EP3091234B1 - Submersible pump - Google Patents

Description

Technical area

The present application relates to a water pump, in particular it relates to a submersible pump.

State of the art

With the help of such a submersible pump liquid from containers, wells, interiors of buildings, etc. can be pumped out. In this aspect, the submerged pump includes a pump main body, wherein the pump main body can be immersed in the liquid to be pumped out and has a suction port, thus, the liquid can be sucked by the pressurized submerged pump and exit through the pressure discharge port. At the location of the pressure outlet opening, a compression line, for example a pressure line, may be connected.

On the outside of the pump main body, a sensor unit is arranged, this sensor unit is coupled to a arranged in the pump main body control unit, with their help, the pump can be turned on and off according to the filling level of the liquid surrounding the pump. For example, it can be provided that when the liquid surrounding the pump reaches the filling level predetermined by the position of the sensor unit, the pump is switched on, and when the filling level drops below the level of the sensor unit, the submersible pump is switched off with a delay. Such a submersible pump is already known from the patent document 200780006651.X published as a utility model Chinese patent document, the patent document discloses a submersible pump having a pump housing, wherein the pump housing can be immersed in the liquid to be pumped out and having a suction port and a pressure outlet opening, thereby For example, the liquid may be sucked into the pump housing through the suction port and be discharged under pressure through the discharge port, and there is an electronic control device, wherein the electronic control device is coupled to a sensor unit disposed on the outside of the housing, and used to adjust the level of fill level the liquid surrounding the pump to turn the submersible pump on and off; wherein the sensor unit is designed as a unit which is height adjustable on the pump housing, the sensor unit comprises a sensor housing, wherein inside the sensor housing two spaced-apart, wetted with liquid electrodes are arranged and a sensor holder is arranged on the outer wall of the pump housing, the Sensor unit can be removably connected to the sensor holder sufficiently, while the sensor holder has a rail, the sensor unit can be clamped to the rail, wherein also the sensor unit has at least one clamping element which is resiliently biased in a clamping position. In the structure described above, as soon as the pair of electrodes on the sensor housing is immersed in the liquid, the submersible pump is turned on and maintains this on state until the level drops below the pair of electrodes. This will ultimately implement an automatic control of the water pump.

In the above content, the use of the arranged on the outer wall of the pump housing sensor unit is obviously feasible. However, the height regulating structure in the above-described sensor unit is complicated and the operational stability is poor.

The US 2013/243573 A1 describes a water pump with a water level sensor. The water level sensor comprises three sensors of different lengths, the tips of which are arranged at different heights. As a result, different water levels can be measured within the water pump.

The WO 2007/112928 A1 also shows a water pump with a water level sensor. The water level sensor comprises two electrodes arranged at the same height. As soon as both electrodes are immersed in an electrically conductive liquid, they are connected to one another in an electrically conductive manner. This is detected by a control unit, which then sets the water pump in motion.

The US 2011/0085917 A1 also shows a water pump with a water level sensor. The water level sensor comprises three capacitive sensors which are arranged at different heights in the water pump. As soon as the respective sensors dip into the water, a circuit is closed via the water so that different water levels can be measured.

The US 2006/0005622 A1 shows a water level sensor for a water pump. The water level sensor comprises a watertight housing in which a plurality of electrodes are arranged. The electrodes can measure field effects to determine a water level.

Subject of the invention

The object of the present application is to provide a submersible pump which solves the above-described deficiencies of the prior art, the height control of the sensor unit of the present submersible pump is relatively straightforward.

To implement the described object, the submersible pump according to the invention according to claim 1 comprises a pump main body and a water level switch; wherein the water level switch substantially at least two sensor units, which are arranged spaced in the vertical direction on the pump main body and all of which can be sufficiently touched by the water; and a control circuit unit that controls the turning on and off of the pump main body by receiving a water signal emitted from an arbitrarily set sensor unit.

In the submersible pump provided above, the plurality of sensor units in the pump main body in the vertical direction make an arrayed arrangement, and there is a fixed height difference between each sensor unit. Therefore, if it is first arbitrarily determined that a sensor is operated when the level of the water environment in which the submerged pump is operating above the specified sensor unit increases, the sensor unit can receive a sufficient water signal and thus control that the water pump automatically turns on and maintains this on status until the level drops below the above-defined sensor unit. At the same time lead in the submersible pump according to the present application, the multiple sensor units in which different heights can be set independently from each other, the fact that the submersible pump can be operated in the automatic control status to trigger the height control of the water level only by selecting different height positions of the sensor unit The entire structure of the sensor unit and the structure of the height control are relatively straightforward, the operational stability is high.

It is possible to provide the above-described at least two sensor units in the form of N water level sensors in electrode form, and N ≥ 2; wherein the control circuit element is a water pump drive circuit that receives a water signal and drives the operation of the pump main body; the N water level sensors in the form of electrodes spaced apart in the vertical direction are arranged one behind the other independently of one another on the pump main body, and are connected together by means of a multistage switch to the water pump drive circuit by means of a signal.

For the sensor units described in the above-described example, relatively well-known water level sensors in electrode form are selected directly among those skilled in the art. By means of differently adjustable height positions on the pump main body, the water level sensors in electrode form can measure the level of the water environment in which the pump is operated, and thus implement an automatic control of the submersible pump. At the same time, the choice of concrete water level sensor is implemented in the form of electrodes by means of a multi-stage switch. The implementation structure of the entire preferred technical concept is straightforward and the production costs are comparatively low.

According to the invention, the at least two sensor units comprise N series resistive resistors and N + 1 conductive electrodes, the N resistors and N + 1 conductive electrodes being spaced apart and N≥2; the control circuit element is an integrated chip that controls the turning on and off of the pump main body according to the total resistance value of the series branches of the N resistors; the series branches of the N resistors with the integrated chip make a signal connection, and form a circuit, and the integrated circuit further a multi-stage switch is electrically connected, which is used to set the resistance value, with which the integrated circuit controls the switching on and off of the pump main body ,

The above-described control circuit element is an integrated chip which controls, in accordance with the total resistance value of the series branches of the N resistors, the turn-on and turn-off of the pump main body; wherein by means of the change in the total resistance value at the series branch of the N resistors, the immediate switching on and off or a delayed switching on and off of the Can control pump main body.

In the preferred embodiment of the present invention described above, the at least two sensor units refer to N series resistive N resistors and N + 1 conductive electrodes, the N resistors and N + 1 conductive electrodes being respectively spaced, and the two ends of the resistors a pair of conductive electrodes each protrude on the series branches, as soon as the conductive pair of electrodes corresponding to each resistor is immersed in the water environment in which the submersible pump is operated, a short circuit can be obtained in the resistor corresponding to the electrodes, which changes the total resistance across the entire series branches generated. Therefore, the embodiment described above can give a feedback to the integrated chip in a concrete change in the level height during operation of the submersible pump in the water environment by means of a change in the total resistance value of the series branches on the submersible pump. The user can use the multistage switch to preset the resistance value for the automatic switching on and off of the submersible pump provided in the present application, if a change occurs at the level of the submersible pump environment, controls as soon as the actual total resistance value of the oak branch reaches or falls below the set resistance value Control circuit unit, the operating recording of the submersible pump, otherwise the pump then stops the operation. The entire preferred technical concept does not concern any electronic sensor elements, which lowers the manufacturing costs sufficiently.

In the submersible pump obtained with the present invention, the structure of the sensor unit on the pump main body is uncomplicated and the operational stability is high; At the same time, there are a number of advantages, such as comparatively low production costs and good economy.

Description of the attached figures

• FIG. 1 Fig. 13 is a construction diagram of a submersible pump provided in Embodiment 1;
• FIG. 2 is a schematic diagram of an embodiment 1 provided Submersible pumps;
• FIG. 3 Fig. 11 is a construction diagram of a submersible pump provided in Embodiment 2;
• FIG. 4 is a schematic diagram of a submersible pump provided according to Embodiment 2;
• FIG. 5 is a circuit diagram of a submersible pump provided in accordance with Embodiment 2;

In the figures, pump main body 1, sensor unit 2, multistage switch 3, control circuit element 4, upper conductive electrode 5, middle conductive electrode 6, first common conductive electrode 7, second common conductive electrode 8, water pump electric motor 9.

embodiments

Below, the figures and embodiments will be further described in combination.

Embodiment 1

As in FIG. 1 and FIG. 2 2, the submersible pump according to the present invention comprises a pump main body 1, a sensor unit 2 is disposed on the pump housing of the pump main body 1, the sensor unit 2 consists of three water level sensors in electrode form A, B, C, the three water level sensors in electrode form are spaced one behind the other in the vertical direction arranged in a row, and there is a fixed height difference between them; the control circuit element 4 of the pump main body 1 is a simple water pump drive circuit receiving a water signal; the three water level sensors in electrode form A, B, C are connected together by means of a four-stage multi-stage switch 3 with a water pump drive circuit acting as a control circuit element 4 of the water pump by signal.

During operation, the above-described multi-stage switch 3 determines as preselection that any one of the three water level sensors in the electrode form A, B, C is operated, for example, it is determined that the water level sensor in Electrode form A is operated when the level of the water environment in which the submersible pump is operated via the above-described level sensor in electrode A increases so that the water level sensor in electrode form A completely immersed in the liquid, and has the above-described water pump drive circuit from the water level sensor in Electrode form A receives the signal that water is present, the control that the water pump electric motor 9 in the pump main body 1 is put into operation and this operating state is maintained until the level drops below the above-described level sensor in electrode shape A. At the same time, at the water level sensor in electrode form, the signal that water is present goes out immediately, so that the water pump drive circuit can control that the water pump electric motor 9 of the pump main body 1 stops operation immediately.

Embodiment 2:

As in the Figures 3-5 3, the submersible pump according to the present invention comprises a pump main body 1, three series-resistor-maintaining resistors R ₂ , R ₆ , R _7, and four conductive electrodes are disposed on the pump housing of the pump main body 1, the four conductive electrodes each having the upper conductive electrode 5, the middle conductive electrode 6, the first common conductive electrode 7 and the second common conductive electrode 8, while the above-described three resistors R ₂ , R ₆ , R ₇ are spaced apart with the four conductive electrodes, more specifically R ₂ between the upper conductive electrode 5 and the middle conductive electrode 6, R ₆ is located between the middle conductive electrode 6 and the first common conductive electrode 7, and R ₇ is located between the first common conductive electrode 7 and the second common conductive Electrode 8, de The resistance of the resistor R ₂ described above is 100 KΩ, the resistance value of R ₆ is also 100 KΩ, but the resistance value of R ₇ is 300 KΩ; the control circuit element 4 of the pump main body 1 described above is constituted by a U ₂ chip model SMD_CPU_RSF211B4 and its peripheral circuit; the series branches of the three resistors R ₂ , R ₆ , R ₇ described above are coupled to the SENSOR pin of the U ₂ chip by means of a cable interface J _{2 of} the model P_2P_2MM54_180; there is one Multi-level switch KEY, with which the RESET pin of the U ₂ chip described above is coupled together with the MODE pin, on the multi-stage switch KEY, a 500 KΩ switch position and a 400 KΩ switch position are displayed.

During operation, the 500 KΩ switch position (high water level switch position) or 400 KΩ switch position (middle water level switch position) is selected on the KEY multi-level switch described above; when the high water level switch position is selected on the multi-stage switch KEY, the water pump turns on when the U ₂ chip measures that the total resistance value of the series branches of the three resistors R ₂ , R ₆ , R ₇ immersed in the liquid reaches or exceeds 500 KΩ (high water level), the water pump electric motor 9 of the pump main body 1 operates when the U ₂ chip measures that the total resistance value of the liquid immersed series branches of the above-described three resistors R ₂ , R ₆ , R _{7 is} 300 KΩ falls below (low water level), the water pump electric motor 9 of the water pump turns off; Similarly, if the average water level switch position is selected on the multi-stage switch KEY, the water pump turns on when the U ₂ chip measures that the total resistance value of the series branches of the above-described three resistors R ₂ , R ₆ , R ₇ 400 KΩ immersed in the liquid reaches or exceeds (high water level), the water pump electric motor 9 of the pump main body 1 operates when the U ₂ chip measures that the total resistance value of the liquid immersed series branches of the above-described three resistors R ₂ , R ₆ , R ₇ 300 KΩ falls below (low water level), the water pump electric motor 9 of the water pump turns off.

The U ₂ chip of the SMD_CPU_RSF211B4 model described above and its peripheral circuit represent a control technology integrating and widely used in the art chip model that can be purchased directly by professionals, the concrete use is still a corresponding control programming necessary, this element control programming is part of the general knowledge by technical experts of the relevant field, by means of computer language, these technical experts of the relevant field can create them directly, and since there are different options in computer language and programmers pursue different subjective strategies, there is by no means a single form of control programming. In summary, it can be say that neither the U ₂ chip model SMD_CPU_RSF211 B4 according to the present application nor the content of its control programming content of the protection claim of the present application.

Claims (1)

1. Submersible pump including a pump main body (1) and a water level switch, wherein the water level switch includes substantially at least two sensor units (2) arranged lined up at the pump main body (1) spaced in perpendicular direction and all sufficiently contacted by the water as well as a control circuit unit, which controls turning on and turning off the pump main body (1) by means of receiving a water signal emitted by any sensor unit (2);
   characterized in that
   the at least two sensor units (2) include N resistors of a series connection structure as well as N+1 conductive electrodes, wherein the N resistors and N+1 conductive electrodes are each distributed at distance and N≥2; the control circuit element (4) is an integrated chip, which controls turning on and turning off the pump main body (1) according to the overall resistance of the series branches of the N resistors; the series branches of the N resistors perform a signal correlation with the integrated chip and constitute an electric circuit, and a multi-stage switch (3) is further electrically connected to the integrated circuit, which is used to adjust the resistance, by which the integrated circuit controls turning on and turning off the pump main body (1).

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