Classifications

• • 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
  • D06F39/00—Details of washing machines not specific to a single type of machines covered by groups D06F9/00 - D06F27/00 
  • D06F39/08—Liquid supply or discharge arrangements
  • D06F39/083—Liquid discharge or recirculation arrangements
  • D06F39/085—Arrangements or adaptations of pumps
• • 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
  • D06F33/00—Control of operations performed in washing machines or washer-dryers 
  • D06F33/30—Control of washing machines characterised by the purpose or target of the control 
  • D06F33/47—Responding to irregular working conditions, e.g. malfunctioning of pumps 
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F04—POSITIVE - DISPLACEMENT MACHINES FOR LIQUIDS; PUMPS FOR LIQUIDS OR ELASTIC FLUIDS
  • F04D—NON-POSITIVE-DISPLACEMENT PUMPS
  • F04D15/00—Control, e.g. regulation, of pumps, pumping installations or systems
  • F04D15/02—Stopping of pumps, or operating valves, on occurrence of unwanted conditions
  • F04D15/0209—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid
  • F04D15/0218—Stopping of pumps, or operating valves, on occurrence of unwanted conditions responsive to a condition of the working fluid the condition being a liquid level or a lack of liquid supply
  • F04D15/0236—Lack of liquid level being detected by analysing the parameters of the electric drive, e.g. current or power consumption
• • 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
  • D06F2103/00—Parameters monitored or detected for the control of domestic laundry washing machines, washer-dryers or laundry dryers
  • D06F2103/44—Current or voltage
  • D06F2103/48—Current or voltage of the motor driving the pump
• • 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
  • D06F2105/00—Systems or parameters controlled or affected by the control systems of washing machines, washer-dryers or laundry dryers
  • D06F2105/58—Indications or alarms to the control system or to the user
• • 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
  • D06F33/00—Control of operations performed in washing machines or washer-dryers 
  • D06F33/50—Control of washer-dryers characterised by the purpose or target of the control
  • D06F33/72—Control of the energy or water consumption

Definitions

• the invention is related to a method that provides electronic control of working periods of the synchronous or asynchronous drain pump motors used in electrical home appliances such as dish washing machines and washing machines.
• the drain pump In the control systems of the existing dish washing and washing machines, the drain pump is in operated along a fixed operating time period at places required by the washing program. This fixed time period, is over the time needed to drain the water out by the drain pump under normal conditions. For example, a drain pump of 16 liters/minute, can empty the water content of 5 liters of water in a washing machine in a short time period but, it is operated for a fixed time period of 1 minute. Similarly, drain pumps are operated half or more of the operating periods in the existing control systems without need for it. This unnecessary operation, despite water is drained by the drain pump, continues without water, to complete the operation period.
• the drain pump operating without water is forming the highest source of noise in the machine that is sucking air from it. Despite there is no water in the machine, the drain pump continues to operate and results in unnecessary energy consumption. For example, in "normal" program of dish washing machine, a drain pump of 34W power operating at an average of 5.5 minutes, uses 3.2 wH energy. The drain pump when operated without need for it at 50% of this period. 1.6 wH unnecessary energy consumption is faced with.
• the drain pump draws different currents from the network while there is water in the machine (loaded) and while there is no water in it (unloaded). For example, a drain pump of 34W, if started to operate with a load over 3.5 liters, draws more or less 125 mA current but after the water in the machine is drained, the current drawn by the pump from the network is decreased to about 110 mA.
• the objective of this invention is to provide a method by taking the difference of current drawn from the network by the drain pump while operating with and without load as the base, is to control the pump operating time, the values of the current drawn by the pump with electronic control and in parallel to this, to prevent the energy consumption arising out of unnecessary operation, to decrease the noise and to shorten the duration of the program.
• Figure 1 is the electronic circuit diagram that controls the pump with microprocessor 1) and measures the currents drawn by the drain pump (2).
• Figure 2 is the circuit diagram in which " current transformer” (6) is used instead of " Manganin based resistance” (3).
• FIG. 3 is the circuit diagram in which a "Hall effect transistor” (7) is used instead of " Manganin based resistance” (3).
• drain pump is controlled by a microprocessor 1).
• laboratory experiments are carried out and the difference of the currents drawn by the pump while operating with and without load are recorded. These values are saved to the memory of a microprocessor (1).
• a circuit formed by a "manganin based resistance” (3), a “ op-amp” (4) and a “ AC-DC converter” (5) is used ( Figure 1).
• a " current transformer” (6) or a “Hall effect transistor” (7) can also be used.
• a directly proportional voltage is formed on the manganin based resistance (3) which is connected to the line from the drain pump (2) over the microprocessor (1).
• This voltage is transmitted to a op-amp (4) circuit such that the highest value is increased to 5V AC.
• the voltage increasing at 0-5 V AC level in Op-amp (4) circuit is converted into direct voltage in the AC-DC converter (5) circuit and transmitted to the microprocessor(l). This information coming into the microprocessor 1) as analog is later converted into digital information. If the voltage transmitted to microprocessor (1) is constantly above 5V, it means that the drain pump (2) is blocked.
• the current drawn is started to be measured.
• This time period being dependent on take off time of the pump, may change between 5-10 seconds.
• This measurement period changes depending on the microprocessor and software used. In the present method, the time required for this is 640 ⁇ s with PIC 16C74 microprocessor.
• the values recorded during the first five seconds after starting the measurements are compared with each other and the largest value is saved in the memory as the operation loaded value (I' ⁇ oaded )• To compare the values with each other, a time period which is different from five seconds, may be preferred.

Landscapes

• Engineering & Computer Science (AREA)
• Textile Engineering (AREA)
• Mechanical Engineering (AREA)
• General Engineering & Computer Science (AREA)
• Control Of Positive-Displacement Pumps (AREA)
• Washing And Drying Of Tableware (AREA)
• Control Of Non-Positive-Displacement Pumps (AREA)
• Devices For Blowing Cold Air, Devices For Blowing Warm Air, And Means For Preventing Water Condensation In Air Conditioning Units (AREA)

Applications Claiming Priority (3)

Publications (2)

Family

ID=21621188

Family Applications (1)

Country Status (7)

Families Citing this family (12)

Family Cites Families (2)

• 1997
  • 1997-06-20 TR TR97/00528A patent/TR199700528A3/tr unknown
• 1998
  • 1998-06-19 ES ES98932707T patent/ES2201510T3/es not_active Expired - Lifetime
  • 1998-06-19 WO PCT/TR1998/000011 patent/WO1998059174A1/en not_active Ceased
  • 1998-06-19 EP EP98932707A patent/EP0920591B1/de not_active Expired - Lifetime
  • 1998-06-19 AT AT98932707T patent/ATE242430T1/de not_active IP Right Cessation
  • 1998-06-19 DE DE69815261T patent/DE69815261T2/de not_active Expired - Lifetime
  • 1998-06-19 AU AU82525/98A patent/AU8252598A/en not_active Abandoned

Non-Patent Citations (1)

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