FR2558575A3 - APPARATUS FOR AUTOMATIC WATER HEATING - Google Patents

Abstract

THE INVENTION RELATES TO AN APPARATUS FOR AUTOMATIC HEATING OF WATER. IN THIS APPLIANCE, IN WHICH THE ELECTRICAL SUPPLY OF A HEATING ELEMENT 3 IS CONTROLLED BY A SWITCH 4 INCLUDING A THERMOSENSITIVE SYSTEM 9, 10 SENSITIVE TO THE TEMPERATURE OF THE VAPOR EXHAUSTED FROM THE INSIDE OF CONTAINER 3 BY MEANS OF A DUCT , THIS DUCT IS MADE IN THE FORM OF A DESCENDING PASSAGE 21 LOCATED IN HANDLE 3 OF THE APPLIANCE. APPLICATION ESPECIALLY TO ELECTRIC KETTLES WITH AUTOMATIC OPERATION.

Description

The present invention relates to apparatus

  for automatic water heating, such as brul-

  Automatically operated jugs and kettles of the type in which, in use, water in a container is heated by means of

  electrically immersed in water, the power supply

  until this element is controlled by a switch

  thermosensitive material disposed outside the container and

  below the water level and is temperature sensitive.

  of the steam conveyed by a duct extending

  then the space inside the container above the water level to the switch. In the following we will

  refer to such devices for water heating, in

  signing under the term devices of the type described.

  In appliances for heating water from

  described type, the thermosensitive switch is often

  formed in a unit which is fixed to the wall of the container in the vicinity of the support used for the electric element, and the unit also includes the connection terminals of the electric element. In an appliance for heating

  water of this type, the pipe is made under the

  of a pipe that has an opening

  above the level of the water and which extends downwards

  the container to the level of the support provided for the electrical element, where it passes through the wall of the container so as to direct the steam towards the switch

  thermosensitive. This arrangement is very complex and the

  located inside the container of the water heater is an inconvenient element

  effective cleaning of the container.

  This problem is solved in accordance with the invention by virtue of the fact that an apparatus for the automatic heating of water of the type described is provided, characterized in that the duct is made in the form of a descending passage

  located inside a handle of the heating appliance

  ge, or defined at least partially by this handle.

  The passage can be housed entirely inside

  of the handle. Otherwise the passage can be defined by a

  darkness inside the handle and by a

  adjacent outer face of a wall of the container.

  The invention is particularly applicable to apparatus for the automatic heating of water, for example for automatic kettles of the type known as kettles in the form of jugs, which comprise a handle

  attached to a substantially vertical side wall of the con-

  content, above a heat-sensitive switch. Linen-

  can also be applied to

  water heater of the type having a handle extending

  above the top of the container and along the

  side of the container up to the switch.

  Preferably the unit, which includes the switch

  thermally sensitive, also contains the connection terminals

of the electric element.

  Suitably, the passage for steam, which is located inside the handle or is defined by

  the latter has an intake for steam in

  the interior of the container and a way out

  at the level of the unit that contains the thermoswitch

sible.

  Admission is preferably located in the vicinity of

  an opening in the side wall of the container.

  and that allows the passage of steam from inside the container in the passage intended for steam. Otherwise this opening can be provided in a superior surface

  container or in a cover provided for the container.

  The output is advantageously constituted and

  in order to direct the steam on an element, activated

  by the steam, the thermosensitive switch.

  Preferably at least one longitudinal rib can be provided in the passage of the steam so as to

  subdivide the flow of steam within the passenger compartment

in addition to a flow path.

  Other features and advantages of the pre-

  invention will emerge from the description given below.

  Referring now to the accompanying drawings, in which: Figure 1 is a sectional view of a kettle according to the present invention; Figure 2 is a sectional view of the handle of the kettle shown in Figure 1; Figure 3 is a view in the direction A shown in Figure 2; and Figure 4 is a sectional view taken along the line IV-IV in Figure 2; and FIG. 5 is a sectional view taken following

the line V-V in FIG.

  The kettle shown in FIG. 1 is of the type often referred to as a jug or jug kettle and comprises a substantially cylindrical container 1, a lid 2, an electrical element 3 located

  inside the container 1, a switch 4 and a handle

5.

  As shown in FIG. 1, the electrical element is essentially fixed to the cylindrical wall

  6 of the container 1 by means of a mounting plate 7, and the

  switch 4 is attached to the outer surface of the wall 6

  in the vicinity of the mounting plate 7.

  The switch 4 comprises a box 8 which

  holds the connection terminals of the electric element 3,

  a thermosensitive switch which is of the usual and com-

  carries a steam-actuated element 9, for example a bimetallic or bimetallic strip, a movable actuator urged by a neutral-position spring-loaded device (not shown), and a manually-contactable member 11 attached to the valve; maneuvering organ

  10. The actuating member 10 is movable between a posi-

  "On" and "off" position by manual actuation of the manually operable member 11, and is arranged to be brought to its "off" position when the steam directed on the actuated element 9 over there

  steam heats this element 9 sufficiently to operate it.

  In addition, the operating member 10 can be brought into the "off" position when the heating element is energized.

  and is not covered by water inside the kettle.

  For example, by means of a pusher which can be contacted by a thermally expandable member in contact with a portion of the mounting plate in the vicinity of the heating element. The switch need not be described in more detail apart from the fact that an opening 12

  is provided in the upper part 13 of the box 8,

  just below the 9 element activated by the steam.

  The handle 5 of the kettle is fixed on the outer surface of the wall 6 of the container above the switch 4, by means of respective upper and lower screws 14 and 15. Each screw 14,15 extends through

  a respective opening in the wall 6 and is

  in a respective threaded hole 16, 17, formed in the superstructure

  face 20 of the handle 5, which faces the wall 6 of the container.

neur 1.

  In the surface 20 of the handle is provided an elongate recess 21 which extends downward from a level just below the hole 16 provided for the upper screw 14 to a level just above the hole The elongate recess 21 has two vertical sides 22 and an inner surface 23 which, in association with the outer surface

  adjacent to the wall 6 of the container 1, define a step

  wise descending for the steam, when the handle 5 is

attached to the container 1.

  The upper part of the passage planned for the

  steam is adjacent to an opening 24 which is

  in the wall 6 of the container 1 below the opening

  16 is provided for the upper screw 14 and serves as an inlet for the vapor coming from the inside of the container 1. A part 25 of the wall 6 situated above the opening 24 is bent inwards so as to direct steam

  outward through opening 24.

  As shown in Figures 3 and 5, it is

  provided on each side of the hole 17 provided for the lower screw

  15, an outlet channel 26 inclined towards the rear and re-

  binding the lower portion of the steam passageway to a central outlet opening 27 formed in the lower face 28 of the handle 5. When the handle 5

  is fixed to the container 1, the outlet opening 27 is dis-

  placed directly above the opening 12 located at the

  upper part 13 of the boot 8 of the switch. At the

  of the outlet opening 27 and on the underside

  28 of the handle is provided a projecting portion 29 ser-

  to direct the steam from the outlet channels 26 into the opening 12 in the switch housing 8 and the steam actuated element 9 of the switch

thermosensitive.

  As shown in Figures 2, 3

  and 4 is provided on the inside surface 23 of the recess-

  21, two longitudinal ribs 30 which subdivide the downward flow of the vapor located in the passage

in three lanes of traffic.

  In use, the container 1 of the kettle shown in Figure 1 is filled with a quantity of water at least sufficient to cover the element

  3. This element 3 is connected by means of the

  the organ 11 which can be contacted manually, which causes the actuating member 10 to come into contact with the

  position "on". The water in the container 1 is heated

  3 and when the water begins to boil, steam is produced in the space above the water level inside the container 1.

  part of the steam produced is directed by the part

  25 of the container wall 6 towards the outside through the opening 24, and in the passage for the steam, defined by the recess 21 formed in the handle 5 and the adjacent outer surface of the

  6. The vapor descends into the passage by being subdivided

  in three flow paths defined by the ribs 30

  and by the sides 22 of the recess 21. From the

  lower portion of the steam passage, the latter through the outlet channels 26 and the outlet opening 27 located in the handle and the opening 12 located

  in the housing 8 of the switch and is directed on the

  9, actuated by steam, of the thermoswitch

  sible. This element 9 is actuated by the temperature of the steam and displaces the operating member 10 by bringing it into

  its "off" position, which automatically disconnects the

  energy supply of the electric element 3.

  The operating member 10 can then be moved

  born in its initial position "walks" by means of

  the organ 11 can be contacted manually.

  The unit formed by the thermosensitive switch

  is preferably constituted and arranged in such a way as to

  put in the water to escape from itself when the steam

condenses.

  The ribs 30 located in the recess 21 provide an obstruction to the downward flow of the

  steam, which leads to the establishment of pressure on the

  interior of the steam passage, and this contributes to

  that a substantial stream of steam is directed at the 6-

  element 9 operated by steam. This makes it possible to prevent an early action of the element 9, which otherwise could provoke

  a penetration of water vapor into the passage of the va-

  fear and descend directly into the passageway until

  thermosensitive switch, before the water located in the

container 1 end.

  In the embodiment shown in the drawings, no sealing means is provided between the surface 20 of the handle 5 surrounding the recess 21 and the outer surface of the wall 6 of the container. Such sealing means may be provided, but this

  is not considered essential since the

  The constitution and arrangement of the two ribs 30 are such as to ensure that a sufficient amount of vapor is lowered into the central flow path between the ribs 30.

  to enter the thermosensitive switch in order to

  operate the steam actuated element.

  Note that we can bring many

  modifications to the embodiment of the invention

  felt on the drawings. For example, it is possible to modify

  the inlet arrangement leading into and out of the steam passage, and the number and shape of the ribs 30 in the steam passage can be modified to obtain a

  different vapor flow in the passage.

  In another embodiment (not shown

  The passage for the steam may be fully housed inside the handle instead of being defined by a recess in the handle and the container wall.

Claims (6)

  1. Apparatus for automatic water heating   of the type in which, in use, water   killed in a container (1) is heated by an electrical element   tramp (3) immersed in water, the power supply applied to said element being controlled by a thermosensitive switch (4) disposed outside the container and   below the water level and is temperature sensitive.   erosion of the vapor conveyed by a duct extending from the space inside the container above the water level to the switch, characterized in that the duct is made in the form of a downcomer (21) located within a handle (5) of the heater, or at least partially defined by this handle.   2. Apparatus for automatic water heating according to claim 1, characterized in that the passage   is housed entirely inside the handle (5).   Apparatus for automatic water heating according to claim 1, characterized in that the passage is defined by a recess (21) in the handle (5) and an adjacent outer surface of a wall (6). container (1).   4. Apparatus for automatic water heating   according to any one of claims 1 to 3, characterized   in that the handle (5) is fixed to a substantially vertical side wall (6) of the container, above a heat-sensitive switch (4), and that the passage (21)   has an exit (27) opening at the level of the inter-   thermosensitive switch (4), which is arranged and arranged to direct the steam on an element (9) actuated by   the steam, the thermosensitive switch (4).   5. Apparatus for automatic water heating   according to any one of claims 1 to 4, characterized   in that the passage (21) has an inlet for the steam coming from inside the container (1), which is   adjacent an opening (24) in a side wall   (6) of the container (1), and that part (25) of the wall   lateral section (6), located above the opening (24), is   inward so as to direct the steam towards   outside, from the inside of the container, through towards the opening (24).   6. Apparatus for automatic water heating   according to any one of claims 1 to 5, characterized   in that at least one longitudinal rib (30) is provided in the passage (21) so as to subdivide the flow   steam in this passage in addition to a traffic lane.