Dish washing machine

• US 20050028850A1
• Filed: 08/06/2004
• Published: 02/10/2005
• Est. Priority Date: 08/08/2003
• Status: Abandoned Application

• Current Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Sanyo Electric Company Limited (Panasonic Holdings Corporation)
• Inventors: Suzuki, Hajime, Nito, Hideyuki, Suo, Kiyoyuki
• Application Number:
  US10/912,184
• Publication Number:
  US 20050028850A1
• Time in Patent Office: Days
• US Class Current: 134/200
• CPC Class Codes: A47L 15/0049 Detection or prevention of malfunction, including accident prevention arrangements to prevent clogging of filters A47L15/4208; safety arrangements for preventing water damage A47L15/421
• CPC Class Codes: A47L 15/4236 Arrangements to sterilize or disinfect dishes or washing liquids A47L15/4234 takes precedence
• CPC Class Codes: A47L 15/4297 Arrangements for detecting or measuring the condition of the washing water, e.g. turbidity
• CPC Class Codes: A47L 2401/09 Water level
• CPC Class Codes: A47L 2401/10 Water cloudiness or dirtiness, e.g. turbidity, foaming or level of bacteria
• CPC Class Codes: A47L 2501/03 Water recirculation, e.g. control of distributing valves for redirection of water flow
• CPC Class Codes: A47L 2501/30 Regulation of machine operational steps within the washing process, e.g. performing an additional rinsing phase, shortening or stopping of the drying phase, washing at decreased noise operation conditions

Abstract

A dish washing machine according to the present invention carries out a soaking step in a kitchen detergent course. In this step, a water supplying and draining FD1 for 25 seconds (water supplying for 4 seconds) is carried out (step E6), and thereafter a water supplying and draining FD2 for 30 seconds (water supplying for 22 seconds) is carried out(step E8). Thereby, a larger amount of wash water is flowed into a washing and draining pump, and foam left in a washing tank and foam stored in the washing and draining pump can be well discharged together with tap water supplied into the washing tank at a washing and draining time to the outside of the dish washing machine.

Claims

1. A dish washing machine capable of carrying out a special detergent course for washing dishes with a special detergent and a kitchen detergent course for washing the dishes with a kitchen detergent, including

a washing tank,

a water spraying step carrying out means for carrying out a water spray step for spraying water toward dishes contained in the washing tank,

a draining step carrying out means for carrying out a draining step for draining water in the washing tank after the water spray step, and

a water supplying step carrying out means for carrying out a water supplying step for supplying water into the washing tank in the way of the draining step,

in which, in the kitchen detergent course, the water supplying step carrying out means carries out the water supplying step for a longer time than in the special detergent course.

2. A dish washing machine as set forth in claim 1, in which, since the water supplying step carrying out means carries out the water supplying step for a longer time, the time of water supply and draining carried out at the same time also becomes longer, so that foam in the washing tank can be removed away.

3. A dish washing machine capable of carrying out a kitchen detergent course for washing dishes with a kitchen detergent, including

a washing tank,

a rinsing step carrying out means for carrying out a rinsing step for spraying water toward dishes contained in the washing tank to rinse the dishes, and

a foam removing means for causing foam formed in the washing tank to go out of existence in course of time by stopping spraying the water toward the dishes for a predetermined time while carrying out the rinsing step in the kitchen detergent course.

4. A dish washing machine as set forth in claim 3, including

a foam detecting means for detecting whether more than a predetermined amount of foam is formed in the washing tank or not, and

a rinsing step extending means for extending the rinsing step when the foam detecting means detected that more than the predetermined amount of foam is formed in the washing tank while the rinsing step carrying out means is carrying out the rinsing step.

5. A dish washing machine as set forth in claim 4, in which

the rinsing step carries out a rinsing operation for spraying water toward the dishes contained in the washing tank to rinse the dishes and thereafter draining water in the washing tank for predetermined number of times, and

the rinsing step extending means increases a carrying out time number of the rinsing operation based on a detection by the foam detecting means that more than the predetermined amount of foam is formed in the washing tank during the rinsing step,

the dish washing machine further including a foam removing operation carrying out means for carrying out a foam removing operation for removing the foam formed in the washing tank when the carrying out time number of the rinsing operation increased by the rinsing step extending means becomes over a predetermined number.

6. A dish washing machine including

a washing tank,

a water spraying step carrying out means for carrying out a water spray step for spraying water toward dishes contained in the washing tank,

a draining step carrying out means for carrying out a draining step for draining the water in the washing tank to the outside of the dish washing machine,

a washing and draining pump for sucking the water in the washing tank thereinto provided with a spray outlet opening for discharging the sucked water in the water spraying step and a drain outlet opening for discharging the sucked water in the draining step, in which when the water is discharged from the drain outlet opening in the draining step, a less amount of water, than the amount of water discharged from the drain outlet opening, is also discharged from the spray outlet opening, and

a driving control means for controlling a driving of the washing and draining pump so that the discharge amount of the washing and draining pump can be increased in the draining step carried out after the water spraying step.

7. A dish washing machine as set forth in claim 6, in which the driving control means increases the discharge amount of the washing and draining pump by reversely rotating the washing and draining pump at high speed.

8. A dish washing machine as set forth in claim 7, including

a foam sensor for detecting whether more than a predetermined amount of foam is formed in the washing tank or not, and

a sensor washing water channel communicated with the drain outlet opening for leading water drained in the draining step to the foam sensor side thereby to wash the foam sensor.