US20100189570A1

US20100189570A1 - Intelligent auto-sensing pumping device

Info

Publication number: US20100189570A1
Application number: US12/007,479
Authority: US
Inventors: Hung-Chen Hsu
Original assignee: HUNG PUMP INDUSTRIAL Co Ltd
Current assignee: HUNG PUMP INDUSTRIAL Co Ltd
Priority date: 2008-01-10
Filing date: 2008-01-10
Publication date: 2010-07-29

Abstract

The present creation includes at least a control circuit for performing the start, stop or test run modes of a motor, and a detection loop composed of two detection circuits, the two detection circuits connecting the control circuit to the motor and the guide of a waterproof case respectively. When there is no water or the water is pumped off, the pumping device remains in the stopped state due to disconnection of the detection loop. As the water level reaches the guide and enables conduction in the detection loop, the circuits of the motor would be actuated and work in accordance with the modes set by the control circuit.

Description

FIELD OF THE INVENTION

The present creation relates to a pumping device improvement, and aims to provide an intelligent auto-sensing pumping device with dual modes for starting the operation of a motor.

BACKGROUND OF THE INVENTION

As shown in FIG. 1, there is a structural sectional view of a conventional submerged pump. The submerged pump consists of an impeller 83 driven by a rotating shaft 821 mounted at the end of the rotating shaft 821 of a motor 82, wherein the impeller 83 is enclosed in a water engine 81 and the motor 82 is fastened to the top of the water engine 81, and the rotating shaft 821 extends into the interior of the water engine 81 and is assembled and combined with the impeller 83. Furthermore, a waterproof case 84 is mounted on the exterior of the motor 82 and control circuits such as a capacitor are housed in the waterproof case 84.
That is to say, the motor 82 is employed to drive and rotate the impeller 83 in order to vary the flow velocity and the flow capacity of liquid under the effect of the water engine 81, and thus to achieve the purpose of liquid pressurization or delivery to high altitudes. Also, most of general submerged pumps are equipped with water level sensing devices relative thereto, such that when the water level of a working environment is lower than where the pumps could run smoothly, the pumps would be stopped to avoid no-load running, motor burnout or waste of electric power.
However, a float ball is used to detect water levels in most conventional submerged pumps, so that if the submerged pump was tilted or overturned, the float ball could not operate properly and thus the function of controlling the motor to start or stop would fail. Even though the submerged pump was not tilted or overturned in use, the function of controlling the motor to start or stop may fail since floating objects block the float ball. In addition, owing to the limitation of the location where such float ball is disposed, when the float ball reaches the lowest bottom, it cannot work, so that the water in the bottom could not be pumped off would cause an excess of residual water.

SUMMARY OF THE INVENTION

The present creation has been made in view of the above-mentioned problems that the prior art has, and its object is to provide an intelligent auto-sensing pumping device with hidden water level detection function, which can ensure that the pumping device would start the operation of the motor in the presence of water, so as to achieve the functions of power save and damage or accident prevention, especially unnecessary to be afraid of tilt or turnover in use, as well as even in a cramped working environment and/or blocked by floating foreign objects, the pumping device can still effectively control the motor to start or to stop.
To achieve the foregoing objectives, the pumping device of the present creation mainly includes a control circuit disposed inside a waterproof case for conducting the start, stop or test run modes of a motor, and a detection loop composed of two detection circuits, the two detection circuits connecting the control circuit to the motor and a guide (e.g. an oil hole screw or a sensor bar) of the waterproof case respectively. When there is no water, the pumping device remains in the stopped state due to disconnection detected by the detection loop. As the water level reaches the guide and enables conduction in the detection loop, the circuits of the motor would be actuated and work in accordance with the modes set by the control circuit. When the water is pumped off and a low no-load current generates, the pumping device would stop automatically. Or, when there is water but the guide is covered by sludge and then out of action, the converter unit in the control circuit would be automatically switched to another control mode, so that the pumping device could automatically continue to operate and pump water in order to achieve the use of another automatic detection mode for starting the automatic control mode of water pumping.
The first effect of the present creation lies in that the detection loop is completely hidden inside the waterproof case so as not to be blocked by floating foreign objects.
The second effect of the present creation lies in that the detection loop is a non-mechanical water level detecting element, so it could operate normally even though the submerged pump is tilted or overturned.
The third effect of the present creation lies in that when the guide is out of action, it could be still automatically switched to another control mode in order to obtain the normal operation effect.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a structural sectional view of a conventional submerged pump.

FIG. 2 is a structural outline of the pumping device according to the present creation.

FIG. 3 (A) is a structural sectional view of the pumping device according to the present creation.

FIG. 3 (B) is another structural sectional view of the pumping device according to the present creation.

FIG. 4 is a schematic diagram showing a service condition of the pumping device capable of normal start-up according to the present creation.

FIG. 5 is a schematic diagram showing a service condition of the pumping device incapable of normal start-up according to the present creation.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

As shown in FIGS. 2 and 3, the intelligent auto-sensing pumping device of the present creation includes a water engine 11, a motor 12, an impeller 13, a waterproof case 14, a control circuit 15 and a detection loop 16.
The water engine 11 is provided for configuring a channel which varies the flow velocity and the flow capacity of liquid; the motor 12 is correspondingly arranged on the top of the water engine 11 and equipped with a rotating shaft 121 correspondingly passing through the water engine 11 and extending into the interior thereof; the impeller 13 is enclosed in the water engine 11 and connected with the rotating shaft 121 of the motor 12 so as to rotate with the rotating shaft 121; the waterproof case 14 is correspondingly mounted on the exterior of the motor 12 and a guide 141 is disposed thereon, the guide 141, as shown in FIG. 3(A), is an oil hole screw 21 disposed at the waterproof case 14, or as shown in FIG. 3(B), is a sensor bar 22 disposed at the waterproof case 14.
The above control circuit 15 is disposed inside the waterproof case 14 and provided with a converter unit in order to perform the start, stop or test run modes of the motor 12 and to use the converter unit for automatically converting various operating modes. Moreover, the detection loop 16 is composed of two detection circuits 161, and the two detection circuits 161 connect the control circuit 15 to the motor 12 and the guide 141 of the waterproof case 14 respectively. As shown in FIG. 3(A), the oil hole screw 21 is further connected with the detection circuit 161 by a copper pin 23.
In embodiment of the present creation, the control circuit 15 can set up two operating modes as below:
Mode A: When the guide 141 can activate the detection normally, the converter unit would be automatically switched to this operating mode. The entire pumping device must exist in the working environment as shown in FIG. 4, whose water level reaches the guide 141 to turn on the detection loop 16 (at this time, the detection loop could detect the water level), such that the circuit of the control circuit 15 would drive the motor 12 to pump water. As the pumping device stays running until no water is present (at this time, the control circuit 15 would detect a low no-load current), or is blocked by foreign objects or an overload is generated due to the occurrence of abnormality on the motor, the pumping device would stop automatically.
Mode B: When the guide 141 is covered by wet sludge or foreign objects and fails to activate the detection properly, as shown in FIG. 5, the converter unit would be automatically switched to this operating mode. There is an intelligent restart function previously set up in this operating mode by the control circuit 15. After the motor stops due to the occurrence of abnormal circumstances (no-load running or overload running), it does not need to turn off the power supply and restart it. The control circuit 15 would count the time and automatically perform the operations that runs with water and stops without water repeatedly followed by a setting time (e.g. 3 minutes) until the wet sludge or foreign objects are removed. Then, the converter unit returns to the operating mode A.
It is worth mentioning that the detection loop 16 is completely hidden inside the waterproof case 14 so as not to be blocked by floating foreign objects. In particular, the detection loop 16 is a non-mechanical water level detecting element, so it could operate normally even though the submerged pump is tilted or overturned. Furthermore, the guide 141 can be disposed at different locations on the waterproof case 14 to adjust the starting requirements at different water levels, thus obtaining a better safety protection effect.
The examples and drawings has been described above are the preferred embodiments of the present invention only, it is not intended to limit the scope of the present creation, hence all similar or equivalent changes and modifications made according to the claims and specification fall within the scope of the claims.

Claims

1. An intelligent auto-sensing pumping device comprising:

a pump casing, provided for configuring a channel which varies the flow velocity and the flow capacity of liquid;

a motor, correspondingly arranged on the top of the pump casing and equipped with a rotating shaft correspondingly passing through the pump casing and extending into the interior thereof;

an impeller, enclosed in the pump casing and connected with the rotating shaft of the motor;

a waterproof case, correspondingly mounted on the exterior of the motor and a guide being disposed thereon;

a control circuit, disposed inside the waterproof case and provided with a converter unit to perform the operating mode of the motor; and

a detection loop, composed of two detection circuits, the two detection circuits connecting the control circuit to the motor and the guide respectively.

2. The pumping device as described in claim 1, wherein the guide is an oil hole screw disposed at the waterproof case, and the oil hole screw is connected with the detection circuit by a copper pin.

3. The pumping device as described in claim 1, wherein the guide is a sensor bar disposed at the waterproof case.

4. The pumping device as described in claim 1, wherein the control circuit automatically determines whether the motor is no-load running and triggers the motor to turn off.

5. The pumping device as described in claim 1, wherein the control circuit automatically determines whether the motor is overload running and triggers the motor to turn off.

6. The pumping device as described in claim 1, wherein the control circuit can set up an intelligent restart function to restart the operation of the motor with automatic timing after the motor stops due to the occurrence of abnormal circumstances.

7. The pumping device as described in claim 1, wherein the detection loop automatically triggers the motor to turn off under the condition of the guide covered by sludge.

8. The pumping device as described in claim 1, wherein the control circuit automatically determines whether the motor is no-load or overload running and triggers the motor to turn off; and restarts the operation of the motor with automatic timing after the motor stops due to the occurrence of abnormal circumstances; and the detection loop automatically triggers the motor to turn off under the condition of the guide covered by sludge.

9. The pumping device as described in claim 1, wherein the guide is disposed on the top of the waterproof case.