Gas water heater

Abstract

A gas water heater (100), comprising: a main body (10), the main body (10) being provided with a gas path system and a water path system; and a fan-water pump assembly (20), mounted on the main body (10), wherein the fan-water pump assembly (20) comprises a driving device (21), and a fan assembly (22) and a water pump assembly (23) which are separately drivingly connected to the driving device (21); an air inlet (2211) of the fan assembly (22) is connected to the gas path system; the water pump assembly (23) is connected to the water path system; the driving device (21) is used for controlling the fan assembly (22) to operate, so that the fan assembly (22) drives a gas flow to flow into the fan assembly (22) along the gas path system and to be discharged from an air outlet (2212) of the fan assembly (22); the driving device (21) is further used for controlling the water pump assembly (23) to operate, so that the water pump assembly (23) drives a water flow to flow along the water path system. For the gas water heater (100), the cost of the gas water heater can be reduced, the size of the whole machine can be reduced, and the assembly efficiency of the whole machine can be improved.

Description

Gas water heating device

[0001] Related application

[0002] The present application claims priority to Chinese Patent Application No. 202411238790.7, filed on September 3, 2024, the contents of which are incorporated herein by reference in its entirety. TECHNICAL FIELD

[0003] The present application relates to the technical field of water heating device, in particular to a gas water heating device. BACKGROUND

[0004] In related technologies, some gas water heating devices are usually provided with a fan and a water pump. However, the fan and the water pump are usually independently arranged, and a set of driving devices needs to be configured respectively, resulting in high cost of the gas water heating device; and the fan and the water pump are arranged in a split manner, so that the overall structure is not compact enough, and a large installation space is occupied, resulting in large size of the gas water heating device; in addition, the fan and the water pump need to be installed on the main body of the gas water heating device in steps, resulting in low assembly efficiency of the gas water heating device. SUMMARY

[0005] The main purpose of the present application is to provide a gas water heating device, which aims to reduce the cost of the gas water heating device, reduce the size of the whole machine, and improve the assembly efficiency of the whole machine.

[0006] To achieve the above-mentioned purpose, the gas water heating device provided by the present application comprises a main body and a fan and water pump assembly.

[0007] In an embodiment, the main body has a gas path system and a water path system.

[0008] In an embodiment, the fan and water pump assembly is installed on the main body, and the fan and water pump assembly comprises a driving device and a fan assembly and a water pump assembly respectively drivingly connected with the driving device, an air inlet of the fan assembly is communicated with the gas path system, the water pump assembly is communicated with the water path system, the driving device is used for controlling the fan assembly to operate, so that the fan assembly drives airflow to flow into the fan assembly along the gas path system and is discharged from an air outlet of the fan assembly, and the driving device is also used for controlling the water pump assembly to operate, so that the water pump assembly drives water flow to flow along the water path system.

[0009] In an embodiment, the main body comprises a burner, a combustion chamber box body and a heat exchanger arranged in sequence, a combustion chamber is formed inside the combustion chamber box body, a side wall of the combustion chamber is provided with an air inlet hole, a gas passage of the burner, the combustion chamber and a flue gas passage of the heat exchanger are communicated in sequence to form the gas path system, and the fan and water pump assembly is arranged on a side of the heat exchanger away from the combustion chamber box body.

[0010] In an embodiment, the combustor, the combustion chamber box and the heat exchanger are sequentially arranged from bottom to top, the main body further comprises a fume hood arranged on top of the heat exchanger, the air path system further comprises a fume collecting cavity formed in the fume hood, and the fan assembly is installed on the fume hood, and the air inlet of the fan assembly is communicated with the fume collecting cavity.

[0011] In an embodiment, the main body further comprises a water inlet pipeline and a water outlet pipeline, the water inlet pipeline is communicated with the water inlet port of the heat exchanger, the water outlet pipeline is communicated with the water outlet port of the heat exchanger, the water inlet pipeline, the heat exchanger and the water outlet pipeline are sequentially communicated to form the water path system, and the water pump assembly is arranged on the water inlet pipeline or the water outlet pipeline.

[0012] In an embodiment, the water inlet pipeline comprises a water inlet connector, a first water inlet pipeline and a second water inlet pipeline, the water inlet connector is communicated with the water inlet port of the water pump assembly through the first water inlet pipeline, and the water outlet port of the water pump assembly is communicated with the water inlet port of the heat exchanger through the second water inlet pipeline.

[0013] Alternatively, the water outlet pipeline comprises a water outlet connector, a first water outlet pipeline and a second water outlet pipeline, the water outlet port of the heat exchanger is communicated with the water inlet port of the water pump assembly through the first water outlet pipeline, and the water outlet port of the water pump assembly is communicated with the water outlet connector through the second water outlet pipeline.

[0014] In an embodiment, the gas water heating device further comprises a second water pump arranged on the water inlet pipeline, the second water pump is arranged in series with the water pump assembly, and the second water pump is configured to selectively operate together with the water pump assembly to pressurize the water path system.

[0015] In an embodiment, the water outlet end of the water outlet pipeline is communicated with the water inlet pipeline, so that the water inlet pipeline, the heat exchanger and the water outlet pipeline are sequentially communicated to form a zero-cold-water circulation loop, and the second water pump and the water pump assembly are further used to drive water flow to circulate along the zero-cold-water circulation loop.

[0016] In an embodiment, the water inlet port of the water pump assembly is arranged higher than the top of the heat exchanger, and / or the water outlet port of the water pump assembly is arranged higher than the top of the heat exchanger.

[0017] In an embodiment, the fan assembly comprises a volute and a fan wheel arranged in the volute, the volute having the air inlet and the air outlet, the water pump assembly comprises a pump shell and a pump wheel arranged in the pump shell, the pump shell having a water inlet and a water outlet, the volute and the pump shell are arranged on opposite sides of the driving device respectively, the driving device has a first output end and a second output end for torque output, the first output end is drivingly connected with the fan wheel, and the second output end is drivingly connected with the pump wheel.

[0018] In an embodiment, the volute and the pump shell are arranged on opposite sides of the driving device along an axial direction of the fan wheel, the air inlet is arranged on a side of the volute away from the driving device, and the axial direction of the fan wheel is consistent with a width direction or a thickness direction of the main body.

[0019] Alternatively, the first output end and the second output end are configured to be capable of synchronously outputting torque so as to synchronously rotate the fan wheel and the pump wheel.

[0020] Alternatively, the first output end and the second output end are configured to be capable of independently outputting torque so as to independently rotate the fan wheel and the pump wheel.

[0021] In an embodiment, the driving device comprises a rotor, a stator and an output shaft, the rotor is sleeved on the periphery of the output shaft and can drive the output shaft to rotate together, two ends of the output shaft form the first output end and the second output end respectively, the fan wheel and the pump wheel are connected to the two ends of the output shaft respectively, and the stator is sleeved on the periphery of the rotor and forms a magnetic circuit with the rotor to drive the rotor to rotate.

[0022] Alternatively, the driving device comprises a stator, a first rotor and a second rotor, the first rotor is drivingly connected with the fan wheel as the first output end, the second rotor is drivingly connected with the pump wheel as the second output end, and the stator forms a magnetic circuit with the first rotor and the second rotor respectively to drive the first rotor and the second rotor to rotate respectively.

[0023] The technical scheme of the present application is characterized in that a fan water pump assembly is installed on the main body of the gas water heating equipment, the fan assembly of the fan water pump assembly is communicated with the gas path system of the main body, the water pump assembly of the fan water pump assembly is communicated with the water path system of the main body, and the fan assembly and the water pump assembly share a set of driving devices for driving control. When the gas water heating equipment is working, the fan assembly is controlled to operate by the driving device, so that the airflow is driven to flow along the gas path system and is discharged from the air outlet of the fan assembly by the fan assembly, realizing the function of the fan; the water pump assembly is controlled to operate by the driving device, so that the water pump function is realized. In this way, only one set of driving device needs to be configured to realize the functions of the fan and the water pump, which can reduce the cost of the gas water heating equipment; and the integration of the fan water pump assembly is higher, the number of driving devices is reduced, the internal installation space of the gas water heating equipment can be saved, which is beneficial to reducing the volume of the gas water heating equipment and making more installation space inside the gas water heating equipment available for installation of other expansion function modules. When assembling the gas water heating equipment, the fan water pump assembly only needs to be installed on the main body once, which can simplify the installation steps and improve the assembly efficiency of the gas water heating equipment. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the basis of the drawings shown.

[0025] Fig. 1 is a structural schematic diagram of a first embodiment of the gas water heating equipment provided by the present application;

[0026] Fig. 2 is a structural schematic diagram of a second embodiment of the gas water heating equipment provided by the present application;

[0027] Fig. 3 is a structural schematic diagram of a third embodiment of the gas water heating equipment provided by the present application;

[0028] Fig. 4 is a structural schematic diagram of a fourth embodiment of the gas water heating equipment provided by the present application;

[0029] Fig. 5 is a structural schematic diagram of an embodiment of the fan water pump assembly provided by the present application;

[0030] Fig. 6 is an exploded structural schematic diagram of the fan water pump assembly in Fig. 5;

[0031] Fig. 7 is a cross-sectional structural schematic diagram of an embodiment of the fan water pump assembly provided by the present application;

[0032] Fig. 8 is a cross-sectional structural schematic diagram of another embodiment of the fan water pump assembly provided by the present application.

[0033] BRIEF DESCRIPTION OF DRAWINGS

[0034] 100, gas water heating equipment; 10, main body; 11, burner; 12, combustion chamber box; 121, air inlet hole; 13, heat exchanger; 14, smoke hood; 15, water inlet pipeline; 151, water inlet joint; 152, water inlet pipe; 1521, first water inlet pipe; 1522, second water inlet pipe; 16, water outlet pipeline; 161, water outlet joint; 162, water outlet pipe; 1621, first water outlet pipe; 1622, second water outlet pipe; 20, fan and water pump assembly; 21, driving device; 21a, first output end; 21b, second output end; 211, rotor; 211A, first rotor; 211B, second rotor; 212, output shaft; 213, stator; 214, casing; 215, shield cover; 216, fixed shaft; 217, bearing; 22, fan assembly; 221, volute; 2211, air inlet; 2212, air outlet; 222, fan wheel; 23, water pump assembly; 231, pump shell; 2311, water inlet; 2312, water outlet; 232, pump wheel; 30, second water pump.

[0035] The implementation, functional features and advantages of the present application will be further described with reference to the embodiments and the accompanying drawings. Embodiment of the present application

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work belong to the scope of protection of the present application.

[0037] It should be noted that if the present application involves directionality indication (such as up, down, left, right, front, back, etc.), the directionality indication is only used to explain the relative position relationship, movement condition, etc. between the components in a certain posture, if the certain posture changes, the directionality indication also changes accordingly.

[0038] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can be explicitly or implicitly included at least one of the features. In addition, if "and / or" or "and / or" appears throughout the text, it means that the three parallel schemes are included, for example, "A and / or B" includes A scheme, or B scheme, or A and B scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope claimed by the present application.

[0039] In the related art, some gas water heating equipment is usually provided with a fan and a water pump. However, the fan and the water pump are usually independently arranged, and a set of driving device needs to be configured respectively, resulting in high cost of the gas water heating equipment; and the fan and the water pump are arranged in a split manner, the overall structure is not compact, and a large installation space is occupied, resulting in large size of the gas water heating equipment; in addition, the fan and the water pump need to be installed on the main body of the gas water heating equipment in steps, resulting in low assembly efficiency of the gas water heating equipment.

[0040] The present application provides a gas water heating equipment 100, which integrates the fan and the water pump into one, shares a set of driving device 21, can reduce the cost and the overall size of the gas water heating equipment 100, and can improve the assembly efficiency of the whole machine.

[0041] Please refer to FIG. 1 to FIG. 5, in some embodiments of the present application, the gas water heating equipment 100 includes a main body 10 and a fan and water pump assembly 20. The main body 10 has a gas path system and a water path system; the fan and water pump assembly 20 is installed on the main body 10, the fan and water pump assembly 20 includes a driving device 21 and a fan assembly 22 and a water pump assembly 23 drivenly connected with the driving device 21 respectively, the air inlet 2211 of the fan assembly 22 is communicated with the gas path system, the water pump assembly 23 is communicated with the water path system, the driving device 21 is used for controlling the fan assembly 22 to run, so that the fan assembly 22 drives the airflow to flow into the fan assembly 22 along the gas path system and is discharged from the air outlet 2212 of the fan assembly 22, and the driving device 21 is also used for controlling the water pump assembly 23 to run, so that the water pump assembly 23 drives the water flow to flow along the water path system.

[0042] The gas water heating device 100 includes but is not limited to a gas water heater, a gas wall-hanging stove, etc. The main body 10 constitutes the main structure of the gas water heating device 100, and has a gas path system for conveying gas-phase fluid (such as gas and flue gas), and a water path system for conveying liquid-phase fluid (such as water flow). The fan water pump assembly 20 is installed on the main body 10, and the fan water pump assembly 20 integrates the fan assembly 22 and the water pump assembly 23, and the fan assembly 22 and the water pump assembly 23 share a set of driving devices 21 for driving control, so that the fan function and the water pump function can be integrated. The fan assembly 22 is connected to the gas path system, and the fan assembly 22 is controlled to operate by the driving devices 21, so that the gas flow can be driven to flow along the gas path system by the fan assembly 22. The gas water heating device 100 specifically relates to a strong suction type gas water heating device 100, and the air inlet 2211 of the fan assembly 22 is connected to the gas outlet end of the gas path system, so that when the fan assembly 22 operates, the gas flow in the gas path system can be sucked into the fan assembly 22 and discharged from the air outlet 2212 of the fan assembly 22. The water pump assembly 23 can be connected to the water inlet pipeline 15 or the water outlet pipeline 16 of the water path system. The fan assembly 22 and the water pump assembly 23 share a set of driving devices 21, wherein the driving devices 21 can be configured to control the fan assembly 22 and the water pump assembly 23 to operate simultaneously, or the driving devices 21 can be configured to control the fan assembly 22 and the water pump assembly 23 to operate independently of each other, which is not limited here.

[0043] The technical scheme of the present application installs the fan water pump assembly 20 on the main body 10 of the gas water heating device 100, the fan assembly 22 of the fan water pump assembly 20 is connected to the gas path system of the main body 10, the water pump assembly 23 of the fan water pump assembly 20 is connected to the water path system of the main body 10, and the fan assembly 22 and the water pump assembly 23 share a set of driving devices 21 for driving control. When the gas water heating device 100 works, the fan assembly 22 is controlled to operate by the driving devices 21, so that the gas flow can be driven to flow along the gas path system by the fan assembly 22 and discharged from the air outlet 2212 of the fan assembly 22, realizing the fan function; the water pump assembly 23 is controlled to operate by the driving devices 21, so that the water pump function can be realized. In this way, only one set of driving devices 21 is needed to realize the functions of the fan and the water pump, which can reduce the cost of the gas water heating device 100; the integration of the fan water pump assembly 20 is higher, the number of driving devices 21 is reduced, the internal installation space of the gas water heating device 100 can be saved, which is helpful to reduce the volume of the gas water heating device 100 and make more installation space available inside the gas water heating device 100 for installation of other expansion function modules. Moreover, when assembling the gas water heating device 100, the fan water pump assembly 20 only needs to be installed on the main body 10 once, which can simplify the installation steps and improve the assembly efficiency of the gas water heating device 100.

[0044] As shown in FIG. 1, in an embodiment, the main body 10 comprises a burner 11, a combustion chamber box 12 and a heat exchanger 13 arranged in sequence, the combustion chamber box 12 forms a combustion chamber inside, the side wall of the combustion chamber is provided with an air inlet hole 121, the gas passage of the burner 11, the combustion chamber and the flue gas passage of the heat exchanger 13 are communicated in sequence to form the gas path system, and the fan and pump assembly 20 is arranged on the side of the heat exchanger 13 away from the combustion chamber box 12.

[0045] In the embodiment, the gas water heating device 100 specifically relates to a strong suction type gas water heating device 100, for example, a strong suction type gas water heater. The gas water heating device 100 comprises a burner 11, a combustion chamber box 12 and a heat exchanger 13 arranged in sequence. For example, the burner 11, the combustion chamber box 12 and the heat exchanger 13 can be arranged in sequence from bottom to top along the height direction of the main body 10. Alternatively, the burner 11, the combustion chamber box 12 and the heat exchanger 13 can also be arranged in sequence from top to bottom along the height direction of the main body 10 to form a gas water heating device 100 with an inverted combustion system. The burner 11 has a gas passage for conveying combustion gas (including gas and air), the combustion chamber box 12 is internally configured with a through-going combustion chamber, the heat exchanger 13 can comprise two opposite end plates and a heat exchange body arranged between the two end plates, the heat exchange body can comprise heat exchange pipes and fin groups sleeved on the periphery of the heat exchange pipes, the flue gas passage is formed between the two end plates for flue gas to pass through, and the water flow passage is formed in the heat exchange pipes for water flow to pass through. The gas passage of the burner 11, the combustion chamber of the combustion chamber box 12 and the flue gas passage of the heat exchanger 13 are communicated in sequence to form a gas path system. When the gas water heating device 100 is working, the gas and air can be conveyed to the burner 11 by the gas passage, the high-temperature flue gas generated by ignition and combustion of the burner 11 flows along the combustion chamber towards the heat exchanger 13, and the flue gas passes through the flue gas passage of the heat exchanger 13 to heat the water flow in the heat exchanger 13. The fan assembly 22 has an air inlet 2211 and an air outlet 2212, the air inlet 2211 of the fan assembly 22 is communicated with the gas outlet end of the gas path system, when the fan assembly 22 is running, a negative pressure is formed in the combustion chamber, the outside air can enter the combustion chamber through the air inlet hole 121 of the combustion chamber box 12 to provide the air required for combustion, and the high-temperature flue gas generated by the burner 11 can be driven to flow along the gas path system to exchange heat with the heat exchanger 13, so as to improve the heat exchange efficiency, and the flue gas after heat exchange is finally discharged by the air outlet 2212 of the fan assembly 22.

[0046] As shown in FIG. 1, in an embodiment, the combustor 11, the combustion chamber box 12 and the heat exchanger 13 are arranged in sequence from bottom to top, the main body 10 further comprises a fume hood 14 arranged on the top of the heat exchanger 13, and the air path system further comprises a fume collecting cavity formed in the fume hood 14, the fan assembly 22 is installed on the fume hood 14, and the air inlet 2211 of the fan assembly 22 is communicated with the fume collecting cavity.

[0047] In the embodiment, the combustor 11, the combustion chamber box 12, the heat exchanger 13 and the fume hood 14 are arranged in sequence from bottom to top, the fan water pump assembly 20 and the fume hood 14 are arranged side by side on the top of the heat exchanger 13, and the fan assembly 22 of the fan water pump assembly 20 can be used as a strong exhaust fan to realize the exhaust function. When the gas water heater 100 is working, the driving device 21 of the fan water pump assembly 20 drives the fan assembly 22 to operate, so as to provide sufficient air for gas combustion, and drive the high-temperature flue gas generated by the combustion of the combustor 11 to flow along the combustion chamber box 12 towards the heat exchanger 13 to exchange heat with the heat exchanger 13. The flue gas after heat exchange is collected in the fume collecting cavity of the fume hood 14, and then flows into the fan assembly 22, and is discharged from the air outlet 2212 of the fan assembly 22.

[0048] As shown in FIGS. 1 to 4, in some embodiments, the main body 10 further comprises a water inlet pipeline 15 and a water outlet pipeline 16, the water inlet pipeline 15 is communicated with the water inlet port of the heat exchanger 13, the water outlet pipeline 16 is communicated with the water outlet port of the heat exchanger 13, the water inlet pipeline 15, the heat exchanger 13 and the water outlet pipeline 16 are sequentially communicated to form the water path system, and the water pump assembly 23 is arranged on the water inlet pipeline 15 or the water outlet pipeline 16.

[0049] In the embodiment, the heat exchanger 13 has a water inlet port for inputting cold water and a water outlet port for outputting hot water, wherein the water inlet port and the water outlet port can be arranged on opposite sides of the heat exchanger 13 respectively, or the water inlet port and the water outlet port can be arranged on the same side of the heat exchanger 13. The water inlet pipeline 15, the heat exchanger 13 and the water outlet pipeline 16 are sequentially communicated to form the water path system. When the gas water heater 100 is working, the driving device 21 of the fan water pump assembly 20 drives the water pump assembly 23 to operate, so that the external cold water can be transported into the heat exchanger 13 through the water inlet pipeline 15 for heating, and the hot water after heating can be output through the water outlet pipeline 16 to provide hot water for users. The water pump assembly 23 can be connected in series on the water inlet pipeline 15, or can be connected in series on the water outlet pipeline 16, so as to play a role of pressurizing the water path system. When the water pump assembly 23 is arranged on the water inlet pipeline 15, the cold water passing through the water pump assembly 23 can also cool the heat generating components (such as motor, circuit board, etc.) of the driving device 21 of the fan water pump assembly 20, thereby prolonging the service life of the fan water pump assembly 20.

[0050] The following examples are provided for several installation scenarios of the fan water pump assembly 20.

[0051] As shown in FIG. 1 and FIG. 5, in an embodiment, the water inlet pipeline 15 includes a water inlet joint 151, a first water inlet pipe 1521, and a second water inlet pipe 1522. The water inlet joint 151 is connected to the water inlet port 2311 of the water pump assembly 23 via the first water inlet pipe 1521, and the water outlet port 2312 of the water pump assembly 23 is connected to the water inlet port of the heat exchanger 13 via the second water inlet pipe 1522.

[0052] In the present embodiment, the water inlet pipeline 15 includes a water inlet joint 151 and a water inlet pipe 152, which can include a first water inlet pipe 1521 and a second water inlet pipe 1522. The water pump assembly 23 is connected in series between the first water inlet pipe 1521 and the second water inlet pipe 1522. When the water pump assembly 23 of the fan water pump assembly 20 is running, external cold water can be sequentially delivered to the heat exchanger 13 via the water inlet joint 151, the first water inlet pipe 1521, the water pump assembly 23, and the second water inlet pipe 1522 for heating. For example, as shown in FIG. 1, the water inlet pipeline 15 and the water outlet pipeline 16 are disposed on opposite sides of the main body 10 along the width direction of the main body 10, for example, the water inlet pipeline 15 is located on the right side of the main body 10, and the water outlet pipeline 16 is located on the left side of the main body 10. The fan water pump assembly 20 is located on the top of the heat exchanger 13 near the side of the water inlet pipeline 15. The second water inlet pipe 1522 extends upward from the water inlet port of the heat exchanger 13 for a distance and then bends downward to connect with the water outlet port 2312 of the water pump assembly 23. The first water inlet pipe 1521 extends downward from the water inlet port 2311 of the water pump assembly 23. The water inlet joint 151 is connected to the bottom end of the first water inlet pipe 1521. When the fan water pump assembly 20 is working, the driving device 21 simultaneously drives the fan assembly 22 and the water pump assembly 23 to run, so that the fan assembly 22 provides air for the combustion of the gas in the burner 11, and the water pump assembly 23 can pressurize the water flow of the water system. The cold water passing through the water pump assembly 23 can also cool the heat generating components (such as motors, circuit boards, etc.) of the driving device 21, thereby prolonging the service life of the fan water pump assembly 20. In some embodiments, when the water inlet pipeline 15 and the water outlet pipeline 16 of the gas water heater 100 are connected to form a zero-cold-water circulation loop, the cold water remaining in the water outlet pipeline 16 can also be driven by the water pump assembly 23 to circulate along the zero-cold-water circulation loop for preheating, thereby realizing the zero-cold-water function.

[0053] As shown in FIG. 2, in an embodiment, the water outlet pipeline 16 comprises a water outlet joint 161, a first water outlet pipe 1621 and a second water outlet pipe 1622, the water outlet port of the heat exchanger 13 is connected to the water inlet port 2311 of the water pump assembly 23 via the first water outlet pipe 1621, and the water outlet port 2312 of the water pump assembly 23 is connected to the water outlet joint 161 via the second water outlet pipe 1622.

[0054] In the present embodiment, the water outlet pipeline 16 comprises a water outlet joint 161 and a water outlet pipe 162, which can comprise a first water outlet pipe 1621 and a second water outlet pipe 1622, and the water pump assembly 23 is connected in series between the first water outlet pipe 1621 and the second water outlet pipe 1622, and the water outlet port of the heat exchanger 13, the first water outlet pipe 1621, the water pump assembly 23, the second water outlet pipe 1622 and the water outlet joint 161 are connected in sequence. After the hot water in the heat exchanger 13 is output via the water outlet port, it can flow to the water outlet joint 161 along the first water outlet pipe 1621, the water pump assembly 23 and the second water outlet pipe 1622 in sequence. Exemplarily, the water inlet port and the water outlet port of the heat exchanger 13 are located on the same side, the fan water pump assembly 20 is located on the top of the heat exchanger 13 and close to the water inlet pipeline 15 on one side, the first water outlet pipe 1621 extends upward from the water outlet port of the heat exchanger 13 for a distance and is connected to the water inlet port 2311 of the water pump assembly 23, the second water outlet pipe 1622 extends downward from the water outlet port 2312 of the water pump assembly 23, and the water outlet joint 161 is arranged at the bottom end of the second water outlet pipe 1622. In order to facilitate the connection of external pipelines, in an embodiment, the water inlet joint 151 and the water outlet joint 161 are located on opposite sides of the main body 10 in the width direction. When the fan water pump assembly 20 is working, the driving device 21 drives the fan assembly 22 and the water pump assembly 23 to operate at the same time, so that the fan assembly 22 provides air for the combustion of the gas in the burner 11, and at the same time, the water pump assembly 23 can pressurize the water flow of the water system. When the water inlet pipeline 15 and the water outlet pipeline 16 of the gas water heater 100 are connected to form a zero-cold-water circulation loop, the cold water remaining in the water outlet pipeline 16 can also be driven by the water pump assembly 23 to circulate along the zero-cold-water circulation loop for preheating, so as to realize the zero-cold-water function.

[0055] As shown in FIGS. 3 and 4, in some embodiments, the gas water heater 100 further comprises a second water pump 30 arranged in the water inlet pipeline 15, the second water pump 30 is arranged in series with the water pump assembly 23, and the second water pump 30 is configured to selectively operate with the water pump assembly 23 to pressurize the water system.

[0056] In the embodiment, when the water pump assembly 23 of the fan water pump assembly 20 is in operation, the second water pump 30 can be selectively turned on or turned off under the control of the control system according to the user's demand, and the second water pump 30 can play a role of secondary pressurization. For example, when a stronger pressurization effect is needed during the user's water use, the water pump assembly 23 of the fan water pump assembly 20 and the second water pump 30 are operated at the same time, and under the joint action of the two, a stronger pressurization effect can be played on the waterway system. In addition, when the water inlet pipeline 15 and the water outlet pipeline 16 of the gas water heater 100 are communicated to form a zero-cold-water circulation loop, the cold water remaining in the water outlet pipeline 16 can also be driven to circulate along the zero-cold-water circulation loop for preheating under the joint action of the water pump assembly 23 of the fan water pump assembly 20 and the second water pump 30, increase the circulation flow, and reduce the user's waiting time.

[0057] As shown in FIG. 3, in an embodiment, the water inlet pipeline 15 includes a water inlet joint 151 and a water inlet pipe 152, the second water pump 30 is connected in series between the water inlet joint 151 and the water inlet pipe 152, the water pump assembly 23 is connected in series to the water inlet pipe 152, and the water outlet end of the water inlet pipe 152 is communicated with the water inlet port of the heat exchanger 13.

[0058] In the embodiment, the water inlet pipe 152 can include a first water inlet pipe 1521 and a second water inlet pipe 1522, and the water pump assembly 23 is connected in series between the first water inlet pipe 1521 and the second water inlet pipe 1522. The second water pump 30 is arranged in series with the water pump assembly 23 on the water inlet pipeline 15, and the second water pump 30 is located upstream of the water inlet port 2311 of the water pump assembly 23. The second water pump 30 can be selectively turned on or turned off under the control of the control system according to the user's demand. When a stronger pressurization effect is needed during the user's water use, the water pump assembly 23 of the fan water pump assembly 20 and the second water pump 30 are operated at the same time, and under the joint action of the two, a stronger pressurization effect can be played on the waterway system.

[0059] As shown in FIG. 4, in another embodiment, the water inlet pipeline 15 includes a water inlet joint 151 and a water inlet pipe 152, the second water pump 30 is connected in series between the water inlet joint 151 and the water inlet pipe 152, the water outlet end of the water inlet pipe 152 is communicated with the water inlet port of the heat exchanger 13, and the water pump assembly 23 is connected in series to the water outlet pipe 162.

[0060] In the embodiment, the water outlet pipe 162 can include a first water outlet pipe 1621 and a second water outlet pipe 1622, and the water pump assembly 23 is connected in series between the first water outlet pipe 1621 and the second water outlet pipe 1622, and the second water pump 30 is connected in series between the water inlet connector 151 and the water inlet pipe 152, so that the water pump assembly 23 and the second water pump 30 are arranged in series in the entire water circuit system. The second water pump 30 can be selectively started or stopped under the control of the control system according to the user's demand. When a stronger boosting effect is needed during the user's water use, the water pump assembly 23 and the second water pump 30 of the fan water pump assembly 20 operate simultaneously, and under the combined action of the two, a stronger boosting effect can be achieved on the water circuit system.

[0061] In an embodiment, the water outlet end of the water outlet pipe 16 is communicated with the water inlet pipe 15, so that the water inlet pipe 15, the heat exchanger 13 and the water outlet pipe 16 are communicated in series to form a zero-cold-water circulation loop, and the second water pump 30 and the water pump assembly 23 are further used to drive water flow to circulate along the zero-cold-water circulation loop.

[0062] In the embodiment, the gas water heating device 100 also has a zero-cold-water function. When the zero-cold-water function is started, the second water pump 30 and the fan water pump assembly 20 can be controlled to operate simultaneously to drive the cold water remaining in the water outlet pipe 16 to circulate along the zero-cold-water circulation loop. The cold water remaining in the water outlet pipe 16 can flow back to the water inlet pipe 15 and then be delivered to the heat exchanger 13 for heating. In this way, hot water can be output when the user opens the water using device, realizing the zero-cold-water function. Through the combined action of the water pump assembly 23 of the fan water pump assembly 20 and the second water pump 30, the circulation flow can be increased, and the waiting time of the user can be reduced.

[0063] In an embodiment, the water inlet 2311 of the water pump assembly 23 is arranged higher than the top of the heat exchanger 13. In the embodiment, the fan water pump assembly 20 is located at the top of the heat exchanger 13, and the water inlet 2311 of the water pump assembly 23 is located at the bottom thereof and arranged higher than the top of the heat exchanger 13 by a distance. The first water inlet pipe 1521 is connected with the water inlet 2311, so that a certain space can be formed between the first water inlet pipe 1521 and the heat exchanger 13, facilitating the installation of the electronic control module or other functional expansion modules of the gas water heating device 100.

[0064] In an embodiment, the water outlet 2312 of the water pump assembly 23 is arranged higher than the top of the heat exchanger 13. In this embodiment, the fan water pump assembly 20 is arranged on the top of the heat exchanger 13, the water inlet 2311 of the water pump assembly 23 is arranged on the top of the water pump assembly 23, and the water outlet 2312 of the water pump assembly 23 is arranged higher than the top of the heat exchanger 13. The second water outlet pipe 1622 is connected to the water outlet 2312, and a space is formed between the second water outlet pipe 1622 and the heat exchanger 13, so as to facilitate the installation of the electric control module or other functional expansion module of the gas water heater 100.

[0065] In an embodiment, the water inlet 2311 of the water pump assembly 23 is arranged higher than the top of the heat exchanger 13, and the water outlet 2312 of the water pump assembly 23 is arranged higher than the top of the heat exchanger 13. In this way, the fan water pump assembly 10 is arranged above the heat exchanger 13, and the space on the side of the heat exchanger 13 is reserved, so as to facilitate the installation of the electric control module or other functional expansion module of the gas water heater 100.

[0066] On the basis of the above-mentioned embodiments, the driving device 21 can be configured to control the fan assembly 22 and the water pump assembly 23 to operate simultaneously, or the driving device 21 can be configured to control the fan assembly 22 and the water pump assembly 23 to operate independently. The specific embodiments of the driving device 21 are described below.

[0067] As shown in FIGS. 5 and 6, in an embodiment, the fan assembly 22 includes a volute 221 and a fan wheel 222 arranged in the volute 221, the volute 221 has an air inlet 2211 and an air outlet 2212, the water pump assembly 23 includes a pump shell 231 and a pump wheel 232 arranged in the pump shell 231, the pump shell 231 has a water inlet 2311 and a water outlet 2312, the volute 221 and the pump shell 231 are arranged on two sides of the driving device 21 respectively, the driving device 21 has a first output end 21a and a second output end 21b for torque output, the first output end 21a is drivingly connected to the fan wheel 222, and the second output end 21b is drivingly connected to the pump wheel 232.

[0068] In the embodiment, the volute 221 is configured to form a fan cavity for accommodating the fan wheel 222, and the volute 221 has an air inlet 2211 and an air outlet 2212 which are in communication with the fan cavity, wherein the air inlet 2211 of the volute 221 is also the air inlet 2211 of the fan assembly 22, and the air outlet 2212 of the volute 221 is also the air outlet 2212 of the fan assembly 22. The pump shell 231 is configured to form a pump cavity for accommodating the pump wheel 232, and the pump shell 231 has a water inlet 2311 and a water outlet 2312 which are in communication with the pump cavity, wherein the water inlet 2311 of the pump shell 231 is also the water inlet 2311 of the water pump assembly 23, and the water outlet 2312 of the pump shell 231 is also the water outlet 2312 of the water pump assembly 23. The driving device 21 has a first output end 21a and a second output end 21b which are capable of torque output, wherein the first output end 21a and the second output end 21b can be configured to synchronously output torque, or can be configured to independently output torque. The first output end 21a can be directly drivingly connected with the fan wheel 222, or the first output end 21a and the fan wheel 222 are indirectly drivingly connected through a transmission structure. The second output end 21b can be directly drivingly connected with the pump wheel 232, or the second output end 21b and the pump wheel 232 are indirectly drivingly connected through a transmission structure. The first output end 21a and the fan wheel 222 can adopt contact power transmission or non-contact power transmission. The second output end 21b and the pump wheel 232 can adopt contact power transmission or non-contact power transmission.

[0069] The driving device 21 generates power when working, outputs torque through the first output end 21a to transmit power to the impeller 222, and drives the impeller 222 to rotate at a certain speed. When the impeller 222 rotates, it can work on the gas-phase fluid in the fan cavity to drive the gas-phase fluid to flow from the air inlet 2211 to the air outlet 2212 at a preset flow rate, thereby realizing the function of the fan. The second output end 21b outputs torque to transmit power to the pump wheel 232, and drives the pump wheel 232 to rotate at a certain speed. When the pump wheel 232 rotates, it can work on the liquid-phase fluid in the pump cavity to drive the liquid-phase fluid to flow from the water inlet 2311 to the water outlet 2312 at a preset flow rate, thereby realizing the function of the water pump. In an embodiment, the fan cavity is formed by the volute 221 and the driving device 21 together, that is, the volute 221 has an opening facing the driving device 21. When the volute 221 and the driving device 21 are assembled in place, one side end surface of the driving device 21 can function as a volute cover to cover the opening of the volute 221, so that the volute cover can be omitted, thereby saving materials, reducing costs, and reducing the volume of the fan and pump assembly 20. In an embodiment, the pump cavity is formed by the pump shell 231 and the driving device 21 together, that is, the pump shell 231 has an opening facing the driving device 21. When the pump shell 231 and the driving device 21 are assembled in place, the other side end surface of the driving device 21 can function as a pump shell cover to cover the opening of the pump shell 231, so that the pump shell cover can be omitted, thereby saving materials, reducing costs, and reducing the volume of the fan and pump assembly 20. In an embodiment, a sealing structure is provided at the connection part of the pump shell 231 and the driving device 21 to ensure the sealing performance of the pump cavity. The driving device 21 includes but is not limited to a single-shaft double-head motor, a double-rotor single-stator motor, a double-rotor double-stator motor, etc.

[0070] As shown in FIGS. 1 and 6, in an embodiment, the volute 221 and the pump shell 231 are arranged on opposite sides of the driving device 21 along the axial direction of the impeller 222. The air inlet 2211 is arranged on the side of the volute 221 away from the driving device 21. The axial direction of the impeller 222 is consistent with the width direction or the thickness direction of the main body 10.

[0071] In the present embodiment, the volute 221 and the pump shell 231 are arranged on opposite sides of the driving device 21 along the axial direction of the impeller 222, so that the overall structure is more regular and compact. The air inlet 2211 is arranged on the side of the volute 221 away from the driving device 21. The volute 221 can be provided with an air outlet 2212 on the circumferential side. The impeller 222 can be a centrifugal impeller 222 arranged in the volute 221. In this way, axial air inlet and circumferential air outlet can be achieved. In an embodiment, the impeller 222 includes at least two layers of impellers arranged along the axial direction. The impeller 222 adopts at least two layers of impellers, which is beneficial to improve aerodynamic performance, reduce noise, and improve work efficiency.

[0072] In an embodiment, the first output end 21a and the second output end 21b are configured to output torque synchronously, so as to rotate the impeller 222 and the pump wheel 232 synchronously. In this way, when the fan water pump assembly 20 is running, the impeller 222 and the pump wheel 232 can be driven to rotate at the same speed by the driving device 21 to realize the functions of the fan and the water pump at the same time.

[0073] In another embodiment, the first output end 21a and the second output end 21b are configured to output torque independently of each other, so as to rotate the impeller 222 and the pump wheel 232 independently of each other. That is, the torque output by the first output end 21a and the second output end 21b is independent of each other and does not interfere with each other. For example, the first output end 21a and the second output end 21b can output the same size of torque, or can output different sizes of torque; for another example, the first output end 21a and the second output end 21b can output torque at the same time, or one of them outputs torque and the other does not work. It can be understood that the torque output by the first output end 21a and the second output end 21b is independent of each other, so that the impeller 222 and the pump wheel 232 can run independently of each other, for example, the impeller 222 and the pump wheel 232 can rotate synchronously or asynchronously, for another example, the rotating speeds of the impeller 222 and the pump wheel 232 can be the same or different; in this way, it can be better adapted to different working conditions.

[0074] As shown in FIG. 7, in an embodiment, the driving device 21 comprises a rotor 211, an output shaft 212 and a stator 213, the rotor 211 is sleeved on the periphery of the output shaft 212 and can drive the output shaft 212 to rotate together, the output shaft 212 has the first output end 21a and the second output end 21b at two ends thereof, the impeller 222 and the pump wheel 232 are connected to the two ends of the output shaft 212 respectively, and the stator 213 is sleeved on the periphery of the rotor 211 and forms a magnetic circuit with the rotor 211 to drive the rotor 211 to rotate.

[0075] In the embodiment, the driving device 21 can adopt a single-shaft double-head motor. The driving device 21 comprises a rotor 211, a stator 213 and an output shaft 212. The stator 213 is fixed in a housing 214 of the driving device 21, for example, the stator 213 can be assembled in a cavity of the housing 214, or the stator 213 can be integrally plasticized in a shell wall of the housing 214. The stator 213 can comprise a stator core and a winding coil arranged on the stator core, the winding coil is electrified to drive the rotor 211 to rotate. In an embodiment, the stator 213 further comprises an insulation system coated on the surface of the stator core, the winding coil can be separated from the stator core through the insulation system to avoid scratching the winding coil or causing short circuit risk. The insulation system can be realized by spraying an insulation layer on the surface of the stator core, or can be realized by assembling an insulation framework outside the stator core. The rotor 211 is accommodated in the inner cavity of the stator 213, the output shaft 212 penetrates the center position of the rotor 211, the two ends of the output shaft 212 respectively penetrate out of the two sides of the housing 214, the end of the output shaft 212 close to the volute 221 forms a first output end 21a to connect the wind wheel 222, and the end of the output shaft 212 close to the pump shell 231 forms a second output end 21b to connect the pump wheel 232. When the winding coil of the stator 213 is electrified, the rotor 211 can be driven to rotate, the rotor 211 rotating can drive the output shaft 212 to rotate together, so as to drive the wind wheel 222 and the pump wheel 232 to rotate synchronously through the output shaft 212, at this time, the wind wheel 222 and the pump wheel 232 can realize simultaneous, same direction and same speed rotation.

[0076] As shown in FIG. 8, in an embodiment, the driving device 21 comprises a stator 213, a first rotor 211A and a second rotor 211B, the first rotor 211A is driven to connect the wind wheel 222 as the first output end 21a, the second rotor 211B is driven to connect the pump wheel 232 as the second output end 21b, and the stator 213 and the first rotor 211A and the second rotor 211B form a magnetic circuit to drive the first rotor 211A and the second rotor 211B to rotate, respectively.

[0077] In the embodiment, the driving device 21 can adopt a double rotor motor. The two rotors 211 of the double rotor motor drive the wind wheel 222 and the pump wheel 232 respectively. Thus, only one set of electric control system is needed to control the double rotor motor to work, and the wind wheel 222 and the pump wheel 232 can be driven to rotate by the double rotor motor. The driving device 21 comprises a stator 213, a first rotor 211A and a second rotor 211B. The first rotor 211A and the second rotor 211B can be arranged along the radial direction of the stator 213, or the first rotor 211A and the second rotor 211B can be arranged along the axial direction of the stator 213. The stator 213 and the first rotor 211A form a first magnetic circuit through an air gap, and the coil winding of the stator 213 can drive the first rotor 211A to rotate through the magnetic field of the first magnetic circuit, and then drive the wind wheel 222 to rotate through the first rotor 211A. The stator 213 and the second rotor 211B form a second magnetic circuit through an air gap, and the coil winding of the stator 213 can drive the second rotor 211B to rotate through the magnetic field of the second magnetic circuit, and then drive the pump wheel 232 to rotate through the second rotor 211B. The first rotor 211A and the second rotor 211B share one stator 213, and the overall structure is simpler, the cost is lower, and the volume is smaller.

[0078] As shown in FIG. 8, in an embodiment, the stator 213 is arranged in a ring shape, the first rotor 211A is arranged around the periphery of the stator 213, and the second rotor 211B is arranged in the inner cavity of the stator 213. In the embodiment, the first rotor 211A is an outer rotor rotatably sleeved around the periphery of the stator 213, and the second rotor 211B is an inner rotor rotatably arranged in the inner cavity of the stator 213. Thus, the first rotor 211A and the second rotor 211B are arranged along the radial direction of the stator 213, the overall arrangement structure is simple, and it is beneficial to reduce the size of the driving device 21 in the axial direction, and then reduce the volume of the fan and pump assembly 20.

[0079] As shown in FIG. 8, in an embodiment, the driving device 21 further comprises a shielding cover 215, the stator 213 is sleeved around the periphery of the shielding cover 215, the first rotor 211A is sleeved around the periphery of the stator 213 and is rotatably connected with the shielding cover 215, and the second rotor 211B is rotatably arranged in the shielding cover 215. In the embodiment, the shielding cover 215 can be used as a mounting carrier of the stator 213, the first rotor 211A and the second rotor 211B, so as to facilitate the mounting of the three. By arranging the shielding cover 215, the second rotor 211B can be separated from the stator 213, and the dry and wet isolation effect can be achieved, so as to prevent the water in the pump cavity from entering the stator 213, and to ensure the safety of the driving device 21. The stator 213 and the shielding cover 215 can be fixed by pouring glue (such as pouring epoxy resin material) or BMC injection.

[0080] As shown in FIG. 8, in an embodiment, the shield 215 is provided with a bearing 217, the first rotor 211A includes a rotor shell, a first magnetic ring and a first rotating shaft, the rotor shell is sleeved on the periphery of the stator 213, the first magnetic ring is fixed on the inner circumferential surface of the rotor shell and is arranged opposite to the stator 213, one end of the first rotating shaft is connected with the bearing 217, the other end is connected with the rotor shell, and the wind wheel 222 is connected with the rotor shell. In the embodiment, the first magnetic ring can be fixed on the inner circumferential surface of the rotor shell by means of gluing or fastener connection or the like, one end of the first rotating shaft is connected with the bearing 217 in the first accommodating cavity, and the other end of the first rotating shaft can be connected and fixed with the rotor shell by means of fastener connection or interference fit or the like, and the first rotor 211A can be stably supported by the bearing 217 to ensure the stability of the rotation of the first rotor 211A. The wind wheel 222 and the rotor shell can be integrally formed or can be assembled and fixed in a split structure. For example, the wind wheel 222 and the rotor shell can be sleeved and formed by interference fit through stamping.

[0081] As shown in FIG. 8, in an embodiment, the drive device 21 further includes a fixed shaft 216, one end of the fixed shaft 216 is connected with the pump shell 231, the other end is connected with the shield 215, the second rotor 211B includes a shaft sleeve, a second rotating shaft and a second magnetic ring which are sequentially sleeved on the periphery of the fixed shaft 216 from inside to outside, and the second rotating shaft is connected with the pump wheel 232. In the embodiment, the fixed shaft 216 is fixed relative to the shield 215 and the pump shell 231, the shaft sleeve is rotatably sleeved on the periphery of the fixed shaft 216, the second rotating shaft is fixed on the periphery of the shaft sleeve, and the second magnetic ring is fixed on the periphery of the second rotating shaft. The second magnetic ring and the stator 213 form a second magnetic circuit through an air gap. The magnetic field in the second magnetic circuit drives the second magnetic ring to rotate, and then drives the second rotating shaft to rotate through the second magnetic ring, and drives the pump wheel 232 to rotate through the second rotating shaft, thereby realizing the water pump function.

[0082] The above description is only an exemplary embodiment of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by using the content of the present application and the drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A gas water heating apparatus wherein, The gas water heating device comprises: a main body having a gas path system and a water path system; and a fan water pump assembly installed on the main body, the fan water pump assembly comprising a driving device and a fan assembly and a water pump assembly respectively drivingly connected with the driving device, an air inlet of the fan assembly being communicated with the gas path system, the water pump assembly being communicated with the water path system, the driving device being used for controlling the fan assembly to operate so that the fan assembly drives airflow to flow along the gas path system into the fan assembly and be discharged from an air outlet of the fan assembly, the driving device being also used for controlling the water pump assembly to operate so that the water pump assembly drives water flow to flow along the water path system.

2. The gas water heating apparatus as claimed in claim 1, wherein, The main body comprises a burner, a combustion chamber box and a heat exchanger arranged in sequence, a combustion chamber is formed inside the combustion chamber box, a side wall of the combustion chamber is provided with an air inlet hole, a gas passage of the burner, the combustion chamber and a flue gas passage of the heat exchanger are communicated in sequence to form the gas path system, and the fan water pump assembly is arranged on a side of the heat exchanger away from the combustion chamber box.

3. The gas water heating apparatus as claimed in claim 2, wherein, The burner, the combustion chamber box and the heat exchanger are arranged in sequence from bottom to top, the main body further comprises a smoke collecting hood arranged on a top of the heat exchanger, the gas path system further comprises a smoke collecting cavity formed in the smoke collecting hood, and the fan assembly is installed on the smoke collecting hood, and an air inlet of the fan assembly is communicated with the smoke collecting cavity.

4. The gas water heating apparatus as claimed in claim 2, wherein, The main body further comprises a water inlet pipeline and a water outlet pipeline, the water inlet pipeline is communicated with a water inlet port of the heat exchanger, the water outlet pipeline is communicated with a water outlet port of the heat exchanger, the water inlet pipeline, the heat exchanger and the water outlet pipeline are communicated in sequence to form the water path system, and the water pump assembly is arranged on the water inlet pipeline or the water outlet pipeline.

5. The gas water heating apparatus as claimed in claim 4, wherein, The water inlet pipeline comprises a water inlet connector, a first water inlet pipe and a second water inlet pipe, the water inlet connector is communicated with a water inlet of the water pump assembly via the first water inlet pipe, and a water outlet of the water pump assembly is communicated with the water inlet port of the heat exchanger via the second water inlet pipe; Alternatively, the water outlet pipeline comprises a water outlet connector, a first water outlet pipe and a second water outlet pipe, the water outlet port of the heat exchanger is communicated with the water inlet of the water pump assembly via the first water outlet pipe, and the water outlet of the water pump assembly is communicated with the water outlet connector via the second water outlet pipe.

6. Gas water heating apparatus as claimed in claim 4 or 5 wherein, The gas water heating device further comprises a second water pump arranged on the water inlet pipeline, the second water pump is arranged in series with the water pump assembly, and the second water pump is configured to selectively operate together with the water pump assembly to pressurize the water path system.

7. The gas water heating apparatus as claimed in claim 6, wherein, A water outlet end of the water outlet pipeline is communicated with the water inlet pipeline, so that the water inlet pipeline, the heat exchanger and the water outlet pipeline are communicated in sequence to form a zero cold water circulation loop, and the second water pump and the water pump assembly are further used for driving water flow to circulate along the zero cold water circulation loop.

8. The gas water heating apparatus as claimed in any one of claims 4 to 7 wherein, The water inlet of the water pump assembly is arranged higher than a top of the heat exchanger; and / or, the water outlet of the water pump assembly is arranged higher than the top of the heat exchanger.

9. The gas water heating apparatus as claimed in any one of claims 1 to 8, wherein, The fan assembly comprises a volute and a fan wheel arranged in the volute, the volute has the air inlet and the air outlet, the water pump assembly comprises a pump shell and a pump wheel arranged in the pump shell, the pump shell has a water inlet and a water outlet, the volute and the pump shell are arranged on opposite sides of the driving device respectively, the driving device has a first output end and a second output end for torque output, the first output end is drivingly connected with the fan wheel, and the second output end is drivingly connected with the pump wheel.

10. The gas water heating apparatus as claimed in claim 9, wherein, The volute and the pump shell are arranged on opposite sides of the driving device along the axial direction of the fan wheel, the air inlet is arranged on the side of the volute away from the driving device, and the axial direction of the fan wheel is consistent with the width direction or the thickness direction of the main body; Alternatively, the first output end and the second output end are configured to be able to synchronously output torque to make the fan wheel and the pump wheel rotate synchronously; Alternatively, the first output end and the second output end are configured to be able to independently output torque to make the fan wheel and the pump wheel rotate independently.

11. Gas water heating apparatus as claimed in claim 9 or 10 wherein, The driving device comprises a rotor, a stator and an output shaft, the rotor is sleeved on the periphery of the output shaft and can drive the output shaft to rotate together, the output shaft has the first output end and the second output end at two ends respectively, the fan wheel and the pump wheel are connected to the two ends of the output shaft respectively, and the stator is sleeved on the periphery of the rotor and forms a magnetic circuit with the rotor to drive the rotor to rotate; Alternatively, the driving device comprises a stator, a first rotor and a second rotor, the first rotor is drivingly connected with the fan wheel as the first output end, the second rotor is drivingly connected with the pump wheel as the second output end, and the stator forms a magnetic circuit with the first rotor and the second rotor respectively to drive the first rotor and the second rotor to rotate respectively.

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