CN203731653U - Electric-shock-preventive electric water heater - Google Patents

Abstract

The utility model discloses an electric water heater for preventing electric shock. By adopting an insulating inner tank and adopting an insulating tube for a water inlet pipe and a water outlet pipe arranged inside the inner tank, the utility model ensures reasonable structure, simple manufacturing process, While having the advantage of low production cost, it effectively prevents the electrical transfer of current between the water inlet pipe and the water outlet pipe inside the inner tank, and effectively prevents the current from flowing from the inner tank to the outer water outlet tube of the inner tank The electrical transmission makes the inner tank and the user form an overall current isolation, thereby ensuring electrical safety.

Description

A kind of anti-electric shock type electric water heater

technical field

The utility model relates to the electric water heater technology, in particular to an electric shock-proof electric water heater.

Background technique

There are two main methods of leakage prevention most commonly used in existing electric water heaters: one is to use a leakage protection switch, and the other is to install an automatic leakage detection device on the electric water heater; both of these methods are highly dependent on the device , in case the leakage protection switch or the automatic detection device is damaged or fails, there will be a safety hazard.

In order to overcome the shortcomings of the existing technology, people have developed a new anti-leakage method. In the event of a water heater leakage, the resistance of the water is used to reduce the current passing through the insulating connecting pipe below the safe current to ensure the safety of the user. And developed the corresponding electric water heater products, using two insulating pipes respectively connected to the water inlet and outlet pipes outside the shell of the electric water heater, the length of the insulation pipes meets the requirements of L>53r ² (r is the radius of the inner hole of the inlet and outlet pipes), However, although the external insulating tube of this product provides convenience for the disassembly, installation and maintenance of the water heater, it affects the shape of the electric water heater, and the external structure is easily damaged by collision, so other components need to be added to protect the supporting structure. Stability, which inevitably increases the cost of production.

Utility model content

The main purpose of the utility model is to provide an anti-shock electric water heater with reasonable structure, simple manufacturing process, low production cost and high safety.

An anti-shock electric water heater, comprising a shell, an insulation layer, an inner container, a heating pipe, a power control board connected to the heating pipe, a water inlet pipe and an outlet pipe arranged outside the inner container, and a water outlet pipe arranged inside the inner container. The water inlet pipe and the water outlet pipe inside the tank, the heat preservation layer is located between the outer shell and the inner tank, the water inlet tube and the water outlet tube inside the inner tank are insulating tubes, and the inner tank is Insulated liner.

Preferably, the anti-shock electric water heater further includes an operation control board connected to the power control board, and the operation control board is used to control the working power supplied to the heating pipe by the power control board.

Preferably, the water inlet pipe and the water outlet pipe arranged outside the inner container are insulating pipes.

Preferably, the anti-shock electric water heater also includes a sewage outlet arranged in the inner tank, and a magnesium rod fixedly arranged on the sewage outlet.

Preferably, the anti-shock electric water heater further includes a safety valve provided on the water inlet pipe outside the inner tank.

Preferably, the anti-shock electric water heater further includes a three-way pipe joint arranged on the water outlet pipe outside the inner tank.

Preferably, the water inlet pipe located inside the inner tank includes an inner tube and an outer tube, the top of the inner tube is provided with a water outlet hole communicating with the outer tube, and the lower part of the outer tube near the bottom of the inner tank is provided with several holes along the outer tube. Water outlet holes distributed around the pipe.

Preferably, the water inlet pipe provided inside the inner tank is also set with a water inlet guide cover covering the water outlet hole, and the water inlet guide cover includes a guide cover body and a water guide cover protruding from the water guide cover. The water retaining part on the cover body, the water inlet diversion cover has a water outlet channel based on the water retaining part, and the diversion cover body is provided with a hole for the water inlet pipe inside the inner tank to pass through. first via.

Preferably, the body of the shroud is protruded with multiple layers of water retaining parts arranged at intervals, and the water retaining parts are provided with a plurality of water outlets, and at least two adjacent two-layer water retaining parts are provided with outlets. The water outlets are distributed in a staggered manner, and the gaps between the water retaining parts of each layer and the water outlets form water outlet channels.

Preferably, the total length of the water inlet pipe arranged inside the inner container is greater than 53r ₁ ² , the total length of the water outlet pipe arranged inside the inner container is greater than 53r ₂ ² , r ₁ is the length of the water outlet pipe arranged inside the inner container The inner hole radius of the water inlet pipe, _r2 is the inner hole radius of the water outlet pipe arranged inside the inner tank.

Compared with the prior art, the utility model has the following advantages: the anti-shock type electric water heater adopts an insulating inner tank for the inner tank, and uses insulating tubes for the water inlet and outlet pipes inside the inner tank, ensuring With the advantages of reasonable structure, simple manufacturing process and low production cost, it effectively prevents the electrical transmission of current between the water inlet pipe and the water outlet pipe inside the inner tank, and effectively prevents the current from flowing from the inner tank to all The electrical transmission of the water outlet pipe outside the inner tank forms an overall current isolation between the inner tank and the user, thereby ensuring electrical safety.

Description of drawings

Fig. 1 is a structural schematic diagram of a preferred embodiment of the electric water heater for electric shock protection of the utility model.

Fig. 2 is a structural schematic diagram of a preferred embodiment of the water inlet guide cover installed on the electric water heater shown in Fig. 1 according to the utility model.

The realization of the purpose of the utility model, functional characteristics and advantages will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

It should be understood that the specific embodiments described here are only used to explain the utility model, and are not intended to limit the utility model.

Referring to Fig. 1 and Fig. 2, Fig. 1 is a structural schematic diagram of the electric water heater for preventing electric shock of the present invention; Fig. 2 is a water inlet guide cover for being installed on the electric water heater for preventing electric shock shown in Fig. 1 of the present utility model. Schematic diagram of the structure of the embodiment.

The anti-shock type electric water heater provided in this embodiment includes a shell 1, an insulating layer 2, an inner container 3, a heating pipe 10, a power control board 12 connected to the heating pipe 10, and a water inlet pipe and an outlet arranged outside the inner container 3. The water pipe (not shown in the figure), the water inlet pipe 5 and the water outlet pipe 6 located inside the inner tank 3, and the insulation layer 2 are located between the shell 1 and the inner tank 3. In order to effectively hinder the electrical transmission of current between the water inlet pipe 5 and the water outlet pipe 6, and at the same time, in order to effectively prevent the electrical transmission of the current from the inner tank 3 to the outer water outlet pipe (not shown in the figure) of the inner tank 3, the inner tank 3 and the user form an integral current isolation, the water inlet pipe 5 and the water outlet pipe 6 are insulating pipes, and the inner tank 3 is an insulating inner tank. The insulation layer 2 is used to block heat transfer between the outer shell 1 and the inner tank 3 to save heat energy, and is made of any suitable insulation material (for example, foamed plastic). The heating tube 10 is arranged in the inner tank 3 , the power control board 12 provides working power for the heating tube 10 , and the heating tube 10 is used for heating the water in the inner tank 3 .

In order to control the heating of the heating pipe 10, the electric water heater of the electric shock prevention type also includes an operation control board 11 connected to the power control board 12, and the operation control board 11 is used to control the working power supplied to the heating pipe 10 by the power control board 12. .

In order to achieve a better electrical transmission barrier effect between the water inlet pipe 5 and the water outlet pipe 6, the total length of the water inlet pipe 5 should be greater than 53r ₁ ² (r ₁ is the radius of the inner hole of the water inlet pipe), and the total length of the water outlet pipe 6 should be Greater than 53r ₂ ² (r ₂ is the inner hole radius of the outlet pipe).

Further, in order to improve the overall current isolation effect between the inner tank 3 and the user, the external water inlet pipe (not shown in the figure) and the water outlet pipe (not shown in the figure) of the inner tank 3 are also insulated pipes.

Further, in order to prevent the inner tank 3 from being corroded and prevent impurities in the water from adhering to the inner tank 3 to form scale, the electric water heater of the electric shock prevention type also includes a sewage outlet 7 arranged in the inner tank 3, and a sewage outlet 7 fixedly arranged on the sewage outlet 7 The magnesium rod 4 on the top is used for anti-corrosion protection of the inner tank 3, and the sewage outlet 7 is used for emptying the sewage in the inner tank 3.

Further, the anti-shock electric water heater also includes a safety valve 9 arranged on the water inlet pipe outside the inner tank 3, which is used to ensure that the pressure is relieved in time when the water pressure is too high during the heating process, so as to ensure safe use. During the process, there will be water dripping out of the safety valve 9, but it does not mean that the safety valve 9 will definitely drip water during heating. If the water pressure is within the tolerance range of the safety valve 9, it will not drip; and it is used when the inner tank 3 stops water intake Prevent the water from flowing backwards, ensure that the inner tank 3 must be full of water, and avoid dry burning.

Further, the anti-shock electric water heater also includes a three-way pipe joint 8 arranged on the outer water outlet pipe of the liner 3, which is used to make the electric water heater have two hot water outlet pipes, avoiding a single The hot water outlet line brings a single hot water supply outlet location.

Further, the water inlet pipe 5 includes an inner pipe and an outer pipe (not shown in the figure), the top of the inner pipe is provided with a water outlet hole communicating with the outer pipe, and the lower part of the outer pipe near the bottom of the inner tank 3 is provided with a number of holes along the outer pipe. Water outlet holes distributed around. During the working process of the electric water heater, cold water flows into the inner tank 3 after passing through the inner pipe of the water inlet pipe 5, the water outlet hole of the inner pipe, the gap between the inner pipe and the outer pipe, and the water outlet hole of the outer pipe. The diameter of the water outlet hole set on the top of 5 is usually small, and in the case of a large water flow, the flow velocity of the water will be very large, thereby causing a large disturbance to the water body in the inner tank 3 and accelerating the flow of hot and cold water. The mixing speed destroys the stratification of cold and hot water in the inner tank 3, and the hot water in the upper layer cannot be effectively discharged through the outlet pipe 6, which reduces the hot water output rate. In order to slow down the cold water flowing into the inner tank 3 from the water inlet pipe 5 to cause greater disturbance to the water body in the inner tank 3, avoid the destruction of the stratification of cold and hot water in the inner tank 3, thereby ensuring that the electric shock-proof electric The water heater has a higher hot water output rate, and the water inlet pipe 5 of the electric water heater of the electric shock prevention type is also set with a water inlet guide cover 20 (as shown in Figure 2 ), the shape of the water inlet shroud 20 can be a cylinder, a cube or any other shape, and the water inlet shroud 20 is provided with a water outlet channel to guide the cold water flowing out from the outlet hole of the outer pipe , so that the water flows into the inner tank 3 slowly and evenly. The water inlet deflector 20 includes a deflector body 21 and a water retaining portion 22 protruding from the deflector body 21. The deflector body 21 is provided with a first through hole 211 through which the water inlet pipe 5 passes. Thus, the water inlet guide cover 20 can be directly set on the water inlet pipe 5, and the structure is simple and the installation is convenient. The water retaining part 22 provided on the shroud body 21 can block the cold water flowing out quickly from the water outlet hole of the water inlet pipe 5 layer by layer, reducing the kinetic energy of the cold water, and the cold water flowing between the water retaining parts 22 is easy to form Turbulent flow, thus greatly reducing the flow rate of the incoming water, solving the problem of destroying the stratification of cold and hot water due to the injection of cold water during the use of the existing electric water heater, improving the hot water output rate and reducing the energy of the electric water heater consumption.

Further, in this embodiment, at least two layers of water retaining parts 22 arranged at intervals protrude from the shroud body 21, and the water retaining parts 22 are provided with a plurality of water outlets 221, and the water outlets 22 provided on each layer of water retaining parts 22 The water inlet 221 is roughly distributed along the outer circumference of the water inlet pipe 5, thereby expanding the range of water flow distribution, so that the water flowing out of the water inlet pipe 5 is more evenly injected into the inner tank 3, and there are at least two adjacent two-layer water retaining parts 22 The water outlets 221 are provided in a staggered distribution, and the gaps between the water retaining parts 22 of each layer and the water outlets 221 form a water outlet channel, which can cause turbulence in the water flowing through it, thereby reducing the water flow velocity. At the same time, the water outlet channel provided on the water inlet guide cover 20 also increases the flow area of the cold water, further reducing the flow velocity of the cold water entering the inner tank. Therefore, the water inlet guide cover 20 of this embodiment can alleviate or avoid the impact of cold water on the hot water layer, improve the hot water output rate of the electric water heater and save electric energy.

It should be understood that the above are only preferred embodiments of the present utility model, and cannot therefore limit the patent scope of the present utility model. Any equivalent structure or equivalent flow conversion made by using the utility model specification and accompanying drawings, or directly or Indirect applications in other related technical fields are all included in the scope of patent protection of the utility model in the same way.

Claims (10)

1. an anti-electric shock type electric water heater, comprise shell, heat-insulation layer, inner bag, heating tube, the power board being connected with described heating tube, water inlet pipe and the outlet pipe of being located at described inner bag outside, be located at water inlet pipe and the outlet pipe of described inner bag inside, described heat-insulation layer is between described shell and described inner bag, it is characterized in that: described water inlet pipe and the outlet pipe of being located at described inner bag inside are insulation tube, and described inner bag is insulation inner bag.

2. anti-electric shock type electric water heater according to claim 1, it is characterized in that: described anti-electric shock type electric water heater also comprises the operation control panel being connected with described power board, described operation control panel is transported to the working power of described heating tube for controlling described power board.

3. anti-electric shock type electric water heater according to claim 1, is characterized in that: water inlet pipe and the outlet pipe of being located at described inner bag outside are insulation tube.

4. anti-electric shock type electric water heater according to claim 1, is characterized in that: described anti-electric shock type electric water heater also comprises the sewage draining exit of being located in described inner bag, and is fixed at the magnesium rod on described sewage draining exit.

5. anti-electric shock type electric water heater according to claim 1, is characterized in that: described anti-electric shock type electric water heater also comprises the safety valve on the water inlet pipe of being located at described inner bag outside.

6. anti-electric shock type electric water heater according to claim 1, is characterized in that: described anti-electric shock type electric water heater also comprises the tee pipe coupling on the outlet pipe of being located at described inner bag outside.

7. anti-electric shock type electric water heater according to claim 1, it is characterized in that: the water inlet pipe of being located at described inner bag inside comprises inner and outer tubes, the top of inner tube is provided with the apopore being communicated with outer tube, and outer tube offers some apopores along outer tube circumferential distribution near the lower fragment position of described inner bag bottom.

8. anti-electric shock type electric water heater according to claim 7, it is characterized in that: the water inlet pipe of being located at described inner bag inside is also set with the water inlet kuppe that described apopore is covered, described water inlet kuppe comprises kuppe body and is convexly set in the retaining section on described kuppe body, on described water inlet kuppe, with the exhalant canal based on described retaining section, described kuppe body offers the first through hole passing for the water inlet pipe of being located at described inner bag inside.

9. anti-electric shock type electric water heater according to claim 8, it is characterized in that: on described kuppe body, convex with the retaining section that Spaced is arranged, described retaining section offers multiple delivery ports, have at least the delivery port arranging on two adjacent two-layer retaining sections to be and be in staggered distribution, gap and described delivery port between each layer of retaining section form aquaporin.

10. according to the anti-electric shock type electric water heater described in claim 1-9 any one, it is characterized in that: the total length of being located at the water inlet pipe of described inner bag inside is greater than 53r ₁ ², the total length of being located at the outlet pipe of described inner bag inside is greater than 53r ₂ ², r ₁for being located at the interior pore radius of water inlet pipe of described inner bag inside, r ₂for being located at the interior pore radius of outlet pipe of described inner bag inside.