CN117545890A - Laundry care appliance with a main recess arranged in the steam surface - Google Patents

Abstract

A garment care device comprising a treatment surface (109), a steam generator (104) having a steam surface (172) with a water supply point (DP), an electric heater (144) and a temperature sensor having a temperature sensing element arranged in a Central Area (CA) of the steam surface. A primary groove (176) is disposed in the steam surface and has a first end (178) disposed near the water supply point and a second end (179) disposed near the central region. The main recess has a bottom surface that is inclined compared to the treatment surface. The main recess thus carries water between the water supply point and the central area. A first groove (180A) is also arranged in the steam surface, the first groove extending towards a first rear region of the steam surface. The primary groove and the first groove are fluidly connected at the second end.

Description

Laundry care appliance with a main recess arranged in the steam surface

Technical Field

The present invention relates to a laundry care appliance having a steam generator whose temperature is controlled using a temperature sensing signal.

The invention can be used in the field of clothing care.

Background

Laundry care devices are known for removing creases from laundry by using heat and moisture from steam. One type of laundry care appliance comprises a base housing a water tank and a hand unit comprising a steam generator and a treatment surface for treating laundry. Water from the water tank is supplied to the steam generator through a flexible hose between the base and the hand unit. The steam from the steam generator is supplied to the laundry through a steam outlet defined by the treatment surface.

A different type of laundry care appliance comprises a hand unit comprising a steam generator, a treatment surface and a water tank. In this design, the laundry care appliance may not comprise a base separate from the hand unit.

Controlling the temperature of the steam generator is a critical consideration in such laundry care devices. The steam generator is typically heated by an electric heater. The water supplied to the steam generator has a cooling effect on the steam generator. The temperature of the steam generator is sensed by a temperature sensing element. Enhancing the responsiveness of the temperature sensing element to the cooling provided by the water on the steam surface and the heating provided by the electric heater (i.e., its ability to detect rapid changes in temperature) remains a challenge. Furthermore, maintaining a generally uniform temperature distribution in the steam generator by well distributing the water remains a challenge.

DE 69225205T2 discloses an iron having a soleplate with a top surface, the soleplate further having a plurality of through openings from which water vapour is released; an iron body attached to the soleplate and covering the top surface; a water tank in the body; a water vapor container defined by a channel above the heating element; and a water dispenser for dispensing water into a predetermined substantially flat position.

Disclosure of Invention

It is an object of the present invention to propose a laundry care device solving the above-mentioned challenges.

The invention is defined by the independent claims. Advantageous embodiments are defined in the dependent claims.

To this end, the laundry care apparatus according to the present invention comprises:

a treatment surface for treating a laundry article,

a steam generator in thermal contact with the treatment surface, the steam generator being heated by an electric heater, the steam generator comprising a steam surface having a water supply point for receiving water for generating steam,

a temperature sensor having a temperature sensing element for generating a signal for controlling the electric heater, the temperature sensor being arranged in a central region of the steam surface,

A main groove arranged in the steam surface, the main groove having a first end arranged near the water supply point and a second end arranged near the central area for transporting water between the water supply point and the central area, the main groove having a bottom surface inclined compared to the treatment surface,

a first groove disposed in the steam surface, the first groove extending toward a first rear region of the steam surface, wherein the main groove and the first groove are fluidly connected at the second end.

The inclined bottom surface of the main recess means that when the treatment surface is oriented horizontally, for example by being placed on the horizontal surface of the ironing plate, the water flows more quickly away from the dosing point in the direction of the central area.

Since the temperature sensor, in particular the temperature sensing element of the temperature sensor, is arranged in the central area and the main recess is arranged for transporting water to the central area, this arrangement may help the temperature control to respond faster to the water supplied to the steam generator.

Furthermore, the main groove and the first groove help to guide and distribute water in the steam generator, in particular towards the first rear area. This helps to reduce "hot spots" within the steam generator. A corresponding more uniform temperature in the steam generator may help provide a response and reliable temperature control. A more uniform temperature in the steam generator may, for example, facilitate the use of control logic for intelligent temperature control, thereby enabling improved steam performance.

In some embodiments, the bottom surface of the primary recess is in the range [2; an angle (e.g., 7 degrees) within 10 degrees (such as [3;8] degrees). This may help the water flow relatively quickly towards the central area.

The main groove is for example arranged parallel to the longitudinal axis of the steam surface and preferably extends along the longitudinal axis of the steam surface.

Alternatively or additionally, the temperature sensor, and in particular the temperature sensing element of the temperature sensor, is arranged on the longitudinal axis of the steam surface.

The first rear region may be a left or right region of the steam surface compared to the longitudinal axis.

The main groove has, for example, a width in the range [0.5; a depth within 8 mm (e.g., maximum depth) and within range [2;10 mm.

This "maximum depth" reflects the fact that in some examples the main groove may have more than one depth, for example when the bottom surface of the main groove is inclined relative to the treatment surface while the steam surface remains parallel to the treatment surface. In such an example, the primary groove becomes progressively deeper toward the central region.

Preferably, the first rear region is closed by a first transverse rib along which the first groove extends. The first transverse rib helps to reduce the risk of splashing (in other words, release of water from the steam generator), although the first groove directs water towards the rear of the steam generator, where steam may be released downstream towards the steam outlet.

In some embodiments, the laundry care device further comprises a second groove arranged in the steam surface, the second groove extending towards a second rear region of the steam surface, the main groove, the first groove and the second groove being fluidly connected at the second end.

Preferably, the second rear region is opposite to the first rear region compared to the longitudinal axis of the steam surface. Thus, the first groove and the second groove can define a pair of bifurcated grooves extending outwardly from the second end.

Each of the first and second grooves may extend toward a respective portion of a heating element included in the electric heater, the respective portion being proximate one of the electrical connections to the heating element. Thus, the first and second grooves help to transport water to and thereby cool "hot spots" that are aligned with portions of the heating element that are proximate to the electrical connection.

The first groove and/or the second groove may each have a thickness, for example, in the range [0.5; a depth (e.g., maximum depth) within 5 millimeters (such as [1.5;3] millimeters), and in the range [1.0; a width (e.g., maximum width) within 7.0 millimeters (such as [2.0;5.0] millimeters).

Preferably, the second rear region is closed by a second transverse rib along which the second groove extends. The second transverse rib may help to reduce the risk of splashing (in other words, releasing liquid water from the steam generator), although the second groove directs the water towards the rear of the steam generator, where the steam may be released downstream towards the steam outlet.

In one embodiment, the first rear region is closed by a first transverse rib and the second rear region is closed by a second transverse rib, wherein the first groove extends along the first transverse rib and the second groove extends along the second transverse rib.

The first transverse rib preferably comprises a first rear portion adjacent to the rear portion of the garment care device, the first rear portion extending to contact the cover of the steam generator. Alternatively or additionally, the second transverse rib may comprise a second rear portion proximate to the rear portion of the laundry care device, the second rear portion extending to contact the cover of the steam generator. In such examples, the first and second rear portions help to retain liquid water in the main steam zone, for example, even during relatively severe forward and backward ironing strokes.

In some embodiments, the garment care device comprises a protrusion protruding from the steam surface. Such protrusions may help minimize the detrimental effects of steam promoter flaking off the steam surface.

Preferably, the protrusions are arranged in circular symmetry around the first end. This may help the water spread more evenly around the feed point.

Such protrusions may have any suitable shape. In some embodiments, each protrusion is preferably shaped according to, but not limited to, any one of the following three-dimensional shapes.

The shape of the cone is a shape of a cone,

the shape of a truncated cone is that of a cone,

the shape of the dome is that of the dome,

a cylindrical shape.

Such a shape may allow water to flow more easily than protrusions with edges, such as cubes, or pyramids. In principle, any shape that does not define corners or edges is contemplated.

For example, the base of the cone-shaped or dome-shaped protrusion may be elliptical rather than circular.

Preferably, the distance between two adjacent protrusions in the radial direction of the protrusions is in the range [3;8 mm.

This spacing may help to effectively direct and disperse water around the feed point without much obstruction. The spacing between the protrusions may help water evaporate around the protrusions, even when scale is present. Scale has been found to adhere to the protrusion-evaporation surface interface. The water droplets may remain at such an interface for a sufficient time to evaporate.

Preferably, the angle of the steam surface is such that it extends parallel to the bottom surface of the main groove. This further helps to more effectively divert water towards the rear of the laundry care device, in particular when the water fed into the steam generator cannot be completely contained within the first recess and/or the second recess (when the second recess is present).

Preferably, the steam surface is inclined between a higher point and a lower point compared to the treatment surface, the temperature sensing element being arranged at a height between the higher point and the lower point.

By positioning the temperature sensing element between the higher and lower points of the steam surface, the laundry care appliance may exhibit improved responsiveness to cooling provided by water on the steam surface and heating provided by the electric heater.

The term "between a higher point and a lower point" as used herein is intended to encompass heights that are aligned with either the higher point or the lower point.

The higher points, lower points and heights may be determined by the distance of their projections from the treatment surface.

In some embodiments, the temperature sensing element is arranged at a position such that its perpendicular projection coincides with an area in which the heating element of the electric heater does not extend. This better enables temperature control to be directed more by the temperature within the steam generator than by the temperature of the electric heater.

The laundry care appliance preferably further comprises a protruding element arranged in the steam generator for mounting the temperature sensor.

The temperature sensor is for example detachably mounted to the protruding element.

Preferably, the protruding element comprises a cavity for mounting the temperature sensing element therein.

In some embodiments, the electric heater includes a generally U-shaped heating element that includes a pair of curved portions that are bowed inwardly toward each other in a direction of a longitudinal central axis of the steam generator. In such an embodiment, the protruding element protrudes away from the steam surface at a location between the pair of curved portions.

The pair of curved portions is arranged, for example, in a central region of the steam generator. This may help to make the temperature control more robust to lateral tilting during steaming.

The laundry care appliance preferably comprises a control unit configured to receive the temperature signal in order to activate or deactivate the electric heater based on a given temperature threshold.

For example, when the temperature signal indicates a temperature equal to or higher than a given temperature threshold value, the supply of current to the electric heater may be stopped, and when the temperature signal indicates a temperature lower than the given temperature threshold value, the supply of current to the electric heater may be turned on.

In one set of embodiments, a laundry care apparatus includes:

a base portion including a water tank,

a hand unit including the steam generator, and

a hose line for carrying water from the water tank to the steam generator.

The water is carried by a pump arranged in the base or alternatively in the hand unit.

In another set of embodiments, a laundry care apparatus includes:

a hand unit, a hand unit and a hand unit,

water tank

A pump for supplying water from the water tank to the steam generator, wherein the steam generator, the water tank and the pump are housed in the hand unit.

In yet another set of embodiments, the laundry care apparatus comprises:

a hand unit, a hand unit and a hand unit,

a water tank disposed higher than the steam generator, and

a valve disposed between the water tank and the steam generator for supplying water from the water tank to the steam generator, wherein the steam generator, the water tank and the valve are included in the hand unit.

A detailed description and other aspects of the invention will be given below.

Drawings

Specific aspects of the invention will now be explained with reference to the embodiments described hereinafter in connection with the drawings, wherein identical parts or sub-steps are designated in the same manner:

Figure 1 schematically depicts a laundry care apparatus according to one example,

figure 2 schematically depicts a laundry care apparatus according to another example,

figure 3 schematically depicts a laundry care apparatus according to yet another example,

figure 4A provides a plan view of a steam generator of the laundry care appliance,

figure 4B provides a plan view as shown in figure 4A and shows a portion of the arrangement of heating elements,

figure 4C provides a plan view as shown in figure 4A and an area representing the location of a hot spot in the vapor chamber,

figure 4D provides a plan view as shown in figure 4A and two areas representing the locations of two hot spots in the vapor chamber,

figure 4E provides a plan view as shown in figure 4A and a dashed circle showing the arrangement of a plurality of protrusions protruding from the steam surface of the steam chamber,

figure 4F provides an enlarged perspective view of the steam surface of the steam generator showing the protrusions,

figure 4G provides a plan view of a single protrusion,

figure 4H provides a plan view of nearest neighbor projections,

figure 4I provides a perspective view of the steam generator shown in figure 4A,

fig. 5 provides a top view of the steam generator as shown in fig. 4A-4F and 4I, with the cover mounted on the steam generator;

FIG. 6 provides a cross-sectional view of the steam generator shown in FIGS. 4A-4F and 4I, showing an inclined steam surface;

fig. 7 provides a cross-sectional view of the steam generator shown in fig. 5, showing an inclined steam surface,

figure 8 provides an enlarged view of a portion of the cross-sectional view shown in figure 7,

FIG. 9 provides another cross-sectional view of the steam generator shown in FIG. 5, and

fig. 10 provides a schematic cross-sectional view of a steam generator having a steam surface extending parallel to the process plate and an inclined primary recess.

Detailed Description

Fig. 1 shows a laundry care apparatus 100A according to a non-limiting example.

The apparatus 100A comprises a treatment surface 109 for treating laundry (not shown). For example, treating the laundry includes removing wrinkles or steaming.

The apparatus 100A further comprises a steam generator 104 in thermal contact with the treatment surface. The steam generator 104 is heated by an electric heater 144. The heating provided by the electric heater enables the steam generator 104 to evaporate the water pumped into it by the pump 106.

The steam generator 104 includes a steam surface that receives water for generating steam by evaporation. The apparatus 100A also includes a temperature sensor having a temperature sensing element for generating a signal for controlling the electric heater 144. These technical aspects will be described in further detail below.

The example laundry care device 100A includes a water tank 102 for containing water, and a steam generator 104 receives water from the water tank 102.

The laundry care apparatus 100A further comprises a pump 106 arranged between the water tank 102 and the steam generator 104. The pump 106 is adapted to pump water from the water tank 102 to the steam generator 104.

The pump 106 may be disposed in the base 112 (as shown) or alternatively in the hand unit 114 (not shown in fig. 1).

The treatment surface 109 corresponds to the outer surface of the soleplate 108 and is intended to be in contact with laundry.

As shown in FIG. 1, the soleplate 108 defines a plurality of steam outlets 110. The steam outlet 110 may be in fluid communication with the steam generator 104. The fluid communication between the steam generator 104 and the steam outlet 110 allows steam generated in the steam generator 104 to be supplied to clothing adjacent the soleplate 108 (and in some cases contacting the soleplate 108).

The treatment surface 109 is preferably an entirely flat surface, which means that it forms a surface in a plane (with or without small discontinuities, such as depressions around the steam outlet 110).

For example, the steam outlets 110 are arranged in such a manner as to distribute steam to different parts of the laundry.

The steam outlet 110 is in fluid communication with the steam generator 104. This allows the steam generated in the steam generator 104 to be supplied to the fabric treated using the laundry care device 100A.

Although fig. 1 shows the laundry care apparatus 100A having six steam outlets, the number of steam outlets may be greater or smaller.

The device 100A includes a base 112 and a hand unit 114. The base 112 includes the water tank 102 and the pump 106, and the hand unit 114 includes the steam generator 104 and the soleplate 108.

Hose line 116 includes a water line (not shown) for carrying water from tank 102 to steam generator 104. The hose cord 116 is preferably flexible to facilitate movement of the hand unit 114 while maintaining a supply of water to the steam generator 104.

A control unit 120, such as a microcontroller, is used to control (via an intermediate thyristor or other power electronics) the water flow rate of the pump 106, which in turn allows control of the steam flow exiting the steam outlet 110. The water flow rate of pump 106 may be varied by varying the duty cycle of its power supply.

In the non-limiting example shown in fig. 1, the laundry care apparatus 100A includes a button 124. The button 124 is actuatable by a user of the laundry care apparatus 100A. Any suitable design of button 124 is contemplated, such as a push button, a slide button, a steam trigger, a capacitive sensor, or other type of sensor.

Preferably, the laundry care device 100A comprises a handle 126 for being gripped by a user in order to assist the user in moving the treatment surface 109 relative to the laundry to be treated. Thus, the handle 126 may be included in the hand unit 114.

The button 124 is preferably disposed adjacent the handle 126 such that the button 124 is actuatable when the user grasps the handle 126, such as by the action of a finger.

For example, the button 124 takes the form of a steam trigger, such as a micro-switch, arranged in the hand unit 114 and connected to a microcontroller included in the control unit 120, to receive a switching signal from the switch and to control the pump 106 based on the switching signal.

In addition to the button 124, the example laundry care device 100A further includes a sensing unit 128, the sensing unit 128 being configured to detect whether a user holds the laundry care device 100A. The buttons 124 and/or the sensing unit 128 may be used to control operating parameters of the laundry care device 100A, resulting in delivery of steam through the steam generator 104.

In the non-limiting example shown in fig. 1, the control unit 120 is connected (not shown) to the button 124 and the sensing unit 128 such that the delivery of steam from the steam generator 104 is responsive to actuation of the button and/or sensor signals received from the sensing unit 128.

Fig. 2 schematically depicts another example laundry care apparatus 100B. Fig. 2 is based on fig. 1. Similar to the example shown in fig. 1, the laundry care apparatus 100B comprises a water tank 102 and a pump 106 for pumping water from the water tank 102 to the steam generator 104.

Water is delivered from the water tank 102 to the steam generator 104 in the hand unit 114 via a water pipe 135. As previously described, the water tube 135 is included in the hose line 116.

In the non-limiting example shown in fig. 2, the laundry care apparatus 100B comprises a pressure relief valve device 136 between the pump 106 and the steam generator 104. The pressure relief valve arrangement 136 is configured to relieve excessive pressure in the laundry care apparatus 100B by directing water back around the circuit to the water tank 102 instead of the steam generator 104.

As schematically shown in fig. 2, water is pumped from the water tank 102 to the steam generator 104 via the feed head 138. The feed head 138 is sealed to a cover 140 of the steam generator 104 by a feed seal 142.

The steam generator 104 is preferably formed by a casting process using a metal or metal alloy. The steam generator 104 may be cast from aluminum, for example.

Similarly, the cover 140 is preferably formed by a casting process using a suitable metal or metal alloy. The cover 140 may be cast from aluminum, for example. Thus, in some non-limiting examples, both the steam generator 104 and the cover 140 are cast from aluminum.

The design of the steam generator 104 and the cover 140 will be described in more detail below.

The bottom plate 108 may also be cast from a suitable metal or metal alloy, such as aluminum. However, such metal base plate 108 is preferably coated with a suitable material in order to provide the treated surface 109 with suitable fabric slip properties.

The steam generator 104 is heated by an electric heater 144. The electric heater 144 includes a pair of electrical connections 144B for receiving a power supply. The heat provided by the electric heater 144 causes the water supplied into the steam generator 104 via the supply head 138 to be evaporated. The resulting steam is supplied to the laundry to be treated through the steam outlet 110 provided in the soleplate 108, as described above.

As shown in fig. 2, power is supplied to the laundry care apparatus 100B through a power line 148. In this particular example, the power cord 148 extends from the base 112 rather than from the hand unit 114. However, as previously described, power is supplied to the hand unit 114, and in particular the electric heater 144, via electrical wires provided in the hose cord 116.

In the non-limiting example shown in fig. 2, the base 112 includes a first printed circuit board assembly 150. The pump 106 is controlled by control electronics included in the first printed circuit board assembly 150. At least a portion of the control unit 120 described above may be provided, for example, by such control electronics included in the first printed circuit board assembly 150.

More generally, the laundry care apparatus 100a,100b comprises a temperature sensor 152 for generating a signal for controlling the electric heater 144. The arrangement of the temperature sensor 152 with respect to the steam generator 104 will be described in more detail below.

Controlling the electric heater 144 based on the signal generated by the temperature sensor 152 may be implemented in any suitable manner. Preferably, a relay (not visible) is configured to switch the electric heater 144 on and off based on the temperature sensed by the temperature sensor 152.

In a non-limiting example, the temperature sensor 152 includes a temperature sensing element (not visible in fig. 2), and the temperature of the steam generator 104 is sensed by a change in resistance of the temperature sensing element.

More generally, the control unit 120 may receive a temperature signal, for example, from a temperature sensor 152, to activate or deactivate the electric heater 144 based on a given temperature threshold.

For example, when the temperature signal indicates a temperature equal to or higher than a given temperature threshold, the supply of current to the electric heater 144 may be stopped, and when the temperature signal indicates a temperature lower than the given temperature threshold, the supply of current to the electric heater 144 may be turned on.

For example, the exemplary hand unit 114 shown in fig. 2 includes a second printed circuit board assembly 154, which second printed circuit board assembly 154 may also be considered a power printed circuit board assembly 154. The change in resistance signal from the thermistor element may be received, for example, by control circuitry included in the power printed circuit board assembly 154 to control the opening and closing of the relay, thereby controlling the heating provided by the electric heater 144. Such temperature feedback control of the electric heater 144 may be based on, for example, a predefined firmware temperature setting.

In some non-limiting examples, a relay (not shown) is used to control the pump 106, and turning on and off the relay to control the water supply to the steam generator 104 is based on a change in the resistance signal from the temperature sensing element. Such feedback control of pump 106 may be based, for example, on a predefined firmware pump duty cycle setting.

The example garment care device 100B shown in fig. 2 also includes a thermal fuse assembly 156. As shown, the thermal fuse assembly 156 is in thermal contact with the steam generator 104 and prevents the electric heater 144 from heating the steam generator 104 above a given temperature limit. When the temperature exceeds the given temperature limit, the fusing of the thermal fuse assembly causes an open circuit, which prevents operation of the electric heater 144.

In the non-limiting example shown in fig. 2, the laundry care apparatus 100B comprises an indicator 158, for example comprising or in the form of a light emitting diode. The indicator 158 may be controlled, for example, by control circuitry included in the power printed circuit board assembly 154 to indicate a selected (e.g., user-selected) mode of operation of the laundry care device 100B. The indicator 158 may also be used to indicate the status of the device 100B, for example, indicating that the device is heated and ready during start-up.

Fig. 3 illustrates yet another example laundry care apparatus 100C that has some similarities to the example laundry care apparatus 100a,100b described above with respect to fig. 1 and 2. However, in the non-limiting example shown in fig. 3, the various components of the laundry care apparatus 100C are each included in the hand unit 114. In other words, the laundry care apparatus 100C does not have a base. Accordingly, the water tank 102, the steam generator 104, the control unit 120, and the pump 106 are included in the hand unit 114 along with the base plate 108, the buttons 124, and the sensing unit 128.

Alternatively (not shown), in the laundry care apparatus 100C, instead of using the pump 106 to transport water from the water tank to the steam generator, water may be transported from the water tank to the steam generator by gravity when the water tank is arranged higher than the steam generator. The valve is disposed along a flow path between the water tank and the steam generator 104. If the valve is electrically controllable, it may be controlled by the control unit 120 to open or close the waterway.

The laundry care apparatus 100C shown in fig. 3 takes the form of a steam iron. Because the water tank 102 is incorporated in the hand unit 114 rather than in the base, a smaller water tank 102 may be required, although the laundry care apparatus 100C may still benefit from portability, and have the advantage of saving space because such a base is not required. Due to the proximity of the water tank 102 relative to the steam generator 104, the responsiveness to the delivery of steam via user inputs received via (at least) the button 124 and the sensing unit 128 may also be relatively fast.

Fig. 4A-4E and 4I provide plan views of the steam generator 104 of the example garment care device 100a,100b,100 c.

Fig. 5 provides a top view illustrating the steam generator 104 with the cover 140 as shown in fig. 4A-4E and 4I. The cover 140 encloses the steam generator 104. Fig. 5 also depicts the backplane 108, temperature sensor 152, and thermal fuse assembly 156 as seen from the outside.

As previously mentioned, the cover 140 is preferably cast from a suitable metal alloy or metal such as aluminum.

The garment care device 100a,100b,100c includes an electric heater 144. In this non-limiting example, the electric heater 144 includes or is defined by a heating element embedded in a lower region of the steam generator 104.

The steam generator 104 is generally elongated along a longitudinal axis 160. The longitudinal axis 160 extends along a centerline that conceptually bisects the steam generator 104. The steam generator 104 also has a wider rear end 162 and a sharper front end 164.

Both electrical connections 144B are preferably disposed proximate the rear end 162 of the steam generator 104, but are spaced apart from each other such that the electrical connections 144B are positioned on either side of the longitudinal axis 160. The heating element 144 extends in a loop from one of the electrical connections 144B located near the rear end 162 to a turning point 166 near the front end 164, and from the turning point 166 toward the other of the electrical connections 144B. Thus, the heating element 144 may be considered to have an overall U-shape.

The loop formed by the heating element 144 is preferably symmetrical such that the longitudinal axis 160 defines an axis of symmetry of the heating element 144. This helps the heating element 144 to provide relatively uniform heating of the steam generator 104.

The laundry care appliance 100a,100b,100c preferably comprises a protruding element 168 arranged in the steam generator 104 for mounting the temperature sensor 152.

The protruding element 168 may alternatively be referred to as a "boss" or "mounting feature" that receives a temperature sensing element of the temperature sensor 152, such as a thermistor element.

In the non-limiting example shown in fig. 4A and 4B, the protruding element 168 defines a cavity 170, for example in the form of a pinhole, in which the temperature sensing element may be received in the cavity 170.

More generally, the steam generator 104 includes a steam surface 172, the steam surface 172 having a water supply point DP that receives water for generating steam.

In the example shown in fig. 4A-4E and 4I, the longitudinal axis 160 of the steam generator 104 also corresponds to the longitudinal axis of the steam surface 172.

The water supply point DP defines a location in the steam surface 172 where the steam surface 172 initially receives water supplied into the steam generator 104. The water is supplied, for example, by the supply head 138 described above with respect to fig. 2.

The temperature sensor 152, and in particular the temperature sensing element of the temperature sensor 152, is arranged in the central area CA of the steam surface 172.

For example, the temperature sensor 152, and in particular the temperature sensing element of the temperature sensor 152, is arranged on the longitudinal axis 160 of the steam surface 172.

The central region CA may correspond to the center of the rectangle R inscribing the heating element 144, as shown in fig. 4B.

Placement of the temperature sensor 152 in the central area CA may help to enhance responsiveness to heating by the electric heater 144 (e.g., when the relay described above turns on the electric heater 144) and to cooling of water supplied into the steam generator 104.

A primary recess 176 is disposed in the steam surface 172. In other words, the primary groove 176 is recessed relative to the steam surface 172.

The main recess 176 has a first end 178 disposed about the water supply point DP and a second end 179 disposed about the central region CA, as best shown in fig. 4B. Accordingly, the main groove 176 is arranged for transporting water between the water supply point DP and the central area CA.

To this end, the main recess 176 has a bottom surface that is inclined compared to the treatment surface 109. This means that when the treatment surface 109 is oriented horizontally, for example by being placed on a horizontal surface of an ironing plate (not shown), water flows on the bottom surface of the main recess 176 away from the feed point DP in the direction of the central area CA.

In some embodiments, the bottom surface of the main recess 176 is in the range [2 ] compared to the treatment surface 109; an angle within 10 degrees (e.g., 7 deg.) is tilted.

This may help to quickly flow water toward the central area CA and help to more effectively divert water toward the rear ends 162 of the garment care devices 100a,100b,100c, thereby helping to reduce hot spots toward the rear of the steam surface 172.

Since the temperature sensor 152, and in particular the temperature sensing element of the temperature sensor 152, is arranged in the central area CA and the main recess 176 is arranged for transporting water to the central area CA, this arrangement may help the temperature control to respond faster to the water supplied to the steam generator 104.

The main groove 176 has a width, for example, in the range [0.5; depth within 8 mm (e.g., maximum depth) and range [2;10 mm (e.g., maximum width).

The depth of the primary groove 176 may correspond to the height of the primary groove 176 between the bottom surface of the primary groove 176 and the steam surface 172 at a given point along the primary groove 176.

The width of the primary groove 176 may be measured transverse to the direction of extension of the primary groove 176 toward the central region CA between opposite points at which the primary groove 176 meets the steam surface 172 at given points along the primary groove 176.

The primary grooves 176 are arranged, for example, parallel to the longitudinal axis 160 of the steam surface 172 and preferably extend along the longitudinal axis 160 of the steam surface 172.

In the non-limiting example shown in fig. 4A-4E and 4I, the primary groove 176 extends along the longitudinal axis 160 from the water supply point DP to the protruding element 168 that receives the temperature sensing element. This may help the feedback control of the electric heater 144 to be more sensitive to the water present in the steam generator 104.

More generally, the first recess 180A is also disposed in the steam surface 172. The first recess 180A extends towards the first rear region RA1 of the steam surface 172, in other words in the direction of the rear end 162, as shown in fig. 4C. The primary groove 176 and the first groove 180A are fluidly connected at the second end 179.

The primary grooves 176 and the primary grooves 180A help to direct water into various areas of the steam generator 104. This helps to reduce "hot spots" within the steam generator 104.

The first rear region RA1 may be a left rear region or a right rear region as compared to the longitudinal axis 160. In such an example, in addition to water being directed toward the rear end 162, water may also be directed toward one side of the steam surface 172. This may help cool "hot spots" that are aligned, for example, with portions of the heating element 144 proximate to the electrical connection 144B.

Preferably, the first rear region RA1 is closed by a first transverse rib LR1, and the first groove 180A extends along the first transverse rib LR 1. This first transverse rib LR1 may help reduce the risk of splashing (in other words, releasing liquid water from the steam generator 104), although the first groove 180A directs water towards the rear end 162 where steam is released downstream towards the steam outlet 110.

In some embodiments, the garment care device 100a,100B,100c further includes a second groove 180B disposed in the steam surface 172, the second groove 180B extending toward a second rear region RA2 of the steam surface 172, as shown in fig. 4D. In such an embodiment, the primary groove 176, the first groove 180A, and the second groove 180B are fluidly connected at the second end 179.

Preferably, the second rear region RA2 is opposite the first rear region RA1, compared to the longitudinal axis 160 of the steam surface. In contrast, it generally refers to an arrangement in which the first and second rear regions RA1, RA2 are arranged on different sides with respect to the longitudinal axis 160, symmetrically or asymmetrically with respect to the longitudinal axis 160. Thus, the first and second grooves 180a,180b may define a pair of split grooves extending outwardly from the second end 179.

Each of the first and second grooves 180a,180B may extend toward a respective portion of the heating element 144 proximate one of the electrical connections 144B, as best shown in fig. 4D. Thus, the first and second grooves 180a,180B help to transport water to and thereby cool "hot spots" that are aligned with portions of the heating element 144 proximate the electrical connection 144B.

The first recess 180A and/or the second recess 180B may (each) have a thickness, for example, in the range [0.5; a depth (e.g., maximum depth) within 5 mm (such as [1.5;3] mm).

Alternatively or additionally, the first recess 180A and/or the second recess 180B may (each) have a value in the range [1.0; a width (e.g., maximum width) within 5.0 millimeters (e.g., [2.0;5.0] millimeters).

The depth of the first groove 180A may correspond to the height of the first groove 180A between the bottom surface of the first groove 180A and the steam surface 172 at a given point along the first groove 180A. The depth of the second recess 180B may be similarly measured.

The width of the first groove 180A may be measured transverse to the direction of extension of the first groove 180A toward the first rear region RA1, between opposite points at which the first groove 180A meets the steam surface 172 at given points along the first groove 180A. The width of the second groove 180B may be similarly measured.

Preferably, the second rear region LR2 is closed by a second transverse rib LR2 in which the second groove 180B extends along the second transverse rib LR 2. This second transverse rib LR2 may help reduce the risk of splashing (in other words, releasing liquid water from the steam generator 104), although the second groove 180B directs water towards the rear end 162 where steam is released downstream towards the steam outlet 110.

In the non-limiting example shown in fig. 4A-4E and 4I, the first rear region RA1 is closed by a first transverse rib LR1 and the second rear region RA2 is closed by a second transverse rib LR2, with the first groove 180A extending along the first transverse rib LR1 and the second groove 180B extending along the second transverse rib LR 2. Thus, both transverse ribs LR1, LR2 function to reduce the risk of splash water, although the first and second grooves 180a,180b direct water toward the rearward end 162.

Returning to fig. 4A and 4B, protruding elements 168 extend away from steam surface 172. The cavity 170 is arranged such that the temperature sensing element is in thermal contact with the interior of the steam generator 104 when received in the cavity 170.

Protruding element 168 is preferably positioned on longitudinal axis 160. Such centering of the protruding element 168 may aid in feedback control of the electric heater 144, as the center of the steam generator 104 provides a representative location for sensing temperature. The positioning of the temperature sensing elements of the temperature sensor 152 will be described in more detail below.

The loop formed by the heating element 144 preferably includes a pair of curved portions 174a,174b that are bowed inwardly toward one another in the direction of the longitudinal axis 160.

In the non-limiting example shown in fig. 4B, a pair of curved portions 174a,174B are arranged to heat the central region CA of the steam generator 104 faster.

Preferably, the protruding element 168 is raised away from the steam surface 172 at a location between the pair of curved portions 174a,174 b. This helps to make the temperature sensing element more sensitive to the heating provided by the electric heater 144.

This proximity of the curved portions 174a,174b relative to the protruding element 168, and particularly the temperature sensing element received therein, may enhance responsiveness to feedback control on the electric heater 144.

In the non-limiting example shown in fig. 4B, the protruding element 168 is disposed at a location along the longitudinal axis 160 where the pair of curved portions 174a,174B are closest to each other.

More generally, the temperature sensing element is located between opposing portions of the heating element 144, and the lateral distance between the temperature sensing element and one of the opposing portions is preferably the same or substantially the same as the lateral distance between the temperature sensing element and the other of the opposing portions.

In order to allow water to easily spread over the steam surface 172, a smooth steam surface 172 may be desired without any impediment to water. However, such a smooth steam surface 172 may increase the risk of spalling of the steam promoter coating on the steam surface 172 due to the different coefficients of expansion of the material (e.g., aluminum) and scale whose surfaces define the steam surface 172. Furthermore, there is an increased risk of splashing due to flaking of the steam promoter from a relatively large area of the steam surface 172, particularly for relatively high steam rate systems.

Thus, in some embodiments, the laundry care device 100a,100b,100c includes protrusions 188A, such as a pattern of protrusions 188A, protruding from the steam surface 172.

Fig. 4F provides an enlarged perspective view of the steam surface 172 of the steam generator 104 shown in fig. 4A-4E and 4I, showing the protrusions 188A. Fig. 4G provides a plan view of a single protrusion 188A, and fig. 4H provides a plan view of the nearest neighbor protrusion 188A.

Such protrusions 188A may help to spread water relatively quickly over the steam surface 172, thereby promoting steam response, and also help to minimize the detrimental effects of steam promoter flaking off of the steam surface 172.

Preferably, the projections 188A are arranged in circular symmetry about the first end 178. This circular symmetry is represented in fig. 4E by concentric circles 189 about the protrusion 188A of the first end 178. This may help the water to spread more evenly around the water supply point DP, as indicated by the arrow in fig. 4E.

Such projections 188A may have any suitable shape. In some embodiments, each protrusion 188A is shaped according to any one of the following three-dimensional shapes:

the shape of the cone is a shape of a cone,

the shape of a truncated cone is that of a cone,

dome shape.

Such a shape may allow water to flow more easily than protrusions 188A having edges (e.g., cubes, or pyramids). In principle, any shape that does not define corners or edges is contemplated.

The base of the cone or dome shaped projection 188A may be, for example, elliptical rather than circular.

Preferably, the distance D1 between two adjacent (in other words nearest adjacent) projections 188A along the radial direction of the projections 188A is in the range [3 ] as measured at the location where the base of the projections 188A meets the steam surface 172; 8 mm, for example 3.5 mm.

As shown in fig. 4F and 4H, this spacing D may help to efficiently direct and disperse water around the water supply point DP without too much obstruction. The spacing D between the projections 188A may help evaporate water around the projections 188A even when scale is present. Scale has been found to adhere to the protrusion-evaporation surface interface. The water droplets may remain at such an interface for a sufficient time to evaporate.

The projection 188A itself may have any suitable dimensions. Referring to fig. 4G and 4H, a diameter D2 of the base of each protrusion 188A where the protrusion 188A intersects the steam surface 172 is, for example, in the range [1;3 mm. Such a diameter D2 may balance the performance and manufacturability of the steam generator, for example by casting. In the non-limiting example shown in fig. 4G and 4H, D2 is 1 millimeter.

Alternatively or additionally, the height of each projection 188A is in the range [0.5;2 mm.

When tapered projection 188A is used, any suitable angle (acute angle) between steam surface 172 and the side surface of projection 188A may be used. For example, the angle is in the range [14;88 degrees, preferably 70 degrees, and the base of the protrusion has a width of 1mm and a height of 0.8 mm.

The steam generator 104 preferably includes a primary steam zone 182 (defined by the large dashed line in fig. 4A), a secondary steam zone 184 (defined by the small dashed line in fig. 4A) and a steam channel 186 to distribute steam toward the steam outlet. A majority of the steam generation occurs in the primary steam zone 182.

In the non-limiting example shown in fig. 4A, the steam surface 172 is located in the primary steam zone 182.

The steam channels 186 serve to direct steam downstream toward the steam outlets 110. The secondary steam zone 184 provides an intermediate chamber between the primary steam zone 182 and the steam channel 186, which helps mitigate the risk of liquid water flowing downstream to the steam outlet 110.

Preferably, additional protrusions 188B, such as a pattern of additional protrusions 188B, are provided in the secondary steam zone 184 of the steam generator 104. The additional protrusions 188B protrude in the direction of the cover 140. The additional projections 188B may have any suitable shape and size, such as the shape and size described above with respect to projections 188A.

In the non-limiting example shown in fig. 4A-4E and 4I, nearest neighboring further protrusions 188B are more closely spaced from each other than is the case with nearest neighboring protrusions 188A in the primary steam zone 182. This reflects in part the fact that diffusion of water in the secondary steam zone 184 is less of a concern because the primary steam zone 182 is arranged such that most of the water evaporation occurs upstream of the secondary steam zone 184, as previously described.

Additional protrusions 188C, such as a pattern of additional protrusions 188C, are preferably disposed in the steam channel 186 of the steam generator 104. The additional protrusion 188C protrudes in the direction of the cover 140. The additional projections 188C may have any suitable shape and size, such as the shape and size described above with respect to projections 188A.

In the non-limiting example shown in fig. 4A-4E and 4I, nearest neighbor additional projections 188C are more closely spaced from each other than is the case with nearest neighbor projections 188A in main steam zone 182. The nearest neighbor spacing of the additional projections 188C may be, for example, substantially the same as, or smaller or larger than the nearest neighbor spacing of the additional projections 188B in the secondary vapor region 184.

In the case of the non-limiting examples shown in fig. 4A-4E and 4I, the primary steam zone 182, the secondary steam zone 184 and the steam channel 186 are closed by the cover 140 when the cover 140 is secured to the steam generator 104.

This securing of the cover 140 to the steam generator 104 may be accomplished in any suitable manner. In the non-limiting example shown in fig. 4A-4E and 4I, the steam generator 104 defines apertures 190 that receive fasteners (not visible in fig. 4A and 4B) such as screws to secure the cover 140 to the steam generator 104.

Although not visible in fig. 4A-4E and 4I, the garment care apparatus 100a,100b,100c preferably includes a housing for enclosing the components of the hand unit 114. Such a housing may be secured to the bottom plate 108, for example.

This securing of the housing to the bottom plate 108 may be accomplished in any suitable manner. In the non-limiting example shown in fig. 4A-4E and 4I, a fastening element such as a screw received in the hole 192 is used for this purpose.

Thermal fuse assembly 156 described above with respect to fig. 2 is preferably secured to protruding element 168. To this end, the protruding element 168 defines a recess 194 for receiving a suitable securing element (not visible in fig. 4A and 4B), such as a screw, for securing the thermal fuse assembly 156 to the protruding element 168.

Fig. 4I provides a perspective view of the steam generator 104 shown in fig. 4A. A wall 196 extends around the steam generator 104 and separates the different portions of the steam generator 104. A majority of the wall 196 engages the cover 140 to retain steam within the steam generator 104.

The first transverse rib LR1 preferably includes a first rear portion 198A proximate the rear of the garment care device 100a,100b,100c, the first rear portion 198A extending to contact the cover 140 of the steam generator 104. Alternatively or additionally, the second transverse rib LR2 can include a second rear portion 199A proximate to the rear of the garment care device 100a,100b,100c, the second rear portion 199A extending to contact the cover 140 of the steam generator 104 as shown in fig. 4I.

The first and second rear portions 198a,199a help to retain liquid water in the main steam zone 182, for example, even during relatively severe forward and backward ironing strokes.

As shown in fig. 4I, the first transverse rib LR1 further includes a first front portion 198B which is farther from the rear of the garment care device than the first rear portion 198A. The first front 198B extends away from the steam surface 172 toward the cover 140, but terminates short of the cover 140 to allow steam in the primary steam zone 182 to enter the secondary steam zone 184.

Similarly, the second transverse rib LR2 further includes a second front portion 199B, the second front portion 199B being farther from the rear of the garment care device than the second rear portion 199A. The second front 199B extends away from the steam surface 172 toward the cover 140, but terminates short of the cover 140 to allow steam in the primary steam zone 182 to enter the secondary steam zone 184.

As shown in fig. 5, the cover 140 includes a dosing hole 202, and water may be supplied to the water supply point DP through the dosing hole 202. The feed head 138 may be sealed to the cap 140, for example, by a feed seal 142 disposed about the feed aperture 202, as previously described with respect to fig. 2.

The cover 140 is secured to the steam generator 104 by fasteners 204. In this particular example, the fastener 204 takes the form of a screw that is threaded into the aforementioned aperture 190 provided in the steam generator 104.

The garment care device 100a,100b,100c preferably includes a thermal fuse assembly 156 as previously described. In the non-limiting example shown in fig. 5, the thermal fuse assembly 156 is secured to the steam generator 104 via a securing element 206. In this example, the fixing element 206 takes the form of a screw which is screwed into a recess 194 arranged in the protruding element 168.

The temperature sensor 152 included in the laundry care apparatus 100a,100b,100c may be fixed to the steam generator 104 via a further fixing element 208. In this non-limiting example, the additional securing element 208 is a screw that is threaded into an aperture (not visible in fig. 5) disposed in the cover 140.

Fig. 6 provides a cross-sectional view of the steam generator 104. As shown in fig. 6, the steam surface 172, on which water for generating steam is received, is preferably inclined between a higher point 210 and a lower point 212, compared to the treatment surface 109.

In other words, the steam surface 172 is preferably sloped downwardly in the direction of the wider rear end 162 of the steam generator 104. This means that when the treatment surface 109 is oriented horizontally, for example by being placed on a horizontal surface of an ironing plate (not shown), water flows on the steam surface 172 away from the water supply point DP and towards the rear end 162.

Fig. 7 provides a cross-sectional view of the steam generator 104, which shows the inclined steam surface 172 and the temperature sensor 152, the temperature sensing element 216 (shown by the black dots) of the temperature sensor 152.

Fig. 8 provides an enlarged view of a partial cross-sectional view of the steam generator 104 shown in fig. 7, wherein the temperature sensing element 216 is shown by a black dot.

Any suitable angle of inclination θ as shown in fig. 8 may be selected to control the flow of water. Preferably, the steam surface 172 is inclined at an angle θ in the range of 2 degrees to 10 degrees, such as about 5 degrees, relative to the treatment surface 109.

The angle θ may be determined, for example, by measuring the angle θ between a horizontal line drawn parallel to the treatment surface 109 and the steam surface 172 at the lower point 212, as shown in fig. 8.

In the non-limiting example depicted, the higher point 210 of the steam surface 172 extends from the point at which the steam surface 172 intersects the sidewall surface 214 of the steam generator 104. This point may be identified by a shallower depth of the steam surface 172 relative to the depth of the sidewall surface 214.

It should also be noted that the upper points 210 and lower points 212 are points on the steam surface 172 itself, regardless of whether the steam surface 172 has some protrusions or depressions on its surface.

The temperature sensing element 216 of the temperature sensor 152 is preferably arranged at a height H between the upper point 210 and the lower point 212. The advantage of this location is that the signal generated by the temperature sensor is sensitive to both the heating provided by the electric heater 144 and the heat loss due to the presence of water within the steam generator 104.

The upper point 210, lower point 212, and height H may be determined by their distance protruding from the treatment surface 109.

The term "between the higher and lower points" as used herein is intended to encompass a height H aligned with the higher point 210 or with the lower point 212.

The dashed line 218 in fig. 6-8 is aligned with the upper point 210 and parallel to the plane of the treatment surface 109. Similarly, the dashed line 220 in fig. 6-8 is aligned with the lower point 212 and parallel to the plane of the treatment surface 109.

In the non-limiting example shown in fig. 7 and 8, the temperature sensor 152 is a needle thermistor that includes a temperature sensing element 216 in the form of a thermistor element. In this case, the sensing point of the thermistor element is arranged at a height H between the upper point 210 and the lower point 212.

In this particular example, the cavity 170 is in the form of a pinhole sized to receive the thermistor element of a needle thermistor.

However, the inclusion of a thermistor or a temperature sensor 152 in the form of a thermistor (e.g., a needle thermistor) should not be considered limiting. Any suitable type of temperature sensor 152 is contemplated, such as a thermal diode or a miniaturized mechanical thermostat.

A thermal diode may be considered a thermally operated semiconductor switch. The miniaturized mechanical thermostat includes a miniaturized internal thermally operated switch.

Returning to the non-limiting example shown in fig. 6-8, a temperature sensing element 216, in this case in the form of a thermistor element, is received in the cavity 170 defined by the protruding element 168. The cavity 170 extends far enough in the direction of the process plate 109 to meet the height H criteria described above, as shown.

As best shown in fig. 8, the temperature sensor 152 included in the example laundry care apparatus 100a,100b,100c is fixed to the steam generator 104 via a further fixing element 208 in the form of a screw, for example screwed into an aperture 222 arranged in the cover 140.

Fig. 9 provides a cross-sectional view along axis AA of fig. 4B and shows heating element 144 at the location of curved portions 174a, 174B.

More generally, (the central region of) the heating element 144 is arranged, for example, at a height H1, which height H1 is lower than the lower point 212 of the steam surface 172.

It has been found that the above-described design provides enhanced temperature control due, at least in part, to positioning the temperature sensor 152, and in particular the temperature sensing element 216 of the temperature sensor 152, near the second end 179 of the main groove 176. This helps the water to reach and cool the central area CA where the temperature sensing element 216 is located more quickly. In this manner, the temperature sensing element 216, such as a thermistor element, may be effectively responsive to heat transferred by the electric heater 144 and heat extracted by the water, which may make the overall system very sensitive during drying and steam cycles.

In addition, cooling of hot spots of the steam generator 104 is improved due to the effective water distribution provided by the first and/or second grooves 180a,180b extending from the second end 179 of the main groove 176.

In some embodiments, the positioning of the temperature sensing element 216 between the upper and lower points 210, 212 of the steam surface 172 also helps to provide more responsiveness to the cooling provided by the water on the steam surface 172 and the heating provided by the electric heater 144.

In the above examples shown in fig. 4A to 9, the steam surface 172 is inclined with respect to the treatment surface 109. In such an example, it is preferable that the angle θ of the steam surface 172 is such that it extends parallel to the bottom surface of the main groove 176. This further helps to more effectively divert water to the rear of the laundry care device 100A,100B,100c, particularly when the water supplied into the steam generator 104 cannot be fully contained within the first recess 180A and/or the second recess 180B (when the second recess 180B is present).

Fig. 10 schematically depicts an alternative example in which the steam surface 172 remains parallel to the treatment surface 109, while the bottom surface 230 of the main recess 176 is inclined relative to the treatment surface 109.

In such an example, the primary groove 176 becomes progressively deeper toward the second end 179. Thus, in the non-limiting example shown in FIG. 10, the maximum depth 232 may be used as a measure of the depth of the primary groove 176.

Regardless of whether the steam surface 172 is inclined relative to the process surface 109, FIG. 10 illustrates the angle at which the bottom surface 230 of the primary recess 176 is inclined relative to the process surface 109The angle between the horizontal line drawn parallel to the treatment surface 109 and the bottom surface 230 can be measured at the second end 179>To determine.

The above-described embodiments are merely illustrative and are not intended to limit the technical methods of the present invention. Although the invention has been described in detail with reference to preferred embodiments, it will be understood by those skilled in the art that the technical method of the invention may be modified or equivalently replaced without departing from the scope of the claims of the invention. In the claims, the word "comprising" does not exclude other elements or steps, and the indefinite article "a" or "an" does not exclude a plurality. Any reference signs in the claims shall not be construed as limiting the scope.

Claims (15)

1. A laundry care device (100 a,100b,100 c) comprising:

a treatment surface (109) for treating the laundry,

a steam generator (104) in thermal contact with the treatment surface, wherein the steam generator is configured to be heated by an electric heater (144), the steam generator comprising a steam surface (172) having a water supply point (DP) arranged to receive water for generating steam,

A temperature sensor (152) having a temperature sensing element (216) for generating a signal for controlling the electric heater, the temperature sensor being arranged in a Central Area (CA) of the steam surface,

a main recess (176) arranged in the steam surface, the main recess having a first end arranged near the water supply point and a second end arranged near the central area for transporting water between the water supply point and the central area, the main recess having a bottom surface (230) inclined compared to the treatment surface,

a first groove (180A) arranged in the steam surface, the first groove extending towards a first rear region (RA 1) of the steam surface, wherein the main groove and the first groove are fluidly connected at the second end.

2. Laundry care device according to claim 1, wherein the first rear region is closed by a first transverse rib (LR 1) along which the first groove extends.

3. Laundry care device according to claim 1 or 2, further comprising a second groove (180B) arranged in the steam surface, the second groove extending towards a second rear region (RA 2) of the steam surface, the main groove, the first groove and the second groove being fluidly connected at the second end.

4. A laundry care apparatus according to claim 3, wherein the second rear region is closed by a second transverse rib (LR 2) along which the second groove extends.

5. The laundry care apparatus according to any one of claims 1 to 4, comprising a protrusion (188A) protruding from the steam surface.

6. The garment care device of claim 5, wherein the protrusions are arranged in circular symmetry about the first end.

7. The laundry care device according to claim 5 or 6, wherein each of the protrusions is shaped according to any one of the following three-dimensional shapes:

the shape of the cone is a shape of a cone,

the shape of a truncated cone is that of a cone,

the shape of the dome is that of the dome,

a cylindrical shape.

8. Laundry care apparatus according to any one of claims 5 to 7, wherein a distance (D1) between two adjacent protrusions in a radial direction of the protrusions is in the range [3;8 mm.

9. The laundry care appliance of any one of claims 1 to 8, wherein the bottom surface of the main recess is compared to the treatment surface to be in the range [2; an angle tilt within 10 degrees.

10. Laundry care device according to any one of claims 1 to 9, wherein the steam surface is inclined between a high point (210) and a low point (212) compared to the treatment surface, the temperature sensing element being arranged at a height (H) between the high point and the low point, the high point, the low point and the height being determined according to the distance of their projection from the treatment surface.

11. The laundry care appliance according to any one of claims 1 to 10 wherein the temperature sensing element is arranged in a position such that its perpendicular projection coincides with an area of the electric heater where the heating element does not extend.

12. The laundry care apparatus according to any one of claims 1 to 11, further comprising a protruding element (168) arranged in the steam generator for mounting the temperature sensor.

13. The garment care device of claim 12, wherein the electric heater comprises a heating element that is generally U-shaped, the heating element comprising a pair of curved portions (174 a,174 b) that are bowed inwardly toward each other in the direction of a longitudinal central axis (160) of the steam generator, and wherein the protruding element protrudes away from the steam surface at a location between the pair of curved portions.

14. The laundry care apparatus according to any one of claims 1 to 13, further comprising:

a base (112) comprising a water tank (102),

a hand unit (114) comprising the steam generator, and

a hose line (116) for carrying water from the tank to the steam generator.

15. The laundry care apparatus according to any one of claims 1 to 13, further comprising:

a hand unit (114),

water tank (102)

A pump (106) for supplying water from the water tank to the steam generator, wherein the steam generator, the water tank and the pump are arranged in the hand unit.