CN218733198U

CN218733198U - Cleaning machine controller with leakage protection detection function

Info

Publication number: CN218733198U
Application number: CN202221899387.5U
Authority: CN
Inventors: 郑诚; 蒋剑剑; 朱碧菡; 沈舒婷; 聂军峰; 刘志波; 闫占凯; 蒋诚宇
Original assignee: Shijiazhuang Liangbao Technology Co ltd
Current assignee: Shijiazhuang Liangbao Technology Co ltd
Priority date: 2022-07-21
Filing date: 2022-07-21
Publication date: 2023-03-24
Anticipated expiration: 2032-07-21

Abstract

The utility model discloses a cleaning machine controller with earth leakage protection detects function to solve the problem that the user can't know whether the earth leakage protection function became invalid, has the potential safety hazard. The utility model is based on the existing leakage protection detection system, a controllable active leakage circuit is added, which is independent of the original leakage signal acquisition unit, and is connected to the power supply loop as a bypass, and a user leakage protection test button is correspondingly added on the control panel; when a user presses a leakage protection test button, the test switch is closed, the leakage signal acquisition unit detects that the power supply loop generates leakage, if the leakage protection indicator lamp and the power switch respond, the leakage protection function is normal, otherwise, the leakage protection function is invalid; therefore, the safety of the electricity of the cleaning machine can be further improved.

Description

Cleaning machine controller with leakage protection detection function

Technical Field

The application relates to the technical field of electric appliance detection, in particular to a controller suitable for a high-pressure water pump cleaning machine.

Background

A high-pressure water pump cleaning machine is a machine which uses a power device to make a high-pressure plunger pump generate high-pressure water to wash the surface of an object. It can peel off and wash away dirt to clean the surface of the object. Due to the use of high pressure water jets to clean dirt, such washers are also currently recognized as the most scientific, economical, and environmentally friendly cleaning device.

For example, patent document CN211359774U discloses an intelligent high-pressure cleaning machine, which feeds water into a water outlet pump body through a water inlet pipe, and then the water is discharged from a high-pressure water outlet through a pressure regulating valve, a first check valve and a second check valve, so as to realize the effect of high-pressure cleaning; in addition, still set up maintenance pilot lamp, electric current overload warning light, power indicator, earth leakage protection pilot lamp etc. on this intelligence high pressure cleaner's the display panel. The basic principle of leakage protection is shown in fig. 1, a power supply loop of an electric water pump of a cleaning machine is coupled with a leakage signal acquisition unit (such as a zero sequence current transformer specifically), an output end of the leakage signal acquisition unit is connected with an input end of a leakage protection detection control circuit, an output end of the leakage protection detection control circuit is connected to a power switch (which is usually a trigger release to indirectly drive the power switch specifically) arranged on the power supply loop, and meanwhile, an output end of the leakage protection detection control circuit is also connected to a leakage protection indicator lamp on a control panel. When electric leakage occurs, the zero sequence current transformer outputs a signal to the electric leakage protection detection control circuit, so that the power switch is disconnected, and the electric leakage protection indicator lamp is lightened.

The inventor realizes that although most of the existing high-pressure water pump cleaning machine controllers have an electric leakage protection function (when electric leakage occurs, equipment power supply is cut off), if the electric leakage protection function fails due to faults, a user cannot know in time, and under the condition, the electric leakage cannot be effectively protected, and the electric leakage can cause great harm to personal and property safety.

SUMMERY OF THE UTILITY MODEL

Therefore, the application provides a cleaning machine controller with an electric leakage protection detection function to solve the problem that a user cannot know whether the electric leakage protection function is invalid or not and has potential safety hazards.

In order to achieve the above purpose, the present application provides the following technical solutions:

a cleaning machine controller with leakage protection detection function comprises a shell, a leakage protection detection control circuit arranged in the shell and a control panel arranged on the surface of the shell, wherein a power supply loop of an electric water pump of the cleaning machine is coupled with a leakage signal acquisition unit, the output end of the leakage signal acquisition unit is connected with the input end of the leakage protection detection control circuit, and the output end of the leakage protection detection control circuit is connected to a power switch arranged on the power supply loop; the prior art is different from the prior art:

the control panel is also provided with an earth leakage protection test button, the shell is also internally provided with an active earth leakage circuit, and the active earth leakage circuit comprises a simulated earth leakage load and a test switch which is connected with the simulated earth leakage load in series and corresponds to the earth leakage protection test button; the active leakage circuit is independent of the leakage signal acquisition unit and is connected to the power supply loop as a bypass; when the leakage protection test button is pressed, the test switch is closed, and at the moment, the leakage signal acquisition unit detects that the power supply loop generates leakage.

Optionally, the leakage signal acquisition unit is a leakage detection transformer, and the active leakage circuit crosses over or bypasses the leakage detection transformer and is connected to the power supply loop.

Optionally, the earth leakage protection test button is a non-self-locking normally-open button switch.

Optionally, the analog leakage load is a resistor and/or a capacitor.

Optionally, a power supply of the power supply loop is a three-phase power supply, and the whole three-phase power supply line passes through the leakage detection mutual inductor; and two ends of the series branch where the analog leakage load and the test switch are located are respectively connected to any two phases of power lines.

Optionally, the power supply of the power supply loop is a two-phase power supply or a single-phase power supply, and the two power lines of the power supply loop integrally pass through the leakage detection transformer; and two ends of the series branch where the analog leakage load and the test switch are located are respectively connected to the two power lines.

Compared with the prior art, the method has the following beneficial effects:

the leakage protection circuit is additionally provided with a controllable active leakage circuit based on the existing leakage protection detection system, is independent of an original leakage signal acquisition unit, is used as a bypass to be connected into a power supply loop, and is additionally provided with a user leakage protection test button on a control panel correspondingly; when a user presses an electric leakage protection test button, a test switch is closed, the electric leakage signal acquisition unit detects that electric leakage occurs in the power supply loop, if the power switch responds, the water pump stops running, the electric leakage protection function is normal, and otherwise, the electric leakage protection function is invalid; therefore, the safety of the electricity of the cleaning machine can be further improved.

The application has the advantages of simple structure and low implementation cost.

Drawings

To more intuitively illustrate the prior art and the present application, several exemplary drawings are given below. It should be understood that the specific shapes, configurations, shown in the drawings, are not generally considered limitations on the practice of the present application; for example, it is within the ability of those skilled in the art to make routine adjustments or further optimizations based on the technical concepts disclosed in the present application and the exemplary drawings, for the increase/decrease/attribution of certain units (components), specific shapes, positional relationships, connection manners, dimensional ratios, and the like.

Fig. 1 is a schematic diagram of the basic principle of leakage protection;

FIG. 2 is a schematic circuit diagram of an embodiment of the present application;

FIG. 3 is a schematic circuit diagram of another embodiment of the present application;

fig. 4 is a schematic view of a control panel (partial) in one embodiment of the present application.

The reference numbers illustrate:

1. an electric water pump; 2. a power switch; 3. a leakage detection transformer; 4. a leakage protection detection control circuit; 5. a leakage protection indicator light; 6. an active leakage circuit; 601. resistance (analog leakage load); 602. a test switch; 7. leakage protection test button.

Detailed Description

The present application will be described in further detail below with reference to specific embodiments thereof, with reference to the accompanying drawings.

In an embodiment, a cleaning machine controller with leakage protection detection function is provided, as shown in fig. 2, fig. 3 and fig. 4, a power supply loop of an electric water pump 1 of the cleaning machine is coupled with a leakage detection mutual inductor 3, the cleaning machine controller is connected into the power supply loop of the electric water pump 1, wherein the inside of a controller shell is not only provided with the leakage protection detection control circuit 4, but also is provided with an active leakage circuit 6, an output end of the leakage detection mutual inductor 3 is connected with an input end of the leakage protection detection control circuit 4, an output end of the leakage protection detection control circuit 4 is respectively connected to a leakage protection indicator lamp 5 on a control panel and a power switch 2 arranged on the power supply loop, and the control panel is further provided with a leakage protection test button 7.

The active leakage circuit 6 includes a simulated leakage load and a test switch 602 connected in series with the simulated leakage load and corresponding to the leakage protection test button (the test switch 602 and the leakage protection test button 7 may also be considered as the same component); the active leakage circuit 6 is independent of the leakage signal acquisition unit, is used as a bypass to be connected into a power supply loop, and can specifically cross or bypass the leakage detection transformer 3 to be connected into the power supply loop; when the leakage protection test button is pressed, the test switch 602 is closed, and at this time, the leakage signal acquisition unit detects that leakage occurs in the power supply loop.

The power supply of electric water pump can be single phase power supply (a live wire, a zero line), also can be three phase current (three-phase four-wire), also can be two-phase power supply (two live wires), for example:

when the power supply of the power supply loop is a three-phase power supply, the whole three-phase power line passes through the leakage detection mutual inductor 3; the two ends of the series branch circuit where the analog leakage load and the test switch are located are respectively connected to any two phases of power lines. As shown in fig. 2, an active leakage circuit 6 (a series branch where a resistor and a test switch are located) crosses over the leakage detection transformer 3 to be connected to the power supply loop, and one end of the active leakage circuit is connected to phase a, and the other end of the active leakage circuit is connected to phase B.

When the power supply of the power supply loop is a two-phase power supply or a single-phase power supply, the two power lines of the power supply loop integrally pass through the electric leakage detection mutual inductor; the two ends of the series branch circuit where the analog leakage load and the test switch are located are respectively connected to the two power lines. Taking the case of the two-phase power supply shown in fig. 3 as an example, the active leakage circuit 6 (a serial branch where the resistor and the test switch are located) is connected to the power supply loop around the leakage detection transformer 3, and both ends of the active leakage circuit are respectively connected to two power lines, which may be located on the same side of the leakage detection transformer 3.

It should be understood that in the present application, the association of the active leakage circuit 6 with the leakage detecting transformer 3, whether crossing or passing, and specifically winding one or more turns, is feasible (both capable of causing a change in the input and output signals of the leakage detecting transformer 3 in the event of active leakage).

In this application, the specific implementation form of the leakage signal acquisition unit is not limited (not limited to the leakage detection transformer 3), as long as the leakage signal acquisition unit has the function of sensing/detecting the leakage condition.

The leakage protection test button is preferably a non-self-locking normally open button switch (pressed to be connected and released to be disconnected).

The specific type of the analog leakage load is not limited, and the power supply is an alternating current, and therefore, the analog leakage load may be a resistor (impedance), a capacitor (capacitive reactance), an RC circuit unit, or the like. For example, a 7.5K Ω resistor may be selected as the analog leakage load.

The embodiment is based on the existing leakage protection detection system, a controllable active leakage circuit is added, the controllable active leakage circuit is independent of the original leakage signal acquisition unit, and is used as a bypass to be connected into a power supply loop, and a user leakage protection test button is correspondingly added on a control panel; when a user presses a leakage protection test button, a test switch is closed (which is equivalent to the situation of simulating human body electric shock), at the moment, a leakage signal acquisition unit detects that the power supply loop generates leakage, if the power switch responds, the water pump stops running, the leakage protection function is normal, otherwise, the leakage protection function is invalid; therefore, the safety of the electricity consumption of the cleaning machine can be further improved.

For a controller or a signal box provided with an electric leakage protection indicating unit such as an electric leakage protection indicating lamp and/or a buzzer, whether a response is given can be judged more intuitively, and whether the electric leakage protection function is normal or not can be further judged.

The present application has been described in considerable detail with reference to certain embodiments and examples thereof. It should be understood that several conventional adaptations or further innovations of these specific embodiments may also be made based on the technical idea of the present application; however, such conventional modifications and further innovations may also fall within the scope of the claims of the present application as long as they do not depart from the technical idea of the present application.

Claims

1. A cleaning machine controller with leakage protection detection function comprises a shell, a leakage protection detection control circuit arranged in the shell and a control panel arranged on the surface of the shell, wherein a power supply loop of an electric water pump of the cleaning machine is coupled with a leakage signal acquisition unit, the output end of the leakage signal acquisition unit is connected with the input end of the leakage protection detection control circuit, and the output end of the leakage protection detection control circuit is connected to a power switch arranged on the power supply loop; the method is characterized in that:

the control panel is provided with an electric leakage protection test button, the shell is internally provided with an active electric leakage circuit, and the active electric leakage circuit comprises a simulation electric leakage load and a test switch which is connected with the simulation electric leakage load in series and corresponds to the electric leakage protection test button; the active leakage circuit is independent of the leakage signal acquisition unit and is connected to the power supply loop as a bypass; when the leakage protection test button is pressed, the test switch is closed, and at the moment, the leakage signal acquisition unit detects that the power supply loop generates leakage.

2. The washer controller as recited in claim 1, wherein: the leakage signal acquisition unit is a leakage detection mutual inductor, and the active leakage circuit crosses over or bypasses the leakage detection mutual inductor to be connected into the power supply loop.

3. The washer controller as recited in claim 1, wherein: the leakage protection test button is a non-self-locking normally-open button switch.

4. The washer controller as recited in claim 1, wherein: the analog leakage load is a resistor and/or a capacitor.

5. The washer controller as recited in claim 2, wherein: the power supply of the power supply loop is a three-phase power supply, and the whole three-phase power supply line passes through the electric leakage detection mutual inductor; and two ends of the series branch where the simulated leakage load and the test switch are located are respectively connected to any two phases of power lines.

6. The washer controller as recited in claim 2, wherein: the power supply of the power supply loop is a two-phase power supply or a single-phase power supply, and two power lines of the power supply loop integrally pass through the electric leakage detection mutual inductor; and two ends of the series branch where the analog leakage load and the test switch are located are respectively connected to the two power lines.