Waterway system of heating water heater and heating water heater

Abstract

The utility model belongs to the technical field of intelligent household appliances, and particularly relates to a waterway system of a heating water heater and the heating water heater. The waterway system of the heating water heater comprises a living water pipeline, a first heat exchanger and a water server; the domestic water pipeline comprises a first water inlet, a first water outlet and a domestic hot water outlet; the first heat exchanger is connected with a domestic water pipeline, the water server is arranged between the first water outlet and the domestic hot water outlet, and water enters the first heat exchanger through the first water inlet for heat exchange, then flows out through the first water outlet and then flows out from the domestic hot water outlet after flowing through the water server; according to the structure, the water server is arranged at the water outlet of the living water pipeline, so that the water outlet temperature accuracy and the flow stability are improved.

Description

Technical Field

[0001] This application relates to the field of smart home appliance technology, and in particular to a water circuit system and a heating hot water boiler. Background Technology

[0002] Gas-fired heating and hot water boilers are key equipment for providing heating and domestic hot water in modern homes and commercial spaces. Their stability and efficiency are crucial to the user experience.

[0003] Currently, to achieve precise control of water flow and maintain a constant outlet water temperature, many gas-fired heating and hot water boilers integrate a water servo at their inlet valve. This method adjusts the output water temperature by regulating the inflow of tap water, aiming to provide a more comfortable and energy-efficient user experience.

[0004] However, because the water servo is directly connected to the inlet pipe, it experiences significant pressure, which can cause the internal valve core to become misaligned, directly affecting the accuracy of flow regulation. Secondly, placing the water servo at the inlet position limits the initial water flow velocity. When the heating boiler is ignited and running, the heat accumulated inside the main heat exchanger cannot be dissipated quickly, causing significant fluctuations in the outlet water temperature. Therefore, placing the water servo at the inlet valve of the heating boiler leads to lower accuracy in outlet water temperature and unstable outlet flow. Utility Model Content

[0005] This application provides a heating hot water boiler to solve the problem that the water servo installed in the inlet valve of the heating hot water boiler will result in low accuracy of the outlet water temperature and unstable outlet water flow.

[0006] In a first aspect, embodiments of this application provide a water system for a heating hot water boiler, including: a domestic water pipeline, a first heat exchanger, and a water servo;

[0007] The domestic water pipeline includes a first inlet, a first outlet, and a domestic hot water outlet; the first heat exchanger is connected to the domestic water pipeline, and the water servo is located between the first outlet and the domestic hot water outlet. Water enters the first heat exchanger through the first inlet, exchanges heat, flows out through the first outlet, then flows through the water servo and finally flows out through the domestic hot water outlet.

[0008] As an optional implementation, the water system provided in this application further includes: a water outlet valve, which is disposed between the water servo and the domestic hot water outlet, or the water outlet valve is disposed between the water servo and the first water outlet.

[0009] As an optional implementation, the water system provided in this application includes a connecting pipe disposed between the outlet valve and the water servo in the domestic water pipeline.

[0010] As an optional implementation, the water system provided in this application has a curved connecting pipe.

[0011] As an optional implementation, the water system provided in this application further includes: a first temperature sensor; the first temperature sensor is disposed between the outlet valve and the water servo, and the first temperature sensor is used to detect the temperature of domestic hot water outlet.

[0012] As an optional implementation, the water system provided in this application uses a polypropylene and glass fiber reinforced water outlet valve.

[0013] Secondly, embodiments of this application provide a heating hot water boiler, including: a heating water pipeline and a water system as described in any of the above-mentioned claims, wherein the heating water pipeline includes a first branch, the first branch is connected to the first heat exchanger, and the first branch is not connected to the domestic water pipeline.

[0014] As an optional implementation, the heating hot water boiler provided in this application further includes: a first three-way valve and a second branch; the first three-way valve is connected to the first branch and the second branch respectively, and the water in the second branch flows through an external heating pipe for heating.

[0015] As an optional implementation, the heating hot water boiler provided in this application further includes: a tap water inlet pipe and a second three-way valve; the tap water inlet pipe includes a tap water inlet, a third branch and a fourth branch, and the second three-way valve is connected to the third branch and the fourth branch respectively;

[0016] Water flows in through the tap water inlet, passes through the second three-way valve, and enters the third branch and / or the fourth branch. Water in the third branch enters the first heat exchanger through the first inlet, and water in the fourth branch enters the heating water pipeline.

[0017] As an optional implementation, the heating water boiler provided in this application further includes: a second heat exchanger, which is connected to the heating water pipeline and is used to heat the water in the heating water pipeline.

[0018] This application provides a water system for a heating hot water boiler and a heating hot water boiler. The water system for the heating hot water boiler includes: a domestic water pipeline, a first heat exchanger, and a water servo. The domestic water pipeline includes a first inlet, a first outlet, and a domestic hot water outlet. The first heat exchanger is connected to the domestic water pipeline. The water servo is located between the first outlet and the domestic hot water outlet. Water enters the first heat exchanger through the first inlet, exchanges heat, flows out through the first outlet, then flows through the water servo, and finally flows out through the domestic hot water outlet. This structure improves the accuracy of the outlet water temperature and the stability of the flow rate by setting the water servo at the outlet of the domestic water pipeline. Attached Figure Description

[0019] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application.

[0020] Figure 1 Schematic diagram of the water system for the heating hot water boiler provided in this application Figure 1 ;

[0021] Figure 2 Schematic diagram of the water system for the heating hot water boiler provided in this application Figure 2 ;

[0022] Figure 3 Schematic diagram of the water system for the heating hot water boiler provided in this application Figure 3 ;

[0023] Figure 4 A schematic diagram of the heating hot water boiler provided in this application;

[0024] Figure 5 This is a partial structural diagram of the heating hot water boiler provided in this application.

[0025] The accompanying drawings illustrate specific embodiments of this application, which will be described in more detail below. These drawings and descriptions are not intended to limit the scope of the concept in any way, but rather to illustrate the concept of this application to those skilled in the art through reference to particular embodiments.

[0026] Reference numerals in the attached diagram: 1. Domestic water pipeline; 101. First inlet; 102. First outlet; 103. Domestic hot water outlet; 2. First heat exchanger; 3. Water servo; 4. Outlet valve; 5. Connecting pipe; 6. First temperature sensor; 7. Heating water pipeline; 701. First branch; 702. Second branch; 8. First three-way valve; 9. Tap water inlet pipeline; 901. Tap water inlet; 902. Third branch; 903. Fourth branch; 10. Second three-way valve; 11. Second heat exchanger. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0028] First, those skilled in the art should understand that these embodiments are merely for explaining the technical principles of this utility model and are not intended to limit the scope of protection of this utility model. Those skilled in the art can make adjustments as needed to adapt to specific application scenarios.

[0029] Secondly, it should be noted that in the description of this utility model, the terms "inner" and "outer," etc., which indicate the direction or positional relationship, are based on the direction or positional relationship shown in the accompanying drawings. This is only for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation of this utility model.

[0030] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0031] Gas-fired heating and hot water boilers are key equipment for providing heating and domestic hot water in modern homes and commercial spaces. Their stability and efficiency are crucial to the user experience.

[0032] Currently, a water servo is integrated into the inlet valve of a gas-fired heating and hot water boiler. By adjusting the flow rate of tap water, the output water temperature is adjusted to achieve a more comfortable user experience and higher energy efficiency.

[0033] However, this layout, where the water servo is directly connected to the inlet pipe, exposes it to significant pressure, which can easily cause the internal valve core to become misaligned, thus affecting the accuracy of flow regulation. Furthermore, the water servo located at the inlet restricts the initial water flow velocity, making it difficult for the heat accumulated inside the main heat exchanger to dissipate quickly at ignition, resulting in significant fluctuations in the outlet water temperature. Therefore, placing the water servo at the inlet valve of the heating water boiler leads to problems of low accuracy in outlet water temperature and unstable outlet water flow.

[0034] To address the aforementioned issues, this application provides a water system for a heating hot water boiler, integrating key components such as domestic water pipes, a first heat exchanger, and a water servo. The domestic water pipes introduce cold water through a first inlet, which then undergoes heat exchange in the first heat exchanger before hot water flows out from a first outlet. A water servo is installed between the first outlet and the domestic hot water outlet, precisely regulating the water flow to ensure that the hot water flowing from the domestic hot water outlet is not only at the correct temperature but also flows at a stable and reliable rate.

[0035] The technical solution of this application and how the technical solution of this application solves the above-mentioned technical problems are described in detail below with specific embodiments. These specific embodiments can be combined with each other, and the same or similar concepts or processes may not be described again in some embodiments. The embodiments of this application will now be described with reference to the accompanying drawings.

[0036] This application provides a water circuit system for a heating hot water boiler, such as Figure 1 As shown, a water system for a heating hot water boiler includes: a domestic water pipeline 1, a first heat exchanger 2, and a water servo 3;

[0037] The domestic water pipeline 1 includes a first inlet 101, a first outlet 102, and a domestic hot water outlet 103; the first heat exchanger 2 is connected to the domestic water pipeline 1, and the water servo 3 is set between the first outlet 102 and the domestic hot water outlet 103. Water enters the first heat exchanger 2 through the first inlet 101, exchanges heat, flows out through the first outlet 102, then flows through the water servo 3 and flows out from the domestic hot water outlet 103.

[0038] A heating hot water boiler is a device that integrates domestic hot water supply. It comprises a domestic water pipeline 1, a first heat exchanger 2, and a water servo 3, each ensuring a stable output of hot water. The domestic water pipeline 1, serving as the main channel for hot water transmission, is designed with a first inlet 101, a first outlet 102, and a domestic hot water outlet 103. Cold water first enters the first heat exchanger 2 through the first inlet 101 for heating. In the first heat exchanger 2, the cold water absorbs heat and rises to the preset domestic water temperature, then flows out through the first outlet 102. Further regulation by the water servo 3 ensures that the hot water is ultimately supplied to users from the domestic hot water outlet 103.

[0039] The first heat exchanger 2 is responsible for heating the introduced cold water to the set temperature. This can be achieved by utilizing the heat transfer from the heating system. This design improves energy efficiency and reduces additional energy consumption. The water servo 3 can more precisely adjust the hot water supply according to preset conditions or the user's actual needs, ensuring that the required hot water is always provided. The first heat exchanger 2 can be a stainless steel plate heat exchanger. Stainless steel heat exchangers are corrosion-resistant and have a long service life, especially when treating domestic water, effectively preventing equipment damage or efficiency reduction due to water quality issues. The plate design achieves heat exchange through channels composed of a series of thin plates, which not only increase the heat transfer area but also improve thermal efficiency.

[0040] In daily use, users can enjoy comfortable hot water service with simple operation. First, ensure the water source is correctly connected to the first inlet 101, then start the water heater's heating function. Cold water then enters the first heat exchanger 2 and is heated to the set temperature. Subsequently, the heated hot water is regulated by the water servo 3 and finally flows out from the domestic hot water outlet 103 for user use. This process not only ensures a continuous supply of hot water but also ensures that the temperature and pressure of the hot water remain at a stable level, meeting the different hot water needs of different users.

[0041] This application provides a heating hot water boiler, which includes: a domestic water pipeline 1, a first heat exchanger 2, and a water servo 3; the domestic water pipeline 1 includes a first inlet 101, a first outlet 102, and a domestic hot water outlet 103; the first heat exchanger 2 is connected to the domestic water pipeline 1, and the water servo 3 is disposed between the first outlet 102 and the domestic hot water outlet 103. Water enters the first heat exchanger 2 through the first inlet 101, exchanges heat, flows out through the first outlet 102, then flows through the water servo 3, and finally flows out through the domestic hot water outlet 103; this structure improves the accuracy of the outlet water temperature and the stability of the flow rate by setting a water servo at the outlet of the domestic water pipeline.

[0042] In one alternative implementation, such as Figure 2 , Figure 3 As shown, the water system also includes: a water outlet valve 4, which is located between the water servo 3 and the domestic hot water outlet 103, or between the water servo 3 and the first water outlet 102.

[0043] The water system mainly consists of a domestic water pipeline 1, a first heat exchanger 2, and a water servo 3. The domestic water pipeline 1 comprises three key parts: a first inlet 101, a first outlet 102, and a domestic hot water outlet 103. The first heat exchanger 2 is closely connected to the domestic water pipeline 1 and is responsible for the heat exchange process; while the water servo 3 is located between the first outlet 102 and the domestic hot water outlet 103, serving to regulate water temperature and flow rate. In addition, the water system can be equipped with an outlet valve 4. The outlet valve 4 has a flexible location and can be installed between the water servo 3 and the domestic hot water outlet 103, or between the water servo 3 and the first outlet 102.

[0044] Water enters through the first inlet 101 and exchanges heat with the heat source of the heating water boiler in the first heat exchanger 2, thereby increasing the water temperature. Subsequently, the water flows through the water servo 3, which intelligently adjusts the water temperature and flow rate according to actual needs, ensuring that the water temperature flowing from the domestic hot water outlet 103 always meets the user's settings. The addition of the outlet valve 4 further enhances the flexibility of the water system, allowing users to turn the hot water supply on or off as needed, or adjust the water supply volume, thus meeting the usage needs of different scenarios.

[0045] In one alternative implementation, such as Figure 2 , Figure 3 As shown, the domestic water pipeline 1 includes a connecting pipe 5 located between the outlet valve 4 and the water servo 3.

[0046] The domestic water pipeline 1 of the heating hot water boiler includes not only a first inlet 101, a first outlet 102, and a domestic hot water outlet 103, but also a connecting pipe 5 to optimize the water flow path. Specifically, a connecting pipe 5 is installed between the outlet valve 4 and the water servo 3 to ensure that hot water can flow smoothly from the first heat exchanger 2 to the final domestic hot water outlet 103. The entire process begins with cold water entering the first heat exchanger 2 through the first inlet 101 for heating. The heated water then flows out through the first outlet 102, and flows through the outlet valve 4, the connecting pipe 5, and the water servo 3, finally being supplied to users through the domestic hot water outlet 103.

[0047] A connecting pipe 5 is installed in the domestic water pipe 1 to ensure smooth water flow. The outlet valve 4, as the core component controlling the hot water flow, can adjust the hot water supply according to the user's actual needs, avoiding unnecessary waste. The water servo 3 further precisely controls the hot water temperature to meet the water usage requirements in different scenarios. The connecting pipe 5 acts as a bridge between the two, ensuring efficient and stable hot water transfer between the two components, allowing the entire system to flexibly respond to various water usage demands. Furthermore, by adjusting the opening of the outlet valve 4 and the parameters of the water servo 3, users can not only obtain the required amount of hot water but also enjoy a precisely controlled and comfortable hot water experience, greatly improving water comfort and energy efficiency.

[0048] In one alternative implementation, the connecting pipe 5 is bent.

[0049] In the domestic water piping system 1 of the heating hot water boiler, the connecting pipe 5 between the outlet valve 4 and the water servo 3 is designed in a curved shape, for example, a U-shaped pipe. Firstly, it serves as a crucial channel for water flow between the outlet valve 4 and the water servo 3, ensuring a smooth and efficient flow of hot water. The curved structure not only increases the length of the water flow path, contributing to a more even distribution of heat, but also provides a natural buffer zone.

[0050] The curved shape acts as a buffer zone for water storage, a characteristic that is particularly important when faced with sudden changes in water flow. When a user suddenly increases or decreases their hot water usage, the pressure in the domestic water pipe 1 will change, and the curved shape can effectively absorb these pressure fluctuations, preventing impact or damage to other components.

[0051] The curved section is located between the outlet valve 4 and the water servo 3. It not only needs to withstand the high-temperature hot water from the heat exchanger, but also needs to ensure that the hot water is transferred to the water servo 3 at appropriate pressure and temperature, so as to supply the user.

[0052] In one alternative implementation, such as Figure 2 , Figure 3 As shown, the water system also includes: a first temperature sensor 6; the first temperature sensor 6 is disposed between the outlet valve 4 and the water servo 3, and is used to detect the temperature of the domestic hot water outlet.

[0053] The water system is equipped with a first temperature sensor 6, which is positioned between the outlet valve 4 and the water servo 3 to ensure accurate detection of the domestic hot water temperature. This allows the water system to accurately monitor the temperature of the hot water flowing to the user.

[0054] This design improves heating efficiency and hot water comfort. Precise temperature control means the water system avoids unnecessary energy consumption, reducing operating costs and equipment wear, thus extending the equipment's lifespan. Overall, the placement of the first temperature sensor 6 optimizes water system performance and improves energy efficiency. In this way, the heating boiler can provide users with a stable and comfortable hot water supply.

[0055] In one alternative implementation, the outlet valve 4 is made of polypropylene with glass fiber reinforcement.

[0056] The outlet valve 4 controls the flow of hot water. This outlet valve 4 is made of a composite material of polypropylene and glass fiber. Polypropylene is a thermoplastic with characteristics such as lightweight, corrosion resistance, and high temperature resistance, while the addition of glass fiber greatly enhances the material's strength and wear resistance. This composite material makes the outlet valve 4 both lightweight and durable, capable of withstanding high-temperature and high-pressure working environments for extended periods.

[0057] The choice of polypropylene and glass fiber as the material for the outlet valve 4 is primarily based on its excellent physical properties and chemical stability. Polypropylene itself has good corrosion resistance, resisting the erosion of chemicals in hot water and ensuring the long-term stable operation of the outlet valve 4. The reinforcement of glass fiber gives the outlet valve 4 higher strength and wear resistance, enabling it to withstand greater water pressure and more frequent opening and closing operations.

[0058] This application provides a heating hot water boiler, such as Figure 4 As shown, a heating hot water boiler includes: a heating water pipeline 7 and the water system provided above. The heating water pipeline 7 includes a first branch 701, which is connected to a first heat exchanger 2. The first branch 701 is not connected to the domestic water pipeline 1.

[0059] A heating and hot water boiler is a device that integrates heating and hot water supply functions. The boiler includes a heating water pipeline 7 and a water system. The heating water pipeline 7 is divided into several parts, specifically a first branch 701. This first branch 701 is specifically connected to a first heat exchanger 2 for efficient heat transfer. The first branch 701 is independent of the domestic water pipeline 1 used for daily water use; that is, they are not connected.

[0060] First, directly connecting the first branch 701 of the heating water pipe 7 to the first heat exchanger 2 ensures a stable and efficient heat supply to the heating system, thereby improving heating efficiency. Second, the separation of the first branch 701 from the domestic water pipe 1 is primarily to prevent impurities in the heating water from entering the domestic water system, ensuring the safety and cleanliness of domestic water.

[0061] In one alternative implementation, such as Figure 4 , Figure 5 As shown, the heating hot water boiler also includes: a first three-way valve 8 and a second branch 702; the first three-way valve 8 is connected to the first branch 701 and the second branch 702 respectively, and the water in the second branch 702 flows through the external heating pipe for heating.

[0062] The heating water boiler also includes two key components: a first three-way valve 8 and a second branch 702. The first three-way valve 8, as an important water flow control device, is connected to the first branch 701 and the newly added second branch 702 in the heating water pipe 7. The second branch 702 is responsible for directing water flow to external heating pipes, which are distributed throughout the spaces requiring heating, thereby achieving the function of heating.

[0063] The introduction of the first three-way valve 8 allows the heating water boiler to flexibly adjust the water flow distribution according to actual needs. When heating demand is high, the water flow in the second branch 702 can be increased to provide more heat; while when demand is low or heating is not needed, the water flow in the second branch 702 can be reduced or shut off, thereby saving energy. In addition, the second branch 702 is directly connected to the external heating pipes, ensuring that heat can be efficiently and directly transferred to the space that needs to be heated, improving the heating effect.

[0064] In one alternative implementation, such as Figure 4 As shown, the heating hot water boiler also includes: a tap water inlet pipe 9 and a second three-way valve 10; the tap water inlet pipe 9 includes a tap water inlet 901, a third branch 902 and a fourth branch 903, and the second three-way valve 10 is connected to the third branch 902 and the fourth branch 903 respectively.

[0065] Water flows in through the tap water inlet 901, and then enters the third branch 902 and / or the fourth branch 903 through the second three-way valve 10. The water in the third branch 902 enters the first heat exchanger 2 through the first inlet 101, and the water in the fourth branch 903 enters the heating water pipe 7.

[0066] The heating water boiler further integrates two key components: the tap water inlet pipe 9 and the second three-way valve 10. The tap water inlet pipe 9 consists of a tap water inlet 901, a third branch 902, and a fourth branch 903, forming a water inlet system. The second three-way valve 10 serves as the core control device of the heating water boiler, connected to both the third branch 902 and the fourth branch 903. When tap water flows in from the inlet 901, the second three-way valve 10 controls the water flow to either the third branch 902 or the fourth branch 903, or both, as needed.

[0067] Through precise control of the second three-way valve 10, the heating water boiler can adjust the water flow into the third branch 902 and the fourth branch 903 according to actual needs. Water from the third branch 902 enters the first heat exchanger 2 to heat the circulating water or provide hot water; while water from the fourth branch 903 directly enters the heating water pipe 7 to provide heat to the heating system. This design not only ensures an adequate supply of heating and domestic water but also improves energy efficiency and reduces unnecessary waste.

[0068] A water flow sensor and a temperature sensor can also be installed on the tap water inlet pipe 9. The installation of these sensors on the tap water inlet pipe 9 of the heating water boiler plays a crucial role in improving the boiler's intelligence, optimizing energy efficiency, and enhancing the user experience. The water flow sensor detects the flow rate of cold water entering the boiler in real time, while the temperature sensor measures the temperature of this cold water. The data collected by these two sensors allows the boiler control system to obtain key information about its current operating status and make precise adjustments to ensure that the boiler always operates at its most efficient level.

[0069] In one alternative implementation, such as Figure 4 As shown, the heating hot water boiler also includes a second heat exchanger 11, which is connected to the heating water pipe 7 and is used to heat the water in the heating water pipe 7.

[0070] The second heat exchanger 11 can be a gas-fired heat exchanger, mainly to meet the high-power heat output requirements of the heating hot water boiler. The gas-fired heat exchanger uses gas as a heat source, generates heat through the combustion process, and efficiently transfers this heat to the water flow.

[0071] A heating hot water boiler is a device used to provide hot water for space heating. This device includes a second heat exchanger 11. The second heat exchanger 11 is a key component of the heating hot water boiler; it is directly connected to the heating water pipe 7 and serves to heat the water in the heating water pipe.

[0072] The second heat exchanger 11 is installed in the heating water boiler to improve its thermal efficiency and heating effect. Through the design of the second heat exchanger 11, heat energy can be utilized more fully, and heat can be transferred more effectively to the water in the heating water pipes 7. This not only improves heating efficiency but also saves energy and reduces operating costs to a certain extent.

[0073] The technical solution of this utility model has been described in conjunction with the specific embodiments shown in the accompanying drawings. However, it will be readily understood by those skilled in the art that the protection scope of this utility model is obviously not limited to these specific embodiments. Without departing from the principle of this utility model, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of this utility model.

Claims

1. A water system for a heating hot water boiler, characterized in that, include: Domestic water piping, primary heat exchanger, and water servo; The domestic water pipeline includes a first inlet, a first outlet, and a domestic hot water outlet; The first heat exchanger is connected to the domestic water pipeline. The water servo is located between the first water outlet and the domestic hot water outlet. Water enters the first heat exchanger through the first water inlet, exchanges heat, flows out through the first water outlet, flows through the water servo, and then flows out from the domestic hot water outlet.

2. The water system according to claim 1, characterized in that, Also includes: A water outlet valve is provided between the water servo and the domestic hot water outlet, or between the water servo and the first water outlet.

3. The water system according to claim 2, characterized in that, The domestic water pipeline includes a connecting pipe disposed between the water outlet valve and the water servo.

4. The water system according to claim 3, characterized in that, The connecting pipe is curved.

5. The waterway system according to any one of claims 2-4, characterized in that, Also includes: The first temperature sensor is located between the outlet valve and the water servo, and is used to detect the temperature of the domestic hot water outlet.

6. The waterway system according to any one of claims 2-4, characterized in that, The water outlet valve is made of polypropylene and glass fiber.

7. A heating hot water boiler, characterized in that, include: The heating water pipeline and the water system according to any one of claims 1-6, wherein the heating water pipeline includes a first branch, the first branch is connected to the first heat exchanger, and the first branch is not connected to the domestic water pipeline.

8. The heating hot water boiler according to claim 7, characterized in that, Also includes: The first three-way valve and the second branch are respectively connected to the first branch and the second branch, and the water in the second branch flows through the external heating pipe for heating.

9. The heating hot water boiler according to claim 8, characterized in that, Also includes: The tap water inlet pipe includes a tap water inlet, a third branch, and a fourth branch, and the second three-way valve is connected to the third branch and the fourth branch respectively. Water flows in through the tap water inlet, passes through the second three-way valve, and enters the third branch and / or the fourth branch. Water in the third branch enters the first heat exchanger through the first inlet, and water in the fourth branch enters the heating water pipeline.

10. The heating hot water boiler according to claim 7, characterized in that, Also includes: The second heat exchanger is connected to the heating water pipeline and is used to heat the water in the heating water pipeline.

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