CN201159525Y - Electric shock prevention water storage type electric water heater - Google Patents

Abstract

The utility model discloses an electric shock prevention water storage formula electric water heater, including shell (1), install inner bag (2) inside shell (1), install heating tube (3) and the electricity-proof wall device inside inner bag (2), install inlet tube (4) and outlet pipe (5) on inner bag (2), the tip of inlet tube (4) and outlet pipe (5) still is connected with the electricity-proof wall device, the electricity-proof wall device include two insulating water pipe (6) that are linked together with inlet tube (4) and outlet pipe (5) respectively, the length numerical value L of insulating tube is greater than 53 times the numerical value of insulating tube hole radius r's square, wherein, insulating water pipe constitute by a plurality of side by side and head and the tail pipeline of intercommunication. The length of the insulating pipe ensures that even if an electric leakage accident occurs, the safety of a user can be ensured, the safety performance of the water storage type electric water heater is further improved, and the electric water heater is composed of a plurality of pipelines which are arranged side by side and communicated end to end, so that the length of the electric shock prevention device is shortened, and the structure of the electric water heater is more compact.

Description

An electric shock-proof water storage type electric water heater

1. Technical field:

The utility model relates to an electric shock-proof water storage type electric water heater, in particular, an electric shock-proof structure of the electric shock-proof water storage type electric water heater is designed.

2. Background technology:

In order to guarantee the user's safety, existing electric water heaters are all provided with an electric shock prevention device, and commonly used electric shock prevention devices have leakage switch and " electric shock protection wall ". The "anti-electric wall" proposed by Haier Company in the "Anti-shock Electric Heater" with patent No. CN01262062. When the sag is greater than 53 times the square of the radius of the inner hole, the current leaked by the electric water heater can be less than 10mA, thereby achieving the effect of preventing electric shock. This kind of anti-electric wall is simple and low in cost, but the radius of the insulating tube is generally 3-5 cm, and the length of the insulating tube is 1.3 meters. , and once the insulating tube is damaged, it cannot play the role of anti-electricity, which has certain potential safety hazards. The safety problem of electric water heater has not been completely solved, and it is necessary to further improve it. In addition, even if the "electricity protection wall" is configured, there are still some potential safety hazards. For example, the outer surface of the inner tank may be charged due to the leakage of electricity inside the inner tank, so that the parts outside the inner tank will not be charged, including the shell, hanging ears, etc. The situation of electric shock caused by human contact.

3. Contents of the utility model:

The purpose of this utility model is to provide an electric shock-proof water storage type electric water heater, which improves the structure of the anti-electric wall device, can ensure the safety of users, further improves the safety performance of the water storage type electric water heater, has a simple and compact structure, and is easy to install convenient.

A further object of the present utility model is to provide an electric water heater with electric shock-proof water storage, which strengthens the insulation structure between the heating pipe, the inner tank and the outer shell of the electric water heater, so that even if an electric leakage accident occurs, the safety of the user can be guaranteed, and the storage capacity can be further improved. Safety performance of water-type electric water heater.

The utility model is achieved through the following technical solutions:

An electric shock-proof water storage electric water heater, comprising a shell, an inner tank installed inside the outer shell, a heating tube installed inside the inner tank, and an anti-electric wall device, the inner tank is equipped with a water inlet pipe and an outlet pipe The end of the water pipe is also connected with an anti-electric wall device. The anti-electric wall device includes two insulated water pipes respectively connected to the water inlet pipe and the water outlet pipe. The length value L of the insulated pipe is greater than 53 times the radius r of the inner hole of the insulated pipe The numerical value of the square, wherein, the insulated water pipe is composed of several pipes connected side by side and end to end. The advantage of this structure is that the length of the insulating pipe ensures the safety of the user even if an electric leakage accident occurs, and further improves the safety performance of the storage type electric water heater. The length of the anti-shock device makes the structure more compact and the installation is simple and convenient.

Each of the above-mentioned insulated water pipes is divided into five sections of pipes, and the pipes of the two insulated water pipes are arranged in two layers. The structure has reasonable layout, simple structure, easy manufacture and convenient installation.

The above-mentioned anti-shock device is covered with a protective cover. Installing the anti-shock device in the protective cover can protect it from damage and further improve safety.

The inner surface of the above-mentioned liner is provided with an insulating layer, and the assembly part of the heating pipe and the liner is separated by an insulator. When the heating tube leaks electricity, the inner surface of the inner tank is made of enamel as an insulating layer to ensure that the outer surface of the inner tank is not charged, so that the parts outside the inner tank will not be charged, and the product safety performance is further improved.

The inner tank is provided with a heating tube mounting seat, and an insulating sealing cover is installed on the heating tube mounting seat. The insulating sealing cover separates the heating tube mounting seat from the tail of the heating tube, and the tail of the heating tube is installed on the heating tube through screws and nuts. On the seat, an insulator is used to separate the nut and the screw. This structure ensures the insulation between the heat pipe and the assembly of the liner, and has a simple structure and is easy to install.

As mentioned above, hanging lugs are installed on the shell, and insulators are used to separate the outer surface of the inner tank from the outer shell and the outer surface of the inner tank from the hanging ears. When the outer surface of the inner tank is electrified, the outer shell and the The hanging ears and end caps are not charged, further ensuring the safety of users.

The above-mentioned hanging lugs are installed on the surface of the shell through screws, and the tails of the screws pass through the shell and are connected to the lugs on the outer surface of the inner tank. The outer surface of the inner tank and the outer shell are separated by an insulator. The mounting ears are separated by insulating sheets. The outer surface of the liner is separated from the outer shell and the hanging ear by an insulator, which has a simple structure and is easy to install.

The above-mentioned insulating sheet is pressed under the head of the screw, even if the outer surface of the inner tank is charged, it will not be transmitted to the hanging lug through the screw.

4. Description of drawings:

Below in conjunction with accompanying drawing, the utility model is described in detail:

Fig. 1 is the front sectional schematic view of the utility model;

Fig. 2 is a side sectional schematic diagram of the utility model;

Fig. 3 is a schematic sectional view of the electric shock prevention device of the present utility model;

Fig. 4 is a side schematic view of the electric shock prevention device of the present utility model;

Fig. 5 is a partial enlarged view of A in Fig. 1;

FIG. 6 is a partial enlarged view of B in FIG. 2 .

5. Specific implementation methods:

Embodiment: As shown in Fig. 1 and Fig. 2, the utility model comprises a shell 1, an inner tank 2 installed inside the outer shell 1, a heat pipe 3 installed inside the inner tank 2 and an anti-electric wall device, and the inner tank 2 is installed There are water inlet pipe 4 and water outlet pipe 5, and the ends of water inlet pipe 4 and water outlet pipe 5 are also connected with anti-electric wall device. For the water pipe 6, the length value L of the insulating pipe is greater than 53 times the value of the square of the inner hole radius r of the insulating pipe, wherein the insulating water pipe 6 is composed of several parallel pipes connected end to end.

As shown in Fig. 3 and Fig. 4, the protective cover 18 is covered on the outside of the anti-shock device, and each insulated water pipe 6 in the anti-electric shock device is divided into five sections of pipes, and the pipes of the two insulated water pipes 6 are divided into two layers arranged.

In order to better protect the safety of users, in addition to the anti-electric wall device, the utility model also installs insulating parts between the inner tank 2, the outer shell 1 and the hanging ear 13, and the specific installation is as follows:

As shown in Figure 5, the inner surface of the liner 2 is provided with an insulating layer 7, the insulating layer 7 is generally an enamel layer, the inner liner 2 is provided with a heating pipe mounting seat 8, and an insulating seal is installed on the heating pipe mounting seat 8. Cover 11, the insulating sealing cover 11 separates the heating pipe mounting seat 8 from the tail of the heating pipe 3, the tail of the heating pipe 3 is installed on the heating pipe mounting seat 8 through the screw 9 and the nut 10, and an insulator is used between the nut 10 and the screw 9 12 separated. When the heat pipe 3 leaks in case, it can ensure that the outer surface of the inner bag 2 is not charged. As shown in FIG. 6 , an insulator is used to isolate the outer surface 14 of the inner tank 2 from the outer shell 1 , and the outer surface 14 of the inner tank 2 and the hanging ear 13 . The hanging lug 13 is installed on the surface of the shell 1 through the screw 15, and the tail of the screw 15 passes through the shell 1 and is connected to the lug 18 on the outer surface 14 of the inner tank 2, and an insulator 16 is passed between the outer surface 14 of the inner tank 2 and the outer shell 1 Insulation, the outer surface 14 of the inner tank 2 and the hanging ear 13 are isolated by an insulating sheet 17 . Insulating sheet 17 is to be pressed under the head of screw 15. This structure can ensure that the shell 1 and the hanging ear 13 are not charged when the outer surface 14 of the inner liner 2 is electrified.

According to specific tests and referring to the provisions of GB13955-92 (Installation and Operation of Earth Leakage Protector), the leakage current of the electric water heater is set at 10mA, which can ensure the safety of users. When the heating liner leaks electricity or the 220V power supply used is directly short-circuited to the heated water, the medium resistance of tap water R=220V/10mA=22×10 ³ Ω.

Because the resistivity ρ of tap water is equal to 1300Ω·cm, if the length of the insulating tube is L, the radius of the inner hole of the insulating tube is r, the dielectric resistance of water is R, and the resistivity of water is ρ,

but:

L＝R·πr ² /ρ＝22×10 ³ ×3.14÷1300≈53r ²

Therefore, when the length L of the insulating tube is greater than 53 times the square of the radius r of the inner hole, that is, L>53r ² , the water resistance of the tap water can be used as the anti-leakage isolation.

Claims (9)

1. An electric shock-proof water storage electric water heater, comprising a casing (1), an inner tank (2) installed inside the outer casing (1), a heating pipe (3) installed inside the inner tank (2), and an electric protection wall device, the water inlet pipe (4) and the water outlet pipe (5) are installed on the inner tank (2), and the ends of the water inlet pipe (4) and the water outlet pipe (5) are also connected with an anti-electricity wall device, and the anti-electricity wall The device includes two insulating water pipes (6) connected to the water inlet pipe (4) and the water outlet pipe (5) respectively, the length value L of the insulating pipe is greater than 53 times the value of the square of the inner hole radius r of the insulating pipe, and it is characterized in that: The insulating water pipe (6) described above is made up of several pipes arranged side by side and connected end to end. 2. An electric water storage water heater with protection against electric shock according to claim 1, characterized in that: the pipes of the two insulated water pipes (6) are arranged in two layers. 3. An electric shock-proof water storage electric water heater according to claim 2, characterized in that each of said insulated water pipes (6) is divided into 5 sections of pipes. 4. An electric shock-proof water storage electric water heater according to claim 3, characterized in that: said electric shock-proof device is covered with a protective cover (18). 5. An electric shock-proof water storage electric water heater according to claim 1 or 2 or 3 or 4, characterized in that: the inner surface of the inner tank (2) is provided with an insulating layer (7), and the heat pipe (3) The assembly part of the liner (2) is isolated by an insulator. 6. An electric shock-proof water storage electric water heater according to claim 5, characterized in that: the heating pipe mounting seat (8) is arranged on the inner tank (2), and the heating pipe mounting seat (8) is installed An insulating sealing cover (11) is arranged, and the insulating sealing cover (11) separates the heating pipe mounting seat (8) from the tail of the heating pipe (3), and the tail of the heating pipe (3) is installed on the On the heating pipe mounting seat (8), separate with insulator (12) between nut (10) and screw (9). 7. An electric shock-proof water storage electric water heater according to claim 5, characterized in that: hanging lugs (13) are installed on the shell (1), and the outer surface (14) of the inner tank (2) is in contact with the shell (1), the outer surface (14) of the liner (2) and the hanging ear (13) are separated by an insulator. 8. An electric shock-proof water storage electric water heater according to claim 7, characterized in that: the hanging lug (13) is installed on the surface of the shell (1) through a screw (15), and the tail of the screw (15) passes through the shell (1) connected to the lugs (18) on the outer surface (14) of the inner tank (2), separated by an insulator (16) between the outer surface (14) of the inner tank (2) and the outer shell (1), The outer surface (14) of the liner (2) is isolated from the hanging ear (13) by an insulating sheet (17). 9. An electric shock-proof water storage electric water heater according to claim 8, characterized in that the insulating sheet (17) is pressed under the head of the screw (15).

Images