Dish washing machine

• US 20050022847A1
• Filed: 07/30/2004
• Published: 02/03/2005
• Est. Priority Date: 07/31/2003
• 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:
  US10/902,526
• Publication Number:
  US 20050022847A1
• Time in Patent Office: Days
• US Class Current: 134/57.D
• CPC Class Codes: A47L 15/0005 Rinsing phases, e.g. pre-rinsing, intermediate rinsing, final rinsing
• CPC Class Codes: A47L 15/0026 Rinsing phases
• CPC Class Codes: A47L 2301/04 Operation mode, e.g. delicate washing, economy washing, reduced time, sterilizing, water softener regenerating, odor eliminating or service
• 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
• CPC Class Codes: A47L 2601/02 Pressurised cleaning liquid delivered by a pump

Abstract

A dish washing machine according to the present invention carries out, in a kitchen detergent course, a soaking step for spraying a wash water stored in a containing tank toward dishes and leaving the dishes for a predetermined time precedent to a washing step. In the soaking step, a low temperature soaking is carried out in which the wash water in a washing tank is kept at about 30° C. (temperature appropriate for removing soils containing protein ingredients with a kitchen detergent, especially a neutral detergent), and thereafter a high temperature soaking is carried out in which the wash water in the washing tank is kept at about 50° C. Thereby, the soils containing protein ingredients attached to the dishes can be well removed away with the kitchen detergent.

Claims

1. A dish washing machine including

a containing tank capable of containing dishes therein,

a wash water spraying means for spraying a wash water toward the dishes contained in the containing tank,

a means for carrying out a washing step for spraying the wash water toward the dishes contained in the containing tank by the wash water spraying means and thereby washing the dishes,

a soaking step carrying out means for carrying out, precedent to the washing step, a soaking step for spraying the wash water toward the dishes contained in the containing tank by the wash water spraying means and leaving the dishes for a predetermined time, and

a water temperature control means for controlling temperature of the wash water to be sprayed toward the dishes in the soaking step so as to be a temperature appropriate for removing soils attached to the dishes.

2. A dish washing machine as set forth in claim 1, in which the water temperature control means keeps the temperature of the wash water at about 30°

C.

3. A dish washing machine as set forth in claim 1, in which a user can select one from a special detergent course in which the dishes are washed with a special detergent and a kitchen detergent course in which the dishes are washed with a kitchen detergent.

4. A dish washing machine as set forth in claim 3, in which the soaking step carrying out means functions only when the kitchen detergent course is selected.

5. A dish washing machine as set forth in claim 4, in which the water temperature control means keeps the temperature of the wash water at about 30°

C.

6. A dish washing machine including

a containing tank capable of containing dishes therein,

a wash water spraying means for spraying a wash water toward the dishes contained in the containing tank,

a means for carrying out a washing step for spraying the wash water toward the dishes contained in the containing tank by the wash water spraying means and thereby washing the dishes,

a soaking step carrying out means for carrying out, precedent to the washing step, a soaking step for spraying the wash water toward the dishes contained in the containing tank by the wash water spraying means and leaving the dishes for a predetermined time, and

a soaking time control means for changing the predetermined time for leaving the dishes.

7. A dish washing machine as set forth in claim 6, in which a user can select one from a special detergent course in which the dishes are washed with a special detergent and a kitchen detergent course in which the dishes are washed with a kitchen detergent.

8. A dish washing machine as set forth in claim 7., in which the soaking step carrying out means functions only when the kitchen detergent course is selected.

9. A dish washing machine as set forth in claim 8;

in which a user can select either of plural washing courses according to the amount and the kind of dishes to be washed, the state of soils attached to the dishes and the like, and

the soaking time control means changes the predetermined time based on the selected course.

10. 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 containing tank in which a wash water can be stored, and

a draining means which, when hot water is supplied into the containing tank for washing the dishes, does not drain the hot water stored in the containing tank in the kitchen detergent course, but drains the hot water stored in the containing tank in the special detergent course for a predetermined time from the start of supplying the hot water.

11. A dish washing machine as set forth in claim 10, including a soaking step carrying out means for carrying out, precedent to a washing step, a soaking step for spraying the wash water toward the dishes contained in the containing tank and leaving the dishes for a predetermined time in a case of the kitchen detergent course being selected.

12. A dish washing machine as set forth in claim 11, including a water temperature control means for controlling the temperature of the wash water to be sprayed toward the dishes in the soaking step.

13. A dish washing machine as set forth in claim 12, in which the water temperature control means keeps the temperature of the wash water at about 30°

C.

14. A dish washing machine as set forth in claim 11, in which the soaking step carrying out means carries out a low temperature soaking and a high temperature soaking in this order, and

the water temperature control means keeps the temperature of the wash water at about 30°

C. in the low temperature soaking and at about 50°

C. in the high temperature soaking.

15. A dish washing machine as set forth in claim 14, including a soaking time control means for changing the predetermined time for leaving the dishes between the low temperature soaking and the high temperature soaking.

16. A dish washing machine including

a containing tank capable of containing dishes therein,

a water spraying means for spraying water toward the dishes contained in the containing tank,

a means for carrying out a rinsing step for spraying the water toward the dishes contained in the containing tank by the water spraying means and thereby rinsing the dishes,

a foam removing step carrying out means for carrying out, precedent to the rinsing step, a foam removing step for spraying the water toward the dishes contained in the containing tank by the wash water spraying means and thereby removing foam in the containing tank.

17. A dish washing machine as set forth in claim 16, in which the foam removing step for spraying the water toward the dishes contained in the containing tank by the water spraying means and leaving the dishes for a predetermined time.

18. A dish washing machine as set forth in claim 17, including a water temperature control means for controlling the temperature of the water to be sprayed toward the dishes in the foam removing step.