CN1888717A - Ground wire live monitoring display water heater - Google Patents

Abstract

A ground wire charged monitoring display water heater includes a shell, an inner tank, a water inlet and outlet pipe, a water inlet liner and a water outlet liner, the water inlet liner is an insulating pipe, and the water inlet of the water inlet liner and the water outlet liner are connected to the The length L of the water outlet satisfies L>53r ² (r is the radius of the inner hole of the water inlet and outlet pipes). The water heater is fixed or connected to the wall through the external hanger, and the inner tank of the water heater is insulated from the outer shell and the outer hanger. The body is connected by a wire to an indicator light composed of a series connection of neon bulbs and protective impedance; or to make a good conductive connection between the shell, external rack, and wall-mounted bolts, and connect the indicator light formed by series connection of neon bulbs and protective impedance. Between the gall and the shell. When the ground line is live, the indicator light is on, which can display the alarm in time and help to find the reverse leakage in time. Therefore, the water heater can not only ensure the safety of the bathing environment, but also has the function of alarming the whole family's live line.

Description

Ground wire live monitoring shows water heater

technical field

The invention relates to an electric water heater, in particular to an electric water heater capable of displaying that the ground wire is electrified.

Background technique

The safety of home appliances has always been a hot spot that people pay attention to. As a special electrical product, water heaters are even more important. Because once the water heater leaks electricity, it will directly endanger people's life safety. Haier Group Corporation proposed a shock-proof electric water heater in the ZL01135300.7 patent. By increasing the length of the water outlet path and increasing the resistance, even if the water heater leaks and the water in the water heater is electrified, the outlet water voltage can be lower than the safe voltage ( 36V), it can be said that this scheme has solved the bathing safety problem when the water heater leaks electricity. However, there are potential safety hazards in water heater leakage after all. Therefore, while ensuring the safety of users for bathing, users should also be reminded. For electrical appliances with grounding wires, leakage of electrical appliances will inevitably lead to electrification of the grounding wire, so monitoring whether the grounding wire is electrified can determine whether the electrical appliance is leaking electricity. But there is another situation that causes the ground wire to be electrified, that is, the so-called "reverse leakage". When other electrical appliances leak electricity and cause the ground wire to be electrified, the current enters the water heater from the common ground wire in reverse, causing the water heater ground wire to be electrified. Moreover, the above-mentioned situation of reverse leakage will not only cause the water heater to be electrified, but may also endanger the safe use of other electrical appliances in the whole family. The technical scheme of the existing ground wire live monitoring and display products on the market is to connect the indicator light between the external water pipe and the inner tank, and require the external water pipe and the shower head to be metal bodies. The water inlet and outlet pipes connected to the inner tank are connected with the external water pipe through a section of insulating pipe fittings. When the inner tank is electrified, the electricity will form a circuit between the inner tank indicator light and the outer metal pipe, and the indicator light will light up. However, in the current new buildings, the external pipe fittings are all insulating pipes, which cannot meet the installation requirements. In the prior art, even if the indicator light is connected between the inner tank of the water heater and the wall, there are still defects, because when the electrical appliance leaks, the current enters the wall from the inner tank through the indicator light, and the indicator light is on. When the potential is high, although the water heater does not leak electricity, it will also cause the indicator light to be on, so it is easy to cause misjudgment.

Contents of the invention

The purpose of the present invention is to overcome the above-mentioned defects, and provide a water heater for monitoring and displaying the live wire. The water heater can not only ensure the safety of the bathing environment, but also display an alarm in time when the ground wire is charged, and can distinguish whether it is electrical leakage or non-dangerous induction. It is helpful to detect reverse leakage in time, and has the function of alarm prompting the whole family's ground wire to be live.

In order to achieve the above object, the present invention adopts the following technical solutions: a water heater for monitoring and displaying ground wire electrification, including a shell, an inner tank, a water inlet and outlet pipe, a water inlet liner and a water outlet liner, the water inlet liner is an insulating pipe, The length L from the water inlet to the water outlet of the water inlet liner and the water outlet liner satisfies L > 53r ² (r is the radius of the inner hole of the water inlet and outlet pipes), and the water heater is fixed or connected to the wall through an external hanger, which is characterized in that: The outer shell of the water heater is insulated from the inner tank, the external hanger is insulated from the inner tank, and the inner tank and the wall are connected by wires to an indicator light composed of a neon bulb and a protective impedance connected in series.

When the water heater leakage causes the inner tank to be electrified (the ground wire is suspended in the air and is not connected to the earth), the electricity will be guided into the wall and enter the earth through the indicator light, and the indicator light will be on to remind the user of the water heater leakage and timely repair.

When other electrical appliances leak electricity and cause the ground wire to be charged, if the public ground wire is not reliably grounded, the current will reversely enter the inner tank of the water heater from the public ground wire or the ground wire of the water heater. At this time, electricity will enter the wall and the ground through the indicator light. At this time, regardless of whether there is water in the water heater, or whether the water heater is used, the neon bulb will glow. According to this, the user can conclude that the ground wire is charged, and can detect the reverse leakage in time, and deal with it in time to ensure the safe use of electrical appliances in the whole family.

In order to achieve the purpose of the present invention, the following technical solutions can also be adopted: a water heater for monitoring and displaying ground wire electrification, including a shell, an inner tank, a water inlet and outlet pipe, a water inlet liner and a water outlet liner, and the water inlet liner is insulated The length L from the water inlet to the water outlet of the water inlet liner and the water outlet liner satisfies L>53r ² (r is the radius of the inner hole of the water inlet and outlet pipes), and the water heater is fixed or connected to the wall through an external hanger, which is characterized in that : The shell and the inner tank are insulated and installed. There is a good conductive connection between the external hanger and the shell. The water heater is fixed or connected to the wall through the wall-mounted bolts and the external hanger. The wall-mounted bolts and the external hanger are connected with good conductivity. Metal material is adopted, and the indicator light composed of neon bulbs and current limiting resistors connected in series is connected between the inner tank and the outer shell through wires.

In the above scheme, once the inner tank is electrified, a loop will be formed between the inner tank, the indicator light, the shell, the hanger, the bolt and the wall, and the indicator light will give an alarm prompt. The advantage of this solution is that the indicator light is set between the water heater inner tank and the outer tank in advance, and there is no need to install it separately. As long as the water heater is hung on the wall, the alarm circuit is formed, which avoids the problem of separately installing the alarm display line during the installation of the water heater. Because there is a hidden danger of missing installation or artificial damage to the line during use.

If the water heater does not leak electricity, and there is no reverse leakage, but the inner tank of the water heater may still be induced to the inner tank due to the distributed capacitance formed by the water heater circuit and the ground, and an induced potential will be generated. At this time, according to the above-mentioned technical solution, the indicator light may still be on, which will cause the user the illusion of electrical leakage.

In the present invention, a shunt resistor can be connected in parallel at both ends of the indicator light. Since the induced voltage has a high impedance to the ground, after the resistance is connected in parallel, the induced voltage enters the ground from the inner tank through the shunt resistor, so the indicator light will not be on. Therefore, connecting the above shunt resistor in parallel can distinguish the real leakage and induced voltage.

While ensuring the safety of the bathing environment, the water heater of the invention can display an alarm in time when the local line is electrified, and can distinguish whether it is electrical leakage or induction electrification. The invention is also convenient for finding the reverse leakage of the ground wire in time, and has the function of warning and prompting that the ground wire of the whole family is charged.

Description of drawings

Figure 1 is a schematic diagram of the exploded structure of some connecting parts of the water heater

Fig. 2 is a schematic structural view of an embodiment of the water heater of the present invention

Fig. 3 is a schematic structural view of another embodiment of the water heater of the present invention

Detailed ways

Embodiment 1

The present invention relates to a ground wire live monitoring and display water heater. The structure of the water heater itself is the structure of "an electric water heater for preventing electric shock" proposed by the applicant in the ZL01135300. Water pipe, water inlet liner 10 and water outlet liner 11, the water inlet liner 10 is an insulating pipe, and the length L from the water inlet to the water outlet of the water inlet liner 10 and water outlet liner 11 satisfies L>53r ² ( r is the inner hole radius of the inlet and outlet pipes). The structure of the above-mentioned water heater can ensure that even if the water heater leaks electricity, even if the inside of the water heater is fed with 242V voltage, the water outlet voltage of the water heater is lower than the safe voltage (36V) and within the range of the absolute safe voltage (12V). Therefore, the safety of the bather can be ensured.

In the present invention, the water heater is fixed or connected to the wall through the hanger bolt 1 and the outer hanger 3, the hanger bolt 1 and the outer hanger 3 are insulated by the insulating sleeve 2, and the outer shell 4 and the inner tank 9 of the above-mentioned water heater are passed through the inner wall. The bile bracket 6 is insulated from the bracket partition 5, the external hanger 3 is insulated from the inner tank 9, and the neon bulb 8 and the protective impedance 7 are connected between the inner tank 9 and the wall to form an indicator light. When the water heater leakage causes the liner 9 to be electrified (the ground wire is suspended in the air and not connected to the ground), the electricity will be introduced into the wall through the neon bulb 8 and the protective impedance 7 and enter the ground. At this time, no matter whether the user turns on the water heater or not, the indicator light will If the light is on, the user can conclude that the water heater is leaking electricity and repair it in time.

When the leakage of other electric appliances caused the ground wire to be electrified, the electric current would reversely enter the water heater liner 9 by the common ground wire or the ground wire of the water heater. At this moment, electricity will enter the body of wall and the earth through the neon bulb 8 and the protective impedance 7. At this time, no matter whether there is water in the water heater or whether the water heater is used, the neon bulb 8 will emit light. According to this, the user can conclude that the water heater is leaking electricity and repair it in time.

In order to ensure that the current value of the detection circuit is controlled within the safe current value of less than 6mA, and to ensure that the indicator light lights up and alarms, the invention sets the ignition voltage of the neon bulb to be greater than 75V, and the resistance greater than 6KΩ. The resistance is 40KΩ～150KΩ.

Embodiment 2

The above-mentioned water heater can also be installed with its shell 4 and inner tank 9 insulated, the external hanger 3 and the shell 4 are connected with good conductivity, and the wall-mounted bolt 1 is connected with the external hanger 3 with good conductivity. Can have good electrical conductivity with the body of wall; The indicator light that above-mentioned neon bulb and current-limiting resistor are connected in series is connected between inner liner 9 and shell 4.

The above scheme uses the shell 4, the hanger 3, and the bolt 1 as conductors to form a circuit with the wall. Once the inner tank 9 is charged, the electricity will pass through the inner tank 9, the neon bulb 8, the protective impedance 7, the outer shell 4, the hanger 3, and the bolts. 1. Introduce the body of wall into the earth, and the neon bulb 8 will emit light so as to give an alarm prompt. The advantage of this solution is that as long as the water heater is hung on the wall, the alarm circuit is formed, which avoids the problem of separately installing the alarm display line during the installation process, because there are hidden dangers of missing installation or artificial damage to the line during use.

Similarly, in order to ensure that the current value of the detection circuit is controlled within the safe current value, and to ensure that the indicator lamp lights up and alarms, the present invention sets the ignition voltage of the neon bulb to be greater than 75V, and the resistance is greater than 6KΩ, and to ensure that it is safe for people to touch the shell, In this embodiment, the safe current value is set to be less than 2mA, so the resistance of the voltage dividing resistor R connected in series is 100KΩ˜150KΩ.

If the water heater does not leak electricity, there is no reverse leakage, but the inner tank 9 of the water heater may still be induced on the inner tank due to the distributed capacitance formed by the water heater circuit and the earth, resulting in an induced potential. At this time, according to the above-mentioned technical solution, the indicator light may still be on, which will cause the user the illusion of electrical leakage.

In the present invention, a shunt resistor can be connected in parallel at both ends of the indicator light. Since the induced voltage has a high impedance to ground, after the resistance is connected in parallel, the induced voltage enters the ground from the inner tank through the shunt resistor, so the neon tube 8 will not emit light. Therefore, connecting the above shunt resistor in parallel can distinguish the real leakage and induced voltage. In the above-mentioned embodiment 1, the resistance value of the shunt resistor is set at 80KΩ-250KΩ, and in the embodiment 2, the resistance value of the shunt resistor is set at 80KΩ-250KΩ.

Claims (6)

1. A ground wire live monitoring display water heater, including a casing, an inner tank, an inlet and outlet pipe, an inlet liner and an outlet liner, the inlet liner is an insulating tube, and the inlet and outlet liners of the water inlet and outlet The length L from the water outlet to the water outlet satisfies L>53r ² (r is the radius of the inner hole of the water inlet and outlet pipes), and the water heater is fixed or connected to the wall through the external hanger. They are insulated from each other, and an indicator light composed of neon bulbs and protective impedance connected in series is connected by wires between the inner tank and the wall. 2. The water heater with electrified ground monitoring and display according to claim 1, characterized in that: the ignition voltage of the neon bulb is set to be greater than 75V, and the resistance is greater than 6KΩ; the resistance value of the voltage dividing resistor connected in series is 40KΩ～ 150KΩ. 3. The water heater for monitoring and displaying live wires according to claim 1 or 2, characterized in that a shunt resistor is connected in parallel at both ends of the indicator light, and the resistance value of the shunt resistor is 80KΩ-250KΩ. 4. A water heater for live monitoring and display of the ground wire, including a shell, an inner tank, an inlet and outlet pipe, an inlet liner and an outlet liner, the inlet liner is an insulating tube, and the inlet and outlet liners The length L from the water outlet to the water outlet satisfies L>53r ² (r is the radius of the inner hole of the water inlet and outlet pipes), and the water heater is fixed or connected to the wall through the external hanger and the wall bolt. , There is a good conductive connection between the outer shell and the external hanger and the wall-mounted bolts, and the indicator light composed of neon bulbs and current-limiting resistors connected in series is connected by wires between the inner tank and the outer shell. 5. The water heater with electrified ground monitoring and display according to claim 1, characterized in that: the ignition voltage of the neon bulb is set to be greater than 75V, and the resistance is greater than 6KΩ; the resistance value of the voltage dividing resistor connected in series is 100KΩ～ 150KΩ. 6. The water heater for monitoring and displaying live wires according to claim 4 or 5, characterized in that a shunt resistor is connected in parallel at both ends of the indicator light, and the resistance value of the shunt resistor is 200KΩ~300KΩ.

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