CN211144839U

CN211144839U - Compact submersible pump with water shortage protection function

Info

Publication number: CN211144839U
Application number: CN201922013668.0U
Authority: CN
Inventors: 熊明汉
Original assignee: Shenzhen Chenzhou Electrical Appliance Co ltd
Current assignee: Shenzhen Chenzhou Electrical Appliance Co ltd
Priority date: 2019-11-20
Filing date: 2019-11-20
Publication date: 2020-07-31
Anticipated expiration: 2029-11-20

Abstract

The utility model relates to a compact submersible pump with water shortage protection function, which comprises a submersible pump body; the compact submersible pump also comprises a circuit board and a non-contact liquid level detection assembly; the non-contact liquid level detection assembly comprises a capacitance detection chip and a conducting strip; the capacitance detection chip and the submersible pump body are electrically connected with and controlled by the circuit board; the submersible pump body comprises a pump shell; the pump shell is provided with a first chamber and a second chamber; the first chamber comprises a centrifugal cavity communicated with the liquid inlet pipe and a rotor accommodating cavity communicated with the centrifugal cavity; the pump shell is also provided with a water inlet and a water outlet which are communicated with the centrifugal cavity; the second chamber is a sealed chamber; a stator, a non-contact liquid level detection assembly and a circuit board are arranged in the second chamber; the conducting plate is fixed with the inner wall of the second cavity; this compact immersible pump can avoid the long-time water shortage operation of immersible pump body, in addition, also avoids the conducting strip to be covered by the incrustation scale or by the condition of pump sending liquid corruption, and life is longer.

Description

Compact submersible pump with water shortage protection function

Technical Field

The utility model relates to a immersible pump technical field, more specifically say, relate to a take compact immersible pump of lack of water protect function.

Background

The existing water pump, especially the submersible pump, is not allowed to run in short of water for a long time. Therefore, in the case of high requirements, a water shortage protection device is added. Most of the water shortage protection devices are installed in the water tank and separated from the water pump, and the mode is troublesome to install and needs to occupy more space; and a small part of the water pump is internally provided with a controller, and the water level is sensed by a probe arranged outside the water pump shell, so that the probe is easily influenced by scale, and the failure is caused.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model lies in, to the above-mentioned defect of prior art, a take compact immersible pump of lack of water protect function is provided.

The utility model provides a technical scheme that its technical problem adopted is:

the compact submersible pump with the water shortage protection function is constructed and comprises a submersible pump body; the compact submersible pump further comprises a circuit board and a non-contact liquid level detection assembly for detecting the immersion depth of the submersible pump body when liquid is pumped; the non-contact liquid level detection assembly comprises a capacitance detection chip fixedly arranged on the circuit board and a conducting strip electrically connected with the capacitance detection chip; the capacitance detection chip and the submersible pump body are electrically connected with and controlled by the circuit board;

the submersible pump body comprises a pump shell; the pump shell is provided with a first chamber and a second chamber; the first chamber comprises a centrifugal cavity communicated with the liquid inlet pipe and a rotor accommodating cavity communicated with the centrifugal cavity; the pump shell is also provided with a water inlet and a water outlet which are communicated with the centrifugal cavity; the second chamber is a sealed cavity; a stator, the non-contact liquid level detection assembly and the circuit board are arranged in the second chamber; the conducting strip is fixed with the inner wall of the second cavity.

Preferably, the pump shell comprises a main shell, a front shell and a rear shell, wherein openings are formed in two ends of the main shell, the front shell is tightly covered with one end of the main shell in a matched mode, and the rear shell is tightly covered with the other end of the main shell in a matched mode; the first chamber and the water outlet are both arranged on the main shell; the water inlet is arranged on the front shell; the rear shell and the main shell are matched to enclose the second chamber.

Preferably, the main housing comprises an outer sleeve and an inner mounting; the water outlet is arranged on the outer sleeve; the outer sleeve and the inner mounting frame are matched to enclose the first cavity;

the inner mounting frame comprises a fixed seat, a first mounting column and a second mounting column which are arranged in sequence; the fixed seat is fixed with the inner wall of the outer sleeve; the outer diameter of the first mounting column is larger than that of the second mounting column; the stator is sleeved on the second mounting column; the circuit board is annular and is sleeved on the first mounting column.

Preferably, the conductive plate is fixed on the side of the rear shell facing the main shell.

Preferably, an elastic block is arranged at one end of the main shell, which is fixed with the rear shell; the rear shell is C-shaped, and the end legs are provided with convex blocks which tightly abut against the elastic blocks.

Preferably, a waterproof rubber ring for extruding the main shell is further arranged in the rear shell.

The beneficial effects of the utility model reside in that: the during operation, conducting strip and control panel are all in the second cavity, with the pump case outside by the pump sending liquid be keeping apart, and simultaneously, the conducting strip is closely laminated with the inner wall of second cavity, play the effect of capacitive touch key, whether the inductive capacitance who utilizes water detects there is liquid to exist, promptly the immersible pump body immerses by the pump sending liquid after, the parasitic capacitance of liquid will couple to on the static capacitance of this conducting strip, make ultimate capacitance value can the grow, the capacitance value is obtained in real time to the capacitance detection chip, when the capacitance value that obtains is less than predetermineeing the threshold value, explain present immersion depth undersize, the capacitance detection chip sends shutdown signal to the circuit board, thereby control immersible pump body stop work, avoid long-time lack of water operation. In addition, as the conducting strip is not in direct contact with the pumped liquid, the situation of being covered by scale or corroded by the pumped liquid is avoided, and the service life is longer.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the present invention will be further described below with reference to the accompanying drawings and embodiments, wherein the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained without inventive work according to the drawings:

fig. 1 is a schematic view of the internal structure of a compact submersible pump with a water shortage protection function according to a preferred embodiment of the present invention;

fig. 2 is an enlarged view at a in fig. 1.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, a clear and complete description will be given below with reference to the technical solutions of the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts belong to the protection scope of the present invention.

The compact submersible pump with the water shortage protection function of the preferred embodiment of the utility model is shown in fig. 1 and fig. 2 and comprises a submersible pump body; the compact submersible pump also comprises a circuit board 3 and a non-contact liquid level detection assembly for detecting the immersion depth of the submersible pump body when liquid is pumped; the non-contact liquid level detection assembly comprises a capacitance detection chip (not shown in the figure) fixedly arranged on the circuit board 3 and a conducting strip 2 electrically connected with the capacitance detection chip (not shown in the figure); the capacitance detection chip and the submersible pump body are electrically connected with and controlled by the circuit board 3;

the submersible pump body comprises a pump shell 10; the pump housing 10 is provided with a first chamber 180 and a second chamber 181; the first chamber 180 comprises a centrifugal cavity 182 communicated with a liquid inlet pipe (not shown in the figure), and a rotor accommodating cavity 183 communicated with the centrifugal cavity 182; the pump shell 10 is also provided with a water inlet 184 and a water outlet which are both communicated with the centrifugal cavity 182; the second chamber 181 is a sealed chamber; a stator 11, a non-contact liquid level detection assembly and a circuit board 3 are arranged in the second chamber 181; conducting strip 2 is fixed with second cavity 181 inner wall, in operation, conducting strip 2 and control panel 3 are in second cavity 181, with pump case 10 outer by the pump sending liquid be isolated, simultaneously, conducting strip 2 is closely laminated with the inner wall of second cavity 181, play the effect of capacitive touch key, the inductive capacitance who utilizes water detects whether there is liquid to exist, promptly immerse the immersible pump body by the pump sending liquid after, the parasitic capacitance of liquid will couple to on this conducting strip 2's static capacitance, make ultimate capacitance value can grow, capacitance detection chip acquires the capacitance value in real time, when the capacitance value that acquires is less than predetermineeing the threshold value, demonstrate current immersion depth undersize, capacitance detection chip sends shut down signal to circuit board 3, thereby control immersible pump body stop work, avoid long-time lack of water operation. In addition, as the conducting strip 2 is not in direct contact with the pumped liquid, the situation of being covered by scale or corroded by the pumped liquid is avoided, and the service life is longer.

Note that the conductive sheet 2 includes, but is not limited to, a copper sheet and a copper foil.

In the preferred embodiment of the present invention, the pump casing 10 includes a main casing 12 with openings at both ends, a front casing 13 tightly covering one end of the main casing 12, and a rear casing 14 tightly covering the other end of the main casing 12; the first chamber 180 and the water outlet are both disposed on the main housing 12; the water inlet 184 is arranged on the front shell 13; the rear housing 14 and the main housing 12 cooperate to define a second chamber 181, dividing the pump housing 10 into three parts, reducing the processing difficulty and facilitating the assembly of the impeller, the rotor, the rotating shaft and the stator. In order to maintain the second chamber 181 in a sealed state, the main housing 12 and the rear housing 14 may be fixed by welding or bonding.

In the preferred embodiment of the present invention, the main housing 12 includes an outer sleeve 15 and an inner mounting frame 16; the water outlet is arranged on the outer sleeve 15; the outer sleeve 15 and the inner mounting bracket 16 cooperate to define a first chamber 180;

the inner mounting frame 16 comprises a fixed seat 17, a first mounting column 18 and a second mounting column 19 which are arranged in sequence; the fixed seat 17 is fixed with the inner wall of the outer sleeve 15; the outer diameter of the first mounting post 18 is greater than the outer diameter of the second mounting post 19; the stator 11 is sleeved on the second mounting column 19; the circuit board 3 is annular and is sleeved on the first mounting column 18, so that the circuit board is convenient to mount and has a good positioning effect.

In the preferred embodiment of the present invention, the conductive plate 2 is fixed on the side of the rear housing 14 facing the main housing 12, and the rear housing 14 is made of a non-conductive material.

In the preferred embodiment of the present invention, an elastic block 110 is disposed at one end of the main housing 12 fixed to the rear housing 14; the rear shell 14 is C-shaped, and the end leg is provided with a protrusion 111 abutting against the elastic block 110, the rear shell 14 is sleeved on the main shell 12, the protrusion 111 and the elastic block 110 are mutually extruded, so that the rear shell 14 and the main shell 12 are more tightly attached, and after the rear shell 14 is bonded with the main shell 12, the sealing performance of the second chamber 181 is better.

In the preferred embodiment of the present invention, a waterproof rubber ring 112 is further disposed in the rear housing 14 for pressing the main housing 12, so as to further ensure that the second chamber 181 is in a sealed state.

It will be understood that modifications and variations can be made by persons skilled in the art in light of the above teachings and all such modifications and variations are considered to be within the scope of the invention as defined by the following claims.

Claims

1. A compact submersible pump with a water shortage protection function comprises a submersible pump body; the compact submersible pump is characterized by further comprising a circuit board and a non-contact liquid level detection assembly for detecting the immersion depth of the submersible pump body when liquid is pumped; the non-contact liquid level detection assembly comprises a capacitance detection chip fixedly arranged on the circuit board and a conducting strip electrically connected with the capacitance detection chip; the capacitance detection chip and the submersible pump body are electrically connected with and controlled by the circuit board;

2. The compact submersible pump of claim 1, wherein the pump housing comprises a main housing with openings at both ends, a front housing closely fitted to one end of the main housing, and a rear housing closely fitted to the other end of the main housing; the first chamber and the water outlet are both arranged on the main shell; the water inlet is arranged on the front shell; the rear shell and the main shell are matched to enclose the second chamber.

3. The compact submersible pump of claim 2, wherein the main housing comprises an outer sleeve and an inner mounting bracket; the water outlet is arranged on the outer sleeve; the outer sleeve and the inner mounting frame are matched to enclose the first cavity;

4. The compact submersible pump of claim 2, wherein the conductive tab is secured to a side of the rear housing facing the main housing.

5. The compact submersible pump of claim 2, wherein the end of the main housing to which the rear housing is fixed is provided with an elastic block; the rear shell is C-shaped, and the end legs are provided with convex blocks which tightly abut against the elastic blocks.

6. The compact submersible pump of claim 2, wherein a waterproof rubber ring is further disposed within the rear housing for compression by the main housing.