Surface cleaning device with heating assembly

Abstract

The utility model discloses a surface cleaning device with a heating assembly, which belongs to the technical field of cleaning equipment and comprises the heating assembly, the heating assembly comprises a heating pipe and a water pipe shell, and the water pipe shell is sleeved outside the heating pipe to form a heating flow channel between the inner wall of the water pipe shell and the outer wall of the heating pipe. The water pipe shell is provided with a water inlet and a water outlet which are communicated with the heating flow channel, the heating assembly further comprises a temperature measuring piece, the temperature measuring piece is installed on the water pipe shell close to the water outlet, and a temperature measuring probe of the temperature measuring piece stretches into the heating flow channel and abuts against the outer wall of the heating pipe. The position of the temperature measuring piece relative to the heating assembly is reasonably arranged, so that the temperature measuring piece can detect the temperature of the heated liquid and also can detect whether the heating pipe has abnormal conditions such as dry burning, and the production cost is reasonably reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning equipment, in particular to a surface cleaning device with a heating component. Background Art

[0002] With the development of science and technology, the functions of surface cleaners are becoming more and more diversified. In order to improve the cleaning effect, some handheld surface cleaners are equipped with heating elements on the liquid supply pipeline. The heating elements are used to heat the flowing liquid, and the heated liquid is sprayed onto the cleaning element or the ground, thereby improving the cleaning effect of the cleaning element on stubborn stains on the ground.

[0003] In order to reasonably control the heating temperature of the liquid, it is necessary to set a temperature detection element to detect the heated liquid, so that the control module can adjust the heating efficiency of the heating element in time according to the detection signal of the temperature detection element, so that the fluid flowing through the heating element can be stably heated to a certain temperature range. In order to avoid dry burning of the heating element, it is also necessary to set a dry burning detection element on the heating element. Usually, the temperature detection element used to control the temperature of the liquid is arranged near the water outlet of the heating element to measure the temperature of the liquid heated by the heating element, so as to accurately control the heating power of the heating element. In order to avoid long-term dry burning to damage the heating element, the dry burning detection element is usually arranged near the water inlet, and an alarm is issued after detecting that there is no liquid at the water inlet. Therefore, in order to meet the above two different needs at the same time, it is necessary to set a temperature detection element and a dry burning detection element at the same time, which is costly and has a more complicated structure. Utility Model Content

[0004] In order to solve the shortcomings and deficiencies existing in the above-mentioned prior art, the utility model provides a surface cleaning device with a heating component, and reasonably sets the position of the temperature measuring component relative to the heating component, so that the temperature measuring component can not only detect the temperature of the liquid after being heated, but also detect whether the heating tube has abnormal conditions such as dry burning, which is conducive to reasonably reducing production costs.

[0005] In order to achieve the above-mentioned technical objectives, the utility model provides a surface cleaning device with a heating component, including a heating component, wherein the heating component includes a heating tube and a water pipe shell, the water pipe shell is sleeved on the outside of the heating tube to form a heating flow channel between the inner wall of the water pipe shell and the outer wall of the heating tube, the water pipe shell is provided with a water inlet and a water outlet connected to the heating flow channel, the heating component also includes a temperature measuring component, the temperature measuring component is installed on the water pipe shell near the water outlet, and the temperature measuring probe of the temperature measuring component extends into the heating flow channel and abuts against the outer wall of the heating tube.

[0006] Preferably, the heating tube further comprises a heating wire and an electrical connection piece for installing the heating wire, the electrical connection piece comprises a heating section wound by the heating wire and a connecting section not wound by the heating wire, and the axial projection of the temperature measuring probe intersects with the heating section.

[0007] Preferably, the axial projection of the temperature measuring probe is arranged at the end of the heating section, and the water outlet is arranged close to the temperature measuring probe and its axial projection is arranged in the connecting section.

[0008] Preferably, a water outlet buffer platform is also provided on the water pipe shell, and the water outlet buffer platform protrudes outward to form a water outlet buffer cavity connected to the water outlet, and the temperature measuring component is arranged on the water outlet buffer platform and the end of the temperature measuring probe extends into the water outlet buffer cavity.

[0009] Preferably, a spiral heating channel is formed between the water pipe shell and the heating pipe, and the temperature measuring probe is located in the spiral extension area of ​​the heating channel.

[0010] Preferably, a water outlet pipe with the water outlet is also provided on the water outlet buffer platform, and the water outlet pipe is arranged at one end of the water outlet buffer platform away from the heating flow channel.

[0011] Preferably, the water outlet and the temperature measuring component are spaced apart.

[0012] Preferably, the length of the water outlet buffer platform is La, the pitch of the spiral heating channel is P, La>P; and / or the spiral heating channel has 3 to 5 turns.

[0013] Preferably, the temperature measuring component further comprises an insulating sleeve and a fastener, the temperature measuring probe is fixed in the insulating sleeve by the fastener, and the head of the temperature measuring probe extends out of the insulating sleeve and into the heating flow channel.

[0014] Preferably, a step surface is provided on the inner wall of the insulating sleeve, an inner shoulder surface and an outer shoulder surface spaced apart along the axial direction are provided on the outer peripheral wall of the temperature measuring probe, the temperature measuring component also includes a sealing ring clamped between the step surface and the inner shoulder surface, the fastener is locked with the insulating sleeve and contacts with the outer shoulder surface; and / or, the fastener has a screw portion cooperating with the insulating sleeve and a screw head portion provided at one end of the screw portion, the screw head portion is located outside the insulating sleeve and has a reserved gap between the screw head portion and the insulating sleeve.

[0015] After adopting the above technical solution, the utility model has the following advantages:

[0016] 1. The surface cleaning device provided by the utility model has a heating component provided with a temperature measuring component provided near the water outlet, and the temperature measuring probe of the temperature measuring component extends into the heating flow channel and abuts against the heating tube. Since the temperature measuring component is provided near the water outlet and the temperature measuring probe extends into the heating flow channel, the outer peripheral surface of the temperature measuring probe can contact the liquid located near the water outlet in the water pipe shell, so that the temperature measuring component can effectively detect the temperature of the heated liquid, and the control module can adjust the heating intensity of the heating wire according to the temperature signal fed back by the temperature measuring component, so that the heated liquid can be stably maintained near the set temperature value. In addition, since the temperature measuring probe abuts against the heating tube, there is no gap between the end face of the temperature measuring probe and the heating tube. When the heating tube has an abnormal situation such as dry burning, the temperature measuring component directly changes from detecting the temperature of the liquid to detecting the temperature of the heating tube. The excessive heat generated by the heating tube can be directly transferred to the temperature measuring probe. The temperature measuring probe detects a sharp rise in temperature. The control module can determine whether the heating component is abnormal according to the temperature signal fed back by the temperature measuring component and stop heating the heating component in time in an abnormal situation, so as to avoid the situation where the heating tube temperature is too high and fuses or other parts are burned, thereby ensuring the performance stability of the heating component. The position of the temperature measuring element relative to the heating component is reasonably set so that the temperature measuring element can not only detect the temperature of the heated liquid, but also detect whether the heating tube has abnormal conditions such as dry burning, which is conducive to reasonably reducing production costs. In addition, since the temperature measuring element and the heating component can be integrated into a modular structure, there is no need to set a detection element for detecting the liquid temperature at other positions of the liquid supply channel, which can improve assembly efficiency.

[0017] 2. The heating section of the electrical connection piece is wrapped with the heating wire, while the connecting section of the electrical connection piece is not wrapped with the heating wire. Since the heating tube ends heating at the end of the heating wire, the axial projection of the temperature measuring probe preferably intersects with the heating section of the electrical connection piece. The temperature measuring probe and the heating section are arranged correspondingly, so that the temperature measuring probe can detect both the water temperature and the heating tube temperature for dry-burning alarm, thereby reducing the heat loss of the liquid when the temperature is measured by the temperature measuring probe, and improving the accuracy of the temperature measuring probe in detecting the water temperature and the timeliness of the dry-burning alarm.

[0018] 3. The axial projection of the temperature probe is arranged at the end of the heating section, so that the temperature of the fully heated liquid can be detected by the temperature probe at the highest temperature point, thereby ensuring the accuracy of the temperature measurement. The water outlet is arranged close to the temperature probe and its axial projection is preferably arranged in the connecting section. On the one hand, the position of the water outlet relative to the electrical connection is reasonably arranged, thereby reasonably setting the position of the water outlet relative to the heating wire, so that the outside of the heating wire can be wrapped by the liquid, so that the heat generated by the heating wire can be transferred to the liquid through the heating tube, thereby improving the heating effect of the heating tube on the liquid. On the other hand, bubbles will be generated in the process of the liquid being heated in the heating component. In order to ensure that the heated liquid can stably supply liquid to the surface cleaning device and improve the uniformity of the liquid supply, the water outlet is arranged corresponding to the connecting section not wrapped by the heating wire, so that the liquid flowing through the water outlet is no longer heated, thereby gradually reducing the bubbles in the liquid, and the liquid flow tends to be stable, which helps to ensure the flow stability of the liquid supply.

[0019] 4. The water pipe shell is provided with an outwardly protruding water outlet buffer platform, and the water outlet buffer platform forms a water outlet buffer cavity connected with the water outlet. Bubbles will be generated when the liquid flows through the heating flow channel and is heated. The water outlet buffer cavity buffers the liquid flowing from the heating flow channel to the water outlet. The buffer can be used to eliminate the bubbles generated in the heating process and improve the flow stability and flow velocity stability of the liquid flowing out of the water outlet.

[0020] The temperature measuring component is arranged on the water outlet buffer platform. On the one hand, the water outlet buffer platform provides an installation plane for the water outlet and the temperature measuring component, which is conducive to reducing the difficulty of installing the water outlet and the temperature measuring component. On the other hand, the liquid flow path in the water outlet buffer platform is relatively stable, and the liquid flow swirls less when flowing through it. The liquid flow with stable flow direction and speed can fully surround the temperature measuring probe, which can improve the accuracy and sensitivity of temperature measurement.

[0021] 5. A spiral heating channel is formed between the water pipe shell and the heating tube. The specific structure of the heating channel is reasonably set. Under the premise of limited length of the heating wire, the heating channel is made to flow in a spiral along the heating wire, thereby extending the liquid flow path and the heating time. The liquid spirally flowing in the heating channel can be fully heated, thereby improving the heat transfer efficiency from the heating wire to the liquid in the heating channel. At the same time, the liquid can flow smoothly in the heating channel.

[0022] The liquid flows in a spiral in the spiral heating channel, and the flow direction of the liquid is in a dynamic change process. It is difficult to install a temperature probe in the spiral channel, and the liquid cannot fully contact the temperature probe, resulting in differences in temperature measurement results. The heated liquid in the heating channel flows out along the spiral direction of the outflow end, and the temperature probe is preferably located in the spiral extension area of ​​the outflow end of the heating channel. On the one hand, the liquid flowing out of the spiral heating channel has a tendency to move along the tangent direction of the spiral channel, and the temperature probe is located in this area and can fully contact the liquid. On the other hand, the specific position of the temperature probe relative to the heating channel is reasonably set so that the temperature probe can accurately measure the temperature of the heated liquid flowing out of the heating channel, reduce the interference of the dead water liquid in the water outlet buffer platform on the temperature measurement, and improve the accuracy of the temperature measurement.

[0023] 6. The water outlet pipe with a water outlet is arranged on the buffer platform. The water outlet pipe is arranged at the end of the buffer platform away from the heating flow channel. The temperature measuring component is arranged at the end of the buffer platform close to the heating flow channel. The positions of the water outlet pipe and the detection component on the water outlet buffer platform are reasonably arranged so that the heated liquid can flow out from the water outlet after effective buffering to eliminate bubbles, and the temperature measuring component can accurately measure the temperature of the heated liquid.

[0024] 7. Since the temperature measuring component is usually inconsistent with the flow direction of the liquid, the temperature measuring component on the liquid flow path has a certain obstruction and bypass effect on the liquid flow. The water outlet and the temperature measuring component are set at a distance so that the liquid flowing through the temperature measuring component continues to flow for a distance before flowing out of the water outlet, ensuring that there is sufficient liquid between the outflow end of the heating flow channel and the water outlet, so that the temperature measuring probe can effectively and fully contact the heated liquid, ensuring the accuracy of the temperature measurement of the heated liquid by the temperature measuring component, and ensuring that sufficient liquid can be discharged from the water outlet to ensure the stability of the liquid supply.

[0025] 8. The length La of the water outlet buffer platform is preferably set larger than the pitch P of the heating flow channel. The size relationship between the two is reasonably set to ensure that the water outlet buffer platform has a slow-flow effect on the liquid flowing through the heating flow channel, so that the liquid flowing through the heating flow channel can flow out from the water outlet after sufficient slow flow, which is beneficial to improving the flow rate stability of the liquid.

[0026] The spiral heating channel has 3 to 5 turns. The number of turns of the heating channel is reasonably set to ensure the heating effect while reasonably controlling the shape of the heating component. If the number of turns of the heating channel is less than 3, the number of turns of the heating channel is too small, which is not conducive to ensuring the heating effect of the liquid, and the heated liquid is difficult to reach the set temperature value. If the number of turns of the heating channel is more than 5, the axial length of the heating component increases accordingly, and the volume of the heating component is larger, which is not conducive to production and manufacturing, nor is it conducive to installation in a small space.

[0027] 9. The temperature probe is fixed in the insulating sleeve by fasteners, and the head of the temperature probe extends out of the insulating sleeve and into the heating flow channel. The sealing ring is clamped between the step surface of the insulating sleeve and the inner shoulder surface of the temperature probe. The fastener is locked with the insulating sleeve and contacts the outer shoulder surface. The contact between the fastener and the outer shoulder surface allows the temperature probe to be axially positioned, so that the sealing ring can be stably clamped between the step surface and the inner shoulder surface to ensure the sealing performance between the temperature probe and the insulating sleeve. The screw part of the fastener cooperates with the insulating sleeve, and the screw head of the fastener is located outside the insulating sleeve and has a reserved gap with the insulating sleeve. The reserved gap ensures that the temperature probe fixed in the insulating sleeve by the fastener is fully in contact with the heating tube, avoiding the situation where the temperature probe does not contact the heating tube due to improper installation caused by manufacturing errors. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is a diagram of the entire surface cleaning device of Example 1;

[0029] Figure 2 It is a partial cross-sectional view of a floor brush in a surface cleaning device according to Embodiment 1;

[0030] Figure 3 is a cross-sectional view of a floor brush in a surface cleaning device of Example 1 along the front-to-back direction;

[0031] Figure 4 It is a schematic diagram of a liquid supply structure in a surface cleaning device in Example 1;

[0032] Figure 5 It is a structural diagram of a heating component in a surface cleaning device of Example 1;

[0033] Figure 6 is a cross-sectional view of a heating component in a surface cleaning device of Embodiment 1 along an axial direction;

[0034] Figure 7 for Figure 6 Enlarged view of point E in the middle;

[0035] Figure 8 An exploded view of a heating assembly in a surface cleaning device according to Embodiment 1;

[0036] Fig. 9 It is a structural diagram of a water pipe housing of a heating assembly in a surface cleaning device of Example 1;

[0037] Fig.10 It is a cross-sectional view of the temperature measuring element in the surface cleaning device of the first embodiment along the axial direction;

[0038] Fig.11 An exploded view of a temperature measuring component in a surface cleaning device in Example 1;

[0039] Fig.12It is a cross-sectional view of the floor brush body in the surface cleaning device of Example 1 along the left-right direction;

[0040] Fig.13 It is a structural diagram of the upper housing in the surface cleaning device of Example 1;

[0041] Fig.14 Schematic diagram of the liquid supply structure in the surface cleaning device of Example 2.

[0042] In the figure, 10-liquid supply channel,

[0043] 20-floor brush, 201-floor brush body, 201a-upper shell, 201b-lower shell, 202-front cover, 203-nozzle, 204-solenoid valve, 21-installation cavity, 22-cleaning part, 23-drive motor, 24-water pump, 25-water spray part, 2501-inlet, 2502-nozzle, 2601-side insulation pad, 2602-end insulation pad, 27-sewage suction port, 28-scraping part, 29-elastic floor scraper,

[0044] 30-body, 301-handle bar,

[0045] 40-clean water tank,

[0046] 50-control module,

[0047] 60-battery pack,

[0048] 70-sewage bucket,

[0049] 100-heating assembly, 110-heating wire, 120-heating tube, 130-water pipe shell, 131-water inlet buffer platform, 131a-first bottom surface, 131b-water inlet buffer cavity, 132-water outlet buffer platform, 132a-second bottom surface, 132b-water outlet buffer cavity, 140-water inlet pipe, 141-water inlet, 150-water outlet pipe, 151-water outlet, 160-heating flow channel, 161-inflow end, 162-outflow end, 170-electrical connection piece, 171-first electrical connection piece, 171a-first heating section, 171b-first connecting section, 172-second electrical connection piece, 172a-second heating section, 172b-second connecting section, 180-plug,

[0050] 200-temperature measuring part, 210-temperature measuring probe, 211-inner shaft shoulder surface, 212-outer shaft shoulder surface, 220-insulating sleeve, 221-step surface, 230-fastener, 231-screw part, 232-screw head, 240-sealing ring. DETAILED DESCRIPTION

[0051] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following words indicating orientation or positional relationship such as "upper", "lower", "left", "right", "longitudinal", "lateral", "inner", "outer", "vertical", "horizontal", "top", "bottom", etc. are only based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device / element referred to must have a specific orientation or be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

[0052] Embodiment 1

[0053] A surface cleaning device for wiping a surface to be cleaned, comprising at least a cleaning member for wiping the surface to be cleaned and a liquid supply assembly for supplying liquid to the cleaning member or the surface to be cleaned. The liquid supply assembly may include a clean water tank, a liquid supply channel and a water spraying member for storing cleaning liquid, and the liquid supply assembly also includes a heating assembly for heating the cleaning liquid. The liquid flowing through the heating assembly is heated to form a liquid of a preset temperature and then transported to the cleaning member or the surface to be cleaned to soften and clean stubborn stains. It can be imagined by those skilled in the art that the surface cleaning device can be a handheld surface cleaning device such as a floor scrubber, a handheld mop and other wet cleaning devices with a liquid supply assembly, and can also be a self-moving surface cleaning device such as a sweeping and mopping robot, a mopping robot, a window cleaner, a desktop cleaning machine and other self-moving wet cleaning robots with a liquid supply assembly. This embodiment uses a handheld surface cleaning device as an example to illustrate the heating assembly.

[0054] Combination Figures 5 to 11 The first embodiment of the utility model provides a surface cleaning device with a heating component, including a heating component 100, the heating component 100 includes a heating tube 120 and a water tube housing 130, the water tube housing 130 is sleeved on the outside of the heating tube 120 to form a heating channel 160 between the inner wall of the water tube housing 130 and the outer wall of the heating tube 120, and the water tube housing 130 is provided with a water inlet 141 and a water outlet 151 connected to the heating channel 160. The heating component 100 also includes a temperature measuring component 200, which is installed on the water tube housing 130 near the water outlet 151, and the temperature measuring probe 210 of the temperature measuring component 200 extends into the heating channel 160 and abuts against the outer wall of the heating tube 120.

[0055] Since the temperature measuring component 200 is arranged near the water outlet 151 and the temperature measuring probe 210 extends into the heating flow channel 160, the outer peripheral surface of the temperature measuring probe 210 can contact the liquid in the water pipe shell 210 near the water outlet 151, so that the temperature measuring component 200 can effectively detect the temperature of the heated liquid. The control module can adjust the heating intensity of the heating component 100 according to the temperature signal fed back by the temperature measuring component 200, so that the heated liquid can be stably maintained near the set temperature value. Furthermore, since the temperature probe 210 is in contact with the heating tube 120, there is no gap between the end face of the temperature probe 210 and the heating tube 120. When there is no liquid or insufficient liquid at the location of the temperature probe 210 in the heating channel 160 and dry burning occurs, the temperature probe 210 in contact with the heating tube 120 directly detects the temperature of the heating tube 120. The control module can determine whether the heating assembly 100 is abnormal according to the temperature signal fed back by the temperature measuring element and stop heating the heating assembly 100 in time under abnormal conditions, thereby avoiding the situation where the heating tube 120 is overheated and melted or other parts are burned, and ensuring the performance stability of the heating assembly 100. The position of the temperature measuring element 200 relative to the heating assembly 100 is reasonably set, so that the temperature measuring element 200 can not only detect the temperature of the liquid after being heated, but also detect whether the heating tube 120 is dry burning or other abnormal conditions occur, which is conducive to reasonably reducing production costs. In addition, since the temperature measuring element 200 and the heating assembly 100 can be integrated into a modular structure, there is no need to set a detection element for detecting the temperature of the liquid at other positions, which can improve assembly efficiency.

[0056] Combination Figures 5 to 9 In this embodiment, the heating tube 120 is in the shape of a hollow circular tube shell. Optionally, the heating tube 120 can also be a rectangular parallelepiped, a cube or any other structure with a heating wire. A heating wire 110 is arranged in the heating tube 120. Electrical connectors 170 for installing the heating wire 110 are fixed at both axial ends of the heating tube 120. The heating wire 110 is located between two electrical connectors 170 and the two ends of the heating wire 110 are respectively wound around the ends of the two electrical connectors 170. Specifically, the two electrical connectors 170 are fixed to the ends of the heating tube 120 through a plug 180, and the length direction of the electrical connector 170 is substantially parallel to the axial direction of the heating tube 120. The heating tube 120 is filled with magnesium oxide powder, and the plug 180 seals the magnesium oxide powder in the heating tube 120. Part of the electrical connector 170 extends into the heating tube 120, and the other part of the electrical connector 170 passes through the plug 180 and extends out of the heating tube 120 for power supply. The electrical connector 170 is electrically connected to the power supply as a conductive member, so that the heating wire 110 is connected to the circuit. When the circuit is turned on, the heating wire 110 is energized to generate heat, and the generated heat is transferred to the liquid in the heating channel 160 through the heating tube 120 to heat the liquid. Optionally, the plug 180 is usually made of an insulating material, such as ceramic.

[0057] Combination Figure 8 , Fig. 9 In this embodiment, the water pipe shell 130 is in the shape of a hollow tube shell, the middle area of ​​the water pipe shell 130 is bulged and bulges outward in a spiral shape, the water pipe shell 130 is sleeved on the outside of the heating tube 120, and a heating flow channel 160 is formed between the spiral part formed by the bulging of the water pipe shell 130 and the heating tube 120. The heating flow channel 160 is spiral and has an inlet end 161 corresponding to the water inlet 141 and an outlet end 162 corresponding to the water outlet 151.

[0058] In this embodiment, the heating component 100 also includes a water inlet pipe 140 and a water outlet pipe 150. The water inlet 141 is arranged on the water inlet pipe 140, and the water outlet 151 is arranged on the water outlet pipe 150. The water inlet pipe 140 and the water outlet pipe 150 are respectively fixed at the axial ends of the water pipe shell 130.

[0059] As a preferred solution of this embodiment, the electrical connection part 170 includes a heating section wrapped by the heating wire 110 and a connecting section not wrapped by the heating wire 110. The axial projection of the temperature measuring probe 210 intersects with the heating section of the electrical connection part. The temperature measuring probe 210 is arranged corresponding to the heating section, so that the temperature measuring probe 210 can detect both the water temperature and the temperature of the heating tube 120 to provide a dry-burning alarm, thereby reducing the heat loss of the liquid when the temperature is measured by the temperature measuring probe 210, and improving the accuracy of the temperature measuring probe 210 in detecting the water temperature and the timeliness of the dry-burning alarm. In this embodiment, the power connector 170 includes a first power connector 171 corresponding to the water inlet 141 and a second power connector 172 corresponding to the water outlet 151. The first power connector 171 includes a first heating section 171a and a first connecting section 171b. The second power connector 172 includes a second heating section 172a and a second connecting section 172b. One end of the heating wire 110 is wound around the first heating section 171a, and the other end is wound around the second heating section 172a. One power connector 170 is connected to the positive power line, and the other power connector 170 is connected to the negative power line, so that current can flow through the heating wire 110, so that the heating wire 110 can be energized to generate heat. Figure 6 The straight lines A1 and A2 in the figure represent the end positions of both ends of the first power connection member 171, and the straight line A3 represents the dividing line between the first heating section 171a and the first connecting section 171b. The part of the first power connection member 171 located between the straight lines A1 and A3 constitutes the first heating section 171a, and the part of the first power connection member 171 located between the straight lines A2 and A3 constitutes the first connecting section 171b. The end of the first connecting section 171b away from the first heating section 171a passes through the plug 180 and extends out of the heating tube 120 for power connection. Figure 6The straight lines A4 and A5 in the figure represent the end positions of the two ends of the second power connector 172, and the straight line A6 represents the dividing line between the second heating section 172a and the second connecting section 172b. The part of the second power connector 172 located between the straight lines A4 and A6 constitutes the second heating section 172a, and the part of the second power connector 172 located between the straight lines A5 and A6 constitutes the second connecting section 172b. The end of the second connecting section 172b away from the second heating section 172a passes through the plug 180 and extends out of the heating tube 120 for power connection. In order to ensure the structural stability of the heating wire 110, the first heating section 171a and the second heating section 172a have a certain length, thereby ensuring the length of the heating wire 110 wound around the power connector 170. The axial projection of the temperature probe 210 preferably intersects with the second heating section 172a of the second power connector 172. Figure 6 The straight lines D1 and D2 in FIG. 5 represent the boundary lines of the axial projection of the temperature measuring probe 210 . The straight lines D1 and D2 are located between the straight line A4 and the straight line A6 , so that the axial projection of the temperature measuring probe 210 intersects with the second heating section 172 a of the second power connector 172 .

[0060] The water outlet 151 is arranged close to the temperature measuring probe 210, and at the same time, the water outlet 151 is farther from the outflow end 162 of the heating flow channel 160 than the temperature measuring probe 210. As a preferred solution of this embodiment, the axial projection of the temperature measuring probe 210 is located at the end of the second heating section 172a, so that the temperature of the fully heated liquid can be detected by the temperature measuring probe 210 at the highest temperature point, thereby ensuring the accuracy of the temperature measurement. The axial projection of the water outlet 151 intersects with the second connecting section 172b. On the one hand, the position of the water outlet 151 relative to the power connector 170 is reasonably set, so that the position of the water outlet 151 relative to the heating wire 110 is reasonably set, so that the outside of the heating wire 110 can be wrapped by liquid, so that the heat generated by the heating wire 110 can be transferred to the liquid through the heating tube 120, thereby improving the heating effect of the heating tube 120 on the liquid; on the other hand, bubbles will be generated in the process of the liquid being heated in the heating component 100. The water outlet 151 is corresponding to the second connecting section 172b that is not wrapped by the heating wire 110, so that the liquid flowing through the water outlet 151 is no longer heated, so that the bubbles in the liquid are gradually reduced, and the liquid flow tends to be stable, which helps to ensure the flow stability of the liquid supply.

[0061] The axial projection of the water inlet 141 preferably intersects with the first connection section 171b of the first electrical connector 171, and the axial region of the water outlet 151 preferably intersects with the second connection section 172b of the second electrical connector 172. The distribution positions of the water inlet 141 and the water outlet 151 relative to the heating wire 110 are reasonably set so that the heating channel 160 can completely cover the heating wire 110, fully utilize the heating efficiency of the heating wire 110, and enable the liquid flowing through the heating channel 160 to be fully heated. The water inlet 141 corresponds to the first connection section 171b not entangled by the heating wire 110, so that the liquid flowing in from the water inlet 141 can be fully filled in the liquid inlet end of the heating component 100, and the liquid is prevented from being immediately heated after flowing in from the water inlet 141 to generate bubbles at the liquid inlet end of the heating component 100, thereby preventing the bubbles at the water inlet 141 from disrupting the flow path of the liquid to cause turbulence and causing a dry burning area in the heating channel 160. The water outlet 151 corresponds to the second connecting section 172b not wound by the heating wire 110, so that the liquid heated by the heating tube 120 is converted from a heated state to a stable flow state, thereby reducing the bubbles mixed in the liquid flowing out of the water outlet 141, ensuring the liquid supply flow, thereby ensuring the cleaning effect. Specifically, Figure 6 The straight lines B1 and B2 in the figure represent the boundary lines of the axial projection of the water inlet 141, and the straight lines B3 and B4 represent the boundary lines of the axial projection of the water outlet 151. The straight lines B1 and B2 are located between the straight lines A2 and A3 so that the axial projection of the water inlet 141 intersects with the first connecting section 171b, and the straight lines B3 and B4 are located between the straight lines A5 and A6 so that the axial projection of the water outlet 151 intersects with the second connecting section 172b. As an alternative to this embodiment, at least part of the axial projection of the water inlet 141 may intersect with the first heating section 171a, or at least part of the axial projection of the water outlet 151 may intersect with the second heating section 172a.

[0062] As a preferred solution of this embodiment, buffer platforms are provided at both axial ends of the water pipe housing 130. The buffer platforms protrude outwards and the bottom surface is a plane parallel to the axial direction of the heating tube 120. The water inlet 141 and the water outlet 151 are provided at one end of the buffer platform away from the heating flow channel 160. Specifically, the axial ends of the water pipe housing 130 are respectively provided with an outwardly protruding water inlet buffer platform 131 and a water outlet buffer platform 132. The water inlet buffer platform 131 has a straight first bottom surface 131a, and the water outlet buffer platform 132 has a straight second bottom surface 132a. The first bottom surface 131a and the second bottom surface 132a are both parallel to the axial direction of the heating tube 120. Preferably, the first bottom surface 131a and the second bottom surface 132a are parallel to each other, that is, the protruding directions of the water inlet buffer platform 131 and the water outlet buffer platform 132 relative to the water pipe housing 130 are consistent. As another implementation method of this embodiment, the protruding directions of the water inlet buffer platform 131 and the water outlet buffer platform 132 relative to the water pipe shell 130 may also be inconsistent, such as the water inlet buffer platform 131 is tangent to the water inlet end 161 of the heating flow channel, and the water outlet buffer platform 132 is tangent to the water outlet end 162 of the heating flow channel, so that the liquid in the water inlet buffer platform 131 can smoothly enter the heating flow channel, and similarly, the liquid in the heating flow channel can smoothly flow out through the water outlet buffer platform 132.

[0063] A water inlet buffer cavity 131b is formed at the water inlet buffer platform 131 and communicates with the inlet end 161 of the heating channel 160. The water inlet pipe 140 is fixed on the water inlet buffer platform 131 and communicates with the water inlet 141 and the water inlet buffer cavity 131b. The axial direction of the water inlet pipe 140 is preferably perpendicular to the axial direction of the water pipe housing 130. The water inlet 141 and the inlet end 161 of the heating channel 160 are respectively communicated with the two ends of the water inlet buffer cavity 131b, that is, the water inlet 141 and the inlet end 161 of the heating channel 160 are staggered in the length direction of the water inlet buffer platform 131, so that the liquid flowing in from the water inlet 141 fully fills the water inlet buffer cavity 131b and then enters the heating channel 160, so that the liquid flows into the heating channel 160 in a full flow state, and then the heating channel 160 can be filled with liquid, avoiding the situation of partial dry burning in the heating channel 160 due to insufficient liquid. As an implementable manner of this embodiment, the water inlet buffer platform 131 is preferably formed by partial expansion of the water pipe housing 130 , and the water inlet pipe 140 can be fixed to the water inlet buffer platform 131 by welding or the like.

[0064] A water outlet buffer cavity 132b is formed at the water outlet buffer platform 132 and is connected to the outflow end 162 of the heating flow channel 160. The water outlet pipe 150 is fixed on the water outlet buffer platform 132 and connects the water outlet 151 to the water outlet buffer cavity 132b. The axial direction of the water outlet pipe 150 is preferably perpendicular to the axial direction of the water pipe shell 130. The water outlet 151 and the outflow end 162 of the heating channel 160 are respectively connected to the two ends of the water outlet buffer cavity 132b, that is, the water outlet 151 and the outflow end 162 of the heating channel 160 are staggered in the length direction of the water outlet buffer platform 132. The liquid flowing out of the heating channel 160 is transformed from a spirally encircling liquid flow to a liquid flowing in a straight line along the water outlet buffer platform 132 after being buffered by the water outlet buffer platform 132, so that the flow direction and flow speed of the liquid tend to be stable. The buffering of the water outlet buffer platform 132 can also eliminate the bubbles mixed in the heated liquid, so that the heated liquid can be discharged from the water outlet 151 in a full flow state, thereby improving the flow stability of the liquid supply. As an implementable method of this embodiment, the water outlet buffer platform 132 is preferably formed by partial bulging of the water pipe shell 130, and the water outlet pipe 150 can be fixed to the water outlet buffer platform 132 by welding or the like.

[0065] As a preferred solution of this embodiment, the temperature measuring component 200 is preferably arranged and installed on the water outlet buffer platform 132, and the end of the temperature measuring probe 210 extends into the water outlet buffer cavity 132b and abuts against the outer wall of the heating tube 120. The water outlet buffer platform 132 is used to provide an installation plane for the water outlet pipe 150 and the temperature measuring component 200, which is conducive to reducing the difficulty of installation of the two. In this embodiment, the axial direction of the temperature measuring component 200 is preferably parallel to the axial direction of the water outlet 151, that is, the axial direction of the temperature measuring component 200 is perpendicular to the axial direction of the heating tube 120. Compared with the water outlet 151, the temperature measuring component 200 is located on the water outlet buffer platform 132 at one end close to the heating flow channel 160, and the temperature measuring component 200 and the water outlet pipe 150 are arranged on the water outlet buffer platform 132 at intervals. Since the temperature measuring probe 210 is usually inconsistent with the flow direction of the liquid, the temperature measuring probe 210 on the liquid flow path has a certain obstruction and bypass effect on the flow of the liquid. The water outlet 151 and the temperature measuring component 200 are arranged at a distance so that the liquid flowing through the temperature measuring probe 210 continues to flow for a distance before flowing out from the water outlet 151, ensuring that there is sufficient liquid between the outflow end 162 of the heating flow channel 160 and the water outlet 151, so that the temperature measuring probe 210 can effectively and fully contact the heated liquid, thereby ensuring the accuracy of the temperature measurement of the heated liquid by the temperature measuring component 200, and ensuring that sufficient liquid can be discharged from the water outlet 151, thereby ensuring the stability of the liquid supply.

[0066] Combination Fig. 9As a preferred solution of this embodiment, the temperature measuring probe 210 is located in the spiral extension area of ​​the heating channel 160, so that the temperature measuring probe 210 can effectively and fully contact the living water liquid flowing out from the outflow end 162 of the heating channel 160, thereby improving the temperature measurement accuracy of the heated liquid by the temperature measuring element 200.

[0067] As a preferred solution of this embodiment, the distance from the bottom surface of the buffer platform to the central axis of the heating component 100 is less than or equal to the distance from the bottom surface of the heating channel 160 to the central axis of the heating component 100. Figure 8 , straight line C represents the central axis of the water pipe shell 130, the heights of the water inlet buffer platform 131 and the water outlet buffer platform 132 protruding relative to the water pipe shell 130 are consistent and the distances to the straight line C are both H1, the distance from the bottom surface of the heating flow channel 160 to the straight line C is H2, H1≤H2, so that the liquid can flow smoothly from the water inlet 141 through the water inlet buffer cavity 131b into the heating flow channel 160, and the liquid flowing through the heating flow channel 160 can also flow smoothly to the water outlet 151 through the water outlet buffer cavity 132b. It can be understood that H1 can be less than H2 or equal to H2. As an alternative to this embodiment, the heights of the water inlet buffer platform 131 and the water outlet buffer platform 132 protruding relative to the water pipe shell 130 can be different, that is, the distances of the water inlet buffer platform 131 and the water outlet buffer platform 132 to the straight line C can be different.

[0068] The length of the water outlet buffer platform 132 is La, and the heating flow channel 160 is spirally coiled and there is a pitch P between two adjacent spirals. As a preferred solution of this embodiment, La>P, and the size relationship between the two is reasonably set to ensure that the water outlet buffer platform 132 has a slow flow effect on the liquid flowing out from the outflow end 162, so that the liquid flowing through the heating flow channel 160 flows out from the water outlet 151 after sufficient slow flow, which is conducive to improving the flow stability of the liquid supply. In this embodiment, the pitch P of the spiral heating flow channel 160 is about 10mm, and the length La of the water outlet buffer platform 132 is about 22mm. As an optional solution of this embodiment, the pitch P of the spiral heating flow channel 160 can also be set to 8mm, 9mm, 10.5mm, 11mm, 12mm and other reasonable sizes, and the length La of the water outlet buffer platform 132 can also be set to 18mm, 19mm, 20mm, 21mm, 22.5mm, 23mm, 24mm and other reasonable sizes.

[0069] As a preferred solution of this embodiment, the length La of the water outlet buffer platform 132 is greater than the length Lb of the water inlet buffer platform 131. Since the liquid flowing in from the water inlet 141 can effectively eliminate the mixed bubbles after a short period of water storage, the length of the water inlet buffer platform 131 is set shorter, so that the liquid flowing in from the water inlet 141 can quickly enter the heating channel 160 to be heated after defoaming. The heated liquid flowing through the heating channel 160 requires a longer buffer path to eliminate the mixed bubbles. The water outlet buffer platform 132 is set longer. The heated liquid first flows through the water outlet buffer platform 132 to fully eliminate the bubbles before being discharged from the water outlet 151, ensuring the flow stability of the liquid supply. The length relationship between the two buffer platforms is reasonably set to ensure the heating effect while ensuring the flow stability of the liquid supply. In addition, the longer water outlet buffer platform 132 can fully meet the installation requirements of the water outlet pipe 150 and the temperature measuring component 200. The larger bottom surface of the water outlet buffer platform 132 facilitates the temperature measuring component 200 to effectively contact the heated liquid, thereby ensuring the accuracy and sensitivity of the temperature measurement.

[0070] The projected length of the water outlet buffer platform 132 corresponding to the second heating section 172a is L1, and the projected length of the water outlet buffer platform 132 corresponding to the connecting section is L2, La=L1+L2 and L2>L1. The distribution of the water outlet buffer platform 132 relative to the second power connector 172 is reasonably set so that the water outlet buffer platform 132 can meet the installation space required by the water outlet pipe 150 and the temperature measuring component 200 while ensuring the length of the heating channel 160, thereby improving the heating effect of the heating pipe 120 on the liquid.

[0071] In order to reasonably control the shape of the heating component 100 while ensuring the heating effect, it is necessary to reasonably set the number of turns of the spiral heating channel 160. As a preferred solution of this embodiment, the spiral heating channel 160 has 3 to 5 turns. Further, the spiral heating channel 160 has 4 turns. As an alternative to this embodiment, the spiral heating channel 160 can also be set to 3 turns, 3.5 turns, 4.5 turns, 5 turns, or other reasonable turns.

[0072] In this embodiment, the outer diameter K of the heating tube 120 is approximately 8 mm to 12 mm, the outer diameter M of the spiral heating channel 160 is approximately 15 mm to 20 mm, the inner diameters of the water inlet 141 and the water outlet 151 are approximately 3 mm to 5 mm, the length N of the heating tube 120 is approximately 80 mm to 96 mm, the flow rate of the heating component 100 is approximately 35 mL / min to 50 mL / min, and the temperature of the liquid after being heated through the heating channel 161 is approximately 80°C to 100°C.

[0073] Combination Fig.10 , Fig.11In this embodiment, the temperature measuring component 200 also includes an insulating sleeve 220 and a fastener 230. The temperature measuring probe 210 is fixed in the insulating sleeve 220 by the fastener 230. The head of the temperature measuring probe 210 extends out of the insulating sleeve 220 and extends into the water pipe shell 130 to abut against the heating pipe 120. Specifically, the insulating sleeve 220 has a stepped hole and a step surface 221 is provided on its inner wall. The outer peripheral wall of the temperature measuring probe 210 is provided with an inner shoulder surface 211 and an outer shoulder surface 212 distributed along the axial interval. The fastener 230 has a screw portion 231 that cooperates with the insulating sleeve 220 and a screw head 232 arranged at one end of the screw portion 231. The temperature measuring component 200 also includes a sealing ring 240. The temperature measuring probe 210 is inserted into the insulating sleeve 220. The screw portion 231 of the fastener 230 is locked with the insulating sleeve 220 through threaded cooperation. The fastener 230 is abutted against the outer shoulder surface 212 to axially position the temperature measuring probe 210. The sealing ring 240 is clamped between the step surface 221 and the inner shoulder surface 211. The screw head 232 of the fastener 230 is located outside the insulating sleeve 220, and a reserved gap ΔG is provided between the screw head 232 and the insulating sleeve 220. The sealing ring 240 ensures the sealing performance between the temperature probe 210 and the insulating sleeve 220, and the reserved gap ΔG ensures that the temperature probe 210 fixed in the insulating sleeve 220 by the fastener 230 is fully in contact with the heating tube 120, thereby avoiding the situation where the temperature probe 210 does not abut against the heating tube 120 due to improper installation caused by manufacturing errors.

[0074] Combination Figure 1 , Figure 2 , Figure 3 This embodiment is described by taking a handheld surface cleaning machine as an example. The surface cleaning device includes a floor brush 20 having an installation cavity 21. The floor brush 20 is provided with a cleaning member 22, a driving motor 23 for driving the cleaning member 22, and the heating assembly 100 described above. The floor brush 20 includes a floor brush body 201 and a front cover 202. The front cover 202 is detachably mounted on the front side of the floor brush body 201 through a snap-fit ​​structure. The driving motor 23 and the heating assembly 100 are respectively arranged on the left and right sides of the floor brush body 201, so that the heating assembly 100 is as far away from the driving motor 23 as possible, reducing the heat transferred from the heating assembly 100 to the driving motor 23, avoiding the driving motor 23 from being heated to generate a large temperature rise during operation, and ensuring the performance stability of the driving motor 23. The driving motor 23 and the heating assembly 100 are respectively arranged on opposite sides of the floor brush 20, which can also better balance the weight of the floor brush 20, so that the floor brush 20 can move forward smoothly during operation. In this embodiment, the floor brush 20 has a central axis surface M with left and right sides, and the driving motor 23 and the heating component 100 are respectively arranged on the left and right sides of the central axis surface M.

[0075] Combination Figure 2 , Figure 4The liquid supply channel 10 is provided with a water pump 24 located upstream of the heating assembly 100. The water pump 24 is provided in the floor brush body 201 and is provided on the same side as the heating assembly 100. The floor brush 20 is provided with a water spraying member 25. The rear side of the water spraying member 25 has an inlet 2501. The inlet 2501 is preferably arranged in the middle of the floor brush body 201. The front side of the water spraying member 25 is provided with a plurality of nozzles 2502 spaced apart in the left and right directions. The water inlet 141 of the heating assembly 100 is connected to the pumping port of the water pump 24 through a water pipe, and the water outlet 151 of the heating assembly 100 is connected to the inlet 2501 of the water spraying member 25 through a water pipe. In order to reasonably shorten the path length of the liquid supply channel 10, the water inlet 141 of the heating component 100 is arranged away from the central axis surface M of the floor brush 20, and the water outlet 151 of the heating component 100 is arranged close to the central axis surface M of the floor brush 20. This can not only reasonably shorten the water path length between the water pump 24 and the water inlet 141, but also reasonably shorten the water path length between the water outlet 151 and the water spray component 25, so that the heated liquid can flow quickly from the heating component 100 to the water spray component 25.

[0076] Combination Fig.12 As a preferred solution of this embodiment, the heating component 100 is preferably placed horizontally in the floor brush body 201, the axial direction of the heating component 100 is roughly parallel to the left-right direction, the water inlet buffer platform 131 and the water outlet buffer platform 132 preferably protrude downward relative to the water pipe shell 130, and accordingly, the water inlet 141 and the water outlet 151 are arranged downward relative to the heating component 100, that is, the water outlet 151 and the water inlet 141 are both located at the bottom of the heating flow channel 160, and the water inlet 141 and the water outlet 151 are in the same direction as the center of gravity of the heating component 100, which can improve the structural stability of the heating component 100 arranged in the floor brush 20. When the liquid flows from the water inlet 141 into the heating channel 160, the liquid needs to overcome gravity to flow upward from the water inlet 141 into the heating channel 160, which plays a certain buffering role when the liquid flows into the heating channel 160, appropriately slowing down the flow rate of the liquid so that the liquid can flow smoothly into the heating channel 160, greatly reducing the turbulent bubbles generated by the fast-flowing liquid impacting the heating tube 120, which is conducive to improving the uniformity of the liquid being heated. When the liquid flows from the heating channel 160 to the water outlet 151, the heated liquid can flow out more easily.

[0077] In this embodiment, when the front cover 202 is installed on the front side of the floor brush body 201, the front cover 202 cooperates with the floor brush body 201 to form an installation cavity 21, and the cleaning member 22 is detachably arranged in the installation cavity 21. The water spraying member 25 is fixed to the front side of the floor brush body 201, and the nozzle 2502 on the front side of the water spraying member 25 is arranged toward the cleaning member 22. The liquid flowing into the water spraying member 25 from the inlet 2501 is sprayed onto the cleaning member 22 through the nozzle 2502.

[0078] As a preferred solution of this embodiment, since the heating component 100 is arranged in the floor brush body 201 and the water outlet 151 is arranged downward, and since the water spray part 25 is arranged at the upper part of the front side of the floor brush body 201, the water outlet 151 of the heating component 100 is arranged lower than the inlet 2501 of the water spray part 25. The liquid flowing out of the water outlet 151 needs to flow upward when flowing toward the inlet 2501 of the water spray part 25, thereby making the liquid flowing from the heating component 100 to the water spray part 25 subject to a certain buffering effect, appropriately slowing down the flow rate of the liquid, so that the liquid can be evenly sprayed from the water spray part 25, avoiding the situation where the water output of each outlet of the water spray part 25 is inconsistent.

[0079] The surface cleaning device of this embodiment further comprises a body 30, a handle bar 301 is provided at the top of the body 30, and the bottom of the body 30 is pivotally connected to the rear side of the floor brush body 201. A detachably mounted clean water tank 40 is provided on the body 30, the beginning of the liquid supply channel 10 is detachably connected to the clean water tank 40, the end of the liquid supply channel 10 is connected to the inlet 2501 of the water spraying member 25, the water pump 24 and the heating assembly 100 are provided on the liquid supply channel 10, and the heating assembly 100 is located downstream of the water pump 24. The liquid in the clean water tank 40 flows to the heating assembly 100 under the pumping action of the water pump 24, and the heating assembly 100 heats the liquid flowing through, and the heated liquid flows to the water spraying member 25 and is finally sprayed onto the cleaning member 22.

[0080] Combination Fig.12 , Fig.13 , since the heating component 100 generates a large amount of heat when it is powered on for heating, based on this, a side heat insulation pad 2601 is provided in the floor brush body 201, which is located at the top and / or bottom of the heating component 100, and the heating component 100 is located in the coverage area of ​​the side heat insulation pad 2601. The side heat insulation pad 2601 can greatly reduce the heat transferred from the heating component 100 to the housing of the floor brush 20, avoid the user being scalded by the high temperature housing, and avoid the housing of the floor brush 20 being easily deformed due to the high temperature. In this embodiment, the housing of the floor brush body 201 includes an upper shell 201a and a lower shell 201b fixed together, and a side heat insulation pad 2601 is provided in the floor brush body 201, which is located at the top of the heating component 100, and the side heat insulation pad 2601 is arranged on the bottom surface of the upper shell 201a, and the heating component 100 is located in the vertical projection range of the side heat insulation pad 2601, so that the heating component 100 can be completely covered by the side heat insulation pad 2601. As an alternative to the present embodiment, a side insulation pad 2601 may be provided at the bottom of the heating component 100 in the floor brush body 201, and the heating component 100 may be located within the vertical projection range of the side insulation pad 2601; of course, two side insulation pads 2601 spaced apart from each other may be provided at the top and bottom of the heating component 100 in the floor brush body 201, and the heating component 100 may be located between the two side insulation pads 2601.

[0081] End surface heat insulation pads 2602 are also provided at both ends of the floor brush body 201 corresponding to the heating assembly 100. The end surface heat insulation pads 2602 are arranged roughly vertically and parallel to the end surface of the heating assembly 100. The combination of the side heat insulation pads 2601 and the end surface heat insulation pads 2602 limits the heat of the heating assembly 100 to a certain spatial range, reduces the heat transferred from the heating assembly 100 to the floor brush body 201, reduces the temperature rise inside the floor brush body 201, and thus reduces the temperature difference between the inside of the floor brush body 201 and the outside air, avoiding the situation where condensation water is easily formed on the inner surface of the floor brush body 201 due to the large temperature difference between the inside and the outside, thereby avoiding the condensation water dripping on the electrical components or power terminals in the floor brush body 201 and causing failures.

[0082] The body 30 is provided with a control module 50 and a battery pack 60, and the battery pack 60 supplies power to the heating wire 110, the water pump 24, the driving motor 23 and other electrical components, and the driving motor 23, the water pump 24, the heating wire 110 and other electrical components are controlled by the control module 50. Other structures of the surface cleaning device can refer to the prior art, for example, the floor brush body 201 is provided with a dirt suction port 27 connected to the installation cavity 21, a scraping member 28 arranged above the dirt suction port 27 and used to scrape the cleaning member 22, and an elastic floor scraper 29 arranged below the dirt suction port 27 and capable of contacting the surface to be cleaned, etc. For another example, the surface cleaning device also includes a dirt suction component, and the dirt suction component includes a sewage bucket 70 and a dirt suction fan and other components. The dirt suction fan provides suction to form a dirt suction airflow from the dirt suction port 27 to the sewage bucket 70, and the dirt at the dirt suction port 27 can flow into the sewage bucket 70 along with the dirt suction airflow to achieve dirt collection. As an optional solution of this embodiment, the start and stop of the heating component 100 can be controlled by the control module 50 according to preset instructions, or can be controlled manually by the user.

[0083] When the surface cleaning device is working, the driving motor 23 drives the cleaning member 22 to rotate and wipe the ground, and the heating component 100 heats the liquid flowing through it. The heated liquid is sprayed onto the cleaning member 22 through the water spraying member 25, and the cleaning member 22 absorbs the liquid and wets it to wet the ground. Since the liquid is heated, the temperature of the cleaning member 22 after absorbing the liquid is relatively high, so that the cleaning member 22 can soften the stains before wiping, which can improve the cleaning effect. For example, the temperature of the liquid after being heated by the heating component 100 is about 80°C to 100°C, and the heated liquid is sprayed onto the cleaning member 22 through the water spraying member 25, so that the temperature of the cleaning member 22 after absorbing the liquid is about 45°C to 65°C. The cleaning member 22 wetted by the liquid can effectively wipe stubborn stains.

[0084] The temperature measuring element 200 detects the temperature of the heated liquid and feeds back the temperature signal to the control module 50. The control module 50 controls the heating intensity of the heating wire 110 according to the temperature signal fed back by the temperature measuring element 200, so that the temperature of the heated liquid can be roughly consistent with the preset temperature value.

[0085] When the heating component 100 encounters an abnormal situation such as dry burning, the end of the heating tube 120 near the water outlet 151 rises in temperature rapidly. The control module 50 determines that the heating component 100 has an abnormal situation based on the temperature signal fed back by the temperature measuring component 200, and the control component can command the heating wire 110 to temporarily stop heating.

[0086] As an alternative to the present embodiment, the heating channel 160 of the heating component 100 may also adopt a continuous S-shaped channel structure, and the liquid flows back and forth in the heating channel 160; or, the heating channel 160 of the heating component 100 may also adopt a straight channel structure extending radially, and the liquid flows radially in the heating channel 160.

[0087] Embodiment 2

[0088] Combination Fig.14 In this embodiment, the water spraying member 25 is arranged on the front cover, and a water channel switching structure is arranged between the front cover and the floor brush body. When the front cover is installed on the front side of the floor brush body, the inlet of the water spraying member 25 is connected with the water outlet of the heating component 100 through the water channel switching structure, so that the heated liquid can flow to the water spraying member 25. The nozzle of the water spraying member 25 can be arranged downward toward the cleaning member 22, or it can be arranged forward toward the ground. When the nozzle of the water spraying member 25 is arranged downward toward the cleaning member 22, a nozzle 203 arranged toward the ground can also be arranged on the front cover. The nozzle 203 and the water spraying member 25 are connected in parallel to the water outlet of the heating component 100 through the electromagnetic valve 204. The heated liquid can be sprayed onto the cleaning member 22 through the water spraying member 25, or it can be sprayed onto the ground through the nozzle 203.

[0089] The other structures of the second embodiment are the same as those of the first embodiment and will not be described in detail here.

[0090] In addition to the above preferred embodiments, the present invention has other implementation modes. Those skilled in the art can make various changes and modifications based on the present invention. As long as they do not deviate from the spirit of the present invention, they should all fall within the scope defined in the claims of the present invention.

Claims

1. A surface cleaning device with a heating assembly, comprising a heating assembly, wherein the heating assembly comprises a heating pipe and a water pipe shell, wherein the water pipe shell is sleeved on the outside of the heating pipe to form a heating channel between the inner wall of the water pipe shell and the outer wall of the heating pipe, and the water pipe shell is provided with a water inlet and a water outlet connected to the heating channel, wherein: The heating assembly also includes a temperature measuring component, which is installed on the water pipe shell near the water outlet. The temperature measuring probe of the temperature measuring component extends into the heating flow channel and abuts against the outer wall of the heating pipe.

2. A surface cleaning device with a heating component according to claim 1, characterized in that: The heating tube also includes a heating wire and an electrical connection piece for installing the heating wire. The electrical connection piece includes a heating section wound by the heating wire and a connecting section not wound by the heating wire. The axial projection of the temperature measuring probe intersects with the heating section.

3. A surface cleaning device with a heating component according to claim 2, characterized in that: The axial projection of the temperature measuring probe is arranged at the end of the heating section, and the water outlet is arranged close to the temperature measuring probe and the axial projection of the water outlet is arranged in the connecting section.

4. A surface cleaning device with a heating component according to claim 1, characterized in that: The water pipe shell is also provided with a water outlet buffer platform, which protrudes outward and forms a water outlet buffer cavity connected with the water outlet. The temperature measuring component is arranged on the water outlet buffer platform and the end of the temperature measuring probe extends into the water outlet buffer cavity.

5. A surface cleaning device with a heating component according to claim 4, characterized in that: A spiral heating channel is formed between the water pipe shell and the heating pipe, and the temperature measuring probe is located in the spiral extension area of ​​the heating channel.

6. A surface cleaning device with a heating component according to claim 4, characterized in that: The water outlet buffer platform is also provided with a water outlet pipe with the water outlet, and the water outlet pipe is arranged at one end of the water outlet buffer platform away from the heating flow channel.

7. The surface cleaning device with a heating assembly according to claim 6, characterized in that: The water outlet and the temperature measuring component are arranged at intervals.

8. A surface cleaning device with a heating component according to claim 5, characterized in that: The length of the water outlet buffer platform is La, the pitch of the spiral heating channel is P, La>P; and / or the spiral heating channel has 3 to 5 turns.

9. A surface cleaning device with a heating component according to any one of claims 1 to 8, characterized in that: The temperature measuring component also includes an insulating sleeve and a fastener. The temperature measuring probe is fixed in the insulating sleeve through the fastener. The head of the temperature measuring probe extends out of the insulating sleeve and extends into the heating flow channel.

10. A surface cleaning device with a heating component according to claim 9, characterized in that: The insulating sleeve has an inner wall provided with a step surface, the outer peripheral wall of the temperature measuring probe has an inner shoulder surface and an outer shoulder surface spaced apart along the axial direction, the temperature measuring component also includes a sealing ring clamped between the step surface and the inner shoulder surface, the fastener is locked with the insulating sleeve and contacts with the outer shoulder surface; and / or, the fastener has a screw portion matched with the insulating sleeve and a screw head portion provided at one end of the screw portion, the screw head portion is located outside the insulating sleeve and has a reserved gap between the screw head portion and the insulating sleeve.

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