DE2346412A1 - Gas or oil fired high pressure steam cleaner boiler - has a second, supplemental heat exchanger fitted parallel to the main unit - Google Patents

Abstract

The boiler is designed to provide pressurised water and/or steam containing appropriate solvents or detergents for cleaning cars, machinery or buildings using jet nozzles etc. The boiler vessel contains a main heat exchanger in line with the burner. A second heat exchanger is fixed parallel to the first unit by means of one or more flue ducts. One side of the second heat exchanger is removable and fitted with an outlet flue. The interior contains a removable unit consisting of gas ducting panels and partitions. The design provides effective heat extraction in a compact layout.

Description

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Guido Oberdorfer, 7919 Bellenberg, Werkstrasse 22

High-pressure cleaning device heated with a gas or oil burner

The invention is a with a gas or Oil burner heated high-pressure cleaning device with a arranged in a detergent container, located in First heat exchanger extending in the direction of the burner, which is followed by a further heat exchanger.

Such a device is known from German utility model 6 941 533. It is used to clean Motor vehicles, machines, house facades and the like.

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used. The cleaning is carried out by spraying a suitable detergent, usually hot water with additives corresponding to the respective requirements , at considerable pressure and high temperature onto the objects to be cleaned.

The energy requirements of such devices must be kept as small as possible for reasons of cost. Hence the German sees Utility model 6 941 533 following one arranged in the detergent container in the direction of the burner axis Heat exchanger in front of a vertical channel by additionally arranging after-heating surfaces. These The task of reheating surfaces is to use as much of the thermal energy in the exhaust gases as possible for heating purposes to make the detergent usable.

However, the known device has the disadvantage that the heat exchangers take up a lot of space, whereby the space available in the detergent container is poorly used, so that the entire device is very bulky and therefore expensive.

In contrast, the invention aims at a high-pressure cleaning device with a space-saving arrangement of the heat exchangers with the best possible use of the heating energy used as well as low maintenance and care costs.

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This is achieved in that the further heat exchanger is arranged parallel to the first heat exchanger extending in the direction of the burner and is firmly connected to it via at least one channel. This measure enables a very compact arrangement of the heat exchangers without restricting the heat exchange surfaces. Because deflecting walls for the exhaust gases are provided in the further heat exchanger, their thermal energy is largely used for heating up the detergent. The further heat exchanger according to the invention preferably has the shape of a rectangular box which is closed with an easily removable cover and to which an outlet for the exhaust gases is attached .

This makes it possible to easily clean combustion residues from the heat exchanger and thus to maintain its best efficiency. According to the invention, the maintenance effort is reduced even further if the baffles in the further heat exchanger are connected to one another by spacers, baffles and spacers forming an insert which is inserted into the interior of the further heat exchanger. And this insert has a handle on its top. The slide-in unit can easily be removed from the box-shaped heat exchanger for maintenance purposes.

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be taken, so that both the cleaning of the insert of combustion residues, as well as the cleaning of the Inner walls of the second heat exchanger can be carried out very easily and quickly.

An exemplary embodiment of the high-pressure cleaning device according to the invention is described with the aid of the drawing. Further features of the invention emerge from the description and the drawing.

Show it:

Fig. 1 shows the detergent container of a high-pressure cleaning device with heat exchangers arranged therein in the Top view;

Fig. 2 shows the section of the detergent container along the line A-A in Fig. 1;

FIG. 3 shows the view of the further heat exchanger in the direction of arrow B in FIG. 2 with the illustration of the Side wall removed inside the heat exchanger;

4 shows a perspective illustration of an insert and

5 shows, on an enlarged scale, the connection between the first heat exchanger of the detergent container wall and the burner.

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The detergent container 1 is delimited by the walls 2 and 3 and has the bottom 4. The walls 2 and the bottom 4 at the same time form the outer boundary walls of the high-pressure cleaning device with the exception of wall 3. At this adjoins a chamber 5, in the not shown units of the high-pressure cleaning device, such as a High pressure pump, control and regulating devices and the like. Are housed. On a wall 2 of the detergent container 1 is screwed together with the burner 6 only shown on the flange side of the 1st heat exchanger 7, the one has a rectangular cross-section. With the 1st heat exchanger 7, the second heat exchanger 8 is firmly connected via pipe sockets 9 and Io, the pipe socket Io being a blind socket is executed and only serves to firmly connect the two heat exchangers to one another. The other one Heat exchanger 8 is closed at its top by a cover 11, on which a discharge nozzle 12 for the exhaust is attached. The cover 8 is screwed to screw bolts 14 with nuts 13, which are connected to the side walls of the heat exchanger 8 are welded. In the interior of the heat exchanger 8, which is rectangular Has cross-section, an insert 15 is inserted, which consists of the deflection walls 16 and 17, which extend horizontally and the spacers 18, 19 which extend vertically. The upper deflection wall 16 is provided with a handle 2o. Heat exchangers 7 and 8 are supported

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via feet 21 on the bottom 4 of the detergent container 1.

The supply of fresh water to the detergent container l takes place through the supply line 22 via a valve 23 controlled by a float, not shown, which the Maintains the liquid level in the detergent container 1 at a level at which the heat exchanger 7.8 of detergents are washed around.

Due to the parallel, horizontal arrangement of the 1st heat exchanger 7 and the downstream further heat exchanger 8 becomes the space of the detergent container 1 optimally used and created a large heat-exchanging surface. The burner flame strikes in the direction the arrows 22 in the heat exchanger 7, is on the rear wall of this heat exchanger in the direction of the arrow 23 is deflected and enters the further heat exchanger 8 through the pipe socket 9, as the arrow 24 indicates. The baffles 16 and 17 direct the burner exhaust gases, as in FIG Fig. 3 is shown with the arrows 25 and 26, in a detour to the exhaust connection 12. The burner flame or its exhaust gases are thus forced to a very long way through the heat exchanger, so that they almost over the walls Give up their entire thermal energy to the detergent in the detergent container 1. As especially in the cooler area of the exhaust gases, i.e. combustion residues are deposited in the further heat exchanger 8, this heat

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Exchanger exposed to contamination, which the heat transfer to the detergent in the detergent container impaired and thus worsened the efficiency. The insert described is used to remedy this defect 15, which can be easily removed from the heat exchanger and cleaned by lifting off the cover 11 can be. Since the heat exchanger only has smooth walls inside after removing the insert also very easy to clean. The heat exchanger 7 is provided on the rather end face with a flange 27, in which Bores threaded bolts 28 are welded. With the interposition of a seal 29, the flange 27 is of the heat exchanger 7 screwed to a wall 2 of the detergent container 1 by nut 3o. The thread length the threaded bolt 28 is made so long that it penetrates the bores of an intermediate flange 31 and thus this intermediate flange can be braced on the threaded bolt 28 with the aid of the nuts 32. At the intermediate flange 31, the flange 33 of the burner 6 is fastened with the aid of screws 34.

This arrangement is also used for easy maintenance of the Device. By loosening the nuts 32, the burner can be easily serviced together with the intermediate flange be removed from the wall 2 of the detergent container 1 without the tight connection between the

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Flange 27 of the heat exchanger 7 and the wall 2 releases. For maintenance of the burner must therefore the detergent in Container 1 cannot be drained. In addition, by detaching the burner, the inside of the heat exchanger 7 accessible.

The invention is not restricted to the exemplary embodiment described; it can e.g. depending on the requirement the Flame and exhaust gas routing can also be carried out differently, e.g. in such a way that the pipe socket 9 is designed as a blind socket is and the flame or the exhaust gases enter through the pipe socket in the further heat exchanger 8, its inner Deflection walls are then arranged appropriately.

Claims

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Claims (7)

- Q _ Claims IJ High-pressure cleaning device heated with a gas or oil burner with one arranged in a detergent container and extending in the direction of the burner first heat exchanger, which is followed by a further heat exchanger, characterized in that that the further heat exchanger (8) parallel to the first heat exchanger extending in the direction of the burner (7) and is firmly connected to this via at least one channel (9, lo). 2. High-pressure cleaning device according to claim 1, characterized in that in the further heat exchanger (8) Omlenkwand (16,17) are provided for the burner exhaust gases. 3. High pressure cleaning device according to claims 1 and 2, characterized in that the further heat exchanger (8) has the shape of a rectangular Has box, which is closed with an easily removable cover (11) on which a trigger nozzle {12) for the Exhaust is attached. 509813/0154 - Io - ic - 4. High pressure cleaning device according to claims 1-3, characterized in that the Deflection walls (16, 17) in the further heat exchanger (8) are connected to one another by spacers (18, 19) are, wherein baffles and spacers form an insert (15) which is in the interior of the further heat exchanger is used. 5. High pressure cleaning device according to claim 4, characterized characterized in that the insert (15) has a handle (2o) on its upper side. 6. High pressure cleaning device according to claims 1-5, characterized in that the first heat exchanger (7) has a flange (27) with threaded bolts (28) welded into it, by means of which he holds by nuts (3o) with the interposition of a seal (29) on the inside of the wall (2) of the washing center oil container (1) is screwed, the threaded bolts (28) at the same time by means of further nuts (32) carry an intermediate flange (31) on the outside of the wall (2), with which the flange (33) of the burner (6) is screwed is. 7. High pressure cleaning device according to claims 1-6, characterized in that the further heat exchanger (8) with the first (7) 509813/0154 - left - two pipe sockets (9, lo) is connected, one of which is designed as a blind socket (lo). 509813/0154