CA2192265A1 - Household appliance with electronic program control - Google Patents
Household appliance with electronic program controlInfo
- Publication number
- CA2192265A1 CA2192265A1 CA002192265A CA2192265A CA2192265A1 CA 2192265 A1 CA2192265 A1 CA 2192265A1 CA 002192265 A CA002192265 A CA 002192265A CA 2192265 A CA2192265 A CA 2192265A CA 2192265 A1 CA2192265 A1 CA 2192265A1
- Authority
- CA
- Canada
- Prior art keywords
- fact
- electronic program
- accordance
- program control
- safety device
- 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.)
- Abandoned
Links
Classifications
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/421—Safety arrangements for preventing water damage
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/0018—Controlling processes, i.e. processes to control the operation of the machine characterised by the purpose or target of the control
- A47L15/0049—Detection or prevention of malfunction, including accident prevention
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L15/00—Washing or rinsing machines for crockery or tableware
- A47L15/42—Details
- A47L15/46—Devices for the automatic control of the different phases of cleaning ; Controlling devices
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F34/00—Details of control systems for washing machines, washer-dryers or laundry dryers
- D06F34/08—Control circuits or arrangements thereof
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
- G05B19/042—Programme control other than numerical control, i.e. in sequence controllers or logic controllers using digital processors
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2401/00—Automatic detection in controlling methods of washing or rinsing machines for crockery or tableware, e.g. information provided by sensors entered into controlling devices
- A47L2401/30—Variation of electrical, magnetical or optical quantities
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/01—Water supply, e.g. opening or closure of the water inlet valve
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/26—Indication or alarm to the controlling device or to the user
-
- A—HUMAN NECESSITIES
- A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
- A47L—DOMESTIC WASHING OR CLEANING; SUCTION CLEANERS IN GENERAL
- A47L2501/00—Output in controlling method of washing or rinsing machines for crockery or tableware, i.e. quantities or components controlled, or actions performed by the controlling device executing the controlling method
- A47L2501/32—Stopping or disabling machine operation, including disconnecting the machine from a network, e.g. from an electrical power supply
-
- D—TEXTILES; PAPER
- D06—TREATMENT OF TEXTILES OR THE LIKE; LAUNDERING; FLEXIBLE MATERIALS NOT OTHERWISE PROVIDED FOR
- D06F—LAUNDERING, DRYING, IRONING, PRESSING OR FOLDING TEXTILE ARTICLES
- D06F37/00—Details specific to washing machines covered by groups D06F21/00 - D06F25/00
- D06F37/42—Safety arrangements, e.g. for stopping rotation of the receptacle upon opening of the casing door
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/21—Pc I-O input output
- G05B2219/21152—If output defect, switch it off
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B2219/00—Program-control systems
- G05B2219/20—Pc systems
- G05B2219/26—Pc applications
- G05B2219/2633—Washing, laundry
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Automation & Control Theory (AREA)
- Washing And Drying Of Tableware (AREA)
Abstract
A household appliance, in particular a washing machine or a dishwasher, is operated by an electronic program control (6). An electric load (5) in the appliance is switched on and/or off via a semiconductor component or a relay. If this semiconductor component or the relay fails, e.g. by short circuit or by contact sticking, a safety device is activated after the recognition of the failure of the component. The safety device disconnects the load (5) from its voltage supply. In a preferred design, an intentional water overflow takes place after the failure of the component, which results in the actuation of the water safety device. Thereupon the water safety device switches off the electronic program control (6) and thus also the load (5).
Description
` 2192265 -3The invention concerns a safety device for a household 4 appliance with an electronic program control.
In a household appliance, in particular a dishwasher 6 or washing machine with electronic program control, a load, 7 such as a circulating pump or a heater, is located in the 8 machine. Generally, the load is switched on and off via a 9 semiconductor component, for example a thyristor or triac, or via an electromagnetic relay.
11 This semiconductor element or this relay is subject to 12 a reliability typical of such components and thus fails 13 with a component-specific probability. Common failure 14 situations include complete interruption or a permanent short circuit of the switched circuit. In this case, the 16 short circuit is a failure which causes secondary damage in 17 many cases. For example, a short circuit in the circuit of 18 a circulating pump causes a continuous triggering of this 19 circulating pump irrespective of the tank level status.
The consequence is damage at least to the circulating pump, 21 since this often is not designed for operating without 22 liquid. Very frequently a circulating pump operating 23 without liquid causes leaks in the sealing system.
24 Moreover, damage from overheating of the circulating pump operating continuously can occur in such a case of failure.
26 If such a failure occurs, at least an expensive repair 27 of the household appliance can be expected, since most 28 safety arrangements do not react to the failure of the 29 semiconductor element or relay. In most safety arrangements, only the appearance of secondary damage 31 causels corrective action.
219226~
-
In a household appliance, in particular a dishwasher 6 or washing machine with electronic program control, a load, 7 such as a circulating pump or a heater, is located in the 8 machine. Generally, the load is switched on and off via a 9 semiconductor component, for example a thyristor or triac, or via an electromagnetic relay.
11 This semiconductor element or this relay is subject to 12 a reliability typical of such components and thus fails 13 with a component-specific probability. Common failure 14 situations include complete interruption or a permanent short circuit of the switched circuit. In this case, the 16 short circuit is a failure which causes secondary damage in 17 many cases. For example, a short circuit in the circuit of 18 a circulating pump causes a continuous triggering of this 19 circulating pump irrespective of the tank level status.
The consequence is damage at least to the circulating pump, 21 since this often is not designed for operating without 22 liquid. Very frequently a circulating pump operating 23 without liquid causes leaks in the sealing system.
24 Moreover, damage from overheating of the circulating pump operating continuously can occur in such a case of failure.
26 If such a failure occurs, at least an expensive repair 27 of the household appliance can be expected, since most 28 safety arrangements do not react to the failure of the 29 semiconductor element or relay. In most safety arrangements, only the appearance of secondary damage 31 causels corrective action.
219226~
-
2 The invention provides a household appliance with
3 electronic program control for preventing secondary damage
4 in the case of the failure of a switch, such as a semiconductor component or relay, that switches a load on 6 and/or off.
7 The household appliance, in particular a dishwasher or 8 a washing machine, has an electronic program control. An 9 electric load located in the appliance is switched on and/or off via a switch. Failure of the switch is 11 recognized by the electronic program control. A safety 12 device is activated after recognition of the failure of the -13 switch which disconnects the load from its voltage source.
14 Thus, secondary damage is avoided in the case of such a switch failure.
16 In a household appliance in accordance with the 17 invention, the electronic program control is provided for 18 controlling the rinse and/or wash program. The electrical 19 load located in the machine, such as a circulating pump, is switched on and/or off by the switch, which is a 21 semiconductor or a relay associated with this electronic 22 program control.
23 The electronic program control is designed so that it 24 recognizes a failure of the semiconductor element or relay.
In the case of a critical failure of such a component, such 26 as a short circuit, a safety device disconnects the load in 27 the shorted circuit from its voltage source.
28 This safety device includes a switch element operated 29 by the electronic program control to switch off the shorted circuit. In order to avoid a high component expenditure in 31 the case of several circuits to be protected, it is 32 advantageous to provide only one safety eleme~t-, which is 33 triggered by the program control in the case of recognition 34 of t~e failure of any semiconductor component or relay, to switch off the entire voltage supply of the device.
36 Preferably, the household appliance has a water safety '' i 219226P5 1 device having a safety element that disconnects the load in 2 the shorted circuit from a voltage supply in the case of 3 leaks or overflowing of a tank containing material to be 4 rinsed and/or washed. The safety element also disconnects a supply valve allowing liquid to flow into the tank, and 6 the electronic program control. The water safety device 7 also may be used for avoiding secondary faults in the case 8 of failure of a semiconductor element. For this, the 9 supply valve is shifted into an uninterrupted switched-on status by the electronic program control, so that water 11 runs into the device continuously. When the critical level 12 is reached, the tank overflows. The safety element of the 13 water safety device recognizes this tank overflow and 14 switches off the supply valve, the electronic program control, the shorted circuit, and preferably all loads in 16 the device.
17 In this way a secondary fault can be prevented with an 18 existing water safety device without additional component 19 expense in the case of failure of a semiconductor element or relay.
22 The invention is explained in greater detail below by 23 means of a specific embodiment as shown in the drawing.
24 The Figure shows a schematic wiring diagram of an electronic control according to the invention~ -27 The drawing shows a circuit plan of a dishwasher 28 having an electronic program control 6, which is connected 29 with a voltage source via a main switch 1. Switches, such as semiconductor elements or relays, for controlling a 31 moto~ 2 of a discharge pump, a supply valve 4, and at least 32 one further load 5, such as a circulating pump, are located 33 in the electronic program control 6.
~ 21~2265 1 In addition, the dishwasher is equipped with a water 2 safety device. This water safety device includes a float 3 switch 3 provided in a leakage water collecting device in 4 the bottom of the dishwasher. In the case of leakage in the dishwasher or overflowing of a tank 8 containing 6 material to be rinsed and rinse liquid, the float switch 3 7 is triggered by the liquid collecting in the bottom of the 8 collecting device. A switch device 7 of the float switch 3 9 is designed as a double-pole, double-throw switch, which, in a connected state, disconnects the motor 2 of the 11 discharge pump from the electronic program control 6 and 12 connects it directly to the voltage supply of the device.
13 By releasing the float switch 3 the circuits of all loads 14 2, 4, and 5, controlled by the electronic program control 6, are interrupted simultaneously.
16 The electronic program control 6 is capable of l? recognizing if a load 5 is activated in an undesirable way, 18 which indicates a failure of the controlling semiconductor 19 element. If such a fault appears, the electronic program control 6 reacts after recognizing the failure in such a 21 way that its control program executes a fault handling 22 routine. In this routine, a continuous water supply is 23 triggered by uninterrupted triggering of the supply valve 24 4. When a maximum tank level is reached, the further supplied water is conducted via an overflow conduit to the 26 leakage water collecting device, now shown, in the bottom 27 of the dishwasher. This leakage water which collects 28 triggers the float valve 3, which completes the intentional 29 separation of all loads 2, 4 and thus also the load 5 located in the fault circuit, from the power supply. The 31 motor 2 is then reconnected to the power supply in a 32 different circuit. This prevents a secondary fault in the 33 device from appearing because of an undesirably activated 34 load 5.
IThe embodiments described are exemplary. The 36 invention includes modifications within the scope of the 37 claims.
7 The household appliance, in particular a dishwasher or 8 a washing machine, has an electronic program control. An 9 electric load located in the appliance is switched on and/or off via a switch. Failure of the switch is 11 recognized by the electronic program control. A safety 12 device is activated after recognition of the failure of the -13 switch which disconnects the load from its voltage source.
14 Thus, secondary damage is avoided in the case of such a switch failure.
16 In a household appliance in accordance with the 17 invention, the electronic program control is provided for 18 controlling the rinse and/or wash program. The electrical 19 load located in the machine, such as a circulating pump, is switched on and/or off by the switch, which is a 21 semiconductor or a relay associated with this electronic 22 program control.
23 The electronic program control is designed so that it 24 recognizes a failure of the semiconductor element or relay.
In the case of a critical failure of such a component, such 26 as a short circuit, a safety device disconnects the load in 27 the shorted circuit from its voltage source.
28 This safety device includes a switch element operated 29 by the electronic program control to switch off the shorted circuit. In order to avoid a high component expenditure in 31 the case of several circuits to be protected, it is 32 advantageous to provide only one safety eleme~t-, which is 33 triggered by the program control in the case of recognition 34 of t~e failure of any semiconductor component or relay, to switch off the entire voltage supply of the device.
36 Preferably, the household appliance has a water safety '' i 219226P5 1 device having a safety element that disconnects the load in 2 the shorted circuit from a voltage supply in the case of 3 leaks or overflowing of a tank containing material to be 4 rinsed and/or washed. The safety element also disconnects a supply valve allowing liquid to flow into the tank, and 6 the electronic program control. The water safety device 7 also may be used for avoiding secondary faults in the case 8 of failure of a semiconductor element. For this, the 9 supply valve is shifted into an uninterrupted switched-on status by the electronic program control, so that water 11 runs into the device continuously. When the critical level 12 is reached, the tank overflows. The safety element of the 13 water safety device recognizes this tank overflow and 14 switches off the supply valve, the electronic program control, the shorted circuit, and preferably all loads in 16 the device.
17 In this way a secondary fault can be prevented with an 18 existing water safety device without additional component 19 expense in the case of failure of a semiconductor element or relay.
22 The invention is explained in greater detail below by 23 means of a specific embodiment as shown in the drawing.
24 The Figure shows a schematic wiring diagram of an electronic control according to the invention~ -27 The drawing shows a circuit plan of a dishwasher 28 having an electronic program control 6, which is connected 29 with a voltage source via a main switch 1. Switches, such as semiconductor elements or relays, for controlling a 31 moto~ 2 of a discharge pump, a supply valve 4, and at least 32 one further load 5, such as a circulating pump, are located 33 in the electronic program control 6.
~ 21~2265 1 In addition, the dishwasher is equipped with a water 2 safety device. This water safety device includes a float 3 switch 3 provided in a leakage water collecting device in 4 the bottom of the dishwasher. In the case of leakage in the dishwasher or overflowing of a tank 8 containing 6 material to be rinsed and rinse liquid, the float switch 3 7 is triggered by the liquid collecting in the bottom of the 8 collecting device. A switch device 7 of the float switch 3 9 is designed as a double-pole, double-throw switch, which, in a connected state, disconnects the motor 2 of the 11 discharge pump from the electronic program control 6 and 12 connects it directly to the voltage supply of the device.
13 By releasing the float switch 3 the circuits of all loads 14 2, 4, and 5, controlled by the electronic program control 6, are interrupted simultaneously.
16 The electronic program control 6 is capable of l? recognizing if a load 5 is activated in an undesirable way, 18 which indicates a failure of the controlling semiconductor 19 element. If such a fault appears, the electronic program control 6 reacts after recognizing the failure in such a 21 way that its control program executes a fault handling 22 routine. In this routine, a continuous water supply is 23 triggered by uninterrupted triggering of the supply valve 24 4. When a maximum tank level is reached, the further supplied water is conducted via an overflow conduit to the 26 leakage water collecting device, now shown, in the bottom 27 of the dishwasher. This leakage water which collects 28 triggers the float valve 3, which completes the intentional 29 separation of all loads 2, 4 and thus also the load 5 located in the fault circuit, from the power supply. The 31 motor 2 is then reconnected to the power supply in a 32 different circuit. This prevents a secondary fault in the 33 device from appearing because of an undesirably activated 34 load 5.
IThe embodiments described are exemplary. The 36 invention includes modifications within the scope of the 37 claims.
Claims (15)
WHAT IS CLAIMED IS:
1. A household appliance comprising an electronic program control; a switch; and an electric load connected to a power supply and switched on and/or off via the switch, wherein the electronic program control recognizes a failure of the switch characterized by the fact that a safety device is activated after recognition of the failure of the switch and disconnects the load (5) from the power supply.
2. A household device in accordance with claim 1, characterized by the fact that the safety device comprises a switch element that is activated by the electronic program control (6) and disconnects the load (5) from the power supply.
3. A household device in accordance with claim 1, characterized by the fact that the safety device comprises a switch element that is activated by the electronic program control (6) and switches off power to the appliance.
4. A household device in accordance with claim 1, further comprising a tank (8) and a supply valve (4) allowing liquid into the tank, characterized by the fact that a water safety device is provided as the safety device, wherein the water safety device comprises a safety element (3) that disconnects the electric load (5), the supply valve (4), and the electronic program control (6) from the power supply, the water safety device being activated in the case of a failure of the switch.
5. A household device in accordance with claim 4, characterized by the fact that the electric load (5) and the electronic program control (6) are switched off after actuation of the water safety device.
6. A household device in accordance with claim 4, characterized by the fact that the safety element (3) comprises a float switch in the circuit of the electric load (2, 4, 5) and the electronic program control (6).
7. A household device in accordance with claim 4, characterized by the fact that actuation of the water safety device can be triggered by intentional overflowing of the tank.
8. A household device in accordance with claim 7, characterized by the fact that the overflowing of the tank is triggered by a fault processing program including an uninterrupted control of the water supply valve (4).
9. A household device in accordance with claim 5, characterized by the fact that the safety element (3) comprises a float switch in the circuit of the electric load (2, 4, 5) and the electronic program control (6).
10. A household device in accordance with claim 9, characterized by the fact that actuation of the water safety device can be triggered by intentional overflowing of the tank.
11. A household device in accordance with claim 10, characterized by the fact that the overflowing of the rinse or wash tank is triggered by a fault processing program including an uninterrupted control of the water supply valve (4).
12. A household device in accordance with claim 5, characterized by the fact that actuation of the water safety device can be triggered by intentional overflowing of the tank.
13. A household device in accordance with claim 12, characterized by the fact that the overflowing of the rinse or wash tank is triggered by a fault processing program including an uninterrupted control of the water supply valve (4).
14. A household device in accordance with claim 6, characterized by the fact that actuation of the water safety device can be triggered by intentional overflowing of the tank.
15. A household device in accordance with claim 14, characterized by the fact that the overflowing of the rinse or wash tank is triggered by a fault processing program including an uninterrupted control of the water supply valve (4).
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE19547393.0 | 1995-12-19 | ||
| DE19547393A DE19547393B4 (en) | 1995-12-19 | 1995-12-19 | Household appliance with electronic program control |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2192265A1 true CA2192265A1 (en) | 1997-06-20 |
Family
ID=7780540
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002192265A Abandoned CA2192265A1 (en) | 1995-12-19 | 1996-12-06 | Household appliance with electronic program control |
Country Status (2)
| Country | Link |
|---|---|
| CA (1) | CA2192265A1 (en) |
| DE (1) | DE19547393B4 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3928679A1 (en) * | 2020-06-22 | 2021-12-29 | Illinois Tool Works, Inc. | Warewash machine or other food equipment machine with contactor monitoring system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10259738A1 (en) * | 2002-12-19 | 2004-07-15 | BSH Bosch und Siemens Hausgeräte GmbH | Electronic component system for controlling a household appliance and household appliance |
| DE102008006512A1 (en) * | 2008-01-29 | 2009-07-30 | BSH Bosch und Siemens Hausgeräte GmbH | Circuit arrangement for operating a domestic appliance and corresponding method |
| DE102009046083A1 (en) * | 2009-10-28 | 2011-05-12 | BSH Bosch und Siemens Hausgeräte GmbH | Household appliance, in particular dishwasher |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE2539279C2 (en) * | 1975-09-04 | 1987-05-07 | Dieter Gräßlin Feinwerktechnik, 7742 St Georgen | Leak protection for electrical appliances |
| DE2918048A1 (en) * | 1979-05-04 | 1980-11-13 | Eckart Dr Ing Mueller | Domestic machine security circuit against damage by water - cuts off water and electricity on detecting floor moisture |
| US4645886A (en) * | 1984-11-09 | 1987-02-24 | Cuisinarts, Inc. | Switch for automatically providing a safety function when its contacts are fused together in the "ON" position |
| DE3544307A1 (en) * | 1985-12-14 | 1987-06-19 | Licentia Gmbh | Household appliance with a water connection |
| DE3639476A1 (en) * | 1986-11-18 | 1988-05-19 | Willi Fischer | Safety device at pressure lines |
| DE9010890U1 (en) * | 1990-07-21 | 1991-11-21 | Licentia Patent-Verwaltungs-Gmbh, 6000 Frankfurt | Leakage water indicator, especially in household washing machines and dishwashers |
| KR0126736Y1 (en) * | 1992-07-09 | 1998-12-15 | 강진구 | Heater safety device of a washing machine |
-
1995
- 1995-12-19 DE DE19547393A patent/DE19547393B4/en not_active Expired - Fee Related
-
1996
- 1996-12-06 CA CA002192265A patent/CA2192265A1/en not_active Abandoned
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP3928679A1 (en) * | 2020-06-22 | 2021-12-29 | Illinois Tool Works, Inc. | Warewash machine or other food equipment machine with contactor monitoring system |
| US11881362B2 (en) | 2020-06-22 | 2024-01-23 | Illinois Tool Works Inc. | Warewash machine or other food equipment machine with contactor monitoring system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE19547393B4 (en) | 2004-08-12 |
| DE19547393A1 (en) | 1997-06-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |