Circulation pump, system and method for domestic hot-water recirculation

A system for domestic hot-water recirculation comprising:

• a circulation pump for supplying hot water, and
• a temperature-controlled bypass valve having a hot water inlet fluidly connected to said circulation pump,
• at least one operation parameter of the circulation pump being tracked,
• the circulation pump further comprising a pump controller configured for controlling a pump motor such that the pump motor cycles between on-phases and off-phases, and
• the pump controller being configured for controlling the pump motor based on said at least one operation parameter and without communicating with the bypass valve,
• wherein the pump controller is further configured to learn, in a learning state, the termination threshold value or range while the pump motor operates in the on-phases, and
• wherein, during an operating state occurring after the learning state, the pump controller terminates the on-phases and initiates the off-phases when said at least one operation parameter reaches the termination threshold value or range learnt during the learning state.

A method for operating a domestic hot-water recirculation system comprising a circulation pump and a temperature-controlled bypass valve,

• the bypass valve having a hot water inlet fluidly connected to said circulation pump,
• the circulation pump comprising a pump motor configured to cycle between on-phases and off-phases,
• the circulation pump further comprising a sensor for measuring at least one operation parameter of the circulation pump,
• the method comprising:
• opening or closing the bypass valve based on a temperature of hot water at the hot water inlet, and
• controlling the pump motor to cycle between on-phases and off-phases based on said at least one operation parameter and without communication between the circulation pump and the bypass valve,
• wherein the circulation pump further comprises a pump controller that is configured to learn, in a learning state, the termination threshold value or range while the pump motor operates in the on-phases, and
• wherein, during an operating state occurring after the learning state, the pump controller terminates the on-phases and initiates the off-phases when said at least one operation parameter reaches the termination threshold value or range learnt during the learning state.

A circulation pump for supplying hot water to a hot water inlet of a temperature-controlled bypass valve for domestic hot-water recirculation,

• the circulation pump comprising a pump controller configured for controlling a pump motor such that the pump motor cycles between on-phases and off-phases,
• the pump controller being configured to track at least one operation parameter of the circulation pump;
• and
• the pump controller being configured such that an on-phase is terminated and an off-phase is initiated when said at least one operation parameter reaches a termination threshold value or range,
• wherein the pump controller determines, during a learning state, the termination threshold value or range based on the at least one tracked operation parameter, and
• wherein the pump controller controls, during an operating state, the pump motor based on the termination threshold value or range learnt during the learning state.

A system for domestic hot-water recirculation comprising:

• a circulation pump for supplying hot water, and
• a temperature-controlled bypass valve having a hot water inlet fluidly connected to said circulation pump,
• at least one operation parameter of the circulation pump being tracked,
• the circulation pump further comprising a pump controller configured for controlling a pump motor such that the pump motor cycles between on-phases and off-phases, and the pump controller being configured for controlling the pump motor based on said at least one operation parameter and without communicating with the bypass valve,
• wherein the pump controller determines, during a learning state, the termination threshold value or range based on the at least one tracked operation parameter, and
• wherein the pump controller controls, during an operating state, the pump motor based on the termination threshold value or range learnt during the learning state.

A method for operating a domestic hot-water recirculation system comprising a circulation pump and a temperature-controlled bypass valve,

• the bypass valve having a hot water inlet fluidly connected to said circulation pump,
• the circulation pump comprising a pump motor configured to cycle between on-phases and off-phases,
• the circulation pump further comprising a sensor for measuring at least one operation parameter of the circulation pump,
• the method comprising:
• opening or closing the bypass valve based on a temperature of hot water at the hot water inlet, and
• controlling the pump motor to cycle between on-phases and off-phases based on said at least one operation parameter and without communication between the circulation pump and the bypass valve,
• wherein the pump controller determines, during a learning state, the termination threshold value or range based on the at least one tracked operation parameter, and
• wherein the pump controller controls, during an operating state, the pump motor based on the termination threshold value or range learnt during the learning state.