Water-spray-proof steam cleaner

Abstract

The present invention discloses a water-spray-proof steam cleaner, which belongs to the field of household appliances and includes a main body housing, a heater installed in the main body housing, a water tank, and a handle assembly connected to the main body housing and capable of spraying steam. The main body housing also includes an internal circulation system, wherein the handle assembly includes a reversing valve and a trigger. The internal circulation system includes: a steam pipe connected between the heater and the reversing valve, a return pipe connected between the water tank and the reversing valve, and a water outlet pipe connected between the water tank and the heater. The reversing valve can change the flow direction of the steam under the control of the trigger. The steam cleaner also includes a frequency converter for controlling the heating power of the heater to achieve internal circulation of steam when the steam cleaner is in standby mode. The water-spray-proof steam cleaner of the present invention can maintain internal circulation of steam inside the device during standby mode, avoiding the generation of condensed water, and is convenient and simple to control.

Description

Technical field

[0001] The present invention relates to the field of household appliances, in particular to a water-spray-proof steam cleaning machine. [Background Technology]

[0002] Steam cleaners use high-temperature, high-pressure steam to clean floors, windows, clothing, range hoods, air conditioners, microwave ovens, and sanitary ware, sterilizing surfaces and removing dust and bacteria. This is environmentally friendly and hygienic, with virtually zero damage to the items being cleaned. Existing steam cleaners, when temporarily out of use, stop heating their internal heaters, causing the steam to cool to water. When used again, the steam sprayed out can be mixed with condensed water, causing inconvenience to the user. This problem could be solved by maintaining internal steam circulation within the cleaner during standby. To support this internal steam circulation, a specialized piping system and heating device would be required. [Summary of the invention]

[0003] The technical problem to be solved by the present invention is to overcome the deficiencies of the prior art and propose a water-spray-proof steam cleaning machine, which can maintain steam circulation inside the equipment during standby, avoid the generation of condensed water, and is convenient and simple to control.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0005] A water-spray-proof steam cleaner comprises a main body housing, a heater installed in the main body housing, a water tank, and a handle assembly connected to the main body housing and capable of spraying steam. The steam cleaner also comprises an internal circulation system, wherein the handle assembly comprises a reversing valve and a trigger. The internal circulation system comprises: a steam pipe connected between the heater and the reversing valve, a return pipe connected between the water tank and the reversing valve, and a water outlet pipe connected between the water tank and the heater. The reversing valve can change the flow direction of the steam under the control of the trigger. The steam cleaner also comprises a frequency converter for controlling the heating power of the heater to achieve internal circulation of steam when the steam cleaner is in standby mode.

[0006] After the trigger is pulled, the water outlet pipe transfers the water in the water tank to the heater, and the heater heats the water into steam. The steam is sprayed out from the handle assembly along the steam pipe and can be used for cleaning and disinfection. This is the working state of the anti-water spraying steam cleaner. After the trigger is released, the steam cleaner enters the standby state, and the heater keeps heating to generate steam to maintain steam circulation inside the equipment. At this time, the steam in the steam pipe enters the return pipe, and under the impetus of the continuously generated steam, steam is maintained to flow in the steam pipe and the return pipe to prevent the steam from cooling into water, thereby solving the problem that the steam in the pipe of the steam cleaner cools into water during the standby process and condensed water will be sprayed out after re-entering the working state, thereby increasing the user experience. The reversing valve can control the flow direction of the steam to achieve normal steam spraying and steam circulation inside the equipment. The frequency converter can change the power of the heater to adjust the speed of steam generation, and can reduce the heating power, reduce the steam flow, and reduce power consumption when the steam circulates inside the steam.

[0007] Furthermore, the reversing valve includes a valve body, a valve core, a first valve chamber and a second valve chamber that are connected to each other, the steam pipe and the return pipe are connected to the first valve chamber, one end of the valve core extends out of the valve body and maintains contact with the trigger, and pulling the trigger can control the movement of the valve core to change the flow direction of steam in the reversing valve. The reversing valve changes the flow direction of steam in different working states to maintain steam flow inside the equipment and prevent the generation of condensed water. The movement of the valve core is controlled by the trigger, that is, the flow direction of steam is achieved by pulling the trigger. When the trigger is pulled, the steam cleaner can spray steam for sterilization, disinfection, and cleaning. After releasing the trigger, the steam flow direction changes to prevent the generation of condensed water. The control method is simple and convenient, and the user has a good user experience.

[0008] Furthermore, the valve core is provided with sealing rings a, b, and c. The valve core cooperates with the first valve cavity through the sealing rings to maintain communication between the steam pipe and the second valve cavity when the steam cleaner is in operation, and to maintain communication between the steam pipe and the return pipe when the steam cleaner is in standby mode. Movement of the valve core simultaneously drives movement of the three sealing rings, thereby controlling the direction of steam flow within the valve body. Controlling the steam flow direction requires only pushing a trigger to control the movement of the valve core, making it simple and convenient to use, enhancing the user experience.

[0009] Furthermore, a capillary tube connected to the return pipe is provided in the water tank. Steam can be transferred into the capillary tube through the return pipe and then into the water in the water tank. The capillary tube in contact with the water can transfer the heat of the steam to the water, thereby recovering the heat of the steam and increasing the temperature of the water in the water tank. The heater can more easily heat the water into steam, reducing energy consumption and shortening the time to generate steam. Within the same heating time, the generated steam has a higher heat content and a better sterilization and disinfection effect.

[0010] Furthermore, the capillary tube is in a spiral shape or a serpentine shape. The total length of the capillary tube in a spiral or serpentine shape is longer, and the contact area with the water is larger. When the steam is transmitted, the heat exchange can be completed better and more fully, thereby increasing efficiency.

[0011] Furthermore, the heater includes a heating pipe and a water pipe that fit together. The water pipe has two interfaces in the vertical direction, the water outlet pipe is connected to the lower interface, and the steam pipe is connected to the upper interface. The heating pipe can generate heat and transfer the heat to the water pipe by fitting with the water pipe, which can heat the water in the water pipe. The space in the water pipe is limited. Under the action of high heat, the internal pressure will increase, and higher temperature steam can be generated, which enhances the cleaning ability of the steam cleaner. Since the water flow in the pipe is small, the heating time is also short. At the same time, when water flows into the lower interface of the water pipe, it can flow upward along the pipe and complete heating during the flow process. Moreover, the steam generated during the heating process can flow upward along the pipe and out from the upper interface to ensure that steam can be generated stably and continuously. If water is passed through the upper interface, the water will flow rapidly downward along the pipe, unable to be fully heated, and the generated steam will also be difficult to eject from the lower interface. In addition, the heating method of the water pipe and the heating pipe does not require high sealing requirements, and only requires that the interface of the water pipe is firm and stable.

[0012] Furthermore, the heating pipe and the water pipe are coiled into a spiral and stacked with each other at intervals; or, the heating pipe and the water pipe are coiled into a spiral, wherein the heating pipe is coiled outside the water pipe or the water pipe is coiled outside the heating pipe; or, one of the heating pipe and the water pipe is wrapped around the other pipe.

[0013] The water flow in the water pipe can continuously absorb the heat generated by the heating pipe during the flow process. The spiral water pipe and the heating pipe are long, so they can ensure sufficient heating to generate steam. The two are stacked on each other, so the contact area between the water pipe and the heating pipe is large, that is, the water flow is heated more evenly, the steam is generated faster, and the utilization rate of the heat generated by the heating pipe is higher.

[0014] When the water pipe is wrapped around the outside of the heating tube, it can prevent the temperature of the heating tube from being transferred to the main unit housing. At the same time, the heat generated will be continuously and evenly radiated on the water pipe, stably heating the water flow. When the heating tube is wrapped around the outside of the water pipe, the water pipe can not only obtain heat through contact with the heating tube, but also the heat generated by the heating tube will radiate inward. Although the heat will also radiate outward, due to the spiral shape of the heating tube, the radiation outward is diffused and the radiation inward is concentrated, so the water flow in the water pipe can absorb more heat radiation.

[0015] When the heating tube is wrapped around the outside of the water pipe, the contact area between the water pipe and the heating tube is large, and the water inside the water pipe can be heated to generate steam more quickly. After just turning on the power, the handle assembly can quickly spray out steam after pressing the trigger, and the waiting time for heating is extremely short; when the water pipe is wrapped around the outside of the heating tube, the utilization rate of the heat of the heating tube can reach the maximum, preventing excessive heat dissipation and improving energy utilization.

[0016] Furthermore, when the steam cleaner is in operation, the heating tube maintains a first power, and when the steam cleaner is in standby mode, the heating tube maintains a second power, which is lower than the first power. When the first power is higher, the heating tube generates a higher temperature, heating the water faster, and thus generating a larger and faster steam flow rate, meeting usage requirements. During standby mode, the first power is reduced to the second power, reducing the steam flow rate to maintain only steam flow within the steam cleaner, preventing condensation and reducing energy consumption during standby mode.

[0017] Furthermore, the variable frequency switch includes a microswitch and a control panel that detects the triggering state of the microswitch. When the trigger is pulled, the microswitch is triggered, and the steam cleaner enters an operating state. When the trigger is released, the microswitch stops triggering, and the steam cleaner enters a standby state, maintaining steam circulation within the device. The microswitch and the control panel act as a sensor. Pulling the trigger activates the microswitch, and releasing the trigger deactivates the microswitch, thereby controlling the state of the steam cleaner and the operating power of the heating tube. The microswitch is highly precise, low-cost, and can flexibly control steam flow in different states.

[0018] These features and advantages of the present invention will be disclosed in detail in the following specific embodiments and drawings.

Brief Description of the Drawings

[0019] The present invention will be further described below with reference to the accompanying drawings:

[0020] Figure 1 Schematic diagram of the structure of a steam cleaning machine in an embodiment of the present invention;

[0021] Figure 2 Schematic diagram of the internal structure of a steam cleaning machine according to an embodiment of the present invention;

[0022] Figure 3 Schematic diagram of steam flow when the steam cleaner is in standby mode according to an embodiment of the present invention;

[0023] Figure 4 Schematic diagram of steam flow when the steam cleaning machine is working in an embodiment of the present invention;

[0024] Figure 5 This is a schematic structural diagram of a water tank in an embodiment of the present invention;

[0025] Figure 6 A schematic structural diagram of a heater according to an embodiment of the present invention;

[0026] Figure 7 Schematic diagram of the internal structure of the heater in an embodiment of the present invention;

[0027] Figure 8 This is a schematic structural diagram of the water pipe and the heating pipe in the fourth embodiment of the present invention;

[0028] Figure 9 This is a schematic structural diagram of a handle assembly in an embodiment of the present invention;

[0029] Figure 10 Schematic diagram of the structure of the reversing valve of the steam cleaning machine in standby mode according to an embodiment of the present invention;

[0030] Figure 11 Schematic diagram of the structure of the reversing valve when the steam cleaning machine is working in an embodiment of the present invention.

[0031] Reference numerals:

[0032] Host housing 100;

[0033] Heater 200, heating pipe 210, water pipe 220, interface 230;

[0034] Water tank 300;

[0035] Handle assembly 400, trigger 410, handle housing 420, micro switch 430, control board 440;

[0036] Reversing valve 500, valve body 510, valve core 520, first valve chamber 530, second valve chamber 540, spring 550, sealing ring a561, sealing ring b562, sealing ring c563;

[0037] Steam pipe 610 , return pipe 620 , water outlet pipe 630 , and capillary tube 640 . [Specific implementation method]

[0038] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention. However, the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the implementation manner, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0039] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships 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 or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0040] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the number of the technical features being referred to. Thus, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "plurality" means two or more, unless otherwise explicitly specified.

[0041] In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "connect," "fixed," etc. should be understood broadly. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; or internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0042] In the present invention, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first and second features being in direct contact, or may include the first and second features being in contact not directly but through another feature between them. Furthermore, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may simply mean that the first feature is higher in level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may simply mean that the first feature is lower in level than the second feature.

[0043] Example 1

[0044] Reference Figure 1 and 2The present invention proposes a water-spray-proof steam cleaner, which includes a main housing 100, a heater 200 installed in the main housing 100, a water tank 300, and a handle assembly 400 connected to the main housing 100 and capable of spraying steam. It also includes an internal circulation system, wherein the handle assembly 400 includes a reversing valve 500 and a trigger 410. The internal circulation system includes: a steam pipe 610 connected between the heater 200 and the reversing valve 500, a return pipe 620 connected between the water tank 300 and the reversing valve 500, and a water outlet pipe 630 connected between the water tank 300 and the heater 200. The reversing valve 500 can change the flow direction of steam under the control of the trigger 410. The steam cleaner also includes a frequency converter for controlling the heating power of the heater 200 to realize internal circulation of steam when the steam cleaner is in standby state.

[0045] Reference Figure 3 and 4 After the trigger 410 is pressed, the water outlet pipe 630 transmits the water in the water tank 300 to the heater 200. The heater 200 heats the water into steam. The steam is ejected from the handle assembly 400 along the steam pipe 610 and can be used for cleaning and disinfection. This is the working state of the anti-spray steam cleaner ( Figure 4 The arrow below the middle water outlet pipe 630 is the flow direction of water, the arrow outside the handle assembly 400 and the steam pipe 610 is the flow direction of steam, and the arrow at the trigger 410 is the direction in which it is pulled). After releasing the trigger 410, the steam cleaner enters the standby state, and the heater 200 keeps heating to generate steam to keep the steam circulating inside the device. At this time, the steam in the steam pipe 610 enters the return pipe 620, and under the impetus of the continuously generated steam, steam is kept flowing in the steam pipe 610 and the return pipe 620 to prevent the steam from cooling into water, thereby solving the problem that the steam in the pipe of the steam cleaner cools into water during the standby process and condensed water will be sprayed out after re-entering the working state, thereby improving the user experience. The reversing valve 500 can control the flow direction of steam to achieve normal steam spraying and steam circulation inside the device. The frequency converter can change the power of the heater 200 to adjust the speed of steam generation, and can reduce the heating power, reduce the steam flow rate, and reduce power consumption when the steam circulates inside the steam.

[0046] Reference Figure 3 ( Figure 3(Except for the arrow in the upper right corner of the water tank 300, which indicates the direction of water flow, the remaining arrows indicate the direction of steam flow.) The circulation process within the steam cleaner is as follows: the water in the water tank 300 is transferred from the outlet pipe 630 to the heater 200, where it is heated to generate steam. The steam then flows along the steam pipe 610 into the reversing valve 500. The reversing valve 500 changes the direction of the steam flow, directing it into the return pipe 620, from which it then flows back into the water tank 300. This maintains the flow of steam within the cleaner's internal pipes, preventing the formation of condensed water.

[0047] In addition, the steam in the internal circulation process contains a large amount of heat, which should be effectively utilized to avoid waste. For this purpose, a thin tube 640 connected to the return pipe 620 is provided in the water tank 300. Figure 5 The steam can be transmitted into the capillary 640 through the return pipe 620, and then into the water in the water tank 300 from the capillary 640. The capillary 640 in contact with the water can transfer the heat of the steam to the water, thereby recovering the heat of the steam and increasing the temperature of the water in the water tank 300. The heater 200 can heat the water into water vapor more easily, reducing energy consumption and shortening the time to generate steam. Within the same heating time, the steam generated has higher heat and better sterilization and disinfection effect.

[0048] In order to improve the heat exchange rate, the capillary tube 640 is set to a spiral shape, which increases the length of the capillary tube 640 and the contact area with water. Therefore, during the transmission of steam, the heat exchange can be better and fully completed, thereby increasing efficiency. The material of the capillary tube 640 is brass, which has good thermal conductivity and can better carry out heat exchange. Setting the capillary tube 640 to a serpentine shape can also achieve the same technical effect.

[0049] Example 2

[0050] This embodiment specifically describes the structure of the heater 200 based on the first embodiment. Specifically:

[0051] In the prior art, the heating device of the steam cleaning machine is generally arranged in the water tank. The principle is similar to that of a pressure cooker. The steam is generated slowly, the flow rate is low, and the air tightness requirement is extremely high.

[0052] In the present invention, the heater 200 includes a heating tube 210 and a water tube 220 that are attached to each other. Figure 6 and 7The water pipe 220 is provided with two interfaces 230 in the vertical direction. The water outlet pipe 630 is connected to the lower interface 230, and the steam pipe 610 is connected to the upper interface 230. The heating pipe 210 can generate heat and transfer the heat to the water pipe 220 by fitting with the water pipe 220, which can heat the water in the water pipe 220. The space in the water pipe 220 is limited. Under the action of high heat, the internal pressure will increase, and higher temperature steam can be generated, which enhances the cleaning ability of the steam cleaner. Since the water flow in the pipe is small, the heating time is also short.

[0053] When water flows in from the lower interface 230 of the water pipe 220, it can flow upward along the pipe and be heated during the flow process. Moreover, the steam generated during the heating process can flow upward along the pipe and out from the upper interface 230 to ensure that steam can be generated stably and continuously. If water is passed through the upper interface 230, the water will flow rapidly downward along the pipe and cannot be fully heated, and the generated steam will also be difficult to spray out from the lower interface 230.

[0054] The heating method through the water pipe 220 and the heating pipe 210 does not require high sealing, and the interface 230 of the water pipe 220 only needs to be firm and stable.

[0055] The power of the heating tube 210 is different when the steam cleaner is in working state and in standby state. When the steam cleaner is in working state, the heating tube 210 maintains a first power, and when the steam cleaner is in standby state, the heating tube 210 maintains a second power, and the second power is less than the first power; in addition, the heater 200 also includes an electromagnetic pump (not marked in the figure), which is used to promote the flow of water in the water pipe 220. The flow rate of water supplied to the water pipe 220 by the electromagnetic pump is also different when the steam cleaner is in working state and in standby state. When the steam cleaner is in working state, the electromagnetic pump maintains the water flow in the water pipe 220 at a first flow rate, and when the steam cleaner is in standby state, the electromagnetic pump maintains the water flow in the water pipe 220 at a second flow rate, and the first flow rate is greater than the second flow rate.

[0056] The first power is higher, and the temperature generated by the heating tube 210 is higher, and the water is heated faster, so the steam flow generated will also be larger and faster to meet the use requirements. At this time, the water supply of the electromagnetic pump is also maintained at the first flow, so that the consumed water flow can be replenished in time; when the steam cleaner is in standby mode, the first power is reduced to the second power, the temperature generated by the heating tube 210 is reduced, the first flow is reduced to the second flow, and the water supply of the electromagnetic pump is reduced, thereby generating steam with a smaller flow and a slower flow rate, maintaining steam flow inside the steam cleaner, preventing the generation of condensed water, and reducing energy consumption during standby mode.

[0057] Example 3

[0058] This embodiment proposes the structure of the heating pipe 210 and the water pipe 220 based on the second embodiment. Figure 7 The heating tube 210 and the water tube 220 are coiled into a spiral shape. The water flow in the water tube 220 can continuously absorb the heat generated by the heating tube 210 during the flow process. The spiral water tube 220 and the heating tube 210 are long, so sufficient heating can be guaranteed to generate steam. The water tube 220 is wrapped around the outside of the heating tube 210 to prevent the temperature of the heating tube 210 from being transferred to the main unit housing 100. At the same time, the heat generated will also be continuously and evenly radiated on the water tube 220, stably heating the water flow.

[0059] Of course, the heating tube 210 can also be wrapped around the water pipe 220. The water pipe 220 can not only obtain heat through contact with the heating tube 210, but the heat generated by the heating tube 210 will also radiate inward. Although the heat will also radiate outward, since the heating tube 210 is spiral-shaped, the radiation outward is diffused and the radiation inward is concentrated and divergent, and the water flow in the water pipe 220 can absorb more heat radiation.

[0060] Example 4

[0061] Different from the third embodiment, this embodiment proposes two other structures of the heating tube 210 and the water tube 220. Specifically:

[0062] Reference Figure 8 The heating tube 210 and the water tube 220 are spirally coiled and stacked with each other. Unlike the third embodiment, the heating tube 210 and water tube 220 in this embodiment are not as long as those in the third embodiment, but they are stacked together. The contact area between the water tube 220 and the heating tube 210 is larger, which means that the water flow is heated more evenly, steam is generated faster, the heat generated by the heating tube 210 is more efficiently utilized, and less space is occupied.

[0063] Another structure is that one of the heating pipe and the water pipe is wrapped around the other pipe.

[0064] When the heating tube is wrapped around the water pipe, the contact area between the water pipe and the heating tube is large, and the water in the water pipe can be heated to generate steam more quickly. After just turning on the machine, the handle assembly can quickly spray steam after pressing the trigger, and the waiting time for heating is extremely short.

[0065] When the water pipe is wrapped around the outside of the heating pipe, the heat utilization rate of the heating pipe can be maximized, preventing excessive heat dissipation and improving energy utilization.

[0066] Example 5

[0067] This embodiment proposes a structure of a reversing valve 500 based on the first embodiment. Figures 9 to 11 The reversing valve 500 includes a valve body 510, a valve core 520, a first valve chamber 530 and a second valve chamber 540 that are connected to each other, the steam pipe 610 and the return pipe 620 are connected to the first valve chamber 530, one end of the valve core 520 extends out of the valve body 510 and maintains contact with the trigger 410, wherein one end of the second valve chamber 540 is connected to the first valve chamber 530, and the other end is open for spraying steam.

[0068] The valve core 520 is located in the first valve chamber 530, one end of which is located in the second valve chamber 540, and the other end extends out of the valve body 510 to maintain contact with the trigger 410. The handle assembly 400 also includes a handle housing 420, and the reversing valve 500 is installed in the handle housing 420. During use, the operator holds the handle housing 420 for use. Part of the trigger 410 is located outside the handle housing 420, and the other part is located inside the housing. The trigger 410 is connected to the handle housing 420 through a rotating shaft. The valve core 520 and the valve body 510 maintain elastic contact through a spring 550. When the trigger 410 is pressed to push the valve core 520 to move, the spring 550 can accumulate elastic potential energy. After releasing the trigger 410, the elastic potential energy is released to reset the valve core 520.

[0069] The position of the valve core 520 is different, and the steam flow direction in the reversing valve 500 is also different. There are several sealing rings on the valve core 520. The sealing effect between the sealing rings and different parts of the valve cavity can change the steam flow direction, thereby realizing the steam circulation flow inside the equipment and preventing the generation of condensed water. The movement of the valve core 520 is controlled by the trigger 410, that is, the steam flow direction is achieved by pulling the trigger 410. When the trigger 410 is pulled, the steam cleaner can spray steam for sterilization, disinfection and cleaning. After releasing the trigger 410, the steam flow direction changes. The control method is simple and convenient, and users have a better use experience.

[0070] Among them, the sealing ring includes a sealing ring a561, a sealing ring b562 and a sealing ring c563. The sealing ring a561 and the sealing ring b562 are located in the first valve cavity 530, and the sealing ring c563 is located in the second valve cavity 540. The sealing ring a561 can prevent steam from flowing out of the first valve cavity 530 into the handle housing 420. Figure 11 When the steam cleaner is in operation, the sealing ring a561 and the sealing ring b562 are located on both sides of the return pipe 620 to prevent steam from flowing into the return pipe 620. The steam directly enters the second valve chamber 540 from the steam pipe 610 and then sprays out; Figure 10When the steam cleaner is in standby mode, the steam pipe 610 and the return pipe 620 are in circulation, and the sealing ring c563 is located between the connection point between the first valve chamber 530 and the second valve chamber 540, blocking the steam from flowing into the second valve chamber 540, thereby controlling the flow direction of steam in the valve body 510.

[0071] Example 6

[0072] This embodiment specifically describes the structure of the frequency conversion switch. Specifically, the frequency conversion switch is used to detect whether the steam cleaner is in the working state or the standby state, so as to change the heating power of the heating tube 210 and the water flow provided by the electromagnetic pump. Since the flow direction of steam is different in the working state and the standby state, detection can be performed based on this change.

[0073] As a preference, refer to Figure 10 and 11 The frequency conversion switch includes a micro switch 430 and a control board 440. The control board 440 can detect the triggering state of the micro switch 430. The micro switch 430 has high precision and low cost, and can flexibly control the steam flow in different states. The position of the valve core 520 can be controlled by pulling the trigger 410. After pulling the trigger 410, the micro switch 430 can be triggered. After the control board 440 detects that the micro switch 430 is triggered, the heating tube 210 is heated at the first power, and the electromagnetic pump controls the water flow in the water outlet pipe 630 to be the first flow. After the trigger 410 is released, the micro switch 430 stops triggering, the power of the heating tube 210 is reduced to the second power, and the water flow in the water outlet channel also decreases at the same time, maintaining a small flow of steam circulation inside the cleaning machine.

[0074] When the control panel 440 does not detect the trigger signal of the micro switch 430 after a period of time, the steam cleaner stops working to avoid the cleaner being in standby mode and continuously consuming electricity after forgetting to shut down, which also poses certain safety hazards. The time can be controlled within 5 minutes or 10 minutes.

[0075] In addition, whether the cleaning machine is in working state or standby state can be judged by detecting whether there is steam flowing in the return pipe.

[0076] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Those skilled in the art will understand that the present invention includes, but is not limited to, the contents described in the drawings and the above specific embodiments. Any modifications that do not deviate from the functional and structural principles of the present invention are intended to be included within the scope of the claims.

Claims

1. A water-spray-proof steam cleaning machine, comprising a main body housing, a heater installed in the main body housing, a water tank, and a handle assembly connected to the main body housing for spraying steam, characterized in that: The steam cleaner further comprises an internal circulation system, wherein the handle assembly comprises a reversing valve and a trigger, and the internal circulation system comprises: a steam pipe connected between the heater and the reversing valve, a return pipe connected between the water tank and the reversing valve, and a water outlet pipe connected between the water tank and the heater; the reversing valve can change the flow direction of the steam under the control of the trigger; the steam cleaner further comprises a frequency conversion switch for controlling the heating power of the heater; when the steam cleaner enters a standby state, the heater keeps heating to generate steam to realize the internal circulation of steam when the steam cleaner is in the standby state.

2. The water-spray-proof steam cleaning machine according to claim 1, characterized in that: The reversing valve includes a valve body, a valve core, a first valve chamber and a second valve chamber connected to each other. The steam pipe and the return pipe are connected to the first valve chamber. One end of the valve core extends out of the valve body and maintains contact with the trigger. Pulling the trigger can control the movement of the valve core to change the flow direction of steam in the reversing valve.

3. The water spray proof steam cleaning machine according to claim 2, characterized in that: The valve core is provided with a sealing ring a, a sealing ring b and a sealing ring c. The valve core cooperates with the first valve cavity through the sealing rings to keep the steam pipe connected with the second valve cavity when the steam cleaner is in the working state, and keeps the steam pipe connected with the return pipe when the steam cleaner is in the standby state.

4. The water-spray-proof steam cleaning machine according to claim 1, characterized in that: A thin tube connected to the return pipe is provided in the water tank.

5. The water spray proof steam cleaning machine according to claim 4, characterized in that: The thin tube is spiral-shaped; or, the thin tube is serpentine-shaped.

6. The water spray proof steam cleaning machine according to claim 1, characterized in that: The heater includes a heating pipe and a water pipe that are fitted together. The water pipe is provided with two interfaces in the vertical direction. The water outlet pipe is connected to the lower interface, and the steam pipe is connected to the upper interface.

7. The water-spray proof steam cleaning machine according to claim 6, characterized in that: The heating pipe and the water pipe are coiled in a spiral and stacked with each other at intervals; or, the heating pipe and the water pipe are coiled in a spiral, wherein the heating pipe is coiled outside the water pipe or the water pipe is coiled outside the heating pipe; or, one of the heating pipe and the water pipe is wrapped around the other pipe.

8. The water spray proof steam cleaning machine according to claim 7, characterized in that: When the steam cleaner is in working state, the heating tube maintains a first power. When the steam cleaner is in standby state, the heating tube maintains a second power, which is lower than the first power.

9. The water-spray proof steam cleaner according to any one of claims 1 to 8, characterized in that: The frequency conversion switch includes a micro switch and a control panel for detecting the triggering state of the micro switch. When the trigger is pulled, the micro switch is triggered, and the steam cleaner enters the working state. When the trigger is released, the micro switch stops triggering, and the steam cleaner enters the standby state, and steam circulation is maintained inside the device.

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