CN2762412Y

CN2762412Y - Universal shockproof wall device for surfing bathtube controlled by one-chip machine

Info

Publication number: CN2762412Y
Application number: CN 200420073545
Authority: CN
Inventors: 谭启仁
Original assignee: Individual
Current assignee: Individual
Priority date: 2004-07-07
Filing date: 2004-07-07
Publication date: 2006-03-01
Anticipated expiration: 2014-07-07

Abstract

The utility model discloses a universal electric proof wall device for a surfing bathtub controlled by a single-chip machine, which belongs to the technical application field of the single-chip microcomputer), particularly to electric proof wall technique which can protect the personal safety when an earth wire of the surfing bath tub and the basic insulation are ineffective simultaneously. The utility model is formed by electrically connecting a potential difference detection device of a zero line and an earth wire, a central processing unit and a relay execution circuit in turn. The utility model is mainly characterized in that a transformer or a capacitance-resisting voltage reducing circuit is connected between the earth wire and the zero line, and is connected with an I / O input port of the single-chip microcomputer through a switch tube. The single-chip microcomputer receives voltage difference signals between the zero line and the earth wire, and the power supplies of the earth wire and the surfing bathtub is cut off in real time when the earth wire is electrified. The utility model is suitable for various control modes of various surfing bathtubs. The utility model relates to the electric proof wall technique which aims to protect the personal safety under the environment that the earth connection is unreliable or the earth wire is ineffective.

Description

The electricity-preventing wall device that monolithic processor controlled Trend bathtub is general

Anti-electric wall technology when technical field the invention belongs to microchip technology field and is particularly related to Trend bathtub ground wire and basic insulation and lost efficacy simultaneously.

Background technology is well-known, and it must be reliably that the Trend bathtub product standard requires the ground connection in the user family, and the standard plug that the band ground wire also is housed in its product is for linking to each other good with assurance ground connection with ground wire in the socket.And in China, power utilization environment is poor, and the ground connection of many buildings is insecure, or even lack.In this case, qualified Trend bathtub can not guarantee user's safety.The anti-electric wall technology that the invention relates to is special in China's actual conditions, is intended to guarantee under unsafe power utilization environment user's safety.And before the invention applying date, Trend bathtub does not have the personal safety protector that cut off ground wire and Trend bathtub power supply when ground wire and basic insulation lost efficacy simultaneously in real time, brings potential safety hazard for the user who does not have good earth.

The purpose of summary of the invention the invention is exactly to overcome the shortcoming that the above-mentioned prior art of Trend bathtub exists, providing a kind of had when this Trend bathtub ground wire and basic insulation lost efficacy simultaneously, can cut off the power supply of ground wire and Trend bathtub in real time, even under dangerous power utilization environment, also can guarantee user's safety.The relay circuit of the invention guarantees that simultaneously Trend bathtub recovers or do not influence normal use when ground wire is not charged.

The invention solves the technical scheme that its technical problem adopts: the invention is provided with cross-over connection in ground wire E _INAnd the potential difference detecting device between zero line N (1), this device provides ground wire normal or charged logical signal to central processing unit (2) I/O input port, and central processing unit (2) is by the break-make of I/O output port control relay executive circuit.Relay executive circuit (3) is by drive circuit Q ₁, Q ₂And relay J ₁, J ₂Form, be serially connected with ground wire E respectively at its normally-closed contact, normally opened contact _IN, E _OUTAnd Trend bathtub power supply L _IN, L _OUTRelay executive circuit (3) is controlled by central processing unit (2), cuts off being serially connected in relay J when ground wire electrification ₁, J ₂Ground wire and Trend bathtub power supply.Under normal circumstances, the relay normally-closed contact is guaranteed ground wire E _IN,, E _OUTAnd Trend bathtub power supply L _IN, L _OUTConnection.

The advantage of the invention is simple in structure, and highly versatile is suitable for all kinds of Trend bathtubs and installs, and effect is obvious, does not influence the use under the ground wire normal condition, its central processing unit also can with Trend bathtub single chip machine controlling circuit shared resource.

Description of drawings Fig. 1 is the circuit structure block diagram of the invention.Wherein (1) is that zero grounding potential difference detector set (2) is central processing unit, and (3) are the relay executive circuit.

Fig. 2 is the electrical schematic diagram of the invention.E among the figure _INBe ground wire end of incoming cables, E _OUTBe the ground wire leading-out terminal, promptly link to each other with the Trend bathtub earth terminal; L _INBe live wire end of incoming cables, L _OUTBe the live wire leading-out terminal, promptly link to each other with Trend bathtub live wire end; N is a zero line, and 12V is the 12V DC power supply.

Embodiment the invention embodiment central processing unit adopts PIC16C54 (PIC16C57) chip microprocessor able to programme, and as previously mentioned, this chip microprocessor can be shared with the single chip machine controlling circuit of Trend bathtub.Cross-over connection is in zero line N and ground wire E _INBetween potential difference detecting device by transformer T or resistance-capacitance circuit R ₁C ₁(among Fig. 2 shown in the dotted line) step-down, D ₁～D ₄Diode rectification, capacitor C ₀, voltage-stabiliser tube the DW voltage stabilizing circuit and the switching tube Q that form ₀Form switching tube Q ₀Be connected in central processing unit I/O input port, I/O output port control relay executive circuit Q ₁, Q ₂, J ₁, J ₂The relay normally-closed contact connects ground wire E _INAnd E _OUT, normally opened contact connects Trend bathtub L _INAnd L _OUT

Operation principle summary: Trend bathtub under the situation that ground connection and basic insulation lost efficacy simultaneously, zero line N and ground wire E _INBetween voltage between 36V-220V, cross-over connection is in zero line N and ground wire E _INOn transformer reduction voltage circuit or resistance-capacitance depressurization circuit produce the 1.5-6V dc pulse voltage by rectification circuit, make switching tube Q ₀Conducting is to central processing unit output low level signal.Q in the relay executive circuit ₁, Q ₂Be respectively J ₁, J ₂Drive circuit.When the I/O output makes Q ₁Or Q ₂During for low level, the actuating of relay disconnects the ground wire E that is connected on its normally-closed contact _INAnd E _OUTAnd the L of normally opened contact (being normally-closed contact during work) _INAnd L _OUT

Claims

1, the general electricity-preventing wall device of a kind of monolithic processor controlled Trend bathtub comprises potential difference detecting device, central processing unit and relay executive circuit; It is characterized in that the potential difference detecting device cross-over connection between ground wire and zero line, and be connected that single-chip microcomputer central processing unit I/O output port is connected with the relay executive circuit with single-chip microcomputer central processing unit I/O input port.

2, the general electricity-preventing wall device of monolithic processor controlled Trend bathtub according to claim 1, it is characterized in that the potential difference detecting device of cross-over connection between ground wire and zero line is by transformer or resistance-capacitance circuit step-down, diode rectification, electric capacity, voltage-stabiliser tube and switching tube are formed, and the switching tube output is connected with single-chip microcomputer central processing unit I/O input port.

3, the general electricity-preventing wall device of monolithic processor controlled Trend bathtub according to claim 1, it is characterized in that the single-chip microcomputer central processing unit is a programmable microprocessor, its I/O port is connected with the relay executive circuit with potential difference detecting device respectively, switching tube is controlled by the I/O output port of central processing unit in the described relay executive circuit, relay is controlled by switching tube, and control connection is in the break-make of the ground wire and the heating unit power of relay respectively.

4, the general electricity-preventing wall device of monolithic processor controlled Trend bathtub according to claim 1, it is characterized in that central processing unit can with the central processing unit shared resource in the Trend bathtub control circuit.