Valve control in an HVAC system with sensors
First Claim
1. A method of controlling opening of a valve in an HVAC system to regulate a flow φ
- of a fluid through a heat exchanger of the HVAC system, the fluid being a heat transport medium circulating in a fluid circuit, the method including;
controlling the opening of the valve according to a default control mode in dependence of a default sensor signal, the default sensor signal being indicative of at least one parameter of the fluid;
determining, while controlling the opening of the valve according to the default control mode, whether the default sensor signal is faulty;
switching, in case of the default sensor signal being faulty, to controlling the opening of the valve according to a fallback control mode, with the opening of the valve being controlled independently of the faulty sensor signal in the fallback control mode;
determining, by a sensor testing unit in a substantially continuous way while controlling the opening of the valve according to the fallback control mode, whether the previously faulty default sensor signal is non-faulty, anddynamically switching back to controlling the opening of the valve according to the default control mode, in case of the default sensor signal being non-faulty.
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Accused Products
Abstract
The present disclosure is directed towards a method of controlling opening of a valve (10) in an HVAC system (100). The method includes controlling the opening of the valve (10) according to a default control mode in dependence of a default sensor signal. The method further includes determining, while controlling the opening of the valve (10) according to the default control mode, whether the default sensor signal is faulty and switching, in case of the default sensor signal being faulty, to controlling the opening of the valve (10) according to a fallback control mode, with the opening of the valve (10) being controlled independently of the faulty sensor signal in the fallback control mode. The present invention is further directed towards a corresponding control device opening of a valve (10) in an HVAC system as well as a corresponding computer program product.
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Citations
16 Claims
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1. A method of controlling opening of a valve in an HVAC system to regulate a flow φ
- of a fluid through a heat exchanger of the HVAC system, the fluid being a heat transport medium circulating in a fluid circuit, the method including;
controlling the opening of the valve according to a default control mode in dependence of a default sensor signal, the default sensor signal being indicative of at least one parameter of the fluid; determining, while controlling the opening of the valve according to the default control mode, whether the default sensor signal is faulty; switching, in case of the default sensor signal being faulty, to controlling the opening of the valve according to a fallback control mode, with the opening of the valve being controlled independently of the faulty sensor signal in the fallback control mode; determining, by a sensor testing unit in a substantially continuous way while controlling the opening of the valve according to the fallback control mode, whether the previously faulty default sensor signal is non-faulty, and dynamically switching back to controlling the opening of the valve according to the default control mode, in case of the default sensor signal being non-faulty. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11)
- of a fluid through a heat exchanger of the HVAC system, the fluid being a heat transport medium circulating in a fluid circuit, the method including;
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12. A control device for controlling opening of a valve in an HVAC system to regulate a flow φ
- of a fluid through a heat exchanger of the HVAC system, the fluid being a heat transport medium circulating in a fluid circuit, and adjust an amount of energy per time, E, that is exchanged by the heat exchanger, the control device including at least one sensor for receiving a default sensor signal, the control device further including a processor, the processor being configured;
to control the opening of the valve according to a default control mode in dependence of the default sensor signal, the default sensor signal being indicative of at least one parameter of the fluid; to determine, while controlling the opening of the valve according to the default control mode, whether the default sensor signal is faulty; to switch, in case of the default sensor signal being faulty, to controlling the opening of the valve according to a fallback control mode, with the opening of the valve being controlled independently of the faulty default sensor signal in the fallback control mode; to determine, by a sensor testing unit in a substantially continuous way while controlling the opening of the valve according to the fallback control mode, whether the previously faulty default sensor signal is non-faulty, and to dynamically switch back to controlling the opening of the valve according to the default control mode, in case of the default sensor signal being non-faulty. - View Dependent Claims (13, 14, 15)
- of a fluid through a heat exchanger of the HVAC system, the fluid being a heat transport medium circulating in a fluid circuit, and adjust an amount of energy per time, E, that is exchanged by the heat exchanger, the control device including at least one sensor for receiving a default sensor signal, the control device further including a processor, the processor being configured;
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16. A computer program product including a non-transient computer readable medium having stored therein computer program code configured to direct a processor of a control device for controlling opening of a valve in an HVAC system to regulate a flow φ
- of a fluid through a heat exchanger of the HVAC system, the fluid being a heat transport medium circulating in a fluid circuit, and adjust an amount of energy per time, E, that is exchanged by the heat exchanger by;
controlling the opening of the valve according to a default control mode in dependence of a default sensor signal, the default sensor signal reflecting at least one parameter of the HVAC system; determining, while controlling the opening of the valve according to the default control mode, whether the default sensor signal is faulty; switching, in case of the default sensor signal being faulty, to controlling the opening of the valve according to a fallback control mode, with the opening of the valve being controlled independently of the faulty default sensor signal in the fallback control mode; determining, by a sensor testing unit in a substantially continuous way while controlling the opening of the valve according to the fallback control mode, whether the previously faulty default sensor signal is non-faulty, and dynamically switching back to controlling the opening of the valve according to the default control mode, in case of the default sensor signal being non-faulty.
- of a fluid through a heat exchanger of the HVAC system, the fluid being a heat transport medium circulating in a fluid circuit, and adjust an amount of energy per time, E, that is exchanged by the heat exchanger by;
Specification