Regulating method for a heating and/or cooling system with at least one load circuit

Patent metadata

Field	Value
Publication number	US-9851163-B2
Application number	US-201414534641-A
Country	US
Kind code	B2
Filing date	Nov 6, 2014
Priority date	Nov 7, 2013
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

A regulating method for a heating and/or cooling system uses at least one load circuit ( 6 ), through which a fluid as a heat transfer medium flows and switches the at least one load circuit ( 6 ) on and off in dependence on a room temperature in a room to be thermally regulated by the at least one load circuit ( 6 ). A feed temperature (T mix ) of the fluid fed to the at least one load circuit ( 6 ) is set in dependence on the relative switch-on duration (D) of the at least one load circuit ( 6 ). A manifold device is also provided for a heating and/or cooling system with a control device for carrying out such a regulating method.

First claim

What is claimed is:

1. A regulating method for a heating and/or cooling system, the regulating method comprising the steps of:
providing at least one load circuit, through which a fluid as a heat transfer medium flows;
switching the at least one load circuit on and off in dependence on a room temperature in a room to be thermally regulated by the load circuit; and
setting a feed temperature of the fluid fed to the at least one load circuit in dependence on the relative switch-on duration of the at least one load circuit, the relative switch-on duration corresponding to a ratio of the switch-on duration to a time interval between a switching-on of the at least one load circuit and a subsequent, renewed switching-on of the at least one load circuit.

2. A regulating method according to claim 1 , wherein the load circuit is used for heating the room and at least one of:
the feed temperature is increased if the relative switch-on duration exceeds a predefined limit value; and
the feed temperature is lowered if the switch-on duration falls short of a predefined limit value.

3. A regulating method according to claim 2 , wherein the feed temperature is changed by a proportional amount on falling short of or exceeding the predefined limit value.

4. A regulating method according to claim 1 , wherein the load circuit is used for cooling the room and at least one of:
the feed temperature is lowered if the relative switch-on duration exceeds a predefined limit value; and
the feed temperature is increased if the relative switch-on duration falls short of a predefined limit value.

5. A regulating method according to claim 4 , wherein the feed temperature is changed by a proportional amount on falling short of or exceeding the predefined limit value.

6. A regulating method according to claim 1 , further comprising the steps of:
providing a mixing device;
using the mixing device for setting the feed temperature such that fluid fed to the at least one load circuit is mixed with fluid from the return of the at least one load circuit.

7. A regulating method according to claim 1 , wherein several load circuits are provided and the relative switch-on duration of that load circuit having the longest relative switch-on durations forms the basis for setting the feed temperature of a fluid fed to all load circuits.

8. A regulating method according to claim 1 , wherein the room temperature is detected in the room to be thermally regulated by the load circuit, and the load circuit is switched off by way of interrupting the volume flow if the room temperature reaches a temperature setpoint.

9. A regulating method according to claim 1 , wherein an entry temperature of the fluid at an entry of the load circuit and an exit temperature of the fluid at an exit of the load circuit are detected, a temperature difference between the entry temperature and the exit temperature is determined, and a volume flow of the fluid through this load circuit is set in dependence on the temperature difference.

10. A regulating method according to claim 1 , further comprising the steps of:
providing a circulation pump, wherein several load circuits are provided and the circulation pump is provided for the several load circuits;
delivering fluid with the circulation pump;
regulating a speed of the circulation pump in a manner such that a differential pressure across the circulation pump corresponds to a predefined pressure difference setpoint.

11. A regulating method according to claim 10 , wherein the pressure difference setpoint for the differential pressure across the circulation pump is set in dependence on the opening degree of at least one of the regulating valves for setting the volume flow in the load circuits.

12. A regulating method according to claim 11 , wherein for setting the pressure difference setpoint for the differential pressure across the circulation pump, a regulating valve which is open the furthest is considered, wherein an opening degree of said regulating valve which is open the furthest is compared to a desired opening degree, and the pressure difference setpoint is increased on exceeding the desired opening degree, and the pressure difference setpoint is reduced on falling short of the desired opening degree.

13. A manifold device for a heating and/or cooling system, the manifold device comprising:
at least one load circuit through which a fluid as a heat transfer medium flows;
a control device configured for carrying out a regulating method, the regulating method comprising the steps of:
switching the at least one load circuit on and off in dependence on a room temperature in a room to be thermally regulated by the load circuit; and
setting a feed temperature of the fluid fed to the at least one load circuit in dependence on the relative switch-on duration of the at least one load circuit, the relative switch-on duration corresponding to a ratio of the switch-on duration to a time interval between a switching-on of the at least one load circuit and a subsequent, renewed switching-on of the at least one load circuit.

14. A manifold device according to claim 13 , further comprising a feed temperature setting device comprising a mixing device in which fluid fed to the at least one load circuit is mixed with fluid from a return of the at least one load circuit.

15. A manifold device according to claim 13 , wherein the mixing device comprises a fluid feed or a mixing conduit connecting the return of the load circuit to the entry of the at least one load circuit and a valve regulating the flow, wherein a valve opening degree is settable by the control device.

16. A manifold device according to claim 13 , further comprising another load circuit such that several load circuits are provided, wherein the feed temperature setting device sets the feed temperature of a fluid fed to all load circuits.

Assignees

• Grundfos Holding As

Inventors

• Baasch Sørensen Erik
• Clausen Martin

Classifications

• F24D3/12 Primary

  Tube and panel arrangements for ceiling, wall, or underfloor heating (electric underfloor heating F24D13/02) · CPC title

• G05D23/1951

  with control of the working time of a temperature controlling device · CPC title

• G05D23/1333

  measuring the temperature of incoming fluid · CPC title

• F28F27/02 Primary

  for controlling the distribution of heat-exchange media between different channels ({static flow control means in header boxes F28F9/026}; arrangements of guide plates or guide vanes F28F9/22, F28F25/12) · CPC title

• F24D19/1009

  for central heating · CPC title