Stoves and furnaces – Liquid heater – Open-top vessel that may include lid
Reexamination Certificate
1998-11-24
2002-04-23
Clarke, Sara (Department: 3743)
Stoves and furnaces
Liquid heater
Open-top vessel that may include lid
C126S390100, C099S403000, C165S185000
Reexamination Certificate
active
06374821
ABSTRACT:
FIELD OF THE INVENTION
The present invention relates to a liquid heating apparatus of, for example, a food frying machine, noodle boiling equipment, etc., and in particular a liquid heating apparatus which is able to efficiently heat liquid in a liquid tank.
BACKGROUND AND SUMMARY OF THE INVENTION
Conventionally, a food frying machine acting as a liquid heating apparatus for frying foods with edible oil stored in an oil reservoir is disclosed by, for example, Japanese Laid-open Utility Model No. 64837 of 1986. The food frying machine
51
is, as shown in
FIG. 11
(PRIOR ART), such that a reservoir portion
54
which accumulates sediment remaining in an oil tank
52
is formed so as to protrude downward from one end side of the bottom
53
of the oil tank
52
, a concave heat leading passage
56
which leads heat from a burner
55
is formed so as protrude upward along the lengthwise direction of the rear side of the bottom
53
of the oil tank
52
, and a fin
57
having a cross-shaped section is fixed in the heat leading passage
56
.
Another conventional example is disclosed by, for example, Japanese Laid-open Utility Model No. 45046 of 1986. The food frying machine
151
is, as shown in
FIG. 12
(PRIOR ART), composed of a burner
154
disposed downward of a roughing flat bottom
153
a
of an oil tank
153
accommodated and disposed in the casing
152
, and a combustion chamber
156
which heats oil
155
in the oil tank
153
by the burner
154
, wherein a reservoir portion
157
which accumulates sediment in the oil tank
153
is formed so as to protrude downward in the direction from the bottom portion
153
a
of the oil tank
153
toward the combustion chamber
156
, a heat insulating member
158
is provided at the surrounding of the reservoir portion
157
, and a fin
159
, which protrudes toward the combustion chamber
157
, is provided at the bottom portion
153
a.
However, in the food frying machine
51
, since a fin
57
can not be fixed close to the bottom portion
53
, there is a problem in that sufficient heat efficiency can not be obtained. That is, since the food frying machine
51
has such a structure that the fin
57
is formed by uniting two long plate members so that the cross section thereof is cross-shaped, and the fin
57
is disposed in a concave heat leading passage
56
on the bottom portion
53
, it is difficult for the fin
57
to be directly fixed inside the heat leading passage
56
.
Furthermore, even though the fin
57
is fixed directly inside the heat leading passage
56
, the contact area between the fin and the interior of the heat leading passage
56
is only equivalent to the plate thickness of the two plate members, and in a case where the fin
57
is directly fixed, there is a possibility that the fin
57
is warped in the lengthwise direction due to heat expansion to cause the bottom portion
53
of the oil tank
52
to be deformed. Therefore, the fin
57
must be fixed with appointed space remaining between the outer circumferential end of the fin
57
and the interior of the heat leading passage
56
, wherein the heat transmission area made effective by the fin
57
can not be made large, and it becomes difficult to obtain sufficient heat efficiency.
Furthermore, since the fin
57
itself is complicated and is cross-shaped in its cross section, the production cost thereof is increased, and since it is necessary to form a concave heat leading passage
56
at the bottom portion
53
of the oil tank
52
, the production cost of the oil tank
52
is also increased, and therefore causes a problem in that the structure of the food frying machine
51
itself is complicated and the production cost thereof is accordingly increased.
Furthermore, since the fin
57
having a cross-shaped section is disposed in the heat leading passage
56
in a fixed state, it becomes difficult to eliminate soot or the like which is adhered to the deep side (upward side) of the heat leading passage
56
of the fin
57
, wherein cleaning work of the burner portion
55
is made cumbersome, and since the bottom portion
53
of the oil tank
52
is made roughly horizontal, the sediment is deposited on the bottom portion
53
, and become cumbersome to eliminate the sediment. That is, there is a problem in that the maintenance of a food frying machine
51
itself is not easily carried out.
Furthermore, in a food frying machine
151
according to another conventional example, since a combustion gas passage
160
communicating with the combustion chamber
156
is merely installed downward of the bottom portion
153
a
of the oil tank
153
and rearward of the rear portion
153
b
, it is difficult to cool down the outside plate member
160
a
of the combustion gas passage
160
, wherein the outside plate of the casing
152
is apt to be highly heated. In particular, the rear surface plate
152
a
of the casing
152
is disposed roughly close to the outside plate member
160
a
of the combustion gas passage
160
formed outside the rear portion
153
b
of the oil tank
153
. Therefore, the temperature of the outside plate member
160
a
is directly transmitted to the rear surface plate
152
a
, wherein the temperature thereof is apt to be highly increased.
As a result, in a case where such a food frying machine
151
is installed for use at a cooking place, there is a fear that the temperature of the left and right side plates and upper surface plate, which are connected to the rear side plate
152
a
of the casing
152
is raised to such a degree that a user can not touch the machine with his hand, and in particular since the temperature of the rear side plate
152
a
of the casing
152
is apt to be raised, vacant space of an appointed interval is required rearward of the casing
152
, whereby such a problem arises, by which the installation space was developed in view of the abovementioned shortcomings and problems, and it is therefore an object of the invention to provide a liquid heating apparatus which is cheap in its production cost with a simplified structure, by which easy maintenance can be secured, wherein fins are fixed directly to the bottom portion of the liquid tank to secure sufficient heat efficiency.
Another object of the invention is to provide a liquid heating apparatus in which a temperature rise of the outside plate of the casing is efficiently suppressed by effectively cooling the plate members which form a combustion gas passage, and the installation space efficiency can be improved.
In order to achieve the abovementioned objects, one aspect of the invention is characterized in that, in a liquid heating apparatus which raises the temperature of liquid in a liquid tank by heating the bottom of the liquid tank with a burner disposed downward of the bottom of the liquid tank, an inclination plane is inclined at an appointed predetermined degree of angle and is formed on the bottom of the liquid tank, long fins are fixed on the rear side of the inclination plane along the inclination direction thereof, and the fins are provided with thermal expansion absorbing means, which are able to absorb thermal expansion, along the lengthwise direction thereof.
With such a construction, the temperature of liquid is raised in line with the inclination plane of the bottom portion of the liquid tank being heated by combustion of a burner while the combustion gas of the burner is caused to flow through the fins fixed at the rear side of the heating surface along the inclination plane. Since the fins are fixed by a thermal expansion absorbing means in a state where the fins are closely adhered to the rear side of the inclination plane, at least the fixed portion thereof becomes a heat transmission portion to increase the transmission area, whereby heat efficient fins are provided so as to protrude from the rear side of the inclination plane. Therefore, the shape of the fins is simplified to make maintenance easy.
Furthermore, the fins can be formed to be roughly channel-like in their cross section, and the bottom wall portion can be adhered to and fixed at the rear
Clarke Sara
Eiken Industries Co. Ltd.
Harness & Dickey & Pierce P.L.C.
LandOfFree
Liquid heating apparatus does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Liquid heating apparatus, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Liquid heating apparatus will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2892338