Sterilization mechanism and gas water heater

Abstract

The present invention relates to a sterilization mechanism and a gas water heater, specifically comprising: a water system, a gas branch, an ozone generator and a mixing device, the water system comprising an inlet pipe and an outlet pipe arranged in sequence along a water supply path, the ozone generator being arranged on the gas branch for releasing ozone molecules into the gas branch, the mixing device being connected to the gas branch, the inlet pipe and the outlet pipe, the mixing device being used to mix the ozone molecules in the gas branch with the water flow in the inlet pipe to form a mixed liquid which then flows to the outlet pipe. In this way, the water in the inlet pipe and the ozone molecules will enter the mixing device, and through the mixing action of the mixing device, the ozone can be more fully dissolved in the water to sterilize the water, thereby further improving the sterilization effect of the ozone, so that the sterilization mechanism provided by the present application has a good sterilization effect and can provide the technical effect of hot water with relatively clean water quality.

Description

Technical Field

[0001] The present invention relates to the technical field of sterilization, and in particular to a sterilization mechanism and a gas water heater. Background Art

[0002] Gas water heaters, also known as gas water heaters, are gas appliances that use gas as fuel and transfer heat to cold water flowing through a heat exchanger through combustion heating to prepare hot water. With the improvement of living standards, people pay more and more attention to health issues, and the requirements for water quality of gas water heaters are getting higher and higher.

[0003] Most of the gas water heaters on the market now do not have a sterilization function, or only have a simple filtering device with a silver ion filter and a magnetic core filter to simply filter the water in the gas water heater.

[0004] However, this treatment method does not have an ideal sterilization effect and cannot provide clean water quality that fully meets the requirements. Summary of the invention

[0005] Based on this, the present invention aims at the problem that the existing gas water heaters have poor sterilization effect and cannot provide clean water quality that meets the requirements, and proposes a sterilization mechanism and a gas water heater, which have the technical effects of good sterilization effect and clean water quality.

[0006] A sterilization mechanism, comprising:

[0007] A water system, the water system comprising a water inlet pipe and a water outlet pipe arranged in sequence along a water supply path;

[0008] A gas branch and an ozone generator, wherein the ozone generator is arranged on the gas branch and is used to release ozone molecules into the gas branch;

[0009] A mixing device is connected to the gas branch, the water inlet pipe and the water outlet pipe. The mixing device is used to mix the ozone molecules in the gas branch with the water flow in the water inlet pipe to form a mixed liquid, which then flows to the water outlet pipe.

[0010] In one embodiment, the mixing device includes a first branch, a gas-liquid mixing pump and a second branch, the opposite ends of the first branch are respectively connected to the water inlet pipe and the gas-liquid mixing pump, and the opposite ends of the second branch are respectively connected to the gas-liquid mixing pump and the water outlet pipe;

[0011] The gas-liquid mixing pump is used to force the water flow in the first branch to mix with the ozone molecules in the gas branch to form the mixed liquid, and then pump it to the second branch.

[0012] In one of the embodiments, the sterilization mechanism further includes a bubble generator, which is disposed on the water outlet pipe and is used to form a plurality of micro bubbles in the water flow in the water outlet pipe.

[0013] In one embodiment, the sterilization mechanism further includes a third branch, and opposite ends of the third branch are respectively connected to the water inlet pipe and the water outlet pipe;

[0014] When the first branch and the gas-liquid mixing pump are closed, the third branch is controlled to open.

[0015] In one embodiment, the sterilization mechanism further includes a first control valve, which is disposed on the first branch, and is configured to controllably open or close the first branch;

[0016] When the third branch is controlled to be closed, the first branch is opened under the action of the first control valve.

[0017] In one embodiment, the sterilization mechanism further includes a check valve, and the check valve is arranged on the third branch;

[0018] When the first branch and the gas-liquid mixing pump are turned on, the check valve automatically closes the third branch;

[0019] When the first branch and the gas-liquid mixing pump are closed, the check valve automatically opens the third branch.

[0020] In one embodiment, the check valve includes a check ball and an elastic telescopic portion connected to each other;

[0021] When the first branch and the gas-liquid mixing pump are closed, the elastic telescopic portion is elastically deformed under the pressure of the water flow in the water inlet pipe, and drives the check ball to move to open the third branch;

[0022] When the first branch and the gas-liquid mixing pump are turned on, negative pressure is formed in the third branch, and the negative pressure drives the elastic expansion part to recover elastically and drives the check ball to move to close the third branch.

[0023] In one embodiment, the sterilization mechanism further includes a controller, and the controller is electrically connected to the first control valve and the gas-liquid mixing pump;

[0024] The controller controls the first control valve to open the first branch and controls the gas-liquid mixing pump to be turned on at the same time.

[0025] In one embodiment, the sterilization mechanism further includes a second control valve, which is disposed on the gas branch and between the ozone generator and the gas-liquid mixing pump;

[0026] The second control valve is configured to controllably open or close the gas branch line.

[0027] According to another aspect of the present invention, a gas water heater is provided, comprising a main shell, a heat exchange component and the sterilization mechanism described in any one of the above embodiments, wherein the sterilization mechanism is arranged in the main shell, and the heat exchange component is arranged on the water system for heating the water in the water system.

[0028] In one of the embodiments, the heat exchange component is disposed on the water inlet pipe for heating the water flow in the water inlet pipe, and along the water flow direction of the water supply path, the mixing device is located downstream of the heat exchange component.

[0029] The above-mentioned sterilization mechanism can be used in a gas water heater to sterilize the water in the gas water heater, and can also be used in other structures that require water supply to sterilize water. The sterilization mechanism specifically includes: a water system, a gas branch, an ozone generator and a mixing device. The water system includes an inlet pipe and an outlet pipe arranged in sequence along the water supply path. The ozone generator is arranged on the gas branch to release ozone molecules into the gas branch. The mixing device is connected to the gas branch, the inlet pipe and the outlet pipe. The mixing device is used to mix the ozone molecules in the gas branch with the water flow in the inlet pipe to form a mixed liquid and then flow to the outlet pipe. In this way, the water in the inlet pipe and the ozone molecules will enter the mixing device. Through the mixing action of the mixing device, the ozone can be more fully dissolved in the water to sterilize the water, thereby further improving the sterilization effect of the ozone, so that the sterilization mechanism provided by the present application has a good sterilization effect and can provide a technical effect of hot water with relatively clean water quality. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 A schematic diagram of a sterilization mechanism provided by an embodiment of the present invention;

[0031] Figure 2 A schematic diagram of a gas water heater provided in another embodiment of the present invention.

[0032] : 100, sterilization mechanism; 10, water system; 11, water inlet pipe; 12, water outlet pipe; 30, gas branch; 40, ozone generator; 50, mixing device; 51, first branch; 52, gas-liquid mixing pump; 53, second branch; 60, bubble generator; 70, first control valve; 80, second control valve; 90, third branch; 110, check valve; 111, check ball; 112, elastic expansion part; 120, controller; 200, gas water heater; 210, heat exchange component; 211, heat exchanger; 212, burner; 213, gas proportional valve; 220, flow sensor. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific embodiments disclosed below.

[0034] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0035] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0036] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being "above", "above" or "above" a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being "below", "below" or "below" a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0038] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and do not represent the only implementation method.

[0039] See also Figure 1 An embodiment of the present invention provides a sterilization mechanism 100, which can be used in a gas water heater 200 to sterilize water in the gas water heater 200, and can also be used in other structures that require water supply to sterilize water.

[0040] The sterilization mechanism 100 specifically includes a water system 10, a gas branch 30, an ozone generator 40 and a mixing device 50. The water system 10 includes a water inlet pipe 11 and a water outlet pipe 12 arranged in sequence along the water supply path. The ozone generator 40 is arranged on the gas branch 30 for releasing ozone molecules into the gas branch 30. The mixing device is connected to the gas branch 30, the water inlet pipe 11 and the water outlet pipe 12. The mixing device 50 is used to mix the ozone molecules in the gas branch 30 with the water flow in the water inlet pipe 11 to form a mixed liquid and then flow to the water outlet pipe 12. In this way, the water in the water inlet pipe 11 and the ozone molecules will enter the mixing device 50. Through the mixing action of the mixing device 50, the ozone can be more fully dissolved in the water to sterilize the water, thereby further improving the sterilization effect of the ozone, and then the sterilization mechanism 100 provided by the present application has a good sterilization effect and can provide a technical effect of hot water with relatively clean water quality.

[0041] Specifically, ozone has a rapid inactivation effect on bacteria. Ozone can react with the double bonds of lipids in the bacterial cell wall, penetrate into the bacteria, act on proteins and lipopolysaccharides, change the permeability of the cells, and destroy the structure of the microbial membrane with the oxidative effect of oxygen atoms, thereby causing the death of bacteria and achieving the purpose of sterilization.

[0042] In one embodiment, the mixing device 50 includes a first branch 51, a gas-liquid mixing pump 52 and a second branch 53. The opposite ends of the first branch 51 are respectively connected to the water inlet pipe 11 and the gas-liquid mixing pump 52, that is, the water flow in the water inlet pipe 11 can flow into the gas-liquid mixing pump 52 through the first branch 51. The opposite ends of the second branch 53 are respectively connected to the gas-liquid mixing pump 52 and the water outlet pipe 12, that is, the liquid in the gas-liquid mixing pump 52 can flow into the water outlet pipe 12 through the second branch 53. The gas-liquid mixing pump 52 is used to force the water flow in the first branch 51 to mix with the ozone molecules in the gas branch 30 to form a mixed liquid, and then pump it to the second branch 53. Under the forced action of the gas-liquid mixing pump 52, the ozone molecules can be fully mixed with the water instead of floating on the surface of the water, so that the ozone molecules can sterilize the bacterial cells in the mixed liquid at a deeper level, obtain relatively clean water quality, and flow from the second branch 53 to the water outlet pipe 12, thereby completing the sterilization process.

[0043] In one embodiment, the sterilization mechanism 100 further includes a bubble generator 60, which is disposed on the water outlet pipe 12 and is used to form a plurality of micro bubbles in the water flow in the water outlet pipe 12. The mixed liquid flowing from the second branch 53 to the water outlet pipe 12 is subjected to the action of the bubble generator 60, and a plurality of micro bubbles are formed inside the mixed liquid flowing from the second branch 53 to the water outlet pipe 12. The micro bubbles rub against the water molecules in the water so that the bubble surface carries a negative charge, and produces an adsorption effect on dirt, bacteria, etc. with positive charges, thereby achieving sterilization. When the water contains a large number of micro bubbles, it has a better adsorption and removal effect on dirt and bacteria, thereby further sterilizing the water flow in the water outlet pipe 12, thereby achieving a better sterilization effect.

[0044] Preferably, the micro bubbles generated by the bubble generator 60 are micro-nano bubbles, which have a deep cleansing function, so that the water treated with the micro-nano bubbles not only has a better sterilization effect, but also has a skin beautifying function, which is more beneficial to the skin health of the user.

[0045] In one embodiment, the sterilization mechanism 100 further includes a third branch 90, and the opposite ends of the third branch 90 are respectively connected to the water inlet pipe 11 and the water outlet pipe 12, that is, the water flow in the water inlet pipe 11 can also enter the water outlet pipe 12 through the third branch 90. When the first branch 51 and the gas-liquid mixing pump 52 are closed, the third branch 90 is controlled to open, and the water flow in the water inlet pipe 11 flows directly to the water outlet pipe 12 through the third branch 90 without performing a series of sterilization operations.

[0046] In this way, the sterilization mechanism 100 provided in the present application does not need to mix the ozone molecules with the liquid through the mixing device 50 when the water quality of the water entering the water inlet pipe 11 has met the requirements. While avoiding the waste of resources, it can also avoid excessive ozone molecules in the water, thereby ensuring healthy water use.

[0047] It can be understood that when the third branch 90 is controlled to be closed, the first branch 51 and the gas-liquid mixing pump 52 can also be controlled to be opened. This indicates that the water quality of the water inlet pipe 11 does not meet the requirements and the mixing device 50 is required to mix the ozone molecules with the liquid for sterilization operation.

[0048] In one embodiment, the sterilization mechanism 100 further includes a first control valve 70 , which is disposed on the first branch 51 , and is configured to controllably open or close the first branch 51 .

[0049] When the first control valve 70 is controlled to open the first branch 51, the water in the water inlet pipe 11 flows to the gas-liquid mixing pump 52 through the first branch 51, and the mixed liquid after mixing with the ozone molecules for sterilization flows to the water outlet pipe 12 for water supply.

[0050] When the third branch 90 is controlled to be closed, the first branch 51 is opened under the action of the first control valve 70, so that through the action of the first control valve 70, the opening and closing of the first branch 51 can be intelligently controlled, thereby intelligently controlling whether the sterilization mechanism 100 in this application needs to sterilize the water in the water inlet pipe 11.

[0051] In one embodiment, the sterilization mechanism 100 further includes a second control valve 80 , which is disposed on the gas branch 30 and between the ozone generating device 40 and the mixing device. The second control valve 80 is configured to controllably open or close the gas branch 30 .

[0052] Specifically, when the mixing device 50 is working, when the ozone molecules mixed by the gas-liquid mixing pump 52 are sufficient, the gas branch 30 is closed by the second control valve 80, thereby avoiding excessive ozone molecules in the water, ensuring the sterilization effect while also ensuring the health of the water. When the mixing device 50 is working, when the sterilization effect is weak, that is, when the ozone molecules mixed in the gas-liquid mixing pump 52 are insufficient, the gas branch 30 is opened by the control of the second control valve 80, so that more ozone molecules can enter the gas-liquid mixing pump 52 for mixing, thereby ensuring the sterilization effect.

[0053] In one embodiment, the sterilization mechanism 100 further includes a check valve 110, which is disposed on the third branch 90. When the first branch 51 is opened by the first control valve 70 and the gas-liquid mixing pump 52 is controlled to be opened, the check valve 110 will automatically close the third branch 90, thereby ensuring that all water in the water inlet pipe 11 flows into the mixing device 50. And because the check valve 110 is closed at this time, the gas-liquid mixing pump 52 will not produce an internal circulation phenomenon when it is working, and will only flow along the set water flow direction. When the first branch 51 and the gas-liquid mixing pump 52 are closed, the check valve 110 automatically opens the third branch 90, so that the water in the water inlet pipe 11 can be discharged through the third branch 90.

[0054] In one embodiment, the check valve 110 includes a check ball 111 and an elastic telescopic portion 112 connected to each other. When the first branch 51 and the gas-liquid mixing pump 52 are closed, the elastic telescopic portion 112 elastically deforms under the pressure of the water flow in the water inlet pipe 11, and drives the check ball 111 to move to open the third branch 90, so that the water in the water inlet pipe 11 flows to the water outlet pipe 12. When the first control valve 70 and the gas-liquid mixing pump 52 are opened, a negative pressure is formed in the third branch 90 due to the pumping action of the gas-liquid mixing pump 52. The negative pressure drives the elastic telescopic portion 112 to recover elastically and drives the check ball 111 to move to close the third branch 90, so that all the water in the water inlet pipe 11 flows to the mixing device 50.

[0055] In one embodiment, the sterilization mechanism 100 also includes a controller 120, which is electrically connected to the first control valve 70 and the gas-liquid mixing pump 52. The controller 120 controls the first control valve 70 to open the first branch 51 while controlling the gas-liquid mixing pump 52 to be turned on. At this time, the gas-liquid mixing pump 52 can extract the water in the water inlet pipe 11 through the first branch 51, thereby ensuring the effectiveness of the mixing device 50.

[0056] It can be understood that the controller 120 is also electrically connected to the second control valve 80 and the ozone generator 40, so as to control the amount of ozone molecules generated by the ozone generator 40 and the amount of ozone molecules entering the gas-liquid mixing pump 52, thereby ensuring the sterilization effect while avoiding excessive ozone molecules in the water, thereby ensuring healthy water use.

[0057] According to another aspect of the present application, see Figure 2 , a gas water heater 200 is provided, comprising a main housing, a heat exchange component 210 and a sterilization mechanism 100 provided in any of the above embodiments, the sterilization mechanism 100 is arranged in the main housing, and the heat exchange component 210 is arranged on the water system 10 for heating the water in the water system 10. In this way, the water in the water inlet pipe 11 and the ozone molecules will enter the mixing device 50, and through the mixing action of the mixing device 50, the ozone can be more fully dissolved in the water to sterilize the water, thereby further improving the sterilization effect of the ozone, so that the gas water heater 200 provided by the present application has a good sterilization effect and can provide hot water with relatively clean water quality.

[0058] In one embodiment, the gas water heater 200 includes a flow sensor 220, which is arranged on the water inlet pipe 11 and electrically connected to the controller 120. The flow sensor 220 is used to detect whether there is a water flow signal on the water inlet pipe 11. When the water flow signal of the flow sensor 220 is fed back to the controller 120, the controller 120 sends a command to the heat exchange component 210, thereby heating the water in the water system 10, avoiding dry burning caused by the heat exchange component 210 when there is no water in the sterilization mechanism 100, thereby improving safety.

[0059] In one embodiment, the heat exchange component 210 is arranged on the water inlet pipe 11 for heating the water flow in the water inlet pipe 11, and the mixing device 50 is located downstream of the heat exchange component 210 along the water flow direction, that is, the gas water heater 200 first heats the water and then mixes the water with ozone molecules, thereby ensuring the sterilization effect while avoiding the presence of too many bubbles in the water entering the heat exchange component 210 and affecting the heating effect of the heat exchange component 210.

[0060] Specifically, the heat exchange component 210 includes a heat exchanger 211, a gas proportional valve 213 and a burner 212. When the flow sensor 220 detects the water flow signal of the water inlet pipe 11 and feeds it back to the controller 120, the controller 120 sends a command to the burner 212, and the burner 212 is controlled to open, so that the water in the water inlet pipe 11 is heated to the set temperature of the gas proportional valve 213 through the heat exchanger 211, thereby realizing the heating of the gas water heater 200.

[0061] In one of the embodiments, since the micro-bubbles generated by the bubble generator 60 are micro-nano bubbles, the micro-nano bubbles have a deep cleaning function, so that the water treated with the micro-nano bubbles not only has a better sterilization effect, but also has a skin beautifying function, making the gas water heater 200 provided in the present application more beneficial to the user's skin health.

[0062] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0063] The above-mentioned embodiments only express several implementation methods of the present invention, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the invention patent. It should be pointed out that, for ordinary technicians in this field, several variations and improvements can be made without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the patent of the present invention shall be subject to the attached claims.

Claims

1. A sterilization mechanism, characterized in that: include: A water system (10), the water system (10) comprising a water inlet pipe (11) and a water outlet pipe (12) arranged in sequence along a water supply path; A gas branch (30) and an ozone generating device (40), wherein the ozone generating device (40) is arranged on the gas branch (30) and is used for releasing ozone molecules into the gas branch (30); a mixing device (50) connected to the gas branch (30), the water inlet pipe (11) and the water outlet pipe (12); the mixing device (50) is used to mix the ozone molecules in the gas branch (30) with the water flow in the water inlet pipe (11) to form a mixed liquid, which then flows to the water outlet pipe (12); the mixing device (50) comprises a first branch (51), a gas-liquid mixing pump (52) and a second branch (53); opposite ends of the first branch (51) are connected to the water inlet pipe (11) and the gas-liquid mixing pump (52) respectively, and opposite ends of the second branch (53) are connected to the gas-liquid mixing pump (52) and the water outlet pipe (12) respectively; The gas-liquid mixing pump (52) is used to forcibly mix the water flow in the first branch (51) with the ozone molecules in the gas branch (30) to form the mixed liquid, and then pump it to the second branch (53); The sterilization mechanism (100) further comprises a bubble generator (60), wherein the bubble generator (60) is arranged on the water outlet pipe (12) and is used to form a plurality of micro bubbles in the water flow in the water outlet pipe (12); The sterilization mechanism (100) further comprises a third branch (90), wherein opposite ends of the third branch (90) are respectively connected to the water inlet pipe (11) and the water outlet pipe (12); The sterilization mechanism (100) further comprises a first control valve (70), the first control valve (70) being arranged on the first branch (51), the first control valve (70) being configured to controllably open the first branch (51) or close the first branch (51); when the third branch (90) is controlled to be closed, the first branch (51) is opened under the action of the first control valve (70); The sterilization mechanism (100) further comprises a check valve (110), wherein the check valve (110) is arranged on the third branch (90); when the first branch (51) and the gas-liquid mixing pump (52) are opened, the check valve (110) automatically closes the third branch (90); when the first branch (51) and the gas-liquid mixing pump (52) are closed, the check valve (110) automatically opens the third branch (90); the check valve (110) comprises a check ball (111) and an elastic telescopic portion (111) connected to each other. 2); when the first branch (51) and the gas-liquid mixing pump (52) are closed, the elastically retractable portion (112) is elastically deformed under the pressure of the water flow in the water inlet pipe (11), and drives the check ball (111) to move to open the third branch (90); when the first branch (51) and the gas-liquid mixing pump (52) are opened, the third branch (90) forms a negative pressure, and the negative pressure drives the elastically retractable portion (112) to elastically recover and drives the check ball (111) to move to close the third branch (90).

2. The sterilization mechanism according to claim 1, characterized in that: The micro bubbles generated by the bubble generator (60) are micro-nano bubbles.

3. The sterilization mechanism according to claim 1, characterized in that: The sterilization mechanism (100) further comprises a controller (120), wherein the controller (120) is electrically connected to the first control valve (70) and the gas-liquid mixing pump (52); The controller (120) controls the first control valve (70) to open the first branch (51) and controls the gas-liquid mixing pump (52) to be turned on at the same time.

4. The sterilization mechanism according to claim 1, characterized in that: The sterilization mechanism (100) further comprises a second control valve (80), wherein the second control valve (80) is arranged on the gas branch (30) and is located between the ozone generating device (40) and the gas-liquid mixing pump (52); The second control valve (80) is configured to controllably open or close the gas branch line (30).

5. A gas water heater, characterized in that: It comprises a main shell, a heat exchange component (210) and the sterilization mechanism (100) according to any one of claims 1 to 4, wherein the sterilization mechanism (100) is arranged in the main shell, and the heat exchange component (210) is arranged on the water system (10) for heating water in the water system (10).

6. The gas water heater according to claim 5, characterized in that: The heat exchange component (210) is arranged on the water inlet pipe (11) for heating the water flow in the water inlet pipe (11), and along the water flow direction of the water supply path, the mixing device (50) is located downstream of the heat exchange component (210).

7. The gas water heater according to claim 5, characterized in that: The gas water heater comprises a flow sensor (220), and the flow sensor (220) is arranged on the water inlet pipe (11).

8. The gas water heater according to claim 7, characterized in that: The heat exchange component (210) comprises a heat exchanger (211), a gas proportional valve (213) and a burner (212); when the flow sensor (220) detects a water flow signal from the water inlet pipe (11), the burner (212) is controlled to open.

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