Toilet apparatus

Patent metadata

Field	Value
Publication number	US-9663933-B2
Application number	US-201514713418-A
Country	US
Kind code	B2
Filing date	May 15, 2015
Priority date	May 15, 2015
Publication date	May 30, 2017
Grant date	May 30, 2017

Abstract

A toilet apparatus includes a toilet bowl with a seat, a reservoir for containing water for flushing the toilet bowl, and a water jet device including a conduit with an inlet, an outlet, and a nozzle at the outlet and located in the toilet bowl for generating a water jet to clean a user. A thermoelectric heat pump having a cold side in thermal communication with water in the reservoir extracts heat from the water in the reservoir and a hot side in thermal communication with a conduit section of the conduit supplies heat extracted from water in the reservoir and increases the temperature of water flowing through the conduit.

First claim

The invention claimed is:

1. A toilet apparatus comprising:
a toilet bowl with a seat;
a reservoir for containing water for flushing the toilet bowl;
a water jet device comprising a conduit with an inlet, an outlet, and a nozzle at the outlet and located in the toilet bowl for generating a water jet to clean a user seated on the seat of the toilet bowl; and
a thermoelectric heat pump having a cold side in thermal communication with and extracting heat from water in the reservoir, and a hot side in thermal communication with a conduit section of the conduit for supplying heat extracted from water in the reservoir to water flowing through the conduit section to the nozzle, wherein the thermoelectric heat pump is located on a wall of the reservoir.

2. The toilet apparatus as claimed in claim 1 , wherein the thermoelectric heat pump includes a Peltier device.

3. The toilet apparatus as claimed in claim 1 , wherein
the thermoelectric heat pump includes a passage associated with the hot side, and
the passage is in fluid communication with the conduit for flow of water to the conduit section.

4. The toilet apparatus as claimed in claim 3 , wherein the passage extends within the hot side of the thermoelectric heat pump in a tortuous path.

5. A The toilet apparatus comprising:
a toilet bowl with a seat;
a reservoir for containing water for flushing the toilet bowl;
a water jet device comprising a conduit with an inlet, an outlet, and a nozzle at the outlet and located in the toilet bowl for generating a water jet to clean a user seated on the seat of the toilet bowl; and
a thermoelectric heat pump having a cold side extracting heat from water in the reservoir, and a hot side in thermal communication with a conduit section of the conduit for supplying heat extracted from water in the reservoir to water flowing through the conduit section to the nozzle, wherein a wall of the reservoir has an aperture in which the thermoelectric heat pump is located, with the cold side within or facing inwardly into the reservoir and in thermal communication with water in the reservoir.

6. The toilet apparatus as claimed in claim 5 , wherein the cold side of the thermoelectric heat pump includes a finned or pinned thermal conductor in contact with water in the reservoir.

7. The toilet apparatus as claimed in claim 5 , wherein the thermoelectric heat pump includes a Peltier device.

8. The toilet apparatus as claimed in claim 5 , wherein
the thermoelectric heat pump includes passage associated with the hot side, and
the passage is in fluid communication with the conduit for flow of water to the conduit section.

9. The toilet apparatus as claimed in claim 8 , wherein the passage extends within the hot side of the thermoelectric heat pump in a tortuous path.

10. A toilet apparatus comprising:
a toilet bowl with a seat;
a reservoir for containing water for flushing the toilet bowl;
a water jet device comprising a conduit with an inlet, an outlet, and a nozzle at the outlet and located in the toilet bowl for generating a water jet to clean a user seated on the seat of the toilet bowl;
a thermoelectric heat pump having a cold side in thermal communication with and extracting heat from water extracted from the reservoir, and a hot side in thermal communication with a conduit section of the conduit for supplying heat extracted from water in the reservoir to increase the temperature of water flowing through the conduit, wherein the thermoelectric heat pump includes
a first passage associated with the hot side and in fluid communication with the conduit section and located centrally within the thermoelectric heat pump for flow of water heated by the thermoelectric heat pump to the nozzle; and
a second passage associated with the cold side surrounding the first passage and the thermoelectric heat pump; and;

a first tube having first and second ends with the first end of the first tube located in the water in the reservoir and the second end of the first tube in fluid communication with a first end of the second passage for extracting water from the reservoir and supplying the water extracted to the second passage, and a second tube having first and second ends with the first end of the second tube in fluid communication with a second end of the second passage and the second end of the second tube in the reservoir for returning water extracted from the reservoir to the reservoir after flow of the water through the second passage over the thermoelectric heat pump.

11. The toilet apparatus as claimed in claimer 10 , wherein the second passage has a tubular configuration, through which the conduit section extends.

12. The toilet apparatus as claimed in claim 10 , wherein
the thermoelectric heat pump comprises at least three Peltier devices which are arranged to surround the conduit section, and
each of the Peltier devices includes a hot side and a cold side and the hot sides face inwardly with respect to the conduit section.

13. The toilet apparatus as claimed in claim 12 , wherein the thermoelectric heat pump includes
at least one outer thermal conductor in contact with the cold sides of the Peltier devices, and the second passage extends over the cold sides of the Peltier devices, and
at least one inner thermal conductor in contact with the hot sides of the Peltier devices, and the conduit section extends over the hot sides of the Peltier devices.

14. The toilet apparatus as claimed in claim 13 , wherein at least one of the at least one outer thermal conductor and the at least one inner thermal conductor has an integral tubular construction.

15. The toilet apparatus as claimed in claim 14 , wherein the at least one outer thermal conductor has an integral tubular construction including an outer side surrounded by a water jacket which provides the second passage.

16. The toilet apparatus as claimed in claim 14 , wherein the at least one inner thermal conductor has an integral tubular construction including an inner side having one of channels, ribs, and splines.

Assignees

• Defond Components Ltd
• Defond Holdings (H K ) Co Ltd

Inventors

• Chan Kai Chi
• Yu Kwok Chiu
• Lok Yu Chi

Classifications

• E03D9/08 Primary

  Devices in the bowl producing upwardly-directed sprays; Modifications of the bowl for use with such devices (showers A47K3/28; bathing devices for special therapeutic or hygienic purposes A61H33/00, for specific parts of the body A61H35/00 ){; Bidets; Combinations of bowls with urinals or bidets; Hot-air or other devices mounted in or on the bowl, urinal or bidet for cleaning or disinfecting} · CPC title

• F24H1/101

  using electric energy supply · CPC title

• F25B21/02

  using Peltier effect; using Nernst-Ettinghausen effect · CPC title

• E03D11/02

  Water-closet bowls (auxiliary chambers with connections to flushing water for bowl-cleaning utensils E03D9/06; modified for using upwardly-directed sprays E03D9/08; seats or covers A47K13/00 ){; Bowls with a double odour seal optionally with provisions for a good siphonic action; siphons as part of the bowl (parts or details of bowls E03D11/13)} · CPC title

• E03D2201/00

  Details and methods of use for water closets and urinals not otherwise provided for · CPC title