Pool-cleaning pumping system with multi-mode control and dry-run protection

Abstract

A pool cleaning and pumping system with multi-mode control and anti-dry-run protection includes a control device and a pumping device. The control device is electrically connected to the pumping device and includes a timed start unit, a liquid level control unit, a manual operation unit, a motor control unit, a dry-run protection unit, and an overload protection unit. The timed start unit generates a pool cleaning control signal when a set time is reached. The liquid level control unit generates a daily drainage control signal based on the water level. The manual operation unit generates a manual start control signal. The dry-run protection unit and the overload protection unit form a safety interlock path, and when the pumping device experiences dry-running, overload, or other abnormal operating conditions, the motor control unit stops the pumping device. After the abnormal operating condition is resolved, the liquid level control unit can resume daily drainage control based on the water level.

Claims

1. A pool cleaning and pumping system with multi-mode control and anti-dry-run protection, applicable to a pool, comprising: a pumping device for pumping water out of the pool; and a control device electrically connected to the pumping device for controlling the opening and closing of the pumping device, the control device comprising: a time-controlled start unit for generating a pool cleaning control signal when a set time is reached; a liquid level control unit for generating a daily drainage control signal based on a water level state of the pool; and a manual operation unit for generating a manual start control signal. A motor control unit includes a start control terminal and a safety control terminal. The start control terminal is used to receive the pool cleaning control signal, the daily drainage control signal, and the manual start control signal. The motor control unit controls the operation of the pumping device according to the pool cleaning control signal, the daily drainage control signal, or the manual start control signal. A safety protection unit is electrically connected to the safety control terminal of the motor control unit. The safety protection unit is used to stop the operation of the pumping device when the pumping device is in an abnormal operating state. When the abnormal operating state does not occur, the motor control unit controls the operation of the pumping device according to the pool cleaning control signal, the daily drainage control signal, or the manual start control signal. When the motor control unit controls the pumping device according to the daily drainage control signal, the liquid level control unit starts the pumping device when the aforementioned water level meets a drainage condition and stops the pumping device when the aforementioned water level meets a stop condition. Furthermore, after the safety protection unit stops the operation of the pumping device due to the abnormal operating state, if the abnormal operating state has been resolved, the liquid level control unit can still generate the daily drainage control signal according to the water level, so that the motor control unit can resume daily drainage control of the pumping device.

2. The pool cleaning pumping system with multi-mode control and anti-dry-run protection as described in claim 1, wherein, The time-controlled start unit includes a time-controlled switch and an isolation relay. When the set time is reached, the time-controlled switch drives the isolation relay, causing the isolation relay to output the pool cleaning control signal.

3. The pool cleaning pumping system with multi-mode control and anti-dry-run protection as described in claim 1, wherein, The liquid level control unit includes a liquid level controller and a liquid level sensing switch. The liquid level sensing switch is used to detect the high water level state and the low water level state of the water tank, so that the liquid level controller generates the daily drainage control signal when the water level state is high and stops generating the daily drainage control signal when the water level state is low.

4. The pool cleaning pumping system with multi-mode control and anti-dry-run protection as described in claim 1, wherein, The pool cleaning control signal, the daily drainage control signal, and the manual start control signal are input to the start control terminal of the motor control unit in parallel.

5. The pool cleaning pumping system with multi-mode control and anti-dry-run protection as described in claim 1, wherein, The safety protection unit includes an idle protection unit and an overload protection unit. The idle protection unit and the overload protection unit form a safety interlock path, which is electrically connected to the safety control terminal of the motor control unit.

6. The pool cleaning pumping system with multi-mode control and anti-dry-run protection as described in claim 5, wherein, The safety interlocking path is formed by connecting the overload protection unit and the idling protection unit in series.

7. The pool cleaning pumping system with multi-mode control and anti-dry-run protection as described in claim 5, wherein, The idling protection unit has a sensing element, through which one of the main power lines of the pumping device passes, enabling the idling protection unit to detect the idling state of the pumping device by means of the change in the operating current of the main power line.

8. The pool cleaning pumping system with multi-mode control and anti-dry-run protection as described in claim 7, wherein, When the main power line passes through the sensing part, it remains completely insulated without being cut or stripped.

9. The pool cleaning pumping system with multi-mode control and anti-dry-run protection as described in claim 1, wherein, The motor control unit is a motor contactor. The start control terminal is the excitation terminal of the first coil of the motor contactor, and the safety control terminal is the excitation terminal of the second coil of the motor contactor.

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