Heating unit

Patent metadata

Field	Value
Publication number	US-10012395-B2
Application number	US-201214371078-A
Country	US
Kind code	B2
Filing date	Dec 13, 2012
Priority date	Jan 9, 2012
Publication date	Jul 3, 2018
Grant date	Jul 3, 2018

Abstract

A heating apparatus includes two heating circuits ( 3, 4 ), one for room heating ( 3 ) and one for domestic water heating ( 4 ). A primary heat exchanger ( 1 ) is provided as well as at least one secondary heat exchanger ( 7 ), for the room heating as well as a secondary heat exchanger ( 9 ) for domestic water heating. A circulation pump ( 6 ) is provided as well as a switch-over valve ( 5 ) which hydraulically integrates the primary heat exchanger ( 1 ) into the first or into the second heating circuit ( 3, 4 ). The heating circuit ( 4 ) for the domestic water heating, on operation of the heating circuit ( 3 ) for room heating, is used as a bypass conduit for the primary heat exchanger ( 1 ), wherein the switch-over valve ( 5 ) forms the bypass valve or is used as a bypass valve.

First claim

The invention claimed is:

1. A heating apparatus comprising:
two heating circuits including a first heating circuit for room heating and a second heating circuit for domestic water heating;
a primary heat exchanger;
at least one secondary heat exchanger for the domestic water heating;
another secondary heat exchanger for the room heating;
a circulation pump;
a switch-over valve which hydraulically integrates the primary heat exchanger into the first or into the second heating circuit wherein the heating circuit for the domestic water heating, on operation of the heating circuit for room heating, forms a bypass conduit for the primary heat exchanger, and the switch-over valve forms the bypass valve;
a detection means for detecting the necessity of a bypass function, the detection means being provided in the region of the primary heat exchanger; and
a control which on detecting the necessity of the bypass function, activates the switch-over valve for the conduit connection to the heating circuit for domestic water heating to define a bypass state of the switch-over valve, wherein a bypass fluid flow path is formed when the switch-over valve is in the bypass state, the bypass fluid flow path comprising the second heating circuit, the switch-over valve, the circulation pump and the primary heat exchanger, wherein fluid moves along the bypass fluid flow path when the switch-over valve is in the bypass state, wherein no bypass valve is integrated in the switch-over valve, wherein the switch-over valve is controlled such that the switch over valve operates as the bypass valve, wherein an outlet line of the another secondary heat exchanger is connected to the at least one secondary heat exchanger for the domestic water heating in the bypass state.

2. A heating apparatus according to claim 1 , wherein the detection means for detecting the necessity of a bypass function comprises a temperature sensor.

3. A heating apparatus according to claim 1 , wherein the detection means for detecting the necessity of bypass function comprises a flow meter.

4. A heating apparatus according to claim 1 , wherein the detection means for detecting the necessity of a bypass function comprise a pressure sensor.

5. A heating apparatus according to claim 1 , further comprising a pressure-limitation means provided in the switch-over valve and on exceeding a predefined pressure form a further conduit connection between the primary heat exchanger and the bypass conduit.

6. A heating apparatus according to claim 1 , wherein the switch-over valve is designed for actuation in two modes comprising a first mode for a rapid opening and a second mode for a slow closure.

7. A heating apparatus according to claim 1 , wherein the switch-over valve is activatable in a modulating manner for producing a flow resistance.

8. A heating apparatus according to claim 1 , wherein the switch-over valve is arranged in the feed to the heating circuits.

9. A heating apparatus according to claim 1 , wherein the switch-over valve is arranged in the return to the heating circuits.

10. A heating apparatus according to claim 1 , further comprising a pump with a pump housing, wherein the switch-over valve is arranged in the pump housing.

11. A heating apparatus according to claim 1 , further comprising a circulation pump motor and a terminal box, the circulation pump motor being connected to the circulation pump, wherein the control for the switch-over valve is arranged in the terminal box of the motor of the circulation pump.

12. A heating method comprising:
providing a heating apparatus comprising:
two heating circuits including a first heating circuit for room heating and a second heating circuit for domestic water heating;
a primary heat exchanger for introducing heat into the heating circuits;
at least one secondary heat exchanger for the domestic water heating;
another secondary heat exchanger for the room heating;
a circulation pump;
a switch-over valve which hydraulically integrates the primary heat exchanger into the first or into the second heating circuit wherein the heating circuit for the domestic water heating, on operation of the heating circuit for room heating, forms a bypass conduit for the primary heat exchanger, and the switch-over valve forms the bypass valve;
a detection means for detecting the necessity of a bypass function the detection means being provided in the region of the primary heat exchanger; and
a control which on detecting the necessity of the bypass function, activates the switch-over valve for the conduit connection to the heating circuit for domestic water heating to define a bypass state of the switch-over valve, wherein a bypass fluid flow path is formed when the switch-over valve is in the bypass state, the bypass fluid flow path comprising the second heating circuit, the switch-over valve, the circulation pump and the primary heat exchanger, wherein fluid moves along the bypass fluid flow path when the switch-over valve is in the bypass state, wherein no bypass valve is integrated in the switch-over valve, wherein the switch-over valve is controlled such that the switch over valve operates as the bypass valve, wherein an outlet line of the another secondary heat exchanger is connected to the at least one secondary heat exchanger for the domestic water heating in the bypass state.

13. A heating method according to claim 12 , further comprising:
detecting the necessity of a bypass function with the detection means provided in the region of the primary heat exchanger.

14. A heating method according to claim 13 , wherein the detection means for detecting the necessity of a bypass function comprises a temperature sensor.

15. A heating method according to claim 13 , wherein the detection means for detecting the necessity of bypass function comprises a flow meter.

16. A heating method according to claim 13 , wherein the detection means for detecting the necessity of a bypass function comprise a pressure sensor.

17. A heating method according to claim 12 , further comprising:
providing a pressure-limitation means in the switch-over valve acting on exceeding a predefined pressure form a further conduit connection between the primary heat exchanger and the bypass conduit.

18. A heating method according to claim 12 , wherein the switch-over valve actuates in two modes comprising a first mode for a rapid opening and a second mode for a slow closure.

19. A heating method according to claim 12 , wherein the switch-over valve is activated in a modulating manner for producing a flow resistance.

20. A heating apparatus comprising:
a plurality of heating circuits, the plurality of heating circuits comprising a first heating circuit for room heating and a second heating circuit for domestic water heating;
a primary heat exchanger;
a secondary domestic water heat exchanger for the domestic water heating;
a secondary room heating heat exchanger for the room heating, the secondary room heating heat exchanger comprising an outlet;
an outlet line connected to the outlet of the secondary room heating heat exchanger;
a circulation pump;
a switch-over valve which hydraulically integrates the primary heat exchanger into the first heating circuit or into the second heating circuit, wherein the heating circuit for the domestic water heating, on operation of the heating circuit for room heating, forms a bypass conduit for the primary heat exchanger, the switch-over valve comprising a bypass position, the outlet line being in fluid communicatio

Assignees

• Grundfos Holding As

Inventors

• Olesen Thomas Young

Classifications

• F24D3/08

  in combination with systems for domestic hot-water supply · CPC title

• F24D19/1021

  a by pass valve · CPC title

• F16K11/20

  operated by separate actuating members (with one plug turning in another F16K11/12) · CPC title

• F24D19/1066 Primary

  for the combination of central heating and domestic hot water · CPC title

• F24D19/1069

  regulation in function of the temperature of the domestic hot water · CPC title