EP0849546A1 - High safety and reduced maintenance water heater - Google Patents
High safety and reduced maintenance water heater Download PDFInfo
- Publication number
- EP0849546A1 EP0849546A1 EP96830640A EP96830640A EP0849546A1 EP 0849546 A1 EP0849546 A1 EP 0849546A1 EP 96830640 A EP96830640 A EP 96830640A EP 96830640 A EP96830640 A EP 96830640A EP 0849546 A1 EP0849546 A1 EP 0849546A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- water
- water heater
- microwave source
- heater according
- duct
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
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Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/18—Water-storage heaters
- F24H1/185—Water-storage heaters using electric energy supply
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/12—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium
- F24H1/14—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
- F24H1/142—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form using electric energy supply
Definitions
- the present invention relates to a high safety and reduced maintenance water heater.
- Electric water heating devices or boilers which conventionally comprise a suitably thermally insulated outer casing, in which is arranged a water holding tank, holding a set amount of water to he heated.
- this water tank is arranged an electric resistance by means of which the water in the tank is heated to a desired temperature.
- the electric water heaters are preferably used in small environments since they provide a good operation safety; however they has the drawback that the heating electric resistance is quickly covered by limestone formations greatly reducing the heating efficiency thereof.
- gas water heaters are also frequently used which have a comparatively low operation cost but which require a very accurate installation operation in order to meet very stringent safety rules.
- the aim of the present invention is to overcome the above mentioned drawbacks, by providing a water heater which is very safe in operation and which, moreover, requires a very reduced maintenance.
- a main object of the present invention is to provide such a water heater which can operate without any problems even in small environments.
- Another object of the present invention is to provide such a water heater which has a high water heating efficiency, which is held substantially constant in the time.
- Yet another object of the present invention is to provide such a water heater which has very reduced operation costs.
- a high safety and reduced maintenance water heater comprising holding means for holding water to be heated and water heating means for heating said water, characterized in that said water heating means comprise a microwave source.
- the water heater according to the present invention which has been generally indicated by the reference number 1, comprises holding means for holding herein a set amount of water, which holding means comprise, in the embodiment shown in these figures, a holding tank 2, into which, through an inlet duct 3, is supplied water to be heated, the heated water being delivered through a hot water delivery duct 4.
- the subject water heater comprises, according to the invention, water heating means constituted by a microwave source or generator 5.
- the microwave source is coupled to the bottom of the tank 2 through a sector 6 made of a ceramic material or any other suitable materials.
- the microwave source 5 can comprise an electrically powered microwave source (preferably with a supply source of 4,400 volts) which can be power-supplied by the electric mains, by providing, on the bottom of the water heater, an electric transformer 7 electrically coupled to said microwave source 5.
- an electrically powered microwave source preferably with a supply source of 4,400 volts
- an electric transformer 7 electrically coupled to said microwave source 5.
- the tank 2 is housed inside a casing 8 and the gap between the outer surface of the water tank 2 and the inner surface of the casing 8 is filled by a suitable thermally insulating material 9.
- the water heater is moreover provided with a thermostat switch 10 adapted to detect the temperature of the water held in the tank 2 and adapted to switch on or off said microwave source 5, in order to hold the water at a desired temperature.
- the subject water heater comprises, moreover, means for conveying a cooling air flow on the microwave source 5.
- this conveying means comprise a duct 12 extending about the microwave source 5 and communicating with the outer environment through an inlet 13 defined at a bottom region of the side surface of the casing 8 and through a pipe 14 extending inside the gap provided between the casing 8 and the water tank 2 and leading to a top region of the water heater.
- the inlet 13 is suitably protected by a grid 15, a further grid 16 protecting the outlet of the pipe or duct 14.
- a fan 17 which is driven together with the microwave source 5 so as to provide the necessary cooling air flow inside the duct 12, in order to prevent the microwave source 5 from overheating.
- the subject water heater can moreover comprise a thermometer 18 for displaying the temperature of the water inside the water tank 2.
- the water tank 2 can be replaced by a coil duct 20 therethrough is caused to pass the water to be heated.
- the water coil 20 is housed in a chamber 21 defined in a casing 22 and the microwave source 23 is coupled to the bottom wall 24 of the chamber 21 through the interposition of a sector 25 made of a ceramic material or any other suitable materials.
- the water heater according to the invention In operation, the water heater according to the invention, the used heating power and the heated water mass being the same, will provide a very reduction of the heating time required for heating the water.
- the subject water heater will provide a very high heating efficiency which will be held constant in the time.
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Pump Type And Storage Water Heaters (AREA)
Abstract
The present invention relates to a high
safety and reduced maintenance water heater or
boiler, comprising holding means for holding therein
water to be heated and heating means for heating the
water.
In the subject water heater, the water
heating means comprise a microwave source.
Description
The present invention relates to a high
safety and reduced maintenance water heater.
Electric water heating devices or boilers
are already known, which conventionally comprise a
suitably thermally insulated outer casing, in which
is arranged a water holding tank, holding a set
amount of water to he heated.
In this water tank is arranged an electric
resistance by means of which the water in the tank is
heated to a desired temperature.
The electric water heaters are preferably
used in small environments since they provide a good
operation safety; however they has the drawback that
the heating electric resistance is quickly covered by
limestone formations greatly reducing the heating
efficiency thereof.
Because of this limestone formation, the
electric water heaters require frequent maintenance
operations in order to clean or replace the heating
electric resistance, to recover the efficiency of the
water heating operation.
Moreover, since the electric water heaters
use a comparatively expensive power source, the
operation costs thereof are comparatively high.
As an alternative to the electric water
heaters, gas water heaters are also frequently used
which have a comparatively low operation cost but
which require a very accurate installation operation
in order to meet very stringent safety rules.
Actually, as a gas water heater is
installed, it is necessary to provide the environment
in which the gas water heater is installed with a
suitable aeration in order to prevent an air
reduction inside the environment as cause by the gas
combustion, as well as in order to prevent dangerous
combustion emissions from being held in the
environment.
On the other hand, also in these types of
water heaters and, more specifically, in the so-called
instantaneous type of heater, great limestone
deposits are formed, which require inevitably
extensive maintenance operations in order to provide
the boiler with a good water heating efficiency.
Accordingly, the aim of the present
invention is to overcome the above mentioned
drawbacks, by providing a water heater which is very
safe in operation and which, moreover, requires a
very reduced maintenance.
Within the scope of the above mentioned
aim, a main object of the present invention is to
provide such a water heater which can operate without
any problems even in small environments.
Another object of the present invention is
to provide such a water heater which has a high water
heating efficiency, which is held substantially
constant in the time.
Yet another object of the present invention
is to provide such a water heater which has very
reduced operation costs.
According to one aspect of the present
invention, the above mentioned aim and objects, as
well as yet other objects, which will become more
apparent hereinafter, are achieved by a high safety
and reduced maintenance water heater, comprising
holding means for holding water to be heated and
water heating means for heating said water,
characterized in that said water heating means
comprise a microwave source.
Further characteristics and advantages of
the water heater according to the present invention
will become more apparent hereinafter from the
following detailed disclosure of two preferred,
though not exclusive, embodiments of said water
heater, being illustrated, by way of an indicative,
but not limitative example, in the accompanying
drawings, where:
With reference to the number references of
figure 1 to 4, the water heater according to the
present invention, which has been generally indicated
by the reference number 1, comprises holding means
for holding herein a set amount of water, which
holding means comprise, in the embodiment shown in
these figures, a holding tank 2, into which, through
an inlet duct 3, is supplied water to be heated, the
heated water being delivered through a hot water
delivery duct 4.
As shown, the subject water heater
comprises, according to the invention, water heating
means constituted by a microwave source or generator
5.
More specifically, the microwave source is
coupled to the bottom of the tank 2 through a sector
6 made of a ceramic material or any other suitable
materials.
In particular, the microwave source 5 can
comprise an electrically powered microwave source
(preferably with a supply source of 4,400 volts)
which can be power-supplied by the electric mains, by
providing, on the bottom of the water heater, an
electric transformer 7 electrically coupled to said
microwave source 5.
As shown, the tank 2 is housed inside a
casing 8 and the gap between the outer surface of the
water tank 2 and the inner surface of the casing 8 is
filled by a suitable thermally insulating material 9.
The water heater is moreover provided with
a thermostat switch 10 adapted to detect the
temperature of the water held in the tank 2 and
adapted to switch on or off said microwave source 5,
in order to hold the water at a desired temperature.
On the power supply circuit of the
microwave source 6 is moreover provided an anti-noise
filter 11.
The subject water heater comprises,
moreover, means for conveying a cooling air flow on
the microwave source 5.
More specifically, this conveying means
comprise a duct 12 extending about the microwave
source 5 and communicating with the outer environment
through an inlet 13 defined at a bottom region of the
side surface of the casing 8 and through a pipe 14
extending inside the gap provided between the casing
8 and the water tank 2 and leading to a top region of
the water heater.
The inlet 13 is suitably protected by a
grid 15, a further grid 16 protecting the outlet of
the pipe or duct 14.
Near the inlet 13 is provided a fan 17
which is driven together with the microwave source 5
so as to provide the necessary cooling air flow
inside the duct 12, in order to prevent the microwave
source 5 from overheating.
It should be apparent that the hot air at
the output of the duct 12, by flowing through the
pipe 14, will cooperate with the microwave source 5
in heating the water held in the water tank 2.
The subject water heater can moreover
comprise a thermometer 18 for displaying the
temperature of the water inside the water tank 2.
According to a modified embodiment shown in
figure 5, in which the water heater according to the
present invention has been generally indicated by the
reference number 1a, the water tank 2 can be replaced
by a coil duct 20 therethrough is caused to pass the
water to be heated.
In this embodiment, the water coil 20 is
housed in a chamber 21 defined in a casing 22 and the
microwave source 23 is coupled to the bottom wall 24
of the chamber 21 through the interposition of a
sector 25 made of a ceramic material or any other
suitable materials.
Also in this embodiment, is provided a duct
26, air-supplied by means of a fan 27, likewise to
the first preferred embodiment, in order to provide a
suitable cooling for the microwave source.
In operation, the water heater according to
the invention, the used heating power and the heated
water mass being the same, will provide a very
reduction of the heating time required for heating
the water.
Thus, it will be possible to have available
a comparatively high amount of heated water in a
comparatively short time.
In this connection it should be moreover
pointed out that since the subject water heater does
not use any combustion heat source, it can be
installed, without any safety problems, even inside
small environments.
Moreover, the subject water heater will
provide a very high heating efficiency which will be
held constant in the time.
From the above disclosure and from an
observation of the figures of the accompanying
drawings the great functionality and facility of use
characterizing the subject water heater will be self
evident.
In particular, it is to be pointed out that
a water heater has been provided which is very safe
in operation and which, moreover, does not require
any maintenance operation, thereby providing a high
efficiency for all the life thereof.
While the water heater has been disclosed
and illustrated with reference to preferred
embodiments thereof, it should be apparent that the
disclosed embodiments are susceptible to many
modifications and variations all of which will come
within the scope of the appended claims.
Claims (9)
- A high safety and reduced maintenance water heater, comprising holding means for holding water to be heated and water heating means for heating said water, characterized in that said water heating means comprise a microwave source.
- A water heater according to Claim 1, characterized in that said water holding means comprise a water tank.
- A water heater according to Claims 1 and 2, characterized in that said water heater comprises a casing encompassing said water tank, between said casing and water tank being formed a gap filled by a thermally insulating material.
- A water heater according to one or more of the preceding claims, characterized in that said microwave source is mounted on the bottom of said water tank through an interposition of a sector made of a ceramic material or any other suitable materials.
- A water heater according to one or more of the preceding claims, characterized in that said water heater comprises moreover air conveying means for conveying a cooling air flow on said microwave source.
- A water heater according to one or more of the preceding claims, characterized in that said cooling air conveying means comprise a duct extending about said microwave source and coupled to a pipe extending through a gap and leading to a top region of said casing, at an inlet of said duct being provided a fan for generating said cooling air flow conveyed along said duct and said pipe.
- A water heater according to one or more of the preceding claims, characterized in that said water holding means comprise a coil duct supplied by water to be heated and arranged in a chamber defined in a casing, said heating means comprising a microwave source coupled to a wall of said chamber through an interposition of a sector made of a ceramic material or any other suitable material.
- A water heater according to one or more of the preceding claims, characterized in that said microwave source is provided with an anti-noise filter.
- A water heater according to one or more of the preceding claims, characterized in that it comprises moreover a thermostatic sensor for sensing the temperature of water being heated, said sensor being coupled to a power supply circuit of said microwave source.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96830640A EP0849546A1 (en) | 1996-12-20 | 1996-12-20 | High safety and reduced maintenance water heater |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP96830640A EP0849546A1 (en) | 1996-12-20 | 1996-12-20 | High safety and reduced maintenance water heater |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0849546A1 true EP0849546A1 (en) | 1998-06-24 |
Family
ID=8226085
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96830640A Withdrawn EP0849546A1 (en) | 1996-12-20 | 1996-12-20 | High safety and reduced maintenance water heater |
Country Status (1)
Country | Link |
---|---|
EP (1) | EP0849546A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19911948A1 (en) * | 1999-02-22 | 2000-09-28 | Schellbach Winfried | Microwave treatment of aqueous liquid for bacteria content reduction and crystallization seed formation, by water molecule cluster disruption to form stable seeds and atomic oxygen generation to oxidize bacteria |
CN102434958A (en) * | 2010-12-08 | 2012-05-02 | 苏州嘉言能源设备有限公司 | Hybrid microwave water heater |
CN106839401A (en) * | 2017-03-30 | 2017-06-13 | 广东美的厨房电器制造有限公司 | Microwave water-heater |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4029927A (en) * | 1975-11-28 | 1977-06-14 | Mcmillan Hugh G | Microwave water heater |
DE2852399A1 (en) * | 1977-12-07 | 1979-07-12 | Bosch Siemens Hausgeraete | Inbuilt baking oven - has microwave chamber at top with fan drawing in cooling air above and below |
WO1987005093A1 (en) * | 1986-02-20 | 1987-08-27 | Applied Agricultural Research Limited | Microwave water heater |
WO1993000781A1 (en) * | 1991-06-21 | 1993-01-07 | Ipctisa S.R.L. | A microwave heating method and a relative microwave heating device |
-
1996
- 1996-12-20 EP EP96830640A patent/EP0849546A1/en not_active Withdrawn
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4029927A (en) * | 1975-11-28 | 1977-06-14 | Mcmillan Hugh G | Microwave water heater |
DE2852399A1 (en) * | 1977-12-07 | 1979-07-12 | Bosch Siemens Hausgeraete | Inbuilt baking oven - has microwave chamber at top with fan drawing in cooling air above and below |
WO1987005093A1 (en) * | 1986-02-20 | 1987-08-27 | Applied Agricultural Research Limited | Microwave water heater |
WO1993000781A1 (en) * | 1991-06-21 | 1993-01-07 | Ipctisa S.R.L. | A microwave heating method and a relative microwave heating device |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19911948A1 (en) * | 1999-02-22 | 2000-09-28 | Schellbach Winfried | Microwave treatment of aqueous liquid for bacteria content reduction and crystallization seed formation, by water molecule cluster disruption to form stable seeds and atomic oxygen generation to oxidize bacteria |
CN102434958A (en) * | 2010-12-08 | 2012-05-02 | 苏州嘉言能源设备有限公司 | Hybrid microwave water heater |
CN106839401A (en) * | 2017-03-30 | 2017-06-13 | 广东美的厨房电器制造有限公司 | Microwave water-heater |
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18D | Application deemed to be withdrawn |
Effective date: 19981229 |