CN216953522U

CN216953522U - Gas water heater

Info

Publication number: CN216953522U
Application number: CN202123363761.8U
Authority: CN
Inventors: 卢楚鹏; 陆勇文
Original assignee: Guangdong Vanward New Electric Co Ltd
Current assignee: Guangdong Vanward New Electric Co Ltd
Priority date: 2021-12-28
Filing date: 2021-12-28
Publication date: 2022-07-12
Anticipated expiration: 2031-12-28

Abstract

The utility model relates to a gas water heater, which comprises a heat exchange device and a cooling device, wherein the heat exchange device is provided with a water inlet and a water outlet, the water inlet is communicated with a water inlet pipeline, the water outlet is communicated with a water outlet pipeline, water input by the water inlet pipeline can be heated to a preset sterilization temperature through the heat exchange device, and sterilized hot water can be output through the water outlet pipeline; the cooling device is used for cooling hot water output from the water outlet pipeline and preheating cold water input into the heat exchange device from the water inlet pipeline. According to the utility model, the cold water input by the water inlet pipeline is heated to the preset sterilization temperature through the heat exchange device, the cold water input by the water inlet pipeline is effectively sterilized, the sterilized hot water enters the water outlet pipeline, the hot water output from the water outlet pipeline is cooled through the cooling device, and meanwhile, the cold water input into the heat exchange device in the water inlet pipeline is preheated, so that the effect of cooling the hot water in the water outlet pipeline is achieved, and meanwhile, the effect of preheating the cold water input into the water inlet pipeline can be achieved.

Description

Gas water heater

Technical Field

The utility model relates to the technical field of water heaters, in particular to a gas water heater.

Background

Along with the improvement of living standard of people, consumers pay more and more attention to healthy bathing, and healthy bathing requires that the water temperature output by the water heater is proper and the water quality condition of water used for bathing is also required to be considered.

At present, in the existing water heater, cold water flowing in from a water inlet pipeline is generally directly heated to a bathing temperature, then is discharged from a water outlet pipeline and is directly used, and the temperature is difficult to achieve the sterilization effect, so that the used water flowing out from the water outlet pipeline of the water heater contains a large amount of bacteria, and is not beneficial to the health of consumers when being used in bathing or in a kitchen; only a few water heaters have the sterilization function, the hot water is heated to more than 60 ℃ for sterilization, and the sterilized hot water can meet the bathing temperature after being cooled. However, after the sterilized hot water is output from the water outlet pipeline of the water heater, the temperature of the sterilized hot water is reduced by adding cold water and mixing the cold water with the sterilized hot water, so as to achieve the purpose of reducing the temperature. In this cooling method, cold water still contains some bacteria, so the sterilization degree of the mixed warm water cannot be ensured.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a gas water heater, which effectively sterilizes cold water input by a water inlet pipeline, and cools hot water output by a water outlet pipeline by acting on the outer wall of the water outlet pipeline through a cooling device, so that the purpose of cooling the hot water is achieved by avoiding mixing the hot water and the cold water, thereby ensuring that warm water output by the water outlet pipeline is in a completely sterilized state, and improving the healthy bathing effect of a user.

The technical problem is solved by the following technical scheme:

a gas water heater, comprising:

the heat exchange device is provided with a water inlet and a water outlet, the water inlet is communicated with a water inlet pipeline, the water outlet is communicated with a water outlet pipeline, water input from the water inlet pipeline can be heated to a preset sterilization temperature through the heat exchange device, and sterilized hot water can be output through the water outlet pipeline;

and the cooling device is used for reducing the temperature of the outer wall of the water outlet pipeline so as to cool the hot water output from the water outlet pipeline.

Compared with the background technology, the gas water heater of the utility model has the following beneficial effects:

when the gas water heater is used, cold water input by the water inlet pipeline is heated to a preset sterilization temperature through the heat exchange device, so that the cold water input by the water inlet pipeline is effectively sterilized, the sterilized hot water enters the water outlet pipeline, and the temperature of the hot water output by the water outlet pipeline is reduced by the action of the temperature reduction device on the outer wall of the water outlet pipeline, so that the purpose of reducing the temperature of the hot water is achieved by avoiding the mixing of the hot water and the cold water, the warm water output by the water outlet pipeline is ensured to be in a completely sterilized state, and the healthy bathing effect of a user is improved.

In one embodiment, the cooling device is a plate type heat exchanger structure, the plate type heat exchanger structure is provided with a first independent water path and a second independent water path, and water passing through the first independent water path and water passing through the second independent water path can enter into heat exchange; the first independent waterway is communicated with the water inlet, and the second independent waterway is communicated with the water outlet.

In one embodiment, the first individual waterway has a first water inlet and a first water outlet that are independent of each other, the second individual waterway has a second water inlet and a second water outlet, the first water inlet is used for inlet of cold water, the first water outlet is communicated with the water inlet, the second water inlet is communicated with the water outlet, and the second water outlet is used for output of hot water in the second individual waterway.

In one embodiment, the cooling device is formed with a cooling medium channel for entering a cooling medium, and an outer wall of the cooling medium channel contacts with an outer wall of the water outlet pipeline to lower the temperature of the hot water in the water outlet pipeline.

In one embodiment, the cooling device comprises a hollow cooling body; be equipped with out water interface and water inlet interface in the cooling main part, go out the water interface with the inlet channel is kept away from the one end intercommunication of water inlet, the water inlet interface is used for into cold water, and gets into cold water in the cooling main part with the hot water mutual independence and the heat transfer that are disinfected in the outlet channel.

In one embodiment, a waterway pipeline is hermetically arranged in the cooling body, one end of the waterway pipeline is a water inlet end, the other end of the waterway pipeline is a water outlet end, and the water inlet end is communicated with one end, far away from the water outlet, of the water outlet pipeline, so that hot water sterilized by the heat exchange device can flow out of the water outlet end.

In one embodiment, the waterway pipeline is a straight tubular structure.

In one embodiment, the waterway pipeline is an elbow with a serpentine structure.

In one embodiment, the water outlet end is communicated with a water outlet pipeline used for outputting water in the waterway pipeline; and the water outlet pipeline is provided with a control regulating valve for controlling the water flow output by the water channel pipeline.

In one embodiment, the water inlet, the water outlet and the temperature reduction device are positioned on the same side of the heat exchange device.

Drawings

FIG. 1 is a schematic structural diagram of a gas water heater according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of a cooling device according to an embodiment of the present invention;

FIG. 3 is a schematic structural diagram of a gas water heater according to a second embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a cooling device according to a second embodiment of the present invention;

FIG. 5 is a schematic view of another exemplary embodiment of a cooling device according to the present invention;

fig. 6 is a schematic structural view of a cooling device according to a third embodiment of the present invention;

fig. 7 is a schematic structural diagram of a cooling device according to a fourth embodiment of the present invention.

The reference numbers illustrate: 10. a heat exchange device; 101. a heat exchanger; 1011. a water inlet; 1012. a water outlet; 102. a combustion system; 1021. an air inlet; 103. a controller; 104. a smoke exhaust system; 20. a cooling device; 201. cooling the main body; 2011. a water inlet interface; 2012. a water outlet interface; 202. a waterway pipeline; 2021. a water inlet end; 2022. a water outlet end; 203. a first water inlet; 2031. a first water outlet; 204. a second water inlet; 2041. a second water outlet; 30. a water inlet pipeline; 40. a water outlet pipeline; 50. a water outlet pipeline; 60. a water inlet pipeline.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

In the description of the present application, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, when referring to the orientation or positional relationship indicated in the drawings, are used for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be considered as limiting the present application.

In the description of the present application, it is to be understood that the terms "first", "second", if any, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or as implying any indication of the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, the meaning of "a plurality" is two or more unless otherwise specified.

In the description of the present application, it should be noted that unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood in a specific case by those of ordinary skill in the art.

In the description of the present invention, unless otherwise specifically limited, terms such as set, connected and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention by combining the specific contents of the technical solutions.

The first embodiment is as follows:

in one embodiment, referring to fig. 1, a gas water heater includes a heat exchanging device 10, the heat exchanging device 10 has a water inlet 1011 and a water outlet 1012, the water inlet 1011 is connected to a water inlet pipe 30, the water outlet 1012 is connected to a water outlet pipe 40, water input from the water inlet pipe 30 can be heated to a predetermined sterilization temperature through the heat exchanging device 10, and sterilized hot water can be output through the water outlet pipe 40. Therefore, the cold water enters the heat exchanger 10 through the water inlet pipeline 30 for sterilization, so that the cold water input into the water inlet pipeline 30 is effectively sterilized, and the sterilized hot water is output through the water outlet pipeline 40.

In the field, the sterilization temperature is generally over 65 ℃, and a user can set the sterilization temperature according to actual requirements; of course, the sterilization temperature can be set to be below 65 ℃, and the user can set the sterilization temperature according to the sterilization requirement. Therefore, the preset sterilization temperature can be set according to the requirements of users.

Specifically, the heat exchange device 10 includes a heat exchanger 101, a combustion system 102 and a controller 103, wherein the water inlet 1011 and the water outlet 1012 are both disposed on the heat exchanger 101, so that water input from the water inlet pipeline 30 can enter the heat exchanger 101 and flow out from the water outlet pipeline 40; and the combustion system 102 is used to heat the heat exchanger 101; the controller 103 is used for controlling the combustion system 102 to heat the water in the heat exchanger 101 to a sterilization temperature. Therefore, cold water input from the water inlet pipeline 30 enters the heat exchanger 101, the controller 103 controls the combustion system 102 to start to heat the water in the heat exchanger 101 to a preset sterilization temperature so as to sterilize the water in the heat exchanger 101, and the sterilized hot water is output through the water outlet pipeline 40.

In addition, in order to cool down the hot water entering the water outlet pipeline 40 after sterilization, the gas water heater of the utility model further comprises a cooling device 20, the temperature of the outer wall of the water outlet pipeline 40 is acted by the cooling device 20 to cool down the hot water output from the water outlet pipeline 40, so that the purpose of cooling down the hot water is achieved by avoiding mixing the hot water and the cold water, the warm water output from the water outlet pipeline is ensured to be in a completely sterilized state, and the effect of healthy bathing of a user is improved, and the hot water output from the water outlet pipeline is cooled down.

In this embodiment, the cooling device 20 is used for preheating the cold water input into the heat exchange device in the water inlet pipeline 30, besides reducing the temperature of the outer wall of the water outlet pipeline to cool the hot water output from the water outlet pipeline. In particular, it can be understood that; when the temperature reducing device 20 acts on the outer wall of the water outlet pipeline, the temperature of the hot water in the water outlet pipeline is transferred to the temperature reducing device, and the temperature reducing device acts on the cold water in the water inlet pipeline 30, so that the cold water in the water inlet pipeline 30 exchanges heat with the temperature reducing device 20 to preheat the water in the water inlet pipeline 30.

In summary, when the gas water heater of the present invention is in use, cold water is input into the heat exchanger 101 through the water inlet pipeline 30, the controller 103 controls the combustion system 102 to start to heat the cold water in the heat exchanger 101 to sterilization temperature, and the sterilized hot water enters the water outlet pipeline 40, and acts on the outer wall of the water outlet pipeline 40 through the temperature reduction device 20 to reduce the temperature of the hot water output from the water outlet pipeline 40, and at the same time, the heat emitted from the temperature reduction device 20 can preheat the cold water input into the heat exchange device 10 in the water inlet pipeline 30, so as to achieve the effect of reducing the temperature of the hot water in the water outlet pipeline 40, because the temperature reduction device 20 acts on the outer wall of the water outlet pipeline 40 directly to reduce the temperature of the hot water output from the water outlet pipeline 40, the purpose of reducing the temperature of the hot water by mixing the hot water and the cold water is avoided, that is the purpose of reducing the temperature by mixing the sterilized hot water with the cold water containing bacteria, so that the warm water output from the water outlet pipeline 40 can be ensured in a completely sterilized state, the healthy bathing effect of the user is improved, and the preheating effect of the cold water input into the water inlet pipeline 30 is achieved.

In other embodiments, the cooling device may also be formed with a cooling medium channel, the cooling medium channel is used for entering a cooling medium, and an outer wall of the cooling medium channel contacts with an outer wall of the water outlet pipeline to reduce the temperature of the hot water in the water outlet pipeline. It can also be understood that the temperature of the cooling device is reduced by the refrigerant in the refrigerant channel, and the cooling device directly acts on the outer wall of the water outlet pipeline 40, so that the heat exchange between the cooling device and the outer wall of the water outlet pipe is carried out under the action of the refrigerant in the refrigerant channel, and the temperature of the hot water in the water outlet pipeline can also be reduced.

In addition, it is worth to be noted that the water inlet, the water outlet and the cooling device of the embodiment are located on the same side of the heat exchange device, so that the arrangement of pipelines is facilitated, and the internal space can be saved. In this embodiment, the cooling device 20 includes a cooling body 201, and the cooling body 201 is used to lower the temperature of the outer wall of the water outlet pipeline 40 to cool the hot water output from the water outlet pipeline 40. Because the sterilized hot water enters the water outlet pipeline 40, the temperature of the outer wall of the water outlet pipeline 40 generates heat, and the temperature of the outer wall of the water outlet pipeline 40 is reduced by contacting the cooling main body 201 with the outer wall of the water outlet pipeline 40, so that the hot water in the water outlet pipeline 40 can achieve the cooling effect. Therefore, the hot water temperature in the water outlet pipeline 40 causes the outer wall of the water outlet pipeline 40 to generate heat, and the cold water in the cooling main body 201 directly acts on the outer wall of the water outlet pipeline 40, so that the cold water in the cooling main body 201 exchanges heat with the hot water in the water outlet pipeline 40 to achieve the hot water temperature in the cooling water outlet pipeline 40, and simultaneously, the cold water in the water inlet pipeline also has the function of preheating.

Specifically, the cooling main body 201 is a hollow structure, the cooling main body 201 is provided with a water outlet 2012 and a water inlet 2011, the water outlet 2012 is communicated with one end of the water inlet pipeline 30 far away from the water inlet 1011, and the water inlet 2011 is communicated with the water inlet pipeline 60 for feeding cold water, and the cold water entering the cooling main body 201 and the sterilized hot water in the water outlet pipeline 40 are mutually independent and exchange heat. That is, it can be understood that cold water enters the inner cavity of the cooling body 201 through the water inlet port 2011 and then enters the heat exchanger 101 through the water inlet pipeline 30 for sterilization, hot water after sterilization enters the water outlet pipeline 40, and the water outlet pipeline 40 is in contact with the cold water in the inner cavity of the cooling body 201. Therefore, the cold water entering the cooling body 201 through the water inlet port 2011 serves as the cooling liquid of the water outlet pipeline 40, the temperature of the outer wall of the water outlet pipeline 40 is reduced through the cooling liquid, the temperature of the hot water in the water outlet pipeline 40 is reduced, the hot water is discharged through the water outlet end 2022 after the temperature of the hot water is reduced to the bathing temperature of the human body, and meanwhile the cooling liquid is heated under the heat transferred by the outer wall of the water outlet pipeline 40, so that the effect of preheating the cold water input into the heat exchanger 101 from the water inlet pipeline 30 is achieved.

Further, referring to fig. 2, the cooling body 201 is provided with a water channel 202 in a sealed manner, the water channel 202 is a straight tube structure but is not limited to the straight tube structure, and in other embodiments, the water channel 202 may be a structure with other shapes, which is not limited herein and may be changed and selected appropriately according to the actual use situation. Wherein, one end of the water pipeline 202 is a water inlet end 2021, the other end is a water outlet end 2022, the water inlet end 2021 is communicated with one end of the water outlet pipeline 40 far away from the water outlet 1012, so that the hot water sterilized by the heat exchange device 10 can flow out from the water outlet end 2022. Thus, the sterilized hot water enters the water outlet pipe 40 and enters the water channel 202, and is finally output through the water outlet end 2022 of the water channel 202. Because the waterway pipeline 202 and the cooling main body 201 are arranged in a sealing manner, cold water entering the cooling main body 201 from the water inlet interface 2011 cannot leak from the connection part of the waterway pipeline 202 and the cooling main body 201; in addition, since the water channel 202 is disposed in the temperature reducing body 201, the sterilized hot water enters the water channel 202 through the water outlet pipe 40, and then the outer wall of the water channel 202 is cooled by the cold water in the temperature reducing body 201, so that the temperature of the hot water output from the water channel 202 to the user is reduced, and the cold water input from the temperature reducing body 201 to the water inlet pipe 30 is preheated.

Of course, in other embodiments, the outer wall of the cooling body 201 may contact with the outer wall of the water outlet pipeline 40 to achieve the purpose of reducing the temperature of the hot water in the water outlet pipeline 40, and the cooling effect of the cooling method of the above embodiment is better than that of the cooling method of the above embodiment.

It should be noted that the structure of the cooling main body 201 is not limited to the shape structure shown in the following drawings, and may be any shape structure such as a hollow cylinder, a hollow square body, or a hollow oval body structure, which is not limited herein, and therefore, it should also fall within the protection scope of the present invention for a person skilled in the art to reasonably change the structure of the cooling main body 201. The material for manufacturing the cooling body 201 may be a metal material (copper, stainless steel, aluminum alloy, etc.) or a plastic material, and the present inventors may select and change the material appropriately according to the actual use. In some embodiments, the outlet end 2022 is connected to the outlet conduit 50, and the outlet conduit 50 is used for outputting the water in the waterway conduit 202, that is, the hot water after cooling enters the outlet conduit 50 from the outlet end 2022 of the waterway conduit 202, and finally is outputted for the user through the outlet conduit 50.

In some embodiments, the outlet conduit 50 is provided with a control regulating valve, and the control regulating valve controls the flow of water output by the control waterway conduit 202, so as to facilitate the user.

In some embodiments, the combustion system 102 of the gas water heater of the present invention is provided with a gas inlet 1021, gas enters the combustion system 102 through the gas inlet 1021 to be combusted, so as to heat the heat exchanger 101, such that the water temperature in the heat exchanger 101 reaches the set sterilization temperature, and after the water temperature in the heat exchanger 101 reaches the set sterilization temperature, the controller 103 controls the combustion system to maintain the current working condition, so as to maintain the water temperature output by the heat exchanger 101 at the preset sterilization temperature.

Of course, in order to exhaust the flue gas generated by the combustion system 102, the heat exchange device 10 of the gas water heater of the present invention further includes a smoke exhaust system 104, and the flue gas generated by the combustion system 102 is exhausted through the smoke exhaust system 104. The smoke exhaust system 104 is the smoke exhaust system 104 of the conventional gas water heater, and the structure thereof will not be described in detail here.

The second embodiment:

the difference between this embodiment and the first embodiment is: the cooling device 20 is different in structure.

In this embodiment, as shown in fig. 3 and 4, the temperature reducing device is a plate heat exchanger structure, the plate heat exchanger structure has a first individual water path and a second individual water path which are independent from each other, and water passing through the first individual water path and water passing through the second individual water path can exchange heat; the first individual waterway is communicated with the water inlet 1011, and the second individual waterway is communicated with the water outlet 1012. Therefore, cold water enters the heat exchange device from the first independent water path, the cold water is heated to the preset sterilization temperature through the heat exchange device and then enters the second independent water path from the water outlet 1012, the cold water continuously enters the first independent water path and enters the heat exchange device from the water inlet 1011 for heating and sterilization, and the hot water after heating and sterilization enters the second independent water path through the water outlet 1012, so that the hot water in the second independent water path transfers heat to the outer wall of the second independent water path, the heat exchange is carried out between the outer wall of the second independent water path and the outer wall of the first independent water path, the temperature of the hot water in the second independent water path is reduced, and meanwhile, the cold water in the first independent water path is preheated.

Specifically, as shown in fig. 3, 4 and 5, the first single water path has a first water inlet 203 and a first water outlet 2031, the second single water path has a second water inlet 204 and a second water outlet 2041, the first water inlet 203 is used for inlet of cold water, the first water outlet 2031 is communicated with the water inlet 1011, the second water inlet 204 is communicated with the water outlet 1012, and the second water outlet 2041 is used for outlet of hot water in the second single water path. Therefore, cold water enters the first single water channel from the first water inlet 203, is output from the first water outlet 2031 and enters the heat exchange device through the water inlet 1011, the cold water enters the heat exchange device and is heated and sterilized by the heat exchange device, hot water after being heated and sterilized is output from the water outlet 1012 and enters the second water outlet 2041 through the second water inlet 204, and the second water outlet 2041 is communicated with the water outlet pipeline 50, so that the sterilized and cooled warm water is output from the water outlet pipeline 50 for users.

Example three:

the present embodiment differs from the above embodiments in that: the waterway pipe 202 has a different structure.

In this embodiment, referring to fig. 6, the waterway pipeline 202 is a bent pipe with a serpentine structure. It can be understood that the sterilized hot water enters the water outlet pipeline 40, enters the bent pipe with the serpentine structure, and finally is output through the water outlet end 2022 of the bent pipe. Because the time that the hot water after disinfecting flows in the bent pipe of snakelike column structure compares in the time that flows in the waterway pipeline 202 of straight tube column structure long, so cold water (coolant liquid) in the cooling main part 201 is more abundant to the hot water cooling time after disinfecting to reach rapid cooling's effect, also preheated the cold water in the cooling main part 201 fast simultaneously.

Example four:

In this embodiment, referring to fig. 7, the water channel 202 is a plurality of U-shaped pipes sequentially connected end to end, so that it can be understood that the sterilized hot water enters the water outlet pipe 40 and enters the U-shaped pipe, and finally is output through the water outlet end 2022 of the U-shaped pipe. Because the time that the hot water after the disinfection flows in the elbow of the U-shaped pipeline is longer than the time that the hot water flows in the waterway pipeline 202 of the straight tubular structure, the cooling time of the cold water (cooling liquid) in the cooling main body 201 to the hot water after the disinfection is more sufficient, thereby achieving the effect of rapid cooling, and simultaneously, the cold water in the cooling main body 201 is also rapidly preheated.

In the detailed description of the embodiments, various technical features may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The detailed description of the embodiments above only expresses several embodiments of the present invention, and the description is specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent should be subject to the appended claims.

Claims

1. A gas water heater, characterized by, including:

the heat exchanger (10) is provided with a water inlet (1011) and a water outlet (1012), the water inlet (1011) is communicated with a water inlet pipeline (30), the water outlet (1012) is communicated with a water outlet pipeline (40), water input from the water inlet pipeline (30) can be heated to a preset sterilization temperature through the heat exchanger (10), and sterilized hot water can be output through the water outlet pipeline (40);

and the cooling device (20) is used for reducing the temperature of the outer wall of the water outlet pipeline (40) so as to cool the hot water output from the water outlet pipeline (40).

2. The gas water heater of claim 1, wherein the temperature reducing device (20) is a plate heat exchanger structure having independent first and second separate water paths, and water passing through the first separate water path is capable of exchanging heat with water passing through the second separate water path; the first single water path is communicated with the water inlet (1011), and the second single water path is communicated with the water outlet (1012).

3. The gas water heater of claim 2, wherein: first water route alone has first water inlet (203) and first water outlet (2031), the second water route alone has second water inlet (204) and second water outlet (2041), first water inlet (203) is used for into cold water, first water outlet (2031) with water inlet (1011) intercommunication, second water inlet (204) with delivery port (1012) intercommunication, second water outlet (2041) is used for outputting hot water in the second water route alone.

4. The gas water heater of claim 1, wherein: the cooling device (20) is provided with a refrigerant channel, the refrigerant channel is used for entering refrigerant media, and the outer wall of the refrigerant channel is in contact with the outer wall of the water outlet pipeline (40) to reduce the temperature of hot water in the water outlet pipeline (40).

5. The gas water heater of claim 1, wherein: the cooling device (20) comprises a hollow cooling main body (201); be equipped with on cooling main part (201) and go out water connector (2012) and intake interface (2011), go out water connector (2012) with inlet channel (30) are kept away from the one end intercommunication of water inlet (1011), intake interface (2011) is used for into cold water, and gets into cold water in cooling main part (201) with the hot water mutually independent and the heat transfer of being disinfected in outlet channel (40).

6. The gas water heater of claim 5, wherein: a water path pipeline (202) is hermetically arranged in the cooling main body (201), one end of the water path pipeline (202) is a water inlet end (2021), the other end of the water path pipeline (202) is a water outlet end (2022), and the water inlet end (2021) is communicated with one end, far away from the water outlet (1012), of the water outlet pipeline (40), so that hot water sterilized by the heat exchange device (10) can flow out of the water outlet end (2022).

7. The gas water heater of claim 6, wherein: the waterway pipeline (202) is of a straight pipe-shaped structure.

8. The gas water heater of claim 6, wherein: the waterway pipeline (202) is an elbow pipe with a snake-shaped structure.

9. The gas water heater according to claim 6, characterized in that the water outlet end (2022) is communicated with a water outlet pipe (50) for outputting water in the water path pipe (202); and the water outlet pipeline (50) is provided with a control regulating valve for controlling the water flow output by the water channel pipeline (202).

10. The gas fired water heater of any one of claims 1-9, wherein: the water inlet (1011), the water outlet (1012) and the temperature reduction device (20) are positioned on the same side of the heat exchange device (10).