Water mixing device for gas water heater and gas water heater

Abstract

The present invention relates to the technical field of household appliances, and in particular to a water mixing device of a gas water heater and a gas water heater. The water mixing device of the gas water heater comprises: a shell; a water inlet joint, which is arranged on the shell, and one end of which is suitable for connecting with a water outlet pipe of the body of the gas water heater; a water inlet pipe, the first end of which is connected with the other end of the water inlet joint, and the second end of which is extended from the first end to the inner wall of the shell opposite to the first end; a water outlet structure, one end of which is arranged in the shell, and the other end of which is suitable for flowing out the mixed water in the shell. By setting the water inlet pipe, the first end of the water inlet pipe is connected with the water inlet joint on the shell, and the second end of which is extended from the first end to the inner wall of the shell opposite to the first end, so that the water flowing out of the water outlet pipe of the body of the gas water heater can flow into the shell after sufficient heat exchange with the water stored in the shell of the water mixing device in the water inlet pipe, so that the water temperature in the shell will not be too high or too low, and when it is supplied to the user, the user experience can be improved.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, and in particular to a water mixing device for a gas water heater and a gas water heater. Background Art

[0002] Gas water heater, also known as gas water heater, refers to a gas appliance that uses gas as fuel and transfers heat to cold water flowing through a heat exchanger through combustion heating to achieve the purpose of preparing hot water. The basic working principle of a gas water heater is that cold water enters the water heater and flows through the water-gas linkage valve body. Under the action of a certain pressure difference of the flowing water, it pushes the water-gas linkage valve and simultaneously pushes the DC power micro switch to connect the power and start the pulse igniter. At the same time, the gas transmission electromagnetic valve is opened, and the pulse igniter continues to automatically ignite again until the ignition successfully enters the normal working state. This process lasts for about 5-10 seconds. When the gas water heater is in the working process or ignition process, there are water shortages or insufficient water pressure, electricity shortages, gas shortages, excessive hot water temperature, accidental blowouts, and other faults, the pulse igniter will automatically cut off the power supply by detecting the signal fed back by the sensing needle. The gas transmission electromagnetic valve immediately returns to the original normally closed valve state in the absence of electricity. That is to say, the gas has been cut off at this time, and the gas water heater is closed for safety protection.

[0003] The gas water heaters currently sold on the market need a period of time to reach the previous bathing temperature after being turned off and restarted during use, which seriously affects the bathing comfort of the user. For this reason, the prior art discloses a continuous temperature gas water heater, that is, a water energy mixing device is provided on the water outlet pipe of the gas water heater body, the water energy mixing device includes a cavity, a water inlet joint connected to the cavity, and a water outlet joint connected to the cavity, a liquid sealing pipe is provided in the cavity, one end of the liquid sealing pipe has a gap with the inner wall of the cavity, and the other end is connected to the water outlet joint, so that water flowing out of the water outlet pipe of the gas water heater can enter the water energy mixing device from the water inlet joint, mix with the water in the water energy mixing device, and then flow out from the water outlet joint through the liquid sealing pipe. However, since this structure only has a water inlet joint at the water inlet part of the water energy mixing device, after the water inlet joint guides the water output of the gas water heater to the cavity of the water energy mixing device, the high-temperature or low-temperature water flowing out of the gas water heater is directly mixed with the stored water in the cavity of the water energy mixing device and then supplied to the user. There is still a problem that the water temperature supplied to the user is too high or too low, and the user experience is still poor. Summary of the invention

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defects of poor heat exchange effect and poor user experience of the water energy mixing device of the gas water heater in the prior art, thereby providing a water mixing device and a gas water heater that improve the heat exchange effect and enhance the user experience.

[0005] In order to solve the above problems, the present invention provides a water mixing device for a gas water heater in a first aspect, comprising:

[0006] a housing, wherein the housing is suitable for storing water;

[0007] A water inlet joint, provided on the shell, one end of which is suitable for connecting with the water outlet pipe of the main body of the gas water heater;

[0008] A water inlet pipe, the first end of which is connected to the other end of the water inlet joint, and the second end of which extends from the first end to an inner wall of the shell opposite to the first end;

[0009] The water outlet structure has one end disposed in the shell and the other end adapted to allow the mixed water in the shell to flow out.

[0010] Furthermore, the water inlet pipe is provided with a plurality of water outlet holes.

[0011] Furthermore, the water inlet pipe is provided with a plurality of first water outlet holes near the first end thereof;

[0012] And / or, the water inlet pipe is provided with a plurality of second water outlet holes near the second end.

[0013] Furthermore, there are multiple first water outlet holes and / or second water outlet holes, and they are evenly arranged along a circumference of the water inlet pipe.

[0014] Furthermore, the second water outlet hole has the same aperture as the first water outlet hole.

[0015] Furthermore, the second end of the water inlet pipe is arranged in contact with the inner wall of the shell.

[0016] Furthermore, the water outlet structure comprises:

[0017] a water outlet pipe, a first end of which is disposed in the housing;

[0018] A water outlet joint is arranged on the shell, and the water outlet joint is communicated with the second end of the water outlet pipe.

[0019] Furthermore, the water outlet pipe is arranged in a vertical direction, and the water inlet pipe is arranged in the middle of the side wall of the shell, and is arranged in a cross structure with the water outlet pipe.

[0020] Furthermore, the first end of the water outlet pipe is spaced apart and close to the top wall of the shell.

[0021] Furthermore, the water outlet pipe is provided with a plurality of water inlet holes near the second end thereof, and the diameter of the water inlet holes is smaller than the diameter of the first water outlet hole on the water inlet pipe.

[0022] A second aspect of the present invention provides a gas water heater, comprising the above-mentioned water mixing device.

[0023] The technical solution of the present invention has the following advantages:

[0024] 1. The water mixing device of the gas water heater provided by the present invention comprises: a shell, wherein the shell is suitable for storing water; a water inlet joint, which is arranged on the shell and one end of which is suitable for connecting with the water outlet pipe of the main body of the gas water heater; a water inlet pipe, wherein the first end is connected to the other end of the water inlet joint and the second end extends from the first end to the inner wall of the shell opposite to the first end; and a water outlet structure, wherein one end of the water outlet structure is arranged in the shell and the other end of the water outlet structure is suitable for flowing out the mixed water in the shell.

[0025] By setting a water inlet pipe, the first end of the water inlet pipe is connected to the water inlet joint on the shell, and the second end extends from the first end to the inner wall of the shell opposite to the first end, so that the water flowing out from the water outlet pipe of the gas water heater body can flow into the shell after sufficient heat exchange with the water stored in the shell of the mixing device in the water inlet pipe, instead of directly mixing the water in the water outlet pipe of the gas water heater body with the water stored in the shell. In this way, the water temperature in the shell will not be too high or too low, and the user experience can be improved when it is supplied to the user.

[0026] 2. The water mixing device of the gas water heater provided by the present invention is provided with a first water outlet hole near the first end of the water inlet pipe, so that the water flowing into the shell from the water inlet pipe can be ejected from the first water outlet hole in a radial shape to all sides, and a second water outlet hole is provided near the second end, so that the water that does not flow out from the first water outlet hole can fully exchange heat with the water stored in the shell before flowing out, further improving the heat exchange effect. At the same time, since a hole is provided on the water inlet pipe, even if air is dissolved in the water flowing out of the gas water heater, the water outlet hole can also have an exhaust function, making the water flow noise smaller and improving the user experience.

[0027] 3. The water mixing device of the gas water heater provided by the present invention provides a plurality of first water outlet holes and second water outlet holes, and evenly arranges them around the water inlet pipe, so that the water outlet from the water inlet pipe to the shell is more uniform, and thus the water outlet from the gas water heater body and the water stored in the shell are mixed more evenly, preventing the temperature of some water from being too high or too low.

[0028] 4. The water mixing device of the gas water heater provided by the present invention sets the apertures of the first water outlet hole and the second water outlet hole to be the same, so that the incoming water can flow out of the first water outlet hole and the second water outlet hole evenly, thereby preventing the sudden change of the aperture size relative to the pipe diameter, which causes the change of water flow rate.

[0029] 5. The water mixing device of the gas water heater provided by the present invention is arranged so that there is no gap between the second end of the water inlet pipe and the inner wall of the shell by placing the second end of the water inlet pipe in contact with the inner wall of the shell, and the water in the water inlet pipe will not flow into the shell from the second end of the water inlet pipe before heat exchange, so that the water in the water inlet pipe can be emitted from the first water outlet hole and the second water outlet hole after sufficient heat exchange, thereby ensuring the heat exchange effect.

[0030] 6. The water mixing device of the gas water heater provided by the present invention arranges the water outlet pipe in a vertical direction, and the water inlet pipe is arranged in the middle of the side wall of the shell, and is arranged in a cross structure with the water outlet pipe, so that water enters horizontally and exits vertically, so that the water flow is mixed to the greatest extent, thereby achieving better reverse heat exchange.

[0031] 7. The water mixing device of the gas water heater provided by the present invention forms a liquid-sealed opening at the first end of the water outlet pipe by arranging the first end of the water outlet pipe close to the top wall of the shell. Water can flow out of the water outlet pipe only when the liquid level in the shell is higher than the first end, thereby further ensuring the water mixing effect.

[0032] 8. The water mixing device of the gas water heater provided by the present invention arranges multiple water inlet holes on the water outlet pipe near its second end, and the aperture of the water inlet holes is smaller than the aperture of the first water outlet hole on the water inlet pipe, so that the water inlet holes arranged on the water outlet pipe will not affect the rising water flow in the shell until the entire shell is filled and flows out from the first end of the water outlet pipe, so that the whole shell presents a reverse heat exchange of hot flow downward and cold flow upward or hot flow upward and cold flow downward, which greatly improves the heat exchange effect. At the same time, the water inlet holes can effectively reduce the resistance of the pipeline and ensure pressure balance. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 It is a structural schematic diagram of the gas water heater of the present invention;

[0035] Figure 2 is a cross-sectional view of the gas water heater of the present invention;

[0036] Figure 3 It is a structural schematic diagram of a water mixing device of a gas water heater of the present invention;

[0037] Figure 4 It is a partial structural schematic diagram of the water mixing device of the gas water heater of the present invention;

[0038] Figure 5 It is a schematic diagram of the structure in which the water inlet pipe and the water outlet pipe of the present invention intersect.

[0039] Description of reference numerals:

[0040] 1-shell; 2-water inlet joint; 3-water inlet pipe; 4-first water outlet hole; 5-second water outlet hole; 6-water outlet pipe; 7-water outlet joint; 8-water inlet hole; 9-body; 10-heat exchanger; 11-water outlet pipe; 12-water mixing device. DETAILED DESCRIPTION

[0041] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0042] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] like Figure 1 - Figure 5As shown, this embodiment proposes a water mixing device for a gas water heater, comprising: a shell 1, in which water is suitable for storing water; a water inlet joint 2, which is arranged on the shell 1 and one end of which is suitable for connecting with a water outlet pipe 11 of a main body 9 of the gas water heater; a water inlet pipe 3, a first end of which is connected to the other end of the water inlet joint 2, and a second end of which extends from the first end to an inner wall of the shell 1 opposite to the first end; a water outlet structure, one end of which is arranged in the shell 1 and the other end of which is suitable for flowing out the mixed water in the shell 1.

[0046] By arranging a water inlet pipe 3 in the water mixing device, the first end of the water inlet pipe 3 is connected to the water inlet joint 2 on the shell 1, and the second end extends from the first end to the inner wall of the shell 1 opposite to the first end, so that the water flowing out from the water outlet pipe 11 of the main body 9 of the gas water heater can flow into the shell 1 after sufficient heat exchange with the water stored in the shell 1 of the water mixing device 12 in the water inlet pipe 3, instead of directly mixing the water of the water outlet pipe 11 of the main body 9 of the gas water heater with the water stored in the shell 1. In this way, the water temperature in the shell 1 will not be too high or too low, and the user experience can be improved when it is supplied to the user.

[0047] like Figure 3 As shown, the housing 1 of the water mixing device includes two upper and lower housings for easy assembly and installation. The water inlet pipe 3 is arranged in the middle of the side wall of the housing 1, and the water outlet structure is arranged in the vertical direction.

[0048] like Figure 4 As shown, the water inlet pipe 3 is provided with a plurality of water outlet holes, specifically, the water inlet pipe 3 is provided with a plurality of first water outlet holes 4 near its first end, and the water inlet pipe 3 is provided with a plurality of second water outlet holes 5 near its second end. By providing the first water outlet holes 4 near its first end, the water flowing into the housing 1 from the water inlet pipe 3 can be ejected from the first water outlet holes 4 in an emitting manner, and the second water outlet holes 5 are provided near the second end, so that the water that does not flow out from the first water outlet holes 4 can be fully heat-exchanged with the water stored in the housing 1 before flowing out, further improving the heat exchange effect. At the same time, since the holes are provided on the water inlet pipe 3, even if air is dissolved in the water flowing out of the gas water heater, the water outlet holes can also have an exhaust function, so that the noise of the water flow is smaller and the user experience is improved. As a convertible embodiment, it can also be that only the water inlet pipe 3 is provided with a plurality of first water outlet holes 4 near its first end, or only the water inlet pipe 3 is provided with a plurality of second water outlet holes 5 near its second end. As a changeable implementation, a water outlet hole may be provided in the middle or other position of the water inlet pipe 3. As a changeable implementation, no water outlet hole may be provided on the water inlet pipe 3.

[0049] There are multiple first water outlet holes 4 and / or second water outlet holes 5, and they are evenly arranged around the water inlet pipe 3. By setting the first water outlet holes 4 and the second water outlet holes 5 to be multiple and evenly arranged around the water inlet pipe 3, the water from the water inlet pipe 3 to the shell 1 is more even, and then the water out of the gas water heater body 9 and the water stored in the shell 1 are mixed more evenly, preventing the temperature of some water from being too high or too low. As a convertible embodiment, the water outlet holes can also be unevenly arranged around the water inlet pipe 3.

[0050] In order to make the incoming water flow out evenly from the first water outlet hole 4 and the second water outlet hole 5, the second water outlet hole 5 has the same number and the same aperture as the first water outlet hole 4. This can also prevent the size of the water inlet pipe 3 from suddenly changing when the apertures are different, causing the water flow rate to change, and facilitate the control of the incoming water flow rate. As a convertible embodiment, the apertures of the first water outlet hole 4 and the second water outlet hole 5 can also be set to be different, and the number can be set to be different.

[0051] In actual design, the number of the first water outlet holes 4 can be set to 6. As a convertible implementation, the number can also be 8, or 9, or other suitable numbers.

[0052] like Figure 4 As shown, the second end of the water inlet pipe 3 is arranged in contact with the inner wall of the shell 1. By arranging the second end of the water inlet pipe 3 in contact with the inner wall of the shell 1, there is no gap between the second end of the water inlet pipe 3 and the inner wall of the shell 1, and the water in the water inlet pipe 3 will not flow into the shell 1 from the second end of the water inlet pipe 3 before heat exchange, so that the water in the water inlet pipe 3 can be emitted from the first water outlet 4 and the second water outlet 5 after sufficient heat exchange, thereby ensuring the heat exchange effect. In order to prevent the existence of a gap between the second end of the water inlet pipe 3 and the inner wall of the shell 1, and water flowing out of the gap, a sealing structure can also be arranged between the second end of the water inlet pipe 3 and the inner wall of the shell 1. Of course, if the second end of the water inlet pipe 3 can be arranged in close contact with the inner wall of the shell 1, a sealing structure can also be omitted. This can be specifically adjusted according to actual needs, and no excessive restrictions are made here. As a convertible embodiment, it can also be that the second end of the water inlet pipe 3 is arranged with a gap between the inner wall of the shell 1.

[0053] The water outlet structure includes: a water outlet pipe 6, a first end of which is arranged in the shell 1; and a water outlet joint 7, which is arranged on the shell 1, and the water outlet joint 7 is connected to the second end of the water outlet pipe 6. Specifically, the water outlet pipe 6 is arranged in the vertical direction, and the water inlet pipe 3 is arranged in the middle of the side wall of the shell 1, and is arranged in a cross structure with the water outlet pipe 6. By arranging the water outlet pipe 6 in the vertical direction, and the water inlet pipe 3 is arranged in the middle of the side wall of the shell 1, and is arranged in a cross structure with the water outlet pipe 6, water enters horizontally and exits vertically, so that the water flow is mixed to the greatest extent, and better reverse heat exchange is achieved.

[0054] The first end of the water outlet pipe 6 is spaced close to the top wall of the shell 1. By spaced close to the top wall of the shell 1, the first end of the water outlet pipe 6 forms a liquid seal, and water can only flow out of the water outlet pipe 6 when the liquid level in the shell 1 is higher than the first end, further ensuring the mixing effect of water. As a convertible embodiment, the first end of the water outlet pipe 6 can also be arranged in contact with the top wall of the shell 1, and a hole is opened at a position close to the first end of the water outlet pipe 6 for water to enter the water outlet pipe 6, or, as Figure 5 As shown, the first end of the water outlet pipe 6 is spaced apart from the top wall of the shell 1 , and a plurality of water inlet holes 8 are opened near the first end of the water outlet pipe 6 , and the aperture of the water inlet holes 8 is the same as that of the first water outlet hole 4 and the second water outlet hole 5 .

[0055] like Figure 3 As shown, the outlet pipe 6 is provided with a plurality of water inlet holes 8 near its second end, and the aperture of the water inlet holes 8 is smaller than the aperture of the first water outlet hole 4 on the water inlet pipe 3, and the number of the water inlet holes 8 is also smaller than the number of the first water outlet holes 4. By providing a plurality of water inlet holes 8 near its second end, and the aperture of the water inlet holes 8 is smaller than the aperture of the first water outlet hole 4 on the water inlet pipe 3, the water inlet holes 8 provided on the outlet pipe 6 will not affect the rising of the water flow in the shell 1 until the entire shell 1 is filled and flows out from the first end of the outlet pipe 6, so that the entire shell 1 presents a reverse heat exchange of hot flow downward and cold flow upward or hot flow upward and cold flow downward, which greatly improves the heat exchange effect. At the same time, the provision of the water inlet holes 8 can effectively reduce the resistance of the pipe and ensure pressure balance. As a convertible embodiment, it is also possible to provide one water inlet hole 8 or more water inlet holes 8 near its second end of the outlet pipe 6. As a convertible implementation, the number of the water inlet holes 8 may be greater than or equal to the number of the first water outlet holes 4 .

[0056] like Figure 1 - Figure 2 As shown, this embodiment also proposes a gas water heater, including the above-mentioned water mixing device 12 and a main body 9 of the gas water heater, a heat exchanger 10 is provided in the main body 9, and the water mixing device 12 is connected to the water outlet end of the main body 9 of the gas water heater through a water outlet pipe 11.

[0057] By connecting a water mixing device 12 to the water outlet end of the main body 9 of the gas water heater, the problem of the outlet water temperature fluctuating can be effectively solved. For example, after the water heater is briefly shut down and then restarted, tap water enters the water heater and the high-temperature stored water in the heat exchange system is pressed out first. The high-temperature stored water enters the shell 1 of the water mixing device 12 through the heat exchanger outlet pipe 11, and after mixing with the stored water in the shell 1 for heat exchange, it flows out of the entire machine through the upper port of the water outlet pipe 6. At the same time, after a part of the cold water enters the heat exchange system, the cold water that has not been heated and flows out due to delayed ignition enters the shell 1 of the water mixing device 12 again, and after mixing with the relatively high-temperature stored water in the shell 1 for heat exchange to increase the temperature, it flows out of the entire machine through the upper port of the water outlet pipe 6, thereby eliminating the fluctuating temperature of the water heater caused by a brief shutdown after startup and improving the constant temperature performance of the gas water heater, while achieving the purpose of saving water resources.

[0058] At the same time, since a water inlet pipe 3 is provided and a water outlet hole is provided on the water inlet pipe 3, the water flow in the water inlet pipe is fully heat-exchanged with the water stored in the shell 1, and then flows out from the water outlet hole of the water inlet pipe 3 in a radial manner into the shell 1, so that the heat transfer is more uniform, preventing the water temperature flowing out of the water mixing device 12 from being too high or too low, and can also reduce the water flow noise, further improving the user experience.

[0059] In the design, taking a 13L gas water heater as an example, the hot water stored in the burner after the water supply is cut off is about 100ml. If the temperature is 90℃, it can be converted into 50℃ hot water through neutralization by the water mixing device 12. If the cold water of the water mixing device 12 is 25℃, it can also reach 50℃ through neutralization by hot water. According to Q=cmΔt, there is the following quantitative relationship: 100*(90-50)=V*(50-25), and V=160ml is estimated. In this case, the water mixing device 12 selects 160ml to meet the requirements in theory. If the outlet water temperature of the water heater is 25℃ cold water, it needs to be converted into 47℃ hot water through neutralization by the water mixing device 12, and the hot water temperature of the water mixing device 12 is 50℃, there is the following quantitative relationship: 100*(47-25)=V*(50-47), and V=800ml is estimated. In this case, the water mixing device 12 selects 800ml to meet the requirements in theory. That is, the volume of the water mixing device 12 can be selected as 160ml≤V≤800ml.

[0060] The water flow rate per unit time can be obtained by the required water volume. Then, by drilling a hole in the water inlet pipe 3, the water flow rate can meet the demand. In this way, the cold and hot water mixing effect can be controlled by changing parameters such as the size and number of the holes according to the different cold and hot water mixing requirements of different units.

[0061] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention.

Claims

1. A water mixing device for a gas water heater, characterized in that: include: A housing (1), wherein the housing (1) is suitable for storing water; A water inlet joint (2) is provided on the housing (1), one end of which is suitable for connecting to a water outlet pipe (11) of the body (9) of the gas water heater; A water inlet pipe (3), the first end of which is connected to the other end of the water inlet joint (2), and the second end of which extends from the first end to an inner wall of the housing (1) opposite to the first end; A water outlet structure, one end of which is arranged in the shell (1), and the other end of which is suitable for allowing the mixed water in the shell (1) to flow out; The water inlet pipe (3) is provided with a plurality of first water outlet holes (4) near its first end, and the water inlet pipe (3) is provided with a plurality of second water outlet holes (5) near its second end.

2. The water mixing device for a gas water heater according to claim 1, characterized in that: The first water outlet hole (4) and / or the second water outlet hole (5) are multiple and are evenly arranged along the circumference of the water inlet pipe (3).

3. The water mixing device for a gas water heater according to claim 1, characterized in that: The second water outlet hole (5) has the same hole diameter as the first water outlet hole (4).

4. The water mixing device of the gas water heater according to any one of claims 1 to 3, characterized in that: The second end of the water inlet pipe (3) is arranged in contact with the inner wall of the shell (1).

5. The water mixing device of the gas water heater according to any one of claims 1 to 3, characterized in that: The water outlet structure comprises: A water outlet pipe (6), a first end of which is disposed inside the housing (1); A water outlet joint (7) is provided on the housing (1), and the water outlet joint (7) is in communication with the second end of the water outlet pipe (6).

6. The water mixing device for a gas water heater according to claim 5, characterized in that: The water outlet pipe (6) is arranged in a vertical direction, and the water inlet pipe (3) is arranged in the middle of the side wall of the shell (1) and is arranged in a cross structure with the water outlet pipe (6).

7. The water mixing device for a gas water heater according to claim 6, characterized in that: The first end of the water outlet pipe (6) is spaced apart and close to the top wall of the shell (1).

8. The water mixing device for a gas water heater according to claim 5, characterized in that: The water outlet pipe (6) is provided with a plurality of water inlet holes (8) near its second end, and the diameter of the water inlet holes (8) is smaller than the diameter of the first water outlet hole (4) on the water inlet pipe (3).

9. A gas water heater, characterized in that: It comprises a water mixing device (12) as claimed in any one of claims 1 to 8.

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