Gas water heating equipment

Abstract

The utility model discloses fuel gas water heating equipment, which relates to the technical field of water heating equipment, and comprises a main machine body, a gas path system, a water path system, a gas path system and a water path system, the fan and water pump assembly is installed on the main machine body and comprises a driving device, a fan assembly and a water pump assembly, the fan assembly and the water pump assembly are in driving connection with the driving device, an air inlet of the fan assembly communicates with the air path system, and the water pump assembly communicates with the water path system; the driving device is used for controlling the fan assembly to operate so that the fan assembly can drive airflow to flow into the fan assembly along the air path system and be exhausted from an air outlet of the fan assembly, and the driving device is further used for controlling the water pump assembly to operate so that the water pump assembly can drive water flow to flow along the water path system. According to the technical scheme, the cost of the gas water heating equipment can be reduced, the size of the whole machine is reduced, and meanwhile the assembling efficiency of the whole machine can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of hot water equipment, in particular to a gas hot water equipment. Background Art

[0002] In the related art, some gas hot water equipments are usually provided with a fan and a water pump. However, the fan and the water pump are usually independently arranged and need to be respectively configured with a set of driving devices, resulting in a high cost of the gas hot water equipment; and the fan and the water pump are separately arranged, and the overall structure is not compact enough, which will occupy a large installation space and cause the gas hot water equipment to have a large volume; in addition, the fan and the water pump need to be stepwise installed on the main body of the gas hot water equipment, resulting in a low assembly efficiency of the gas hot water equipment. Summary of the Utility Model

[0003] The main purpose of the utility model is to propose a gas hot water equipment, aiming to reduce the cost of the gas hot water equipment, reduce the volume of the whole machine, and improve the assembly efficiency of the whole machine at the same time.

[0004] To achieve the above object, the gas hot water equipment proposed by the utility model includes:

[0005] A main body, the main body having a gas path system and a water path system; and

[0006] A fan and water pump assembly, installed on the main body, the fan and water pump assembly including a driving device and a fan assembly and a water pump assembly respectively drivingly connected to the driving device, an air inlet of the fan assembly communicating with the gas path system, the water pump assembly communicating with the water path system, the driving device being used to control the operation of the fan assembly so that the fan assembly drives air flow to flow into the fan assembly along the gas path system and be discharged from an air outlet of the fan assembly, and the driving device is further used to control the operation of the water pump assembly so that the water pump assembly drives water flow to flow along the water path system.

[0007] In an embodiment, the main body includes a burner, a combustion chamber box body and a heat exchanger which are sequentially arranged, a combustion chamber is formed inside the combustion chamber box body, an air inlet hole is provided on a side wall of the combustion chamber, a gas passage of the burner, the combustion chamber and a flue gas passage of the heat exchanger are sequentially communicated 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.

[0008] In an embodiment, the burner, the combustion chamber box body and the heat exchanger are sequentially arranged from bottom to top, the main body further includes a smoke collecting hood covering the top of the heat exchanger, the gas path system further includes a smoke collecting cavity formed in the smoke collecting hood, the fan assembly is installed on the smoke collecting hood, and an air inlet of the fan assembly communicates with the smoke collecting cavity.

[0009] In one embodiment, the main body further includes a water inlet pipeline and a water outlet pipeline. The water inlet pipeline is connected to the water inlet port of the heat exchanger, and the water outlet pipeline is connected to the water outlet port of the heat exchanger. The water inlet pipeline, the heat exchanger, and the water outlet pipeline are sequentially connected to form the water circuit system, and the water pump assembly is disposed in the water inlet pipeline or the water outlet pipeline.

[0010] In one embodiment, the water inlet pipeline includes a water inlet joint, a first water inlet pipe, and a second water inlet pipe. The water inlet joint is connected to the water inlet of the water pump assembly via the first water inlet pipe, and the water outlet of the water pump assembly is connected to the water inlet port of the heat exchanger via the second water inlet pipe;

[0011] Alternatively, the water outlet pipeline includes a water outlet joint, a first water outlet pipe, and a second water outlet pipe. The water outlet port of the heat exchanger is connected to the water inlet of the water pump assembly via the first water outlet pipe, and the water outlet of the water pump assembly is connected to the water outlet joint via the second water outlet pipe.

[0012] In one embodiment, the gas water heating device further includes a second water pump disposed in the water inlet pipeline. The second water pump is connected in series with the water pump assembly and is configured to selectively operate together with the water pump assembly to pressurize the water circuit system.

[0013] In one embodiment, the water outlet end of the water outlet pipeline is connected to the water inlet pipeline so that the water inlet pipeline, the heat exchanger, and the water outlet pipeline are connected end to end to form a zero cold water circulation loop, and the second water pump and the water pump assembly are also used to drive the water flow to circulate along the zero cold water circulation loop.

[0014] In one embodiment, the water inlet of the water pump assembly is disposed higher than the top of the heat exchanger; and / or, the water outlet of the water pump assembly is disposed higher than the top of the heat exchanger.

[0015] In one embodiment, the fan assembly includes a volute and a wind wheel disposed in the volute. The volute has the air inlet and the air outlet. The water pump assembly includes a pump housing and a pump impeller disposed in the pump housing. The pump housing has a water inlet and a water outlet. The volute and the pump housing are respectively disposed on both sides of the driving device. The driving device has a first output end and a second output end for torque output. The first output end is drivingly connected to the wind wheel, and the second output end is drivingly connected to the pump impeller.

[0016] In one embodiment, the volute and the pump housing are axially disposed on opposite sides of the driving device along the axis of the wind wheel. The air inlet is disposed on the side of the volute away from the driving device, and the axis of the wind wheel is consistent with the width direction or the thickness direction of the main body.

[0017] Alternatively, the first output end and the second output end are configured to output torque synchronously, so that the wind wheel and the pump wheel rotate synchronously.

[0018] Alternatively, the first output end and the second output end are configured to output torque independently of each other, so that the wind wheel and the pump wheel rotate independently of each other.

[0019] In an embodiment, the driving device includes a rotor, a stator, and an output shaft. The rotor is sleeved around the output shaft and can drive the output shaft to rotate together. The two ends of the output shaft respectively form the first output end and the second output end. The wind wheel and the pump wheel are respectively connected to the two ends of the output shaft. The stator is sleeved around the rotor and forms a magnetic circuit with the rotor to drive the rotor to rotate.

[0020] Alternatively, the driving device includes a stator, a first rotor, and a second rotor. The first rotor serves as the first output end and is drivingly connected to the wind wheel. The second rotor serves as the second output end and is drivingly connected to the pump wheel. The stator respectively forms a magnetic circuit with the first rotor and the second rotor to drive the first rotor and the second rotor to rotate respectively.

[0021] The technical solution of the present utility model is that a fan-water pump assembly is installed on the main body of the gas water heating device. The fan assembly of the fan-water pump assembly is communicated with the gas path system of the main body, and the water pump assembly of the fan-water pump assembly is communicated with the water path system of the main body. Moreover, the fan assembly and the water pump assembly share a set of driving devices for driving control. When the gas water heating device works, the driving device is used to control the operation of the fan assembly. Then, the fan assembly can drive the air flow to flow along the gas path system and be discharged from the air outlet of the fan assembly, realizing the fan function. The driving device is used to control the operation of the water pump assembly. Then, the water pump function can be realized. In this way, only one set of driving devices needs to be configured when realizing the two functions of the fan and the water pump, which can reduce the cost of the gas water heating device. Moreover, the integration degree of the fan-water pump assembly is higher, the number of driving devices is reduced, the internal installation space of the gas water heating device can be saved, which is beneficial to reducing the volume of the gas water heating device and making more installation space available inside the gas water heating device for installing other expansion function modules. And when assembling the gas water heating device, only the fan-water pump assembly needs to be installed on the main body at one time, which can simplify the installation steps and thus improve the assembly efficiency of the gas water heating device. Description of the Drawings

[0022] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on the structures shown in these drawings.

[0023] Figure 1 Structural schematic diagram of the first embodiment of the gas water heating equipment provided by the present invention;

[0024] Figure 2 Structural schematic diagram of the second embodiment of the gas water heating equipment provided by the present invention;

[0025] Figure 3 Structural schematic diagram of the third embodiment of the gas water heating equipment provided by the present invention;

[0026] Figure 4 Structural schematic diagram of the fourth embodiment of the gas water heating equipment provided by the present invention;

[0027] Figure 5 Structural schematic diagram of an embodiment of the fan and water pump assembly provided by the present invention;

[0028] Figure 6 For Figure 5 Exploded structural schematic diagram of the fan and water pump assembly in

[0029] Figure 7 Cross-sectional structural schematic diagram of an embodiment of the fan and water pump assembly provided by the present invention;

[0030] Figure 8 Cross-sectional structural schematic diagram of another embodiment of the fan and water pump assembly provided by the present invention.

[0031] Explanation of the reference numerals in the drawings:

[0032] 100, Gas water heating equipment; 10, Main body; 11, Burner; 12, Combustion chamber box; 121, Air inlet hole; 13, Heat exchanger; 14, Smoke collecting hood; 15, Water inlet pipeline; 151, Water inlet connector; 152, Water inlet pipe; 1521, First water inlet pipe; 1522, Second water inlet pipe; 16, Water outlet pipeline; 161, Water outlet connector; 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, Housing; 215, Shielding cover; 216, Fixed shaft; 217, Bearing; 22, Fan assembly; 221, Volute; 2211, Air inlet; 2212, Air outlet; 222, Impeller; 23, Water pump assembly; 231, Pump housing; 2311, Water inlet; 2312, Water outlet; 232, Pump impeller; 30, Second water pump.

[0033] The realization, functional features and advantages of the purpose of the present utility model will be further described in conjunction with the embodiments and with reference to the accompanying drawings. Specific embodiments

[0034] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0035] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0036] In addition, if the embodiments of the present utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first", "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel scenarios. Taking "A and / or B" as an example, it includes Scenario A, or Scenario B, or the scenario where both A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0037] 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 separately arranged and require a set of driving devices to be configured respectively, resulting in a relatively high cost of the gas water heating device; and the fan and the water pump are separately arranged, and the overall structure is not compact enough, which will occupy a relatively large installation space, resulting in a relatively large volume of the gas water heating device; in addition, the fan and the water pump need to be installed step by step on the main body of the gas water heating device, resulting in a relatively low assembly efficiency of the gas water heating device.

[0038] The present utility model provides a gas water heating device 100. By integrating the fan and the water pump into one and sharing a set of driving device 21, the cost of the gas water heating device 100 can be reduced, the volume of the whole machine can be reduced, and the assembly efficiency of the whole machine can be improved at the same time.

[0039] Please refer to Figures 1 to 5 , in some embodiments of the present utility model, the gas water heating device 100 includes a main body 10 and a fan-water pump assembly 20. The main body 10 has a gas path system and a water path system; the fan-water pump assembly 20 is installed on the main body 10. The fan-water pump assembly 20 includes a driving device 21 and a fan assembly 22 and a water pump assembly 23 that are respectively drivingly connected to the driving device 21. The air inlet 2211 of the fan assembly 22 communicates with the gas path system, the water pump assembly 23 communicates with the water path system, and the driving device 21 is used to control the operation of the fan assembly 22 so that the fan assembly 22 drives air flow 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. The driving device 21 is also used to control the operation of the water pump assembly 23 so that the water pump assembly 23 drives water flow to flow along the water path system.

[0040] The gas water heating device 100 includes, but is not limited to, gas water heaters, gas wall-mounted boilers, etc. Among them, the main body 10 constitutes the main structure of the gas water heating device 100. The main body 10 has an air path system for transporting gaseous fluids (such as gas and flue gas), and a water path system for transporting liquid fluids (such as water flow). The fan and water pump assembly 20 is installed on the main body 10. The fan and water pump assembly 20 integrates the fan assembly 22 and the water pump assembly 23 into one body, and the fan assembly 22 and the water pump assembly 23 share a set of drive devices 21 for drive control, so that the fan function and the water pump function can be integrated into one body. Among them, the fan assembly 22 is connected to the air path system. By controlling the operation of the fan assembly 22 through the drive device 21, the air flow can be driven to flow along the air path system through the fan assembly 22. The gas water heating device 100 specifically relates to a strong extraction type gas water heating device 100. The air inlet 2211 of the fan assembly 22 is connected to the outlet end of the air path system. In this way, when the fan assembly 22 operates, the air flow in the air path system can be drawn 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 inlet pipeline 15 or the outlet pipeline 16 of the water path system. The fan assembly 22 and the water pump assembly 23 share a set of drive devices 21. Among them, the drive device 21 can be configured to control the fan assembly 22 and the water pump assembly 23 to operate simultaneously, or the drive device 21 can also be configured to control the fan assembly 22 and the water pump assembly 23 to operate independently of each other, which is not specifically limited here.

[0041] The technical solution of the present utility model is that a fan and water pump assembly 20 is installed on the main body 10 of the gas water heating device 100. The fan assembly 22 of the fan and water pump assembly 20 is connected to the air path system of the main body 10, and the water pump assembly 23 of the fan and 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 drive devices 21 for drive control. When the gas water heating device 100 works, the operation of the fan assembly 22 is controlled through the drive device 21, and then the air flow can be driven to flow along the air path system through the fan assembly 22 and discharged from the air outlet 2212 of the fan assembly 22, realizing the fan function; the operation of the water pump assembly 23 is controlled through the drive device 21, and then the water pump function can be realized. In this way, only one set of drive devices 21 needs to be configured when realizing the two functions of the fan and the water pump, which can reduce the cost of the gas water heating device 100; and the integration degree of the fan and water pump assembly 20 is higher, the number of drive devices 21 is reduced, the internal installation space of the gas water heating device 100 can be saved, which is beneficial to reducing the volume of the gas water heating device 100, and is beneficial to making more installation space available inside the gas water heating device 100 for installing other expansion function modules. And when assembling the gas water heating device 100, only the fan and water pump assembly 20 needs to be installed on the main body 10 at one time, which can simplify the installation steps and thus improve the assembly efficiency of the gas water heating device 100.

[0042] like Figure 1 As shown, in one embodiment, the main body 10 includes a burner 11, a combustion chamber box 12 and a heat exchanger 13 which are arranged in sequence, a combustion chamber is formed inside the combustion chamber box 12, and an air inlet hole 121 is provided on the side wall of the combustion chamber. The gas channel of the burner 11, the combustion chamber and the smoke channel of the heat exchanger 13 are connected in sequence to form the gas path system, and the fan water pump assembly 20 is arranged on the side of the heat exchanger 13 away from the combustion chamber box 12.

[0043] In this embodiment, the gas water heater 100 specifically relates to a forced extraction type gas water heater 100, such as a forced extraction type gas water heater. The gas water heater 100 includes 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 heater 100 with an inverted combustion system. The burner 11 has a gas channel for conveying combustion gas (including gas and air), a combustion chamber that is connected from top to bottom is constructed inside the combustion chamber box 12, the heat exchanger 13 may include two end plates arranged opposite to each other, and a heat exchange body arranged between the two end plates, the heat exchange body may include a heat exchange tube and a fin group sleeved on the outer periphery of the heat exchange tube, a flue gas channel for flue gas to pass through is formed between the two end plates, and a water flow channel for water flow to pass through is formed in the heat exchange tube. The gas channel of the burner 11, the combustion chamber of the combustion chamber box 12 and the flue gas channel of the heat exchanger 13 are connected in sequence to form a gas path system. When the gas water heater 100 is working, gas and air can be conveyed to the burner 11 through the gas channel, and the burner 11 ignites and burns to generate high-temperature flue gas, which flows along the combustion chamber toward the heat exchanger 13, and the flue gas passes through the flue gas channel of the heat exchanger 13 to heat the water flow in the heat exchanger 13. Among them, the fan assembly 22 has an air inlet 2211 and an air outlet 2212. The air inlet 2211 of the fan assembly 22 is connected to the air outlet end of the air 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 can drive the high-temperature flue gas generated by the burner 11 to flow along the air path system to exchange heat with the heat exchanger 13, thereby improving the heat exchange efficiency. The flue gas after heat exchange is finally discharged from the air outlet 2212 of the fan assembly 22.

[0044] like Figure 1As shown, in one embodiment, the burner 11, the combustion chamber box 12, and the heat exchanger 13 are arranged in sequence from bottom to top. The main body 10 further includes a smoke collecting hood 14 covering the top of the heat exchanger 13. The gas path system further includes a smoke collecting chamber formed within the smoke collecting hood 14. The fan assembly 22 is installed on the smoke collecting hood 14, and the air inlet 2211 of the fan assembly 22 communicates with the smoke collecting chamber.

[0045] In this embodiment, the burner 11, the combustion chamber box 12, the heat exchanger 13, and the smoke collecting hood 14 are arranged in sequence from bottom to top. The fan and water pump assembly 20 and the smoke collecting hood 14 are arranged side by side on the top of the heat exchanger 13. The fan assembly 22 of the fan and water pump assembly 20 can function as a strong exhaust fan to achieve the exhaust function. When the gas water heater 100 operates, the driving device 21 of the fan and water pump assembly 20 drives the fan assembly 22 to operate, so as to provide sufficient air for gas combustion, and drives the high-temperature flue gas generated by the combustion of the burner 11 to flow along the combustion chamber box 12 towards the heat exchanger 13 for heat exchange with the heat exchanger 13. The flue gas after heat exchange is collected through the smoke collecting chamber of the smoke collecting hood 14 and then flows into the fan assembly 22, and is discharged from the air outlet 2212 of the fan assembly 22.

[0046] As Figures 1 to 4 As shown, in some embodiments, the main body 10 further includes a water inlet pipe 15 and a water outlet pipe 16. The water inlet pipe 15 communicates with the water inlet port of the heat exchanger 13, and the water outlet pipe 16 communicates with the water outlet port of the heat exchanger 13. The water inlet pipe 15, the heat exchanger 13, and the water outlet pipe 16 are sequentially connected to form the water path system. The water pump assembly 23 is provided on the water inlet pipe 15 or the water outlet pipe 16.

[0047] In this embodiment, the heat exchanger 13 has a water inlet port for inputting cold water and a water outlet port for outputting hot water. Among them, the water inlet port and the water outlet port can be respectively arranged on opposite sides of the heat exchanger 13, or the water inlet port and the water outlet port can also be arranged on the same side of the heat exchanger 13. The water inlet pipe 15, the heat exchanger 13, and the water outlet pipe 16 are sequentially connected to form the water path system. When the gas water heater 100 operates, the driving device 21 of the fan and water pump assembly 20 drives the water pump assembly 23 to operate, so that the external cold water can be transported to the heat exchanger 13 through the water inlet pipe 15 for heating, and the heated hot water can be output through the water outlet pipe 16 to provide hot water for users. Among them, the water pump assembly 23 can be connected in series on the water inlet pipe 15, or can also be connected in series on the water outlet pipe 16 to play a role in pressurizing the water path system. When the water pump assembly 23 is provided on the water inlet pipe 15, the cold water can also cool the heat generating components (such as motors, circuit boards, etc.) of the driving device 21 of the fan and water pump assembly 20, thereby extending the service life of the fan and water pump assembly 20.

[0048] The following examples illustrate several installation scenarios for the fan - water pump assembly 20.

[0049] As Figure 1 and Figure 5 shown, in one 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 communicates with the water inlet 2311 of the water pump assembly 23 via the first water inlet pipe 1521, and the water outlet 2312 of the water pump assembly 23 communicates with the water inlet port of the heat exchanger 13 via the second water inlet pipe 1522.

[0050] In this embodiment, the water inlet pipeline 15 includes a water inlet joint 151 and a water inlet pipe 152. The water inlet pipe 152 may 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 operates, external cold water can be sequentially transported through the water inlet joint 151, the first water inlet pipe 1521, the water pump assembly 23, and the second water inlet pipe 1522 into the heat exchanger 13 for heating. Exemplarily, as Figure 1 shown, 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, 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 side of the heat exchanger 13 close to 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 certain distance and then bends downward to connect with the water outlet 2312 of the water pump assembly 23. The first water inlet pipe 1521 extends downward from the water inlet 2311 of the water pump assembly 23, and 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 operates, the driving device 21 drives both the fan assembly 22 and the water pump assembly 23 to operate simultaneously, so that while the fan assembly 22 provides air for the combustion of the gas in the burner 11, the water pump assembly 23 can increase the water flow rate 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 extending the service life of the fan - water pump assembly 20. And, in some embodiments, when the water inlet pipeline 15 and the water outlet pipeline 16 of the gas - fired hot water device 100 are connected to form a zero - cold - water circulation loop, the water pump assembly 23 can also drive the cold water remaining in the water outlet pipeline 16 to circulate along the zero - cold - water circulation loop for preheating to achieve the zero - cold - water function.

[0051] As Figure 2As shown, in one embodiment, the outlet pipeline 16 includes an outlet joint 161, a first outlet pipe 1621 and a second outlet pipe 1622. The outlet port of the heat exchanger 13 is communicated with the inlet port 2311 of the water pump assembly 23 via the first outlet pipe 1621, and the outlet port 2312 of the water pump assembly 23 is communicated with the outlet joint 161 via the second outlet pipe 1622.

[0052] In this embodiment, the outlet pipeline 16 includes an outlet joint 161 and an outlet pipe 162. The outlet pipe 162 may include a first outlet pipe 1621 and a second outlet pipe 1622. The water pump assembly 23 is connected in series between the first outlet pipe 1621 and the second outlet pipe 1622. The outlet port of the heat exchanger 13, the first outlet pipe 1621, the water pump assembly 23, the second outlet pipe 1622 and the outlet joint 161 are communicated in sequence. After the hot water in the heat exchanger 13 is output via the outlet port, it can flow along the first outlet pipe 1621, the water pump assembly 23, and the second outlet pipe 1622 in sequence to the outlet joint 161 for output. Exemplarily, the inlet port and the outlet port of the heat exchanger 13 are on the same side. The fan-water pump assembly 20 is located at the top of the heat exchanger 13, on the side close to the inlet pipeline 15. The first outlet pipe 1621 extends upward from the outlet port of the heat exchanger 13 for a certain distance and then is connected to the inlet port 2311 of the water pump assembly 23. The second outlet pipe 1622 extends downward from the outlet port 2312 of the water pump assembly 23, and the outlet joint 161 is arranged at the bottom end of the second outlet pipe 1622. Optionally, to facilitate the connection of external pipelines, the inlet joint 151 and the outlet joint 161 are located on opposite sides in the width direction of the main body 10. When the fan-water pump assembly 20 operates, the driving device 21 drives the fan assembly 22 and the water pump assembly 23 to run simultaneously, so that while the fan assembly 22 provides air for the combustion of the gas in the burner 11, the water pump assembly 23 can increase the pressure of the water flow in the water circuit system. When the inlet pipeline 15 and the outlet pipeline 16 of the gas water heater 100 are connected to form a zero cold water circulation loop, the water pump assembly 23 can also drive the cold water remaining in the outlet pipeline 16 to circulate along the zero cold water circulation loop for preheating to achieve the zero cold water function.

[0053] As Figure 3 and Figure 4 As shown, in some embodiments, the gas water heater 100 further includes a second water pump 30 provided in the inlet pipeline 15. The second water pump 30 is connected in series with the water pump assembly 23, and the second water pump 30 is configured to selectively operate together with the water pump assembly 23 to increase the pressure of the water circuit system.

[0054] In this embodiment, when the water pump assembly 23 of the fan and water pump assembly 20 is in an operating state, the second water pump 30 can be selectively turned on or off under the control of the control system according to user needs, and the second water pump 30 can play a role in secondary pressurization. For example, when a stronger pressurization effect is required during the user's water use process, the water pump assembly 23 of the fan and water pump assembly 20 and the second water pump 30 operate simultaneously, and under their combined action, a stronger pressurization effect can be achieved on the water circuit system. In addition, when the water inlet pipe 15 and the water outlet pipe 16 of the gas water heating device 100 are connected to form a zero cold water circulation loop, under the combined action of the water pump assembly 23 of the fan and water pump assembly 20 and the second water pump 30, the cold water remaining in the water outlet pipe 16 can be driven to circulate along the zero cold water circulation loop for preheating, increasing the circulation flow rate and reducing the user's waiting time.

[0055] As Figure 3 shown, in one embodiment, the water inlet pipe 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 communicates with the water inlet port of the heat exchanger 13.

[0056] In this embodiment, the water inlet pipe 152 may 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. The second water pump 30 and the water pump assembly 23 are arranged in series on the water inlet pipe 15, and the second water pump 30 is located upstream of the water inlet 2311 of the water pump assembly 23. The second water pump 30 can be selectively turned on or off under the control of the control system according to user needs. When a stronger pressurization effect is required during the user's water use process, the water pump assembly 23 of the fan and water pump assembly 20 and the second water pump 30 operate simultaneously, and under their combined action, a stronger pressurization effect can be achieved on the water circuit system.

[0057] As Figure 4 shown, in another embodiment, the water inlet pipe 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 communicates with the water inlet port of the heat exchanger 13. The water pump assembly 23 is connected in series to the water outlet pipe 162.

[0058] In this embodiment, the water outlet pipe 162 may include a first water outlet pipe 1621 and a second water outlet pipe 1622. The water pump assembly 23 is connected in series between the first water outlet pipe 1621 and the second water outlet pipe 1622. The second water pump 30 is connected in series between the water inlet joint 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 turned on or off under the control of the control system according to user needs. When a stronger pressurization effect is required during the user's water use process, the water pump assembly 23 of the fan water pump assembly 20 and the second water pump 30 operate simultaneously, and under their combined action, a stronger pressurization effect can be achieved on the water circuit system.

[0059] In one embodiment, the water outlet end of the water outlet pipe 16 communicates with the water inlet pipe 15, so that the water inlet pipe 15, the heat exchanger 13, and the water outlet pipe 16 are connected end to end to form a zero cold water circulation loop. The second water pump 30 and the water pump assembly 23 are also used to drive the water flow to circulate along the zero cold water circulation loop.

[0060] In this embodiment, the gas water heating device 100 also has a zero cold water function. After 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 transported by the water inlet pipe 15 to the heat exchanger 13 for heating. In this way, hot water can be output when the user turns on the water using device, realizing the zero cold water function; and 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 rate can be increased, reducing the user's waiting time.

[0061] In one embodiment, the water inlet 2311 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 located at the top of the heat exchanger 13. The water inlet 2311 of the water pump assembly 23 is located at its bottom and is arranged at a certain distance higher than the top of the heat exchanger 13. The first water inlet pipe 1521 is connected to the water inlet 2311, so that a certain space can be left between the first water inlet pipe 1521 and the heat exchanger 13 to facilitate the installation of the electric control module or other function expansion modules of the gas water heating device 100.

[0062] In one embodiment, the water outlet 2312 of the water pump assembly 23 is disposed above the top of the heat exchanger 13. In this embodiment, the fan and water pump assembly 20 is located at the top of the heat exchanger 13, and the water inlet 2312 of the water pump assembly 23 is located at its top and is disposed at a distance above the top of the heat exchanger 13. The second water outlet pipe 1622 is connected to the water outlet 2312, and a certain space is left between the second water outlet pipe 1622 and the heat exchanger 13 to facilitate the installation of the electronic control module or other function expansion modules of the gas water heater 100.

[0063] Optionally, the water inlet 2311 of the water pump assembly 23 is disposed above the top of the heat exchanger 13, and the water outlet 2312 of the water pump assembly 23 is disposed above the top of the heat exchanger 13. The fan and water pump assembly 10 is completely located above the heat exchanger 13, which is beneficial to reserve the space on the side of the heat exchanger 13 to facilitate the installation of the electronic control module or other function expansion modules of the gas water heater 100.

[0064] Based on the above 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 also be configured to control the fan assembly 22 and the water pump assembly 23 to operate independently of each other. The following is an example of the specific implementation manner of the driving device 21.

[0065] As Figure 5 and Figure 6 shown, in one embodiment, the fan assembly 22 includes a volute 221 and an impeller 222 disposed 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 housing 231 and a pump impeller 232 disposed in the pump housing 231. The pump housing 231 has a water inlet 2311 and a water outlet 2312. The volute 221 and the pump housing 231 are respectively disposed on both sides of the driving device 21. 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 impeller 222, and the second output end 21b is drivingly connected to the pump impeller 232.

[0066] In this embodiment, the volute 221 constructs a blower cavity for accommodating the blower wheel 222. The volute 221 has an air inlet 2211 and an air outlet 2212 that communicate with the blower cavity. Among them, the air inlet 2211 of the volute 221 is also the air inlet 2211 of the blower assembly 22, and the air outlet 2212 of the volute 221 is also the air outlet 2212 of the blower assembly 22. The pump housing 231 constructs a pump cavity for accommodating the pump impeller 232. The pump housing 231 has a water inlet 2311 and a water outlet 2312 that communicate with the pump cavity. Among them, the water inlet 2311 of the pump housing 231 is also the water inlet 2311 of the water pump assembly 23, and the water outlet 2312 of the pump housing 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 capable of torque output. Among them, the first output end 21a and the second output end 21b can be configured to output torque synchronously, or can also be configured to output torque independently of each other. The first output end 21a and the blower wheel 222 can be directly drivingly connected, or the first output end 21a and the blower wheel 222 are indirectly drivingly connected through a transmission structure; the second output end 21b and the pump impeller 232 can be directly drivingly connected, or the second output end 21b and the pump impeller 232 are indirectly drivingly connected through a transmission structure. Contact power transmission or non-contact power transmission can be adopted between the first output end 21a and the blower wheel 222. Contact power transmission or non-contact power transmission can be adopted between the second output end 21b and the pump impeller 232.

[0067] When the driving device 21 works, it generates power and outputs torque through the first output end 21a to transmit the power to the wind wheel 222, thereby driving the wind wheel 222 to rotate at a certain speed. When the wind wheel 222 rotates, it can do 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, so as to realize the fan function; it outputs torque through the second output end 21b to transmit the power to the pump impeller 232, thereby driving the pump impeller 232 to rotate at a certain speed. When the pump impeller 232 rotates, it can do 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, so as to realize the water pump function. Optionally, the fan cavity is jointly formed by the volute 221 and the driving device 21, 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 face of the driving device 21 can act as a volute cover to cover the opening of the volute 221, so that the volute cover can be omitted, which is beneficial to saving materials, reducing costs, and reducing the volume of the fan and water pump assembly 20. Optionally, the pump cavity is jointly formed by the pump housing 231 and the driving device 21, that is, the pump housing 231 has an opening facing the driving device 21. When the pump housing 231 and the driving device 21 are assembled in place, the other side end face of the driving device 21 can act as a pump housing cover to cover the opening of the pump housing 231, so that the pump housing cover can be omitted, which is beneficial to saving materials, reducing costs, and reducing the volume of the fan and water pump assembly 20. Optionally, a sealing structure is provided at the connection part between the pump housing 231 and the driving device 21 to ensure the sealing performance of the pump cavity. Among them, 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.

[0068] As Figure 1 and Figure 6 shown, in an embodiment, the volute 221 and the pump housing 231 are disposed on opposite sides of the driving device 21 along the axial direction of the wind wheel 222, the air inlet 2211 is provided on the side of the volute 221 away from the driving device 21, and the axial direction of the wind wheel 222 is consistent with the width direction or the thickness direction of the main body 10.

[0069] In this embodiment, the volute 221 and the pump housing 231 are disposed on opposite sides of the driving device 21 along the axial direction of the wind wheel 222, so that the overall structure arrangement is more regular and compact. An air inlet 2211 is provided on the side of the volute 221 away from the driving device 21, an air outlet 2212 may be provided on the circumferential side of the volute 221, and the wind wheel 222 may be a centrifugal wind wheel 222 disposed in the volute 221. In this way, axial air intake and circumferential air outlet can be realized. Optionally, the wind wheel 222 includes at least two layers of impellers arranged axially. The wind wheel 222 adopting at least two layers of impellers is beneficial to improving the aerodynamic performance, reducing noise, and increasing the work efficiency.

[0070] In one embodiment, the first output end 21a and the second output end 21b are configured to output torque synchronously, so that the wind wheel 222 and the pump wheel 232 rotate synchronously. Thus, when the fan and water pump assembly 20 operates, the driving device 21 can drive the wind wheel 222 and the pump wheel 232 to rotate at the same speed simultaneously, so as to realize the functions of the fan and the water pump simultaneously.

[0071] In another embodiment, the first output end 21a and the second output end 21b are configured to output torque independently of each other, so that the wind wheel 222 and the pump wheel 232 rotate independently of each other. That is, the torques output by the first output end 21a and the second output end 21b are independent of each other and not interfered with. For example, the first output end 21a and the second output end 21b can output torques of the same magnitude or different magnitudes; for another example, the first output end 21a and the second output end 21b can output torques simultaneously, or one of them can output torque while the other does not work. It can be understood that the torques output by the first output end 21a and the second output end 21b are independent of each other, so that the wind wheel 222 and the pump wheel 232 can operate independently of each other. For example, the wind wheel 222 and the pump wheel 232 can rotate synchronously or non-synchronously; for another example, the rotational speeds of the wind wheel 222 and the pump wheel 232 can be the same or different; thus, it can better adapt to different working conditions.

[0072] As Figure 7 shown, in one embodiment, the driving device 21 includes a rotor 211, an output shaft 212 and a stator 213. The rotor 211 is sleeved around the output shaft 212 and can drive the output shaft 212 to rotate together. The two ends of the output shaft 212 respectively form the first output end 21a and the second output end 21b. The wind wheel 222 and the pump wheel 232 are respectively connected to the two ends of the output shaft 212. The stator 213 is sleeved around the rotor 211 and forms a magnetic circuit with the rotor 211 to drive the rotor 211 to rotate.

[0073] In this embodiment, the driving device 21 can adopt a single-shaft double-headed motor. The driving device 21 includes a rotor 211, a stator 213, and an output shaft 212. The stator 213 is fixed within the housing 214 of the driving device 21. For example, the stator 213 can be assembled within the cavity of the housing 214, or the stator 213 can be integrally coated with plastic within the wall of the housing 214. The stator 213 may include a stator core and a winding coil provided on the stator core. The winding coil is energized to drive the rotor 211 to rotate. Optionally, the stator 213 further includes an insulation system coated on the surface of the stator core. Through the insulation system, the winding coil can be separated from the stator core to avoid scratching the winding coil or the risk of short circuit. Among them, the insulation system can be realized by spraying an insulating layer on the surface of the stator core, or by assembling an insulating skeleton outside the stator core. The rotor 211 is accommodated within the inner cavity of the stator 213. The output shaft 212 passes through the central position of the rotor 211. Both ends of the output shaft 212 respectively extend out of both sides of the housing 214. One end of the output shaft 212 close to the volute 221 forms a first output end 21a to connect to the wind wheel 222, and one end of the output shaft 212 close to the pump housing 231 forms a second output end 21b to connect to the pump impeller 232. When the coil winding of the stator 213 is energized, it can drive the rotor 211 to rotate. The rotation of the rotor 211 can drive the output shaft 212 to rotate together, so as to drive the wind wheel 222 and the pump impeller 232 to rotate synchronously through the output shaft 212. At this time, the wind wheel 222 and the pump impeller 232 can rotate simultaneously, in the same direction, and at the same speed.

[0074] As Figure 8 shown, in one embodiment, the driving device 21 includes a stator 213, a first rotor 211A, and a second rotor 211B. The first rotor 211A is used as the first output end 21a to drive and connect to the wind wheel 222. The second rotor 211B is used as the second output end 21b to drive and connect to the pump impeller 232. The stator 213 respectively constructs a magnetic circuit with the first rotor 211A and the second rotor 211B to respectively drive the first rotor 211A and the second rotor 211B to rotate.

[0075] In this embodiment, the driving device 21 can adopt a dual-rotor motor. The two rotors 211 of the dual-rotor motor are respectively drivingly connected to the wind wheel 222 and the pump wheel 232. In this way, only one set of electronic control system is needed to control the operation of the dual-rotor motor, and the wind wheel 222 and the pump wheel 232 can be driven to rotate by the dual-rotor motor. The driving device 21 includes a stator 213, a first rotor 211A and a second rotor 211B. Among them, the first rotor 211A and the second rotor 211B can be arranged radially along the stator 213, or the first rotor 211A and the second rotor 211B are arranged axially along the stator 213. The stator 213 and the first rotor 211A form a first magnetic circuit through an air gap. After the coil winding of the stator 213 is energized, the first rotor 211A can be driven to rotate by the magnetic field of the first magnetic circuit, and then the wind wheel 222 is driven to rotate by the first rotor 211A. The stator 213 and the second rotor 211B form a second magnetic circuit through an air gap. After the coil winding of the stator 213 is energized, the second rotor 211B can be driven to rotate by the magnetic field of the second magnetic circuit, and then the pump wheel 232 is driven to rotate by the second rotor 211B. The first rotor 211A and the second rotor 211B share a stator 213, and the overall structure is simpler, the cost is lower, and the volume is smaller.

[0076] As Figure 8 shown, in one 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 this 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. In this way, the first rotor 211A and the second rotor 211B are arranged radially along the stator 213, and the overall arrangement structure is simple, which is beneficial to reducing the axial dimension of the driving device 21, and further reducing the volume of the fan and water pump assembly 20.

[0077] As Figure 8 shown, in one embodiment, the driving device 21 further includes 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 to the shielding cover 215. The second rotor 211B is rotatably installed in the shielding cover 215. In this embodiment, the shielding cover 215 can be used as an installation carrier for the stator 213, the first rotor 211A and the second rotor 211B, so as to facilitate the installation of the three. Moreover, by setting the shielding cover 215, the second rotor 211B can be separated from the stator 213, playing a role of dry-wet isolation to prevent the water in the pump chamber from entering the stator 213 to ensure the safety of the driving device 21. The stator 213 and the shielding cover 215 can be fixed by potting (such as potting epoxy resin material) or BMC injection molding.

[0078] AsFigure 8 As shown, in one embodiment, the shielding cover 215 is provided with a bearing 217. The first rotor 211A includes a rotor housing, a first magnetic ring, and a first rotating shaft. The rotor housing is sleeved on the periphery of the stator 213. The first magnetic ring is fixed on the inner peripheral surface of the rotor housing and is disposed opposite to the stator 213. One end of the first rotating shaft is connected to the bearing 217, and the other end is connected to the rotor housing. The wind wheel 222 is connected to the rotor housing. In this embodiment, the first magnetic ring can be fixed on the inner peripheral surface of the rotor housing by means of gluing or connecting with fasteners, etc. One end of the first rotating shaft is connected to the bearing 217 in the first accommodating cavity. The other end of the first rotating shaft can be connected and fixed to the rotor housing by means of connecting with fasteners or interference fit, etc. The bearing 217 can play a role in stably supporting the first rotor 211A to ensure the stability of the rotation of the first rotor 211A. The wind wheel 222 and the rotor housing can be integrally formed, or can be a split structure and then assembled and fixed. For example, the wind wheel 222 and the rotor housing can be sleeved by stamping and form an interference fit.

[0079] As Figure 8 As shown, in one embodiment, the driving device 21 further includes a fixed shaft 216. One end of the fixed shaft 216 is connected to the pump housing 231, and the other end is connected to the shielding cover 215. The second rotor 211B includes a shaft sleeve, a second rotating shaft, and a second magnetic ring that are sleeved on the periphery of the fixed shaft 216 in sequence from the inside to the outside. The second rotating shaft is connected to the pump impeller 232. In this embodiment, the fixed shaft 216 remains fixed relative to the shielding cover 215 and the pump housing 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. The second magnetic ring is fixed on the periphery of the second rotating shaft. A second magnetic circuit is formed between the second magnetic ring and the stator 213 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 impeller 232 to rotate through the second rotating shaft, so as to realize the water pump function.

[0080] The above is only an exemplary embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structural transformation made under the technical concept of the present invention by using the content of the specification and drawings of the present invention, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present invention.

Claims

1. A gas water heater, characterized in that: include: A main body, wherein the main body has an air circuit system and a water circuit system; as well as A fan-water pump assembly is installed on the main body, and the fan-water pump assembly includes a driving device and a fan component and a water pump component respectively connected to the driving device. The air inlet of the fan component is connected to the air path system, and the water pump component is connected to the water path system. The driving device is used to control the operation of the fan component so that the fan component drives the airflow to flow into the fan component along the air path system and is discharged from the air outlet of the fan component. The driving device is also used to control the operation of the water pump component so that the water pump component drives the water to flow along the water path system.

2. The gas water heater according to claim 1, characterized in that: The main body includes a burner, a combustion chamber box and a heat exchanger which are arranged in sequence. A combustion chamber is formed inside the combustion chamber box. The side wall of the combustion chamber is provided with an air inlet hole. The gas channel of the burner, the combustion chamber and the smoke channel of the heat exchanger are connected in sequence to form the gas path system. The fan and water pump assembly is arranged on a side of the heat exchanger away from the combustion chamber box.

3. The gas water heater according to claim 2, characterized in that: The burner, the combustion chamber box and the heat exchanger are arranged in sequence from bottom to top, the main body also includes a smoke collecting hood arranged on the top of the heat exchanger, the air path system also includes a smoke collecting cavity formed in the smoke collecting hood, the fan assembly is installed on the smoke collecting hood, and the air inlet of the fan assembly is connected to the smoke collecting cavity.

4. The gas water heater according to claim 2, characterized in that: The main body also includes a water inlet pipeline and a water outlet pipeline, the water inlet pipeline is connected to the water inlet port of the heat exchanger, and the water outlet pipeline is connected to the water outlet port of the heat exchanger. The water inlet pipeline, the heat exchanger and the water outlet pipeline are connected in sequence to form the water system, and the water pump assembly is arranged in the water inlet pipeline or the water outlet pipeline.

5. The gas water heater according to claim 4, characterized in that: The water inlet pipeline includes a water inlet joint, a first water inlet pipe and a second water inlet pipe, the water inlet joint is connected to the water inlet of the water pump assembly via the first water inlet pipe, and the water outlet of the water pump assembly is connected to the water inlet port of the heat exchanger via the second water inlet pipe; Alternatively, the water outlet pipeline includes a water outlet joint, a first water outlet pipe and a second water outlet pipe, the water outlet port of the heat exchanger is connected to the water inlet of the water pump assembly via the first water outlet pipe, and the water outlet of the water pump assembly is connected to the water outlet joint via the second water outlet pipe.

6. The gas water heater according to claim 4, characterized in that: The gas water heater also includes a second water pump arranged in 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 with the water pump assembly to increase the pressure of the water system.

7. The gas water heater according to claim 6, characterized in that: The water outlet end of the water outlet pipe is connected to the water inlet pipe, so that the water inlet pipe, the heat exchanger and the water outlet pipe are connected end to end to form a zero cooling water circulation loop. The second water pump and the water pump assembly are also used to drive the water flow to circulate along the zero cooling water circulation loop.

8. The gas water heater according to claim 4, characterized in that: The water inlet of the water pump assembly is arranged higher than the 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 heater according to any one of claims 1 to 8, characterized in that: The fan assembly includes a volute and a wind wheel arranged in the volute, the volute has the air inlet and the air outlet, the water pump assembly includes a pump casing and a pump wheel arranged in the pump casing, the pump casing has a water inlet and a water outlet, the volute and the pump casing are respectively arranged on both sides of the driving device, the driving device has a first output end and a second output end for torque output, the first output end is drivingly connected to the wind wheel, and the second output end is drivingly connected to the pump wheel.

10. The gas water heater according to claim 9, characterized in that: The volute and the pump housing are disposed on opposite sides of the driving device along the axial direction of the wind wheel, the air inlet is disposed on a side of the volute away from the driving device, and the axial direction of the wind wheel is consistent with the width direction or thickness direction of the main body; Alternatively, the first output end and the second output end are configured to be capable of synchronously outputting torque, so that the wind wheel and the pump wheel rotate synchronously; Alternatively, the first output end and the second output end are configured to be able to output torque independently of each other, so that the wind wheel and the pump wheel rotate independently of each other.

11. The gas water heater according to claim 9, characterized in that: The driving device comprises a rotor, a stator and an output shaft, wherein the rotor is sleeved on the periphery of the output shaft and can drive the output shaft to rotate together, the two ends of the output shaft respectively form the first output end and the second output end, the wind wheel and the pump wheel are respectively connected to the two ends of the output shaft, 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 includes a stator, a first rotor and a second rotor, the first rotor serving as the first output end to drive and connect the wind wheel, the second rotor serving as the second output end to drive and connect the pump wheel, and the stator respectively constructs a magnetic circuit with the first rotor and the second rotor to respectively drive the first rotor and the second rotor to rotate.

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