Electric control apparatus for dishwashing machine

• US 5,006,767 A
• Filed: 03/02/1990
• Issued: 04/09/1991
• Est. Priority Date: 03/03/1989
• Status: Expired due to Fees

• Current Assignee: Hoshizaki Denki Kabushiki Kaisha
• Original Assignee: Hoshizaki Denki Kabushiki Kaisha
• Inventors: Suyama, Koji, Kamino, Hiroaki, Kuwahara, Tokihiro, Suyama, Tomio, Nagata, Osamu, Maruyama, Fumio
• Primary Examiner(s): Ro, Bentsu
• Application Number:
  US07/487,327
• Time in Patent Office: 403 Days
• Field of Search: 318/567, 318/49, 318/51, 318/53, 318/101, 318/102, 318/103, 68/12 R, 134/18, 134/25.1, 134/25.2, 134/56 R, 134/56 D, 134/57 R, 134/57 D, 134/58 R, 134/58 D
• US Class Current: 318/103
• CPC Class Codes: A47L 15/0078 with a plurality of fluid recirculation arrangements, e.g. with separated washing liquid and rinsing liquid recirculation circuits
• CPC Class Codes: A47L 15/4217 Fittings for water supply, e.g. valves or plumbing means to connect to cold or warm water lines, aquastops
• CPC Class Codes: A47L 15/4225 Arrangements or adaption of recirculation or discharge pumps
• CPC Class Codes: A47L 15/4287 Temperature measuring or regulating arrangements
• CPC Class Codes: A47L 15/4289 Spray-pressure measuring or regulating arrangements nozzles A47L15/4278
• CPC Class Codes: A47L 2301/06 Crockery or tableware details, e.g. material, quantity, condition
• CPC Class Codes: A47L 2501/03 Water recirculation, e.g. control of distributing valves for redirection of water flow
• CPC Class Codes: A47L 2501/06 Water heaters

Abstract

In a dishwashing machine having a washing chamber, an electrically operated wash pump for pumping out wash water from a wash tank in the washing chamber, an electrically operated rinse pump for pumping out heated water from a gas booster heater, and wash and rinse arms arranged within the washing chamber to be supplied with the wash and heated water from the wash and rinse pumps for directing jet streams of the wash and heated water to tableware racked in the washing chamber respectively, an electric control apparatus is arranged to mix cold water from a source of cold water into the heated water to form mixing water and to control the rinse pump such that the rinse arm directs jet stream of the mixing water to the racked tableware. The electric control apparatus is further arranged to control the wash pump in response to finish in control of the rinse pump such that the wash arm directs jet stream of the wash water to the racked tableware and to again control the rinse pump in response to finish in control of the wash pump such that the rinse arm directs jet stream of the heated water to the racked tableware.

Claims

1. An electric control apparatus for a dishwashing machine having a washing chamber, a first electric power operated pumping means for pumping out wash water from a wash water storage tank in said washing chamber, a second electric power operated pumping means for pumping out heated water from a heated water storage tank, and first and second revolving arms arranged within said washing chamber to be supplied with the wash and heated water from said first and second electric power operated pumping means for directing jet streams of the wash and heated water to a rack of tableware placed in said washing chamber respectively, comprising;

mixing means for mixing cold water from a source of cold water into the heated water to form mixing water;

first means for controlling said second electric power operated pumping means such that said second revolving arm directs jet stream of the mixing water from said mixing means to said rack of tableware;

second means responsive to finish in control of said first means for controlling said first electric power operated pumping means such that said first revolving arm directs jet stream of the wash water to said rack of tableware; and

third means responsive to finish in control of said second means for controlling said second electric power operated pumping means such that said second revolving arm directs jet stream of the heated water to said rack of tableware.

12. An electric control apparatus as claimed in claim 1, 2, 4, 5, 9, 8 or 11, wherein said mixing means is arranged to include;

a first pipe connected between said source of cold water and said heated water storage tank and having an opening end portion immersed into the heated water within said heated water storage tank through a peripheral wall thereof;

a second pipe connected between said heated water storage tank and said second revolving arm and having an opening end portion immersed into the heated water within said heated water storage tank through the peripheral wall thereof to face the opening end portion of said first pipe by way of a gap; and

an electrically operated mixing valve disposed wherein said first pipe for being selectively opened to permit mixing of cold water from said source of cold water into the heated water within the gap through said first pipe so as to form mixing water within the gap; and

wherein said second electric power operated pumping means is arranged to include a pump disposed within said second pipe for selectively pumping the mixing water within the gap through said second pipe into said second revolving arm.

2. An electric control apparatus for a dishwashing machine having a washing chamber, a first electric power operated pumping means for pumping out wash water from a wash water storage tank in said washing chamber, a second electric power operated pumping means for pumping out heated water from a heated water storage tank, and first and second revolving arms arranged within said washing chamber to be supplied with the wash and heated water from said first and second electric power operated pumping means for directing jet streams of the wash and heated water to a rack of tableware placed in said washing chamber respectively, comprising;

mixing means for mixing cold water from a source of cold water into the heated water to form mixing water;

first means for controlling said first electric power operated pumping means such that the first revolving arm directs jet stream of the wash water to said rack of tableware;

second means responsive to finish in control of said first means for controlling said second electric power operated pumping means such that the second revolving arm directs jet stream of the heated water to said rack of tableware; and

third means responsive to finish in control of said second means for controlling said second electric power operated pumping means such that said second revolving arm directs jet stream of the mixing water from said mixing means to said rack of tableware.

3. An electric control apparatus as claimed in claim 2, further comprising fourth means for controlling said second electric power operated pumping means such that said second revolving arm directs jet stream of the mixing water from said mixing means to said rack of tableware.

4. An electric control apparatus for a dishwashing machine having a washing chamber, a first electric power operated pumping means for pumping out wash water from a wash water storage tank in said washing chamber, a second electric power operated pumping means for pumping out heated water from a heated water storage tank, and first and second revolving arms arranged within said washing chamber to be supplied with the wash and heated water from said first and second electric power operated pumping means for directing jet streams of the wash and heated water to a rack of tableware placed in said washing chamber respectively, comprising;

manipulation means for being manipulated in a first manipulating condition when said tableware has large heat capacity and for being amnipulated in a second manipulating condition when said tableware has small heat capacity;

mixing means for mixing cold water from a source of cold water into the heated water to form mixing water;

first means responsive to the first manipulating condition of said manipulation means for controlling said first and second electric power operated pumping means in sequence such that said first and second revolving arms direct jet streams of the wash and heated water to said rack of tableware with large heat capacity;

second means responsive to the second manipulating condition of said manipulation means for controlling said second electric power operated pumping means such that said second revolving arm directs jet stream of the mixing water to said rack of tableware with small heat capacity;

third means responsive to finish in control of said second means for controlling said first electric power operated pumping means such that said first revolving arm directs jet stream of the wash water to said rack of tableware with small heat capacity; and

fourth means responsive to finish in control of the third means for controlling said second electric power operated pumping means such that said second revolving arm directs jet stream of the heated water to said rack of tableware with small heat capacity.

5. An electric control apparatus for a dishwashing machine having a washing chamber, a first electric power operated pumping means for pumping out wash water from a wash water storage tank in said washing chamber, a second electric power operated pumping means for pumping out heated water from a heated water storage tank, and first and second revolving arms arranged within said washing chamber to be supplied with the wash and heated water from said first and second electric power operated pumping means for directing jet streams of the wash and heated water to a rack of tableware placed in said washing chamber respectively, comprising;

manipulation means for being manipulated in a first manipulating condition when said tableware has large heat capacity and for being manipulated in a second manipulating condition when said tableware has small heat capacity;

mixing means for mixing cold water from a source of cold water into the heated water to form mixing water;

first means responsive to the first manipulating condition of said manipulation means for controlling said first and second electric power operated pumping means in sequence such that said first and second revolving arms direct jet streams of the wash and heated water to said rack of tableware with large heat capacity;

second means responsive to the second manipulating condition of said manipulation means for controlling said first electric power operated pumping means such that said first revolving arm directs jet stream of the wash water to said rack of tableware with small heat capacity;

third means responsive to finish in control of said secod means for controlling said second electric power operated pumping means such that said second revolving arm directs jet stream of the heated water to said rack of tableware with small heat capacity; and

fourth means responsive to finish in control of said third means for controlling said second electric power operated pumping means such that said second revolving arm directs jet stream of the mixing water to said rack of tableware with small heat capacity.

6. An electric control apparatus as claimed in claim 5, further comprising fifth means responsive to the second manipulating condition of said manipulation means for controlling said second electric power operated pumping means prior to control of said second means such that said second revolving arm directs jet stream of the mixing water to said rack of tableware with small heat capacity.

7. An electric control apparatus for a dishwashing machine having a washing chamber, a first electric power operated pumping means for pumping out wash water from a wash water storage tank in said washing chamber, a second electric power operated pumping means for pumping out heated water from a heated water storage tank, and first and second revolving arms arranged within said washing chamber to be supplied with the wash and heated water from said first and second electric power operated pumping means for directing jet streams of the wash and heated water to a rack of tableware of small heat capacity placed in said washing chamber respectively, comprising;

first means for controlling said second electric power operated pumping means such that said second revolving arm directs jet stream of the heated water to said rack of tableware of small heat capacity so as to warm it in low temperature;

second means responsive to finish in control of said first means for controlling said first electric power operated pumping means such that said first revolving arm directs jet stream of the wash water to said rack of tableware of small heat capacity; and

third means responsive to finish in control of said second means for controlling said second electric power operated pumping means such that said second revolving arm directs jet stream of the heated water to said rack of tableware of small heat capacity.

8. An electric control apparatus as claimed in claim 7, further comprising mixing means for mixing cold water from a source of cold water into the heated water to form mixing water;

wherein said first means is arranged to control said second electric power operated pumping means such that said second revolving arm directs jet stream of the mixing water to said rack of tableware of small heat capacity so as to warm it in the low temperature.

9. An electric control apparatus as claimed in claim 7, further comprising mixing means for mixing cold water from a source of cold water into the heated water to form mixing water;

wherein said second revolving arm is arranged to direct jet stream of the mixing water in the midst of control of said third means.

10. An electric control apparatus for a dishwashing machine having a washing chamber, a first electric power operated pumping means for pumping out wash water from a wash water storage tank in said washing chamber, a second electric power operated pumping means for pumping out heated water from a heated water storage tank, and first and second revolving arms arranged within said washing chamber to be supplied with the wash and heated water from said first and second electric power operated pumping means for directing jet streams of the wash and heated water to a rack of tableware placed in said washing chamber respectively, comprising;

manipulating means for being manipulated in a first manipulating condition when said tableware has large heat capacity and for being manipulated in a second manipulating condition when said tableware has small heat capacity;

first means responsive to the first manipulating condition of said manipulation means for controlling said first and second electric power operated pumping menas in sequence such that said first and second revolving arms direct jet streams of the wash and heated water to said rack of tableware with large heat capacity;

second means responsive to the second manipulating condition of said manipulation means for controlling said second electric power operated pumping means such that said second revolving arm directs jet stream of the heated water to said rack of tableware with small heat capacity so as to warm it in low temperature;

third means responsive to finish in control of said second means for controlling said first electric power operated pumping means such that said first revolving arm directs jet stream of the wash water to said rack of tableware with small heat capacity; and

fourth means responsive to finish in control of said third means for controlling said second electric power operated pumping means such that said second revolving arm directs jet stream of the heated water to said rack of tableware with small heat capacity.

11. An electric control apparatus as claimed in claim 10, further comprising mixing means for mixing cold water from a source of cold water into the heated water to form mixing water;

wherein said second revolving arm is arranged to direct jet stream of the mixing water in the midst of control of said fourth means.