Handheld steam cleaner and surface cleaning device

Abstract

This invention discloses a handheld steam cleaner and a surface cleaning device. The handheld steam cleaner includes: a main body with a steam outlet; a water tank; a steam generator; a water supply path including a water pump; and a handle for the user to carry the steam cleaner. The handle is disposed on the water tank, and the handle and water tank can be removed from the main body as a single module. This solution solves the problem of inconvenient water filling when the handheld steam cleaner is attached to a corresponding surface cleaning device by placing the handle on the water tank and making both a single module that can be removed from the main body. Furthermore, by placing the water tank in the middle and the handle directly above the water tank, the center of gravity of the steam cleaner is located directly below and close to the user's hand when using the handheld steam cleaner alone, facilitating one-handed operation.

Description

Technical Field

[0001] This application relates to the field of cleaning equipment technology, and in particular to a handheld steam cleaner and a surface cleaning device. Background Technology

[0002] A steam cleaner consists of a water tank, a steam generator, and a steam outlet. The steam cleaner uses the steam generator to vaporize the water in the tank into high-temperature steam. This high-temperature steam accelerates the movement of dirt molecules on the surface to be cleaned, breaking down their bonds and thus eliminating stubborn stains. The high-temperature steam can effectively penetrate the pores and cracks of the surface to be cleaned, while also eliminating bacteria, mites, pathogens, and other microorganisms attached to the surface.

[0003] Chinese patent document CN209346884U discloses a multifunctional surface cleaning device with a detachable steam generating unit. In this device, a portable steam gun located on the upper body can be detached and used independently. However, when this portable steam gun is attached to a surface cleaning device, adding water to it requires removing the entire portable steam gun from the surface cleaning device, which is inconvenient. Furthermore, the portable steam gun lacks its own control components, and its center of gravity is relatively far from the handle for user carrying. Therefore, when used alone, the portable steam gun's functionality is limited and its operation is inconvenient. Summary of the Invention

[0004] To address the aforementioned problems, the present invention aims to provide an improved handheld steam cleaner and surface cleaning device.

[0005] To achieve the objectives of this invention, one aspect of the invention provides a handheld steam cleaner, comprising: a main body having a steam outlet; a water tank for storing water, disposed on the main body; a steam generator for converting water into steam, the steam generator being mounted on the main body and including a steam outlet in fluid communication with the steam outlet; a water supply path disposed on the main body and located between the water tank and the steam generator, the water supply path being provided with a water pump; and a handle for a user to carry the steam cleaner; wherein the handle is disposed on the water tank, and the handle and the water tank can be removed from the main body as a single module.

[0006] This solution provides a handheld steam cleaner with a new layout that is more compact.

[0007] In a preferred embodiment, the water tank includes: a bottom wall with an outlet formed therein; a top wall opposite to the bottom wall; and an outer side wall; wherein the handle and the vent switch are both located on the top wall.

[0008] In a preferred embodiment, the handheld cleaning machine further includes a vent switch configured to allow manual operation by the user to selectively activate the water pump. The vent switch is arranged such that when the handle is gripped in the user's palm, the user's thumb or forefinger can operate the vent switch. Further optimized, the handle is fixed to the top wall, and the vent switch is mounted on the handle. This optimized solution integrates the handle, vent switch, and water tank into a single module, allowing for convenient one-handed operation and solving the problem of inconvenient operation when the handheld steam cleaning device is used alone.

[0009] In a preferred embodiment, the peripheral sidewall extends rearward from the top wall.

[0010] In a preferred embodiment, the handheld steam cleaner includes a receiving cavity disposed on the main body, wherein the bottom wall of the water tank and at least a portion of the peripheral sidewalls are accessible into the receiving cavity.

[0011] In a preferred embodiment, the water supply path includes a water collection cavity disposed within the main body, the water collection cavity having an opening located on the receiving cavity; when the water tank is installed within the receiving cavity, the opening is aligned with the water outlet.

[0012] In a preferred embodiment, the handheld steam cleaner includes an interlocking mechanism for locking the water tank in the cavity, the interlocking mechanism including an unlocking switch disposed on the main body.

[0013] In a preferred embodiment, the handle is arc-shaped, the vent switch is installed at one end of the handle, and a portion of the interlocking mechanism is installed at the end of the water tank away from the vent switch.

[0014] In a preferred embodiment, the main body extends along a longitudinal axis, and the steam outlet, the steam generator, and the water tank are arranged sequentially along the longitudinal axis.

[0015] In a preferred embodiment, the handheld steam cleaner includes an operating unit, which includes at least one button for user control of the handheld steam cleaner. The main body has a head and a tail distributed at both ends along the axial direction, with the steam outlet located at the head and the operating unit located at the tail. By separately providing an operating unit on the handheld steam cleaner, the problem of limited functionality when used alone is solved.

[0016] In a preferred embodiment, the water tank is located in the middle of the main body.

[0017] To achieve the objectives of this invention, another aspect of this invention provides a surface cleaning device, which includes a device body having a cleaning base and an upright body, as well as a handheld steam cleaner as described in any of the above-mentioned technical solutions. The cleaning base includes a dirty air inlet, a wiping pad, and a steam distributor for distributing steam to the wiping pad. The upright body includes a dust cup and a vacuum motor. The dirty air inlet, the dust cup, and the vacuum motor are in sequential fluid communication. The handheld steam cleaner is detachably mounted on the upright body. The handle and the water tank are integrated as a single module and can be detached from the upright body without disassembling the handheld steam cleaner. Attached Figure Description

[0018] Figure 1 A perspective view of a handheld steam cleaner provided by the present invention;

[0019] Figure 2 A side view schematic diagram of a handheld steam cleaner provided by the present invention;

[0020] Figure 3 for Figure 2 The diagram shows a longitudinal section of the side view.

[0021] Figure 4 for Figure 3 A magnified view of a portion at point A;

[0022] Figure 5 For the appendix Figure 3 A diagram showing the removal of the water tank.

[0023] Figure 6 for Figure 5 A magnified view of a section at point B;

[0024] Figure 7 A longitudinal sectional view of a water tank provided by the present invention;

[0025] Figure 8This is a side view of a surface cleaning device provided by the present invention, wherein a handheld steam cleaner has been removed;

[0026] Figure 9 for Figure 8 A schematic diagram of the lower part of the surface cleaning device shown;

[0027] Figure 10 for Figure 8 The diagram shows a side view of a surface cleaning device, in which the water tank has been removed. Detailed Implementation

[0028] To illustrate the technical content, structural features, achieved objectives, and effects of the invention in detail, the technical solutions of the embodiments of this application will be described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. In the following description, for illustrative purposes, numerous specific details are set forth to provide a detailed description of various exemplary embodiments or implementations of the invention. However, various exemplary embodiments may also be implemented without these specific details or in one or more equivalent arrangements. Furthermore, the various exemplary embodiments may differ, but are not necessarily exclusive. For example, the specific shape, construction, and characteristics of the exemplary embodiments may be used or implemented in another exemplary embodiment without departing from the inventive concept.

[0029] In the following description, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature. In the description of this application, unless otherwise stated, "a plurality of" means two or more.

[0030] Furthermore, in this application, spatial relative terms such as “below,” “under,” “below,” “down,” “above,” “above,” “higher,” and “side” (e.g., as in a “sidewall”) are used to describe the relationship between one element and another (other) element as shown in the accompanying drawings. Spatial relative terms are intended to include different orientations of the device in use, operation, and / or manufacture other than those depicted in the drawings. For example, if the device in the drawings is flipped, an element described as “below” or “under” another element or feature would then be positioned “above” said other element or feature. Thus, the exemplary term “below” can include both above and below orientations. Furthermore, the device may be otherwise positioned (e.g., rotated 90 degrees or in other orientations), thus interpreting the spatial relative descriptive terms used herein accordingly.

[0031] In this application, unless otherwise expressly specified and limited, the term "connection" shall be interpreted broadly. For example, "connection" may be a fixed connection, a detachable connection, or an integral part; it may be a direct connection or an indirect connection through an intermediate medium.

[0032] Figure 1 This invention illustrates a handheld steam cleaner 100. The handheld steam cleaner 100 is configured to attach to a corresponding surface cleaning device 200 to provide steam to that device 200, and to be detached from the corresponding surface cleaning device 200 for independent use. Please refer to... Figure 3 The handheld steam cleaner 100 includes a main body 1, a water tank 2 detachably connected to the main body 1, a steam generator 3 that converts water into steam, and a water supply path 4 arranged within the main body 1. Figures 1 to 8 The relative positions of the heads are defined by the perspective that the head 11 (see below) is located in front of the tail 12 (see below) and the handle 24 (see below) is located above the body 1.

[0033] Please combine Figure 1 and Figure 5 The main body 1 includes an open-shaped receiving cavity 13, a steam outlet 14 for discharging steam to the outside, an electrical socket 9 for connecting to the outside, and an operating part 8 for controlling the operation of the handheld steam cleaner 100. The main body 1 extends from a head 11 to a tail 12 along the longitudinal axis L. The steam outlet 14 is located at the head 11 and is configured to rotate relative to the main body 1. The receiving cavity 13 is configured to receive a water tank 2 and is located in the middle of the main body 1. The wall surface of the main body 1 forming the receiving cavity 13 is configured to fit into the wall surface of its corresponding water tank 2. The electrical socket 9 is adjacent to the tail 12 away from the steam outlet 17 to prevent steam escaping from the steam outlet 14 from causing a short circuit at the electrical socket 9.

[0034] like Figure 1 , Figure 2As shown, the operation unit 8 is located at the tail 12 of the main body 1. The operation unit 8 includes an on / off switch 81 for operating the portable steam engine 100, a first steam flow button 82 for operating the portable steam engine 100 to output steam at a first steam flow rate, and a second steam flow button 83 for operating the portable steam engine 100 to output steam at a second steam flow rate, wherein the first steam flow rate is greater than the second steam flow rate. The operation unit 8 is equipped with three indicator lights (not shown in the figure) adjacent to the on / off switch 81, the first steam flow button 82, and the second steam flow button 83, respectively. These indicator lights are configured to indicate the current operating status of the portable steam engine 100 to the user. In other embodiments, the operation unit may also have more than two steam flow buttons for more precise operation of the portable steam engine's operating status.

[0035] Please continue reading. Figure 5 The water supply path 4 includes a water collection chamber 41, a pump chamber 42, and a pump 43. The water collection chamber 41 is configured adjacent to the receiving cavity 13 and has an opening 411 extending into the receiving cavity 13. An inlet channel (not shown) is located inside the opening 411, through which the water collection chamber 41 communicates with external fluid. The pump chamber 42 is adjacent to the receiving cavity 13 and located in front of the receiving cavity 13, and is configured to be in fluid communication with the water collection chamber 41. The pump 43 is arranged inside the pump chamber 42 and has a sensor switch 431. The sensor switch 431 is electrically connected to the pump 43 to control the pump 43's start and stop. An electrical socket 9 is electrically connected to the pump 43 to connect the pump 43 to an external power source.

[0036] like Figure 4 As shown, the inductive switch 431 has a first position H1 for stopping the water pump 43 and a second position H2 for starting the water pump, wherein the second position H2 is located in front of the first position H1. The inductive switch 431 is equipped with a switch spring (not shown in the figure), which provides a spring force to the inductive switch 431 pointing towards the first position H1. A movable cavity (not shown in the figure) is arranged on the main body 1 above the inductive switch 431. A movable rod 63, which can move up and down relative to the movable cavity, and a return spring 631, the upper end of which is fixedly connected to the wall of the movable cavity, are arranged within the movable cavity. The lower end of the return spring 631 is fixedly connected to the movable rod 63 to provide an upward spring force to the movable rod 63. The lower end of the movable rod 63 has a side surface 632 facing downward and forward, which abuts against the rear end of the inductive switch 431. Under the action of the side surface 632, when the movable rod 63 moves along the downward direction, it pushes the inductive switch 431 to move along the forward direction.

[0037] Please continue reading. Figure 5The steam generator 3 is arranged in front of the water pump chamber 42 and is in fluid communication with the outlet of the water pump 42. The water pump 42 is configured to deliver water from the water pump chamber 43 to the steam generator 3 when rotating and to block water from entering the steam generator 3 when stopped. The steam generator 3 includes a steam outlet 5, which is directly mechanically coupled to the steam outlet 14, thereby shortening the path of high-temperature steam from the steam generator 3 to the steam outlet 14, reducing pressure and heat loss along the path, and improving the thermal energy utilization rate of the handheld steam cleaner 100. In other embodiments, due to limitations such as the arrangement of the steam generator and the distance between the steam generator and the steam outlet, a conduit can be added between the steam outlet and the steam outlet of the steam generator to achieve fluid communication between the steam generator and the steam outlet. However, the fluid path of the steam should be shortened as much as possible and bends should be avoided to improve the thermal energy utilization rate of the handheld steam cleaner. For example, a short straight conduit extending along the longitudinal axis can be used to fluidly connect the steam outlet and the steam outlet.

[0038] The water tank 2 includes a bottom wall 21, a top wall 22 arranged opposite to the bottom wall 21, and an outer side wall 23 formed by a portion of the top wall 22 extending toward the bottom wall 21. The bottom wall 21, top wall 22, and outer side wall 23 together define a water cavity 25, which is used to store and supply water. The bottom wall 21 is provided with an outlet 211 corresponding to the inlet 411 on the water collection cavity 41. The outlet 211 extends into the water cavity 25 and has a movable door (not shown in the figure). The movable door is configured to be normally closed to close the outlet 211, and when the water tank 2 is attached to the main body 1, the opening 411 can open the movable door to allow fluid flow into the water cavity 25. The top wall 22 includes a first end 221 and a second end 222 that are far apart from each other, and the water cavity 25 is adjacent to both the first end 221 and the second end 222.

[0039] The handheld steam cleaner 100 also includes a handle 24 and a vent switch 61. The handle 24 is configured for the user to carry the steam cleaner 100 or the water tank 2. The handle 24 is configured with an arc-shaped structure and protrudes outward relative to the outer contour of the main body 1. The handle 24 has a third end 241 and a fourth end 242, which are respectively fixedly connected to the first end 221 and the second end 222. Please refer to... Figure 4The first end 221 and the third end 241 together define a push rod hole (not shown in the figure). A push rod 62 is disposed in the push rod hole, which can move back and forth along the axis of the push rod hole and can pass through the third end 241. The maximum range of movement of the push rod 62 is limited by the push rod hole. A vent switch 61 is rotatably connected to the third end 241. The end face of the vent switch 61 facing the third end 241 is configured such that its end face profile fits the end face profile of the third end 241. The vent switch 61 is configured such that when the handle 21 is grasped in the user's palm, the user's thumb or forefinger can operate the vent switch 61. Figure 4 As shown, the upper end of the push rod 62 abuts against the movable rod 63. Under the action of the spring force of the return spring 631, the movable rod 63 pushes the push rod 62 through the third end 241 and pushes down to release the gas switch 61.

[0040] Please combine Figure 6 and Figure 7 The handheld steam cleaner 100 also includes an interlocking mechanism 7 for locking the water tank 2 to the receiving cavity 13. The interlocking mechanism 7 includes a user-operated unlocking switch 71, an interlocking spring 72 providing a downward spring force to the unlocking switch 71, a locking key 73 capable of moving back and forth relative to the receiving cavity 13, and a locking groove 74 corresponding to the locking key 73. The locking groove 74 is located on the end of the water tank 2 away from the venting switch 61. The unlocking switch 71, interlocking spring 72, and locking key 73 are located on the main body 1 and adjacent to the receiving cavity 13. The locking key 73 is configured to convert upward and downward movement of the unlocking switch 71 into corresponding backward and forward movement of itself. When the water tank 2 is attached to the main body 1, the front end of the locking key 73 extends into the locking groove 74 to lock the water tank 2 to the receiving cavity 13. When the water tank 2 is about to detach from the main body 1, the user presses the unlock switch 71. The unlock switch 71 moves upward and causes the locking key 73 to move backward, disengaging the front end of the locking key 73 from the locking groove 74. The user then lifts the water tank 2 and releases the unlock switch 71. The unlock switch 71 and the locking key 73 reset under the action of the interlocking spring 72.

[0041] Please see Figure 1 The receiving cavity 13 is configured to be located approximately in the middle of the handheld steam cleaner 100. When the water tank 2 is attached to the main body 1, the center of gravity of the handheld steam cleaner 100 is located inside the water tank 2, below the handle 24. This arrangement allows the center of gravity to be located directly below and close to the user's hand when the user operates the handheld steam cleaner 100, facilitating one-handed operation.

[0042] Please combine Figure 3 and Figure 5The working principle of the handheld steam cleaner 100 when used alone is explained below. When the water tank 2 is attached to the main body 1, the water chamber 25 is fluidly connected to the water collection chamber 41, and the water in the water collection chamber 25 enters the water chamber 41 and the water pump chamber 42 successively. When the handheld steam cleaner 100 needs to output steam, the user presses the vent switch 61, which drives the top rod 62 and the movable rod 63 to move downward. Under the action of the movable rod 63, the induction switch 431 moves from the first position H1 to the second position H2 and starts the water pump 43. The started water pump 43 connects the water pump chamber 42 to the steam generator 3 and delivers water to the steam generator 3. The water is vaporized into steam at the steam generator 3, and under the action of fluid pressure, it passes through the steam outlet 5 to the steam outlet 14, and finally flows to the outside through the steam outlet 14.

[0043] Figures 8 to 10 The surface cleaning device 200 provided in this embodiment is shown. The surface cleaning device 200 is a vertical cleaning device that combines vacuum cleaning and steam cleaning functions. The surface cleaning device 200 includes a cleaning base 210 movable to the surface to be cleaned, a vertical body 220 rotatably hinged to the cleaning base 210, and a handheld steam cleaner 100 detachably connected to the vertical body 220. It should be noted that when the handheld steam cleaner 100 is used alone, its longitudinal axis L is approximately horizontal, while when the handheld steam cleaner 100 is attached to the vertical body 220, its longitudinal axis L is approximately vertical. Figures 8 to 10 The relative positions of the heads are defined by the perspective that the head 11 is located below the tail 12 and the handle 24 is located behind the body 1.

[0044] The upright body 220 includes a dust cup 2201 for receiving and storing debris, a vacuum motor 2202 located above and in fluid communication with the dust cup 2201, and a side 2203 for attaching the handheld steam cleaner 100. The dust cup 2201 is detachably attached to the upright body 220 for easy emptying by the user. The side 2203 is configured to direct the steam outlet 14 downwards towards the cleaning base 210 when the handheld steam cleaner 100 is attached to the upright body 220, reducing pressure and heat loss along the path from the steam outlet 14 to the fluid distributor 2103 (see below), thereby improving the thermal efficiency of the surface cleaning device 200.

[0045] The handheld steam cleaner 100 is attached to the side 2203 via its bottom surface 5 away from the water tank 2. When the handheld steam cleaner 100 is attached to the upright body 220, the water tank 2 and the handle 24 are exposed. The user can remove the water tank 2 and the handle 24 directly from the surface cleaning device 200 without disassembling the handheld steam cleaner 100, making it convenient for the user to add water to the water tank 2.

[0046] The cleaning base 210 has a dirty air inlet 2101 for sucking up debris from the surface to be cleaned, a wiping element 2102 that can contact the surface to be cleaned, and a steam distributor 2103 disposed towards the wiping element 2102. The wiping element 2102 is located behind the dirty air inlet 2101, and the steam distributor 2103 is located above the wiping element 2102. The dirty air inlet 2101 is in fluid communication with the dust cup 2201, and the fluid distributor 2103 is in fluid communication with the steam outlet 14 of the handheld steam cleaner 100. When the surface cleaning device 200 is working, the vacuum motor 2202 is activated to suck up debris from the surface to be cleaned through the dirty air inlet 2101 and store it in the dust cup 2201. The handheld steam cleaner 100 supplies steam to the steam distributor 2103, which distributes high-temperature steam to the wiping element 2102, and the wiping element 2102 uses the steam to clean the surface to be cleaned.

[0047] The above embodiments are only for illustrating the technical concept and features of the present invention, and are intended to enable those skilled in the art to understand the content of the present invention and implement it accordingly. They should not be construed as limiting the scope of protection of the present invention. All equivalent changes or modifications made in accordance with the spirit of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A surface cleaning device, characterized in that, Includes a cleaning base (210), an upright body (220), and a handheld steam cleaner (100). The handheld steam cleaner includes a main body (1) with a steam outlet (14), a water tank (2) disposed on the main body (1) for storing water, a steam generator (3) for converting water into steam, a water supply path (4), a handle (24) for the user to carry the handheld steam cleaner (100), and an operating unit (8). The steam generator (3) is mounted on the main body (1) and includes a steam outlet (5), which is in fluid communication with the steam outlet (14). The water supply path (4) is arranged on the main body (1) and located between the water tank (2) and the steam generator (3), and a water pump (43) is provided on the water supply path (4). The handle (24) is disposed on the water tank (2), and the handle (24) and the water tank (2) can be removed from the main body (1) as a whole module. The main body (1) extends along a longitudinal axis (L), the steam outlet (14), the steam generator (3), and the water tank (2) are arranged sequentially along the longitudinal axis (L). The main body (1) has a head (11) and a tail (12) distributed at both ends of the longitudinal axis. The operating part (8) includes at least one button for controlling the operation of the handheld steam cleaner (100). The steam outlet (14) is located at the head (11), and the operating part (8) is located at the tail (12). The cleaning base (210) includes a dirty air inlet (2101), a wiping pad (2102), and a steam distributor (2103) for distributing steam to the wiping pad (2102). The upright body (220) includes a dust cup (2201) and a vacuum motor (2202), and the dirty air inlet (2101), the dust cup (2201) and the vacuum motor (2202) are fluidly connected in sequence; The main body (1) is provided with a receiving cavity (13), and the water tank (2) is detachably installed in the receiving cavity (13) and located in the middle of the main body (1); the handheld steam cleaner (100) has a center of gravity, and when the water tank (2) is installed in the receiving cavity (13) of the main body (1), the center of gravity of the handheld steam cleaner (100) is located inside the water tank (2) and directly below the handle (24); the handheld steam cleaner (100) also includes a venting switch (61), which is installed on the handle (24) and configured to be manually operated by the user to selectively turn on the water pump (43). The handheld steam cleaner (100) is detachably mounted on the upright body (220), and the handle (24) and the water tank (2) are integrated as a single module that can be removed separately from the receiving cavity (13) of the main body (1) without disassembling the handheld steam cleaner (100), while the rest of the handheld steam cleaner (100) remains mounted on the upright body (220).

2. The surface cleaning device according to claim 1, characterized in that, The water tank (2) includes: a bottom wall (21) with an outlet (211) formed therein; a top wall (22) opposite to the bottom wall (21); and an outer side wall (23); wherein the handle (24) is located at the top wall (22).

3. The surface cleaning device according to claim 2, characterized in that, The vent switch (61) is arranged to satisfy the following condition: when the handle (24) is held in the palm of the user's hand, the user's thumb or index finger can operate the vent switch (61).

4. The surface cleaning device according to claim 3, characterized in that, The handle (24) is fixed to the top wall (22).

5. The surface cleaning device according to claim 2, characterized in that, The outer sidewall (23) extends from the top wall (22) toward the bottom wall (21).

6. The surface cleaning device according to claim 2, characterized in that, When the water tank (2) is installed in the accommodating cavity (13), the bottom wall (21) and at least part of the outer sidewall (23) of the water tank (2) can enter the accommodating cavity (13).

7. The surface cleaning device according to claim 6, characterized in that, The water supply path (4) includes a water collection cavity (41) disposed in the main body (1), the water collection cavity (41) having an opening (411) located on the accommodating cavity (13); when the water tank (2) is installed in the accommodating cavity (13), the opening (411) is connected to the water outlet (211).

8. The surface cleaning device according to claim 6, characterized in that, The handheld steam cleaner (100) includes an interlocking mechanism (7) for locking the water tank (2) in the accommodating cavity (13), and the interlocking mechanism (7) includes an unlocking switch (71) disposed on the main body (1).

9. The surface cleaning device according to claim 8, characterized in that, The handle (24) is arc-shaped, the vent switch (61) is installed at one end of the handle (24), and a part of the interlocking mechanism (7) is installed at the end of the water tank (2) away from the vent switch (61).

10. The surface cleaning device according to claim 1, characterized in that, The handle (24) is at least partially protruding from the outer contour of the body (1).

11. The surface cleaning device according to claim 1, characterized in that, The steam outlet (5) is directly mechanically coupled to the steam outlet (14).

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