HEATING UNIT

• US 20150014425A1
• Filed: 12/13/2012
• Published: 01/15/2015
• Est. Priority Date: 01/09/2012
• Status: Active Grant

• Current Assignee: Grundfos Holding A/S (POUL DUE Jensen's FOND)
• Original Assignee: Grundfos Holding A/S (POUL DUE Jensen's FOND)
• Inventors: Olesen, Thomas Young
• Granted Patent: US 10,012,395 B2
• Time in Patent Office: Days
• US Class Current: 237/8.C
• CPC Class Codes: F16K 11/20 operated by separate actuating members with one plug turning in another F16K11/12
• CPC Class Codes: F16K 17/02 opening on surplus pressure on one side; closing on insufficient pressure on one side check valves F16K15/00
• CPC Class Codes: F24D 19/1021 a by pass valve
• CPC Class Codes: F24D 19/1066 for the combination of central heating and domestic hot water
• CPC Class Codes: F24D 19/1069 regulation in function of the temperature of the domestic hot water
• CPC Class Codes: F24D 3/08 in combination with systems for domestic hot-water supply

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.

Claims

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;

a circulation pump; and

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.

2. A heating apparatus according to claim 1, further comprising:

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.

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

4. A heating apparatus according to claim 2, wherein the detection means for detecting the necessity of bypass function comprises a flow meter.

5. A heating apparatus according to claim 2, wherein the detection means for detecting the necessity of a bypass function comprise a pressure sensor.

6. 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.

7. 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.

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

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

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

11. 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.

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

13. A heating method comprising:

heating apparatus 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;

a circulation pump; and

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.

14. A heating apparatus according to claim 13, further comprising:

detecting the necessity of a bypass function with a detection means provided in the region of the primary heat exchanger; and

providing 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.

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

16. A heating method according to claim 14, wherein the detection means for detecting the necessity of bypass function comprises a flow meter.

17. A heating method according to claim 14, wherein the detection means for detecting the necessity of a bypass function comprise a pressure sensor.

18. A heating method according to claim 13, 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.

19. A heating method according to claim 13, 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.

20. A heating method according to claim 13, wherein the switch-over valve is activated in a modulating manner for producing a flow resistance.