MXPA06009061A - Apparatus and method for cleaning and de-icing - Google Patents

Abstract

A windshield heated liquid spray assembly including a liquid heating assembly and a heated liquid spray assembly operative to spray the heated liquid onto a windshield, the liquid heating assembly including a liquid heating chamber, at least one heating element disposed in the liquid heating chamber and at least one heat dissipator in heat conduction contact with the at least one heating element, the at least one heat dissipator at least partially defining at least one liquid flow channel and being operative to transfer heat from the at least one heating element to the liquid flowing through the at least one liquid flow channel.

Description

ZW), Eurasian (AM, AZ, BY, KG, KZ, MD, RU, TJ, TM), For two-letter codes and other abbreviations, refer to the "GuidEuropean (AT, BE, BG, CH, CY, CZ , DE, DK, EE, ES, FI, ance Notes on Codes andAbbreviations "appearing at the begin- FR, GB, GR, HU, IE, IS, IT, LT, LU, MC, NL, PL, PT, RO, no ofeach regular issue of the PCT Gazette SE, SI, SK, TR), OAPI (BF, BJ, CF, CG, Cl, CM, GA, GN, GQ, GW, ML, MR, NE, SN, TD, TG ). Published: - without intemational search report and to be republished upon receipt of that report DEVICE AND METHOD FOR CLEANING AND DEFROSTING Background of the Invention The following publications are believed to represent the current state of the art: US Patents: 6,199,587; 6,164,587; 5,988,529; 5,947,348; 5,927,608; 5,509,606; 5,383,247; 5,354,965; 5,254,083; 5,118,040; 5,012,977; 4,106,508; 4,090,668 and 3,979,068. Published PCT applications: WO 02/092237, WO 00/27540, WO 98/58826. Brief Description of the Invention The present invention seeks to provide an improved device and method for cleaning and thawing elements of a vehicle. Also provided in accordance with a preferred embodiment of the present invention is a hot windscreen liquid spraying assembly that includes a liquid heater assembly and a spray assembly of the hot liquid operating hot spray liquid on a windshield, mounting of liquid heating including a liquid heating chamber, at least one heating element arranged inside the liquid heating chamber and at least one heat sink in contact for heat conduction with at least one heating element, at least one of the heat sinks of Ref .: 174926 heat defines at least partially a liquid flow channel and is operative from the heat transfer of at least one heating element so that the liquid flows through at least one Fluid flow channel. Also provided in accordance with another preferred embodiment of the present invention is a hot windscreen fluid spraying assembly including a liquid heating assembly and a spray assembly of the hot liquid operating hot spray liquid on a windshield, mounting for heating the liquid including a liquid heating chamber, in at least one heating element arranged in the liquid heating chamber and a connection for the supply of electrical energy to at least one heating element, the connection for the electric power supply includes a conductive portion that can be fused in contact for the conduction of the heat with the liquid heating chamber and is operable from the melt, and thus interrupt the supply of electric power to at least one heating element in response to the heating of the liquid in the heating chamber of the liquid above the predetermined temperature. Further provided in accordance with yet another preferred embodiment of the present invention is a spray assembly of the hot windshield fluid including a liquid heating assembly, a working liquid temperature sensor for detecting a temperature of the heated liquid by the mounting of the liquid. heating of the liquid, a spray assembly of hot operating liquid to spray the hot liquid on a windshield and an operant controller to control the operation of the spray assembly according to the temperature detected by the liquid temperature sensor, - "the" The controller provides at least a first spray case that starts when the liquid temperature is at a first temperature and ends when the liquid temperature is at a second temperature, below the first temperature, and at least one second spray case that ends when the temperature of the liquid is at a third temperature, below the second temperature. Preferably, the spraying assembly of the hot windscreen liquid also includes an operating temperature sensor for detecting an outside ambient temperature of the liquid heating assembly. Additionally, the third temperature is determined by means of the controller based on the ambient temperature. Additionally, the controller is operable to determine in at least one first spray case if the second temperature is not reached within a predetermined time. Additionally or alternatively, the controller is operable to terminate at least one second spray event if the third temperature was not reached within a predetermined time. Preferably, at least a second spray case is initiated when the temperature of the liquid is at the first temperature. Additionally, the liquid heating assembly also includes a connection for supplying electric power to at least one heating element, the connection for the electric power supply includes a conductive portion that can be fused in contact for heat conduction. with the liquid heating chamber and which is operable to melt, and thus interrupt the electrical power to at least one heating element in response to heating of the liquid in the liquid heating chamber above a predetermined temperature. Preferably, the spray assembly of the hot windscreen liquid also includes at least one heat sink in contact for heat conduction with at least one heating element, at least one heat sink at least partially define at least one channel of liquid flow and is operable to transfer heat from at least one heating element to the liquid flowing through at least one flow channel of the liquid.

Preferably, the hot liquid spray assembly of the windshield also includes a working liquid temperature sensor for detecting a hot liquid temperature by the liquid heating assembly. Preferably, at least one heat sink is configured and is operative to improve the homogeneity of the heating of the liquid in the liquid heating chamber, by means of which the temperature is detected by the temperature sensor of the liquid is generally representative of the temperature of the liquid inside the liquid heating chamber. Additionally or alternatively, at least one heating dissipator is configured so that it is not uniform along at least one dimension of the liquid heating chamber. Preferably, at least one heat sink is configured to extend along a longitudinal axis, which is designed to be vertically aligned and not uniform. along the longitudinal axis, thereby improving the homogeneity of the heating of the liquid along it. Preferably, at least one heat sink includes at least one communication opening with at least one flow channel of the liquid. Preferably, at least one dissipater is "located within the heating chamber to define at least one fluid flow recess In addition, at least one fluid flow recess causes fluid to flow into the reheating chamber of the fluid. liquid in multiple directions Further or alternatively, at least one heat sink is configured to extend along a longitudinal axis and where fluid flows in multiple directions includes fluid flow in the opposite longitudinal directions along the axis Preferably, the flow of the fluid in multiple directions provides improved homogeneity of the liquid temperatures in the liquid heating chamber, Further provided in accordance with yet another preferred embodiment of the present invention is a hot liquid spray assembly of the liquid. windshield including a liquid heating assembly and a liquid spray assembly operable hot liquid for spraying the hot liquid on a windshield, the liquid heating assembly including a liquid heating chamber, at least one heating element disposed in the liquid heating chamber and a liquid supply assembly coupled to the liquid heating chamber and includes an operating valve to allow the flow of the liquid within the liquid heating chamber and to prevent backflow from the liquid heating chamber and at least one through passage, the user is selectively operable to allow backflow to the valve passage. Still further is provided according to another preferred embodiment of the present invention a method for spraying hot liquid onto a windshield which includes providing a heating assembly for the liquid including a liquid heating chamber, at least one heating element arranged in the liquid heating chamber and at least one heat sink in contact for conducting heat with at least one heating element, at least one heat sink defining at least partially at least one flow channel of the liquid, heating at least one heating element, transferring heat from at least one heating element to the liquid flowing through at least one liquid flow channel and spraying the hot liquid through the liquid heating assembly onto a windshield . Still further is provided according to yet another preferred embodiment of the present invention a method for spraying hot liquid onto a windshield including a liquid heating assembly including a liquid temperature sensor, heating a liquid in the heating assembly of the liquid until a start temperature of the first spraying cycle is detected by the liquid temperature sensor, starting at. minus a first case of spraying when the start temperature of the first spraying cycle is detected by the liquid temperature sensor, ending the first case sprayed, when the temperature of the end of the first spraying cycle that is below is detected of the start temperature of the first spraying cycle, subsequently initiated at least a second spraying event when the start temperature of the second spraying cycle is detected by the liquid temperature sensor and the second spraying event ends when the spraying is detected. At the end of the second spraying cycle temperature by the liquid temperature sensor, the temperature at the end of the second spraying cycle is below the end temperature of the first spraying cycle. BRIEF DESCRIPTION OF THE DRAWINGS The present invention will be fully understood and appreciated with the following detailed description, taken in conjunction with the drawings in which: Fig. 1 is a simplified sectional illustration of a hot liquid discharge system suitable for use in a motor vehicle, constructed and operated in accordance with a preferred embodiment of the present invention; Fig. 2 is a simplified schematic view illustration of the heating chamber of the system of Fig. 1; Figs. 3A and 3B is a simplified pictorial illustration and a simplified elevated view illustration of the heating chamber of Fig. 2. Fig. 4A is a simplified sectional illustration of the heating chamber of Figs. 2-3B, taken along the IVA-IVA lines in Fig. 3B, illustrating the flow of the fluid within it; Fig. 4B is a simplified elevated view of the heating chamber of the liquid of Figs. 2-3B, which illustrate the flow of fluid within it; Figs. 5A and 5B are, respectively, one sectional and the other simplified elevated view of a liquid heating assembly suitable for use in the hot liquid discharge system of Fig. 1 according to another preferred embodiment of the present invention; Figs. 6A and 6B are, respectively, one sectional and the other simplified elevated view of a liquid heating assembly suitable for use in the hot liquid discharge system of Fig. 1 according to yet another preferred embodiment of the present invention. invention; Figs. 7A and 7B are simplified sectional illustrations of an electrical power supply connection to the hot liquid discharge system of Fig. 1 according to yet another preferred embodiment of the present invention, prior to overheating and subsequent to overheating, respectively; Fig. 8 is a simplified illustration of a hot liquid discharge system mounted on a motor vehicle, and operable according to another preferred embodiment of the present invention; Fig. 9 is a simplified regulation diagram illustrating the operation of the system of Fig. 8; and Fig. 10A and 10B are simplified sectional illustrations of a hot liquid discharge system suitable for use in a motor vehicle, constructed and operated according to yet another preferred embodiment of the present invention, in two different modes of operation. Detailed Description of the Invention Reference is now made to Fig. 1, where it is a simplified illustration of a hot liquid discharge system suitable for use in a motor vehicle, constructed and operated in accordance with a preferred embodiment of the present invention. . As seen in -Fig. 1, a hot liquid discharge system 100 preferably includes a main assembly 102, which provides for the heating of the liquid and includes functionalities for electrical and flow control. The main assembly 102 is preferably electrically connected by electrical cables (not shown) to a vehicle battery (not shown). The main assembly 102 comprises a liquid heating chamber 104 which communicates with a liquid inflow conduit (not shown) and a liquid effluent conduit (not shown). The liquid affluent conduit is operable for the supply of liquid, such as water, antifreeze or windscreen wiper fluid, from a reservoir of vehicle liquid (not shown), which has a pump associated with the vehicle (not shown) , to the liquid heating chamber 104. The liquid effluent conduit is operable to supply liquid to one or more sprinklers (not shown), which may be placed in one or more of the following locations: the front windscreen of the vehicle, windshield rear of the vehicle, side windows of the vehicle in general and especially in places that provide visual access to the exterior mirrors of the vehicle, headlights, rear lights of the vehicle and exterior mirrors of the vehicle. It is appreciated that the term "vehicle" is used in the context of the present patent application and in the claims can refer to any type of vehicle with windows, such as a car or a truck, as well as a boat. 'or an airplane. The main mount 102 preferably includes a crankcase 106 which generally defines a volume 108 that accommodates the liquid heating cylinder., wherein the heating chamber 104 of the liquid is located, in a larger portion where a liquid heating assembly 110 is disposed. The crankcase 106 also preferably defines a liquid inlet channel 112, a liquid outlet channel 114. and an opening for housing a liquid temperature sensor 116, all in communication with the volume 108 accommodating the liquid heating chamber. Additional reference is now made to Figs. 2, 3A and 3B, which illustrate details of the structure of the liquid heating assembly 110. As seen in Fig. 2, the liquid heating assembly 110 preferably comprises a cylindrical outer circular sleeve 120 which defines the chamber of the liquid. heating of the liquid 104, and a base 122, which defines a washer 124 retaining the sealing ring, arranged to retain an insulating sealing ring of the liquid 126 (Fig. 1). A plurality of heating elements, preferably two, designated by the reference numbers 130 and 132, is located within the sleeve 120. According to a preferred embodiment of the present invention, a heat sink assembly 140, including at least one heat sink, preferably encloses heating elements 130 and 132. The heat sink assembly 140 includes heat sinks 142 and 144, which define the respective liquid flow channels 146 and 148, which are connected thermally and mechanically to the elements of heating 130 and 132, preferably by welding, or any other suitable connection. The heat sink assembly 140 provides efficient heat transfer between the heating elements 130 and 132 and the liquid flowing through the liquid flow channels 146 and 148. The heat sinks 142 and 144 preferably include multiple side openings , designated by the reference numbers 150, -152 and 154, to facilitate the passage of the liquid through them. It is appreciated that the liquid flow channels 146 and 148 provide effective heating of the liquid contained therein. As seen further in Fig. 2 the outer sleeve 120 includes multiple openings, designated 160, 162 and 164 to allow liquid to flow therethrough. It is appreciated that the openings 150, 152 and 154, as well as the openings 160, 162 and 164 can be provided in any suitable amount, location and manner, to facilitate the passage of the liquid through the outer sleeve 120 and the heat sink assembly. 140. In a preferred embodiment of the present invention, a pair of each of the openings 160, 162 and 164 are provided on opposite sides of a vertical axis thereof. It is appreciated that the openings 150, 152 and 154, as well as the openings 160, 162 and 164 are located and sized to provide increased homogeneity in the temperature of the fluid located within the liquid heating chamber 104. The heating assembly of the liquid 110 also preferably includes a connection for the supply of electric power 165 to the base 122. As seen further in Fig. 1, the hot liquid discharge system 100. also includes a liquid-connector assembly 166 which includes a portion "of liquid inlet path 168 and a liquid outlet path portion 170. Liquid connector assembly 166 preferably comprises a molded injection element that also defines a differential pressure bypass path portion 172, the which is controlled by a one-way valve loaded with spring 174 and which allows the flow to flow from the portion of t liquid inlet path 168 towards the liquid outlet path portion 170 when the differential pressure through it reaches a predetermined threshold, typically 0.3-0.5 bar, which indicates the existence of a blockage in the liquid path through the liquid. the liquid heating chamber 104. A valve 176 is disposed in the inlet path portion of the liquid 168 upstream of the liquid heating chamber 104. The valve 176 preferably includes a partial sealing element, such as a ball 177, which allows the supply of liquid under pressure to the volume 108 which accommodates the liquid heating chamber but restricts backflow through it with a relatively slow speed. Alternatively, the ball 177 of the valve 176 can be prevented to allow backflow with a relatively faster speed than the counterflow otherwise provided by the valve 176 with the ball 177. The liquid in the vehicle reserve is supplied to the volume 108 which houses the liquid heating chamber by means of the inlet path portion of the liquid 168 and the liquid inlet channel 112 and preferably enters the liquid heating chamber 104, defined by the sleeve 120, via the openings 160, 162 and 164 formed in the sleeve 120. The liquid is heated in the liquid heating chamber 104 and the temperature of the liquid or air superimposed on the liquid is detected, depending on the liquid level, by means of the temperature sensor 116, preferably a sensor commercially available from EPCOS AG. Corporate Communications of Munich, Germany, identified by Catalog No. G560 / 50K / F2. The temperature sensor 116 is preferably mounted on a printed circuit board 178 which is mounted inside the crankcase 106 and is located outside the volume accommodating the liquid heating chamber 108. Also mounted on the printed circuit board 178 is the control circuit for operation. of the main assembly 102 which is connected inter alia to the temperature sensor 116 and the vehicle battery. Reference is now made to Figs. 4A and 4B, which are simplified illustrations of the liquid flow within the liquid heating chamber 104. According to a preferred embodiment of the present invention, the heat sinks 142 and 144 are positioned relative to the heating elements. 130 and 132 to define the liquid flow channels 146 and 148. The heating elements 130 and 132 are preferably connected to the base 122, preferably by welding. The heat sinks 142 and 144 are placed inside the outer sleeve 120 to define a fluid flow orifice between a lower surface 186 of the heat sink assembly 140 and the upper surface 188 of the base 122. Additionally, the walls of the outer sleeve Cylindrical 120 preferably extend beyond the upper portion 190 of the heat sinks 142 and 144, defining a fluid flow orifice between the upper portion 190 of the heat sink assembly-140 and the uppermost surface 192 of the outer sleeve. cylindrical 120. The fluid flow openings described above, between the lower surface 186 and the upper surface 188, and between the upper surface 190 and lower surface 192, allow the fluid to flow in multiple directions within the liquid heating chamber 104 as It is described right away. - - As seen in Fig. 4A, the hot fluid generally flows upwardly within the heat sinks 142 and 144, as shown by the arrow 20, between the lower surface 186 of the heat sink assembly 140 and the upper part 190 of the heat sink assembly 140. Once the area of the liquid heating chamber 104 is reached above the heat sink assembly 140, some of the fluid flows out of the area above the heat sink assembly 140 and moves inside. of a downward flow, as shown by arrow 202. Unheated fluid entering the liquid heating chamber 104 through the openings 160, 162 and 164 generally flows downwardly within the liquid heating chamber 104 out of the heat sink assembly 140, as shown by the arrow 204. Once the area of the liquid heating chamber 104 below the heat sink assembly 140, some of the fluid flows into the area below the heat sink assembly 140 and moves within an upward flow, as shown by arrow 206. The fluid flows indicated by arrows 200, 202, 204 and 206 in multiple directions generated by the differences in fluid temperature inside the liquid heating chamber 104. Preferably, all the time the fluid flows indicated by the arrows 200, 202, 204 and 206 produces an increasing uniformity of the liquid temperature in the liquid heating chamber 104. The arrangement of the heat sink assembly 140 within the liquid heating chamber gone 104, which provides for the fluid to flow in multiple directions, resulting in an increasing uniformity of temperature and heating efficiency when compared to the heating units of the prior art. As seen further in Fig. 4A, the liquid also flows through the openings 150, 152 and 154 providing the additional fluid flows indicated by the arrows 208 and 210. It is seen that the liquid enters the heat sinks 142 and 144 through the openings 150, 152 and 154, as shown by the fluid flow indicated by the arrow 208, moves partially within the upward flow, by the outgoing flow within the channels of the liquid flow 146 and 148, and partially within a downflow, when it is at a lower temperature than the liquid within the liquid flow channels 146 and 148. Similarly, the liquid exiting the heat sinks 142 and 144 through the openings 150, 152 and 154, as shown by the fluid flow indicated by the arrow 210, move partially within a downward flow, by the outflow into the liquid heating chamber 104 out of the channels of the f liquid 146 and 148, and partially within the upflow, when it is at a higher temperature than the liquid inside the liquid heating chamber 104 outside the liquid flow channels of the liquid 146 and 148. As is shown below, the multiple fluid flows preferably provide a generally homogeneous temperature distribution within the liquid heating chamber 104 and therefore the measurement of the temperature of the liquid in the outlet opening generally provides an indication representative of the average temperature of the liquid within the liquid. the heating chamber 104. Managing the temperature and flow controls of the hot liquid discharge system 100, made in accordance with the measurement of the temperature of the liquid at this point, provides improved homogeneity of the temperature of the hot liquid in the chamber of liquid heating 104. Specifically, the system of RGA of the hot liquid 100, by providing improved homogeneity of the liquid temperatures found herein, provides an increasing volume of fluid which is sprayed during a spraying cycle whose duration is governed by the temperature of the liquid detected by the temperature sensor. . By . consequently, by providing improved homogeneity of the liquid "" temperatures found here, the hot liquid discharge system 100 provides an increasing amount of heat energy transferred to the windshield by the hot liquid during a given spraying cycle. It is appreciated that this feature of providing a generally homogeneous temperature distribution within the liquid heating chamber 104 allows the heating system of the. present invention improving the windshield heating which conforms to the requirements and specifications of the vehicle manufacturers, which define a maximum limit of the temperature of the liquid allowed for hot spraying. Reference is now made to Figs. 5A and 5B, which are simplified sectional and elevated view illustrations of a liquid heating assembly suitable for use in the hot liquid discharge system of Fig. 1 according to another preferred embodiment of the present invention. As seen in Fig. 5A, a liquid heating assembly 250 preferably comprises a circular cylindrical outer sleeve 252 and a base 254, defining a washer 256 retaining the sealing ring, arranged to retain an insulating liquid sealing ring. (not shown). A plurality of heating elements, preferably two, designated by the reference numerals 258 and 260, is located within the sleeve 252. According to a preferred embodiment of the present invention, a heat sink assembly 262, including at least one heat sink, preferably encloses heating elements 258 and 260. The heat sink assembly 262 includes the heat sinks 264 and 266, which define the respectflow channels of the liquid 268 and 270, which are thermally and mechanically connected to the elements 258 and 260, preferably by welding, or any other suitable connection. The heat sink assembly 262 provides efficient heat transfer between the heating elements 258 and 260 and the liquid flowing through the liquid flow channels 268 and 270. The heat sinks 264 and 266 preferably include multiple side openings , designated by the reference numbers 271, 272 and 273, to facilitate the passage of the liquid through them. It is appreciated that the liquid flow channels 268 and 270 provide efficient heating of the liquid contained therein. The outer sleeve 252 includes multiple openings, designated 274, 275 and 276 to allow liquid to flow through them. It is appreciated that the openings 274, 275 and 276, can be provided in any suitable amount, place and form, to facilitate the passage of the liquid through the outer sleeve 252. The fluid from the vehicle reservoir is supplied to the liquid heating assembly 250 by means of the liquid inlet path portion (not shown) and the liquid inlet channel ( not shown) and preferably enters the liquid heating assembly 250, defined by the sleeve 252, via the openings 274, 275 and 276 formed in the sleeve 252. The liquid is heated in the liquid heating chamber 205 and the liquid is detected. temperature of the liquid or air that is superimposed on the liquid, depending on the level of liquid, by means of the temperature sensor (not shown), preferably a commercially available sensor. available from EPCOS AG. Corporate Communications of Munich, Germany, identified by Catalog No. G560 / 50K / F2. According to a preferred embodiment of the present invention, the heat sinks 264 and 266 are positioned relatto the heating elements 258 and 260 to define the liquid flow channels 268 and 270. The heating elements 258 and 260 are they preferably connect to the base 254, preferably by welding.

The heat sinks 264 and 266 are placed inside the outer sleeve 252 to define a fluid flow orifice between a lower surface 280 of the heat sink assembly 262 and the upper surface 281 of the base 254. Additionally, the walls of the outer sleeve cylindrical 252 preferably extends beyond the upper portion 282 of the heat sinks 264 and 266, defining a fluid flow hole between the upper portion 282 of the heat sink assembly 262. and the upper surface 283 of the cylindrical outer sleeve 252. .

The fluid flow openings described above, between the lower surface 280 and the upper surface 281, and between the upper surface 282 and lower surface 283, allow the fluid to flow in multiple directions within the liquid heating assembly 250 as described below. As seen in Fig. 5A, the heat sinks 264 and 266 preferably extend along the longitudinal axis 286 and are not uniform, with variation in thickness, along the longitudinal axis 286. Preferably, the longitudinal axis 286 is designed to be vertically aligned within the liquid heating assembly 250. Preferably, the thickness of the heat sinks 264 and 266 is greatest at locations near the base 254 and decrease along the axis 286 proportionally to the distance of the base 254. It is appreciated that the provision of varying the thickness provides a difference in the transfer of heat to the fluid in regions located near the base 254 compared to the heat transfer to the fluid in the regions located furthest from the base 254 and thus improve the homogeneity of the heating of the liquid inside the heating assembly of the liquid 250. It is seen that the fluid flows from the liquid heating assembly 250 of Figs. 5A and 5B are similar to those described above with reference to Figs. 4A and 4B. Reference is now made to Figs. 6A and 6B, which are simplified sectional and elevated view illustrations of a liquid heating assembly suitable for use in the hot liquid discharge system of Fig. 1 according to another preferred embodiment of the present invention. As seen in Fig. 6A, a liquid heating assembly 310 preferably comprises a circular cylindrical outer sleeve 320 and a base 322, which defines a washer 324 retaining the sealing ring, arranged to retain a ring. sealing liquid insulator (not shown). At least one heating element, designated by the reference numbers 330, is located inside the sleeve 320. According to a preferred embodiment of the present invention, at least one heat sink 340 preferably encloses the heating element. 330. The heat sink 340 is thermally and mechanically connected to the heating element 330, preferably by welding, or any other suitable connection.The heat sink 340 provides an efficient heat transfer between the heating element 330 and the liquid that flow through the liquid heating assembly 310. The outer sleeve 320 preferably includes multiple openings, designated 360, 362 and 364 to allow the liquid to flow through them. It is appreciated that the openings 360, 362 and 364 can be provided in any suitable place and shape, to facilitate the passage of the liquid through the outer sleeve 320. The assembly Liquid heating 310 preferably also includes a connection for the supply of electric power 365 to the base 322.

The fluid from the vehicle reservoir is supplied to the liquid heating assembly 310 by means of the liquid inlet path portion (not shown) and the liquid inlet channel (not shown) and preferably enters the heating assembly of liquid 310, defined by sleeve 320, via the openings 360, 352 and 364 formed in the sleeve 320. The liquid is heated in the heating assembly of the liquid 310 and the temperature of the liquid or of the air superimposed on the liquid is detected, depending on the level of liquid, by means of the temperature sensor (not shown), preferably a "sensor commercially available from EPCOS AG, Corporate Communications of Munich, Germany, identified by Catalog No. G560 / 50K / F2, as seen in Fig. 6A, the dissipator heat 340 preferably comprises at least a plurality of fins 370 extending outwardly from the heating element 330 along the longitudinal axis 372 defined by the heating element 330. According to a preferred embodiment of the present invention, the fins 370 are not uniform, preferably with variation in length and thickness, as described below, along the longitudinal axis 372. Preferably, the longitudinal axis 372 is designed to be vertically aligned within the liquid heating assembly 310. In a preferred embodiment of the present invention at least a plurality of fins includes a first plurality of fins 374 of a first length extending externally from the element of heating 330 and a second plurality of fins 376 of a second length extending externally from the heating element 330, as seen in Fig. 6B. As seen in Fig. 6A, preferably, the first plurality of fins 374 of a first length and the second plurality of fins 376 of the second length include a first group of fins 380 of a first surface area, a second group of fins. 382 of a second surface area and a third group of fins 384 of a third surface area. The fins 380, which are located closer to the base 322 than the fins 382 and the fins 384, have a greater surface area than the fins 382 and the fins 384, to provide additional surface area in contact with the fluid flowing through of the liquid heating assembly 310. The fins 382, which are located closer to the base 322 than the fins 384, have a greater surface area 384, to provide additional surface area in contact with the fluid flowing through the assembly heating of liquid 310. It is noted that the provision of the different groups of fins provides additional surface area in contact with the fluid in regions located closer to the base 322 and improves the homogeneity of the heating of the liquid within the heating assembly of the liquid 310 It is appreciated that, although the illustrated embodiment includes the first, second and third fin groups, the fin groups may be provided with Any configuration, including the two groups or more than three groups, each one includes different surface areas. It is appreciated that the increase in turbulence caused by the fluid striking the fins 370 provides an increase in heat transfer and -the homogeneity in the temperature of the fluid flowing through the liquid heating assembly 310. Now referenced to Figs. 7A and 7B, which are simplified sectional illustrations of an electrical power supply connection to a hot liquid discharge system of Fig. 1 according to yet another preferred embodiment of the present invention, prior to overheating and subsequent to overheating, respectively. As seen in Figs. 7A and 7B, a liquid heating assembly 400 preferably comprises a circular cylindrical outer sleeve 402, which defines a liquid heating chamber 404. The sleeve 402 has a base 414, which defines a washer 416 which retains the sealing ring, arranged to retain an insulating liquid sealing ring (not shown). At least one heating element, designated by the reference number 420, it is located inside the sleeve 420. It is appreciated that even though only one heating element 420 is seen in the illustrated embodiment of Figs. 7A and 7B, the connection for the electric power supply of Figs. 7A and 7B can be used with liquid heating assemblies that include any suitable configuration of heating elements. According to a preferred embodiment of the present invention, the heating assembly of the liquid 400 includes one. connection for the supply of electric power 430, connected to the base 414, preferably by welding. The connection for the electric power supply 430 is part of a circuit that supplies current to the heating element 420. An input of the electric current to the heating element 420 is provided through an electrical connection point 432. From this the fluid flows. current, preferably through the first end of the heating element 420, towards an opposite end of the heating element 420 preferably connected to the metal body of the heating element 420, and from it to the base 414. The current then flows through a connection for the electric power supply 430 to an electrical contact 434. The connection for the electric power supply 430 preferably includes a metal frame suitable for allowing the electric current to flow through it, an insulating layer 442, preferably a layer of plastic, and a fusible conductive portion 444, preferably a portion n of welding, which provides electrical connection between the frame 440 and the electrical contact 434. As described below, under normal operating conditions, the electric current flows through the connection for the electric power supply 430 from the frame 440 , through the fusible conductive portion 444 to the electrical contact 434. The connection for the electric power supply 430 provides a mechanism for disconnecting the flow of the current to the heating element in the event of overheating within the liquid heating chamber 400. , as described later. Under normal operation, the heating element 420 is activated only when the liquid heating chamber 400 already contains a supply of the liquid to be heated. In case the heating element 420 is activated with only a small amount of liquid or without liquid in the liquid heating chamber 404, the liquid heating chamber 404 is likely to rapidly reach a high temperature and overheat. The increase in temperature within the heating chamber of the liquid 404 and the heating element 420 would cause the heating of the base 414 which in turn would cause an increase in the temperature in the frame 440-. When the temperature in the frame 440 exceeds the melting temperature of the fusible conductive portion 444 of the connection for the electrical power supply 430, the fusible conductive portion 444 melts and runs out of the frame 440, as seen in FIG. 7B. The melting of the fusible conductive portion 444 breaks the electrical circuit between the frame 440 and the electrical contact 434 and interrupts the supply of electrical power to the heating element 420. The connection for the electric power supply 430 thus provides a flow termination of current once and provides protection against damage to the vehicle resulting from overheating of the liquid heating chamber 404 caused by a malfunction of the heating system. Reference is now made to Fig. 8, which is a simplified illustration of a hot liquid discharge system constructed and operated in accordance with another preferred embodiment of the present invention mounted on a motor vehicle, and Fig. 9, which is a simplified regulation diagram illustrating the operation of the system of Fig. 8, according to a preferred embodiment of the present invention. As seen in Fig. 8, a motor vehicle of another conventional form 500 is seen to incorporate a hot liquid discharge system 502 constructed and operated in accordance with a preferred embodiment of the present invention. The hot liquid discharge system preferably includes a main assembly 504, which provides heating of the liquid as well as functionalities for the electrical control and the flow of the liquid. The main assembly 504 is electrically connected by electric cables 506 and 507 to a vehicle battery 508. A tributary conduit of the liquid 510 supplies liquid, such as water, antifreeze or windscreen cleaning fluid, from a liquid reservoir of the vehicle 512, having an associated pump of the vehicle 514, to the main assembly 504. An effluent conduit of the liquid 522 supplies liquid to one or more sprinklers 524, which can be located in one or more of the following vehicle locations, the vehicle's front windshield, the rear window of the vehicle, side windows of the vehicle in general and especially in places that provide visual access to the exterior mirrors of the vehicle, lights front, rear lights of the vehicle and exterior mirrors of the vehicle. A vehicle operator actuation switch 530, typically located on the instrument panel of the vehicle, is electrically coupled to the main assembly 504 by means of a pair of control lead wires 532. A pair of lead wires interfacing with the computer of the vehicle. vehicle 534 and 536 interconnect main mount 504 to the existing computer 538 of the vehicle. An ignition interface wire 540 interconnects the main assembly 504 to the existing vehicle ignition switch. An external temperature sensor 541 is connected to the main assembly 504 via the lead wire 543. The vehicle operator actuation switch 530 preferably provides an input to the user to activate the automatic spray cycles described below. The liquid reservoir 512 is supplied via the vehicle pump 514 to the main assembly 504 by means of the liquid inlet conduit 510 and a liquid inlet path portion 550. The liquid is supplied to the sprinklers 524 via a portion. of liquid outlet path 554 and liquid effluent conduit 522. Main assembly 504 preferably includes a liquid heating chamber 560 in communication with a temperature sensor 570, preferably a sensor commercially available from EPCOS AG. Corporate Communications of Munich, Germany, identified by Catalog No. G560 / 50K / F2, and the control circuit for the operation of the main assembly 504 which is connected inter alia to the temperature sensor 570 and the vehicle battery. As seen in Fig. 9, the performance of the system is preferably initiated by a user, such as a driver of the automotive vehicle, eliminating the pressure of the actuation switch.530, typically located on the vehicle's control panel, which is designates by the reference number 600. This action places the system in an automatic activation mode. The system is operable, in this mode, to operate the pump 514 to execute a first spraying cycle and a second spraying cycle, designated by the reference numerals 602 and 604, respectively. Once entering the automatic activation mode, the hot liquid discharge system 502 is operative to provide a current to the heating elements, heating the liquid contained in the heating chamber of the liquid 560, causing an increase in the temperature detected by the sensor 570, as designated by the reference number 606. When the temperature detected by the temperature sensor 570 reaches a: start temperature of the first spraying cycle, 75 ° C in the illustrated example, which is designated by the number 608, the hot liquid discharge system 502 preferably operates the pumps 514 to execute the first spraying cycle 602 and the discharge fluid through the outlet path portion of the liquid 554 and the liquid effluent conduit 522 toward the sprinklers 524. The first spray cycle 602 preferably continues until the temperature sensed by the sensor 570 reaches a final temperature of the first spraying cycle, less than the start temperature of the first spraying cycle, 56 ° C in the illustrated example, which is designated by the reference number 610. In accordance with a preferred embodiment of the present invention, the start temperature of the first spraying cycle and the final temperature of the first spraying cycle is selected such that the duration of the first spraying cycle 602 is preferably about four seconds, during this time the temperature sensed by the sensor 570 reaches the final temperature of the first spray cycle. With the completion of the first spraying cycle 602, the temperature sensed by the sensor 570 starts the increase due to heating. of the fluid contained in the heating chamber of the liquid 560. According to a preferred embodiment of the present invention, the hot liquid discharge system 502 is preferably operable to drive the pump 514 to execute the second spray cycle 604 when the detected temperature the sensor 570 reaches a start temperature of the second spray cycle, 75 ° C in the illustrated example, which is designated by the reference number 612. It can be seen that the start temperature of the second spray cycle can be the same as that of the second spray cycle. the start temperature of the first spray cycle or may be different. The second spraying cycle 604 preferably continues until the temperature detected by the sensor 570 reaches a final temperature of the second spraying cycle, lower than the final temperature of the first spraying cycle and lower than the start temperature of the second spraying cycle. sprayed, such as 5 ° C in the illustrated example, which is designated by the reference numeral 614. According to a preferred embodiment of the present invention, the start temperature of the second spray cycle and the final temperature of the second cycle of Sprays are selected such that the duration of the second spraying cycle 604 preferably does not exceed eight seconds, during which time the temperature detected by the sensor 570 reaches the final temperature of the second spraying cycle. It is appreciated that the flushing system 502 of heated liquid may also be operable with the first sprinkler cycle 602 based on a maximum duration of the first sprinkling cycle, in the event that the final temperature of the first sprinkling cycle is not reached. within the maximum duration time. It is also appreciated that the hot liquid discharge system 502 may also be operative with the end of the second spraying cycle 604 in base - at a maximum duration of the second spraying cycle, in case the final temperature of the second one is not reached. Spray cycle within the maximum duration time. It is appreciated that the given temperatures are only for the purposes of illustration, and that any suitable temperature range can be selected to determine the duration of the first and second spraying cycles. It is appreciated that the times given are for the illustrative purpose only, and that any duration can be selected as the maximum time allowed for the first and second spray cycles 602 and 604. According to another preferred embodiment of the present invention, the hot liquid discharge system 502 may be operable to determine the final temperature of the second spray cycle as a function of the ambient temperature detected by the temperature sensor 541. It is appreciated that determining the final temperature of the second spray cycle as a function of room temperature provides an improvement in the second spray cycle, particularly at very low ambient temperatures, such as 0 ° C. Reference is now made to Figs. 10A and 10B, which are simplified sectional illustrations of a hot liquid discharge system suitable for use in a motor vehicle, constructed and operated in accordance with yet another preferred embodiment of the present invention, in two different modes of operation. As it is shown in Figs. 10A and 10B, a hot liquid discharge system 900, similar to a hot liquid discharge system 100 of FIG. 1, preferably includes a main mount 902, which provides liquid heating and includes electrical control and liquid flow functionalities. The main assembly 902 is preferably electrically connected via electrical cables (not shown) to a vehicle battery (not shown). The main assembly 902 comprises a liquid heating chamber 904 communicating with a liquid inflow conduit (not shown) and a liquid effluent conduit (not shown). The liquid inlet conduit is operative for the supply of liquid, such as water, antifreeze or windshield washer fluid, from a liquid reservoir of the vehicle (not shown), which has an associated vehicle pump (not shown) , with the liquid heating chamber 904. The liquid effluent conduit is operative for the supply of liquid to one or more sprinklers (not shown), which may be located in one or more of the following places of the vehicle: the windshield front of the vehicle, rear windscreen of the vehicle, side windows of the vehicle in general and especially in places that provide visual access to the exterior mirrors of the vehicle, headlights, rear lights of the vehicle and exterior mirrors of the vehicle. The main mount 902 preferably includes a crankcase 906 which generally defines a volume 908 that accommodates the cylindrical liquid heating chamber, where the heating chamber 904 of the liquid is located, in a larger portion where a heating assembly is disposed. liquid 910. The crankcase 906 also preferably defines a liquid inlet channel 912, a liquid outlet channel 914 and an opening for receiving a liquid temperature sensor 916, all in communication with the volume 908 accommodating the heating chamber of the liquid. The liquid heating assembly 910 preferably comprises a circular cylindrical outer sleeve 920, which defines a liquid heating chamber 904, and a base 922, which defines a washer 924 arranged to retain an insulating liquid sealing ring 926. A plurality of heating elements, three in the illustrated embodiment, designated by the reference numerals 930, 931 and 932, is located within the sleeve 252. It is appreciated that although the embodiment illustrated includes three heating elements, any suitable configuration of the elements may be provided. heating elements. Outer sleeve 920 includes multiple openings, designated 960 and 962, to allow liquid to flow therethrough. It is appreciated that the openings 960 and 962 may be provided in any suitable amount, location and manner to facilitate the passage of the liquid through the outer sleeve 920 into the heating assembly of the liquid 910. The heating assembly of the liquid 910 may also include a connection for the electric power supply 965 electrically connected to the base 922. As seen further in Figs. 10A and 10B, the hot liquid discharge system 900 also includes a liquid connector assembly 966 that includes an inlet path portion of the liquid 968 and an outlet path portion of the liquid '970. The liquid connector assembly 966 preferably comprises an injection molded element that also defines a differential pressure bypass path portion 972, which is controlled by a one-way spring loaded valve 974 and which allows the flow to flow from the liquid inlet path portion 968 to the liquid outlet path portion 970 when the differential pressure through it reaches a predetermined threshold, "typically 0.3-0.5 bar, which indicates the existence of a blockage in the path of the liquid to - through the liquid heating chamber 904. A valve 976 is provided in the inlet path portion of the liquid 968 upstream of the liquid heating chamber 904. The valve 176 preferably includes a partial sealing element, such as a 177 ball, which allows the supply of liquid under pressure to volume 108 that accommodates The reservoir liquid of the vehicle is supplied to the volume 908 that houses the liquid heating chamber by means of the inlet path portion of the liquid 968 and the liquid inlet channel 912 and preferably enters the liquid heating chamber 904, defined by the sleeve 920, via the openings 960 and 962 formed in the sleeve 920. The liquid is heated in the liquid heating chamber. 904 and the temperature of the liquid or of the air which is superimposed on the liquid, depending on the liquid level, is detected by means of the temperature sensor 916, preferably a sensor commercially available from EPCOS AG. Corporate Communications of Munich, Germany, identified by Catalog No. G560 / 50K / F2. The temperature sensor 916 is preferably mounted on a printed circuit board 978 which is mounted inside the crankcase 906 and is located outside the volume 908 accommodating the liquid heating chamber. - Control circuit for operation of the main assembly 902 which is connected inter alia to the temperature sensor 916 and the vehicle battery.It is seen that the valve 976 is similar in structure to the valve 176 of Fig. 1, including a ball 980, except valve 976 that communicates with a conduit 982 that provides an alternate flow path between the sprinklers and the reservoir.The liquid discharge system 900 thus provides two passages of fluid flow to drain the fluid from the sprinklers to the reservoir with the conclusion of the spraying As seen in Fig. 10A, one end 986 of the conduit 982 extends beyond a surface outside the crankcase 906. bi-directional valve 1000 is connected to the inlet path portion of liquid 968 and conduit 982. The bi-directional valve assembly 1000 includes a bi-directional valve 1002 and conduits 1004 and 1006 and respective coupling 1014 and 1016 that connects valve 1002 with the inlet path portion of liquid 968 and end 968 of conduit 982 respectively. The bi-directional valve 1002 comprises respectively a bi-directional disposable valve member 1000 further includes an inlet conduit 1020 for connecting the hot liquid discharge system 900 to the vehicle reserve (not shown). In the operation orientation in Fig. 10A, the valve member 1018 of the bi-directional valve 1002 is placed in the "ON" position allowing flow into the liquid heating chamber 904 by shunting the ball 980 of valve 976, indicated by the flow, designated by arrows 1030, 1032 and 1034, in addition to flow through the 980 ball of the valve 976 which is indicated by the flows, designated by the arrows 1040 and 1042. In the operation orientation of Fig. 10A, the hot liquid discharge system 900 supplies liquid under pressure to the liquid heating chamber. 904 and allows backflow, as indicated by the arrows 1030, 1032 and 1034, with a relatively fast speed. In the operation orientation in Fig. 10B, the valve member 1018 of the bi-directional valve 1002 is located in the "OFF" position allowing flow into the heating chamber of the liquid 904 through the ball 980 of valve 976, which is indicated by arrows 1040 and 1042. In the operation orientation of FIG. 10B, the. Valve 976 is functionally equivalent to valve 176 of Fig. 1 and allows counterflow, as indicated by arrows 1040 and 1042, with a relatively slow speed. -The hot liquid discharge system 900 thus provides backflow functionality available without requiring the 976 valve or having access directly after installation in a vehicle. It is appreciated that the bi-directional valve assembly 1000 can be bypassed and a cap (not shown) placed on the end 986 of the conduit 982. In this orientation the hot liquid discharge system 900 allows the supply of liquid under pressure to the chamber. of heating of the liquid 904 but prevents backflow through this, restricting backflow at a relatively slow speed. It is appreciated that the systems of the present invention are suitable for inclusion both in new vehicles for adaptation in existing vehicles. It will be appreciated by persons skilled in the art that the present invention is not limited to those that have been particularly shown and described above. In addition, the scope of the present invention includes both combinations and sub-combinations of the different characteristics described above as well as the modifications and variations of these that would occur by a person skilled in the art with reading the above specification and which do not. they are in the prior art. It is noted that in relation to this date, the best method known to the applicant to carry out the aforementioned invention, is that which is clear from the present description of the invention.

Claims (28)

1. CLAIMS Having described the invention as above, the content of the following claims is claimed as property. 1. Sprinkler mount of hot windshield fluid characterized in that it comprises: a liquid heating assembly; and a hot liquid spray assembly operable to spray hot liquid onto a windshield, wherein the liquid heating assembly comprises: a liquid heating chamber; at least one heating element arranged in the liquid heating chamber; and at least one heat sink in contact for heat conduction with at least one heating element, at least one heat sink that defines at least partially at least one flow channel of the liquid and that is operable to transfer heat from at least one heating element to the liquid flowing through at least one flow channel of the liquid.
2. 2. Spray assembly of hot windshield fluid according to claim 1, characterized in that it also comprises a temperature sensor of the operating liquid for detecting a temperature of the liquid heated by the liquid heating assembly and wherein at least one heat sink and is operative to improve the homogeneity of the heating of the liquid in the liquid heating chamber, by means of which the temperature detected by the liquid temperature sensor is generally representative of the temperature of the liquid inside the heating chamber of the liquid.
3. 3. Installation of spraying hot windshield fluid according to claim 1 or claim 2, characterized in that at least one heating dissipator is configured so that it is not uniform along at least one dimension of the heating chamber of the windshield. liquid. - "Windshield hot spraying assembly" according to claim 1 or claim 2, characterized in that a heat sink is configured to extend along a longitudinal axis, which is designed to be vertically aligned and 5.
4. Not being uniform along the longitudinal axis, by means of this, improving the homogeneity of the heating of the liquid along it
5. 5. Mounting of hot windscreen liquid spraying according to any of the preceding claims, characterized in that at least A heat sink includes at least one communication opening with at least one flow channel of the liquid.
6. 6. Spray assembly of hot windshield fluid according to any of the preceding claims, characterized in that at least one heat sink is placed inside the liquid heating chamber to define at least one fluid flow orifice.
7. 7. Windshield hot fluid spray assembly according to claim 6, characterized in that at least one fluid flow orifice causes the fluid to flow into the liquid-heating chamber in multiple directions.
8. 8. Installation of hot windscreen fluid spraying according to claim 6 or claim 7, characterized in that at least one heat sink is configured to extend along a longitudinal axis and where the fluid flows in multiple directions includes the flow of the fluid in the opposite longitudinal directions along the longitudinal axis.
9. 9. Windshield hot spray spraying assembly according to any of claims 6-8, characterized in that the flow of the fluid in multiple directions provides improved homogeneity of the liquid temperatures in the liquid heating chamber.
10. 10. Sprinkler mount of hot windscreen fluid characterized in that it comprises: a liquid heating assembly; and a hot liquid spray assembly operable to spray hot liquid onto a windshield, wherein the liquid heating assembly comprises: a liquid heating chamber; at least one heating element arranged in the liquid heating chamber; and a connection for the supply of electric power to at least one heating element, the connection for the electric power supply includes a conductive portion that can be fused in contact for the conduction of the heat with the liquid heating chamber and is melting operant, and thus interrupting the supply of electrical power to at least one heating element in response to heating of the liquid in the liquid heating chamber above a predetermined temperature.
11. 11. Spray assembly of hot windshield fluid according to claim 10, characterized in that it comprises at least one heat sink in contact for heat conduction with at least one heating element, at least one of the heat sinks. at least partially defines a liquid flow channel and is operable from the heat transfer from at least one heating element so that the liquid flows through at least one flow channel of the liquid.
12. 12. Sprinkler assembly of hot windshield fluid according to claim 11, characterized in that it also comprises a temperature sensor of the operating liquid for detecting a temperature of the liquid heated by the liquid heating assembly and wherein at least one heat sink and is operative to improve the homogeneity of the heating of the liquid in the liquid heating chamber, by means of which the temperature detected by the liquid temperature sensor is generally representative of the temperature of the liquid inside the chamber of the liquid. heating of the liquid.
13. 13. Spray assembly of hot windscreen fluid in accordance with claim 11 or claim 12, characterized in that at least one heating dissipator is configured so that it is not uniform along at least one dimension of the liquid heating chamber.
14. 14. Spray assembly of hot windscreen fluid in accordance with claim 11 or claim 12, characterized in that a heat sink is configured to extend along a longitudinal axis, which is designed to be vertically aligned and not uniform along the longitudinal axis, thereby improving the homogeneity of the heating of the liquid along this.
15. 15. Windshield hot spraying assembly according to any of claims 11-14, characterized in that at least one heat sink includes at least one opening communicating with at least one flow channel of the liquid.
16. 16. Spray assembly of hot windshield fluid characterized in that it comprises: a liquid heating assembly; and a hot liquid spray assembly operable to spray hot liquid onto a windshield, wherein the liquid heating assembly comprises: a liquid heating chamber; at least one heating element arranged in the liquid heating chamber; and a mounting for the liquid supply coupled to the liquid heating chamber and includes: a valve operable to allow liquid to flow into the liquid heating chamber and to prevent backflow from the liquid heating chamber; and at least one bypass line, which the user selects operatively to allow -the counterflow to bypass the valve.
17. 17. Spray assembly of hot windshield fluid, characterized in that it comprises: a liquid heating assembly; an operating liquid temperature sensor for detecting a hot liquid temperature by means of the liquid heating assembly; a spraying assembly of hot operating liquid for spraying hot liquid onto a windshield; and an operant controller for controlling the operation of the spray assembly according to the temperature sensed by the liquid temperature sensor, the controller providing at least a first spray case which starts when the liquid temperature is at a first temperature and ends when the temperature of the liquid is at a second temperature, below the first temperature, and at least a second case of spraying which ends when the temperature of the liquid is at a third temperature, below the second temperature.
18. 18. Installation of spraying hot windshield fluid according to claim 17, characterized in that a temperature sensor is operable to detect an ambient temperature outside the heating assembly of the liquid and where the third temperature is determined by the controller on the basis of at room temperature.
19. 19. Windshield hot spraying assembly according to claim 17 or claim 18, characterized in that the controller is operable to terminate at least the first spray case if the second temperature is not reached within a predetermined time.
20. 20. Windshield hot fluid spray assembly according to any of claims 17-19, characterized in that the controller is operative to terminate at least the second spray case if the third temperature is not reached within a predetermined time. .
21. 21. Spray assembly of hot windshield fluid according to any of claims 17-20, characterized in that at least the second case starts when the temperature of the liquid is at the first temperature.
22. 22. Windshield hot spraying assembly according to any of claims 17-21, characterized in that the liquid heating assembly also includes a connection for the supply of electric power to at least one heating element, the connection for the electric power supply includes a conductive portion that can be melted in contact for the conduction of the heat with the chamber of heating of the liquid and is operative of the fusion, and thus interrupt the supply of electric power to at least a heating element in response to heating of the liquid in the liquid heating chamber above the predetermined temperature.
23. 23. Spray assembly of hot windshield fluid according to any of claims 17-22, characterized in that it comprises at least one heat sink in contact for the conduction of heat with at least one heating element, at least one of The heat sinks at least partially define a liquid flow channel and is operable from the heat transfer from at least one heating element so that the liquid flows through at least one flow channel of the liquid.
24. 24. Spray assembly of hot windscreen fluid according to claim 23, characterized in that it also comprises a temperature sensor of the operating liquid for detecting a temperature of the hot liquid by the liquid heating assembly and wherein at least one heat sink and is operative to improve the homogeneity of the heating of the liquid in the liquid heating chamber, by means of which the temperature detected by the liquid temperature sensor is generally representative of the temperature of the liquid inside the heating chamber of the liquid.
25. 25. Spray assembly of hot windshield fluid according to claim 23 or claim 24, characterized in that at least one heating dissipator is configured so that it is not uniform along at least one dimension of the liquid heating chamber.
26. 26. Spray assembly of hot windshield fluid according to claim 23"or claim 24, characterized in that a heat sink is configured to extend along a longitudinal axis, which is designed so that it is vertically aligned and not It is uniform along the longitudinal axis, by means of this, improving the homogeneity of the heating of the liquid along this 27. Assembly of hot windscreen liquid spray according to any of claims 23-26, characterized in that less a heat sink includes at least one opening that communicates with at least one liquid flow channel 28. Method for spraying hot liquid on a windshield, characterized in that it comprises: providing a liquid heating assembly including a chamber of liquid heating, at least one heating element arranged in the liquid heating chamber and at least s a contact heat sink for conducting heat with at least one heating element, at least one of the heat sinks defines at least partially at least one flow channel of the liquid; heating at least one heating element; transferring heat from at least one heating element to the liquid flowing through at least one flow channel of the liquid; and spraying the heated liquid the heating assembly of the liquid onto a windshield. 2 . Method for spraying hot liquid onto a windshield, characterized in that it comprises: providing a liquid heating assembly. which includes liquid temperature sensor; heating a liquid in the liquid heating assembly until a start temperature of the first spraying cycle is detected by means of the liquid temperature sensor; initiating at least the first spray case when the start temperature of the first spray cycle is detected by the liquid temperature sensor; finish the first spray case when the final temperature of the first spray cycle is detected by the liquid temperature sensor; the final temperature of the first spray cycle is below the start temperature of the first spray cycle; subsequently initiating at least one second spray event when the start temperature of the second spray cycle is detected by the liquid temperature sensor; finishing the second spray case when the final temperature of the second spray cycle is detected by the liquid temperature sensor, the final temperature of the second spray cycle is below the end temperature of the first spray cycle.