Gas water heater

Abstract

The utility model discloses a gas water heater which comprises a water inlet pipe, a water outlet pipe, a gas heat exchanger and an electric heating module. In the first water using mode, a first communicating channel is formed between the water inlet pipe and the water outlet pipe, and the first communicating channel flows through the electric heating module; the electric heating module is used for heating water in the first communication passage; in the second water using mode, a second communication channel is formed between the water inlet pipe and the water outlet pipe, and the second communication channel flows through the gas heat exchanger; and the gas heat exchanger is used for heating water in the second communication passage. The utility model provides a gas water heater to solve the problems that in the prior art, noise generated by a gas water heater in the state of guaranteeing advanced heating and rapid hot water discharging is large, and the use experience of a user is seriously affected.

Description

Technical Field

[0001] The utility model belongs to the technical field of household appliances, and specifically relates to a gas water heater. Background Art

[0002] The gas water heaters commonly used in the market currently use gas as fuel, and heat the cold water flowing through the heat exchanger through the gas combustion to achieve the purpose of preparing hot water.

[0003] When users use water in the kitchen, existing gas water heaters generate noise during ignition, combustion, valve opening, and closing, resulting in a poor user experience. To address the slow heating problem, existing gas water heaters incorporate internal circulating water pumps to preheat the water before users use it. However, this approach fails to reduce noise and increases energy consumption.

[0004] At the same time, in order to ensure the user experience, it is also necessary to solve the problem of secondary boiling water and cold scalding water.

[0005] Therefore, developing a gas water heater that can ensure rapid hot water output when using water in the kitchen, greatly reducing the working noise of the gas water heater, and bringing users a better user experience is a technical problem that needs to be solved urgently. Utility Model Content

[0006] The utility model aims to solve the problem that gas water heaters in the prior art generate loud noises while ensuring early heating and rapid hot water output, which seriously affects the user experience, and provides a gas water heater to solve the above problem.

[0007] In order to achieve the above-mentioned utility model / design purpose, this utility model adopts the following technical solutions:

[0008] A gas water heater comprises a water inlet pipe, a water outlet pipe, a gas heat exchanger and an electric heating module; in a first water use mode, a first communication passage is formed between the water inlet pipe and the water outlet pipe, the first communication passage flows through the electric heating module; the electric heating module is used to heat water in the first communication passage; in a second water use mode, a second communication passage is formed between the water inlet pipe and the water outlet pipe, the second communication passage flows through the gas heat exchanger; the gas heat exchanger is used to heat water in the second communication passage.

[0009] In some embodiments of the present application, when the user stops using water, the gas heat exchanger and the electric heating module are connected through an internal circulation passage; the internal circulation passage includes a fifth connecting pipe, and the fifth connecting pipe is used to connect the gas heat exchanger and the electric heating module to form a loop.

[0010] In some embodiments of the present application, the first connecting passage includes a first connecting pipe, a second connecting pipe and a first valve body assembly, the first valve body assembly is connected to the first connecting pipe, the two ends of the first connecting pipe are respectively connected to the water outlet pipe and the electric heating module, and the two ends of the second connecting pipe are respectively connected to the water inlet pipe and the electric heating module; the first valve body assembly is used to control the opening and closing of the first connecting passage.

[0011] In some embodiments of the present application, the first valve body assembly includes a first pilot valve. When the first pilot valve is in a closed state, the first pilot valve is used to prevent the flow of water from the water inlet pipe to the electric heating module in the first connecting pipe; when the first pilot valve is in an open state, water can flow from the water inlet pipe, through the first connecting pipe, the first pilot valve, the second connecting pipe, and out to the water outlet pipe.

[0012] In some embodiments of the present application, the first valve body assembly includes a two-way shut-off valve.

[0013] In some embodiments of the present application, the first valve body assembly includes two reversely connected second pilot valves and a third pilot valve.

[0014] In some embodiments of the present application, the second connecting passage includes a third connecting pipe, a fourth connecting pipe and a second valve body, the two ends of the third connecting pipe are respectively connected to the water outlet pipe and the gas heat exchanger, the second valve body is connected to the fourth connecting pipe, and the two ends of the fourth connecting pipe are respectively connected to the gas heat exchanger and the water inlet pipe; the second valve body is used to control the opening and closing of the second connecting passage.

[0015] In some embodiments of the present application, the two-way stop valve is connected to the internal circulation passage; the two-way stop valve is used to control the on-off of the internal circulation passage.

[0016] In some embodiments of the present application, the second pilot valve and the third pilot valve are connected to the internal circulation passage; the second pilot valve and the third pilot valve are used to control the on-off of the internal circulation passage.

[0017] In some embodiments of the present application, the internal circulation passage also includes a third valve body assembly, which is connected to the internal circulation passage; the third valve body assembly includes a second one-way valve and a fourth pilot valve, the second one-way valve is used to prevent water from flowing from the water inlet pipe through the fifth connecting pipe to the water outlet pipe, and the fourth pilot valve is used to control the on and off of the internal circulation passage.

[0018] Compared with the prior art, the advantages and positive effects of the present invention are:

[0019] A first communication passage is connected between the water inlet pipe and the water outlet pipe, and an electric heating module is connected to the first communication passage to provide fast and silent hot water output in the first water use mode, thereby reducing noise during the hot water production process while ensuring the hot water output speed;

[0020] A second communication passage is connected between the water inlet pipe and the water outlet pipe, and a gas heat exchanger is connected to the second communication passage, so that a large amount of hot water can be output in the second water use mode.

[0021] After reading the specific embodiments of the present invention in conjunction with the accompanying drawings, other features and advantages of the present invention will become more clear. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0023] Figure 1 This is a structural schematic diagram of an embodiment of a gas water heater proposed by the present utility model;

[0024] Figure 2 This is a structural schematic diagram of another embodiment of a gas water heater proposed by the present utility model;

[0025] Figure 3 This is a structural schematic diagram of another embodiment of a gas water heater proposed by the present utility model;

[0026] In the figure,

[0027] 100, water inlet pipe;

[0028] 110, first stop valve;

[0029] 200, water outlet pipe;

[0030] 210, second stop valve;

[0031] 300, gas heat exchanger;

[0032] 400, electric heating module;

[0033] 511, first connecting pipeline;

[0034] 512, second connecting pipeline;

[0035] 513, two-way stop valve;

[0036] 514, first one-way valve;

[0037] 515, first pilot valve;

[0038] 516, second pilot valve;

[0039] 517, third pilot valve;

[0040] 521, third connecting pipeline;

[0041] 522, fourth connecting pipeline;

[0042] 523, second valve body;

[0043] 531, fifth connecting pipeline;

[0044] 533, second one-way valve;

[0045] 534, fourth pilot valve;

[0046] 600, pump;

[0047] 700, water servo;

[0048] 810, a first temperature measuring device;

[0049] 820, a second temperature measuring device;

[0050] 830, a third temperature measuring device. DETAILED DESCRIPTION

[0051] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0052] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limiting the present invention.

[0053] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections. A person of ordinary skill in the art will understand the specific meanings of the above terms in the present invention in specific circumstances. In the description of the embodiments, specific features, structures, materials, or characteristics may be combined in any appropriate manner in any one or more embodiments or examples.

[0054] The terms "first" and "second" are used for descriptive purposes only and should not be understood to indicate or imply relative importance or implicitly specify the quantity of the technical features indicated. Therefore, a feature specified as "first" or "second" may explicitly or implicitly include one or more of the features.

[0055] In the description of the present invention, unless otherwise specified, “a plurality of” means two or more.

[0056] Existing gas water heaters often feature a "zero cold water" function. This involves adding a circulating water pump to the heater. Before each use, users must manually activate the "zero cold water" function, which starts the process and heats the water in the waterway. While this design achieves instant hot water, users must wait for a while before using the water. Furthermore, the "zero cold water" technology doesn't reduce noise.

[0057] Some embodiments of the present application relate to a gas water heater that heats cold water using a combination of electric and gas heating. This allows for rapid hot water delivery and reduced operating noise during kitchen water use by switching between electric and gas heating without requiring pre-start.

[0058] In some embodiments of the present application, a first water use mode and a second water use mode are included.

[0059] In the first water use mode, the user's water consumption is not large, and the user frequently turns the water on and off during use. The user hopes to get hot water quickly and without loud noise during use.

[0060] The first water use mode usually includes a kitchen water use scenario. Therefore, in order to meet the effects of quickly outputting hot water and reducing noise in the first water use mode, electric heating can be used for heating.

[0061] In the second water use mode, usually the non-kitchen mode, the commonly used scenario is the bathroom shower mode. In this state, the water consumption is large and the water use time is long. Therefore, gas heating can be used for heating in the non-kitchen mode.

[0062] When water is stopped, in order to prevent the occurrence of scalding water, the electric heating pipeline is connected to the gas heating pipeline, thereby preventing the scalding water phenomenon caused by gas heating.

[0063] In some embodiments of the present application, the gas water heater includes a water inlet pipe 100 , a water outlet pipe 200 , a gas heat exchanger 300 and an electric heating module 400 .

[0064] In some embodiments of the present application, the first water use mode is mostly used to meet the need to quickly output hot water and reduce noise when frequently turned on and off. For example, the first water use mode includes a kitchen water use mode.

[0065] In some embodiments of the present application, in a first water use mode, in particular, in a kitchen water use mode, a first connecting passage is formed between the water inlet pipe 100 and the water outlet pipe 200, and the electric heating module 400 is connected to the first connecting passage. The electric heating module 400 heats the water in the first connecting passage so that the user can heat the water in the kitchen water use mode.

[0066] Since the electric heating module 400 generates less noise during use, silent heating can be achieved. Therefore, in the first water use mode, the electric heating module 400 is used for heating, which can not only ensure rapid water output but also achieve silent heating, thereby ensuring the user experience.

[0067] In some embodiments of the present application, the second water use mode generally includes a non-kitchen water use mode, and the non-kitchen water use mode generally includes a shower mode.

[0068] In some embodiments of the present application, in the second water use mode, in particular, in the non-kitchen water use mode, a second communication passage is formed between the water inlet pipe 100 and the water outlet pipe 200, and the gas heat exchanger 300 is connected to the second communication passage. The gas heat exchanger 300 heats the water in the second communication passage so that the user can heat the water in the non-kitchen water use mode.

[0069] In the non-kitchen state, water is generally mainly used for showering, which consumes a large amount of water. Since the gas heat exchanger 300 generates a large amount of hot water during use, it can provide an ample supply of hot water. Therefore, in the non-kitchen water state, the gas heat exchanger 300 is used for heating to ensure an adequate supply of hot water.

[0070] In some embodiments of the present application, when the user stops using water, the gas heat exchanger 300 and the electric heating module 400 are connected in the internal circulation path.

[0071] The gas heat exchanger 300 is connected to the electric heating module 400 through an internal circulation passage.

[0072] When the user finishes using water, the water in the pipeline connected to the gas heat exchanger 300 is mixed with the water in the pipeline connected to the electric heating module 400, thereby avoiding the occurrence of cold or scalding water.

[0073] In some embodiments of the present application, the first communication passage includes a first connecting line 511 , a second connecting line 512 and a first valve body assembly.

[0074] The first valve body assembly is used to control the opening and closing of the first communication passage.

[0075] Specifically, the first valve body assembly is connected to the first connecting pipeline 511 .

[0076] Both ends of the first connecting pipe 511 are connected to the water outlet pipe 200 and the electric heating module 400 respectively.

[0077] Both ends of the second connecting pipe 512 are connected to the water inlet pipe 100 and the electric heating module 400 respectively.

[0078] The first connecting pipe 511 and the second connecting pipe 512 are used to connect the electric heating module 400 to the water outlet pipe 200 and the water inlet pipe 100 respectively.

[0079] Thus, cold water enters the electric heating module 400 through the water inlet pipe 100 and the second connecting pipe 512 , is heated by the electric heating module 400 , and flows out through the first connecting pipe 511 and the water outlet pipe 200 for use by users.

[0080] Since the first valve body assembly is connected to the first connecting pipeline 511 , the first valve body assembly can control the opening and closing of the first communication passage by controlling the opening and closing of the first connecting pipeline 511 .

[0081] In some embodiments of the present application, Figure 2 As shown, the first valve body assembly includes a two-way stop valve 513. The two-way stop valve 513 is connected to the first connecting pipeline 511 and is used to control the on-off of the first connecting pipeline 511, thereby controlling the on-off of the first communication passage.

[0082] When the two-way stop valve 513 is in a closed state, the first communication passage is in a disconnected state, and the electric heating module 400 does not work.

[0083] When the two-way stop valve 513 is in an open state, the first communication passage is in a connected state, and the electric heating module 400 is working.

[0084] In some other embodiments of the present application, Figure 1As shown, the first valve body assembly includes a first one-way valve 514 and a first pilot valve 515. The first one-way valve 514 and the first pilot valve 515 are connected in the first connecting pipe 511. The first pilot valve 515 is used to control the on-off of the first connecting pipe 511. The first one-way valve 514 is used to prevent water from flowing from the water outlet pipe 200 through the first connecting pipe 511 toward the water inlet pipe 100. The installation direction of the first one-way valve 514 can ensure that water can flow from the water inlet pipe 100 through the first connecting pipe 511, the electric heating module 400, and the second connecting pipe 512 to the water outlet pipe 200.

[0085] When the first pilot valve 515 is open, water can flow through the water inlet pipe 100 , the second connecting pipe 512 , the electric heating module 400 , the first connecting pipe 511 to the water outlet pipe 200 .

[0086] As a result, the water heated in the first communicating passage connected to the electric heating module 400 flows out through the water outlet pipe 200 for use by the user in the kitchen water state, achieving silent heating and rapid water output to meet the user's use in the kitchen water state.

[0087] In some other embodiments of the present application, Figure 3 As shown, the first valve body assembly includes a second pilot valve 516 and a third pilot valve 517. The second pilot valve 516 and the third pilot valve 517 are reversely connected.

[0088] The second pilot valve 516 and the third pilot valve 517 jointly control the opening and closing of the first communication passage.

[0089] The second pilot valve 516 and the third pilot valve 517 are closed simultaneously, and the first communication passage is disconnected.

[0090] Since the pilot valve may be unidirectionally connected when the unidirectional flow is large, in order to ensure that the first communication passage can be in a stable closed state, the second pilot valve 516 and the third pilot valve 517 are reversely connected.

[0091] The second pilot valve 516 and the third pilot valve 517 are opened simultaneously, and the first communication passage is communicated.

[0092] In some embodiments of the present application, the second communication passage includes a third connecting line 521 and a fourth connecting line 522 .

[0093] The third connecting pipe 521 and the fourth connecting pipe 522 are used to connect the gas heat exchanger 300 between the water inlet pipe 100 and the water outlet pipe 200 .

[0094] Specifically, both ends of the third connecting pipe 521 are connected to the gas heat exchanger 300 and the water outlet pipe 200 respectively.

[0095] Specifically, two ends of the fourth connecting pipe 522 are connected to the gas heat exchanger 300 and the water inlet pipe 100 respectively.

[0096] A second valve body 523 is connected to the fourth connecting pipeline 522 , and the second valve body 523 is used to control the opening and closing of the second communication passage.

[0097] In the non-kitchen state, the gas heat exchanger 300 is used to heat the cold water in the second communication passage. The gas heat exchanger 300 can ensure that there is sufficient hot water output in the second communication passage to meet the needs of users in non-kitchen states such as showering.

[0098] In some embodiments of the present application, the first and second communication passages are connected in parallel between the water inlet pipe 100 and the water outlet pipe 200. When the first communication passage is connected, the electric heating module 400 is in operation, thereby achieving a kitchen water state; when the second communication passage is connected, the gas heat exchanger 300 is in operation, thereby achieving a non-kitchen water state.

[0099] A first stop valve 110 is connected to the water inlet pipe 100 .

[0100] A second shut-off valve 210 is connected to the water outlet pipe 200 .

[0101] In some embodiments of the present application, Figure 2 As shown, the first connecting line 511 and the third connecting line 521 are both connected to the water outlet pipe 200, and the two-way stop valve 513 is connected to the first connecting line 511. The second connecting line 512 and the fourth connecting line 522 are both connected to the water inlet pipe 100. The second valve body is connected to the fourth connecting line 522.

[0102] In some embodiments of the present application, Figure 2 As shown, the first and second connecting passages are connected in parallel between the water inlet pipe 100 and the water outlet pipe 200. The first and second stop valves 110 and 210 are both closed, and the two-way stop valve 513 and the second valve body are open. At this point, the first and third connecting lines 511 and 521 are disconnected from the water outlet pipe 200, and the second and fourth connecting lines 512 and 522 are disconnected from the water inlet pipe 100. The first, second, and fifth connecting lines 511, 512, and 531 connect the gas heat exchanger 300 and the electric heating module 400 to form an internal circulation path. The first, second, third, and fourth connecting lines 511, 512, 521, and 531 connect the gas heat exchanger 300 and the electric heating module 400 to form an internal circulation path. This ensures internal circulation when the user has finished using water, preventing the occurrence of scalding.

[0103] In other embodiments of the present application, Figure 3 As shown, the first and second connecting passages are connected in parallel between the water inlet pipe 100 and the water outlet pipe 200. The first and second stop valves 110 and 210 are both closed, and the second pilot valve 516, the third pilot valve 517, and the second valve body are open. At this point, the first and third connecting pipes 511, 521 are disconnected from the water outlet pipe 200, and the second and fourth connecting pipes 512, 522 are disconnected from the water inlet pipe 100. The first, second, and third connecting pipes 511, 512, and 521 connect the gas heat exchanger 300 and the electric heating module 400, forming an internal circulation passage. The first, second, third, and fourth connecting pipes 511, 512, 521, and 522 connect the gas heat exchanger 300 and the electric heating module 400, forming an internal circulation passage. This ensures internal circulation when the user has finished using water, preventing the occurrence of scalding.

[0104] In some embodiments of the present application, Figure 2 、 Figure 3 As shown, a first temperature measuring device 810 is connected to the water inlet pipe 100 , and the first temperature measuring device 810 is used to measure the temperature of the water flow in the water inlet pipe 100 .

[0105] In some embodiments of the present application, Figure 2 、 Figure 3 As shown, a third temperature measuring device 830 is connected to the water outlet pipe 200 , and the third temperature measuring device 830 is used to measure the temperature of the water flow in the water outlet pipe 200 .

[0106] In some embodiments of the present application, Figure 2 、 Figure 3 As shown, a second temperature measuring device 820 is connected to the fourth connecting pipe 522 , and the second temperature measuring device 820 is used to measure the temperature of the water flow in the side beam water outlet pipe 200 .

[0107] In some embodiments of the present application, Figure 1 As shown, a first pilot valve 515 and a first check valve 514 are connected to the first connecting line 511 .

[0108] In some other embodiments of the present application, only the first pilot valve 515 is connected to the first connecting pipe 511. When the first pilot valve 515 is closed, a high-flow direction is provided. In the first connecting pipe 511, the high-flow direction of the first pilot valve 515 is from the outlet pipe 200 to the inlet pipe 100. However, in the first connecting pipe 511, water does not flow from the outlet pipe 200 to the inlet pipe 100. Therefore, in the absence of a high-flow water impact, the first pilot valve 515 is closed and can stably cut off the water flow in the first connecting pipe 511. When the first pilot valve 515 is open, the first connecting pipe 511 is open from the inlet pipe 100 to the outlet pipe 200.

[0109] However, in addition to the first pilot valve 515, the first connecting pipe 511 is also connected to a first one-way valve 514. Along the direction from the water inlet pipe 100 to the water outlet pipe 200, when the first one-way valve 514 is in the open state, the first one-way valve 514 can be turned on, and along the direction from the water outlet pipe 200 to the water inlet pipe 100, the passage in this direction can be blocked by the first one-way valve 514.

[0110] In some embodiments of the present application, Figure 1 As shown, a pump 600 and a water servo 700 are connected to the second communicating pipe, and the pump 600 is used to drive the water to flow in the inner circulation passage.

[0111] Specifically, the pump 600 can drive the water to flow in the inner circulation path in a counterclockwise direction. However, the first pilot valve 515 and the first check valve 514 in the first connecting pipe 511 can pass the water flow direction, so a separate water flow path needs to be set for the inner circulation path.

[0112] In some embodiments of the present application, the internal circulation passage includes a fifth connecting pipe 531 , and the fifth connecting pipe 531 is used to connect the gas heat exchanger 300 and the electric heating module 400 to form a loop.

[0113] like Figure 1 As shown, both ends of the fifth connecting pipe 531 and both ends of the fourth connecting pipe 522 are connected to the gas heat exchanger 300 and the electric heating module 400 to form a loop.

[0114] In some other embodiments, the internal circulation path further includes a sixth connecting pipeline. The ends of the fifth connecting pipeline 531 and the sixth connecting pipeline are respectively connected to the gas heat exchanger 300 and the electric heating module 400 to form a loop.

[0115] like Figure 1As shown, a third valve assembly is connected to the fifth connecting pipeline 531. The third valve assembly is connected to the inner circulation passage and includes a second one-way valve 533 and a fourth pilot valve 534.

[0116] When the fourth pilot valve 534 is in the closed state, the fourth pilot valve 534 can completely block the water flow in the internal circulation passage driven by the water pump.

[0117] The second one-way valve 533 can allow the water flow driven by the pump 600 to flow in the fifth connecting pipe 531 and the sixth connecting pipe.

[0118] The second one-way valve 533 can block the flow of water in the fifth connecting pipe 531 and the sixth connecting pipe in the opposite direction of the water flow driven by the pump 600 .

[0119] In some embodiments of the present application, the second one-way valve 533 can also prevent the first stop valve and the second stop valve from being in an open state, and the water flow with higher pressure passes through the electric heating module 400, along the fifth connecting line 531, and flows into the third connecting line 521 through the fourth pilot valve 534.

[0120] Therefore, if Figure 1 As shown, a second one-way valve 533 and a fourth pilot valve 534 are connected in the fifth connecting pipeline 531, which is connected to the electric heating module 400 and the gas heat exchanger 300 with the fourth connecting pipeline 522 to realize the connection of the internal circulation path to prevent the generation of cold and scalding water.

[0121] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.

Claims

1. A gas water heater, characterized in that: include: water inlet pipe; outlet pipe; Gas heat exchanger; Electric heating module; In the first water use mode, a first communication passage is formed between the water inlet pipe and the water outlet pipe, and the first communication passage flows through the electric heating module; The electric heating module is used to heat the water in the first communication passage; In the second water use mode, a second communication passage is formed between the water inlet pipe and the water outlet pipe, and the second communication passage flows through the gas heat exchanger; the gas heat exchanger is used to heat water in the second communication passage.

2. The gas water heater according to claim 1, characterized in that: When the user stops using water, the gas heat exchanger is connected to the electric heating module through an internal circulation passage; the internal circulation passage includes a fifth connecting pipe, and the fifth connecting pipe is used to connect the gas heat exchanger and the electric heating module to form a loop.

3. The gas water heater according to claim 2, characterized in that: The first connecting passage includes a first connecting pipe, a second connecting pipe and a first valve body assembly. The first valve body assembly is connected to the first connecting pipe. The two ends of the first connecting pipe are respectively connected to the water outlet pipe and the electric heating module. The two ends of the second connecting pipe are respectively connected to the water inlet pipe and the electric heating module. The first valve body assembly is used to control the opening and closing of the first connecting passage.

4. The gas water heater according to claim 3, characterized in that: The first valve body assembly includes a first pilot valve. When the first pilot valve is in a closed state, the first pilot valve is used to prevent the flow of water from the water inlet pipe to the electric heating module in the first connecting pipeline; When the first pilot valve is in an open state, water can flow from the water inlet pipe, through the first connecting pipe, the first pilot valve, the second connecting pipe, and out to the water outlet pipe.

5. The gas water heater according to claim 3, characterized in that: The first valve body assembly includes a two-way shut-off valve.

6. The gas water heater according to claim 3, characterized in that: The first valve body assembly includes a second pilot valve and a third pilot valve that are connected in reverse.

7. The gas water heater according to claim 1, characterized in that The second connecting passage includes a third connecting pipe, a fourth connecting pipe and a second valve body. The two ends of the third connecting pipe are respectively connected to the water outlet pipe and the gas heat exchanger. The second valve body is connected to the fourth connecting pipe. The two ends of the fourth connecting pipe are respectively connected to the gas heat exchanger and the water inlet pipe. The second valve body is used to control the opening and closing of the second connecting passage.

8. The gas water heater according to claim 5, characterized in that: The two-way stop valve is connected to the internal circulation passage; the two-way stop valve is used to control the on-off of the internal circulation passage.

9. The gas water heater according to claim 6, characterized in that: The second pilot valve and the third pilot valve are connected to the internal circulation passage; the second pilot valve and the third pilot valve are used to control the on-off of the internal circulation passage.

10. The gas water heater according to claim 2, characterized in that: The internal circulation passage also includes a third valve body assembly, which is connected to the internal circulation passage; the third valve body assembly includes a second one-way valve and a fourth pilot valve, the second one-way valve is used to prevent water from flowing from the water inlet pipe through the fifth connecting pipe to the water outlet pipe, and the fourth pilot valve is used to control the on and off of the internal circulation passage.

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