CN213273198U

CN213273198U - Double water outlet type electric water heater

Info

Publication number: CN213273198U
Application number: CN202021675206.1U
Authority: CN
Inventors: 于国兴
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-08-12
Filing date: 2020-08-12
Publication date: 2021-05-25
Anticipated expiration: 2030-08-12

Abstract

The application discloses a double-water-outlet electric water heater, which comprises a water heater provided with a volume type inner container, a heating body used for heating water in the volume type inner container, an electric control system used for controlling the heating body, a heat exchange device and a zero-cold-water device, wherein the heat exchange device comprises a heat exchanger and a first temperature regulating valve, the heat exchanger is provided with a cold-water inlet connected with a tap water pipe and a hot-water outlet connected with a hot-water inlet of the first temperature regulating valve, the cold-water inlet of the first temperature regulating valve is connected with the tap water pipe, and a water outlet of the first temperature regulating valve is used for being connected with a small amount of hot-water consumption points; the zero-cold water device comprises a second temperature regulating valve, a cold water inlet of the second temperature regulating valve is connected with a water outlet pipe of the gas water heater, a hot water inlet of the second temperature regulating valve is connected with a hot water outlet of the volume type liner, a water outlet of the second temperature regulating valve is connected with a large amount of hot water consumption points, and the temperature of water in the volume type liner is higher than the temperature of water outlet of the second temperature regulating valve. The problem of utilize current mode to realize that zero cold water loss is high, with high costs and gas heater frequently starts is solved.

Description

Double water outlet type electric water heater

Technical Field

The application relates to the technical field of water heaters, in particular to a double-water-outlet type electric water heater.

Background

When hot water is used, particularly a hot water point far away from a water heater, a section of cold water needs to be put in order to get the hot water. For example, when a gas water heater is used, when a toilet washes hands and brushes teeth, cold water needs to be put in the kitchen for 30 seconds to 1 minute due to the fact that the gas water heater is in the kitchen, and water resource waste is caused; for the existing gas water heater, no matter washing hands or bathing, the gas water heater can be used for heating water only by burning, and when the gas water heater is started, noise is generated. Therefore, many households install a single small water heater to serve as a hand washing water heater to avoid the gas water heater starting when a small amount of water is used.

In order to solve the problem that the hot water for the gas water heater needs to wait for the hot water reaching time in a toilet, a section of water return pipe needs to be added on the basis of the original hot water pipe, and the water in the hot water pipe flows back to the water heater through the water return pipe by a water pump, so that the whole section of hot water pipe and the water return pipe are filled with the hot water, and the hot water is discharged quickly (within 3-5 seconds) when the hot water is used. After the water pump circulates once, water in the pipeline is cooled down after a period of time (about 20 minutes), so that the water pump circulates once every other period of time, and the function is called zero-cold water.

The disadvantages of the above way of achieving zero cold water are: (1) causing a great energy consumption. For example, to maintain hot water at 40 ℃ or more in a pipeline for 24 hours, the water pump needs to circulate 50-80 times a day, which wastes a lot of energy; (2) the water heater can also be repeatedly started for heating, and the service life of the water heater can be influenced. The zero-cold water is additionally controlled in several ways, such as time type or point control type, that is, pipeline circulation is carried out in a specific time, so that energy consumption is reduced, but inconvenience is brought to a user, and the zero-cold water at any moment cannot be guaranteed. (3) Because more than one water return pipe is needed, more investment is caused.

Therefore, how to solve the problems that the existing mode is high in zero cold water loss and high in cost, and a gas water heater needs to be started when a small amount of hot water is used for washing hands and the like is a key technical problem to be solved by technical personnel in the field.

SUMMERY OF THE UTILITY MODEL

In order to overcome the problems in the related art at least to a certain extent, the application aims to provide a double-water-outlet electric water heater, which can realize zero cold water, can realize high loss and high cost of the zero cold water by using the existing mode, and simultaneously solves the problem that a gas water heater needs to be started when a small amount of hot water is used, such as washing hands and the like.

The application provides a two water formula electric water heater, including:

the water heater comprises a water heater provided with a volume type inner container, a heating body used for heating water in the volume type inner container and an electric control system used for controlling the heating body;

the heat exchange device is positioned in the water heater and comprises a heat exchanger positioned in the volume type inner container and a first temperature regulating valve positioned outside the volume type inner container, the heat exchanger is provided with a cold water inlet connected with a tap water pipe and a hot water outlet connected with a hot water inlet of the first temperature regulating valve, the cold water inlet of the first temperature regulating valve is connected with the tap water pipe, and a water outlet of the first temperature regulating valve is used for being connected with a small amount of hot water consumption points;

and the zero-cold water device comprises a second temperature regulating valve, a cold water inlet of the second temperature regulating valve is connected with a water outlet pipe of the gas water heater, a hot water inlet of the second temperature regulating valve is connected with a hot water outlet of the volume type liner, a water outlet of the second temperature regulating valve is used for being connected with a large number of hot water consumption points, and the temperature of water in the volume type liner is higher than the water outlet temperature of the second temperature regulating valve.

Preferably, the heat exchanger is a coil heat exchanger.

Preferably, the surface area of the coil heat exchanger is greater than or equal to 0.25 square meters.

Preferably, a first three-way pipe is arranged in the water heater, a first pipe orifice of the first three-way pipe is connected with a water outlet pipe of the gas water heater, a second pipe orifice of the first three-way pipe is connected with a cold water inlet of the second temperature regulating valve, and a third pipe orifice of the first three-way pipe is connected with a cold water inlet of the positive displacement inner container.

Preferably, a second three-way pipe is arranged in the water heater, a first pipe orifice of the second three-way pipe is connected with the tap water pipe, a second pipe orifice of the second three-way pipe is connected with a cold water inlet of the first temperature regulating valve, and a third pipe orifice of the second three-way pipe is connected with a cold water inlet of the heat exchanger.

Preferably, a polyurethane foam heat-insulating layer is arranged outside the positive displacement inner container.

Preferably, the electric control system comprises a regulation and control component and a temperature sensor positioned in the positive displacement inner container, the temperature sensor is electrically connected with the regulation and control component, the regulation and control component is electrically connected with the heating body, and when the temperature sensed by the temperature sensor is lower than a preset temperature, the regulation and control component controls the heating body to heat.

Preferably, the gas water heater further comprises a shell, wherein a first cold water inlet, a second cold water inlet, a first hot water outlet and a second hot water outlet are arranged on the shell, the first cold water inlet is connected with a water outlet pipe of the gas water heater and a first pipe orifice of the first three-way pipe, the second cold water inlet is connected with a first pipe orifice of the tap water pipe and a first pipe orifice of the second three-way pipe, the first hot water outlet is connected with a water outlet of the second temperature regulating valve and the large amount of hot water consumption points, and the second hot water outlet is connected with a water outlet of the first temperature regulating valve and the small amount of hot water consumption points.

Preferably, the electronic control system further comprises a temperature adjusting knob and a temperature display component, and the temperature adjusting knob and the temperature display component are both electrically connected with the regulating and controlling assembly.

Preferably, the heating body is an electric heating rod.

The technical scheme provided by the application can comprise the following beneficial effects:

the application provides a double-water-outlet electric water heater which comprises a second water heater provided with a volume type inner container, a heating body, an electric control system, a heat exchange device, a first temperature regulating valve and a second temperature regulating valve. The heating body can warm the water in the volume type inner container to the temperature set by the electric control system, and the water in the tap water pipe can exchange heat with the water in the volume type inner container through the heat exchanger to become hot water which flows through the first temperature regulating valve and flows into a small amount of hot water consumption points at a proper water temperature, so that a user can wash hands and face; when a user takes a shower, the water in the tap water pipe passes through the gas water heater, the cold water remained in the pipeline between the gas water heater and the double-water-outlet electric water heater flows into the cold water inlet of the second temperature regulating valve and the cold water inlet of the water heater, meanwhile, the hot water in the positive displacement inner container flows into the second temperature regulating valve from the hot water inlet of the second temperature regulating valve, is mixed with the inflowing cold water, flows into a large number of hot water consumption points (namely a shower device) at constant temperature, and is used for bathing of the user, and when the hot water of the gas water heater arrives, the hot water directly flows into the cold water inlet of the temperature regulating valve and flows into the. No more cold water flows into the first water heater inlet, and no more hot water flows out of the first water heater. Thus, the effect of constant temperature and zero cold water is achieved, and part of cold water flowing into the positive displacement inner container from the original pipeline is heated into hot water by the heating body.

So set up, utilize this two play water electric water heater, can low energy consumption realize zero cold water, need not arrange the wet return, reduce cost, the gas heater of washing hands does not start, noise reduction and energy consumption need not purchase wet return (or water pump), and reduce cost has solved and has utilized current mode to realize the problem that zero cold water loss is high, with high costs and gas heater frequently starts.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the application.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present application and together with the description, serve to explain the principles of the application.

FIG. 1 is a schematic view of an installation of the present dual-outlet electric water heater, according to some exemplary embodiments;

FIG. 2 is a block diagram of a dual-outlet water heater, according to some example embodiments.

In the figure:

1. a housing; 2. a tap water pipe; 3. a heating body; 4. a power supply control line; 5. a temperature sensor; 6. a regulatory component; 7. a positive displacement inner container; 8. a coil heat exchanger; 9. a gas water heater; 10. a water outlet pipe of the gas water heater; 11. a second temperature regulating valve; 12. a shower hot water pipe; 13. a faucet hot water conduit; 14. a first cold water inlet; 15. a first hot water outlet; 16. a second cold water inlet; 17. a second hot water outlet; 18. a hot water outlet of the positive displacement inner container; 19. a hot water inlet of a second thermostatic valve; 20. a cold water inlet of the second thermostatic valve; 21. a water outlet of the second temperature regulating valve; 22. a first temperature regulating valve.

Detailed Description

Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. When the following description refers to the accompanying drawings, like numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. Rather, they are merely examples of apparatus consistent with certain aspects of the present application, as detailed in the appended claims.

Referring to fig. 1-2, the present embodiment provides a dual-outlet electric water heater, which includes a water heater with a volume type inner container 7, a heating body 3 for heating water in the volume type inner container 7, an electric control system for controlling the heating body 3, a heat exchange device, and a zero-cold water device.

Wherein the heat exchange device is provided with a heat exchanger and a first temperature regulating valve 22, the heat exchanger is arranged in the volume type inner container 7, the first temperature regulating valve 22 is arranged in the water heater and is arranged outside the volume type inner container 7, the heat exchanger is provided with a cold water inlet and a hot water outlet, the cold water inlet is connected with the tap water pipe 2, the hot water outlet is connected with the hot water inlet of the first temperature regulating valve 22, the cold water inlet of the first temperature regulating valve 22 is connected with the tap water pipe 2, the water outlet of the first temperature regulating valve 22 is used for being connected with a small amount of hot water consumption points, so that the tap water entering the heat exchanger is changed into hot water after exchanging heat with the water in the positive displacement inner container 7, flows into the first temperature regulating valve 22 from the hot water outlet, is mixed with the cold water and reaches a proper temperature, then a small amount of hot water is fed from the water outlet of the first temperature regulating valve 22, so that a small amount of hot water required during hand washing is realized.

It should be noted that, because the hand washing process is short, only 10-30 seconds are needed, and the requirement of hand washing on the water temperature is low, the water in the heat exchanger is enough for a user to wash hands.

In this embodiment, the heat exchanger may be a coil heat exchanger 8, and the surface area of the coil heat exchanger 8 is greater than or equal to 0.25 square meters, i.e., the coil heat exchanger 8 may be composed of a stainless steel tube having a diameter of 16mm and a length of 5 meters. Thus, the heat exchange capacity of the coil heat exchanger 8 is not less than 5 KW.

The zero-cold water device comprises a second temperature regulating valve 11, as shown in fig. 1, a cold water inlet 20 of the second temperature regulating valve is connected with a water outlet pipe 10 of the gas water heater, a cold water inlet of the gas water heater 9 is connected with a tap water pipe 2, so that tap water can flow into the second temperature regulating valve 11 through water heated by the gas water heater 9, a hot water inlet 19 of the second temperature regulating valve is connected with a hot water outlet 18 of the positive displacement liner, and a water outlet 21 of the second temperature regulating valve is connected with a large amount of hot water points (namely, shower devices). Thus, tap water is heated when flowing through the gas water heater 9, cold water in a connecting pipeline between the gas water heater 9 and the device flows into the cold water inlet 20 of the second temperature regulating valve and the cold water inlet of the volume type inner container, hot water at the hot water outlet 18 of the volume type inner container flows into the second temperature regulating valve 11 to be mixed with cold water entering from the cold water inlet 20 of the second temperature regulating valve, and then flows into a large amount of hot water using points (shower devices) from the water outlet 21 of the second temperature regulating valve; when tap water flows to the second temperature regulating valve 11 after being heated by flowing through the gas water heater 9, hot water directly flows into the second temperature regulating valve 11 from the cold water inlet 20 of the second temperature regulating valve, and therefore zero cold water in a shower is achieved. The cold water initially flowing into the positive displacement inner container 7 heats the heated body 3 to a preset temperature, and waits for the next use. Here, the shower device may be a shower head.

It should be noted that the temperature of the water in the positive displacement inner container 7 is higher than the outlet water temperature of the second temperature regulating valve 11, and the temperature of the hot water heated by the gas water heater 9 is preferably close to or equal to the outlet water temperature of the second temperature regulating valve 11. In this way, zero cold water is facilitated. Here, the distance between the second temperature control valve 11 and the hot water spot (shower device) is short, and the time for discharging cold water between the two is negligible.

The gas water heater 9 is installed in a kitchen, the distance between the gas water heater 9 and the shower device is long, cold water is stored in a water outlet pipe 10 of the gas water heater when the gas water heater is used, the water outlet pipe 10 of the gas water heater is connected with a cold water inlet 20 of the second temperature regulating valve and a cold water inlet of the volume type liner, so that the cold water in the gas water heater 9 can enter the second temperature regulating valve 11 and the volume type liner 7, and flows into the shower device after being mixed with the water in the volume type liner 7 in the second temperature regulating valve 11, and zero cold water in a shower is achieved.

It should be noted that the small amount of hot water consumption points may be embodied as a faucet at a hand washing sink, and the large amount of hot water consumption points may be embodied as a shower device.

So set up, in utilizing this two play water electric hot water, can low energy consumption realize zero cold water, need not arrange the wet return, reduce cost, gas heater does not start during the hand washing, and noise reduction and energy consumption need not purchase the wet return, and reduce cost has solved and has utilized current mode to realize the problem that zero cold water loss is high and with high costs.

In this embodiment, a first three-way pipe is arranged in the water heater, a first pipe orifice of the first three-way pipe is connected with a water outlet pipe 10 of the gas water heater, a second pipe orifice of the first three-way pipe is connected with a cold water inlet 20 of the second temperature regulating valve, and a third pipe orifice of the first three-way pipe is connected with a cold water inlet of the positive displacement inner container, so that water in the water outlet pipe 10 of the gas water heater can flow into the second temperature regulating valve 11, water can be added into the positive displacement inner container 7, and the phenomenon of no water in the positive displacement inner container 7 is avoided.

Wherein, the cold water inlet of positive displacement inner bag is connected to the bottom of positive displacement inner bag 7 through the pipeline to improve the hot water utilization ratio of positive displacement inner bag 7, guarantee that the hot water outlet 18 of positive displacement inner bag flows out hot water, and the cold water that flows into in the positive displacement inner bag 7 also can be by rapid heating.

It should be noted that the heating body 3 is disposed at the bottom end of the volumetric inner container 7, the heating body 3 may be an electric heating rod, and the hot water outlet 18 of the volumetric inner container is disposed at the top end of the volumetric inner container 7.

And the water quantity of the water outlet pipe 10 of the gas water heater can be less than 60 percent of the solvent of the positive displacement inner container 7.

In this embodiment, a second three-way pipe is further disposed in the water heater, a first pipe orifice of the second three-way pipe is connected to the tap water pipe 2, a second pipe orifice of the second three-way pipe is connected to the cold water inlet of the first temperature regulating valve 22, and a third pipe orifice of the second three-way pipe is connected to the cold water inlet of the heat exchanger, so that tap water can enter the heat exchanger, and can enter the first temperature regulating valve 22 to be mixed with hot water flowing out of the heat exchanger to reach a proper temperature in the first temperature regulating valve 22, so that a user can wash hands and face. The suitable temperature here is in particular a temperature value which the user adjusts to.

Preferably, a polyurethane foam heat insulation layer is arranged outside the positive displacement inner container 7 to wrap the positive displacement inner container 7, so that the positive displacement inner container 7 is heat-insulated.

In some embodiments, the double-outlet electric water heater further includes a housing 1, the housing 1 is provided with a first cold water inlet 14, a second cold water inlet 16, a first hot water outlet 15 and a second hot water outlet 17, the first cold water inlet 14 is connected to the outlet pipe 10 of the gas water heater and the first pipe orifice of the second tee pipe, so that the outlet pipe 10 of the gas water heater passes through the first cold water inlet 14 to be connected to the second tee pipe, so as to be connected to the second thermostat 11. The second cold water inlet 16 is connected to the tap water pipe 2 and the inlet of the heat exchanger to facilitate the flow of tap water into the heat exchanger. The first hot water outlet 15 is connected to the water outlet 21 of the second thermostatic valve and is connected to a large number of hot water consumption points (shower devices) through a shower hot water pipe 12 so that the constant temperature water, which is tempered by the second thermostatic valve 11, can flow into the shower devices. The second hot water outlet 17 is connected to the water outlet of the first thermostatic valve 22 and to a small amount of hot water consumption points (water tap) via a hot water pipe 13 of the water tap, so that hot water generated after heat exchange can be used for washing hands and face of a user.

In this embodiment, the electronic control system includes a regulation and control component 6 and a temperature sensor 5, the temperature sensor 5 is disposed in the positive displacement liner 7, the temperature sensor 5 is electrically connected to the regulation and control component 6, the regulation and control component 6 is electrically connected to the heating body 3, and specifically, the regulation and control component 6 is connected to the heating body 3 through the power control line 4. Temperature sensor 5 can transmit the temperature signal who senses for regulation and control subassembly 6, and regulation and control subassembly 6 controls heating member 3 according to the temperature value that temperature sensor 5 sensed and connects the electricity or cut off the power supply to the heating temperature and the length of time of control heating member 3 to the water in positive displacement inner bag 7. When the temperature value sensed by the temperature sensor 5 is lower than the preset temperature, the regulating and controlling assembly 6 controls the heating body 3 to heat, namely controls the heating body 3 to be electrified to work, so that water in the volume type inner container 7 is heated, and when the water in the volume type inner container 7 reaches the preset temperature, the regulating and controlling assembly 6 controls the heating body 3 to stop heating. In this way, the water in the positive displacement inner container 7 can be kept at a constant temperature.

In particular, the regulating component 6 may be a digital display or a mechanical panel.

The electric control system further comprises a temperature adjusting knob and a temperature display component, the temperature adjusting knob and the temperature display component are electrically connected with the regulating and controlling assembly 6, therefore, a user can set preset temperature through the temperature adjusting knob, and the regulating and controlling assembly 6 can control the heating body 3 according to the preset temperature. The temperature display component can be specifically a temperature display screen, and the regulation and control assembly 6 can control the temperature display screen to display the temperature of the water in the positive displacement inner container 7, so that a user can observe the temperature conveniently.

When the water tap connected with the second hot water outlet 17 is opened, tap water enters through the second cold water inlet 16 and flows through the coil type heat exchanger 8, the tap water flows out of the second hot water outlet 17 through the first temperature regulating valve 22 after heat exchange, and the tap water does not flow through the gas water heater 9, so that the gas water heater 9 is not started.

When the switch of the shower device (shower head) is turned on, the tap water flows through the gas water heater 9, the water outlet pipe of the gas water heater, the first three-way pipe and the second temperature regulating valve 11 and flows out from the first hot water outlet 15. Such as: when the temperature of the gas water heater 9 is set to be 45 ℃, the water temperature of the volume type inner container 7 is set to be 50 ℃, the volume of the volume type inner container 7 is 6L, the water outlet temperature of the second temperature regulating valve 11 is set to be 45 ℃, the water outlet pipe 10 of the gas water heater is DE20 pipe diameter, the length is 10 meters, and the water capacity of cold water of the water outlet pipe 10 of the gas water heater is 2L. When the shower head is opened, tap water flows into the water heater and is heated to 45 ℃, cold water in the water outlet pipe 10 of the gas water heater flows into one part of the volume type inner container 7, hot water at 50 ℃ in the volume type inner container 7 flows into the second temperature adjusting valve 11 through the hot water inlet 19 of the second temperature adjusting valve, the other part of cold water in the water outlet pipe 10 of the gas water heater flows into the second temperature adjusting valve 11 through the cold water inlet 20 of the second temperature adjusting valve, and the two parts of water are mixed to 45 ℃ in the second temperature adjusting valve 11 and then flow into the shower head from the water outlet 21 of the second temperature adjusting valve. When 10 meters of water (namely 2L of water) in the gas water heater 9 is used up, 45 ℃ hot water heated by the gas water heater 9 reaches, the 45 ℃ hot water completely flows into the cold water inlet 20 of the second temperature regulating valve, the hot water inlet 19 of the second temperature regulating valve is automatically closed, and the shower head continues to use the 45 ℃ hot water. At this time, the temperature of the bottom water is lower than 50 ℃ because cold water flows in and hot water flows out of the interior of the positive displacement inner container 7 (because the cold water flows in from the bottom), and the electric control system controls the heating body 3 to start to raise the water in the positive displacement inner container 7 to 50 ℃ to wait for the next use.

It should be noted that, in a household with a size of about 100, the distance from the kitchen to the toilet is within 10 meters, so that assuming that the length of the water outlet pipe 10 of the gas water heater is 10 meters, the volume of the positive displacement liner 7 is generally 6 liters, and if the length of the water outlet pipe 10 of the gas water heater is 15 meters, the principle is the same as that described above, and the water volume in the water outlet pipe 10 of the gas water heater only needs to be controlled not to exceed 60% of the volume of the positive displacement liner.

DE20 is the normal domestic hot water pipe diameter, the cold water capacity calculation in the 10 meter pipe: length of inner diameter of pipe, 10m 3.14 m (0.008m)²＝0.002m³＝2L。

It should be noted that the terms "first," "second," and the like, as used herein, are not intended to limit the specific order, but merely to distinguish one element or function from another.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

It is understood that the same or similar parts in the above embodiments may be mutually referred to, and the same or similar parts in other embodiments may be referred to for the content which is not described in detail in some embodiments.

Although embodiments of the present application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting the present application, and that variations, modifications, substitutions and alterations may be made to the above embodiments by those of ordinary skill in the art within the scope of the present application.

Claims

1. A double-water-outlet electric water heater is characterized by comprising:

the water heater is provided with a volume type inner container (7), a heating body (3) used for heating water in the volume type inner container (7) and an electric control system used for controlling the heating body (3);

the heat exchange device comprises a heat exchanger positioned in the volume type inner container (7) and a first temperature regulating valve (22) positioned outside the volume type inner container (7), the heat exchanger is provided with a cold water inlet connected with a tap water pipe (2) and a hot water outlet connected with a hot water inlet of the first temperature regulating valve (22), the cold water inlet of the first temperature regulating valve (22) is connected with the tap water pipe (2), and a water outlet of the first temperature regulating valve (22) is used for being connected with a small amount of hot water consumption points;

the zero-cold water device comprises a second temperature adjusting valve (11), a cold water inlet (20) of the second temperature adjusting valve is connected with a water outlet pipe (10) of the gas water heater, a hot water inlet (19) of the second temperature adjusting valve is connected with a hot water outlet (18) of the volume type inner container, a water outlet (21) of the second temperature adjusting valve is used for being connected with a large amount of hot water using points, and the temperature of water in the volume type inner container (7) is higher than the water outlet temperature of the second temperature adjusting valve (11).

2. The double water outlet electric water heater according to claim 1, wherein the heat exchanger is a coil heat exchanger (8).

3. The dual effluent electric water heater according to claim 2, wherein the surface area of the coil heat exchanger (8) is greater than or equal to 0.25 square meters.

4. The double-water-outlet electric water heater according to claim 1, wherein a second three-way pipe is arranged in the water heater, a first pipe orifice of the second three-way pipe is connected with a water outlet pipe (10) of the gas water heater, a second pipe orifice of the second three-way pipe is connected with a cold water inlet (20) of the second temperature regulating valve, and a third pipe orifice of the second three-way pipe is connected with a cold water inlet of the positive displacement inner container.

5. The double-outlet electric water heater according to claim 4, wherein a second tee is arranged in the water heater, a first pipe orifice of the second tee is connected with the tap water pipe (2), a second pipe orifice of the second tee is connected with the cold water inlet of the first temperature regulating valve (22), and a third pipe orifice of the second tee is connected with the cold water inlet of the heat exchanger.

6. The double-outlet electric water heater according to claim 1, wherein a polyurethane foam insulation layer is arranged outside the volume type inner container (7).

7. The double-water-outlet electric water heater according to claim 1, wherein the electric control system comprises a regulating component (6) and a temperature sensor (5) located in the positive displacement inner container (7), the temperature sensor (5) is electrically connected with the regulating component (6), the regulating component (6) is electrically connected with the heating body (3), and when the temperature sensed by the temperature sensor (5) is lower than a preset temperature, the regulating component (6) controls the heating body (3) to heat.

8. The double-outlet electric water heater according to claim 5, further comprising a housing (1), wherein the housing (1) is provided with a first cold water inlet (14), a second cold water inlet (16), a first hot water outlet (15) and a second hot water outlet (17), the first cold water inlet (14) is connected to the outlet pipe (10) of the gas water heater and the first pipe orifice of the second tee pipe, the second cold water inlet (16) is connected to the tap water pipe (2) and the water inlet of the heat exchanger, the first hot water outlet (15) is connected to the water outlet (21) of the second thermostatic valve and the large quantity of hot water consumption points, and the second hot water outlet (17) is connected to the water outlet of the first thermostatic valve (22) and the small quantity of hot water consumption points.

9. The double-outlet electric water heater according to claim 7, wherein the electric control system further comprises a temperature adjusting knob and a temperature display component, and both the temperature adjusting knob and the temperature display component are electrically connected with the regulating and controlling assembly (6).

10. The double-outlet electric water heater according to claim 1, wherein the heating body (3) is an electric heating rod.