claim 4, characterized in that, The boiler further includes at least one second fin, which contacts the heating element and is located in the main scaling space. The second fin extends at least partially into the space below the heating element, and the distance between the second fin and the cavity wall is greater than the distance between the corresponding position of the first fin and the cavity wall.

11. A boiler, characterized in that, The boiler includes: The housing has a receiving cavity, and an inlet and an outlet respectively communicating with the receiving cavity; A heating element for heating the fluid within the receiving cavity; The first fin is located inside the receiving cavity and is in contact with the heating element; The first fin divides the receiving cavity into a primary scaling space and a secondary scaling space. The primary scaling space and the secondary scaling space are in fluid communication at least through a first gap between the first fin and the top wall of the receiving cavity. The primary scaling space and the secondary scaling space are located on opposite sides of the first fin. The heating element extends from the primary scaling space to the secondary scaling space. The inlet is connected to the primary scaling space, and the outlet is connected to the secondary scaling space.

12. A floor brush, characterized in that, The floor brush includes a floor brush body, a cleaning component, and a boiler as described in any one of claims 1 to 11, wherein the boiler and the cleaning component are both disposed on the floor brush body, and the boiler is used to provide steam or hot water to the surface to be cleaned or the cleaning component.

13. A cleaning device, characterized in that, The cleaning equipment includes the floor brush, the body, and the clean water tank as described in claim 12, wherein the body is connected to the floor brush, and the clean water tank is used to provide cleaning liquid for the boiler.

14. A boiler control method, characterized in that, The control method, applied to the boiler according to any one of claims 1 to 11, comprises: Liquid water is introduced into the main scaling space on one side of the first fin through the inlet and maintained at a certain water level or for a certain duration. Then, the flow rate of the liquid water introduced from the inlet is adjusted in the first mode so that the introduced liquid water remains in the main scaling space. After the liquid water in the main scaling space is heated to a preset time or preset temperature, the flow rate of the liquid water input at the inlet is adjusted in the second mode, so that the heated liquid water in the main scaling space overflows through the first gap to the secondary scaling space on the other side of the first fin, and flows to the outlet through the secondary scaling space.

15. The control method according to claim 14, characterized in that, The control method is triggered when the cumulative operating time of the boiler reaches a first predetermined value, or when the cumulative input flow at the inlet reaches a second predetermined value.

16. The control method according to claim 14, characterized in that, The adjustment of the inlet liquid flow rate in the first mode includes: reducing the current inlet liquid flow rate, or stopping the inlet liquid flow rate; the adjustment of the inlet liquid flow rate in the second mode includes: increasing the current inlet liquid flow rate, or turning on the inlet liquid flow rate.

17. The control method according to claim 14, characterized in that, The preset duration is determined by one or more of the following: the ambient temperature of the boiler, the predetermined hot water output temperature, the volume of the main scaling space, and the power of the heating element.

18. The control method according to claim 14, characterized in that, Before the liquid water in the main scaling space is heated to the preset time or preset temperature, the liquid water level in the main scaling space is greater than 90% of the top height of the first fin.

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