Handheld steam cleaning machine

Abstract

A handheld steam cleaning machine comprises a cleaning machine shell which is provided with an installation cavity, a water injection port and a nozzle connector. The steam generating boiler is provided with a steam generating cavity, a nozzle connecting port and a switch acting port; the switch assembly is connected into the switch acting end; the nozzle assembly is communicated with the steam generating cavity and comprises an inner joint pipe, a steam conveying hose and an outer nozzle pipe, and the inner joint pipe is connected to the nozzle connecting port; the water adding cap component is connected with the steam generation boiler and communicated with the water injection port; the inner end of the outer nozzle pipe is provided with a hemispherical head steering section and a steam spraying section; the hemispherical head steering section is located in the mounting cavity, abuts against the nozzle connector and is clamped with the nozzle connector, and the hemispherical head steering section can rotate relative to the nozzle connector under the external acting force. According to the utility model, the hemispherical head steering section is matched with the nozzle interface, so that the universal rotation adjusting function of the outer nozzle pipe relative to the cleaning machine shell can be realized, and the steam spraying direction can be changed at will.

Description

Technical Field

[0001] The utility model relates to the technical field of cleaning electrical appliances, in particular to a handheld steam cleaning machine. Background Art

[0002] Steam cleaning machine, also known as saturated steam cleaning machine, is a cleaning equipment that uses the high temperature and external high pressure of saturated steam to clean the oil stains and dirt on the surface of parts and vaporize them. It can clean any small gaps and holes, peel off and remove oil stains and residues, and achieve the requirements of high efficiency, water saving, cleanliness, dryness, and low cost, replacing expensive dry ice cleaning. The working principle of the steam cleaning machine is to accelerate the movement speed of the molecules on the dirt surface through the steam generated by high temperature, and to achieve the purpose of eliminating various stubborn stains by destroying the binding force between them, and at the same time completely eliminate various bacteria, mites, microorganisms and pathogens attached to the object. It is equipped with a variety of convenient accessories such as nozzles and brushes, and does not require any environmental protection concept of detergents, and has high efficiency in rapid decontamination and sterilization.

[0003] As people's living standards and quality of life improve, they have higher requirements for the quality of their living environment. A new cleaning tool, a good helper for housewives, steam cleaners came into being. Steam cleaners use high temperature and high pressure steam to clean floors, doors and windows, clothing, range hoods, air conditioners, microwave ovens, and sanitary ware to sterilize surfaces, remove dust and bacteria, and are environmentally friendly and hygienic. They can prevent allergies and eliminate stubborn stains and oil stains. No chemical reagents are required, and there is almost no damage to the cleaning items. While people enjoy a scientific and hygienic environment, they will not cause secondary pollution to the environment.

[0004] Prior art example 1, referring to patent document CN203599129U, relates to a handheld steam spray gun, comprising at least one solution tank, a heating component, and a nozzle, wherein the solution tank is fluidically connected to the nozzle, the solution tank comprises a shell having a liquid injection port, a tank cover is arranged at the liquid injection port, the shell is hollow, the interior of the shell constitutes an inner cavity for containing a cleaning liquid, a portion of the shell constitutes a handle for a user to lift the spray gun, and the handle is a part of the solution tank; by forming the handle directly on the solution tank, the structure of the spray gun is more compact, and the liquid storage capacity of the solution tank can be expanded without changing the overall volume of the spray gun, thereby allowing the steam spray gun to work longer when the solution tank is filled with water.

[0005] Prior art example 2, referring to patent document CN101618385B, relates to a steam cleaning machine, comprising: a steam generator capable of converting water into steam, the steam generator being connected to a steam discharge passage for discharging steam; a liquid storage container for storing detergent, the liquid storage container being connected to a detergent discharge passage for discharging detergent; a steam injection passage is provided on the liquid storage container, one end of the steam injection passage is connected to the interior of the liquid storage container, and the other end is connected to the steam generator or the steam discharge passage, the steam in the steam generator or the steam discharge passage can be injected into the liquid storage container through the steam injection passage, the steam injected into the liquid storage container can increase the pressure of the detergent stored in the liquid storage container, thereby enabling the detergent to obtain power to surge to the outside of the liquid storage container. Therefore, the detergent in the steam cleaning machine does not need to be pre-added with injection power, and when working, it is sufficient to inject the steam in the steam generator into the liquid storage container, which is simple and convenient to operate.

[0006] In summary, the structural technology of Example 1 and Example 2 reflects a common defect of steam cleaning machines, that is, the relative position relationship between the spray group and the shell is fixed, and cannot be rotated or adjusted in angle. In actual cleaning work, some areas are limited by unfavorable factors such as narrow or high and low spaces, and the steam cleaning machine cannot be held straight and used. At this time, the user needs to tilt the shell to change the direction of the nozzle to achieve the cleaning function. However, this tilted use method is, firstly, inconvenient for the user to hold and increases the pressure on the hands; secondly, it will cause the steam boiler to tilt, affecting the efficiency of heating and generating steam, especially when the water level is low, dry burning may occur; thirdly, it affects the effect of steam injection (such as injection distance, range, etc.), resulting in a decrease in cleaning effect; fourthly, in the tilted state, it will cause a large deviation in the effect of the temperature control switch and the safety pressure relief valve. Summary of the invention

[0007] In order to overcome the above-mentioned deficiencies in the prior art, the utility model provides a handheld steam cleaning machine.

[0008] The utility model solves the technical problem by providing a handheld steam cleaning machine comprising:

[0009] A cleaning machine housing having a mounting chamber, wherein the cleaning machine housing has a water injection port and a nozzle interface;

[0010] A steam generating boiler is arranged in the installation chamber, the steam generating boiler has a steam generating chamber, a nozzle connecting port and a switch action port, the nozzle connecting port, the switch connecting port and the water injection port are respectively connected to the steam generating chamber;

[0011] A switch assembly is movably disposed on the cleaning machine housing, and the switch assembly is at least partially connected to the switch action end;

[0012] A nozzle assembly is communicated with the steam generating chamber, the nozzle assembly comprises an inner joint pipe, a steam delivery hose, and an outer nozzle pipe, the inner joint pipe is connected to the nozzle connection port, the outer nozzle pipe at least partially extends out of the cleaning machine housing, and the steam delivery hose is connected between the inner joint pipe and the outer nozzle pipe;

[0013] A water adding cap component, which is connected to the steam generating boiler and communicates with the water injection port;

[0014] The inner end of the outer nozzle tube has an inner hollow hemispherical head turning section and a steam injection section;

[0015] The steam spray section extends out of the cleaning machine housing after passing through the nozzle interface, and the steam delivery hose is connected to the steam spray section and conducted;

[0016] The hemispherical head steering section is located in the installation chamber and abuts against and clamps the nozzle interface, and the hemispherical head steering section can rotate relative to the nozzle interface under external force.

[0017] The preferred structural scheme of the cleaning machine housing is that the cleaning machine housing includes a main housing and a front cover, the main housing is provided with an assembly port, the front cover is detachably connected to the assembly port, and the nozzle interface is provided on the front cover;

[0018] The size of the assembly port is larger than the size of the hemispherical head steering section, and the size of the hemispherical head steering section is larger than the size of the nozzle interface.

[0019] The utility model provides a pressure relief structure scheme. A safety pressure relief valve is arranged in the water adding cap component. At least part of the safety pressure relief valve extends into the steam generating chamber through a water injection port.

[0020] The preferred structural scheme of the switch assembly is that the switch assembly includes an operating switch member, a switch valve stem, a sealing valve core sleeved on the switch valve stem, a transmission member drivingly connected to the operating switch member and the switch valve stem, and a return spring;

[0021] The sealing valve core can block or release the nozzle connection port;

[0022] The return spring acts on the switch valve stem so that the switch valve stem always has a movement tendency to move backward, and the sealing valve core always has a movement tendency to block the nozzle connection port.

[0023] Preferably, the nozzle connection port has a large-diameter port section and a small-diameter port section, the size of the large-diameter port section is larger than the size of the sealing valve core, and the size of the small-diameter port section is smaller than the size of the sealing valve core;

[0024] The sealing valve core is located in the large-diameter port section, and the sealing valve core can abut against the small-diameter port section, so that the small-diameter port section is disconnected from the large-diameter port section;

[0025] The sealing valve core can also be separated from the small-diameter port section so that the small-diameter port section is connected to the large-diameter port section.

[0026] Furthermore, a first sealing ring is sleeved on the switch valve stem, and the first sealing ring abuts against the inner wall of the switch connection port to form a sealing fit.

[0027] The preferred structural scheme of the transmission component is that a rotating shaft is provided on the transmission component, and the transmission component is rotatably connected with the cleaning machine housing through the rotating shaft;

[0028] One end of the transmission member is a driving end, and the other end is a triggering end, and the rotating shaft is located between the driving end and the triggering end;

[0029] The operating switch component can abut against the trigger end to form a transmission match, and the driving end can abut against the switch valve stem to form a transmission match.

[0030] Another safety structure solution of the utility model is that a movable child lock rod is provided on the housing of the cleaning machine, and the child lock rod has a locked position state and an unlocked position state;

[0031] When the child lock rod is in the locked position, the child lock rod can form an interference fit with the operating switch component to block the power transmission between the operating switch component and the transmission component;

[0032] When the child lock lever is located at the unlocking position, the interference between the child lock lever and the operating switch component can be eliminated to restore the power transmission between the operating switch component and the transmission component.

[0033] In some preferred embodiments of the present utility model, an inner isolation shell is further provided in the installation chamber, and the steam generating boiler is located above the inner isolation shell;

[0034] The inner isolation shell has a wire hole, one end of the internal cable is electrically connected to the steam generator boiler after passing through the wire hole, and the other end of the internal cable is connected to the external cable, and the external cable can be electrically connected to the mains;

[0035] A thermostat is arranged at the lower end of the steam generating boiler, a temperature indicator light assembly is arranged on the housing of the cleaning machine, the thermostat is communicatively connected with the temperature indicator light assembly, and the internal cables are electrically connected with the thermostat and the temperature indicator light assembly respectively.

[0036] The functional expansion structural solution for the handheld steam cleaning machine is that a joint groove and a plurality of second sealing rings are provided on the outer wall of the steam spray section, and the joint groove can form a detachable connection with the nozzle attachment.

[0037] The beneficial effects of the utility model are:

[0038] 1. The cooperation between the hemispherical head steering section and the nozzle interface can realize the universal rotation adjustment function of the outer nozzle tube relative to the cleaning machine housing, so that the direction of steam spraying can be changed arbitrarily without tilting the cleaning machine housing, thereby ensuring a good steam spraying effect (such as spraying distance, range, etc.).

[0039] 2. When in use, the steam generating boiler can be kept from tilting, thus ensuring the efficiency of heating and generating steam and avoiding dry burning when the water level is low.

[0040] 3. When in use, the steam generating boiler can be kept from tilting, and the effects of the temperature control switch and the safety pressure relief valve are stable and reliable.

[0041] 4. It has a dual safety structure consisting of a safety pressure relief valve and a child lock rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 It is a structural schematic diagram of the utility model.

[0043] Figure 2 This is a schematic diagram of the disassembly and assembly of the nozzle assembly.

[0044] Figure 3 It is a schematic diagram of the structure of the nozzle assembly of the utility model spraying straight forward.

[0045] Figure 4 It is a schematic diagram of the structure of the nozzle assembly of the utility model spraying obliquely downward.

[0046] Figure 5 It is a structural schematic diagram of the nozzle assembly of the utility model spraying obliquely to the left.

[0047] Figure 6 It is a cross-sectional view of the utility model.

[0048] Figure 7 It is a partial structural schematic diagram of the switch component (when not turned on) and the nozzle connection port.

[0049] Figure 8It is a partial structural schematic diagram of the switch component (when turned on) and the nozzle connection port.

[0050] Fig. 9 It is an exploded view of the local structure of the utility model.

[0051] Fig.10 It is a schematic diagram of the structure of the nozzle assembly.

[0052] Fig.11 It is a structural diagram of the switch assembly.

[0053] Fig.12 It is a structural schematic diagram of the child lock rod of the utility model being located in the unlocking position.

[0054] In the figure: 1. Washing machine housing; 11. Installation chamber; 12. Water injection port; 14. Handle; 15. Main housing; 151. Assembly port; 16. Front cover; 161. Nozzle interface; 17. Temperature indicator assembly; 2. Steam generator; 21. Steam generator chamber; 22. Nozzle connection port; 221. Large diameter port section; 222. Small diameter port section; 23. Switch action port; 24. Thermostat; 3. Switch assembly; 31. User operating member; 32. Switch valve stem; 33. Sealing Sealing valve core; 331, steam passing gap; 34, transmission component; 341, rotating shaft; 342, driving end; 343, triggering end; 35, reset spring; 36, first sealing ring; 4, nozzle assembly; 41, inner joint pipe; 42, steam transmission hose; 43, outer nozzle pipe; 431, hemispherical head steering section; 432, steam injection section; 4321, joint groove; 4322, second sealing ring; 5, water filling cap component; 51, safety pressure relief valve; 6, inner isolation shell; 61, wire hole; 7, child lock rod. DETAILED DESCRIPTION

[0055] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the embodiments are only specific descriptions of the present invention, and their purpose is to allow those skilled in the art to better understand the technical solution of the present invention, and should not be regarded as limiting the present invention.

[0056] In the description of the present invention, it should be noted that the orientations or positional relationships indicated by terms such as "center", "up", "down", "left", "right", "vertical", "horizontal", "inside" and "outside" are 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, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] Embodiment 1

[0059] Reference Figures 1 to 12 , a handheld steam cleaning machine, comprising:

[0060] A cleaning machine housing 1 having an installation chamber 11, the cleaning machine housing 1 having a water inlet 12 and a nozzle interface 161, and a handle 14 for the user to hold;

[0061] A steam generating boiler 2 is arranged in the installation chamber 11, and the steam generating boiler 2 has a steam generating chamber 21, a nozzle connecting port 22 and a switch action port 23, and the nozzle connecting port 22, the switch connecting port and the water injection port 12 are respectively connected to the steam generating chamber 21;

[0062] A switch assembly 3, which is movably arranged on the cleaning machine housing 1, and the switch assembly 3 is at least partially connected to the switch action end;

[0063] The nozzle assembly 4 is communicated with the steam generating chamber 21, and the nozzle assembly 4 includes an inner joint pipe 41, a steam delivery hose 42, and an outer nozzle pipe 43. The inner joint pipe 41 is connected to the nozzle connection port 22, and the outer nozzle pipe 43 at least partially extends out of the cleaning machine housing 1, and the steam delivery hose 42 is connected between the inner joint pipe 41 and the outer nozzle pipe 43;

[0064] A water adding cap member 5, which is connected to the steam generating boiler 2 and communicates with the water injection port 12;

[0065] It should be noted that the main difference from the prior art structure is that the inner end of the outer nozzle tube 43 has a hemispherical head steering section 431 and a steam spray section 432 with a hollow interior; the steam spray section 432 extends out of the cleaning machine housing 1 after passing through the nozzle interface 161, and the steam delivery hose 42 is connected to and communicates with the steam spray section 432; the hemispherical head steering section 431 is located in the installation chamber 11 and abuts against and clamps the nozzle interface 161, and the hemispherical head steering section 431 can rotate relative to the nozzle interface 161 under external force. Through the cooperation between the hemispherical head steering section 431 and the nozzle interface 161, the universal rotation adjustment function of the outer nozzle tube 43 relative to the cleaning machine housing 1 can be realized, so that the direction of steam spraying can be arbitrarily changed without tilting the cleaning machine housing 1.

[0066] The above content is the basic structural scheme of the utility model, and its working principle is: the user first opens the water adding cap component 5 to inject water into the steam generating chamber 21 through the water injection port 12, and then closes the water adding cap component 5; according to the needs of the cleaning area, the nozzle assembly 4 is controlled to rotate relative to the cleaning machine housing 1 to achieve the function of switching the spray angle; then the power is turned on to start, and the steam generating boiler 2 heats the liquid water to convert it into steam; then the user operates the switch assembly 3 to connect the nozzle assembly 4 and the steam generating chamber 21, so that the steam passes through the nozzle connection port 22, the inner joint pipe 41, and the steam transmission hose 42 in turn, and finally is sprayed to the outside from the outer nozzle pipe 43.

[0067] The preferred structural scheme of the cleaning machine housing 1 is as follows: Figure 2 The cleaning machine housing 1 includes a main housing 15 and a front cover 16. The main housing 15 is provided with an assembly port 151. The front cover 16 is detachably connected to the assembly port 151. The nozzle interface 161 is provided on the front cover 16. The size of the assembly port 151 is larger than the size of the hemispherical head steering section 431, and the size of the hemispherical head steering section 431 is larger than the size of the nozzle interface 161. Therefore, in the production process, the hemispherical head steering section 431 is first installed into the installation chamber 11 through the assembly port 151, and then the front cover 16 is assembled with the main housing 15, so that the front cover 16 plays a limiting role on the hemispherical head steering section 431 to prevent the outer nozzle tube 43 from being separated from the cleaning machine housing 1.

[0068] Preferably, refer to Fig. 9, the installation chamber 11 is also provided with an inner isolation shell 6, and the steam generating boiler 2 is located above the inner isolation shell 6; the inner isolation shell 6 can play a role in physical space isolation, secondly, it can play a role in temperature insulation, reducing the heat transfer to the bottom of the inner isolation shell 6, and thirdly, it can protect components such as cables. More specifically, the inner isolation shell 6 has a wire hole 61, one end of the internal cable is electrically connected to the steam generating boiler 2 after passing through the wire hole 61, and the other end of the internal cable is connected to the external cable, and the external cable can be electrically connected to the mains; the lower end of the steam generating boiler 2 is provided with a thermostat 24, and the cleaning machine housing 1 is provided with a temperature indicator assembly 17, the thermostat 24 is communicatively connected with the temperature indicator assembly 17, and the internal cable is electrically connected to the thermostat 24 and the temperature indicator assembly 17 respectively. The temperature of the steam generating boiler 2 is monitored by the thermostat 24, and the temperature signal is fed back to the temperature indicator, so that the user can judge the operating status of the steam generating boiler 2 by the light of the temperature indicator.

[0069] In the above description, the internal cables and the external cables are common components and therefore are not shown in the accompanying drawings.

[0070] The functional expansion structural scheme of the handheld steam cleaning machine is that a joint groove 4321 and a plurality of second sealing rings 4322 are provided on the outer wall of the steam spray section 432, and the joint groove 4321 can form a detachable connection with the nozzle attachment. Among them, the nozzle attachment is various parts that can be replaced with each other and have different shapes, and no special limitation is made here. When the steam spray section 432 is connected to the nozzle attachment, it can provide more abundant steam spraying functions, and the second sealing ring 4322 can play a sealing role between the steam spray section 432 and the nozzle attachment to prevent steam escape and leakage, and ensure the normal use of the steam cleaning machine.

[0071] Embodiment 2

[0072] Based on the structure of the first embodiment, this embodiment provides a preferred composition scheme for the switch assembly 3, specifically: Figure 6 to Figure 8 , Fig.11 The switch assembly 3 includes an operating switch component, a switch valve stem 32, a sealing valve core 33 sleeved on the switch valve stem 32, a transmission component 34 transmission-connected to the operating switch component and the switch valve stem 32, and a return spring 35; the sealing valve core 33 can block or release the nozzle connection port 22; the return spring 35 acts on the switch valve stem 32 so that the switch valve stem 32 always has a movement tendency to move backward, and the sealing valve core 33 always has a movement tendency to block the nozzle connection port 22.

[0073] When the operating switch member is subjected to an operating force, and the operating force is greater than the elastic force of the return spring 35, the operating switch member acts on the switch valve stem 32 through the transmission member 34, and the switch valve stem 32 is displaced so that a steam passing gap 331 is formed between the sealing valve core 33 and the nozzle connection port 22, that is, at this time, the sealing valve core 33 releases the nozzle connection port 22, and steam can enter the nozzle assembly 4 through the nozzle connection port 22, and at the same time, the return spring 35 contracts to accumulate elastic return force;

[0074] When the operating switch component is released, the elastic restoring force of the restoring spring 35 acts on the switch valve stem 32 to move backward. At this time, the sealing valve core 33 is reset and re-blocks the nozzle connecting port 22, and steam will not be able to enter the nozzle assembly 4 through the nozzle connecting port 22.

[0075] Preferably, the nozzle connection port 22 has a large-diameter port section 221 and a small-diameter port section 222, wherein the size of the large-diameter port section 221 is larger than the size of the sealing valve core 33, and the size of the small-diameter port section 222 is smaller than the size of the sealing valve core 33. Thus, when the operating switch member is subjected to an operating force, the sealing valve core 33 can also be separated from the small-diameter port section 222, so that the small-diameter port section 222 is connected to the large-diameter port section 221; when the operating switch member is released, the sealing valve core 33 is located in the large-diameter port section 221, and the sealing valve core 33 can be offset against the small-diameter port section 222, so that the small-diameter port section 222 is disconnected from the large-diameter port section 221.

[0076] Furthermore, the switch valve stem 32 is also sleeved with a first sealing ring 36, which abuts against the inner wall of the switch connection port to form a sealing fit. The first sealing ring 36 can fill the steam passing gap 331 between the switch valve stem 32 and the switch connection port to prevent steam from escaping from the switch connection port.

[0077] On the other hand, the transmission member 34 is provided with a rotating shaft 341, and the transmission member 34 is rotatably connected with the cleaning machine housing 1 through the rotating shaft 341; one end of the transmission member 34 is a driving end 342, and the other end is a triggering end 343, and the rotating shaft 341 is located between the driving end 342 and the triggering end 343, and the operating switch member can abut against the triggering end 343 and form a transmission match, and the driving end 342 can abut against the switch valve rod 32 and form a transmission match. Therefore, the transmission member 34 has a swing-type transmission function similar to a tilting lever.

[0078] Embodiment 3

[0079] Based on the structure of any of the above embodiments, this embodiment also adds a safety structure to make the user safer and more reliable when using the handheld steam cleaning machine. The specific structure is as follows:

[0080] 1. Pressure relief structure: refer to Figure 6 The water adding cap member 5 is provided with a safety relief valve 51, and the safety relief valve 51 at least partially extends into the steam generating chamber 21 through the water injection port 12. The safety relief valve 51 is a conventional safety device in steam cleaning machine products, which can automatically release pressure under high pressure to prevent the internal pressure of the steam generating chamber 21 from being too high and causing an explosion.

[0081] 2. Child lock structure: A movable child lock rod 7 is provided on the cleaning machine housing 1, and the child lock rod 7 has a locked position state and an unlocked position state;

[0082] Reference Figure 1 , Figure 6 When the child lock rod 7 is in the locked position, the child lock rod 7 can form an interference fit with the operating switch member to block the power transmission between the operating switch member and the transmission member 34;

[0083] Reference Fig.12 When the child lock rod 7 is in the unlocked position, the interference between the child lock rod 7 and the operating switch component can be eliminated to restore the power transmission between the operating switch component and the transmission component 34.

[0084] It is worth noting that other technical solutions of the present invention belong to the prior art and will not be described in detail.

[0085] The above is only a preferred embodiment of the present invention. It should be pointed out that ordinary technicians in this technical field can make several improvements and modifications without departing from the concept of the present invention. These improvements and modifications should also be regarded as the protection scope of the present invention.

Claims

1. A handheld steam cleaning machine, comprising: A cleaning machine housing (1) having a mounting chamber (11), wherein the cleaning machine housing (1) has a water injection port (12) and a nozzle interface (161); A steam generating boiler (2) is arranged in an installation chamber (11), the steam generating boiler (2) comprising a steam generating chamber (21), a nozzle connecting port (22) and a switch action port (23), the nozzle connecting port (22), the switch connecting port and the water injection port (12) being respectively connected to the steam generating chamber (21); A switch assembly (3) is movably arranged on the cleaning machine housing (1), and the switch assembly (3) is at least partially connected to the switch action end; A nozzle assembly (4) is communicated with the steam generating chamber (21), the nozzle assembly (4) comprising an inner joint pipe (41), a steam delivery hose (42), and an outer nozzle pipe (43), the inner joint pipe (41) being connected to the nozzle connection port (22), the outer nozzle pipe (43) at least partially extending outside the cleaning machine housing (1), and the steam delivery hose (42) being connected between the inner joint pipe (41) and the outer nozzle pipe (43); A water adding cap component (5), which is connected to the steam generating boiler (2) and communicates with the water injection port (12); Features: The inner end of the outer nozzle tube (43) has an inner hollow hemispherical head turning section (431) and a steam injection section (432); The steam spray section (432) extends out of the cleaning machine housing (1) after passing through the nozzle interface (161), and the steam delivery hose (42) is connected to and communicated with the steam spray section (432); The hemispherical head steering section (431) is located in the installation chamber (11) and is abutted against and clamped against the nozzle interface (161), and the hemispherical head steering section (431) can rotate relative to the nozzle interface (161) under an external force.

2. The handheld steam cleaning machine according to claim 1, characterized in that: The cleaning machine housing (1) comprises a main housing (15) and a front cover (16); an assembly port (151) is provided on the main housing (15); the front cover (16) is detachably connected to the assembly port (151); and the nozzle interface (161) is provided on the front cover (16); The size of the assembly port (151) is larger than the size of the hemispherical head steering section (431), and the size of the hemispherical head steering section (431) is larger than the size of the nozzle interface (161).

3. The handheld steam cleaning machine according to claim 1, characterized in that: The water adding cap component (5) is provided with a safety pressure relief valve (51), and at least a portion of the safety pressure relief valve (51) extends into the steam generating chamber (21) through the water injection port (12).

4. The handheld steam cleaning machine according to claim 1, characterized in that: The switch assembly (3) comprises an operating switch component, a switch valve stem (32), a sealing valve core (33) sleeved on the switch valve stem (32), a transmission component (34) transmission-connected between the operating switch component and the switch valve stem (32), and a return spring (35); The sealing valve core (33) can block or release the nozzle connection port (22); The return spring (35) acts on the switch valve stem (32) so that the switch valve stem (32) always has a movement tendency to move backward, and the sealing valve core (33) always has a movement tendency to block the nozzle connection port (22).

5. The handheld steam cleaning machine according to claim 4, characterized in that: The nozzle connection port (22) comprises a large-diameter port section (221) and a small-diameter port section (222); the size of the large-diameter port section (221) is larger than the size of the sealing valve core (33), and the size of the small-diameter port section (222) is smaller than the size of the sealing valve core (33); The sealing valve core (33) is located in the large-diameter port section (221), and the sealing valve core (33) can abut against the small-diameter port section (222) so that the small-diameter port section (222) is disconnected from the large-diameter port section (221); The sealing valve core (33) can also be separated from the small-diameter port section (222) so that the small-diameter port section (222) is connected to the large-diameter port section (221).

6. The handheld steam cleaning machine according to claim 4, characterized in that: The switch valve stem (32) is also sleeved with a first sealing ring (36), and the first sealing ring (36) abuts against the inner wall of the switch connection port to form a sealing fit.

7. The handheld steam cleaning machine according to claim 4, characterized in that: The transmission component (34) is provided with a rotating shaft (341), and the transmission component (34) is rotatably connected to the cleaning machine housing (1) via the rotating shaft (341); One end of the transmission component (34) is a driving end (342), and the other end is a triggering end (343), and the rotating shaft (341) is located between the driving end (342) and the triggering end (343); The operating switch component can abut against the trigger end (343) to form a transmission fit, and the driving end (342) can abut against the switch valve stem (32) to form a transmission fit.

8. The handheld steam cleaning machine according to claim 4, characterized in that: A movable child lock rod (7) is provided on the cleaning machine housing (1), and the child lock rod (7) has a locked position state and an unlocked position state; When the child lock rod (7) is in a locked position, the child lock rod (7) can form an interference fit with the operating switch component to block power transmission between the operating switch component and the transmission component (34); When the child lock rod (7) is in the unlocked position, the interference between the child lock rod (7) and the operating switch component can be eliminated to restore the power transmission between the operating switch component and the transmission component (34).

9. The handheld steam cleaning machine according to claim 1, characterized in that: The installation chamber (11) is further provided with an inner isolation shell (6), and the steam generating boiler (2) is located above the inner isolation shell (6); The inner isolation shell (6) has a wire hole (61), one end of the internal cable passes through the wire hole (61) to form an electrical connection with the steam generating boiler (2), and the other end of the internal cable is connected to the external cable, and the external cable can form an electrical connection with the mains; A temperature controller (24) is provided at the lower end of the steam generating boiler (2), and a temperature indicator light assembly (17) is provided on the cleaning machine housing (1). The temperature controller (24) is communicatively connected with the temperature indicator light assembly (17), and the internal cables are electrically connected to the temperature controller (24) and the temperature indicator light assembly (17) respectively.

10. The handheld steam cleaning machine according to claim 1, characterized in that: A joint groove (4321) and a plurality of second sealing rings (4322) are provided on the outer wall of the steam injection section (432), and the joint groove (4321) can form a detachable connection with the nozzle attachment.

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