EP1146970A1 - Hochdruckreinigungsgerät - Google Patents
HochdruckreinigungsgerätInfo
- Publication number
- EP1146970A1 EP1146970A1 EP99968347A EP99968347A EP1146970A1 EP 1146970 A1 EP1146970 A1 EP 1146970A1 EP 99968347 A EP99968347 A EP 99968347A EP 99968347 A EP99968347 A EP 99968347A EP 1146970 A1 EP1146970 A1 EP 1146970A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- liquid
- temperature
- cleaning device
- burner
- pressure cleaning
- 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.)
- Granted
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B08—CLEANING
- B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
- B08B3/00—Cleaning by methods involving the use or presence of liquid or steam
- B08B3/02—Cleaning by the force of jets or sprays
- B08B3/026—Cleaning by making use of hand-held spray guns; Fluid preparations therefor
Definitions
- the invention relates to a high-pressure cleaning device according to the preamble of claim 1.
- a generic high-pressure cleaning device is described, for example, in the operating instructions for the device HDS 995 from Alfred Kärcher GmbH & Co.
- the desired liquid temperature is set via two separate control devices.
- the one control device is used to adjust the amount of liquid delivered
- the other control device is used to adjust the threshold value of the control circuit of the burner.
- the control circuit of the burner is set so that the burner switches off when the desired liquid temperature is reached, which is measured via a temperature sensor at the outlet of the heating coil, and switches on again when the desired liquid temperature is undershot.
- the burner Since the heat output is not adjustable when using a burner in the continuous-flow heater, the burner must be designed so that it can heat the liquid to a working temperature of 80 ° C. with the maximum amount of liquid conveyed (for example 1000 l / h).
- the threshold value for switching off the burner to the desired temperature is to be increased at the device provided for the temperature setting and the amount of liquid conveyed is reduced at the corresponding control device for the delivery rate.
- the delivery rate In order to achieve optimal, as uninterrupted operation of the burner as possible, the delivery rate must be set so that the heat generated by the burner constantly heats the liquid to the desired temperature. With this optimal setting, the burner operates without interruption and therefore burns under optimal temperature conditions.
- this optimum setting value for the delivery rate is often not reached, for example because the person operating the high-pressure cleaning device is not aware of the relationship or because there is no time to optimally set the delivery rate.
- the burner switches on and off frequently, so that it becomes slightly sooty and requires frequent maintenance. If there is set too high against the flow rate, the burner runs continuously without actually reaching the temperature set on the thermostat. The operator can therefore not be sure whether the working temperature set on the temperature selection switch actually corresponds to the temperature of the cleaning liquid.
- DE 87 16 070 U describes a combined liquid and oil pump.
- the combination of a quantity-controlled overflow valve in the liquid line is coupled with an overflow valve in the fuel delivery line that is controlled as a function of the high-pressure liquid delivered.
- the regulation of the burner output for the amount of fuel delivered is, however, very complex to implement, since the amount of combustion air has to be changed depending on the amount of fuel delivered. However, this has the consequence that the burner must be designed in a range of different operating states. However, this alone is associated with very complex series of measurements, since the burner must comply with the legally prescribed exhaust gas values in every operating state.
- the object of the present invention is to develop a generic high-pressure cleaning device in such a way that economical heating of the liquid in one possible, as simple as possible for the operator large temperature range is reached, while ensuring that the high-pressure cleaning device is as simple as possible.
- a high-pressure cleaning device initially has a control device for setting the delivery rate of the liquid under high pressure, a continuous-flow heater for optionally heating the liquid and a temperature control for the liquid temperature, and a temperature sensor for measuring the liquid temperature of the conveyed liquid shortly before it emerges in a discharge device.
- Both the setting values of the flow rate control and those of the temperature control of the liquid can be entered together and simultaneously via a single setting element. This eliminates the problem for the person operating the device that different setting elements have to be set separately to achieve a desired liquid temperature, as was still necessary in the prior art.
- the control of the instantaneous water heater is addressed on the one hand and, at the same time, the amount of water is continuously reduced by means of the amount of water control, so that the temperature can be increased proportionally to the reduction in the amount of water in accordance with the amount of heat supplied in the instantaneous heater.
- the setting member preferably has different setting ranges.
- the liquid under high pressure can be heated to a desired temperature while maintaining the maximum flow rate.
- This value is entered via the setting element and the threshold value of the burner control for switching off the burner is raised accordingly. This type of control can take place until a predetermined liquid temperature is reached.
- This liquid temperature can be advantageous approx. 80 ° C.
- the threshold value of the burner control for switching off the burner is further increased in a second setting range, while at the same time the quantity of liquid delivered is continuously reduced to a predetermined limit value.
- This limit value for reducing the amount of liquid is advantageously about half of the largest possible delivery rate. A further lowering would lead to an insufficient delivery rate of the liquid escaping under high pressure.
- the setting member additionally has an on or off for switching the high pressure pump for the liquid on and off.
- a setting member according to the invention very particularly advantageously consists of a rotary switch.
- the operator can switch on the high-pressure cleaning device with one hand, i.e. First switch on the high-pressure pump to deliver the liquid under high pressure, and set the desired liquid temperature (one-hand operation).
- Fig. 1 a schematic representation of a high-pressure cleaning device according to the invention
- FIG. 2 an exemplary representation of an adjusting element of the high-pressure cleaning device according to FIG. 1.
- a high pressure cleaning device 10 is shown schematically.
- the cleaning liquid is conveyed in the direction of arrow a under low pressure into a line system 12, via which the cleaning liquid is fed to an axial piston pump 14 serving as a high-pressure pump.
- the axial piston pump 14 is a Drive motor 16 driven. Downstream of the axial piston pump is an overflow valve 18 which serves to regulate the amount of liquid.
- the line system opens into a heat exchanger 20 in which an oil burner 22 for heating the cleaning liquid is integrated.
- a temperature sensor 24 for measuring the liquid temperature is arranged at the end of the heat exchanger.
- the cleaning liquid heated to the desired temperature is then fed to a discharge device 26 in the direction of arrow b.
- a rotary switch 30 which serves as an adjusting element for the high-pressure cleaning device 10.
- the rotary switch 30 is a combination switch. On the one hand, it serves to switch the high-pressure cleaning device on and off, i.e. for switching the drive motor 16 of the high-pressure pump 14 on and off (cf. FIG. 1) and secondly for setting the desired temperature of the high-pressure cleaning liquid.
- the display of the hand switch 30, which can be rotated in the direction of arrow c or in the opposite direction, is denoted by 0.
- the number I indicates the position for the switched-on motor 16. In position II, the burner 22 (see FIG. 1) is switched on and in the temperature range up to 80 ° C.
- the frequency of the switching on and off of the burner is varied via the temperature control in order to reach the desired temperature with a constant high amount of liquid. If the rotary switch 30 is turned beyond the limit value of 80 ° C. into a higher temperature range, the temperature control for the liquid and the flow rate control for the amount of liquid delivered are addressed simultaneously. Depending on the operating level, i.e. depending on whether the oil burner 22 is switched on or off, the amount of water during cold water operation is reduced and / or the temperature is increased continuously.
Landscapes
- Cleaning By Liquid Or Steam (AREA)
- Feeding And Controlling Fuel (AREA)
- Mechanical Sealing (AREA)
- Cleaning In General (AREA)
- Centrifugal Separators (AREA)
Description
Claims
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19904789A DE19904789A1 (de) | 1999-02-05 | 1999-02-05 | Hochdruckreinigungsgerät |
DE19904789 | 1999-02-05 | ||
PCT/EP1999/010023 WO2000045967A1 (de) | 1999-02-05 | 1999-12-16 | Hochdruckreinigungsgerät |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1146970A1 true EP1146970A1 (de) | 2001-10-24 |
EP1146970B1 EP1146970B1 (de) | 2005-09-28 |
Family
ID=7896596
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP99968347A Expired - Lifetime EP1146970B1 (de) | 1999-02-05 | 1999-12-16 | Hochdruckreinigungsgerät |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1146970B1 (de) |
AT (1) | ATE305338T1 (de) |
DE (2) | DE19904789A1 (de) |
DK (1) | DK1146970T3 (de) |
WO (1) | WO2000045967A1 (de) |
Families Citing this family (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102007034910B4 (de) * | 2007-07-24 | 2015-02-19 | Dynajet GmbH | Hochdruckreinigungsgerät |
ITUB20154286A1 (it) * | 2015-10-09 | 2017-04-09 | Ip Cleaning S R L | Idropulitrice ad acqua calda con controllo della temperatura |
CN111468458A (zh) * | 2020-04-26 | 2020-07-31 | 盐城博尔福机电科技发展有限公司 | 一种高压清洗机的智能控制方法 |
IT202000016768A1 (it) | 2020-07-09 | 2022-01-09 | Ip Cleaning S R L | Idropulitrice ad acqua calda con controllo della temperatura |
Family Cites Families (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1197296B (it) * | 1986-09-26 | 1988-11-30 | Gorla Appalti Spa Soc | Apparecchiatura mobile per la pulizia e il lavaggio di superfici con getto di acqua calda a pressione |
DE3823320A1 (de) * | 1988-07-09 | 1990-01-11 | Suttner Gmbh & Co Kg | Hochdruckreinigungseinrichtung |
IT1267260B1 (it) * | 1994-06-24 | 1997-01-28 | Vetrella Spa | Apparecchio di pulizia multifunzionale |
-
1999
- 1999-02-05 DE DE19904789A patent/DE19904789A1/de not_active Ceased
- 1999-12-16 DE DE59912608T patent/DE59912608D1/de not_active Expired - Lifetime
- 1999-12-16 EP EP99968347A patent/EP1146970B1/de not_active Expired - Lifetime
- 1999-12-16 AT AT99968347T patent/ATE305338T1/de not_active IP Right Cessation
- 1999-12-16 WO PCT/EP1999/010023 patent/WO2000045967A1/de active IP Right Grant
- 1999-12-16 DK DK99968347T patent/DK1146970T3/da active
Non-Patent Citations (1)
Title |
---|
See references of WO0045967A1 * |
Also Published As
Publication number | Publication date |
---|---|
DK1146970T3 (da) | 2005-11-14 |
WO2000045967A1 (de) | 2000-08-10 |
EP1146970B1 (de) | 2005-09-28 |
DE19904789A1 (de) | 2000-08-17 |
DE59912608D1 (de) | 2005-11-03 |
ATE305338T1 (de) | 2005-10-15 |
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